mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-12 04:26:42 +07:00
af77b97413
The sink rate read from supported link rate table is in KHz as per spec
while in drm, the saved clock is in deca-KHz. So divide the link rate by
10 before storing.
Reading of rates was added by:
commit fc0f8e2531 ("drm/i915/skl: Read sink supported rates from edp
panel")
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Sonika Jindal <sonika.jindal@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
5695 lines
159 KiB
C
5695 lines
159 KiB
C
/*
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* Copyright © 2008 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* Authors:
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* Keith Packard <keithp@keithp.com>
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*
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*/
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#include <linux/i2c.h>
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#include <linux/slab.h>
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#include <linux/export.h>
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#include <linux/notifier.h>
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#include <linux/reboot.h>
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#include <drm/drmP.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_crtc.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_edid.h>
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#include "intel_drv.h"
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#include <drm/i915_drm.h>
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#include "i915_drv.h"
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#define DP_LINK_CHECK_TIMEOUT (10 * 1000)
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struct dp_link_dpll {
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int link_bw;
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struct dpll dpll;
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};
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static const struct dp_link_dpll gen4_dpll[] = {
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{ DP_LINK_BW_1_62,
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{ .p1 = 2, .p2 = 10, .n = 2, .m1 = 23, .m2 = 8 } },
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{ DP_LINK_BW_2_7,
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{ .p1 = 1, .p2 = 10, .n = 1, .m1 = 14, .m2 = 2 } }
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};
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static const struct dp_link_dpll pch_dpll[] = {
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{ DP_LINK_BW_1_62,
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{ .p1 = 2, .p2 = 10, .n = 1, .m1 = 12, .m2 = 9 } },
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{ DP_LINK_BW_2_7,
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{ .p1 = 1, .p2 = 10, .n = 2, .m1 = 14, .m2 = 8 } }
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};
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static const struct dp_link_dpll vlv_dpll[] = {
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{ DP_LINK_BW_1_62,
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{ .p1 = 3, .p2 = 2, .n = 5, .m1 = 3, .m2 = 81 } },
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{ DP_LINK_BW_2_7,
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{ .p1 = 2, .p2 = 2, .n = 1, .m1 = 2, .m2 = 27 } }
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};
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/*
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* CHV supports eDP 1.4 that have more link rates.
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* Below only provides the fixed rate but exclude variable rate.
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*/
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static const struct dp_link_dpll chv_dpll[] = {
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/*
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* CHV requires to program fractional division for m2.
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* m2 is stored in fixed point format using formula below
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* (m2_int << 22) | m2_fraction
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*/
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{ DP_LINK_BW_1_62, /* m2_int = 32, m2_fraction = 1677722 */
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{ .p1 = 4, .p2 = 2, .n = 1, .m1 = 2, .m2 = 0x819999a } },
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{ DP_LINK_BW_2_7, /* m2_int = 27, m2_fraction = 0 */
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{ .p1 = 4, .p2 = 1, .n = 1, .m1 = 2, .m2 = 0x6c00000 } },
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{ DP_LINK_BW_5_4, /* m2_int = 27, m2_fraction = 0 */
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{ .p1 = 2, .p2 = 1, .n = 1, .m1 = 2, .m2 = 0x6c00000 } }
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};
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/* Skylake supports following rates */
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static const int gen9_rates[] = { 162000, 216000, 270000,
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324000, 432000, 540000 };
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static const int chv_rates[] = { 162000, 202500, 210000, 216000,
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243000, 270000, 324000, 405000,
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420000, 432000, 540000 };
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static const int default_rates[] = { 162000, 270000, 540000 };
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/**
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* is_edp - is the given port attached to an eDP panel (either CPU or PCH)
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* @intel_dp: DP struct
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*
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* If a CPU or PCH DP output is attached to an eDP panel, this function
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* will return true, and false otherwise.
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*/
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static bool is_edp(struct intel_dp *intel_dp)
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{
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struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
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return intel_dig_port->base.type == INTEL_OUTPUT_EDP;
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}
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static struct drm_device *intel_dp_to_dev(struct intel_dp *intel_dp)
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{
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struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
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return intel_dig_port->base.base.dev;
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}
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static struct intel_dp *intel_attached_dp(struct drm_connector *connector)
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{
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return enc_to_intel_dp(&intel_attached_encoder(connector)->base);
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}
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static void intel_dp_link_down(struct intel_dp *intel_dp);
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static bool edp_panel_vdd_on(struct intel_dp *intel_dp);
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static void edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync);
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static void vlv_init_panel_power_sequencer(struct intel_dp *intel_dp);
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static void vlv_steal_power_sequencer(struct drm_device *dev,
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enum pipe pipe);
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static int
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intel_dp_max_link_bw(struct intel_dp *intel_dp)
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{
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int max_link_bw = intel_dp->dpcd[DP_MAX_LINK_RATE];
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switch (max_link_bw) {
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case DP_LINK_BW_1_62:
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case DP_LINK_BW_2_7:
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case DP_LINK_BW_5_4:
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break;
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default:
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WARN(1, "invalid max DP link bw val %x, using 1.62Gbps\n",
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max_link_bw);
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max_link_bw = DP_LINK_BW_1_62;
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break;
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}
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return max_link_bw;
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}
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static u8 intel_dp_max_lane_count(struct intel_dp *intel_dp)
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{
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struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
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struct drm_device *dev = intel_dig_port->base.base.dev;
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u8 source_max, sink_max;
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source_max = 4;
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if (HAS_DDI(dev) && intel_dig_port->port == PORT_A &&
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(intel_dig_port->saved_port_bits & DDI_A_4_LANES) == 0)
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source_max = 2;
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sink_max = drm_dp_max_lane_count(intel_dp->dpcd);
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return min(source_max, sink_max);
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}
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/*
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* The units on the numbers in the next two are... bizarre. Examples will
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* make it clearer; this one parallels an example in the eDP spec.
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*
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* intel_dp_max_data_rate for one lane of 2.7GHz evaluates as:
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*
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* 270000 * 1 * 8 / 10 == 216000
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*
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* The actual data capacity of that configuration is 2.16Gbit/s, so the
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* units are decakilobits. ->clock in a drm_display_mode is in kilohertz -
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* or equivalently, kilopixels per second - so for 1680x1050R it'd be
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* 119000. At 18bpp that's 2142000 kilobits per second.
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*
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* Thus the strange-looking division by 10 in intel_dp_link_required, to
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* get the result in decakilobits instead of kilobits.
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*/
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static int
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intel_dp_link_required(int pixel_clock, int bpp)
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{
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return (pixel_clock * bpp + 9) / 10;
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}
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static int
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intel_dp_max_data_rate(int max_link_clock, int max_lanes)
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{
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return (max_link_clock * max_lanes * 8) / 10;
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}
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static enum drm_mode_status
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intel_dp_mode_valid(struct drm_connector *connector,
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struct drm_display_mode *mode)
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{
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struct intel_dp *intel_dp = intel_attached_dp(connector);
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struct intel_connector *intel_connector = to_intel_connector(connector);
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struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
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int target_clock = mode->clock;
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int max_rate, mode_rate, max_lanes, max_link_clock;
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if (is_edp(intel_dp) && fixed_mode) {
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if (mode->hdisplay > fixed_mode->hdisplay)
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return MODE_PANEL;
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if (mode->vdisplay > fixed_mode->vdisplay)
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return MODE_PANEL;
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target_clock = fixed_mode->clock;
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}
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max_link_clock = intel_dp_max_link_rate(intel_dp);
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max_lanes = intel_dp_max_lane_count(intel_dp);
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max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
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mode_rate = intel_dp_link_required(target_clock, 18);
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if (mode_rate > max_rate)
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return MODE_CLOCK_HIGH;
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if (mode->clock < 10000)
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return MODE_CLOCK_LOW;
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if (mode->flags & DRM_MODE_FLAG_DBLCLK)
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return MODE_H_ILLEGAL;
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return MODE_OK;
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}
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uint32_t intel_dp_pack_aux(const uint8_t *src, int src_bytes)
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{
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int i;
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uint32_t v = 0;
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if (src_bytes > 4)
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src_bytes = 4;
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for (i = 0; i < src_bytes; i++)
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v |= ((uint32_t) src[i]) << ((3-i) * 8);
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return v;
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}
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static void intel_dp_unpack_aux(uint32_t src, uint8_t *dst, int dst_bytes)
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{
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int i;
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if (dst_bytes > 4)
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dst_bytes = 4;
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for (i = 0; i < dst_bytes; i++)
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dst[i] = src >> ((3-i) * 8);
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}
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/* hrawclock is 1/4 the FSB frequency */
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static int
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intel_hrawclk(struct drm_device *dev)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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uint32_t clkcfg;
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/* There is no CLKCFG reg in Valleyview. VLV hrawclk is 200 MHz */
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if (IS_VALLEYVIEW(dev))
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return 200;
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clkcfg = I915_READ(CLKCFG);
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switch (clkcfg & CLKCFG_FSB_MASK) {
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case CLKCFG_FSB_400:
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return 100;
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case CLKCFG_FSB_533:
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return 133;
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case CLKCFG_FSB_667:
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return 166;
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case CLKCFG_FSB_800:
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return 200;
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case CLKCFG_FSB_1067:
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return 266;
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case CLKCFG_FSB_1333:
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return 333;
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/* these two are just a guess; one of them might be right */
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case CLKCFG_FSB_1600:
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case CLKCFG_FSB_1600_ALT:
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return 400;
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default:
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return 133;
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}
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}
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static void
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intel_dp_init_panel_power_sequencer(struct drm_device *dev,
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struct intel_dp *intel_dp);
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static void
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intel_dp_init_panel_power_sequencer_registers(struct drm_device *dev,
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struct intel_dp *intel_dp);
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static void pps_lock(struct intel_dp *intel_dp)
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{
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struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
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struct intel_encoder *encoder = &intel_dig_port->base;
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struct drm_device *dev = encoder->base.dev;
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struct drm_i915_private *dev_priv = dev->dev_private;
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enum intel_display_power_domain power_domain;
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/*
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* See vlv_power_sequencer_reset() why we need
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* a power domain reference here.
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*/
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power_domain = intel_display_port_power_domain(encoder);
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intel_display_power_get(dev_priv, power_domain);
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mutex_lock(&dev_priv->pps_mutex);
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}
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static void pps_unlock(struct intel_dp *intel_dp)
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{
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struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
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struct intel_encoder *encoder = &intel_dig_port->base;
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struct drm_device *dev = encoder->base.dev;
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struct drm_i915_private *dev_priv = dev->dev_private;
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enum intel_display_power_domain power_domain;
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mutex_unlock(&dev_priv->pps_mutex);
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power_domain = intel_display_port_power_domain(encoder);
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intel_display_power_put(dev_priv, power_domain);
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}
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static void
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vlv_power_sequencer_kick(struct intel_dp *intel_dp)
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{
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struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
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struct drm_device *dev = intel_dig_port->base.base.dev;
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struct drm_i915_private *dev_priv = dev->dev_private;
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enum pipe pipe = intel_dp->pps_pipe;
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bool pll_enabled;
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uint32_t DP;
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if (WARN(I915_READ(intel_dp->output_reg) & DP_PORT_EN,
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"skipping pipe %c power seqeuncer kick due to port %c being active\n",
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pipe_name(pipe), port_name(intel_dig_port->port)))
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return;
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DRM_DEBUG_KMS("kicking pipe %c power sequencer for port %c\n",
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pipe_name(pipe), port_name(intel_dig_port->port));
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/* Preserve the BIOS-computed detected bit. This is
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* supposed to be read-only.
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*/
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DP = I915_READ(intel_dp->output_reg) & DP_DETECTED;
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DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0;
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DP |= DP_PORT_WIDTH(1);
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DP |= DP_LINK_TRAIN_PAT_1;
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if (IS_CHERRYVIEW(dev))
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DP |= DP_PIPE_SELECT_CHV(pipe);
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else if (pipe == PIPE_B)
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DP |= DP_PIPEB_SELECT;
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pll_enabled = I915_READ(DPLL(pipe)) & DPLL_VCO_ENABLE;
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/*
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* The DPLL for the pipe must be enabled for this to work.
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* So enable temporarily it if it's not already enabled.
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*/
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if (!pll_enabled)
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vlv_force_pll_on(dev, pipe, IS_CHERRYVIEW(dev) ?
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&chv_dpll[0].dpll : &vlv_dpll[0].dpll);
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/*
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* Similar magic as in intel_dp_enable_port().
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* We _must_ do this port enable + disable trick
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* to make this power seqeuencer lock onto the port.
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* Otherwise even VDD force bit won't work.
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*/
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I915_WRITE(intel_dp->output_reg, DP);
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POSTING_READ(intel_dp->output_reg);
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I915_WRITE(intel_dp->output_reg, DP | DP_PORT_EN);
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POSTING_READ(intel_dp->output_reg);
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I915_WRITE(intel_dp->output_reg, DP & ~DP_PORT_EN);
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POSTING_READ(intel_dp->output_reg);
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if (!pll_enabled)
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vlv_force_pll_off(dev, pipe);
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}
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|
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static enum pipe
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vlv_power_sequencer_pipe(struct intel_dp *intel_dp)
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{
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struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
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struct drm_device *dev = intel_dig_port->base.base.dev;
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struct drm_i915_private *dev_priv = dev->dev_private;
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struct intel_encoder *encoder;
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unsigned int pipes = (1 << PIPE_A) | (1 << PIPE_B);
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enum pipe pipe;
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lockdep_assert_held(&dev_priv->pps_mutex);
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|
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/* We should never land here with regular DP ports */
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WARN_ON(!is_edp(intel_dp));
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if (intel_dp->pps_pipe != INVALID_PIPE)
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return intel_dp->pps_pipe;
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/*
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* We don't have power sequencer currently.
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* Pick one that's not used by other ports.
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*/
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list_for_each_entry(encoder, &dev->mode_config.encoder_list,
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base.head) {
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struct intel_dp *tmp;
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|
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if (encoder->type != INTEL_OUTPUT_EDP)
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continue;
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|
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tmp = enc_to_intel_dp(&encoder->base);
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|
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if (tmp->pps_pipe != INVALID_PIPE)
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pipes &= ~(1 << tmp->pps_pipe);
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}
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|
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/*
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* Didn't find one. This should not happen since there
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* are two power sequencers and up to two eDP ports.
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*/
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if (WARN_ON(pipes == 0))
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pipe = PIPE_A;
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else
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pipe = ffs(pipes) - 1;
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|
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vlv_steal_power_sequencer(dev, pipe);
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intel_dp->pps_pipe = pipe;
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|
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DRM_DEBUG_KMS("picked pipe %c power sequencer for port %c\n",
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pipe_name(intel_dp->pps_pipe),
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port_name(intel_dig_port->port));
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|
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/* init power sequencer on this pipe and port */
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intel_dp_init_panel_power_sequencer(dev, intel_dp);
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intel_dp_init_panel_power_sequencer_registers(dev, intel_dp);
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|
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/*
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* Even vdd force doesn't work until we've made
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* the power sequencer lock in on the port.
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*/
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vlv_power_sequencer_kick(intel_dp);
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|
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return intel_dp->pps_pipe;
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}
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|
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typedef bool (*vlv_pipe_check)(struct drm_i915_private *dev_priv,
|
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enum pipe pipe);
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|
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static bool vlv_pipe_has_pp_on(struct drm_i915_private *dev_priv,
|
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enum pipe pipe)
|
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{
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return I915_READ(VLV_PIPE_PP_STATUS(pipe)) & PP_ON;
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}
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|
|
static bool vlv_pipe_has_vdd_on(struct drm_i915_private *dev_priv,
|
|
enum pipe pipe)
|
|
{
|
|
return I915_READ(VLV_PIPE_PP_CONTROL(pipe)) & EDP_FORCE_VDD;
|
|
}
|
|
|
|
static bool vlv_pipe_any(struct drm_i915_private *dev_priv,
|
|
enum pipe pipe)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
static enum pipe
|
|
vlv_initial_pps_pipe(struct drm_i915_private *dev_priv,
|
|
enum port port,
|
|
vlv_pipe_check pipe_check)
|
|
{
|
|
enum pipe pipe;
|
|
|
|
for (pipe = PIPE_A; pipe <= PIPE_B; pipe++) {
|
|
u32 port_sel = I915_READ(VLV_PIPE_PP_ON_DELAYS(pipe)) &
|
|
PANEL_PORT_SELECT_MASK;
|
|
|
|
if (port_sel != PANEL_PORT_SELECT_VLV(port))
|
|
continue;
|
|
|
|
if (!pipe_check(dev_priv, pipe))
|
|
continue;
|
|
|
|
return pipe;
|
|
}
|
|
|
|
return INVALID_PIPE;
|
|
}
|
|
|
|
static void
|
|
vlv_initial_power_sequencer_setup(struct intel_dp *intel_dp)
|
|
{
|
|
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
|
|
struct drm_device *dev = intel_dig_port->base.base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
enum port port = intel_dig_port->port;
|
|
|
|
lockdep_assert_held(&dev_priv->pps_mutex);
|
|
|
|
/* try to find a pipe with this port selected */
|
|
/* first pick one where the panel is on */
|
|
intel_dp->pps_pipe = vlv_initial_pps_pipe(dev_priv, port,
|
|
vlv_pipe_has_pp_on);
|
|
/* didn't find one? pick one where vdd is on */
|
|
if (intel_dp->pps_pipe == INVALID_PIPE)
|
|
intel_dp->pps_pipe = vlv_initial_pps_pipe(dev_priv, port,
|
|
vlv_pipe_has_vdd_on);
|
|
/* didn't find one? pick one with just the correct port */
|
|
if (intel_dp->pps_pipe == INVALID_PIPE)
|
|
intel_dp->pps_pipe = vlv_initial_pps_pipe(dev_priv, port,
|
|
vlv_pipe_any);
|
|
|
|
/* didn't find one? just let vlv_power_sequencer_pipe() pick one when needed */
|
|
if (intel_dp->pps_pipe == INVALID_PIPE) {
|
|
DRM_DEBUG_KMS("no initial power sequencer for port %c\n",
|
|
port_name(port));
|
|
return;
|
|
}
|
|
|
|
DRM_DEBUG_KMS("initial power sequencer for port %c: pipe %c\n",
|
|
port_name(port), pipe_name(intel_dp->pps_pipe));
|
|
|
|
intel_dp_init_panel_power_sequencer(dev, intel_dp);
|
|
intel_dp_init_panel_power_sequencer_registers(dev, intel_dp);
|
|
}
|
|
|
|
void vlv_power_sequencer_reset(struct drm_i915_private *dev_priv)
|
|
{
|
|
struct drm_device *dev = dev_priv->dev;
|
|
struct intel_encoder *encoder;
|
|
|
|
if (WARN_ON(!IS_VALLEYVIEW(dev)))
|
|
return;
|
|
|
|
/*
|
|
* We can't grab pps_mutex here due to deadlock with power_domain
|
|
* mutex when power_domain functions are called while holding pps_mutex.
|
|
* That also means that in order to use pps_pipe the code needs to
|
|
* hold both a power domain reference and pps_mutex, and the power domain
|
|
* reference get/put must be done while _not_ holding pps_mutex.
|
|
* pps_{lock,unlock}() do these steps in the correct order, so one
|
|
* should use them always.
|
|
*/
|
|
|
|
list_for_each_entry(encoder, &dev->mode_config.encoder_list, base.head) {
|
|
struct intel_dp *intel_dp;
|
|
|
|
if (encoder->type != INTEL_OUTPUT_EDP)
|
|
continue;
|
|
|
|
intel_dp = enc_to_intel_dp(&encoder->base);
|
|
intel_dp->pps_pipe = INVALID_PIPE;
|
|
}
|
|
}
|
|
|
|
static u32 _pp_ctrl_reg(struct intel_dp *intel_dp)
|
|
{
|
|
struct drm_device *dev = intel_dp_to_dev(intel_dp);
|
|
|
|
if (HAS_PCH_SPLIT(dev))
|
|
return PCH_PP_CONTROL;
|
|
else
|
|
return VLV_PIPE_PP_CONTROL(vlv_power_sequencer_pipe(intel_dp));
|
|
}
|
|
|
|
static u32 _pp_stat_reg(struct intel_dp *intel_dp)
|
|
{
|
|
struct drm_device *dev = intel_dp_to_dev(intel_dp);
|
|
|
|
if (HAS_PCH_SPLIT(dev))
|
|
return PCH_PP_STATUS;
|
|
else
|
|
return VLV_PIPE_PP_STATUS(vlv_power_sequencer_pipe(intel_dp));
|
|
}
|
|
|
|
/* Reboot notifier handler to shutdown panel power to guarantee T12 timing
|
|
This function only applicable when panel PM state is not to be tracked */
|
|
static int edp_notify_handler(struct notifier_block *this, unsigned long code,
|
|
void *unused)
|
|
{
|
|
struct intel_dp *intel_dp = container_of(this, typeof(* intel_dp),
|
|
edp_notifier);
|
|
struct drm_device *dev = intel_dp_to_dev(intel_dp);
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
u32 pp_div;
|
|
u32 pp_ctrl_reg, pp_div_reg;
|
|
|
|
if (!is_edp(intel_dp) || code != SYS_RESTART)
|
|
return 0;
|
|
|
|
pps_lock(intel_dp);
|
|
|
|
if (IS_VALLEYVIEW(dev)) {
|
|
enum pipe pipe = vlv_power_sequencer_pipe(intel_dp);
|
|
|
|
pp_ctrl_reg = VLV_PIPE_PP_CONTROL(pipe);
|
|
pp_div_reg = VLV_PIPE_PP_DIVISOR(pipe);
|
|
pp_div = I915_READ(pp_div_reg);
|
|
pp_div &= PP_REFERENCE_DIVIDER_MASK;
|
|
|
|
/* 0x1F write to PP_DIV_REG sets max cycle delay */
|
|
I915_WRITE(pp_div_reg, pp_div | 0x1F);
|
|
I915_WRITE(pp_ctrl_reg, PANEL_UNLOCK_REGS | PANEL_POWER_OFF);
|
|
msleep(intel_dp->panel_power_cycle_delay);
|
|
}
|
|
|
|
pps_unlock(intel_dp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool edp_have_panel_power(struct intel_dp *intel_dp)
|
|
{
|
|
struct drm_device *dev = intel_dp_to_dev(intel_dp);
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
|
|
lockdep_assert_held(&dev_priv->pps_mutex);
|
|
|
|
if (IS_VALLEYVIEW(dev) &&
|
|
intel_dp->pps_pipe == INVALID_PIPE)
|
|
return false;
|
|
|
|
return (I915_READ(_pp_stat_reg(intel_dp)) & PP_ON) != 0;
|
|
}
|
|
|
|
static bool edp_have_panel_vdd(struct intel_dp *intel_dp)
|
|
{
|
|
struct drm_device *dev = intel_dp_to_dev(intel_dp);
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
|
|
lockdep_assert_held(&dev_priv->pps_mutex);
|
|
|
|
if (IS_VALLEYVIEW(dev) &&
|
|
intel_dp->pps_pipe == INVALID_PIPE)
|
|
return false;
|
|
|
|
return I915_READ(_pp_ctrl_reg(intel_dp)) & EDP_FORCE_VDD;
|
|
}
|
|
|
|
static void
|
|
intel_dp_check_edp(struct intel_dp *intel_dp)
|
|
{
|
|
struct drm_device *dev = intel_dp_to_dev(intel_dp);
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
|
|
if (!is_edp(intel_dp))
|
|
return;
|
|
|
|
if (!edp_have_panel_power(intel_dp) && !edp_have_panel_vdd(intel_dp)) {
|
|
WARN(1, "eDP powered off while attempting aux channel communication.\n");
|
|
DRM_DEBUG_KMS("Status 0x%08x Control 0x%08x\n",
|
|
I915_READ(_pp_stat_reg(intel_dp)),
|
|
I915_READ(_pp_ctrl_reg(intel_dp)));
|
|
}
|
|
}
|
|
|
|
static uint32_t
|
|
intel_dp_aux_wait_done(struct intel_dp *intel_dp, bool has_aux_irq)
|
|
{
|
|
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
|
|
struct drm_device *dev = intel_dig_port->base.base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
uint32_t ch_ctl = intel_dp->aux_ch_ctl_reg;
|
|
uint32_t status;
|
|
bool done;
|
|
|
|
#define C (((status = I915_READ_NOTRACE(ch_ctl)) & DP_AUX_CH_CTL_SEND_BUSY) == 0)
|
|
if (has_aux_irq)
|
|
done = wait_event_timeout(dev_priv->gmbus_wait_queue, C,
|
|
msecs_to_jiffies_timeout(10));
|
|
else
|
|
done = wait_for_atomic(C, 10) == 0;
|
|
if (!done)
|
|
DRM_ERROR("dp aux hw did not signal timeout (has irq: %i)!\n",
|
|
has_aux_irq);
|
|
#undef C
|
|
|
|
return status;
|
|
}
|
|
|
|
static uint32_t i9xx_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
|
|
{
|
|
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
|
|
struct drm_device *dev = intel_dig_port->base.base.dev;
|
|
|
|
/*
|
|
* The clock divider is based off the hrawclk, and would like to run at
|
|
* 2MHz. So, take the hrawclk value and divide by 2 and use that
|
|
*/
|
|
return index ? 0 : intel_hrawclk(dev) / 2;
|
|
}
|
|
|
|
static uint32_t ilk_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
|
|
{
|
|
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
|
|
struct drm_device *dev = intel_dig_port->base.base.dev;
|
|
|
|
if (index)
|
|
return 0;
|
|
|
|
if (intel_dig_port->port == PORT_A) {
|
|
if (IS_GEN6(dev) || IS_GEN7(dev))
|
|
return 200; /* SNB & IVB eDP input clock at 400Mhz */
|
|
else
|
|
return 225; /* eDP input clock at 450Mhz */
|
|
} else {
|
|
return DIV_ROUND_UP(intel_pch_rawclk(dev), 2);
|
|
}
|
|
}
|
|
|
|
static uint32_t hsw_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
|
|
{
|
|
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
|
|
struct drm_device *dev = intel_dig_port->base.base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
|
|
if (intel_dig_port->port == PORT_A) {
|
|
if (index)
|
|
return 0;
|
|
return DIV_ROUND_CLOSEST(intel_ddi_get_cdclk_freq(dev_priv), 2000);
|
|
} else if (dev_priv->pch_id == INTEL_PCH_LPT_DEVICE_ID_TYPE) {
|
|
/* Workaround for non-ULT HSW */
|
|
switch (index) {
|
|
case 0: return 63;
|
|
case 1: return 72;
|
|
default: return 0;
|
|
}
|
|
} else {
|
|
return index ? 0 : DIV_ROUND_UP(intel_pch_rawclk(dev), 2);
|
|
}
|
|
}
|
|
|
|
static uint32_t vlv_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
|
|
{
|
|
return index ? 0 : 100;
|
|
}
|
|
|
|
static uint32_t skl_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
|
|
{
|
|
/*
|
|
* SKL doesn't need us to program the AUX clock divider (Hardware will
|
|
* derive the clock from CDCLK automatically). We still implement the
|
|
* get_aux_clock_divider vfunc to plug-in into the existing code.
|
|
*/
|
|
return index ? 0 : 1;
|
|
}
|
|
|
|
static uint32_t i9xx_get_aux_send_ctl(struct intel_dp *intel_dp,
|
|
bool has_aux_irq,
|
|
int send_bytes,
|
|
uint32_t aux_clock_divider)
|
|
{
|
|
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
|
|
struct drm_device *dev = intel_dig_port->base.base.dev;
|
|
uint32_t precharge, timeout;
|
|
|
|
if (IS_GEN6(dev))
|
|
precharge = 3;
|
|
else
|
|
precharge = 5;
|
|
|
|
if (IS_BROADWELL(dev) && intel_dp->aux_ch_ctl_reg == DPA_AUX_CH_CTL)
|
|
timeout = DP_AUX_CH_CTL_TIME_OUT_600us;
|
|
else
|
|
timeout = DP_AUX_CH_CTL_TIME_OUT_400us;
|
|
|
|
return DP_AUX_CH_CTL_SEND_BUSY |
|
|
DP_AUX_CH_CTL_DONE |
|
|
(has_aux_irq ? DP_AUX_CH_CTL_INTERRUPT : 0) |
|
|
DP_AUX_CH_CTL_TIME_OUT_ERROR |
|
|
timeout |
|
|
DP_AUX_CH_CTL_RECEIVE_ERROR |
|
|
(send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) |
|
|
(precharge << DP_AUX_CH_CTL_PRECHARGE_2US_SHIFT) |
|
|
(aux_clock_divider << DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT);
|
|
}
|
|
|
|
static uint32_t skl_get_aux_send_ctl(struct intel_dp *intel_dp,
|
|
bool has_aux_irq,
|
|
int send_bytes,
|
|
uint32_t unused)
|
|
{
|
|
return DP_AUX_CH_CTL_SEND_BUSY |
|
|
DP_AUX_CH_CTL_DONE |
|
|
(has_aux_irq ? DP_AUX_CH_CTL_INTERRUPT : 0) |
|
|
DP_AUX_CH_CTL_TIME_OUT_ERROR |
|
|
DP_AUX_CH_CTL_TIME_OUT_1600us |
|
|
DP_AUX_CH_CTL_RECEIVE_ERROR |
|
|
(send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) |
|
|
DP_AUX_CH_CTL_SYNC_PULSE_SKL(32);
|
|
}
|
|
|
|
static int
|
|
intel_dp_aux_ch(struct intel_dp *intel_dp,
|
|
const uint8_t *send, int send_bytes,
|
|
uint8_t *recv, int recv_size)
|
|
{
|
|
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
|
|
struct drm_device *dev = intel_dig_port->base.base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
uint32_t ch_ctl = intel_dp->aux_ch_ctl_reg;
|
|
uint32_t ch_data = ch_ctl + 4;
|
|
uint32_t aux_clock_divider;
|
|
int i, ret, recv_bytes;
|
|
uint32_t status;
|
|
int try, clock = 0;
|
|
bool has_aux_irq = HAS_AUX_IRQ(dev);
|
|
bool vdd;
|
|
|
|
pps_lock(intel_dp);
|
|
|
|
/*
|
|
* We will be called with VDD already enabled for dpcd/edid/oui reads.
|
|
* In such cases we want to leave VDD enabled and it's up to upper layers
|
|
* to turn it off. But for eg. i2c-dev access we need to turn it on/off
|
|
* ourselves.
|
|
*/
|
|
vdd = edp_panel_vdd_on(intel_dp);
|
|
|
|
/* dp aux is extremely sensitive to irq latency, hence request the
|
|
* lowest possible wakeup latency and so prevent the cpu from going into
|
|
* deep sleep states.
|
|
*/
|
|
pm_qos_update_request(&dev_priv->pm_qos, 0);
|
|
|
|
intel_dp_check_edp(intel_dp);
|
|
|
|
intel_aux_display_runtime_get(dev_priv);
|
|
|
|
/* Try to wait for any previous AUX channel activity */
|
|
for (try = 0; try < 3; try++) {
|
|
status = I915_READ_NOTRACE(ch_ctl);
|
|
if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0)
|
|
break;
|
|
msleep(1);
|
|
}
|
|
|
|
if (try == 3) {
|
|
WARN(1, "dp_aux_ch not started status 0x%08x\n",
|
|
I915_READ(ch_ctl));
|
|
ret = -EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
/* Only 5 data registers! */
|
|
if (WARN_ON(send_bytes > 20 || recv_size > 20)) {
|
|
ret = -E2BIG;
|
|
goto out;
|
|
}
|
|
|
|
while ((aux_clock_divider = intel_dp->get_aux_clock_divider(intel_dp, clock++))) {
|
|
u32 send_ctl = intel_dp->get_aux_send_ctl(intel_dp,
|
|
has_aux_irq,
|
|
send_bytes,
|
|
aux_clock_divider);
|
|
|
|
/* Must try at least 3 times according to DP spec */
|
|
for (try = 0; try < 5; try++) {
|
|
/* Load the send data into the aux channel data registers */
|
|
for (i = 0; i < send_bytes; i += 4)
|
|
I915_WRITE(ch_data + i,
|
|
intel_dp_pack_aux(send + i,
|
|
send_bytes - i));
|
|
|
|
/* Send the command and wait for it to complete */
|
|
I915_WRITE(ch_ctl, send_ctl);
|
|
|
|
status = intel_dp_aux_wait_done(intel_dp, has_aux_irq);
|
|
|
|
/* Clear done status and any errors */
|
|
I915_WRITE(ch_ctl,
|
|
status |
|
|
DP_AUX_CH_CTL_DONE |
|
|
DP_AUX_CH_CTL_TIME_OUT_ERROR |
|
|
DP_AUX_CH_CTL_RECEIVE_ERROR);
|
|
|
|
if (status & (DP_AUX_CH_CTL_TIME_OUT_ERROR |
|
|
DP_AUX_CH_CTL_RECEIVE_ERROR))
|
|
continue;
|
|
if (status & DP_AUX_CH_CTL_DONE)
|
|
break;
|
|
}
|
|
if (status & DP_AUX_CH_CTL_DONE)
|
|
break;
|
|
}
|
|
|
|
if ((status & DP_AUX_CH_CTL_DONE) == 0) {
|
|
DRM_ERROR("dp_aux_ch not done status 0x%08x\n", status);
|
|
ret = -EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
/* Check for timeout or receive error.
|
|
* Timeouts occur when the sink is not connected
|
|
*/
|
|
if (status & DP_AUX_CH_CTL_RECEIVE_ERROR) {
|
|
DRM_ERROR("dp_aux_ch receive error status 0x%08x\n", status);
|
|
ret = -EIO;
|
|
goto out;
|
|
}
|
|
|
|
/* Timeouts occur when the device isn't connected, so they're
|
|
* "normal" -- don't fill the kernel log with these */
|
|
if (status & DP_AUX_CH_CTL_TIME_OUT_ERROR) {
|
|
DRM_DEBUG_KMS("dp_aux_ch timeout status 0x%08x\n", status);
|
|
ret = -ETIMEDOUT;
|
|
goto out;
|
|
}
|
|
|
|
/* Unload any bytes sent back from the other side */
|
|
recv_bytes = ((status & DP_AUX_CH_CTL_MESSAGE_SIZE_MASK) >>
|
|
DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT);
|
|
if (recv_bytes > recv_size)
|
|
recv_bytes = recv_size;
|
|
|
|
for (i = 0; i < recv_bytes; i += 4)
|
|
intel_dp_unpack_aux(I915_READ(ch_data + i),
|
|
recv + i, recv_bytes - i);
|
|
|
|
ret = recv_bytes;
|
|
out:
|
|
pm_qos_update_request(&dev_priv->pm_qos, PM_QOS_DEFAULT_VALUE);
|
|
intel_aux_display_runtime_put(dev_priv);
|
|
|
|
if (vdd)
|
|
edp_panel_vdd_off(intel_dp, false);
|
|
|
|
pps_unlock(intel_dp);
|
|
|
|
return ret;
|
|
}
|
|
|
|
#define BARE_ADDRESS_SIZE 3
|
|
#define HEADER_SIZE (BARE_ADDRESS_SIZE + 1)
|
|
static ssize_t
|
|
intel_dp_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
|
|
{
|
|
struct intel_dp *intel_dp = container_of(aux, struct intel_dp, aux);
|
|
uint8_t txbuf[20], rxbuf[20];
|
|
size_t txsize, rxsize;
|
|
int ret;
|
|
|
|
txbuf[0] = (msg->request << 4) |
|
|
((msg->address >> 16) & 0xf);
|
|
txbuf[1] = (msg->address >> 8) & 0xff;
|
|
txbuf[2] = msg->address & 0xff;
|
|
txbuf[3] = msg->size - 1;
|
|
|
|
switch (msg->request & ~DP_AUX_I2C_MOT) {
|
|
case DP_AUX_NATIVE_WRITE:
|
|
case DP_AUX_I2C_WRITE:
|
|
txsize = msg->size ? HEADER_SIZE + msg->size : BARE_ADDRESS_SIZE;
|
|
rxsize = 2; /* 0 or 1 data bytes */
|
|
|
|
if (WARN_ON(txsize > 20))
|
|
return -E2BIG;
|
|
|
|
memcpy(txbuf + HEADER_SIZE, msg->buffer, msg->size);
|
|
|
|
ret = intel_dp_aux_ch(intel_dp, txbuf, txsize, rxbuf, rxsize);
|
|
if (ret > 0) {
|
|
msg->reply = rxbuf[0] >> 4;
|
|
|
|
if (ret > 1) {
|
|
/* Number of bytes written in a short write. */
|
|
ret = clamp_t(int, rxbuf[1], 0, msg->size);
|
|
} else {
|
|
/* Return payload size. */
|
|
ret = msg->size;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case DP_AUX_NATIVE_READ:
|
|
case DP_AUX_I2C_READ:
|
|
txsize = msg->size ? HEADER_SIZE : BARE_ADDRESS_SIZE;
|
|
rxsize = msg->size + 1;
|
|
|
|
if (WARN_ON(rxsize > 20))
|
|
return -E2BIG;
|
|
|
|
ret = intel_dp_aux_ch(intel_dp, txbuf, txsize, rxbuf, rxsize);
|
|
if (ret > 0) {
|
|
msg->reply = rxbuf[0] >> 4;
|
|
/*
|
|
* Assume happy day, and copy the data. The caller is
|
|
* expected to check msg->reply before touching it.
|
|
*
|
|
* Return payload size.
|
|
*/
|
|
ret--;
|
|
memcpy(msg->buffer, rxbuf + 1, ret);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
intel_dp_aux_init(struct intel_dp *intel_dp, struct intel_connector *connector)
|
|
{
|
|
struct drm_device *dev = intel_dp_to_dev(intel_dp);
|
|
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
|
|
enum port port = intel_dig_port->port;
|
|
const char *name = NULL;
|
|
int ret;
|
|
|
|
switch (port) {
|
|
case PORT_A:
|
|
intel_dp->aux_ch_ctl_reg = DPA_AUX_CH_CTL;
|
|
name = "DPDDC-A";
|
|
break;
|
|
case PORT_B:
|
|
intel_dp->aux_ch_ctl_reg = PCH_DPB_AUX_CH_CTL;
|
|
name = "DPDDC-B";
|
|
break;
|
|
case PORT_C:
|
|
intel_dp->aux_ch_ctl_reg = PCH_DPC_AUX_CH_CTL;
|
|
name = "DPDDC-C";
|
|
break;
|
|
case PORT_D:
|
|
intel_dp->aux_ch_ctl_reg = PCH_DPD_AUX_CH_CTL;
|
|
name = "DPDDC-D";
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
|
|
/*
|
|
* The AUX_CTL register is usually DP_CTL + 0x10.
|
|
*
|
|
* On Haswell and Broadwell though:
|
|
* - Both port A DDI_BUF_CTL and DDI_AUX_CTL are on the CPU
|
|
* - Port B/C/D AUX channels are on the PCH, DDI_BUF_CTL on the CPU
|
|
*
|
|
* Skylake moves AUX_CTL back next to DDI_BUF_CTL, on the CPU.
|
|
*/
|
|
if (!IS_HASWELL(dev) && !IS_BROADWELL(dev))
|
|
intel_dp->aux_ch_ctl_reg = intel_dp->output_reg + 0x10;
|
|
|
|
intel_dp->aux.name = name;
|
|
intel_dp->aux.dev = dev->dev;
|
|
intel_dp->aux.transfer = intel_dp_aux_transfer;
|
|
|
|
DRM_DEBUG_KMS("registering %s bus for %s\n", name,
|
|
connector->base.kdev->kobj.name);
|
|
|
|
ret = drm_dp_aux_register(&intel_dp->aux);
|
|
if (ret < 0) {
|
|
DRM_ERROR("drm_dp_aux_register() for %s failed (%d)\n",
|
|
name, ret);
|
|
return;
|
|
}
|
|
|
|
ret = sysfs_create_link(&connector->base.kdev->kobj,
|
|
&intel_dp->aux.ddc.dev.kobj,
|
|
intel_dp->aux.ddc.dev.kobj.name);
|
|
if (ret < 0) {
|
|
DRM_ERROR("sysfs_create_link() for %s failed (%d)\n", name, ret);
|
|
drm_dp_aux_unregister(&intel_dp->aux);
|
|
}
|
|
}
|
|
|
|
static void
|
|
intel_dp_connector_unregister(struct intel_connector *intel_connector)
|
|
{
|
|
struct intel_dp *intel_dp = intel_attached_dp(&intel_connector->base);
|
|
|
|
if (!intel_connector->mst_port)
|
|
sysfs_remove_link(&intel_connector->base.kdev->kobj,
|
|
intel_dp->aux.ddc.dev.kobj.name);
|
|
intel_connector_unregister(intel_connector);
|
|
}
|
|
|
|
static void
|
|
skl_edp_set_pll_config(struct intel_crtc_state *pipe_config, int link_clock)
|
|
{
|
|
u32 ctrl1;
|
|
|
|
pipe_config->ddi_pll_sel = SKL_DPLL0;
|
|
pipe_config->dpll_hw_state.cfgcr1 = 0;
|
|
pipe_config->dpll_hw_state.cfgcr2 = 0;
|
|
|
|
ctrl1 = DPLL_CTRL1_OVERRIDE(SKL_DPLL0);
|
|
switch (link_clock / 2) {
|
|
case 81000:
|
|
ctrl1 |= DPLL_CRTL1_LINK_RATE(DPLL_CRTL1_LINK_RATE_810,
|
|
SKL_DPLL0);
|
|
break;
|
|
case 135000:
|
|
ctrl1 |= DPLL_CRTL1_LINK_RATE(DPLL_CRTL1_LINK_RATE_1350,
|
|
SKL_DPLL0);
|
|
break;
|
|
case 270000:
|
|
ctrl1 |= DPLL_CRTL1_LINK_RATE(DPLL_CRTL1_LINK_RATE_2700,
|
|
SKL_DPLL0);
|
|
break;
|
|
case 162000:
|
|
ctrl1 |= DPLL_CRTL1_LINK_RATE(DPLL_CRTL1_LINK_RATE_1620,
|
|
SKL_DPLL0);
|
|
break;
|
|
/* TBD: For DP link rates 2.16 GHz and 4.32 GHz, VCO is 8640 which
|
|
results in CDCLK change. Need to handle the change of CDCLK by
|
|
disabling pipes and re-enabling them */
|
|
case 108000:
|
|
ctrl1 |= DPLL_CRTL1_LINK_RATE(DPLL_CRTL1_LINK_RATE_1080,
|
|
SKL_DPLL0);
|
|
break;
|
|
case 216000:
|
|
ctrl1 |= DPLL_CRTL1_LINK_RATE(DPLL_CRTL1_LINK_RATE_2160,
|
|
SKL_DPLL0);
|
|
break;
|
|
|
|
}
|
|
pipe_config->dpll_hw_state.ctrl1 = ctrl1;
|
|
}
|
|
|
|
static void
|
|
hsw_dp_set_ddi_pll_sel(struct intel_crtc_state *pipe_config, int link_bw)
|
|
{
|
|
switch (link_bw) {
|
|
case DP_LINK_BW_1_62:
|
|
pipe_config->ddi_pll_sel = PORT_CLK_SEL_LCPLL_810;
|
|
break;
|
|
case DP_LINK_BW_2_7:
|
|
pipe_config->ddi_pll_sel = PORT_CLK_SEL_LCPLL_1350;
|
|
break;
|
|
case DP_LINK_BW_5_4:
|
|
pipe_config->ddi_pll_sel = PORT_CLK_SEL_LCPLL_2700;
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int
|
|
intel_dp_sink_rates(struct intel_dp *intel_dp, const int **sink_rates)
|
|
{
|
|
if (intel_dp->num_sink_rates) {
|
|
*sink_rates = intel_dp->sink_rates;
|
|
return intel_dp->num_sink_rates;
|
|
}
|
|
|
|
*sink_rates = default_rates;
|
|
|
|
return (intel_dp_max_link_bw(intel_dp) >> 3) + 1;
|
|
}
|
|
|
|
static int
|
|
intel_dp_source_rates(struct drm_device *dev, const int **source_rates)
|
|
{
|
|
if (INTEL_INFO(dev)->gen >= 9) {
|
|
*source_rates = gen9_rates;
|
|
return ARRAY_SIZE(gen9_rates);
|
|
} else if (IS_CHERRYVIEW(dev)) {
|
|
*source_rates = chv_rates;
|
|
return ARRAY_SIZE(chv_rates);
|
|
}
|
|
|
|
*source_rates = default_rates;
|
|
|
|
if (IS_SKYLAKE(dev) && INTEL_REVID(dev) <= SKL_REVID_B0)
|
|
/* WaDisableHBR2:skl */
|
|
return (DP_LINK_BW_2_7 >> 3) + 1;
|
|
else if (INTEL_INFO(dev)->gen >= 8 ||
|
|
(IS_HASWELL(dev) && !IS_HSW_ULX(dev)))
|
|
return (DP_LINK_BW_5_4 >> 3) + 1;
|
|
else
|
|
return (DP_LINK_BW_2_7 >> 3) + 1;
|
|
}
|
|
|
|
static void
|
|
intel_dp_set_clock(struct intel_encoder *encoder,
|
|
struct intel_crtc_state *pipe_config, int link_bw)
|
|
{
|
|
struct drm_device *dev = encoder->base.dev;
|
|
const struct dp_link_dpll *divisor = NULL;
|
|
int i, count = 0;
|
|
|
|
if (IS_G4X(dev)) {
|
|
divisor = gen4_dpll;
|
|
count = ARRAY_SIZE(gen4_dpll);
|
|
} else if (HAS_PCH_SPLIT(dev)) {
|
|
divisor = pch_dpll;
|
|
count = ARRAY_SIZE(pch_dpll);
|
|
} else if (IS_CHERRYVIEW(dev)) {
|
|
divisor = chv_dpll;
|
|
count = ARRAY_SIZE(chv_dpll);
|
|
} else if (IS_VALLEYVIEW(dev)) {
|
|
divisor = vlv_dpll;
|
|
count = ARRAY_SIZE(vlv_dpll);
|
|
}
|
|
|
|
if (divisor && count) {
|
|
for (i = 0; i < count; i++) {
|
|
if (link_bw == divisor[i].link_bw) {
|
|
pipe_config->dpll = divisor[i].dpll;
|
|
pipe_config->clock_set = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static int intersect_rates(const int *source_rates, int source_len,
|
|
const int *sink_rates, int sink_len,
|
|
int *common_rates)
|
|
{
|
|
int i = 0, j = 0, k = 0;
|
|
|
|
while (i < source_len && j < sink_len) {
|
|
if (source_rates[i] == sink_rates[j]) {
|
|
if (WARN_ON(k >= DP_MAX_SUPPORTED_RATES))
|
|
return k;
|
|
common_rates[k] = source_rates[i];
|
|
++k;
|
|
++i;
|
|
++j;
|
|
} else if (source_rates[i] < sink_rates[j]) {
|
|
++i;
|
|
} else {
|
|
++j;
|
|
}
|
|
}
|
|
return k;
|
|
}
|
|
|
|
static int intel_dp_common_rates(struct intel_dp *intel_dp,
|
|
int *common_rates)
|
|
{
|
|
struct drm_device *dev = intel_dp_to_dev(intel_dp);
|
|
const int *source_rates, *sink_rates;
|
|
int source_len, sink_len;
|
|
|
|
sink_len = intel_dp_sink_rates(intel_dp, &sink_rates);
|
|
source_len = intel_dp_source_rates(dev, &source_rates);
|
|
|
|
return intersect_rates(source_rates, source_len,
|
|
sink_rates, sink_len,
|
|
common_rates);
|
|
}
|
|
|
|
static void snprintf_int_array(char *str, size_t len,
|
|
const int *array, int nelem)
|
|
{
|
|
int i;
|
|
|
|
str[0] = '\0';
|
|
|
|
for (i = 0; i < nelem; i++) {
|
|
int r = snprintf(str, len, "%d,", array[i]);
|
|
if (r >= len)
|
|
return;
|
|
str += r;
|
|
len -= r;
|
|
}
|
|
}
|
|
|
|
static void intel_dp_print_rates(struct intel_dp *intel_dp)
|
|
{
|
|
struct drm_device *dev = intel_dp_to_dev(intel_dp);
|
|
const int *source_rates, *sink_rates;
|
|
int source_len, sink_len, common_len;
|
|
int common_rates[DP_MAX_SUPPORTED_RATES];
|
|
char str[128]; /* FIXME: too big for stack? */
|
|
|
|
if ((drm_debug & DRM_UT_KMS) == 0)
|
|
return;
|
|
|
|
source_len = intel_dp_source_rates(dev, &source_rates);
|
|
snprintf_int_array(str, sizeof(str), source_rates, source_len);
|
|
DRM_DEBUG_KMS("source rates: %s\n", str);
|
|
|
|
sink_len = intel_dp_sink_rates(intel_dp, &sink_rates);
|
|
snprintf_int_array(str, sizeof(str), sink_rates, sink_len);
|
|
DRM_DEBUG_KMS("sink rates: %s\n", str);
|
|
|
|
common_len = intel_dp_common_rates(intel_dp, common_rates);
|
|
snprintf_int_array(str, sizeof(str), common_rates, common_len);
|
|
DRM_DEBUG_KMS("common rates: %s\n", str);
|
|
}
|
|
|
|
static int rate_to_index(int find, const int *rates)
|
|
{
|
|
int i = 0;
|
|
|
|
for (i = 0; i < DP_MAX_SUPPORTED_RATES; ++i)
|
|
if (find == rates[i])
|
|
break;
|
|
|
|
return i;
|
|
}
|
|
|
|
int
|
|
intel_dp_max_link_rate(struct intel_dp *intel_dp)
|
|
{
|
|
int rates[DP_MAX_SUPPORTED_RATES] = {};
|
|
int len;
|
|
|
|
len = intel_dp_common_rates(intel_dp, rates);
|
|
if (WARN_ON(len <= 0))
|
|
return 162000;
|
|
|
|
return rates[rate_to_index(0, rates) - 1];
|
|
}
|
|
|
|
int intel_dp_rate_select(struct intel_dp *intel_dp, int rate)
|
|
{
|
|
return rate_to_index(rate, intel_dp->sink_rates);
|
|
}
|
|
|
|
bool
|
|
intel_dp_compute_config(struct intel_encoder *encoder,
|
|
struct intel_crtc_state *pipe_config)
|
|
{
|
|
struct drm_device *dev = encoder->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
|
|
struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
|
|
enum port port = dp_to_dig_port(intel_dp)->port;
|
|
struct intel_crtc *intel_crtc = to_intel_crtc(pipe_config->base.crtc);
|
|
struct intel_connector *intel_connector = intel_dp->attached_connector;
|
|
int lane_count, clock;
|
|
int min_lane_count = 1;
|
|
int max_lane_count = intel_dp_max_lane_count(intel_dp);
|
|
/* Conveniently, the link BW constants become indices with a shift...*/
|
|
int min_clock = 0;
|
|
int max_clock;
|
|
int bpp, mode_rate;
|
|
int link_avail, link_clock;
|
|
int common_rates[DP_MAX_SUPPORTED_RATES] = {};
|
|
int common_len;
|
|
|
|
common_len = intel_dp_common_rates(intel_dp, common_rates);
|
|
|
|
/* No common link rates between source and sink */
|
|
WARN_ON(common_len <= 0);
|
|
|
|
max_clock = common_len - 1;
|
|
|
|
if (HAS_PCH_SPLIT(dev) && !HAS_DDI(dev) && port != PORT_A)
|
|
pipe_config->has_pch_encoder = true;
|
|
|
|
pipe_config->has_dp_encoder = true;
|
|
pipe_config->has_drrs = false;
|
|
pipe_config->has_audio = intel_dp->has_audio && port != PORT_A;
|
|
|
|
if (is_edp(intel_dp) && intel_connector->panel.fixed_mode) {
|
|
intel_fixed_panel_mode(intel_connector->panel.fixed_mode,
|
|
adjusted_mode);
|
|
if (!HAS_PCH_SPLIT(dev))
|
|
intel_gmch_panel_fitting(intel_crtc, pipe_config,
|
|
intel_connector->panel.fitting_mode);
|
|
else
|
|
intel_pch_panel_fitting(intel_crtc, pipe_config,
|
|
intel_connector->panel.fitting_mode);
|
|
}
|
|
|
|
if (adjusted_mode->flags & DRM_MODE_FLAG_DBLCLK)
|
|
return false;
|
|
|
|
DRM_DEBUG_KMS("DP link computation with max lane count %i "
|
|
"max bw %d pixel clock %iKHz\n",
|
|
max_lane_count, common_rates[max_clock],
|
|
adjusted_mode->crtc_clock);
|
|
|
|
/* Walk through all bpp values. Luckily they're all nicely spaced with 2
|
|
* bpc in between. */
|
|
bpp = pipe_config->pipe_bpp;
|
|
if (is_edp(intel_dp)) {
|
|
if (dev_priv->vbt.edp_bpp && dev_priv->vbt.edp_bpp < bpp) {
|
|
DRM_DEBUG_KMS("clamping bpp for eDP panel to BIOS-provided %i\n",
|
|
dev_priv->vbt.edp_bpp);
|
|
bpp = dev_priv->vbt.edp_bpp;
|
|
}
|
|
|
|
/*
|
|
* Use the maximum clock and number of lanes the eDP panel
|
|
* advertizes being capable of. The panels are generally
|
|
* designed to support only a single clock and lane
|
|
* configuration, and typically these values correspond to the
|
|
* native resolution of the panel.
|
|
*/
|
|
min_lane_count = max_lane_count;
|
|
min_clock = max_clock;
|
|
}
|
|
|
|
for (; bpp >= 6*3; bpp -= 2*3) {
|
|
mode_rate = intel_dp_link_required(adjusted_mode->crtc_clock,
|
|
bpp);
|
|
|
|
for (clock = min_clock; clock <= max_clock; clock++) {
|
|
for (lane_count = min_lane_count;
|
|
lane_count <= max_lane_count;
|
|
lane_count <<= 1) {
|
|
|
|
link_clock = common_rates[clock];
|
|
link_avail = intel_dp_max_data_rate(link_clock,
|
|
lane_count);
|
|
|
|
if (mode_rate <= link_avail) {
|
|
goto found;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return false;
|
|
|
|
found:
|
|
if (intel_dp->color_range_auto) {
|
|
/*
|
|
* See:
|
|
* CEA-861-E - 5.1 Default Encoding Parameters
|
|
* VESA DisplayPort Ver.1.2a - 5.1.1.1 Video Colorimetry
|
|
*/
|
|
if (bpp != 18 && drm_match_cea_mode(adjusted_mode) > 1)
|
|
intel_dp->color_range = DP_COLOR_RANGE_16_235;
|
|
else
|
|
intel_dp->color_range = 0;
|
|
}
|
|
|
|
if (intel_dp->color_range)
|
|
pipe_config->limited_color_range = true;
|
|
|
|
intel_dp->lane_count = lane_count;
|
|
|
|
if (intel_dp->num_sink_rates) {
|
|
intel_dp->link_bw = 0;
|
|
intel_dp->rate_select =
|
|
intel_dp_rate_select(intel_dp, common_rates[clock]);
|
|
} else {
|
|
intel_dp->link_bw =
|
|
drm_dp_link_rate_to_bw_code(common_rates[clock]);
|
|
intel_dp->rate_select = 0;
|
|
}
|
|
|
|
pipe_config->pipe_bpp = bpp;
|
|
pipe_config->port_clock = common_rates[clock];
|
|
|
|
DRM_DEBUG_KMS("DP link bw %02x lane count %d clock %d bpp %d\n",
|
|
intel_dp->link_bw, intel_dp->lane_count,
|
|
pipe_config->port_clock, bpp);
|
|
DRM_DEBUG_KMS("DP link bw required %i available %i\n",
|
|
mode_rate, link_avail);
|
|
|
|
intel_link_compute_m_n(bpp, lane_count,
|
|
adjusted_mode->crtc_clock,
|
|
pipe_config->port_clock,
|
|
&pipe_config->dp_m_n);
|
|
|
|
if (intel_connector->panel.downclock_mode != NULL &&
|
|
dev_priv->drrs.type == SEAMLESS_DRRS_SUPPORT) {
|
|
pipe_config->has_drrs = true;
|
|
intel_link_compute_m_n(bpp, lane_count,
|
|
intel_connector->panel.downclock_mode->clock,
|
|
pipe_config->port_clock,
|
|
&pipe_config->dp_m2_n2);
|
|
}
|
|
|
|
if (IS_SKYLAKE(dev) && is_edp(intel_dp))
|
|
skl_edp_set_pll_config(pipe_config, common_rates[clock]);
|
|
else if (IS_HASWELL(dev) || IS_BROADWELL(dev))
|
|
hsw_dp_set_ddi_pll_sel(pipe_config, intel_dp->link_bw);
|
|
else
|
|
intel_dp_set_clock(encoder, pipe_config, intel_dp->link_bw);
|
|
|
|
return true;
|
|
}
|
|
|
|
static void ironlake_set_pll_cpu_edp(struct intel_dp *intel_dp)
|
|
{
|
|
struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
|
|
struct intel_crtc *crtc = to_intel_crtc(dig_port->base.base.crtc);
|
|
struct drm_device *dev = crtc->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
u32 dpa_ctl;
|
|
|
|
DRM_DEBUG_KMS("eDP PLL enable for clock %d\n",
|
|
crtc->config->port_clock);
|
|
dpa_ctl = I915_READ(DP_A);
|
|
dpa_ctl &= ~DP_PLL_FREQ_MASK;
|
|
|
|
if (crtc->config->port_clock == 162000) {
|
|
/* For a long time we've carried around a ILK-DevA w/a for the
|
|
* 160MHz clock. If we're really unlucky, it's still required.
|
|
*/
|
|
DRM_DEBUG_KMS("160MHz cpu eDP clock, might need ilk devA w/a\n");
|
|
dpa_ctl |= DP_PLL_FREQ_160MHZ;
|
|
intel_dp->DP |= DP_PLL_FREQ_160MHZ;
|
|
} else {
|
|
dpa_ctl |= DP_PLL_FREQ_270MHZ;
|
|
intel_dp->DP |= DP_PLL_FREQ_270MHZ;
|
|
}
|
|
|
|
I915_WRITE(DP_A, dpa_ctl);
|
|
|
|
POSTING_READ(DP_A);
|
|
udelay(500);
|
|
}
|
|
|
|
static void intel_dp_prepare(struct intel_encoder *encoder)
|
|
{
|
|
struct drm_device *dev = encoder->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
|
|
enum port port = dp_to_dig_port(intel_dp)->port;
|
|
struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
|
|
struct drm_display_mode *adjusted_mode = &crtc->config->base.adjusted_mode;
|
|
|
|
/*
|
|
* There are four kinds of DP registers:
|
|
*
|
|
* IBX PCH
|
|
* SNB CPU
|
|
* IVB CPU
|
|
* CPT PCH
|
|
*
|
|
* IBX PCH and CPU are the same for almost everything,
|
|
* except that the CPU DP PLL is configured in this
|
|
* register
|
|
*
|
|
* CPT PCH is quite different, having many bits moved
|
|
* to the TRANS_DP_CTL register instead. That
|
|
* configuration happens (oddly) in ironlake_pch_enable
|
|
*/
|
|
|
|
/* Preserve the BIOS-computed detected bit. This is
|
|
* supposed to be read-only.
|
|
*/
|
|
intel_dp->DP = I915_READ(intel_dp->output_reg) & DP_DETECTED;
|
|
|
|
/* Handle DP bits in common between all three register formats */
|
|
intel_dp->DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0;
|
|
intel_dp->DP |= DP_PORT_WIDTH(intel_dp->lane_count);
|
|
|
|
if (crtc->config->has_audio)
|
|
intel_dp->DP |= DP_AUDIO_OUTPUT_ENABLE;
|
|
|
|
/* Split out the IBX/CPU vs CPT settings */
|
|
|
|
if (port == PORT_A && IS_GEN7(dev) && !IS_VALLEYVIEW(dev)) {
|
|
if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
|
|
intel_dp->DP |= DP_SYNC_HS_HIGH;
|
|
if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
|
|
intel_dp->DP |= DP_SYNC_VS_HIGH;
|
|
intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT;
|
|
|
|
if (drm_dp_enhanced_frame_cap(intel_dp->dpcd))
|
|
intel_dp->DP |= DP_ENHANCED_FRAMING;
|
|
|
|
intel_dp->DP |= crtc->pipe << 29;
|
|
} else if (!HAS_PCH_CPT(dev) || port == PORT_A) {
|
|
if (!HAS_PCH_SPLIT(dev) && !IS_VALLEYVIEW(dev))
|
|
intel_dp->DP |= intel_dp->color_range;
|
|
|
|
if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
|
|
intel_dp->DP |= DP_SYNC_HS_HIGH;
|
|
if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
|
|
intel_dp->DP |= DP_SYNC_VS_HIGH;
|
|
intel_dp->DP |= DP_LINK_TRAIN_OFF;
|
|
|
|
if (drm_dp_enhanced_frame_cap(intel_dp->dpcd))
|
|
intel_dp->DP |= DP_ENHANCED_FRAMING;
|
|
|
|
if (!IS_CHERRYVIEW(dev)) {
|
|
if (crtc->pipe == 1)
|
|
intel_dp->DP |= DP_PIPEB_SELECT;
|
|
} else {
|
|
intel_dp->DP |= DP_PIPE_SELECT_CHV(crtc->pipe);
|
|
}
|
|
} else {
|
|
intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT;
|
|
}
|
|
}
|
|
|
|
#define IDLE_ON_MASK (PP_ON | PP_SEQUENCE_MASK | 0 | PP_SEQUENCE_STATE_MASK)
|
|
#define IDLE_ON_VALUE (PP_ON | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_ON_IDLE)
|
|
|
|
#define IDLE_OFF_MASK (PP_ON | PP_SEQUENCE_MASK | 0 | 0)
|
|
#define IDLE_OFF_VALUE (0 | PP_SEQUENCE_NONE | 0 | 0)
|
|
|
|
#define IDLE_CYCLE_MASK (PP_ON | PP_SEQUENCE_MASK | PP_CYCLE_DELAY_ACTIVE | PP_SEQUENCE_STATE_MASK)
|
|
#define IDLE_CYCLE_VALUE (0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_OFF_IDLE)
|
|
|
|
static void wait_panel_status(struct intel_dp *intel_dp,
|
|
u32 mask,
|
|
u32 value)
|
|
{
|
|
struct drm_device *dev = intel_dp_to_dev(intel_dp);
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
u32 pp_stat_reg, pp_ctrl_reg;
|
|
|
|
lockdep_assert_held(&dev_priv->pps_mutex);
|
|
|
|
pp_stat_reg = _pp_stat_reg(intel_dp);
|
|
pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
|
|
|
|
DRM_DEBUG_KMS("mask %08x value %08x status %08x control %08x\n",
|
|
mask, value,
|
|
I915_READ(pp_stat_reg),
|
|
I915_READ(pp_ctrl_reg));
|
|
|
|
if (_wait_for((I915_READ(pp_stat_reg) & mask) == value, 5000, 10)) {
|
|
DRM_ERROR("Panel status timeout: status %08x control %08x\n",
|
|
I915_READ(pp_stat_reg),
|
|
I915_READ(pp_ctrl_reg));
|
|
}
|
|
|
|
DRM_DEBUG_KMS("Wait complete\n");
|
|
}
|
|
|
|
static void wait_panel_on(struct intel_dp *intel_dp)
|
|
{
|
|
DRM_DEBUG_KMS("Wait for panel power on\n");
|
|
wait_panel_status(intel_dp, IDLE_ON_MASK, IDLE_ON_VALUE);
|
|
}
|
|
|
|
static void wait_panel_off(struct intel_dp *intel_dp)
|
|
{
|
|
DRM_DEBUG_KMS("Wait for panel power off time\n");
|
|
wait_panel_status(intel_dp, IDLE_OFF_MASK, IDLE_OFF_VALUE);
|
|
}
|
|
|
|
static void wait_panel_power_cycle(struct intel_dp *intel_dp)
|
|
{
|
|
DRM_DEBUG_KMS("Wait for panel power cycle\n");
|
|
|
|
/* When we disable the VDD override bit last we have to do the manual
|
|
* wait. */
|
|
wait_remaining_ms_from_jiffies(intel_dp->last_power_cycle,
|
|
intel_dp->panel_power_cycle_delay);
|
|
|
|
wait_panel_status(intel_dp, IDLE_CYCLE_MASK, IDLE_CYCLE_VALUE);
|
|
}
|
|
|
|
static void wait_backlight_on(struct intel_dp *intel_dp)
|
|
{
|
|
wait_remaining_ms_from_jiffies(intel_dp->last_power_on,
|
|
intel_dp->backlight_on_delay);
|
|
}
|
|
|
|
static void edp_wait_backlight_off(struct intel_dp *intel_dp)
|
|
{
|
|
wait_remaining_ms_from_jiffies(intel_dp->last_backlight_off,
|
|
intel_dp->backlight_off_delay);
|
|
}
|
|
|
|
/* Read the current pp_control value, unlocking the register if it
|
|
* is locked
|
|
*/
|
|
|
|
static u32 ironlake_get_pp_control(struct intel_dp *intel_dp)
|
|
{
|
|
struct drm_device *dev = intel_dp_to_dev(intel_dp);
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
u32 control;
|
|
|
|
lockdep_assert_held(&dev_priv->pps_mutex);
|
|
|
|
control = I915_READ(_pp_ctrl_reg(intel_dp));
|
|
control &= ~PANEL_UNLOCK_MASK;
|
|
control |= PANEL_UNLOCK_REGS;
|
|
return control;
|
|
}
|
|
|
|
/*
|
|
* Must be paired with edp_panel_vdd_off().
|
|
* Must hold pps_mutex around the whole on/off sequence.
|
|
* Can be nested with intel_edp_panel_vdd_{on,off}() calls.
|
|
*/
|
|
static bool edp_panel_vdd_on(struct intel_dp *intel_dp)
|
|
{
|
|
struct drm_device *dev = intel_dp_to_dev(intel_dp);
|
|
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
|
|
struct intel_encoder *intel_encoder = &intel_dig_port->base;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
enum intel_display_power_domain power_domain;
|
|
u32 pp;
|
|
u32 pp_stat_reg, pp_ctrl_reg;
|
|
bool need_to_disable = !intel_dp->want_panel_vdd;
|
|
|
|
lockdep_assert_held(&dev_priv->pps_mutex);
|
|
|
|
if (!is_edp(intel_dp))
|
|
return false;
|
|
|
|
cancel_delayed_work(&intel_dp->panel_vdd_work);
|
|
intel_dp->want_panel_vdd = true;
|
|
|
|
if (edp_have_panel_vdd(intel_dp))
|
|
return need_to_disable;
|
|
|
|
power_domain = intel_display_port_power_domain(intel_encoder);
|
|
intel_display_power_get(dev_priv, power_domain);
|
|
|
|
DRM_DEBUG_KMS("Turning eDP port %c VDD on\n",
|
|
port_name(intel_dig_port->port));
|
|
|
|
if (!edp_have_panel_power(intel_dp))
|
|
wait_panel_power_cycle(intel_dp);
|
|
|
|
pp = ironlake_get_pp_control(intel_dp);
|
|
pp |= EDP_FORCE_VDD;
|
|
|
|
pp_stat_reg = _pp_stat_reg(intel_dp);
|
|
pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
|
|
|
|
I915_WRITE(pp_ctrl_reg, pp);
|
|
POSTING_READ(pp_ctrl_reg);
|
|
DRM_DEBUG_KMS("PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
|
|
I915_READ(pp_stat_reg), I915_READ(pp_ctrl_reg));
|
|
/*
|
|
* If the panel wasn't on, delay before accessing aux channel
|
|
*/
|
|
if (!edp_have_panel_power(intel_dp)) {
|
|
DRM_DEBUG_KMS("eDP port %c panel power wasn't enabled\n",
|
|
port_name(intel_dig_port->port));
|
|
msleep(intel_dp->panel_power_up_delay);
|
|
}
|
|
|
|
return need_to_disable;
|
|
}
|
|
|
|
/*
|
|
* Must be paired with intel_edp_panel_vdd_off() or
|
|
* intel_edp_panel_off().
|
|
* Nested calls to these functions are not allowed since
|
|
* we drop the lock. Caller must use some higher level
|
|
* locking to prevent nested calls from other threads.
|
|
*/
|
|
void intel_edp_panel_vdd_on(struct intel_dp *intel_dp)
|
|
{
|
|
bool vdd;
|
|
|
|
if (!is_edp(intel_dp))
|
|
return;
|
|
|
|
pps_lock(intel_dp);
|
|
vdd = edp_panel_vdd_on(intel_dp);
|
|
pps_unlock(intel_dp);
|
|
|
|
I915_STATE_WARN(!vdd, "eDP port %c VDD already requested on\n",
|
|
port_name(dp_to_dig_port(intel_dp)->port));
|
|
}
|
|
|
|
static void edp_panel_vdd_off_sync(struct intel_dp *intel_dp)
|
|
{
|
|
struct drm_device *dev = intel_dp_to_dev(intel_dp);
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_digital_port *intel_dig_port =
|
|
dp_to_dig_port(intel_dp);
|
|
struct intel_encoder *intel_encoder = &intel_dig_port->base;
|
|
enum intel_display_power_domain power_domain;
|
|
u32 pp;
|
|
u32 pp_stat_reg, pp_ctrl_reg;
|
|
|
|
lockdep_assert_held(&dev_priv->pps_mutex);
|
|
|
|
WARN_ON(intel_dp->want_panel_vdd);
|
|
|
|
if (!edp_have_panel_vdd(intel_dp))
|
|
return;
|
|
|
|
DRM_DEBUG_KMS("Turning eDP port %c VDD off\n",
|
|
port_name(intel_dig_port->port));
|
|
|
|
pp = ironlake_get_pp_control(intel_dp);
|
|
pp &= ~EDP_FORCE_VDD;
|
|
|
|
pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
|
|
pp_stat_reg = _pp_stat_reg(intel_dp);
|
|
|
|
I915_WRITE(pp_ctrl_reg, pp);
|
|
POSTING_READ(pp_ctrl_reg);
|
|
|
|
/* Make sure sequencer is idle before allowing subsequent activity */
|
|
DRM_DEBUG_KMS("PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
|
|
I915_READ(pp_stat_reg), I915_READ(pp_ctrl_reg));
|
|
|
|
if ((pp & POWER_TARGET_ON) == 0)
|
|
intel_dp->last_power_cycle = jiffies;
|
|
|
|
power_domain = intel_display_port_power_domain(intel_encoder);
|
|
intel_display_power_put(dev_priv, power_domain);
|
|
}
|
|
|
|
static void edp_panel_vdd_work(struct work_struct *__work)
|
|
{
|
|
struct intel_dp *intel_dp = container_of(to_delayed_work(__work),
|
|
struct intel_dp, panel_vdd_work);
|
|
|
|
pps_lock(intel_dp);
|
|
if (!intel_dp->want_panel_vdd)
|
|
edp_panel_vdd_off_sync(intel_dp);
|
|
pps_unlock(intel_dp);
|
|
}
|
|
|
|
static void edp_panel_vdd_schedule_off(struct intel_dp *intel_dp)
|
|
{
|
|
unsigned long delay;
|
|
|
|
/*
|
|
* Queue the timer to fire a long time from now (relative to the power
|
|
* down delay) to keep the panel power up across a sequence of
|
|
* operations.
|
|
*/
|
|
delay = msecs_to_jiffies(intel_dp->panel_power_cycle_delay * 5);
|
|
schedule_delayed_work(&intel_dp->panel_vdd_work, delay);
|
|
}
|
|
|
|
/*
|
|
* Must be paired with edp_panel_vdd_on().
|
|
* Must hold pps_mutex around the whole on/off sequence.
|
|
* Can be nested with intel_edp_panel_vdd_{on,off}() calls.
|
|
*/
|
|
static void edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync)
|
|
{
|
|
struct drm_i915_private *dev_priv =
|
|
intel_dp_to_dev(intel_dp)->dev_private;
|
|
|
|
lockdep_assert_held(&dev_priv->pps_mutex);
|
|
|
|
if (!is_edp(intel_dp))
|
|
return;
|
|
|
|
I915_STATE_WARN(!intel_dp->want_panel_vdd, "eDP port %c VDD not forced on",
|
|
port_name(dp_to_dig_port(intel_dp)->port));
|
|
|
|
intel_dp->want_panel_vdd = false;
|
|
|
|
if (sync)
|
|
edp_panel_vdd_off_sync(intel_dp);
|
|
else
|
|
edp_panel_vdd_schedule_off(intel_dp);
|
|
}
|
|
|
|
static void edp_panel_on(struct intel_dp *intel_dp)
|
|
{
|
|
struct drm_device *dev = intel_dp_to_dev(intel_dp);
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
u32 pp;
|
|
u32 pp_ctrl_reg;
|
|
|
|
lockdep_assert_held(&dev_priv->pps_mutex);
|
|
|
|
if (!is_edp(intel_dp))
|
|
return;
|
|
|
|
DRM_DEBUG_KMS("Turn eDP port %c panel power on\n",
|
|
port_name(dp_to_dig_port(intel_dp)->port));
|
|
|
|
if (WARN(edp_have_panel_power(intel_dp),
|
|
"eDP port %c panel power already on\n",
|
|
port_name(dp_to_dig_port(intel_dp)->port)))
|
|
return;
|
|
|
|
wait_panel_power_cycle(intel_dp);
|
|
|
|
pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
|
|
pp = ironlake_get_pp_control(intel_dp);
|
|
if (IS_GEN5(dev)) {
|
|
/* ILK workaround: disable reset around power sequence */
|
|
pp &= ~PANEL_POWER_RESET;
|
|
I915_WRITE(pp_ctrl_reg, pp);
|
|
POSTING_READ(pp_ctrl_reg);
|
|
}
|
|
|
|
pp |= POWER_TARGET_ON;
|
|
if (!IS_GEN5(dev))
|
|
pp |= PANEL_POWER_RESET;
|
|
|
|
I915_WRITE(pp_ctrl_reg, pp);
|
|
POSTING_READ(pp_ctrl_reg);
|
|
|
|
wait_panel_on(intel_dp);
|
|
intel_dp->last_power_on = jiffies;
|
|
|
|
if (IS_GEN5(dev)) {
|
|
pp |= PANEL_POWER_RESET; /* restore panel reset bit */
|
|
I915_WRITE(pp_ctrl_reg, pp);
|
|
POSTING_READ(pp_ctrl_reg);
|
|
}
|
|
}
|
|
|
|
void intel_edp_panel_on(struct intel_dp *intel_dp)
|
|
{
|
|
if (!is_edp(intel_dp))
|
|
return;
|
|
|
|
pps_lock(intel_dp);
|
|
edp_panel_on(intel_dp);
|
|
pps_unlock(intel_dp);
|
|
}
|
|
|
|
|
|
static void edp_panel_off(struct intel_dp *intel_dp)
|
|
{
|
|
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
|
|
struct intel_encoder *intel_encoder = &intel_dig_port->base;
|
|
struct drm_device *dev = intel_dp_to_dev(intel_dp);
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
enum intel_display_power_domain power_domain;
|
|
u32 pp;
|
|
u32 pp_ctrl_reg;
|
|
|
|
lockdep_assert_held(&dev_priv->pps_mutex);
|
|
|
|
if (!is_edp(intel_dp))
|
|
return;
|
|
|
|
DRM_DEBUG_KMS("Turn eDP port %c panel power off\n",
|
|
port_name(dp_to_dig_port(intel_dp)->port));
|
|
|
|
WARN(!intel_dp->want_panel_vdd, "Need eDP port %c VDD to turn off panel\n",
|
|
port_name(dp_to_dig_port(intel_dp)->port));
|
|
|
|
pp = ironlake_get_pp_control(intel_dp);
|
|
/* We need to switch off panel power _and_ force vdd, for otherwise some
|
|
* panels get very unhappy and cease to work. */
|
|
pp &= ~(POWER_TARGET_ON | PANEL_POWER_RESET | EDP_FORCE_VDD |
|
|
EDP_BLC_ENABLE);
|
|
|
|
pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
|
|
|
|
intel_dp->want_panel_vdd = false;
|
|
|
|
I915_WRITE(pp_ctrl_reg, pp);
|
|
POSTING_READ(pp_ctrl_reg);
|
|
|
|
intel_dp->last_power_cycle = jiffies;
|
|
wait_panel_off(intel_dp);
|
|
|
|
/* We got a reference when we enabled the VDD. */
|
|
power_domain = intel_display_port_power_domain(intel_encoder);
|
|
intel_display_power_put(dev_priv, power_domain);
|
|
}
|
|
|
|
void intel_edp_panel_off(struct intel_dp *intel_dp)
|
|
{
|
|
if (!is_edp(intel_dp))
|
|
return;
|
|
|
|
pps_lock(intel_dp);
|
|
edp_panel_off(intel_dp);
|
|
pps_unlock(intel_dp);
|
|
}
|
|
|
|
/* Enable backlight in the panel power control. */
|
|
static void _intel_edp_backlight_on(struct intel_dp *intel_dp)
|
|
{
|
|
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
|
|
struct drm_device *dev = intel_dig_port->base.base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
u32 pp;
|
|
u32 pp_ctrl_reg;
|
|
|
|
/*
|
|
* If we enable the backlight right away following a panel power
|
|
* on, we may see slight flicker as the panel syncs with the eDP
|
|
* link. So delay a bit to make sure the image is solid before
|
|
* allowing it to appear.
|
|
*/
|
|
wait_backlight_on(intel_dp);
|
|
|
|
pps_lock(intel_dp);
|
|
|
|
pp = ironlake_get_pp_control(intel_dp);
|
|
pp |= EDP_BLC_ENABLE;
|
|
|
|
pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
|
|
|
|
I915_WRITE(pp_ctrl_reg, pp);
|
|
POSTING_READ(pp_ctrl_reg);
|
|
|
|
pps_unlock(intel_dp);
|
|
}
|
|
|
|
/* Enable backlight PWM and backlight PP control. */
|
|
void intel_edp_backlight_on(struct intel_dp *intel_dp)
|
|
{
|
|
if (!is_edp(intel_dp))
|
|
return;
|
|
|
|
DRM_DEBUG_KMS("\n");
|
|
|
|
intel_panel_enable_backlight(intel_dp->attached_connector);
|
|
_intel_edp_backlight_on(intel_dp);
|
|
}
|
|
|
|
/* Disable backlight in the panel power control. */
|
|
static void _intel_edp_backlight_off(struct intel_dp *intel_dp)
|
|
{
|
|
struct drm_device *dev = intel_dp_to_dev(intel_dp);
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
u32 pp;
|
|
u32 pp_ctrl_reg;
|
|
|
|
if (!is_edp(intel_dp))
|
|
return;
|
|
|
|
pps_lock(intel_dp);
|
|
|
|
pp = ironlake_get_pp_control(intel_dp);
|
|
pp &= ~EDP_BLC_ENABLE;
|
|
|
|
pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
|
|
|
|
I915_WRITE(pp_ctrl_reg, pp);
|
|
POSTING_READ(pp_ctrl_reg);
|
|
|
|
pps_unlock(intel_dp);
|
|
|
|
intel_dp->last_backlight_off = jiffies;
|
|
edp_wait_backlight_off(intel_dp);
|
|
}
|
|
|
|
/* Disable backlight PP control and backlight PWM. */
|
|
void intel_edp_backlight_off(struct intel_dp *intel_dp)
|
|
{
|
|
if (!is_edp(intel_dp))
|
|
return;
|
|
|
|
DRM_DEBUG_KMS("\n");
|
|
|
|
_intel_edp_backlight_off(intel_dp);
|
|
intel_panel_disable_backlight(intel_dp->attached_connector);
|
|
}
|
|
|
|
/*
|
|
* Hook for controlling the panel power control backlight through the bl_power
|
|
* sysfs attribute. Take care to handle multiple calls.
|
|
*/
|
|
static void intel_edp_backlight_power(struct intel_connector *connector,
|
|
bool enable)
|
|
{
|
|
struct intel_dp *intel_dp = intel_attached_dp(&connector->base);
|
|
bool is_enabled;
|
|
|
|
pps_lock(intel_dp);
|
|
is_enabled = ironlake_get_pp_control(intel_dp) & EDP_BLC_ENABLE;
|
|
pps_unlock(intel_dp);
|
|
|
|
if (is_enabled == enable)
|
|
return;
|
|
|
|
DRM_DEBUG_KMS("panel power control backlight %s\n",
|
|
enable ? "enable" : "disable");
|
|
|
|
if (enable)
|
|
_intel_edp_backlight_on(intel_dp);
|
|
else
|
|
_intel_edp_backlight_off(intel_dp);
|
|
}
|
|
|
|
static void ironlake_edp_pll_on(struct intel_dp *intel_dp)
|
|
{
|
|
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
|
|
struct drm_crtc *crtc = intel_dig_port->base.base.crtc;
|
|
struct drm_device *dev = crtc->dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
u32 dpa_ctl;
|
|
|
|
assert_pipe_disabled(dev_priv,
|
|
to_intel_crtc(crtc)->pipe);
|
|
|
|
DRM_DEBUG_KMS("\n");
|
|
dpa_ctl = I915_READ(DP_A);
|
|
WARN(dpa_ctl & DP_PLL_ENABLE, "dp pll on, should be off\n");
|
|
WARN(dpa_ctl & DP_PORT_EN, "dp port still on, should be off\n");
|
|
|
|
/* We don't adjust intel_dp->DP while tearing down the link, to
|
|
* facilitate link retraining (e.g. after hotplug). Hence clear all
|
|
* enable bits here to ensure that we don't enable too much. */
|
|
intel_dp->DP &= ~(DP_PORT_EN | DP_AUDIO_OUTPUT_ENABLE);
|
|
intel_dp->DP |= DP_PLL_ENABLE;
|
|
I915_WRITE(DP_A, intel_dp->DP);
|
|
POSTING_READ(DP_A);
|
|
udelay(200);
|
|
}
|
|
|
|
static void ironlake_edp_pll_off(struct intel_dp *intel_dp)
|
|
{
|
|
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
|
|
struct drm_crtc *crtc = intel_dig_port->base.base.crtc;
|
|
struct drm_device *dev = crtc->dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
u32 dpa_ctl;
|
|
|
|
assert_pipe_disabled(dev_priv,
|
|
to_intel_crtc(crtc)->pipe);
|
|
|
|
dpa_ctl = I915_READ(DP_A);
|
|
WARN((dpa_ctl & DP_PLL_ENABLE) == 0,
|
|
"dp pll off, should be on\n");
|
|
WARN(dpa_ctl & DP_PORT_EN, "dp port still on, should be off\n");
|
|
|
|
/* We can't rely on the value tracked for the DP register in
|
|
* intel_dp->DP because link_down must not change that (otherwise link
|
|
* re-training will fail. */
|
|
dpa_ctl &= ~DP_PLL_ENABLE;
|
|
I915_WRITE(DP_A, dpa_ctl);
|
|
POSTING_READ(DP_A);
|
|
udelay(200);
|
|
}
|
|
|
|
/* If the sink supports it, try to set the power state appropriately */
|
|
void intel_dp_sink_dpms(struct intel_dp *intel_dp, int mode)
|
|
{
|
|
int ret, i;
|
|
|
|
/* Should have a valid DPCD by this point */
|
|
if (intel_dp->dpcd[DP_DPCD_REV] < 0x11)
|
|
return;
|
|
|
|
if (mode != DRM_MODE_DPMS_ON) {
|
|
ret = drm_dp_dpcd_writeb(&intel_dp->aux, DP_SET_POWER,
|
|
DP_SET_POWER_D3);
|
|
} else {
|
|
/*
|
|
* When turning on, we need to retry for 1ms to give the sink
|
|
* time to wake up.
|
|
*/
|
|
for (i = 0; i < 3; i++) {
|
|
ret = drm_dp_dpcd_writeb(&intel_dp->aux, DP_SET_POWER,
|
|
DP_SET_POWER_D0);
|
|
if (ret == 1)
|
|
break;
|
|
msleep(1);
|
|
}
|
|
}
|
|
|
|
if (ret != 1)
|
|
DRM_DEBUG_KMS("failed to %s sink power state\n",
|
|
mode == DRM_MODE_DPMS_ON ? "enable" : "disable");
|
|
}
|
|
|
|
static bool intel_dp_get_hw_state(struct intel_encoder *encoder,
|
|
enum pipe *pipe)
|
|
{
|
|
struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
|
|
enum port port = dp_to_dig_port(intel_dp)->port;
|
|
struct drm_device *dev = encoder->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
enum intel_display_power_domain power_domain;
|
|
u32 tmp;
|
|
|
|
power_domain = intel_display_port_power_domain(encoder);
|
|
if (!intel_display_power_is_enabled(dev_priv, power_domain))
|
|
return false;
|
|
|
|
tmp = I915_READ(intel_dp->output_reg);
|
|
|
|
if (!(tmp & DP_PORT_EN))
|
|
return false;
|
|
|
|
if (port == PORT_A && IS_GEN7(dev) && !IS_VALLEYVIEW(dev)) {
|
|
*pipe = PORT_TO_PIPE_CPT(tmp);
|
|
} else if (IS_CHERRYVIEW(dev)) {
|
|
*pipe = DP_PORT_TO_PIPE_CHV(tmp);
|
|
} else if (!HAS_PCH_CPT(dev) || port == PORT_A) {
|
|
*pipe = PORT_TO_PIPE(tmp);
|
|
} else {
|
|
u32 trans_sel;
|
|
u32 trans_dp;
|
|
int i;
|
|
|
|
switch (intel_dp->output_reg) {
|
|
case PCH_DP_B:
|
|
trans_sel = TRANS_DP_PORT_SEL_B;
|
|
break;
|
|
case PCH_DP_C:
|
|
trans_sel = TRANS_DP_PORT_SEL_C;
|
|
break;
|
|
case PCH_DP_D:
|
|
trans_sel = TRANS_DP_PORT_SEL_D;
|
|
break;
|
|
default:
|
|
return true;
|
|
}
|
|
|
|
for_each_pipe(dev_priv, i) {
|
|
trans_dp = I915_READ(TRANS_DP_CTL(i));
|
|
if ((trans_dp & TRANS_DP_PORT_SEL_MASK) == trans_sel) {
|
|
*pipe = i;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
DRM_DEBUG_KMS("No pipe for dp port 0x%x found\n",
|
|
intel_dp->output_reg);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static void intel_dp_get_config(struct intel_encoder *encoder,
|
|
struct intel_crtc_state *pipe_config)
|
|
{
|
|
struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
|
|
u32 tmp, flags = 0;
|
|
struct drm_device *dev = encoder->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
enum port port = dp_to_dig_port(intel_dp)->port;
|
|
struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
|
|
int dotclock;
|
|
|
|
tmp = I915_READ(intel_dp->output_reg);
|
|
|
|
pipe_config->has_audio = tmp & DP_AUDIO_OUTPUT_ENABLE && port != PORT_A;
|
|
|
|
if ((port == PORT_A) || !HAS_PCH_CPT(dev)) {
|
|
if (tmp & DP_SYNC_HS_HIGH)
|
|
flags |= DRM_MODE_FLAG_PHSYNC;
|
|
else
|
|
flags |= DRM_MODE_FLAG_NHSYNC;
|
|
|
|
if (tmp & DP_SYNC_VS_HIGH)
|
|
flags |= DRM_MODE_FLAG_PVSYNC;
|
|
else
|
|
flags |= DRM_MODE_FLAG_NVSYNC;
|
|
} else {
|
|
tmp = I915_READ(TRANS_DP_CTL(crtc->pipe));
|
|
if (tmp & TRANS_DP_HSYNC_ACTIVE_HIGH)
|
|
flags |= DRM_MODE_FLAG_PHSYNC;
|
|
else
|
|
flags |= DRM_MODE_FLAG_NHSYNC;
|
|
|
|
if (tmp & TRANS_DP_VSYNC_ACTIVE_HIGH)
|
|
flags |= DRM_MODE_FLAG_PVSYNC;
|
|
else
|
|
flags |= DRM_MODE_FLAG_NVSYNC;
|
|
}
|
|
|
|
pipe_config->base.adjusted_mode.flags |= flags;
|
|
|
|
if (!HAS_PCH_SPLIT(dev) && !IS_VALLEYVIEW(dev) &&
|
|
tmp & DP_COLOR_RANGE_16_235)
|
|
pipe_config->limited_color_range = true;
|
|
|
|
pipe_config->has_dp_encoder = true;
|
|
|
|
intel_dp_get_m_n(crtc, pipe_config);
|
|
|
|
if (port == PORT_A) {
|
|
if ((I915_READ(DP_A) & DP_PLL_FREQ_MASK) == DP_PLL_FREQ_160MHZ)
|
|
pipe_config->port_clock = 162000;
|
|
else
|
|
pipe_config->port_clock = 270000;
|
|
}
|
|
|
|
dotclock = intel_dotclock_calculate(pipe_config->port_clock,
|
|
&pipe_config->dp_m_n);
|
|
|
|
if (HAS_PCH_SPLIT(dev_priv->dev) && port != PORT_A)
|
|
ironlake_check_encoder_dotclock(pipe_config, dotclock);
|
|
|
|
pipe_config->base.adjusted_mode.crtc_clock = dotclock;
|
|
|
|
if (is_edp(intel_dp) && dev_priv->vbt.edp_bpp &&
|
|
pipe_config->pipe_bpp > dev_priv->vbt.edp_bpp) {
|
|
/*
|
|
* This is a big fat ugly hack.
|
|
*
|
|
* Some machines in UEFI boot mode provide us a VBT that has 18
|
|
* bpp and 1.62 GHz link bandwidth for eDP, which for reasons
|
|
* unknown we fail to light up. Yet the same BIOS boots up with
|
|
* 24 bpp and 2.7 GHz link. Use the same bpp as the BIOS uses as
|
|
* max, not what it tells us to use.
|
|
*
|
|
* Note: This will still be broken if the eDP panel is not lit
|
|
* up by the BIOS, and thus we can't get the mode at module
|
|
* load.
|
|
*/
|
|
DRM_DEBUG_KMS("pipe has %d bpp for eDP panel, overriding BIOS-provided max %d bpp\n",
|
|
pipe_config->pipe_bpp, dev_priv->vbt.edp_bpp);
|
|
dev_priv->vbt.edp_bpp = pipe_config->pipe_bpp;
|
|
}
|
|
}
|
|
|
|
static void intel_disable_dp(struct intel_encoder *encoder)
|
|
{
|
|
struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
|
|
struct drm_device *dev = encoder->base.dev;
|
|
struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
|
|
|
|
if (crtc->config->has_audio)
|
|
intel_audio_codec_disable(encoder);
|
|
|
|
if (HAS_PSR(dev) && !HAS_DDI(dev))
|
|
intel_psr_disable(intel_dp);
|
|
|
|
/* Make sure the panel is off before trying to change the mode. But also
|
|
* ensure that we have vdd while we switch off the panel. */
|
|
intel_edp_panel_vdd_on(intel_dp);
|
|
intel_edp_backlight_off(intel_dp);
|
|
intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
|
|
intel_edp_panel_off(intel_dp);
|
|
|
|
/* disable the port before the pipe on g4x */
|
|
if (INTEL_INFO(dev)->gen < 5)
|
|
intel_dp_link_down(intel_dp);
|
|
}
|
|
|
|
static void ilk_post_disable_dp(struct intel_encoder *encoder)
|
|
{
|
|
struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
|
|
enum port port = dp_to_dig_port(intel_dp)->port;
|
|
|
|
intel_dp_link_down(intel_dp);
|
|
if (port == PORT_A)
|
|
ironlake_edp_pll_off(intel_dp);
|
|
}
|
|
|
|
static void vlv_post_disable_dp(struct intel_encoder *encoder)
|
|
{
|
|
struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
|
|
|
|
intel_dp_link_down(intel_dp);
|
|
}
|
|
|
|
static void chv_post_disable_dp(struct intel_encoder *encoder)
|
|
{
|
|
struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
|
|
struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
|
|
struct drm_device *dev = encoder->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_crtc *intel_crtc =
|
|
to_intel_crtc(encoder->base.crtc);
|
|
enum dpio_channel ch = vlv_dport_to_channel(dport);
|
|
enum pipe pipe = intel_crtc->pipe;
|
|
u32 val;
|
|
|
|
intel_dp_link_down(intel_dp);
|
|
|
|
mutex_lock(&dev_priv->dpio_lock);
|
|
|
|
/* Propagate soft reset to data lane reset */
|
|
val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW1(ch));
|
|
val |= CHV_PCS_REQ_SOFTRESET_EN;
|
|
vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW1(ch), val);
|
|
|
|
val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW1(ch));
|
|
val |= CHV_PCS_REQ_SOFTRESET_EN;
|
|
vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW1(ch), val);
|
|
|
|
val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW0(ch));
|
|
val &= ~(DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET);
|
|
vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW0(ch), val);
|
|
|
|
val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW0(ch));
|
|
val &= ~(DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET);
|
|
vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW0(ch), val);
|
|
|
|
mutex_unlock(&dev_priv->dpio_lock);
|
|
}
|
|
|
|
static void
|
|
_intel_dp_set_link_train(struct intel_dp *intel_dp,
|
|
uint32_t *DP,
|
|
uint8_t dp_train_pat)
|
|
{
|
|
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
|
|
struct drm_device *dev = intel_dig_port->base.base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
enum port port = intel_dig_port->port;
|
|
|
|
if (HAS_DDI(dev)) {
|
|
uint32_t temp = I915_READ(DP_TP_CTL(port));
|
|
|
|
if (dp_train_pat & DP_LINK_SCRAMBLING_DISABLE)
|
|
temp |= DP_TP_CTL_SCRAMBLE_DISABLE;
|
|
else
|
|
temp &= ~DP_TP_CTL_SCRAMBLE_DISABLE;
|
|
|
|
temp &= ~DP_TP_CTL_LINK_TRAIN_MASK;
|
|
switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) {
|
|
case DP_TRAINING_PATTERN_DISABLE:
|
|
temp |= DP_TP_CTL_LINK_TRAIN_NORMAL;
|
|
|
|
break;
|
|
case DP_TRAINING_PATTERN_1:
|
|
temp |= DP_TP_CTL_LINK_TRAIN_PAT1;
|
|
break;
|
|
case DP_TRAINING_PATTERN_2:
|
|
temp |= DP_TP_CTL_LINK_TRAIN_PAT2;
|
|
break;
|
|
case DP_TRAINING_PATTERN_3:
|
|
temp |= DP_TP_CTL_LINK_TRAIN_PAT3;
|
|
break;
|
|
}
|
|
I915_WRITE(DP_TP_CTL(port), temp);
|
|
|
|
} else if (HAS_PCH_CPT(dev) && (IS_GEN7(dev) || port != PORT_A)) {
|
|
*DP &= ~DP_LINK_TRAIN_MASK_CPT;
|
|
|
|
switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) {
|
|
case DP_TRAINING_PATTERN_DISABLE:
|
|
*DP |= DP_LINK_TRAIN_OFF_CPT;
|
|
break;
|
|
case DP_TRAINING_PATTERN_1:
|
|
*DP |= DP_LINK_TRAIN_PAT_1_CPT;
|
|
break;
|
|
case DP_TRAINING_PATTERN_2:
|
|
*DP |= DP_LINK_TRAIN_PAT_2_CPT;
|
|
break;
|
|
case DP_TRAINING_PATTERN_3:
|
|
DRM_ERROR("DP training pattern 3 not supported\n");
|
|
*DP |= DP_LINK_TRAIN_PAT_2_CPT;
|
|
break;
|
|
}
|
|
|
|
} else {
|
|
if (IS_CHERRYVIEW(dev))
|
|
*DP &= ~DP_LINK_TRAIN_MASK_CHV;
|
|
else
|
|
*DP &= ~DP_LINK_TRAIN_MASK;
|
|
|
|
switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) {
|
|
case DP_TRAINING_PATTERN_DISABLE:
|
|
*DP |= DP_LINK_TRAIN_OFF;
|
|
break;
|
|
case DP_TRAINING_PATTERN_1:
|
|
*DP |= DP_LINK_TRAIN_PAT_1;
|
|
break;
|
|
case DP_TRAINING_PATTERN_2:
|
|
*DP |= DP_LINK_TRAIN_PAT_2;
|
|
break;
|
|
case DP_TRAINING_PATTERN_3:
|
|
if (IS_CHERRYVIEW(dev)) {
|
|
*DP |= DP_LINK_TRAIN_PAT_3_CHV;
|
|
} else {
|
|
DRM_ERROR("DP training pattern 3 not supported\n");
|
|
*DP |= DP_LINK_TRAIN_PAT_2;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void intel_dp_enable_port(struct intel_dp *intel_dp)
|
|
{
|
|
struct drm_device *dev = intel_dp_to_dev(intel_dp);
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
|
|
/* enable with pattern 1 (as per spec) */
|
|
_intel_dp_set_link_train(intel_dp, &intel_dp->DP,
|
|
DP_TRAINING_PATTERN_1);
|
|
|
|
I915_WRITE(intel_dp->output_reg, intel_dp->DP);
|
|
POSTING_READ(intel_dp->output_reg);
|
|
|
|
/*
|
|
* Magic for VLV/CHV. We _must_ first set up the register
|
|
* without actually enabling the port, and then do another
|
|
* write to enable the port. Otherwise link training will
|
|
* fail when the power sequencer is freshly used for this port.
|
|
*/
|
|
intel_dp->DP |= DP_PORT_EN;
|
|
|
|
I915_WRITE(intel_dp->output_reg, intel_dp->DP);
|
|
POSTING_READ(intel_dp->output_reg);
|
|
}
|
|
|
|
static void intel_enable_dp(struct intel_encoder *encoder)
|
|
{
|
|
struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
|
|
struct drm_device *dev = encoder->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
|
|
uint32_t dp_reg = I915_READ(intel_dp->output_reg);
|
|
|
|
if (WARN_ON(dp_reg & DP_PORT_EN))
|
|
return;
|
|
|
|
pps_lock(intel_dp);
|
|
|
|
if (IS_VALLEYVIEW(dev))
|
|
vlv_init_panel_power_sequencer(intel_dp);
|
|
|
|
intel_dp_enable_port(intel_dp);
|
|
|
|
edp_panel_vdd_on(intel_dp);
|
|
edp_panel_on(intel_dp);
|
|
edp_panel_vdd_off(intel_dp, true);
|
|
|
|
pps_unlock(intel_dp);
|
|
|
|
if (IS_VALLEYVIEW(dev))
|
|
vlv_wait_port_ready(dev_priv, dp_to_dig_port(intel_dp));
|
|
|
|
intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
|
|
intel_dp_start_link_train(intel_dp);
|
|
intel_dp_complete_link_train(intel_dp);
|
|
intel_dp_stop_link_train(intel_dp);
|
|
|
|
if (crtc->config->has_audio) {
|
|
DRM_DEBUG_DRIVER("Enabling DP audio on pipe %c\n",
|
|
pipe_name(crtc->pipe));
|
|
intel_audio_codec_enable(encoder);
|
|
}
|
|
}
|
|
|
|
static void g4x_enable_dp(struct intel_encoder *encoder)
|
|
{
|
|
struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
|
|
|
|
intel_enable_dp(encoder);
|
|
intel_edp_backlight_on(intel_dp);
|
|
}
|
|
|
|
static void vlv_enable_dp(struct intel_encoder *encoder)
|
|
{
|
|
struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
|
|
|
|
intel_edp_backlight_on(intel_dp);
|
|
intel_psr_enable(intel_dp);
|
|
}
|
|
|
|
static void g4x_pre_enable_dp(struct intel_encoder *encoder)
|
|
{
|
|
struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
|
|
struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
|
|
|
|
intel_dp_prepare(encoder);
|
|
|
|
/* Only ilk+ has port A */
|
|
if (dport->port == PORT_A) {
|
|
ironlake_set_pll_cpu_edp(intel_dp);
|
|
ironlake_edp_pll_on(intel_dp);
|
|
}
|
|
}
|
|
|
|
static void vlv_detach_power_sequencer(struct intel_dp *intel_dp)
|
|
{
|
|
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
|
|
struct drm_i915_private *dev_priv = intel_dig_port->base.base.dev->dev_private;
|
|
enum pipe pipe = intel_dp->pps_pipe;
|
|
int pp_on_reg = VLV_PIPE_PP_ON_DELAYS(pipe);
|
|
|
|
edp_panel_vdd_off_sync(intel_dp);
|
|
|
|
/*
|
|
* VLV seems to get confused when multiple power seqeuencers
|
|
* have the same port selected (even if only one has power/vdd
|
|
* enabled). The failure manifests as vlv_wait_port_ready() failing
|
|
* CHV on the other hand doesn't seem to mind having the same port
|
|
* selected in multiple power seqeuencers, but let's clear the
|
|
* port select always when logically disconnecting a power sequencer
|
|
* from a port.
|
|
*/
|
|
DRM_DEBUG_KMS("detaching pipe %c power sequencer from port %c\n",
|
|
pipe_name(pipe), port_name(intel_dig_port->port));
|
|
I915_WRITE(pp_on_reg, 0);
|
|
POSTING_READ(pp_on_reg);
|
|
|
|
intel_dp->pps_pipe = INVALID_PIPE;
|
|
}
|
|
|
|
static void vlv_steal_power_sequencer(struct drm_device *dev,
|
|
enum pipe pipe)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_encoder *encoder;
|
|
|
|
lockdep_assert_held(&dev_priv->pps_mutex);
|
|
|
|
if (WARN_ON(pipe != PIPE_A && pipe != PIPE_B))
|
|
return;
|
|
|
|
list_for_each_entry(encoder, &dev->mode_config.encoder_list,
|
|
base.head) {
|
|
struct intel_dp *intel_dp;
|
|
enum port port;
|
|
|
|
if (encoder->type != INTEL_OUTPUT_EDP)
|
|
continue;
|
|
|
|
intel_dp = enc_to_intel_dp(&encoder->base);
|
|
port = dp_to_dig_port(intel_dp)->port;
|
|
|
|
if (intel_dp->pps_pipe != pipe)
|
|
continue;
|
|
|
|
DRM_DEBUG_KMS("stealing pipe %c power sequencer from port %c\n",
|
|
pipe_name(pipe), port_name(port));
|
|
|
|
WARN(encoder->connectors_active,
|
|
"stealing pipe %c power sequencer from active eDP port %c\n",
|
|
pipe_name(pipe), port_name(port));
|
|
|
|
/* make sure vdd is off before we steal it */
|
|
vlv_detach_power_sequencer(intel_dp);
|
|
}
|
|
}
|
|
|
|
static void vlv_init_panel_power_sequencer(struct intel_dp *intel_dp)
|
|
{
|
|
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
|
|
struct intel_encoder *encoder = &intel_dig_port->base;
|
|
struct drm_device *dev = encoder->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
|
|
|
|
lockdep_assert_held(&dev_priv->pps_mutex);
|
|
|
|
if (!is_edp(intel_dp))
|
|
return;
|
|
|
|
if (intel_dp->pps_pipe == crtc->pipe)
|
|
return;
|
|
|
|
/*
|
|
* If another power sequencer was being used on this
|
|
* port previously make sure to turn off vdd there while
|
|
* we still have control of it.
|
|
*/
|
|
if (intel_dp->pps_pipe != INVALID_PIPE)
|
|
vlv_detach_power_sequencer(intel_dp);
|
|
|
|
/*
|
|
* We may be stealing the power
|
|
* sequencer from another port.
|
|
*/
|
|
vlv_steal_power_sequencer(dev, crtc->pipe);
|
|
|
|
/* now it's all ours */
|
|
intel_dp->pps_pipe = crtc->pipe;
|
|
|
|
DRM_DEBUG_KMS("initializing pipe %c power sequencer for port %c\n",
|
|
pipe_name(intel_dp->pps_pipe), port_name(intel_dig_port->port));
|
|
|
|
/* init power sequencer on this pipe and port */
|
|
intel_dp_init_panel_power_sequencer(dev, intel_dp);
|
|
intel_dp_init_panel_power_sequencer_registers(dev, intel_dp);
|
|
}
|
|
|
|
static void vlv_pre_enable_dp(struct intel_encoder *encoder)
|
|
{
|
|
struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
|
|
struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
|
|
struct drm_device *dev = encoder->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
|
|
enum dpio_channel port = vlv_dport_to_channel(dport);
|
|
int pipe = intel_crtc->pipe;
|
|
u32 val;
|
|
|
|
mutex_lock(&dev_priv->dpio_lock);
|
|
|
|
val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW8(port));
|
|
val = 0;
|
|
if (pipe)
|
|
val |= (1<<21);
|
|
else
|
|
val &= ~(1<<21);
|
|
val |= 0x001000c4;
|
|
vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW8(port), val);
|
|
vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW14(port), 0x00760018);
|
|
vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW23(port), 0x00400888);
|
|
|
|
mutex_unlock(&dev_priv->dpio_lock);
|
|
|
|
intel_enable_dp(encoder);
|
|
}
|
|
|
|
static void vlv_dp_pre_pll_enable(struct intel_encoder *encoder)
|
|
{
|
|
struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
|
|
struct drm_device *dev = encoder->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_crtc *intel_crtc =
|
|
to_intel_crtc(encoder->base.crtc);
|
|
enum dpio_channel port = vlv_dport_to_channel(dport);
|
|
int pipe = intel_crtc->pipe;
|
|
|
|
intel_dp_prepare(encoder);
|
|
|
|
/* Program Tx lane resets to default */
|
|
mutex_lock(&dev_priv->dpio_lock);
|
|
vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW0(port),
|
|
DPIO_PCS_TX_LANE2_RESET |
|
|
DPIO_PCS_TX_LANE1_RESET);
|
|
vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW1(port),
|
|
DPIO_PCS_CLK_CRI_RXEB_EIOS_EN |
|
|
DPIO_PCS_CLK_CRI_RXDIGFILTSG_EN |
|
|
(1<<DPIO_PCS_CLK_DATAWIDTH_SHIFT) |
|
|
DPIO_PCS_CLK_SOFT_RESET);
|
|
|
|
/* Fix up inter-pair skew failure */
|
|
vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW12(port), 0x00750f00);
|
|
vlv_dpio_write(dev_priv, pipe, VLV_TX_DW11(port), 0x00001500);
|
|
vlv_dpio_write(dev_priv, pipe, VLV_TX_DW14(port), 0x40400000);
|
|
mutex_unlock(&dev_priv->dpio_lock);
|
|
}
|
|
|
|
static void chv_pre_enable_dp(struct intel_encoder *encoder)
|
|
{
|
|
struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
|
|
struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
|
|
struct drm_device *dev = encoder->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_crtc *intel_crtc =
|
|
to_intel_crtc(encoder->base.crtc);
|
|
enum dpio_channel ch = vlv_dport_to_channel(dport);
|
|
int pipe = intel_crtc->pipe;
|
|
int data, i;
|
|
u32 val;
|
|
|
|
mutex_lock(&dev_priv->dpio_lock);
|
|
|
|
/* allow hardware to manage TX FIFO reset source */
|
|
val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW11(ch));
|
|
val &= ~DPIO_LANEDESKEW_STRAP_OVRD;
|
|
vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW11(ch), val);
|
|
|
|
val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW11(ch));
|
|
val &= ~DPIO_LANEDESKEW_STRAP_OVRD;
|
|
vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW11(ch), val);
|
|
|
|
/* Deassert soft data lane reset*/
|
|
val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW1(ch));
|
|
val |= CHV_PCS_REQ_SOFTRESET_EN;
|
|
vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW1(ch), val);
|
|
|
|
val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW1(ch));
|
|
val |= CHV_PCS_REQ_SOFTRESET_EN;
|
|
vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW1(ch), val);
|
|
|
|
val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW0(ch));
|
|
val |= (DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET);
|
|
vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW0(ch), val);
|
|
|
|
val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW0(ch));
|
|
val |= (DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET);
|
|
vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW0(ch), val);
|
|
|
|
/* Program Tx lane latency optimal setting*/
|
|
for (i = 0; i < 4; i++) {
|
|
/* Set the upar bit */
|
|
data = (i == 1) ? 0x0 : 0x1;
|
|
vlv_dpio_write(dev_priv, pipe, CHV_TX_DW14(ch, i),
|
|
data << DPIO_UPAR_SHIFT);
|
|
}
|
|
|
|
/* Data lane stagger programming */
|
|
/* FIXME: Fix up value only after power analysis */
|
|
|
|
mutex_unlock(&dev_priv->dpio_lock);
|
|
|
|
intel_enable_dp(encoder);
|
|
}
|
|
|
|
static void chv_dp_pre_pll_enable(struct intel_encoder *encoder)
|
|
{
|
|
struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
|
|
struct drm_device *dev = encoder->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_crtc *intel_crtc =
|
|
to_intel_crtc(encoder->base.crtc);
|
|
enum dpio_channel ch = vlv_dport_to_channel(dport);
|
|
enum pipe pipe = intel_crtc->pipe;
|
|
u32 val;
|
|
|
|
intel_dp_prepare(encoder);
|
|
|
|
mutex_lock(&dev_priv->dpio_lock);
|
|
|
|
/* program left/right clock distribution */
|
|
if (pipe != PIPE_B) {
|
|
val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW5_CH0);
|
|
val &= ~(CHV_BUFLEFTENA1_MASK | CHV_BUFRIGHTENA1_MASK);
|
|
if (ch == DPIO_CH0)
|
|
val |= CHV_BUFLEFTENA1_FORCE;
|
|
if (ch == DPIO_CH1)
|
|
val |= CHV_BUFRIGHTENA1_FORCE;
|
|
vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW5_CH0, val);
|
|
} else {
|
|
val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW1_CH1);
|
|
val &= ~(CHV_BUFLEFTENA2_MASK | CHV_BUFRIGHTENA2_MASK);
|
|
if (ch == DPIO_CH0)
|
|
val |= CHV_BUFLEFTENA2_FORCE;
|
|
if (ch == DPIO_CH1)
|
|
val |= CHV_BUFRIGHTENA2_FORCE;
|
|
vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW1_CH1, val);
|
|
}
|
|
|
|
/* program clock channel usage */
|
|
val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW8(ch));
|
|
val |= CHV_PCS_USEDCLKCHANNEL_OVRRIDE;
|
|
if (pipe != PIPE_B)
|
|
val &= ~CHV_PCS_USEDCLKCHANNEL;
|
|
else
|
|
val |= CHV_PCS_USEDCLKCHANNEL;
|
|
vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW8(ch), val);
|
|
|
|
val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW8(ch));
|
|
val |= CHV_PCS_USEDCLKCHANNEL_OVRRIDE;
|
|
if (pipe != PIPE_B)
|
|
val &= ~CHV_PCS_USEDCLKCHANNEL;
|
|
else
|
|
val |= CHV_PCS_USEDCLKCHANNEL;
|
|
vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW8(ch), val);
|
|
|
|
/*
|
|
* This a a bit weird since generally CL
|
|
* matches the pipe, but here we need to
|
|
* pick the CL based on the port.
|
|
*/
|
|
val = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW19(ch));
|
|
if (pipe != PIPE_B)
|
|
val &= ~CHV_CMN_USEDCLKCHANNEL;
|
|
else
|
|
val |= CHV_CMN_USEDCLKCHANNEL;
|
|
vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW19(ch), val);
|
|
|
|
mutex_unlock(&dev_priv->dpio_lock);
|
|
}
|
|
|
|
/*
|
|
* Native read with retry for link status and receiver capability reads for
|
|
* cases where the sink may still be asleep.
|
|
*
|
|
* Sinks are *supposed* to come up within 1ms from an off state, but we're also
|
|
* supposed to retry 3 times per the spec.
|
|
*/
|
|
static ssize_t
|
|
intel_dp_dpcd_read_wake(struct drm_dp_aux *aux, unsigned int offset,
|
|
void *buffer, size_t size)
|
|
{
|
|
ssize_t ret;
|
|
int i;
|
|
|
|
/*
|
|
* Sometime we just get the same incorrect byte repeated
|
|
* over the entire buffer. Doing just one throw away read
|
|
* initially seems to "solve" it.
|
|
*/
|
|
drm_dp_dpcd_read(aux, DP_DPCD_REV, buffer, 1);
|
|
|
|
for (i = 0; i < 3; i++) {
|
|
ret = drm_dp_dpcd_read(aux, offset, buffer, size);
|
|
if (ret == size)
|
|
return ret;
|
|
msleep(1);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Fetch AUX CH registers 0x202 - 0x207 which contain
|
|
* link status information
|
|
*/
|
|
static bool
|
|
intel_dp_get_link_status(struct intel_dp *intel_dp, uint8_t link_status[DP_LINK_STATUS_SIZE])
|
|
{
|
|
return intel_dp_dpcd_read_wake(&intel_dp->aux,
|
|
DP_LANE0_1_STATUS,
|
|
link_status,
|
|
DP_LINK_STATUS_SIZE) == DP_LINK_STATUS_SIZE;
|
|
}
|
|
|
|
/* These are source-specific values. */
|
|
static uint8_t
|
|
intel_dp_voltage_max(struct intel_dp *intel_dp)
|
|
{
|
|
struct drm_device *dev = intel_dp_to_dev(intel_dp);
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
enum port port = dp_to_dig_port(intel_dp)->port;
|
|
|
|
if (INTEL_INFO(dev)->gen >= 9) {
|
|
if (dev_priv->vbt.edp_low_vswing && port == PORT_A)
|
|
return DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
|
|
return DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
|
|
} else if (IS_VALLEYVIEW(dev))
|
|
return DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
|
|
else if (IS_GEN7(dev) && port == PORT_A)
|
|
return DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
|
|
else if (HAS_PCH_CPT(dev) && port != PORT_A)
|
|
return DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
|
|
else
|
|
return DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
|
|
}
|
|
|
|
static uint8_t
|
|
intel_dp_pre_emphasis_max(struct intel_dp *intel_dp, uint8_t voltage_swing)
|
|
{
|
|
struct drm_device *dev = intel_dp_to_dev(intel_dp);
|
|
enum port port = dp_to_dig_port(intel_dp)->port;
|
|
|
|
if (INTEL_INFO(dev)->gen >= 9) {
|
|
switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) {
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
|
|
return DP_TRAIN_PRE_EMPH_LEVEL_3;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
|
|
return DP_TRAIN_PRE_EMPH_LEVEL_2;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
|
|
return DP_TRAIN_PRE_EMPH_LEVEL_1;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
|
|
return DP_TRAIN_PRE_EMPH_LEVEL_0;
|
|
default:
|
|
return DP_TRAIN_PRE_EMPH_LEVEL_0;
|
|
}
|
|
} else if (IS_HASWELL(dev) || IS_BROADWELL(dev)) {
|
|
switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) {
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
|
|
return DP_TRAIN_PRE_EMPH_LEVEL_3;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
|
|
return DP_TRAIN_PRE_EMPH_LEVEL_2;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
|
|
return DP_TRAIN_PRE_EMPH_LEVEL_1;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
|
|
default:
|
|
return DP_TRAIN_PRE_EMPH_LEVEL_0;
|
|
}
|
|
} else if (IS_VALLEYVIEW(dev)) {
|
|
switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) {
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
|
|
return DP_TRAIN_PRE_EMPH_LEVEL_3;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
|
|
return DP_TRAIN_PRE_EMPH_LEVEL_2;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
|
|
return DP_TRAIN_PRE_EMPH_LEVEL_1;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
|
|
default:
|
|
return DP_TRAIN_PRE_EMPH_LEVEL_0;
|
|
}
|
|
} else if (IS_GEN7(dev) && port == PORT_A) {
|
|
switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) {
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
|
|
return DP_TRAIN_PRE_EMPH_LEVEL_2;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
|
|
return DP_TRAIN_PRE_EMPH_LEVEL_1;
|
|
default:
|
|
return DP_TRAIN_PRE_EMPH_LEVEL_0;
|
|
}
|
|
} else {
|
|
switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) {
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
|
|
return DP_TRAIN_PRE_EMPH_LEVEL_2;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
|
|
return DP_TRAIN_PRE_EMPH_LEVEL_2;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
|
|
return DP_TRAIN_PRE_EMPH_LEVEL_1;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
|
|
default:
|
|
return DP_TRAIN_PRE_EMPH_LEVEL_0;
|
|
}
|
|
}
|
|
}
|
|
|
|
static uint32_t intel_vlv_signal_levels(struct intel_dp *intel_dp)
|
|
{
|
|
struct drm_device *dev = intel_dp_to_dev(intel_dp);
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
|
|
struct intel_crtc *intel_crtc =
|
|
to_intel_crtc(dport->base.base.crtc);
|
|
unsigned long demph_reg_value, preemph_reg_value,
|
|
uniqtranscale_reg_value;
|
|
uint8_t train_set = intel_dp->train_set[0];
|
|
enum dpio_channel port = vlv_dport_to_channel(dport);
|
|
int pipe = intel_crtc->pipe;
|
|
|
|
switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) {
|
|
case DP_TRAIN_PRE_EMPH_LEVEL_0:
|
|
preemph_reg_value = 0x0004000;
|
|
switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
|
|
demph_reg_value = 0x2B405555;
|
|
uniqtranscale_reg_value = 0x552AB83A;
|
|
break;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
|
|
demph_reg_value = 0x2B404040;
|
|
uniqtranscale_reg_value = 0x5548B83A;
|
|
break;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
|
|
demph_reg_value = 0x2B245555;
|
|
uniqtranscale_reg_value = 0x5560B83A;
|
|
break;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
|
|
demph_reg_value = 0x2B405555;
|
|
uniqtranscale_reg_value = 0x5598DA3A;
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
break;
|
|
case DP_TRAIN_PRE_EMPH_LEVEL_1:
|
|
preemph_reg_value = 0x0002000;
|
|
switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
|
|
demph_reg_value = 0x2B404040;
|
|
uniqtranscale_reg_value = 0x5552B83A;
|
|
break;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
|
|
demph_reg_value = 0x2B404848;
|
|
uniqtranscale_reg_value = 0x5580B83A;
|
|
break;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
|
|
demph_reg_value = 0x2B404040;
|
|
uniqtranscale_reg_value = 0x55ADDA3A;
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
break;
|
|
case DP_TRAIN_PRE_EMPH_LEVEL_2:
|
|
preemph_reg_value = 0x0000000;
|
|
switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
|
|
demph_reg_value = 0x2B305555;
|
|
uniqtranscale_reg_value = 0x5570B83A;
|
|
break;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
|
|
demph_reg_value = 0x2B2B4040;
|
|
uniqtranscale_reg_value = 0x55ADDA3A;
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
break;
|
|
case DP_TRAIN_PRE_EMPH_LEVEL_3:
|
|
preemph_reg_value = 0x0006000;
|
|
switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
|
|
demph_reg_value = 0x1B405555;
|
|
uniqtranscale_reg_value = 0x55ADDA3A;
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
|
|
mutex_lock(&dev_priv->dpio_lock);
|
|
vlv_dpio_write(dev_priv, pipe, VLV_TX_DW5(port), 0x00000000);
|
|
vlv_dpio_write(dev_priv, pipe, VLV_TX_DW4(port), demph_reg_value);
|
|
vlv_dpio_write(dev_priv, pipe, VLV_TX_DW2(port),
|
|
uniqtranscale_reg_value);
|
|
vlv_dpio_write(dev_priv, pipe, VLV_TX_DW3(port), 0x0C782040);
|
|
vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW11(port), 0x00030000);
|
|
vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW9(port), preemph_reg_value);
|
|
vlv_dpio_write(dev_priv, pipe, VLV_TX_DW5(port), 0x80000000);
|
|
mutex_unlock(&dev_priv->dpio_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static uint32_t intel_chv_signal_levels(struct intel_dp *intel_dp)
|
|
{
|
|
struct drm_device *dev = intel_dp_to_dev(intel_dp);
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
|
|
struct intel_crtc *intel_crtc = to_intel_crtc(dport->base.base.crtc);
|
|
u32 deemph_reg_value, margin_reg_value, val;
|
|
uint8_t train_set = intel_dp->train_set[0];
|
|
enum dpio_channel ch = vlv_dport_to_channel(dport);
|
|
enum pipe pipe = intel_crtc->pipe;
|
|
int i;
|
|
|
|
switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) {
|
|
case DP_TRAIN_PRE_EMPH_LEVEL_0:
|
|
switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
|
|
deemph_reg_value = 128;
|
|
margin_reg_value = 52;
|
|
break;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
|
|
deemph_reg_value = 128;
|
|
margin_reg_value = 77;
|
|
break;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
|
|
deemph_reg_value = 128;
|
|
margin_reg_value = 102;
|
|
break;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
|
|
deemph_reg_value = 128;
|
|
margin_reg_value = 154;
|
|
/* FIXME extra to set for 1200 */
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
break;
|
|
case DP_TRAIN_PRE_EMPH_LEVEL_1:
|
|
switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
|
|
deemph_reg_value = 85;
|
|
margin_reg_value = 78;
|
|
break;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
|
|
deemph_reg_value = 85;
|
|
margin_reg_value = 116;
|
|
break;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
|
|
deemph_reg_value = 85;
|
|
margin_reg_value = 154;
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
break;
|
|
case DP_TRAIN_PRE_EMPH_LEVEL_2:
|
|
switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
|
|
deemph_reg_value = 64;
|
|
margin_reg_value = 104;
|
|
break;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
|
|
deemph_reg_value = 64;
|
|
margin_reg_value = 154;
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
break;
|
|
case DP_TRAIN_PRE_EMPH_LEVEL_3:
|
|
switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
|
|
deemph_reg_value = 43;
|
|
margin_reg_value = 154;
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
|
|
mutex_lock(&dev_priv->dpio_lock);
|
|
|
|
/* Clear calc init */
|
|
val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW10(ch));
|
|
val &= ~(DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3);
|
|
val &= ~(DPIO_PCS_TX1DEEMP_MASK | DPIO_PCS_TX2DEEMP_MASK);
|
|
val |= DPIO_PCS_TX1DEEMP_9P5 | DPIO_PCS_TX2DEEMP_9P5;
|
|
vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW10(ch), val);
|
|
|
|
val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW10(ch));
|
|
val &= ~(DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3);
|
|
val &= ~(DPIO_PCS_TX1DEEMP_MASK | DPIO_PCS_TX2DEEMP_MASK);
|
|
val |= DPIO_PCS_TX1DEEMP_9P5 | DPIO_PCS_TX2DEEMP_9P5;
|
|
vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW10(ch), val);
|
|
|
|
val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW9(ch));
|
|
val &= ~(DPIO_PCS_TX1MARGIN_MASK | DPIO_PCS_TX2MARGIN_MASK);
|
|
val |= DPIO_PCS_TX1MARGIN_000 | DPIO_PCS_TX2MARGIN_000;
|
|
vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW9(ch), val);
|
|
|
|
val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW9(ch));
|
|
val &= ~(DPIO_PCS_TX1MARGIN_MASK | DPIO_PCS_TX2MARGIN_MASK);
|
|
val |= DPIO_PCS_TX1MARGIN_000 | DPIO_PCS_TX2MARGIN_000;
|
|
vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW9(ch), val);
|
|
|
|
/* Program swing deemph */
|
|
for (i = 0; i < 4; i++) {
|
|
val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW4(ch, i));
|
|
val &= ~DPIO_SWING_DEEMPH9P5_MASK;
|
|
val |= deemph_reg_value << DPIO_SWING_DEEMPH9P5_SHIFT;
|
|
vlv_dpio_write(dev_priv, pipe, CHV_TX_DW4(ch, i), val);
|
|
}
|
|
|
|
/* Program swing margin */
|
|
for (i = 0; i < 4; i++) {
|
|
val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW2(ch, i));
|
|
val &= ~DPIO_SWING_MARGIN000_MASK;
|
|
val |= margin_reg_value << DPIO_SWING_MARGIN000_SHIFT;
|
|
vlv_dpio_write(dev_priv, pipe, CHV_TX_DW2(ch, i), val);
|
|
}
|
|
|
|
/* Disable unique transition scale */
|
|
for (i = 0; i < 4; i++) {
|
|
val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW3(ch, i));
|
|
val &= ~DPIO_TX_UNIQ_TRANS_SCALE_EN;
|
|
vlv_dpio_write(dev_priv, pipe, CHV_TX_DW3(ch, i), val);
|
|
}
|
|
|
|
if (((train_set & DP_TRAIN_PRE_EMPHASIS_MASK)
|
|
== DP_TRAIN_PRE_EMPH_LEVEL_0) &&
|
|
((train_set & DP_TRAIN_VOLTAGE_SWING_MASK)
|
|
== DP_TRAIN_VOLTAGE_SWING_LEVEL_3)) {
|
|
|
|
/*
|
|
* The document said it needs to set bit 27 for ch0 and bit 26
|
|
* for ch1. Might be a typo in the doc.
|
|
* For now, for this unique transition scale selection, set bit
|
|
* 27 for ch0 and ch1.
|
|
*/
|
|
for (i = 0; i < 4; i++) {
|
|
val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW3(ch, i));
|
|
val |= DPIO_TX_UNIQ_TRANS_SCALE_EN;
|
|
vlv_dpio_write(dev_priv, pipe, CHV_TX_DW3(ch, i), val);
|
|
}
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW2(ch, i));
|
|
val &= ~(0xff << DPIO_UNIQ_TRANS_SCALE_SHIFT);
|
|
val |= (0x9a << DPIO_UNIQ_TRANS_SCALE_SHIFT);
|
|
vlv_dpio_write(dev_priv, pipe, CHV_TX_DW2(ch, i), val);
|
|
}
|
|
}
|
|
|
|
/* Start swing calculation */
|
|
val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW10(ch));
|
|
val |= DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3;
|
|
vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW10(ch), val);
|
|
|
|
val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW10(ch));
|
|
val |= DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3;
|
|
vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW10(ch), val);
|
|
|
|
/* LRC Bypass */
|
|
val = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW30);
|
|
val |= DPIO_LRC_BYPASS;
|
|
vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW30, val);
|
|
|
|
mutex_unlock(&dev_priv->dpio_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
intel_get_adjust_train(struct intel_dp *intel_dp,
|
|
const uint8_t link_status[DP_LINK_STATUS_SIZE])
|
|
{
|
|
uint8_t v = 0;
|
|
uint8_t p = 0;
|
|
int lane;
|
|
uint8_t voltage_max;
|
|
uint8_t preemph_max;
|
|
|
|
for (lane = 0; lane < intel_dp->lane_count; lane++) {
|
|
uint8_t this_v = drm_dp_get_adjust_request_voltage(link_status, lane);
|
|
uint8_t this_p = drm_dp_get_adjust_request_pre_emphasis(link_status, lane);
|
|
|
|
if (this_v > v)
|
|
v = this_v;
|
|
if (this_p > p)
|
|
p = this_p;
|
|
}
|
|
|
|
voltage_max = intel_dp_voltage_max(intel_dp);
|
|
if (v >= voltage_max)
|
|
v = voltage_max | DP_TRAIN_MAX_SWING_REACHED;
|
|
|
|
preemph_max = intel_dp_pre_emphasis_max(intel_dp, v);
|
|
if (p >= preemph_max)
|
|
p = preemph_max | DP_TRAIN_MAX_PRE_EMPHASIS_REACHED;
|
|
|
|
for (lane = 0; lane < 4; lane++)
|
|
intel_dp->train_set[lane] = v | p;
|
|
}
|
|
|
|
static uint32_t
|
|
intel_gen4_signal_levels(uint8_t train_set)
|
|
{
|
|
uint32_t signal_levels = 0;
|
|
|
|
switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
|
|
default:
|
|
signal_levels |= DP_VOLTAGE_0_4;
|
|
break;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
|
|
signal_levels |= DP_VOLTAGE_0_6;
|
|
break;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
|
|
signal_levels |= DP_VOLTAGE_0_8;
|
|
break;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
|
|
signal_levels |= DP_VOLTAGE_1_2;
|
|
break;
|
|
}
|
|
switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) {
|
|
case DP_TRAIN_PRE_EMPH_LEVEL_0:
|
|
default:
|
|
signal_levels |= DP_PRE_EMPHASIS_0;
|
|
break;
|
|
case DP_TRAIN_PRE_EMPH_LEVEL_1:
|
|
signal_levels |= DP_PRE_EMPHASIS_3_5;
|
|
break;
|
|
case DP_TRAIN_PRE_EMPH_LEVEL_2:
|
|
signal_levels |= DP_PRE_EMPHASIS_6;
|
|
break;
|
|
case DP_TRAIN_PRE_EMPH_LEVEL_3:
|
|
signal_levels |= DP_PRE_EMPHASIS_9_5;
|
|
break;
|
|
}
|
|
return signal_levels;
|
|
}
|
|
|
|
/* Gen6's DP voltage swing and pre-emphasis control */
|
|
static uint32_t
|
|
intel_gen6_edp_signal_levels(uint8_t train_set)
|
|
{
|
|
int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK |
|
|
DP_TRAIN_PRE_EMPHASIS_MASK);
|
|
switch (signal_levels) {
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_0:
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_0:
|
|
return EDP_LINK_TRAIN_400_600MV_0DB_SNB_B;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_1:
|
|
return EDP_LINK_TRAIN_400MV_3_5DB_SNB_B;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_2:
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_2:
|
|
return EDP_LINK_TRAIN_400_600MV_6DB_SNB_B;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_1:
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_1:
|
|
return EDP_LINK_TRAIN_600_800MV_3_5DB_SNB_B;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_0:
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_3 | DP_TRAIN_PRE_EMPH_LEVEL_0:
|
|
return EDP_LINK_TRAIN_800_1200MV_0DB_SNB_B;
|
|
default:
|
|
DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:"
|
|
"0x%x\n", signal_levels);
|
|
return EDP_LINK_TRAIN_400_600MV_0DB_SNB_B;
|
|
}
|
|
}
|
|
|
|
/* Gen7's DP voltage swing and pre-emphasis control */
|
|
static uint32_t
|
|
intel_gen7_edp_signal_levels(uint8_t train_set)
|
|
{
|
|
int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK |
|
|
DP_TRAIN_PRE_EMPHASIS_MASK);
|
|
switch (signal_levels) {
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_0:
|
|
return EDP_LINK_TRAIN_400MV_0DB_IVB;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_1:
|
|
return EDP_LINK_TRAIN_400MV_3_5DB_IVB;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_2:
|
|
return EDP_LINK_TRAIN_400MV_6DB_IVB;
|
|
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_0:
|
|
return EDP_LINK_TRAIN_600MV_0DB_IVB;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_1:
|
|
return EDP_LINK_TRAIN_600MV_3_5DB_IVB;
|
|
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_0:
|
|
return EDP_LINK_TRAIN_800MV_0DB_IVB;
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_1:
|
|
return EDP_LINK_TRAIN_800MV_3_5DB_IVB;
|
|
|
|
default:
|
|
DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:"
|
|
"0x%x\n", signal_levels);
|
|
return EDP_LINK_TRAIN_500MV_0DB_IVB;
|
|
}
|
|
}
|
|
|
|
/* Gen7.5's (HSW) DP voltage swing and pre-emphasis control */
|
|
static uint32_t
|
|
intel_hsw_signal_levels(uint8_t train_set)
|
|
{
|
|
int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK |
|
|
DP_TRAIN_PRE_EMPHASIS_MASK);
|
|
switch (signal_levels) {
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_0:
|
|
return DDI_BUF_TRANS_SELECT(0);
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_1:
|
|
return DDI_BUF_TRANS_SELECT(1);
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_2:
|
|
return DDI_BUF_TRANS_SELECT(2);
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_3:
|
|
return DDI_BUF_TRANS_SELECT(3);
|
|
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_0:
|
|
return DDI_BUF_TRANS_SELECT(4);
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_1:
|
|
return DDI_BUF_TRANS_SELECT(5);
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_2:
|
|
return DDI_BUF_TRANS_SELECT(6);
|
|
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_0:
|
|
return DDI_BUF_TRANS_SELECT(7);
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_1:
|
|
return DDI_BUF_TRANS_SELECT(8);
|
|
|
|
case DP_TRAIN_VOLTAGE_SWING_LEVEL_3 | DP_TRAIN_PRE_EMPH_LEVEL_0:
|
|
return DDI_BUF_TRANS_SELECT(9);
|
|
default:
|
|
DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:"
|
|
"0x%x\n", signal_levels);
|
|
return DDI_BUF_TRANS_SELECT(0);
|
|
}
|
|
}
|
|
|
|
/* Properly updates "DP" with the correct signal levels. */
|
|
static void
|
|
intel_dp_set_signal_levels(struct intel_dp *intel_dp, uint32_t *DP)
|
|
{
|
|
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
|
|
enum port port = intel_dig_port->port;
|
|
struct drm_device *dev = intel_dig_port->base.base.dev;
|
|
uint32_t signal_levels, mask;
|
|
uint8_t train_set = intel_dp->train_set[0];
|
|
|
|
if (IS_HASWELL(dev) || IS_BROADWELL(dev) || INTEL_INFO(dev)->gen >= 9) {
|
|
signal_levels = intel_hsw_signal_levels(train_set);
|
|
mask = DDI_BUF_EMP_MASK;
|
|
} else if (IS_CHERRYVIEW(dev)) {
|
|
signal_levels = intel_chv_signal_levels(intel_dp);
|
|
mask = 0;
|
|
} else if (IS_VALLEYVIEW(dev)) {
|
|
signal_levels = intel_vlv_signal_levels(intel_dp);
|
|
mask = 0;
|
|
} else if (IS_GEN7(dev) && port == PORT_A) {
|
|
signal_levels = intel_gen7_edp_signal_levels(train_set);
|
|
mask = EDP_LINK_TRAIN_VOL_EMP_MASK_IVB;
|
|
} else if (IS_GEN6(dev) && port == PORT_A) {
|
|
signal_levels = intel_gen6_edp_signal_levels(train_set);
|
|
mask = EDP_LINK_TRAIN_VOL_EMP_MASK_SNB;
|
|
} else {
|
|
signal_levels = intel_gen4_signal_levels(train_set);
|
|
mask = DP_VOLTAGE_MASK | DP_PRE_EMPHASIS_MASK;
|
|
}
|
|
|
|
DRM_DEBUG_KMS("Using signal levels %08x\n", signal_levels);
|
|
|
|
*DP = (*DP & ~mask) | signal_levels;
|
|
}
|
|
|
|
static bool
|
|
intel_dp_set_link_train(struct intel_dp *intel_dp,
|
|
uint32_t *DP,
|
|
uint8_t dp_train_pat)
|
|
{
|
|
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
|
|
struct drm_device *dev = intel_dig_port->base.base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
uint8_t buf[sizeof(intel_dp->train_set) + 1];
|
|
int ret, len;
|
|
|
|
_intel_dp_set_link_train(intel_dp, DP, dp_train_pat);
|
|
|
|
I915_WRITE(intel_dp->output_reg, *DP);
|
|
POSTING_READ(intel_dp->output_reg);
|
|
|
|
buf[0] = dp_train_pat;
|
|
if ((dp_train_pat & DP_TRAINING_PATTERN_MASK) ==
|
|
DP_TRAINING_PATTERN_DISABLE) {
|
|
/* don't write DP_TRAINING_LANEx_SET on disable */
|
|
len = 1;
|
|
} else {
|
|
/* DP_TRAINING_LANEx_SET follow DP_TRAINING_PATTERN_SET */
|
|
memcpy(buf + 1, intel_dp->train_set, intel_dp->lane_count);
|
|
len = intel_dp->lane_count + 1;
|
|
}
|
|
|
|
ret = drm_dp_dpcd_write(&intel_dp->aux, DP_TRAINING_PATTERN_SET,
|
|
buf, len);
|
|
|
|
return ret == len;
|
|
}
|
|
|
|
static bool
|
|
intel_dp_reset_link_train(struct intel_dp *intel_dp, uint32_t *DP,
|
|
uint8_t dp_train_pat)
|
|
{
|
|
memset(intel_dp->train_set, 0, sizeof(intel_dp->train_set));
|
|
intel_dp_set_signal_levels(intel_dp, DP);
|
|
return intel_dp_set_link_train(intel_dp, DP, dp_train_pat);
|
|
}
|
|
|
|
static bool
|
|
intel_dp_update_link_train(struct intel_dp *intel_dp, uint32_t *DP,
|
|
const uint8_t link_status[DP_LINK_STATUS_SIZE])
|
|
{
|
|
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
|
|
struct drm_device *dev = intel_dig_port->base.base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
int ret;
|
|
|
|
intel_get_adjust_train(intel_dp, link_status);
|
|
intel_dp_set_signal_levels(intel_dp, DP);
|
|
|
|
I915_WRITE(intel_dp->output_reg, *DP);
|
|
POSTING_READ(intel_dp->output_reg);
|
|
|
|
ret = drm_dp_dpcd_write(&intel_dp->aux, DP_TRAINING_LANE0_SET,
|
|
intel_dp->train_set, intel_dp->lane_count);
|
|
|
|
return ret == intel_dp->lane_count;
|
|
}
|
|
|
|
static void intel_dp_set_idle_link_train(struct intel_dp *intel_dp)
|
|
{
|
|
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
|
|
struct drm_device *dev = intel_dig_port->base.base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
enum port port = intel_dig_port->port;
|
|
uint32_t val;
|
|
|
|
if (!HAS_DDI(dev))
|
|
return;
|
|
|
|
val = I915_READ(DP_TP_CTL(port));
|
|
val &= ~DP_TP_CTL_LINK_TRAIN_MASK;
|
|
val |= DP_TP_CTL_LINK_TRAIN_IDLE;
|
|
I915_WRITE(DP_TP_CTL(port), val);
|
|
|
|
/*
|
|
* On PORT_A we can have only eDP in SST mode. There the only reason
|
|
* we need to set idle transmission mode is to work around a HW issue
|
|
* where we enable the pipe while not in idle link-training mode.
|
|
* In this case there is requirement to wait for a minimum number of
|
|
* idle patterns to be sent.
|
|
*/
|
|
if (port == PORT_A)
|
|
return;
|
|
|
|
if (wait_for((I915_READ(DP_TP_STATUS(port)) & DP_TP_STATUS_IDLE_DONE),
|
|
1))
|
|
DRM_ERROR("Timed out waiting for DP idle patterns\n");
|
|
}
|
|
|
|
/* Enable corresponding port and start training pattern 1 */
|
|
void
|
|
intel_dp_start_link_train(struct intel_dp *intel_dp)
|
|
{
|
|
struct drm_encoder *encoder = &dp_to_dig_port(intel_dp)->base.base;
|
|
struct drm_device *dev = encoder->dev;
|
|
int i;
|
|
uint8_t voltage;
|
|
int voltage_tries, loop_tries;
|
|
uint32_t DP = intel_dp->DP;
|
|
uint8_t link_config[2];
|
|
|
|
if (HAS_DDI(dev))
|
|
intel_ddi_prepare_link_retrain(encoder);
|
|
|
|
/* Write the link configuration data */
|
|
link_config[0] = intel_dp->link_bw;
|
|
link_config[1] = intel_dp->lane_count;
|
|
if (drm_dp_enhanced_frame_cap(intel_dp->dpcd))
|
|
link_config[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN;
|
|
drm_dp_dpcd_write(&intel_dp->aux, DP_LINK_BW_SET, link_config, 2);
|
|
if (intel_dp->num_sink_rates)
|
|
drm_dp_dpcd_write(&intel_dp->aux, DP_LINK_RATE_SET,
|
|
&intel_dp->rate_select, 1);
|
|
|
|
link_config[0] = 0;
|
|
link_config[1] = DP_SET_ANSI_8B10B;
|
|
drm_dp_dpcd_write(&intel_dp->aux, DP_DOWNSPREAD_CTRL, link_config, 2);
|
|
|
|
DP |= DP_PORT_EN;
|
|
|
|
/* clock recovery */
|
|
if (!intel_dp_reset_link_train(intel_dp, &DP,
|
|
DP_TRAINING_PATTERN_1 |
|
|
DP_LINK_SCRAMBLING_DISABLE)) {
|
|
DRM_ERROR("failed to enable link training\n");
|
|
return;
|
|
}
|
|
|
|
voltage = 0xff;
|
|
voltage_tries = 0;
|
|
loop_tries = 0;
|
|
for (;;) {
|
|
uint8_t link_status[DP_LINK_STATUS_SIZE];
|
|
|
|
drm_dp_link_train_clock_recovery_delay(intel_dp->dpcd);
|
|
if (!intel_dp_get_link_status(intel_dp, link_status)) {
|
|
DRM_ERROR("failed to get link status\n");
|
|
break;
|
|
}
|
|
|
|
if (drm_dp_clock_recovery_ok(link_status, intel_dp->lane_count)) {
|
|
DRM_DEBUG_KMS("clock recovery OK\n");
|
|
break;
|
|
}
|
|
|
|
/* Check to see if we've tried the max voltage */
|
|
for (i = 0; i < intel_dp->lane_count; i++)
|
|
if ((intel_dp->train_set[i] & DP_TRAIN_MAX_SWING_REACHED) == 0)
|
|
break;
|
|
if (i == intel_dp->lane_count) {
|
|
++loop_tries;
|
|
if (loop_tries == 5) {
|
|
DRM_ERROR("too many full retries, give up\n");
|
|
break;
|
|
}
|
|
intel_dp_reset_link_train(intel_dp, &DP,
|
|
DP_TRAINING_PATTERN_1 |
|
|
DP_LINK_SCRAMBLING_DISABLE);
|
|
voltage_tries = 0;
|
|
continue;
|
|
}
|
|
|
|
/* Check to see if we've tried the same voltage 5 times */
|
|
if ((intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK) == voltage) {
|
|
++voltage_tries;
|
|
if (voltage_tries == 5) {
|
|
DRM_ERROR("too many voltage retries, give up\n");
|
|
break;
|
|
}
|
|
} else
|
|
voltage_tries = 0;
|
|
voltage = intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK;
|
|
|
|
/* Update training set as requested by target */
|
|
if (!intel_dp_update_link_train(intel_dp, &DP, link_status)) {
|
|
DRM_ERROR("failed to update link training\n");
|
|
break;
|
|
}
|
|
}
|
|
|
|
intel_dp->DP = DP;
|
|
}
|
|
|
|
void
|
|
intel_dp_complete_link_train(struct intel_dp *intel_dp)
|
|
{
|
|
bool channel_eq = false;
|
|
int tries, cr_tries;
|
|
uint32_t DP = intel_dp->DP;
|
|
uint32_t training_pattern = DP_TRAINING_PATTERN_2;
|
|
|
|
/* Training Pattern 3 for HBR2 ot 1.2 devices that support it*/
|
|
if (intel_dp->link_bw == DP_LINK_BW_5_4 || intel_dp->use_tps3)
|
|
training_pattern = DP_TRAINING_PATTERN_3;
|
|
|
|
/* channel equalization */
|
|
if (!intel_dp_set_link_train(intel_dp, &DP,
|
|
training_pattern |
|
|
DP_LINK_SCRAMBLING_DISABLE)) {
|
|
DRM_ERROR("failed to start channel equalization\n");
|
|
return;
|
|
}
|
|
|
|
tries = 0;
|
|
cr_tries = 0;
|
|
channel_eq = false;
|
|
for (;;) {
|
|
uint8_t link_status[DP_LINK_STATUS_SIZE];
|
|
|
|
if (cr_tries > 5) {
|
|
DRM_ERROR("failed to train DP, aborting\n");
|
|
break;
|
|
}
|
|
|
|
drm_dp_link_train_channel_eq_delay(intel_dp->dpcd);
|
|
if (!intel_dp_get_link_status(intel_dp, link_status)) {
|
|
DRM_ERROR("failed to get link status\n");
|
|
break;
|
|
}
|
|
|
|
/* Make sure clock is still ok */
|
|
if (!drm_dp_clock_recovery_ok(link_status, intel_dp->lane_count)) {
|
|
intel_dp_start_link_train(intel_dp);
|
|
intel_dp_set_link_train(intel_dp, &DP,
|
|
training_pattern |
|
|
DP_LINK_SCRAMBLING_DISABLE);
|
|
cr_tries++;
|
|
continue;
|
|
}
|
|
|
|
if (drm_dp_channel_eq_ok(link_status, intel_dp->lane_count)) {
|
|
channel_eq = true;
|
|
break;
|
|
}
|
|
|
|
/* Try 5 times, then try clock recovery if that fails */
|
|
if (tries > 5) {
|
|
intel_dp_start_link_train(intel_dp);
|
|
intel_dp_set_link_train(intel_dp, &DP,
|
|
training_pattern |
|
|
DP_LINK_SCRAMBLING_DISABLE);
|
|
tries = 0;
|
|
cr_tries++;
|
|
continue;
|
|
}
|
|
|
|
/* Update training set as requested by target */
|
|
if (!intel_dp_update_link_train(intel_dp, &DP, link_status)) {
|
|
DRM_ERROR("failed to update link training\n");
|
|
break;
|
|
}
|
|
++tries;
|
|
}
|
|
|
|
intel_dp_set_idle_link_train(intel_dp);
|
|
|
|
intel_dp->DP = DP;
|
|
|
|
if (channel_eq)
|
|
DRM_DEBUG_KMS("Channel EQ done. DP Training successful\n");
|
|
|
|
}
|
|
|
|
void intel_dp_stop_link_train(struct intel_dp *intel_dp)
|
|
{
|
|
intel_dp_set_link_train(intel_dp, &intel_dp->DP,
|
|
DP_TRAINING_PATTERN_DISABLE);
|
|
}
|
|
|
|
static void
|
|
intel_dp_link_down(struct intel_dp *intel_dp)
|
|
{
|
|
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
|
|
enum port port = intel_dig_port->port;
|
|
struct drm_device *dev = intel_dig_port->base.base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
uint32_t DP = intel_dp->DP;
|
|
|
|
if (WARN_ON(HAS_DDI(dev)))
|
|
return;
|
|
|
|
if (WARN_ON((I915_READ(intel_dp->output_reg) & DP_PORT_EN) == 0))
|
|
return;
|
|
|
|
DRM_DEBUG_KMS("\n");
|
|
|
|
if (HAS_PCH_CPT(dev) && (IS_GEN7(dev) || port != PORT_A)) {
|
|
DP &= ~DP_LINK_TRAIN_MASK_CPT;
|
|
I915_WRITE(intel_dp->output_reg, DP | DP_LINK_TRAIN_PAT_IDLE_CPT);
|
|
} else {
|
|
if (IS_CHERRYVIEW(dev))
|
|
DP &= ~DP_LINK_TRAIN_MASK_CHV;
|
|
else
|
|
DP &= ~DP_LINK_TRAIN_MASK;
|
|
I915_WRITE(intel_dp->output_reg, DP | DP_LINK_TRAIN_PAT_IDLE);
|
|
}
|
|
POSTING_READ(intel_dp->output_reg);
|
|
|
|
if (HAS_PCH_IBX(dev) &&
|
|
I915_READ(intel_dp->output_reg) & DP_PIPEB_SELECT) {
|
|
/* Hardware workaround: leaving our transcoder select
|
|
* set to transcoder B while it's off will prevent the
|
|
* corresponding HDMI output on transcoder A.
|
|
*
|
|
* Combine this with another hardware workaround:
|
|
* transcoder select bit can only be cleared while the
|
|
* port is enabled.
|
|
*/
|
|
DP &= ~DP_PIPEB_SELECT;
|
|
I915_WRITE(intel_dp->output_reg, DP);
|
|
POSTING_READ(intel_dp->output_reg);
|
|
}
|
|
|
|
DP &= ~DP_AUDIO_OUTPUT_ENABLE;
|
|
I915_WRITE(intel_dp->output_reg, DP & ~DP_PORT_EN);
|
|
POSTING_READ(intel_dp->output_reg);
|
|
msleep(intel_dp->panel_power_down_delay);
|
|
}
|
|
|
|
static bool
|
|
intel_dp_get_dpcd(struct intel_dp *intel_dp)
|
|
{
|
|
struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
|
|
struct drm_device *dev = dig_port->base.base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
uint8_t rev;
|
|
|
|
if (intel_dp_dpcd_read_wake(&intel_dp->aux, 0x000, intel_dp->dpcd,
|
|
sizeof(intel_dp->dpcd)) < 0)
|
|
return false; /* aux transfer failed */
|
|
|
|
DRM_DEBUG_KMS("DPCD: %*ph\n", (int) sizeof(intel_dp->dpcd), intel_dp->dpcd);
|
|
|
|
if (intel_dp->dpcd[DP_DPCD_REV] == 0)
|
|
return false; /* DPCD not present */
|
|
|
|
/* Check if the panel supports PSR */
|
|
memset(intel_dp->psr_dpcd, 0, sizeof(intel_dp->psr_dpcd));
|
|
if (is_edp(intel_dp)) {
|
|
intel_dp_dpcd_read_wake(&intel_dp->aux, DP_PSR_SUPPORT,
|
|
intel_dp->psr_dpcd,
|
|
sizeof(intel_dp->psr_dpcd));
|
|
if (intel_dp->psr_dpcd[0] & DP_PSR_IS_SUPPORTED) {
|
|
dev_priv->psr.sink_support = true;
|
|
DRM_DEBUG_KMS("Detected EDP PSR Panel.\n");
|
|
}
|
|
}
|
|
|
|
/* Training Pattern 3 support, both source and sink */
|
|
if (intel_dp->dpcd[DP_DPCD_REV] >= 0x12 &&
|
|
intel_dp->dpcd[DP_MAX_LANE_COUNT] & DP_TPS3_SUPPORTED &&
|
|
(IS_HASWELL(dev_priv) || INTEL_INFO(dev_priv)->gen >= 8)) {
|
|
intel_dp->use_tps3 = true;
|
|
DRM_DEBUG_KMS("Displayport TPS3 supported\n");
|
|
} else
|
|
intel_dp->use_tps3 = false;
|
|
|
|
/* Intermediate frequency support */
|
|
if (is_edp(intel_dp) &&
|
|
(intel_dp->dpcd[DP_EDP_CONFIGURATION_CAP] & DP_DPCD_DISPLAY_CONTROL_CAPABLE) &&
|
|
(intel_dp_dpcd_read_wake(&intel_dp->aux, DP_EDP_DPCD_REV, &rev, 1) == 1) &&
|
|
(rev >= 0x03)) { /* eDp v1.4 or higher */
|
|
__le16 sink_rates[DP_MAX_SUPPORTED_RATES];
|
|
int i;
|
|
|
|
intel_dp_dpcd_read_wake(&intel_dp->aux,
|
|
DP_SUPPORTED_LINK_RATES,
|
|
sink_rates,
|
|
sizeof(sink_rates));
|
|
|
|
for (i = 0; i < ARRAY_SIZE(sink_rates); i++) {
|
|
int val = le16_to_cpu(sink_rates[i]);
|
|
|
|
if (val == 0)
|
|
break;
|
|
|
|
/* Value read is in kHz while drm clock is saved in deca-kHz */
|
|
intel_dp->sink_rates[i] = (val * 200) / 10;
|
|
}
|
|
intel_dp->num_sink_rates = i;
|
|
}
|
|
|
|
intel_dp_print_rates(intel_dp);
|
|
|
|
if (!(intel_dp->dpcd[DP_DOWNSTREAMPORT_PRESENT] &
|
|
DP_DWN_STRM_PORT_PRESENT))
|
|
return true; /* native DP sink */
|
|
|
|
if (intel_dp->dpcd[DP_DPCD_REV] == 0x10)
|
|
return true; /* no per-port downstream info */
|
|
|
|
if (intel_dp_dpcd_read_wake(&intel_dp->aux, DP_DOWNSTREAM_PORT_0,
|
|
intel_dp->downstream_ports,
|
|
DP_MAX_DOWNSTREAM_PORTS) < 0)
|
|
return false; /* downstream port status fetch failed */
|
|
|
|
return true;
|
|
}
|
|
|
|
static void
|
|
intel_dp_probe_oui(struct intel_dp *intel_dp)
|
|
{
|
|
u8 buf[3];
|
|
|
|
if (!(intel_dp->dpcd[DP_DOWN_STREAM_PORT_COUNT] & DP_OUI_SUPPORT))
|
|
return;
|
|
|
|
if (intel_dp_dpcd_read_wake(&intel_dp->aux, DP_SINK_OUI, buf, 3) == 3)
|
|
DRM_DEBUG_KMS("Sink OUI: %02hx%02hx%02hx\n",
|
|
buf[0], buf[1], buf[2]);
|
|
|
|
if (intel_dp_dpcd_read_wake(&intel_dp->aux, DP_BRANCH_OUI, buf, 3) == 3)
|
|
DRM_DEBUG_KMS("Branch OUI: %02hx%02hx%02hx\n",
|
|
buf[0], buf[1], buf[2]);
|
|
}
|
|
|
|
static bool
|
|
intel_dp_probe_mst(struct intel_dp *intel_dp)
|
|
{
|
|
u8 buf[1];
|
|
|
|
if (!intel_dp->can_mst)
|
|
return false;
|
|
|
|
if (intel_dp->dpcd[DP_DPCD_REV] < 0x12)
|
|
return false;
|
|
|
|
if (intel_dp_dpcd_read_wake(&intel_dp->aux, DP_MSTM_CAP, buf, 1)) {
|
|
if (buf[0] & DP_MST_CAP) {
|
|
DRM_DEBUG_KMS("Sink is MST capable\n");
|
|
intel_dp->is_mst = true;
|
|
} else {
|
|
DRM_DEBUG_KMS("Sink is not MST capable\n");
|
|
intel_dp->is_mst = false;
|
|
}
|
|
}
|
|
|
|
drm_dp_mst_topology_mgr_set_mst(&intel_dp->mst_mgr, intel_dp->is_mst);
|
|
return intel_dp->is_mst;
|
|
}
|
|
|
|
int intel_dp_sink_crc(struct intel_dp *intel_dp, u8 *crc)
|
|
{
|
|
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
|
|
struct drm_device *dev = intel_dig_port->base.base.dev;
|
|
struct intel_crtc *intel_crtc =
|
|
to_intel_crtc(intel_dig_port->base.base.crtc);
|
|
u8 buf;
|
|
int test_crc_count;
|
|
int attempts = 6;
|
|
|
|
if (drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_SINK_MISC, &buf) < 0)
|
|
return -EIO;
|
|
|
|
if (!(buf & DP_TEST_CRC_SUPPORTED))
|
|
return -ENOTTY;
|
|
|
|
if (drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_SINK, &buf) < 0)
|
|
return -EIO;
|
|
|
|
if (drm_dp_dpcd_writeb(&intel_dp->aux, DP_TEST_SINK,
|
|
buf | DP_TEST_SINK_START) < 0)
|
|
return -EIO;
|
|
|
|
if (drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_SINK_MISC, &buf) < 0)
|
|
return -EIO;
|
|
test_crc_count = buf & DP_TEST_COUNT_MASK;
|
|
|
|
do {
|
|
if (drm_dp_dpcd_readb(&intel_dp->aux,
|
|
DP_TEST_SINK_MISC, &buf) < 0)
|
|
return -EIO;
|
|
intel_wait_for_vblank(dev, intel_crtc->pipe);
|
|
} while (--attempts && (buf & DP_TEST_COUNT_MASK) == test_crc_count);
|
|
|
|
if (attempts == 0) {
|
|
DRM_DEBUG_KMS("Panel is unable to calculate CRC after 6 vblanks\n");
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
if (drm_dp_dpcd_read(&intel_dp->aux, DP_TEST_CRC_R_CR, crc, 6) < 0)
|
|
return -EIO;
|
|
|
|
if (drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_SINK, &buf) < 0)
|
|
return -EIO;
|
|
if (drm_dp_dpcd_writeb(&intel_dp->aux, DP_TEST_SINK,
|
|
buf & ~DP_TEST_SINK_START) < 0)
|
|
return -EIO;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool
|
|
intel_dp_get_sink_irq(struct intel_dp *intel_dp, u8 *sink_irq_vector)
|
|
{
|
|
return intel_dp_dpcd_read_wake(&intel_dp->aux,
|
|
DP_DEVICE_SERVICE_IRQ_VECTOR,
|
|
sink_irq_vector, 1) == 1;
|
|
}
|
|
|
|
static bool
|
|
intel_dp_get_sink_irq_esi(struct intel_dp *intel_dp, u8 *sink_irq_vector)
|
|
{
|
|
int ret;
|
|
|
|
ret = intel_dp_dpcd_read_wake(&intel_dp->aux,
|
|
DP_SINK_COUNT_ESI,
|
|
sink_irq_vector, 14);
|
|
if (ret != 14)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static void
|
|
intel_dp_handle_test_request(struct intel_dp *intel_dp)
|
|
{
|
|
/* NAK by default */
|
|
drm_dp_dpcd_writeb(&intel_dp->aux, DP_TEST_RESPONSE, DP_TEST_NAK);
|
|
}
|
|
|
|
static int
|
|
intel_dp_check_mst_status(struct intel_dp *intel_dp)
|
|
{
|
|
bool bret;
|
|
|
|
if (intel_dp->is_mst) {
|
|
u8 esi[16] = { 0 };
|
|
int ret = 0;
|
|
int retry;
|
|
bool handled;
|
|
bret = intel_dp_get_sink_irq_esi(intel_dp, esi);
|
|
go_again:
|
|
if (bret == true) {
|
|
|
|
/* check link status - esi[10] = 0x200c */
|
|
if (intel_dp->active_mst_links && !drm_dp_channel_eq_ok(&esi[10], intel_dp->lane_count)) {
|
|
DRM_DEBUG_KMS("channel EQ not ok, retraining\n");
|
|
intel_dp_start_link_train(intel_dp);
|
|
intel_dp_complete_link_train(intel_dp);
|
|
intel_dp_stop_link_train(intel_dp);
|
|
}
|
|
|
|
DRM_DEBUG_KMS("got esi %3ph\n", esi);
|
|
ret = drm_dp_mst_hpd_irq(&intel_dp->mst_mgr, esi, &handled);
|
|
|
|
if (handled) {
|
|
for (retry = 0; retry < 3; retry++) {
|
|
int wret;
|
|
wret = drm_dp_dpcd_write(&intel_dp->aux,
|
|
DP_SINK_COUNT_ESI+1,
|
|
&esi[1], 3);
|
|
if (wret == 3) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
bret = intel_dp_get_sink_irq_esi(intel_dp, esi);
|
|
if (bret == true) {
|
|
DRM_DEBUG_KMS("got esi2 %3ph\n", esi);
|
|
goto go_again;
|
|
}
|
|
} else
|
|
ret = 0;
|
|
|
|
return ret;
|
|
} else {
|
|
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
|
|
DRM_DEBUG_KMS("failed to get ESI - device may have failed\n");
|
|
intel_dp->is_mst = false;
|
|
drm_dp_mst_topology_mgr_set_mst(&intel_dp->mst_mgr, intel_dp->is_mst);
|
|
/* send a hotplug event */
|
|
drm_kms_helper_hotplug_event(intel_dig_port->base.base.dev);
|
|
}
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* According to DP spec
|
|
* 5.1.2:
|
|
* 1. Read DPCD
|
|
* 2. Configure link according to Receiver Capabilities
|
|
* 3. Use Link Training from 2.5.3.3 and 3.5.1.3
|
|
* 4. Check link status on receipt of hot-plug interrupt
|
|
*/
|
|
static void
|
|
intel_dp_check_link_status(struct intel_dp *intel_dp)
|
|
{
|
|
struct drm_device *dev = intel_dp_to_dev(intel_dp);
|
|
struct intel_encoder *intel_encoder = &dp_to_dig_port(intel_dp)->base;
|
|
u8 sink_irq_vector;
|
|
u8 link_status[DP_LINK_STATUS_SIZE];
|
|
|
|
WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
|
|
|
|
if (!intel_encoder->connectors_active)
|
|
return;
|
|
|
|
if (WARN_ON(!intel_encoder->base.crtc))
|
|
return;
|
|
|
|
if (!to_intel_crtc(intel_encoder->base.crtc)->active)
|
|
return;
|
|
|
|
/* Try to read receiver status if the link appears to be up */
|
|
if (!intel_dp_get_link_status(intel_dp, link_status)) {
|
|
return;
|
|
}
|
|
|
|
/* Now read the DPCD to see if it's actually running */
|
|
if (!intel_dp_get_dpcd(intel_dp)) {
|
|
return;
|
|
}
|
|
|
|
/* Try to read the source of the interrupt */
|
|
if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 &&
|
|
intel_dp_get_sink_irq(intel_dp, &sink_irq_vector)) {
|
|
/* Clear interrupt source */
|
|
drm_dp_dpcd_writeb(&intel_dp->aux,
|
|
DP_DEVICE_SERVICE_IRQ_VECTOR,
|
|
sink_irq_vector);
|
|
|
|
if (sink_irq_vector & DP_AUTOMATED_TEST_REQUEST)
|
|
intel_dp_handle_test_request(intel_dp);
|
|
if (sink_irq_vector & (DP_CP_IRQ | DP_SINK_SPECIFIC_IRQ))
|
|
DRM_DEBUG_DRIVER("CP or sink specific irq unhandled\n");
|
|
}
|
|
|
|
if (!drm_dp_channel_eq_ok(link_status, intel_dp->lane_count)) {
|
|
DRM_DEBUG_KMS("%s: channel EQ not ok, retraining\n",
|
|
intel_encoder->base.name);
|
|
intel_dp_start_link_train(intel_dp);
|
|
intel_dp_complete_link_train(intel_dp);
|
|
intel_dp_stop_link_train(intel_dp);
|
|
}
|
|
}
|
|
|
|
/* XXX this is probably wrong for multiple downstream ports */
|
|
static enum drm_connector_status
|
|
intel_dp_detect_dpcd(struct intel_dp *intel_dp)
|
|
{
|
|
uint8_t *dpcd = intel_dp->dpcd;
|
|
uint8_t type;
|
|
|
|
if (!intel_dp_get_dpcd(intel_dp))
|
|
return connector_status_disconnected;
|
|
|
|
/* if there's no downstream port, we're done */
|
|
if (!(dpcd[DP_DOWNSTREAMPORT_PRESENT] & DP_DWN_STRM_PORT_PRESENT))
|
|
return connector_status_connected;
|
|
|
|
/* If we're HPD-aware, SINK_COUNT changes dynamically */
|
|
if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 &&
|
|
intel_dp->downstream_ports[0] & DP_DS_PORT_HPD) {
|
|
uint8_t reg;
|
|
|
|
if (intel_dp_dpcd_read_wake(&intel_dp->aux, DP_SINK_COUNT,
|
|
®, 1) < 0)
|
|
return connector_status_unknown;
|
|
|
|
return DP_GET_SINK_COUNT(reg) ? connector_status_connected
|
|
: connector_status_disconnected;
|
|
}
|
|
|
|
/* If no HPD, poke DDC gently */
|
|
if (drm_probe_ddc(&intel_dp->aux.ddc))
|
|
return connector_status_connected;
|
|
|
|
/* Well we tried, say unknown for unreliable port types */
|
|
if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11) {
|
|
type = intel_dp->downstream_ports[0] & DP_DS_PORT_TYPE_MASK;
|
|
if (type == DP_DS_PORT_TYPE_VGA ||
|
|
type == DP_DS_PORT_TYPE_NON_EDID)
|
|
return connector_status_unknown;
|
|
} else {
|
|
type = intel_dp->dpcd[DP_DOWNSTREAMPORT_PRESENT] &
|
|
DP_DWN_STRM_PORT_TYPE_MASK;
|
|
if (type == DP_DWN_STRM_PORT_TYPE_ANALOG ||
|
|
type == DP_DWN_STRM_PORT_TYPE_OTHER)
|
|
return connector_status_unknown;
|
|
}
|
|
|
|
/* Anything else is out of spec, warn and ignore */
|
|
DRM_DEBUG_KMS("Broken DP branch device, ignoring\n");
|
|
return connector_status_disconnected;
|
|
}
|
|
|
|
static enum drm_connector_status
|
|
edp_detect(struct intel_dp *intel_dp)
|
|
{
|
|
struct drm_device *dev = intel_dp_to_dev(intel_dp);
|
|
enum drm_connector_status status;
|
|
|
|
status = intel_panel_detect(dev);
|
|
if (status == connector_status_unknown)
|
|
status = connector_status_connected;
|
|
|
|
return status;
|
|
}
|
|
|
|
static enum drm_connector_status
|
|
ironlake_dp_detect(struct intel_dp *intel_dp)
|
|
{
|
|
struct drm_device *dev = intel_dp_to_dev(intel_dp);
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
|
|
|
|
if (!ibx_digital_port_connected(dev_priv, intel_dig_port))
|
|
return connector_status_disconnected;
|
|
|
|
return intel_dp_detect_dpcd(intel_dp);
|
|
}
|
|
|
|
static int g4x_digital_port_connected(struct drm_device *dev,
|
|
struct intel_digital_port *intel_dig_port)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
uint32_t bit;
|
|
|
|
if (IS_VALLEYVIEW(dev)) {
|
|
switch (intel_dig_port->port) {
|
|
case PORT_B:
|
|
bit = PORTB_HOTPLUG_LIVE_STATUS_VLV;
|
|
break;
|
|
case PORT_C:
|
|
bit = PORTC_HOTPLUG_LIVE_STATUS_VLV;
|
|
break;
|
|
case PORT_D:
|
|
bit = PORTD_HOTPLUG_LIVE_STATUS_VLV;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
} else {
|
|
switch (intel_dig_port->port) {
|
|
case PORT_B:
|
|
bit = PORTB_HOTPLUG_LIVE_STATUS_G4X;
|
|
break;
|
|
case PORT_C:
|
|
bit = PORTC_HOTPLUG_LIVE_STATUS_G4X;
|
|
break;
|
|
case PORT_D:
|
|
bit = PORTD_HOTPLUG_LIVE_STATUS_G4X;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
if ((I915_READ(PORT_HOTPLUG_STAT) & bit) == 0)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
static enum drm_connector_status
|
|
g4x_dp_detect(struct intel_dp *intel_dp)
|
|
{
|
|
struct drm_device *dev = intel_dp_to_dev(intel_dp);
|
|
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
|
|
int ret;
|
|
|
|
/* Can't disconnect eDP, but you can close the lid... */
|
|
if (is_edp(intel_dp)) {
|
|
enum drm_connector_status status;
|
|
|
|
status = intel_panel_detect(dev);
|
|
if (status == connector_status_unknown)
|
|
status = connector_status_connected;
|
|
return status;
|
|
}
|
|
|
|
ret = g4x_digital_port_connected(dev, intel_dig_port);
|
|
if (ret == -EINVAL)
|
|
return connector_status_unknown;
|
|
else if (ret == 0)
|
|
return connector_status_disconnected;
|
|
|
|
return intel_dp_detect_dpcd(intel_dp);
|
|
}
|
|
|
|
static struct edid *
|
|
intel_dp_get_edid(struct intel_dp *intel_dp)
|
|
{
|
|
struct intel_connector *intel_connector = intel_dp->attached_connector;
|
|
|
|
/* use cached edid if we have one */
|
|
if (intel_connector->edid) {
|
|
/* invalid edid */
|
|
if (IS_ERR(intel_connector->edid))
|
|
return NULL;
|
|
|
|
return drm_edid_duplicate(intel_connector->edid);
|
|
} else
|
|
return drm_get_edid(&intel_connector->base,
|
|
&intel_dp->aux.ddc);
|
|
}
|
|
|
|
static void
|
|
intel_dp_set_edid(struct intel_dp *intel_dp)
|
|
{
|
|
struct intel_connector *intel_connector = intel_dp->attached_connector;
|
|
struct edid *edid;
|
|
|
|
edid = intel_dp_get_edid(intel_dp);
|
|
intel_connector->detect_edid = edid;
|
|
|
|
if (intel_dp->force_audio != HDMI_AUDIO_AUTO)
|
|
intel_dp->has_audio = intel_dp->force_audio == HDMI_AUDIO_ON;
|
|
else
|
|
intel_dp->has_audio = drm_detect_monitor_audio(edid);
|
|
}
|
|
|
|
static void
|
|
intel_dp_unset_edid(struct intel_dp *intel_dp)
|
|
{
|
|
struct intel_connector *intel_connector = intel_dp->attached_connector;
|
|
|
|
kfree(intel_connector->detect_edid);
|
|
intel_connector->detect_edid = NULL;
|
|
|
|
intel_dp->has_audio = false;
|
|
}
|
|
|
|
static enum intel_display_power_domain
|
|
intel_dp_power_get(struct intel_dp *dp)
|
|
{
|
|
struct intel_encoder *encoder = &dp_to_dig_port(dp)->base;
|
|
enum intel_display_power_domain power_domain;
|
|
|
|
power_domain = intel_display_port_power_domain(encoder);
|
|
intel_display_power_get(to_i915(encoder->base.dev), power_domain);
|
|
|
|
return power_domain;
|
|
}
|
|
|
|
static void
|
|
intel_dp_power_put(struct intel_dp *dp,
|
|
enum intel_display_power_domain power_domain)
|
|
{
|
|
struct intel_encoder *encoder = &dp_to_dig_port(dp)->base;
|
|
intel_display_power_put(to_i915(encoder->base.dev), power_domain);
|
|
}
|
|
|
|
static enum drm_connector_status
|
|
intel_dp_detect(struct drm_connector *connector, bool force)
|
|
{
|
|
struct intel_dp *intel_dp = intel_attached_dp(connector);
|
|
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
|
|
struct intel_encoder *intel_encoder = &intel_dig_port->base;
|
|
struct drm_device *dev = connector->dev;
|
|
enum drm_connector_status status;
|
|
enum intel_display_power_domain power_domain;
|
|
bool ret;
|
|
|
|
DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
|
|
connector->base.id, connector->name);
|
|
intel_dp_unset_edid(intel_dp);
|
|
|
|
if (intel_dp->is_mst) {
|
|
/* MST devices are disconnected from a monitor POV */
|
|
if (intel_encoder->type != INTEL_OUTPUT_EDP)
|
|
intel_encoder->type = INTEL_OUTPUT_DISPLAYPORT;
|
|
return connector_status_disconnected;
|
|
}
|
|
|
|
power_domain = intel_dp_power_get(intel_dp);
|
|
|
|
/* Can't disconnect eDP, but you can close the lid... */
|
|
if (is_edp(intel_dp))
|
|
status = edp_detect(intel_dp);
|
|
else if (HAS_PCH_SPLIT(dev))
|
|
status = ironlake_dp_detect(intel_dp);
|
|
else
|
|
status = g4x_dp_detect(intel_dp);
|
|
if (status != connector_status_connected)
|
|
goto out;
|
|
|
|
intel_dp_probe_oui(intel_dp);
|
|
|
|
ret = intel_dp_probe_mst(intel_dp);
|
|
if (ret) {
|
|
/* if we are in MST mode then this connector
|
|
won't appear connected or have anything with EDID on it */
|
|
if (intel_encoder->type != INTEL_OUTPUT_EDP)
|
|
intel_encoder->type = INTEL_OUTPUT_DISPLAYPORT;
|
|
status = connector_status_disconnected;
|
|
goto out;
|
|
}
|
|
|
|
intel_dp_set_edid(intel_dp);
|
|
|
|
if (intel_encoder->type != INTEL_OUTPUT_EDP)
|
|
intel_encoder->type = INTEL_OUTPUT_DISPLAYPORT;
|
|
status = connector_status_connected;
|
|
|
|
out:
|
|
intel_dp_power_put(intel_dp, power_domain);
|
|
return status;
|
|
}
|
|
|
|
static void
|
|
intel_dp_force(struct drm_connector *connector)
|
|
{
|
|
struct intel_dp *intel_dp = intel_attached_dp(connector);
|
|
struct intel_encoder *intel_encoder = &dp_to_dig_port(intel_dp)->base;
|
|
enum intel_display_power_domain power_domain;
|
|
|
|
DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
|
|
connector->base.id, connector->name);
|
|
intel_dp_unset_edid(intel_dp);
|
|
|
|
if (connector->status != connector_status_connected)
|
|
return;
|
|
|
|
power_domain = intel_dp_power_get(intel_dp);
|
|
|
|
intel_dp_set_edid(intel_dp);
|
|
|
|
intel_dp_power_put(intel_dp, power_domain);
|
|
|
|
if (intel_encoder->type != INTEL_OUTPUT_EDP)
|
|
intel_encoder->type = INTEL_OUTPUT_DISPLAYPORT;
|
|
}
|
|
|
|
static int intel_dp_get_modes(struct drm_connector *connector)
|
|
{
|
|
struct intel_connector *intel_connector = to_intel_connector(connector);
|
|
struct edid *edid;
|
|
|
|
edid = intel_connector->detect_edid;
|
|
if (edid) {
|
|
int ret = intel_connector_update_modes(connector, edid);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
/* if eDP has no EDID, fall back to fixed mode */
|
|
if (is_edp(intel_attached_dp(connector)) &&
|
|
intel_connector->panel.fixed_mode) {
|
|
struct drm_display_mode *mode;
|
|
|
|
mode = drm_mode_duplicate(connector->dev,
|
|
intel_connector->panel.fixed_mode);
|
|
if (mode) {
|
|
drm_mode_probed_add(connector, mode);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool
|
|
intel_dp_detect_audio(struct drm_connector *connector)
|
|
{
|
|
bool has_audio = false;
|
|
struct edid *edid;
|
|
|
|
edid = to_intel_connector(connector)->detect_edid;
|
|
if (edid)
|
|
has_audio = drm_detect_monitor_audio(edid);
|
|
|
|
return has_audio;
|
|
}
|
|
|
|
static int
|
|
intel_dp_set_property(struct drm_connector *connector,
|
|
struct drm_property *property,
|
|
uint64_t val)
|
|
{
|
|
struct drm_i915_private *dev_priv = connector->dev->dev_private;
|
|
struct intel_connector *intel_connector = to_intel_connector(connector);
|
|
struct intel_encoder *intel_encoder = intel_attached_encoder(connector);
|
|
struct intel_dp *intel_dp = enc_to_intel_dp(&intel_encoder->base);
|
|
int ret;
|
|
|
|
ret = drm_object_property_set_value(&connector->base, property, val);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (property == dev_priv->force_audio_property) {
|
|
int i = val;
|
|
bool has_audio;
|
|
|
|
if (i == intel_dp->force_audio)
|
|
return 0;
|
|
|
|
intel_dp->force_audio = i;
|
|
|
|
if (i == HDMI_AUDIO_AUTO)
|
|
has_audio = intel_dp_detect_audio(connector);
|
|
else
|
|
has_audio = (i == HDMI_AUDIO_ON);
|
|
|
|
if (has_audio == intel_dp->has_audio)
|
|
return 0;
|
|
|
|
intel_dp->has_audio = has_audio;
|
|
goto done;
|
|
}
|
|
|
|
if (property == dev_priv->broadcast_rgb_property) {
|
|
bool old_auto = intel_dp->color_range_auto;
|
|
uint32_t old_range = intel_dp->color_range;
|
|
|
|
switch (val) {
|
|
case INTEL_BROADCAST_RGB_AUTO:
|
|
intel_dp->color_range_auto = true;
|
|
break;
|
|
case INTEL_BROADCAST_RGB_FULL:
|
|
intel_dp->color_range_auto = false;
|
|
intel_dp->color_range = 0;
|
|
break;
|
|
case INTEL_BROADCAST_RGB_LIMITED:
|
|
intel_dp->color_range_auto = false;
|
|
intel_dp->color_range = DP_COLOR_RANGE_16_235;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (old_auto == intel_dp->color_range_auto &&
|
|
old_range == intel_dp->color_range)
|
|
return 0;
|
|
|
|
goto done;
|
|
}
|
|
|
|
if (is_edp(intel_dp) &&
|
|
property == connector->dev->mode_config.scaling_mode_property) {
|
|
if (val == DRM_MODE_SCALE_NONE) {
|
|
DRM_DEBUG_KMS("no scaling not supported\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (intel_connector->panel.fitting_mode == val) {
|
|
/* the eDP scaling property is not changed */
|
|
return 0;
|
|
}
|
|
intel_connector->panel.fitting_mode = val;
|
|
|
|
goto done;
|
|
}
|
|
|
|
return -EINVAL;
|
|
|
|
done:
|
|
if (intel_encoder->base.crtc)
|
|
intel_crtc_restore_mode(intel_encoder->base.crtc);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
intel_dp_connector_destroy(struct drm_connector *connector)
|
|
{
|
|
struct intel_connector *intel_connector = to_intel_connector(connector);
|
|
|
|
kfree(intel_connector->detect_edid);
|
|
|
|
if (!IS_ERR_OR_NULL(intel_connector->edid))
|
|
kfree(intel_connector->edid);
|
|
|
|
/* Can't call is_edp() since the encoder may have been destroyed
|
|
* already. */
|
|
if (connector->connector_type == DRM_MODE_CONNECTOR_eDP)
|
|
intel_panel_fini(&intel_connector->panel);
|
|
|
|
drm_connector_cleanup(connector);
|
|
kfree(connector);
|
|
}
|
|
|
|
void intel_dp_encoder_destroy(struct drm_encoder *encoder)
|
|
{
|
|
struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
|
|
struct intel_dp *intel_dp = &intel_dig_port->dp;
|
|
|
|
drm_dp_aux_unregister(&intel_dp->aux);
|
|
intel_dp_mst_encoder_cleanup(intel_dig_port);
|
|
if (is_edp(intel_dp)) {
|
|
cancel_delayed_work_sync(&intel_dp->panel_vdd_work);
|
|
/*
|
|
* vdd might still be enabled do to the delayed vdd off.
|
|
* Make sure vdd is actually turned off here.
|
|
*/
|
|
pps_lock(intel_dp);
|
|
edp_panel_vdd_off_sync(intel_dp);
|
|
pps_unlock(intel_dp);
|
|
|
|
if (intel_dp->edp_notifier.notifier_call) {
|
|
unregister_reboot_notifier(&intel_dp->edp_notifier);
|
|
intel_dp->edp_notifier.notifier_call = NULL;
|
|
}
|
|
}
|
|
drm_encoder_cleanup(encoder);
|
|
kfree(intel_dig_port);
|
|
}
|
|
|
|
static void intel_dp_encoder_suspend(struct intel_encoder *intel_encoder)
|
|
{
|
|
struct intel_dp *intel_dp = enc_to_intel_dp(&intel_encoder->base);
|
|
|
|
if (!is_edp(intel_dp))
|
|
return;
|
|
|
|
/*
|
|
* vdd might still be enabled do to the delayed vdd off.
|
|
* Make sure vdd is actually turned off here.
|
|
*/
|
|
cancel_delayed_work_sync(&intel_dp->panel_vdd_work);
|
|
pps_lock(intel_dp);
|
|
edp_panel_vdd_off_sync(intel_dp);
|
|
pps_unlock(intel_dp);
|
|
}
|
|
|
|
static void intel_edp_panel_vdd_sanitize(struct intel_dp *intel_dp)
|
|
{
|
|
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
|
|
struct drm_device *dev = intel_dig_port->base.base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
enum intel_display_power_domain power_domain;
|
|
|
|
lockdep_assert_held(&dev_priv->pps_mutex);
|
|
|
|
if (!edp_have_panel_vdd(intel_dp))
|
|
return;
|
|
|
|
/*
|
|
* The VDD bit needs a power domain reference, so if the bit is
|
|
* already enabled when we boot or resume, grab this reference and
|
|
* schedule a vdd off, so we don't hold on to the reference
|
|
* indefinitely.
|
|
*/
|
|
DRM_DEBUG_KMS("VDD left on by BIOS, adjusting state tracking\n");
|
|
power_domain = intel_display_port_power_domain(&intel_dig_port->base);
|
|
intel_display_power_get(dev_priv, power_domain);
|
|
|
|
edp_panel_vdd_schedule_off(intel_dp);
|
|
}
|
|
|
|
static void intel_dp_encoder_reset(struct drm_encoder *encoder)
|
|
{
|
|
struct intel_dp *intel_dp;
|
|
|
|
if (to_intel_encoder(encoder)->type != INTEL_OUTPUT_EDP)
|
|
return;
|
|
|
|
intel_dp = enc_to_intel_dp(encoder);
|
|
|
|
pps_lock(intel_dp);
|
|
|
|
/*
|
|
* Read out the current power sequencer assignment,
|
|
* in case the BIOS did something with it.
|
|
*/
|
|
if (IS_VALLEYVIEW(encoder->dev))
|
|
vlv_initial_power_sequencer_setup(intel_dp);
|
|
|
|
intel_edp_panel_vdd_sanitize(intel_dp);
|
|
|
|
pps_unlock(intel_dp);
|
|
}
|
|
|
|
static const struct drm_connector_funcs intel_dp_connector_funcs = {
|
|
.dpms = intel_connector_dpms,
|
|
.detect = intel_dp_detect,
|
|
.force = intel_dp_force,
|
|
.fill_modes = drm_helper_probe_single_connector_modes,
|
|
.set_property = intel_dp_set_property,
|
|
.atomic_get_property = intel_connector_atomic_get_property,
|
|
.destroy = intel_dp_connector_destroy,
|
|
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
|
|
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
|
|
};
|
|
|
|
static const struct drm_connector_helper_funcs intel_dp_connector_helper_funcs = {
|
|
.get_modes = intel_dp_get_modes,
|
|
.mode_valid = intel_dp_mode_valid,
|
|
.best_encoder = intel_best_encoder,
|
|
};
|
|
|
|
static const struct drm_encoder_funcs intel_dp_enc_funcs = {
|
|
.reset = intel_dp_encoder_reset,
|
|
.destroy = intel_dp_encoder_destroy,
|
|
};
|
|
|
|
void
|
|
intel_dp_hot_plug(struct intel_encoder *intel_encoder)
|
|
{
|
|
return;
|
|
}
|
|
|
|
enum irqreturn
|
|
intel_dp_hpd_pulse(struct intel_digital_port *intel_dig_port, bool long_hpd)
|
|
{
|
|
struct intel_dp *intel_dp = &intel_dig_port->dp;
|
|
struct intel_encoder *intel_encoder = &intel_dig_port->base;
|
|
struct drm_device *dev = intel_dig_port->base.base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
enum intel_display_power_domain power_domain;
|
|
enum irqreturn ret = IRQ_NONE;
|
|
|
|
if (intel_dig_port->base.type != INTEL_OUTPUT_EDP)
|
|
intel_dig_port->base.type = INTEL_OUTPUT_DISPLAYPORT;
|
|
|
|
if (long_hpd && intel_dig_port->base.type == INTEL_OUTPUT_EDP) {
|
|
/*
|
|
* vdd off can generate a long pulse on eDP which
|
|
* would require vdd on to handle it, and thus we
|
|
* would end up in an endless cycle of
|
|
* "vdd off -> long hpd -> vdd on -> detect -> vdd off -> ..."
|
|
*/
|
|
DRM_DEBUG_KMS("ignoring long hpd on eDP port %c\n",
|
|
port_name(intel_dig_port->port));
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
DRM_DEBUG_KMS("got hpd irq on port %c - %s\n",
|
|
port_name(intel_dig_port->port),
|
|
long_hpd ? "long" : "short");
|
|
|
|
power_domain = intel_display_port_power_domain(intel_encoder);
|
|
intel_display_power_get(dev_priv, power_domain);
|
|
|
|
if (long_hpd) {
|
|
|
|
if (HAS_PCH_SPLIT(dev)) {
|
|
if (!ibx_digital_port_connected(dev_priv, intel_dig_port))
|
|
goto mst_fail;
|
|
} else {
|
|
if (g4x_digital_port_connected(dev, intel_dig_port) != 1)
|
|
goto mst_fail;
|
|
}
|
|
|
|
if (!intel_dp_get_dpcd(intel_dp)) {
|
|
goto mst_fail;
|
|
}
|
|
|
|
intel_dp_probe_oui(intel_dp);
|
|
|
|
if (!intel_dp_probe_mst(intel_dp))
|
|
goto mst_fail;
|
|
|
|
} else {
|
|
if (intel_dp->is_mst) {
|
|
if (intel_dp_check_mst_status(intel_dp) == -EINVAL)
|
|
goto mst_fail;
|
|
}
|
|
|
|
if (!intel_dp->is_mst) {
|
|
/*
|
|
* we'll check the link status via the normal hot plug path later -
|
|
* but for short hpds we should check it now
|
|
*/
|
|
drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
|
|
intel_dp_check_link_status(intel_dp);
|
|
drm_modeset_unlock(&dev->mode_config.connection_mutex);
|
|
}
|
|
}
|
|
|
|
ret = IRQ_HANDLED;
|
|
|
|
goto put_power;
|
|
mst_fail:
|
|
/* if we were in MST mode, and device is not there get out of MST mode */
|
|
if (intel_dp->is_mst) {
|
|
DRM_DEBUG_KMS("MST device may have disappeared %d vs %d\n", intel_dp->is_mst, intel_dp->mst_mgr.mst_state);
|
|
intel_dp->is_mst = false;
|
|
drm_dp_mst_topology_mgr_set_mst(&intel_dp->mst_mgr, intel_dp->is_mst);
|
|
}
|
|
put_power:
|
|
intel_display_power_put(dev_priv, power_domain);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Return which DP Port should be selected for Transcoder DP control */
|
|
int
|
|
intel_trans_dp_port_sel(struct drm_crtc *crtc)
|
|
{
|
|
struct drm_device *dev = crtc->dev;
|
|
struct intel_encoder *intel_encoder;
|
|
struct intel_dp *intel_dp;
|
|
|
|
for_each_encoder_on_crtc(dev, crtc, intel_encoder) {
|
|
intel_dp = enc_to_intel_dp(&intel_encoder->base);
|
|
|
|
if (intel_encoder->type == INTEL_OUTPUT_DISPLAYPORT ||
|
|
intel_encoder->type == INTEL_OUTPUT_EDP)
|
|
return intel_dp->output_reg;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
/* check the VBT to see whether the eDP is on DP-D port */
|
|
bool intel_dp_is_edp(struct drm_device *dev, enum port port)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
union child_device_config *p_child;
|
|
int i;
|
|
static const short port_mapping[] = {
|
|
[PORT_B] = PORT_IDPB,
|
|
[PORT_C] = PORT_IDPC,
|
|
[PORT_D] = PORT_IDPD,
|
|
};
|
|
|
|
if (port == PORT_A)
|
|
return true;
|
|
|
|
if (!dev_priv->vbt.child_dev_num)
|
|
return false;
|
|
|
|
for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
|
|
p_child = dev_priv->vbt.child_dev + i;
|
|
|
|
if (p_child->common.dvo_port == port_mapping[port] &&
|
|
(p_child->common.device_type & DEVICE_TYPE_eDP_BITS) ==
|
|
(DEVICE_TYPE_eDP & DEVICE_TYPE_eDP_BITS))
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void
|
|
intel_dp_add_properties(struct intel_dp *intel_dp, struct drm_connector *connector)
|
|
{
|
|
struct intel_connector *intel_connector = to_intel_connector(connector);
|
|
|
|
intel_attach_force_audio_property(connector);
|
|
intel_attach_broadcast_rgb_property(connector);
|
|
intel_dp->color_range_auto = true;
|
|
|
|
if (is_edp(intel_dp)) {
|
|
drm_mode_create_scaling_mode_property(connector->dev);
|
|
drm_object_attach_property(
|
|
&connector->base,
|
|
connector->dev->mode_config.scaling_mode_property,
|
|
DRM_MODE_SCALE_ASPECT);
|
|
intel_connector->panel.fitting_mode = DRM_MODE_SCALE_ASPECT;
|
|
}
|
|
}
|
|
|
|
static void intel_dp_init_panel_power_timestamps(struct intel_dp *intel_dp)
|
|
{
|
|
intel_dp->last_power_cycle = jiffies;
|
|
intel_dp->last_power_on = jiffies;
|
|
intel_dp->last_backlight_off = jiffies;
|
|
}
|
|
|
|
static void
|
|
intel_dp_init_panel_power_sequencer(struct drm_device *dev,
|
|
struct intel_dp *intel_dp)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct edp_power_seq cur, vbt, spec,
|
|
*final = &intel_dp->pps_delays;
|
|
u32 pp_on, pp_off, pp_div, pp;
|
|
int pp_ctrl_reg, pp_on_reg, pp_off_reg, pp_div_reg;
|
|
|
|
lockdep_assert_held(&dev_priv->pps_mutex);
|
|
|
|
/* already initialized? */
|
|
if (final->t11_t12 != 0)
|
|
return;
|
|
|
|
if (HAS_PCH_SPLIT(dev)) {
|
|
pp_ctrl_reg = PCH_PP_CONTROL;
|
|
pp_on_reg = PCH_PP_ON_DELAYS;
|
|
pp_off_reg = PCH_PP_OFF_DELAYS;
|
|
pp_div_reg = PCH_PP_DIVISOR;
|
|
} else {
|
|
enum pipe pipe = vlv_power_sequencer_pipe(intel_dp);
|
|
|
|
pp_ctrl_reg = VLV_PIPE_PP_CONTROL(pipe);
|
|
pp_on_reg = VLV_PIPE_PP_ON_DELAYS(pipe);
|
|
pp_off_reg = VLV_PIPE_PP_OFF_DELAYS(pipe);
|
|
pp_div_reg = VLV_PIPE_PP_DIVISOR(pipe);
|
|
}
|
|
|
|
/* Workaround: Need to write PP_CONTROL with the unlock key as
|
|
* the very first thing. */
|
|
pp = ironlake_get_pp_control(intel_dp);
|
|
I915_WRITE(pp_ctrl_reg, pp);
|
|
|
|
pp_on = I915_READ(pp_on_reg);
|
|
pp_off = I915_READ(pp_off_reg);
|
|
pp_div = I915_READ(pp_div_reg);
|
|
|
|
/* Pull timing values out of registers */
|
|
cur.t1_t3 = (pp_on & PANEL_POWER_UP_DELAY_MASK) >>
|
|
PANEL_POWER_UP_DELAY_SHIFT;
|
|
|
|
cur.t8 = (pp_on & PANEL_LIGHT_ON_DELAY_MASK) >>
|
|
PANEL_LIGHT_ON_DELAY_SHIFT;
|
|
|
|
cur.t9 = (pp_off & PANEL_LIGHT_OFF_DELAY_MASK) >>
|
|
PANEL_LIGHT_OFF_DELAY_SHIFT;
|
|
|
|
cur.t10 = (pp_off & PANEL_POWER_DOWN_DELAY_MASK) >>
|
|
PANEL_POWER_DOWN_DELAY_SHIFT;
|
|
|
|
cur.t11_t12 = ((pp_div & PANEL_POWER_CYCLE_DELAY_MASK) >>
|
|
PANEL_POWER_CYCLE_DELAY_SHIFT) * 1000;
|
|
|
|
DRM_DEBUG_KMS("cur t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n",
|
|
cur.t1_t3, cur.t8, cur.t9, cur.t10, cur.t11_t12);
|
|
|
|
vbt = dev_priv->vbt.edp_pps;
|
|
|
|
/* Upper limits from eDP 1.3 spec. Note that we use the clunky units of
|
|
* our hw here, which are all in 100usec. */
|
|
spec.t1_t3 = 210 * 10;
|
|
spec.t8 = 50 * 10; /* no limit for t8, use t7 instead */
|
|
spec.t9 = 50 * 10; /* no limit for t9, make it symmetric with t8 */
|
|
spec.t10 = 500 * 10;
|
|
/* This one is special and actually in units of 100ms, but zero
|
|
* based in the hw (so we need to add 100 ms). But the sw vbt
|
|
* table multiplies it with 1000 to make it in units of 100usec,
|
|
* too. */
|
|
spec.t11_t12 = (510 + 100) * 10;
|
|
|
|
DRM_DEBUG_KMS("vbt t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n",
|
|
vbt.t1_t3, vbt.t8, vbt.t9, vbt.t10, vbt.t11_t12);
|
|
|
|
/* Use the max of the register settings and vbt. If both are
|
|
* unset, fall back to the spec limits. */
|
|
#define assign_final(field) final->field = (max(cur.field, vbt.field) == 0 ? \
|
|
spec.field : \
|
|
max(cur.field, vbt.field))
|
|
assign_final(t1_t3);
|
|
assign_final(t8);
|
|
assign_final(t9);
|
|
assign_final(t10);
|
|
assign_final(t11_t12);
|
|
#undef assign_final
|
|
|
|
#define get_delay(field) (DIV_ROUND_UP(final->field, 10))
|
|
intel_dp->panel_power_up_delay = get_delay(t1_t3);
|
|
intel_dp->backlight_on_delay = get_delay(t8);
|
|
intel_dp->backlight_off_delay = get_delay(t9);
|
|
intel_dp->panel_power_down_delay = get_delay(t10);
|
|
intel_dp->panel_power_cycle_delay = get_delay(t11_t12);
|
|
#undef get_delay
|
|
|
|
DRM_DEBUG_KMS("panel power up delay %d, power down delay %d, power cycle delay %d\n",
|
|
intel_dp->panel_power_up_delay, intel_dp->panel_power_down_delay,
|
|
intel_dp->panel_power_cycle_delay);
|
|
|
|
DRM_DEBUG_KMS("backlight on delay %d, off delay %d\n",
|
|
intel_dp->backlight_on_delay, intel_dp->backlight_off_delay);
|
|
}
|
|
|
|
static void
|
|
intel_dp_init_panel_power_sequencer_registers(struct drm_device *dev,
|
|
struct intel_dp *intel_dp)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
u32 pp_on, pp_off, pp_div, port_sel = 0;
|
|
int div = HAS_PCH_SPLIT(dev) ? intel_pch_rawclk(dev) : intel_hrawclk(dev);
|
|
int pp_on_reg, pp_off_reg, pp_div_reg;
|
|
enum port port = dp_to_dig_port(intel_dp)->port;
|
|
const struct edp_power_seq *seq = &intel_dp->pps_delays;
|
|
|
|
lockdep_assert_held(&dev_priv->pps_mutex);
|
|
|
|
if (HAS_PCH_SPLIT(dev)) {
|
|
pp_on_reg = PCH_PP_ON_DELAYS;
|
|
pp_off_reg = PCH_PP_OFF_DELAYS;
|
|
pp_div_reg = PCH_PP_DIVISOR;
|
|
} else {
|
|
enum pipe pipe = vlv_power_sequencer_pipe(intel_dp);
|
|
|
|
pp_on_reg = VLV_PIPE_PP_ON_DELAYS(pipe);
|
|
pp_off_reg = VLV_PIPE_PP_OFF_DELAYS(pipe);
|
|
pp_div_reg = VLV_PIPE_PP_DIVISOR(pipe);
|
|
}
|
|
|
|
/*
|
|
* And finally store the new values in the power sequencer. The
|
|
* backlight delays are set to 1 because we do manual waits on them. For
|
|
* T8, even BSpec recommends doing it. For T9, if we don't do this,
|
|
* we'll end up waiting for the backlight off delay twice: once when we
|
|
* do the manual sleep, and once when we disable the panel and wait for
|
|
* the PP_STATUS bit to become zero.
|
|
*/
|
|
pp_on = (seq->t1_t3 << PANEL_POWER_UP_DELAY_SHIFT) |
|
|
(1 << PANEL_LIGHT_ON_DELAY_SHIFT);
|
|
pp_off = (1 << PANEL_LIGHT_OFF_DELAY_SHIFT) |
|
|
(seq->t10 << PANEL_POWER_DOWN_DELAY_SHIFT);
|
|
/* Compute the divisor for the pp clock, simply match the Bspec
|
|
* formula. */
|
|
pp_div = ((100 * div)/2 - 1) << PP_REFERENCE_DIVIDER_SHIFT;
|
|
pp_div |= (DIV_ROUND_UP(seq->t11_t12, 1000)
|
|
<< PANEL_POWER_CYCLE_DELAY_SHIFT);
|
|
|
|
/* Haswell doesn't have any port selection bits for the panel
|
|
* power sequencer any more. */
|
|
if (IS_VALLEYVIEW(dev)) {
|
|
port_sel = PANEL_PORT_SELECT_VLV(port);
|
|
} else if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev)) {
|
|
if (port == PORT_A)
|
|
port_sel = PANEL_PORT_SELECT_DPA;
|
|
else
|
|
port_sel = PANEL_PORT_SELECT_DPD;
|
|
}
|
|
|
|
pp_on |= port_sel;
|
|
|
|
I915_WRITE(pp_on_reg, pp_on);
|
|
I915_WRITE(pp_off_reg, pp_off);
|
|
I915_WRITE(pp_div_reg, pp_div);
|
|
|
|
DRM_DEBUG_KMS("panel power sequencer register settings: PP_ON %#x, PP_OFF %#x, PP_DIV %#x\n",
|
|
I915_READ(pp_on_reg),
|
|
I915_READ(pp_off_reg),
|
|
I915_READ(pp_div_reg));
|
|
}
|
|
|
|
/**
|
|
* intel_dp_set_drrs_state - program registers for RR switch to take effect
|
|
* @dev: DRM device
|
|
* @refresh_rate: RR to be programmed
|
|
*
|
|
* This function gets called when refresh rate (RR) has to be changed from
|
|
* one frequency to another. Switches can be between high and low RR
|
|
* supported by the panel or to any other RR based on media playback (in
|
|
* this case, RR value needs to be passed from user space).
|
|
*
|
|
* The caller of this function needs to take a lock on dev_priv->drrs.
|
|
*/
|
|
static void intel_dp_set_drrs_state(struct drm_device *dev, int refresh_rate)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_encoder *encoder;
|
|
struct intel_digital_port *dig_port = NULL;
|
|
struct intel_dp *intel_dp = dev_priv->drrs.dp;
|
|
struct intel_crtc_state *config = NULL;
|
|
struct intel_crtc *intel_crtc = NULL;
|
|
u32 reg, val;
|
|
enum drrs_refresh_rate_type index = DRRS_HIGH_RR;
|
|
|
|
if (refresh_rate <= 0) {
|
|
DRM_DEBUG_KMS("Refresh rate should be positive non-zero.\n");
|
|
return;
|
|
}
|
|
|
|
if (intel_dp == NULL) {
|
|
DRM_DEBUG_KMS("DRRS not supported.\n");
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* FIXME: This needs proper synchronization with psr state for some
|
|
* platforms that cannot have PSR and DRRS enabled at the same time.
|
|
*/
|
|
|
|
dig_port = dp_to_dig_port(intel_dp);
|
|
encoder = &dig_port->base;
|
|
intel_crtc = to_intel_crtc(encoder->base.crtc);
|
|
|
|
if (!intel_crtc) {
|
|
DRM_DEBUG_KMS("DRRS: intel_crtc not initialized\n");
|
|
return;
|
|
}
|
|
|
|
config = intel_crtc->config;
|
|
|
|
if (dev_priv->drrs.type < SEAMLESS_DRRS_SUPPORT) {
|
|
DRM_DEBUG_KMS("Only Seamless DRRS supported.\n");
|
|
return;
|
|
}
|
|
|
|
if (intel_dp->attached_connector->panel.downclock_mode->vrefresh ==
|
|
refresh_rate)
|
|
index = DRRS_LOW_RR;
|
|
|
|
if (index == dev_priv->drrs.refresh_rate_type) {
|
|
DRM_DEBUG_KMS(
|
|
"DRRS requested for previously set RR...ignoring\n");
|
|
return;
|
|
}
|
|
|
|
if (!intel_crtc->active) {
|
|
DRM_DEBUG_KMS("eDP encoder disabled. CRTC not Active\n");
|
|
return;
|
|
}
|
|
|
|
if (INTEL_INFO(dev)->gen >= 8 && !IS_CHERRYVIEW(dev)) {
|
|
switch (index) {
|
|
case DRRS_HIGH_RR:
|
|
intel_dp_set_m_n(intel_crtc, M1_N1);
|
|
break;
|
|
case DRRS_LOW_RR:
|
|
intel_dp_set_m_n(intel_crtc, M2_N2);
|
|
break;
|
|
case DRRS_MAX_RR:
|
|
default:
|
|
DRM_ERROR("Unsupported refreshrate type\n");
|
|
}
|
|
} else if (INTEL_INFO(dev)->gen > 6) {
|
|
reg = PIPECONF(intel_crtc->config->cpu_transcoder);
|
|
val = I915_READ(reg);
|
|
|
|
if (index > DRRS_HIGH_RR) {
|
|
if (IS_VALLEYVIEW(dev))
|
|
val |= PIPECONF_EDP_RR_MODE_SWITCH_VLV;
|
|
else
|
|
val |= PIPECONF_EDP_RR_MODE_SWITCH;
|
|
} else {
|
|
if (IS_VALLEYVIEW(dev))
|
|
val &= ~PIPECONF_EDP_RR_MODE_SWITCH_VLV;
|
|
else
|
|
val &= ~PIPECONF_EDP_RR_MODE_SWITCH;
|
|
}
|
|
I915_WRITE(reg, val);
|
|
}
|
|
|
|
dev_priv->drrs.refresh_rate_type = index;
|
|
|
|
DRM_DEBUG_KMS("eDP Refresh Rate set to : %dHz\n", refresh_rate);
|
|
}
|
|
|
|
/**
|
|
* intel_edp_drrs_enable - init drrs struct if supported
|
|
* @intel_dp: DP struct
|
|
*
|
|
* Initializes frontbuffer_bits and drrs.dp
|
|
*/
|
|
void intel_edp_drrs_enable(struct intel_dp *intel_dp)
|
|
{
|
|
struct drm_device *dev = intel_dp_to_dev(intel_dp);
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
|
|
struct drm_crtc *crtc = dig_port->base.base.crtc;
|
|
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
|
|
|
|
if (!intel_crtc->config->has_drrs) {
|
|
DRM_DEBUG_KMS("Panel doesn't support DRRS\n");
|
|
return;
|
|
}
|
|
|
|
mutex_lock(&dev_priv->drrs.mutex);
|
|
if (WARN_ON(dev_priv->drrs.dp)) {
|
|
DRM_ERROR("DRRS already enabled\n");
|
|
goto unlock;
|
|
}
|
|
|
|
dev_priv->drrs.busy_frontbuffer_bits = 0;
|
|
|
|
dev_priv->drrs.dp = intel_dp;
|
|
|
|
unlock:
|
|
mutex_unlock(&dev_priv->drrs.mutex);
|
|
}
|
|
|
|
/**
|
|
* intel_edp_drrs_disable - Disable DRRS
|
|
* @intel_dp: DP struct
|
|
*
|
|
*/
|
|
void intel_edp_drrs_disable(struct intel_dp *intel_dp)
|
|
{
|
|
struct drm_device *dev = intel_dp_to_dev(intel_dp);
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
|
|
struct drm_crtc *crtc = dig_port->base.base.crtc;
|
|
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
|
|
|
|
if (!intel_crtc->config->has_drrs)
|
|
return;
|
|
|
|
mutex_lock(&dev_priv->drrs.mutex);
|
|
if (!dev_priv->drrs.dp) {
|
|
mutex_unlock(&dev_priv->drrs.mutex);
|
|
return;
|
|
}
|
|
|
|
if (dev_priv->drrs.refresh_rate_type == DRRS_LOW_RR)
|
|
intel_dp_set_drrs_state(dev_priv->dev,
|
|
intel_dp->attached_connector->panel.
|
|
fixed_mode->vrefresh);
|
|
|
|
dev_priv->drrs.dp = NULL;
|
|
mutex_unlock(&dev_priv->drrs.mutex);
|
|
|
|
cancel_delayed_work_sync(&dev_priv->drrs.work);
|
|
}
|
|
|
|
static void intel_edp_drrs_downclock_work(struct work_struct *work)
|
|
{
|
|
struct drm_i915_private *dev_priv =
|
|
container_of(work, typeof(*dev_priv), drrs.work.work);
|
|
struct intel_dp *intel_dp;
|
|
|
|
mutex_lock(&dev_priv->drrs.mutex);
|
|
|
|
intel_dp = dev_priv->drrs.dp;
|
|
|
|
if (!intel_dp)
|
|
goto unlock;
|
|
|
|
/*
|
|
* The delayed work can race with an invalidate hence we need to
|
|
* recheck.
|
|
*/
|
|
|
|
if (dev_priv->drrs.busy_frontbuffer_bits)
|
|
goto unlock;
|
|
|
|
if (dev_priv->drrs.refresh_rate_type != DRRS_LOW_RR)
|
|
intel_dp_set_drrs_state(dev_priv->dev,
|
|
intel_dp->attached_connector->panel.
|
|
downclock_mode->vrefresh);
|
|
|
|
unlock:
|
|
mutex_unlock(&dev_priv->drrs.mutex);
|
|
}
|
|
|
|
/**
|
|
* intel_edp_drrs_invalidate - Invalidate DRRS
|
|
* @dev: DRM device
|
|
* @frontbuffer_bits: frontbuffer plane tracking bits
|
|
*
|
|
* When there is a disturbance on screen (due to cursor movement/time
|
|
* update etc), DRRS needs to be invalidated, i.e. need to switch to
|
|
* high RR.
|
|
*
|
|
* Dirty frontbuffers relevant to DRRS are tracked in busy_frontbuffer_bits.
|
|
*/
|
|
void intel_edp_drrs_invalidate(struct drm_device *dev,
|
|
unsigned frontbuffer_bits)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct drm_crtc *crtc;
|
|
enum pipe pipe;
|
|
|
|
if (dev_priv->drrs.type == DRRS_NOT_SUPPORTED)
|
|
return;
|
|
|
|
cancel_delayed_work(&dev_priv->drrs.work);
|
|
|
|
mutex_lock(&dev_priv->drrs.mutex);
|
|
if (!dev_priv->drrs.dp) {
|
|
mutex_unlock(&dev_priv->drrs.mutex);
|
|
return;
|
|
}
|
|
|
|
crtc = dp_to_dig_port(dev_priv->drrs.dp)->base.base.crtc;
|
|
pipe = to_intel_crtc(crtc)->pipe;
|
|
|
|
if (dev_priv->drrs.refresh_rate_type == DRRS_LOW_RR) {
|
|
intel_dp_set_drrs_state(dev_priv->dev,
|
|
dev_priv->drrs.dp->attached_connector->panel.
|
|
fixed_mode->vrefresh);
|
|
}
|
|
|
|
frontbuffer_bits &= INTEL_FRONTBUFFER_ALL_MASK(pipe);
|
|
|
|
dev_priv->drrs.busy_frontbuffer_bits |= frontbuffer_bits;
|
|
mutex_unlock(&dev_priv->drrs.mutex);
|
|
}
|
|
|
|
/**
|
|
* intel_edp_drrs_flush - Flush DRRS
|
|
* @dev: DRM device
|
|
* @frontbuffer_bits: frontbuffer plane tracking bits
|
|
*
|
|
* When there is no movement on screen, DRRS work can be scheduled.
|
|
* This DRRS work is responsible for setting relevant registers after a
|
|
* timeout of 1 second.
|
|
*
|
|
* Dirty frontbuffers relevant to DRRS are tracked in busy_frontbuffer_bits.
|
|
*/
|
|
void intel_edp_drrs_flush(struct drm_device *dev,
|
|
unsigned frontbuffer_bits)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct drm_crtc *crtc;
|
|
enum pipe pipe;
|
|
|
|
if (dev_priv->drrs.type == DRRS_NOT_SUPPORTED)
|
|
return;
|
|
|
|
cancel_delayed_work(&dev_priv->drrs.work);
|
|
|
|
mutex_lock(&dev_priv->drrs.mutex);
|
|
if (!dev_priv->drrs.dp) {
|
|
mutex_unlock(&dev_priv->drrs.mutex);
|
|
return;
|
|
}
|
|
|
|
crtc = dp_to_dig_port(dev_priv->drrs.dp)->base.base.crtc;
|
|
pipe = to_intel_crtc(crtc)->pipe;
|
|
dev_priv->drrs.busy_frontbuffer_bits &= ~frontbuffer_bits;
|
|
|
|
if (dev_priv->drrs.refresh_rate_type != DRRS_LOW_RR &&
|
|
!dev_priv->drrs.busy_frontbuffer_bits)
|
|
schedule_delayed_work(&dev_priv->drrs.work,
|
|
msecs_to_jiffies(1000));
|
|
mutex_unlock(&dev_priv->drrs.mutex);
|
|
}
|
|
|
|
/**
|
|
* DOC: Display Refresh Rate Switching (DRRS)
|
|
*
|
|
* Display Refresh Rate Switching (DRRS) is a power conservation feature
|
|
* which enables swtching between low and high refresh rates,
|
|
* dynamically, based on the usage scenario. This feature is applicable
|
|
* for internal panels.
|
|
*
|
|
* Indication that the panel supports DRRS is given by the panel EDID, which
|
|
* would list multiple refresh rates for one resolution.
|
|
*
|
|
* DRRS is of 2 types - static and seamless.
|
|
* Static DRRS involves changing refresh rate (RR) by doing a full modeset
|
|
* (may appear as a blink on screen) and is used in dock-undock scenario.
|
|
* Seamless DRRS involves changing RR without any visual effect to the user
|
|
* and can be used during normal system usage. This is done by programming
|
|
* certain registers.
|
|
*
|
|
* Support for static/seamless DRRS may be indicated in the VBT based on
|
|
* inputs from the panel spec.
|
|
*
|
|
* DRRS saves power by switching to low RR based on usage scenarios.
|
|
*
|
|
* eDP DRRS:-
|
|
* The implementation is based on frontbuffer tracking implementation.
|
|
* When there is a disturbance on the screen triggered by user activity or a
|
|
* periodic system activity, DRRS is disabled (RR is changed to high RR).
|
|
* When there is no movement on screen, after a timeout of 1 second, a switch
|
|
* to low RR is made.
|
|
* For integration with frontbuffer tracking code,
|
|
* intel_edp_drrs_invalidate() and intel_edp_drrs_flush() are called.
|
|
*
|
|
* DRRS can be further extended to support other internal panels and also
|
|
* the scenario of video playback wherein RR is set based on the rate
|
|
* requested by userspace.
|
|
*/
|
|
|
|
/**
|
|
* intel_dp_drrs_init - Init basic DRRS work and mutex.
|
|
* @intel_connector: eDP connector
|
|
* @fixed_mode: preferred mode of panel
|
|
*
|
|
* This function is called only once at driver load to initialize basic
|
|
* DRRS stuff.
|
|
*
|
|
* Returns:
|
|
* Downclock mode if panel supports it, else return NULL.
|
|
* DRRS support is determined by the presence of downclock mode (apart
|
|
* from VBT setting).
|
|
*/
|
|
static struct drm_display_mode *
|
|
intel_dp_drrs_init(struct intel_connector *intel_connector,
|
|
struct drm_display_mode *fixed_mode)
|
|
{
|
|
struct drm_connector *connector = &intel_connector->base;
|
|
struct drm_device *dev = connector->dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct drm_display_mode *downclock_mode = NULL;
|
|
|
|
INIT_DELAYED_WORK(&dev_priv->drrs.work, intel_edp_drrs_downclock_work);
|
|
mutex_init(&dev_priv->drrs.mutex);
|
|
|
|
if (INTEL_INFO(dev)->gen <= 6) {
|
|
DRM_DEBUG_KMS("DRRS supported for Gen7 and above\n");
|
|
return NULL;
|
|
}
|
|
|
|
if (dev_priv->vbt.drrs_type != SEAMLESS_DRRS_SUPPORT) {
|
|
DRM_DEBUG_KMS("VBT doesn't support DRRS\n");
|
|
return NULL;
|
|
}
|
|
|
|
downclock_mode = intel_find_panel_downclock
|
|
(dev, fixed_mode, connector);
|
|
|
|
if (!downclock_mode) {
|
|
DRM_DEBUG_KMS("Downclock mode is not found. DRRS not supported\n");
|
|
return NULL;
|
|
}
|
|
|
|
dev_priv->drrs.type = dev_priv->vbt.drrs_type;
|
|
|
|
dev_priv->drrs.refresh_rate_type = DRRS_HIGH_RR;
|
|
DRM_DEBUG_KMS("seamless DRRS supported for eDP panel.\n");
|
|
return downclock_mode;
|
|
}
|
|
|
|
static bool intel_edp_init_connector(struct intel_dp *intel_dp,
|
|
struct intel_connector *intel_connector)
|
|
{
|
|
struct drm_connector *connector = &intel_connector->base;
|
|
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
|
|
struct intel_encoder *intel_encoder = &intel_dig_port->base;
|
|
struct drm_device *dev = intel_encoder->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct drm_display_mode *fixed_mode = NULL;
|
|
struct drm_display_mode *downclock_mode = NULL;
|
|
bool has_dpcd;
|
|
struct drm_display_mode *scan;
|
|
struct edid *edid;
|
|
enum pipe pipe = INVALID_PIPE;
|
|
|
|
if (!is_edp(intel_dp))
|
|
return true;
|
|
|
|
pps_lock(intel_dp);
|
|
intel_edp_panel_vdd_sanitize(intel_dp);
|
|
pps_unlock(intel_dp);
|
|
|
|
/* Cache DPCD and EDID for edp. */
|
|
has_dpcd = intel_dp_get_dpcd(intel_dp);
|
|
|
|
if (has_dpcd) {
|
|
if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11)
|
|
dev_priv->no_aux_handshake =
|
|
intel_dp->dpcd[DP_MAX_DOWNSPREAD] &
|
|
DP_NO_AUX_HANDSHAKE_LINK_TRAINING;
|
|
} else {
|
|
/* if this fails, presume the device is a ghost */
|
|
DRM_INFO("failed to retrieve link info, disabling eDP\n");
|
|
return false;
|
|
}
|
|
|
|
/* We now know it's not a ghost, init power sequence regs. */
|
|
pps_lock(intel_dp);
|
|
intel_dp_init_panel_power_sequencer_registers(dev, intel_dp);
|
|
pps_unlock(intel_dp);
|
|
|
|
mutex_lock(&dev->mode_config.mutex);
|
|
edid = drm_get_edid(connector, &intel_dp->aux.ddc);
|
|
if (edid) {
|
|
if (drm_add_edid_modes(connector, edid)) {
|
|
drm_mode_connector_update_edid_property(connector,
|
|
edid);
|
|
drm_edid_to_eld(connector, edid);
|
|
} else {
|
|
kfree(edid);
|
|
edid = ERR_PTR(-EINVAL);
|
|
}
|
|
} else {
|
|
edid = ERR_PTR(-ENOENT);
|
|
}
|
|
intel_connector->edid = edid;
|
|
|
|
/* prefer fixed mode from EDID if available */
|
|
list_for_each_entry(scan, &connector->probed_modes, head) {
|
|
if ((scan->type & DRM_MODE_TYPE_PREFERRED)) {
|
|
fixed_mode = drm_mode_duplicate(dev, scan);
|
|
downclock_mode = intel_dp_drrs_init(
|
|
intel_connector, fixed_mode);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* fallback to VBT if available for eDP */
|
|
if (!fixed_mode && dev_priv->vbt.lfp_lvds_vbt_mode) {
|
|
fixed_mode = drm_mode_duplicate(dev,
|
|
dev_priv->vbt.lfp_lvds_vbt_mode);
|
|
if (fixed_mode)
|
|
fixed_mode->type |= DRM_MODE_TYPE_PREFERRED;
|
|
}
|
|
mutex_unlock(&dev->mode_config.mutex);
|
|
|
|
if (IS_VALLEYVIEW(dev)) {
|
|
intel_dp->edp_notifier.notifier_call = edp_notify_handler;
|
|
register_reboot_notifier(&intel_dp->edp_notifier);
|
|
|
|
/*
|
|
* Figure out the current pipe for the initial backlight setup.
|
|
* If the current pipe isn't valid, try the PPS pipe, and if that
|
|
* fails just assume pipe A.
|
|
*/
|
|
if (IS_CHERRYVIEW(dev))
|
|
pipe = DP_PORT_TO_PIPE_CHV(intel_dp->DP);
|
|
else
|
|
pipe = PORT_TO_PIPE(intel_dp->DP);
|
|
|
|
if (pipe != PIPE_A && pipe != PIPE_B)
|
|
pipe = intel_dp->pps_pipe;
|
|
|
|
if (pipe != PIPE_A && pipe != PIPE_B)
|
|
pipe = PIPE_A;
|
|
|
|
DRM_DEBUG_KMS("using pipe %c for initial backlight setup\n",
|
|
pipe_name(pipe));
|
|
}
|
|
|
|
intel_panel_init(&intel_connector->panel, fixed_mode, downclock_mode);
|
|
intel_connector->panel.backlight_power = intel_edp_backlight_power;
|
|
intel_panel_setup_backlight(connector, pipe);
|
|
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
intel_dp_init_connector(struct intel_digital_port *intel_dig_port,
|
|
struct intel_connector *intel_connector)
|
|
{
|
|
struct drm_connector *connector = &intel_connector->base;
|
|
struct intel_dp *intel_dp = &intel_dig_port->dp;
|
|
struct intel_encoder *intel_encoder = &intel_dig_port->base;
|
|
struct drm_device *dev = intel_encoder->base.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
enum port port = intel_dig_port->port;
|
|
int type;
|
|
|
|
intel_dp->pps_pipe = INVALID_PIPE;
|
|
|
|
/* intel_dp vfuncs */
|
|
if (INTEL_INFO(dev)->gen >= 9)
|
|
intel_dp->get_aux_clock_divider = skl_get_aux_clock_divider;
|
|
else if (IS_VALLEYVIEW(dev))
|
|
intel_dp->get_aux_clock_divider = vlv_get_aux_clock_divider;
|
|
else if (IS_HASWELL(dev) || IS_BROADWELL(dev))
|
|
intel_dp->get_aux_clock_divider = hsw_get_aux_clock_divider;
|
|
else if (HAS_PCH_SPLIT(dev))
|
|
intel_dp->get_aux_clock_divider = ilk_get_aux_clock_divider;
|
|
else
|
|
intel_dp->get_aux_clock_divider = i9xx_get_aux_clock_divider;
|
|
|
|
if (INTEL_INFO(dev)->gen >= 9)
|
|
intel_dp->get_aux_send_ctl = skl_get_aux_send_ctl;
|
|
else
|
|
intel_dp->get_aux_send_ctl = i9xx_get_aux_send_ctl;
|
|
|
|
/* Preserve the current hw state. */
|
|
intel_dp->DP = I915_READ(intel_dp->output_reg);
|
|
intel_dp->attached_connector = intel_connector;
|
|
|
|
if (intel_dp_is_edp(dev, port))
|
|
type = DRM_MODE_CONNECTOR_eDP;
|
|
else
|
|
type = DRM_MODE_CONNECTOR_DisplayPort;
|
|
|
|
/*
|
|
* For eDP we always set the encoder type to INTEL_OUTPUT_EDP, but
|
|
* for DP the encoder type can be set by the caller to
|
|
* INTEL_OUTPUT_UNKNOWN for DDI, so don't rewrite it.
|
|
*/
|
|
if (type == DRM_MODE_CONNECTOR_eDP)
|
|
intel_encoder->type = INTEL_OUTPUT_EDP;
|
|
|
|
/* eDP only on port B and/or C on vlv/chv */
|
|
if (WARN_ON(IS_VALLEYVIEW(dev) && is_edp(intel_dp) &&
|
|
port != PORT_B && port != PORT_C))
|
|
return false;
|
|
|
|
DRM_DEBUG_KMS("Adding %s connector on port %c\n",
|
|
type == DRM_MODE_CONNECTOR_eDP ? "eDP" : "DP",
|
|
port_name(port));
|
|
|
|
drm_connector_init(dev, connector, &intel_dp_connector_funcs, type);
|
|
drm_connector_helper_add(connector, &intel_dp_connector_helper_funcs);
|
|
|
|
connector->interlace_allowed = true;
|
|
connector->doublescan_allowed = 0;
|
|
|
|
INIT_DELAYED_WORK(&intel_dp->panel_vdd_work,
|
|
edp_panel_vdd_work);
|
|
|
|
intel_connector_attach_encoder(intel_connector, intel_encoder);
|
|
drm_connector_register(connector);
|
|
|
|
if (HAS_DDI(dev))
|
|
intel_connector->get_hw_state = intel_ddi_connector_get_hw_state;
|
|
else
|
|
intel_connector->get_hw_state = intel_connector_get_hw_state;
|
|
intel_connector->unregister = intel_dp_connector_unregister;
|
|
|
|
/* Set up the hotplug pin. */
|
|
switch (port) {
|
|
case PORT_A:
|
|
intel_encoder->hpd_pin = HPD_PORT_A;
|
|
break;
|
|
case PORT_B:
|
|
intel_encoder->hpd_pin = HPD_PORT_B;
|
|
break;
|
|
case PORT_C:
|
|
intel_encoder->hpd_pin = HPD_PORT_C;
|
|
break;
|
|
case PORT_D:
|
|
intel_encoder->hpd_pin = HPD_PORT_D;
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
|
|
if (is_edp(intel_dp)) {
|
|
pps_lock(intel_dp);
|
|
intel_dp_init_panel_power_timestamps(intel_dp);
|
|
if (IS_VALLEYVIEW(dev))
|
|
vlv_initial_power_sequencer_setup(intel_dp);
|
|
else
|
|
intel_dp_init_panel_power_sequencer(dev, intel_dp);
|
|
pps_unlock(intel_dp);
|
|
}
|
|
|
|
intel_dp_aux_init(intel_dp, intel_connector);
|
|
|
|
/* init MST on ports that can support it */
|
|
if (IS_HASWELL(dev) || IS_BROADWELL(dev) || INTEL_INFO(dev)->gen >= 9) {
|
|
if (port == PORT_B || port == PORT_C || port == PORT_D) {
|
|
intel_dp_mst_encoder_init(intel_dig_port,
|
|
intel_connector->base.base.id);
|
|
}
|
|
}
|
|
|
|
if (!intel_edp_init_connector(intel_dp, intel_connector)) {
|
|
drm_dp_aux_unregister(&intel_dp->aux);
|
|
if (is_edp(intel_dp)) {
|
|
cancel_delayed_work_sync(&intel_dp->panel_vdd_work);
|
|
/*
|
|
* vdd might still be enabled do to the delayed vdd off.
|
|
* Make sure vdd is actually turned off here.
|
|
*/
|
|
pps_lock(intel_dp);
|
|
edp_panel_vdd_off_sync(intel_dp);
|
|
pps_unlock(intel_dp);
|
|
}
|
|
drm_connector_unregister(connector);
|
|
drm_connector_cleanup(connector);
|
|
return false;
|
|
}
|
|
|
|
intel_dp_add_properties(intel_dp, connector);
|
|
|
|
/* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written
|
|
* 0xd. Failure to do so will result in spurious interrupts being
|
|
* generated on the port when a cable is not attached.
|
|
*/
|
|
if (IS_G4X(dev) && !IS_GM45(dev)) {
|
|
u32 temp = I915_READ(PEG_BAND_GAP_DATA);
|
|
I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void
|
|
intel_dp_init(struct drm_device *dev, int output_reg, enum port port)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_digital_port *intel_dig_port;
|
|
struct intel_encoder *intel_encoder;
|
|
struct drm_encoder *encoder;
|
|
struct intel_connector *intel_connector;
|
|
|
|
intel_dig_port = kzalloc(sizeof(*intel_dig_port), GFP_KERNEL);
|
|
if (!intel_dig_port)
|
|
return;
|
|
|
|
intel_connector = intel_connector_alloc();
|
|
if (!intel_connector) {
|
|
kfree(intel_dig_port);
|
|
return;
|
|
}
|
|
|
|
intel_encoder = &intel_dig_port->base;
|
|
encoder = &intel_encoder->base;
|
|
|
|
drm_encoder_init(dev, &intel_encoder->base, &intel_dp_enc_funcs,
|
|
DRM_MODE_ENCODER_TMDS);
|
|
|
|
intel_encoder->compute_config = intel_dp_compute_config;
|
|
intel_encoder->disable = intel_disable_dp;
|
|
intel_encoder->get_hw_state = intel_dp_get_hw_state;
|
|
intel_encoder->get_config = intel_dp_get_config;
|
|
intel_encoder->suspend = intel_dp_encoder_suspend;
|
|
if (IS_CHERRYVIEW(dev)) {
|
|
intel_encoder->pre_pll_enable = chv_dp_pre_pll_enable;
|
|
intel_encoder->pre_enable = chv_pre_enable_dp;
|
|
intel_encoder->enable = vlv_enable_dp;
|
|
intel_encoder->post_disable = chv_post_disable_dp;
|
|
} else if (IS_VALLEYVIEW(dev)) {
|
|
intel_encoder->pre_pll_enable = vlv_dp_pre_pll_enable;
|
|
intel_encoder->pre_enable = vlv_pre_enable_dp;
|
|
intel_encoder->enable = vlv_enable_dp;
|
|
intel_encoder->post_disable = vlv_post_disable_dp;
|
|
} else {
|
|
intel_encoder->pre_enable = g4x_pre_enable_dp;
|
|
intel_encoder->enable = g4x_enable_dp;
|
|
if (INTEL_INFO(dev)->gen >= 5)
|
|
intel_encoder->post_disable = ilk_post_disable_dp;
|
|
}
|
|
|
|
intel_dig_port->port = port;
|
|
intel_dig_port->dp.output_reg = output_reg;
|
|
|
|
intel_encoder->type = INTEL_OUTPUT_DISPLAYPORT;
|
|
if (IS_CHERRYVIEW(dev)) {
|
|
if (port == PORT_D)
|
|
intel_encoder->crtc_mask = 1 << 2;
|
|
else
|
|
intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
|
|
} else {
|
|
intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
|
|
}
|
|
intel_encoder->cloneable = 0;
|
|
intel_encoder->hot_plug = intel_dp_hot_plug;
|
|
|
|
intel_dig_port->hpd_pulse = intel_dp_hpd_pulse;
|
|
dev_priv->hpd_irq_port[port] = intel_dig_port;
|
|
|
|
if (!intel_dp_init_connector(intel_dig_port, intel_connector)) {
|
|
drm_encoder_cleanup(encoder);
|
|
kfree(intel_dig_port);
|
|
kfree(intel_connector);
|
|
}
|
|
}
|
|
|
|
void intel_dp_mst_suspend(struct drm_device *dev)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
int i;
|
|
|
|
/* disable MST */
|
|
for (i = 0; i < I915_MAX_PORTS; i++) {
|
|
struct intel_digital_port *intel_dig_port = dev_priv->hpd_irq_port[i];
|
|
if (!intel_dig_port)
|
|
continue;
|
|
|
|
if (intel_dig_port->base.type == INTEL_OUTPUT_DISPLAYPORT) {
|
|
if (!intel_dig_port->dp.can_mst)
|
|
continue;
|
|
if (intel_dig_port->dp.is_mst)
|
|
drm_dp_mst_topology_mgr_suspend(&intel_dig_port->dp.mst_mgr);
|
|
}
|
|
}
|
|
}
|
|
|
|
void intel_dp_mst_resume(struct drm_device *dev)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
int i;
|
|
|
|
for (i = 0; i < I915_MAX_PORTS; i++) {
|
|
struct intel_digital_port *intel_dig_port = dev_priv->hpd_irq_port[i];
|
|
if (!intel_dig_port)
|
|
continue;
|
|
if (intel_dig_port->base.type == INTEL_OUTPUT_DISPLAYPORT) {
|
|
int ret;
|
|
|
|
if (!intel_dig_port->dp.can_mst)
|
|
continue;
|
|
|
|
ret = drm_dp_mst_topology_mgr_resume(&intel_dig_port->dp.mst_mgr);
|
|
if (ret != 0) {
|
|
intel_dp_check_mst_status(&intel_dig_port->dp);
|
|
}
|
|
}
|
|
}
|
|
}
|