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drm/i915/dsi: Add DCS control for Panel PWM

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If the source of the backlight PWM is from the
panel then the PWM can be controlled by DCS
command, this patch adds the support to
enable/disbale panel PWM, control backlight level
etc...

v2: Moving the CABC bkl functions to new file.(Jani)

v3: Rebase

v4: Rebase

v5: Use mipi_dsi_dcs_write() instead of mipi_dsi_dcs_write_buffer() (Jani)
    Move DCS macro`s to include/video/mipi_display.h (Jani)

v6: Rename the file to intel_dsi_panel_pwm.c
    Removing the CABC operations

v7 by Jani: renames, rebases, etc.

v8 by Jani: s/INTEL_BACKLIGHT_CABC/INTEL_BACKLIGHT_DSI_DCS/

v9 by Jani: rename init function to intel_dsi_dcs_init_backlight_funcs

Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Yetunde Adebisi <yetundex.adebisi@intel.com>
Signed-off-by: Deepak M <m.deepak@intel.com>
Reviewed-by: Yetunde Adebisi <yetundex.adebisi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/71238a4b14b8c3a6c04070c789f09f1b4bc00a15.1461676337.git.jani.nikula@intel.com
This commit is contained in:
Jani Nikula 2016-04-26 16:14:25 +03:00
parent 9a652cc01e
commit 90198355b8
6 changed files with 184 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/gpu/drm/i915/Makefile
View File

@ -87,6 +87,7 @@ i915-y += dvo_ch7017.o \
intel_dp_mst.o \
intel_dp.o \
intel_dsi.o \
intel_dsi_dcs_backlight.o \
intel_dsi_panel_vbt.o \
intel_dsi_pll.o \
intel_dvo.o \

2
drivers/gpu/drm/i915/intel_drv.h
View File

@ -1385,6 +1385,8 @@ void intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port);
/* intel_dsi.c */
void intel_dsi_init(struct drm_device *dev);
/* intel_dsi_dcs_backlight.c */
int intel_dsi_dcs_init_backlight_funcs(struct intel_connector *intel_connector);
/* intel_dvo.c */
void intel_dvo_init(struct drm_device *dev);

19
drivers/gpu/drm/i915/intel_dsi.c
View File

@ -1474,10 +1474,25 @@ void intel_dsi_init(struct drm_device *dev)
else
intel_encoder->crtc_mask = BIT(PIPE_B);
if (dev_priv->vbt.dsi.config->dual_link)
if (dev_priv->vbt.dsi.config->dual_link) {
intel_dsi->ports = BIT(PORT_A) | BIT(PORT_C);
else
switch (dev_priv->vbt.dsi.config->dl_dcs_backlight_ports) {
case DL_DCS_PORT_A:
intel_dsi->dcs_backlight_ports = BIT(PORT_A);
break;
case DL_DCS_PORT_C:
intel_dsi->dcs_backlight_ports = BIT(PORT_C);
break;
default:
case DL_DCS_PORT_A_AND_C:
intel_dsi->dcs_backlight_ports = BIT(PORT_A) | BIT(PORT_C);
break;
}
} else {
intel_dsi->ports = BIT(port);
intel_dsi->dcs_backlight_ports = BIT(port);
}
/* Create a DSI host (and a device) for each port. */
for_each_dsi_port(port, intel_dsi->ports) {

3
drivers/gpu/drm/i915/intel_dsi.h
View File

@ -78,6 +78,9 @@ struct intel_dsi {
u8 escape_clk_div;
u8 dual_link;
u16 dcs_backlight_ports;
u8 pixel_overlap;
u32 port_bits;
u32 bw_timer;

157
drivers/gpu/drm/i915/intel_dsi_dcs_backlight.c Normal file
View File

@ -0,0 +1,157 @@
/*
* Copyright © 2016 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Author: Deepak M <m.deepak at intel.com>
*/
#include "intel_drv.h"
#include "intel_dsi.h"
#include "i915_drv.h"
#include <video/mipi_display.h>
#include <drm/drm_mipi_dsi.h>
#define CONTROL_DISPLAY_BCTRL (1 << 5)
#define CONTROL_DISPLAY_DD (1 << 3)
#define CONTROL_DISPLAY_BL (1 << 2)
#define PANEL_PWM_MAX_VALUE 0xFF
static u32 dcs_get_backlight(struct intel_connector *connector)
{
struct intel_encoder *encoder = connector->encoder;
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
struct mipi_dsi_device *dsi_device;
u8 data;
enum port port;
/* FIXME: Need to take care of 16 bit brightness level */
for_each_dsi_port(port, intel_dsi->dcs_backlight_ports) {
dsi_device = intel_dsi->dsi_hosts[port]->device;
mipi_dsi_dcs_read(dsi_device, MIPI_DCS_GET_DISPLAY_BRIGHTNESS,
&data, sizeof(data));
break;
}
return data;
}
static void dcs_set_backlight(struct intel_connector *connector, u32 level)
{
struct intel_encoder *encoder = connector->encoder;
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
struct mipi_dsi_device *dsi_device;
u8 data = level;
enum port port;
/* FIXME: Need to take care of 16 bit brightness level */
for_each_dsi_port(port, intel_dsi->dcs_backlight_ports) {
dsi_device = intel_dsi->dsi_hosts[port]->device;
mipi_dsi_dcs_write(dsi_device, MIPI_DCS_SET_DISPLAY_BRIGHTNESS,
&data, sizeof(data));
}
}
static void dcs_disable_backlight(struct intel_connector *connector)
{
struct intel_encoder *encoder = connector->encoder;
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
struct mipi_dsi_device *dsi_device;
enum port port;
dcs_set_backlight(connector, 0);
for_each_dsi_port(port, intel_dsi->dcs_backlight_ports) {
u8 ctrl = 0;
dsi_device = intel_dsi->dsi_hosts[port]->device;
mipi_dsi_dcs_read(dsi_device, MIPI_DCS_GET_CONTROL_DISPLAY,
&ctrl, sizeof(ctrl));
ctrl &= ~CONTROL_DISPLAY_BL;
ctrl &= ~CONTROL_DISPLAY_DD;
ctrl &= ~CONTROL_DISPLAY_BCTRL;
mipi_dsi_dcs_write(dsi_device, MIPI_DCS_WRITE_CONTROL_DISPLAY,
&ctrl, sizeof(ctrl));
}
}
static void dcs_enable_backlight(struct intel_connector *connector)
{
struct intel_encoder *encoder = connector->encoder;
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
struct intel_panel *panel = &connector->panel;
struct mipi_dsi_device *dsi_device;
enum port port;
for_each_dsi_port(port, intel_dsi->dcs_backlight_ports) {
u8 ctrl = 0;
dsi_device = intel_dsi->dsi_hosts[port]->device;
mipi_dsi_dcs_read(dsi_device, MIPI_DCS_GET_CONTROL_DISPLAY,
&ctrl, sizeof(ctrl));
ctrl |= CONTROL_DISPLAY_BL;
ctrl |= CONTROL_DISPLAY_DD;
ctrl |= CONTROL_DISPLAY_BCTRL;
mipi_dsi_dcs_write(dsi_device, MIPI_DCS_WRITE_CONTROL_DISPLAY,
&ctrl, sizeof(ctrl));
}
dcs_set_backlight(connector, panel->backlight.level);
}
static int dcs_setup_backlight(struct intel_connector *connector,
enum pipe unused)
{
struct intel_panel *panel = &connector->panel;
panel->backlight.max = PANEL_PWM_MAX_VALUE;
panel->backlight.level = PANEL_PWM_MAX_VALUE;
return 0;
}
int intel_dsi_dcs_init_backlight_funcs(struct intel_connector *intel_connector)
{
struct drm_device *dev = intel_connector->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_encoder *encoder = intel_connector->encoder;
struct intel_panel *panel = &intel_connector->panel;
if (dev_priv->vbt.backlight.type != INTEL_BACKLIGHT_DSI_DCS)
return -ENODEV;
if (WARN_ON(encoder->type != INTEL_OUTPUT_DSI))
return -EINVAL;
panel->backlight.setup = dcs_setup_backlight;
panel->backlight.enable = dcs_enable_backlight;
panel->backlight.disable = dcs_disable_backlight;
panel->backlight.set = dcs_set_backlight;
panel->backlight.get = dcs_get_backlight;
return 0;
}

4
drivers/gpu/drm/i915/intel_panel.c
View File

@ -1722,6 +1722,10 @@ intel_panel_init_backlight_funcs(struct intel_panel *panel)
intel_dp_aux_init_backlight_funcs(connector) == 0)
return;
if (connector->base.connector_type == DRM_MODE_CONNECTOR_DSI &&
intel_dsi_dcs_init_backlight_funcs(connector) == 0)
return;
if (IS_BROXTON(dev_priv)) {
panel->backlight.setup = bxt_setup_backlight;
panel->backlight.enable = bxt_enable_backlight;