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linux_dsm_epyc7002/drivers/gpu/drm/tegra/sor.c
Thierry Reding 180b46ecdc drm/tegra: sor: Reset the SOR if possible 
If the SOR is already up and running when the kernel driver is probed,
setting a mode will typically fail. This can be seen for example on
Jetson TX2. Under certain circumstances the generic power domain code
will cause the SOR to be reset. However, if the power domain is never
powered off (this can happen if the HDA controller is enabled, which
is part of the same power domain as the SOR), then the SOR will end up
not getting reset and fail to properly set a mode.

To work around this, try to get the reset control and assert/deassert
it, irrespective of whether or not a generic power domain is attached
to the SOR. On platforms where the kernel implements generic power
domains (up to Tegra210) this will fail, because the power domain will
already have acquired an exclusive reference to the reset control. But
on recent platforms there the BPMP provides an ABI to control power
domains, it's possible to acquire the reset control from SOR and use
it to put the SOR into a known good state at probe time.

The proper solution for this is to make the SOR driver capable of
dealing with hardware that's already up and running (by first grace-
fully shutting it down, or perhaps by seamlessly transitioning to the
kernel driver and taking over the running display configuration). That
is fairly involved, though, so we'll go with this quickfix for now.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2018-12-06 18:58:32 +01:00

3579 lines
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/*
* Copyright (C) 2013 NVIDIA Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/debugfs.h>
#include <linux/gpio.h>
#include <linux/io.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/regulator/consumer.h>
#include <linux/reset.h>
#include <soc/tegra/pmc.h>
#include <sound/hda_verbs.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_dp_helper.h>
#include <drm/drm_panel.h>
#include <drm/drm_scdc_helper.h>
#include "dc.h"
#include "drm.h"
#include "sor.h"
#include "trace.h"
#define SOR_REKEY 0x38
struct tegra_sor_hdmi_settings {
unsigned long frequency;
u8 vcocap;
u8 filter;
u8 ichpmp;
u8 loadadj;
u8 tmds_termadj;
u8 tx_pu_value;
u8 bg_temp_coef;
u8 bg_vref_level;
u8 avdd10_level;
u8 avdd14_level;
u8 sparepll;
u8 drive_current[4];
u8 preemphasis[4];
};
#if 1
static const struct tegra_sor_hdmi_settings tegra210_sor_hdmi_defaults[] = {
{
.frequency = 54000000,
.vcocap = 0x0,
.filter = 0x0,
.ichpmp = 0x1,
.loadadj = 0x3,
.tmds_termadj = 0x9,
.tx_pu_value = 0x10,
.bg_temp_coef = 0x3,
.bg_vref_level = 0x8,
.avdd10_level = 0x4,
.avdd14_level = 0x4,
.sparepll = 0x0,
.drive_current = { 0x33, 0x3a, 0x3a, 0x3a },
.preemphasis = { 0x00, 0x00, 0x00, 0x00 },
}, {
.frequency = 75000000,
.vcocap = 0x3,
.filter = 0x0,
.ichpmp = 0x1,
.loadadj = 0x3,
.tmds_termadj = 0x9,
.tx_pu_value = 0x40,
.bg_temp_coef = 0x3,
.bg_vref_level = 0x8,
.avdd10_level = 0x4,
.avdd14_level = 0x4,
.sparepll = 0x0,
.drive_current = { 0x33, 0x3a, 0x3a, 0x3a },
.preemphasis = { 0x00, 0x00, 0x00, 0x00 },
}, {
.frequency = 150000000,
.vcocap = 0x3,
.filter = 0x0,
.ichpmp = 0x1,
.loadadj = 0x3,
.tmds_termadj = 0x9,
.tx_pu_value = 0x66,
.bg_temp_coef = 0x3,
.bg_vref_level = 0x8,
.avdd10_level = 0x4,
.avdd14_level = 0x4,
.sparepll = 0x0,
.drive_current = { 0x33, 0x3a, 0x3a, 0x3a },
.preemphasis = { 0x00, 0x00, 0x00, 0x00 },
}, {
.frequency = 300000000,
.vcocap = 0x3,
.filter = 0x0,
.ichpmp = 0x1,
.loadadj = 0x3,
.tmds_termadj = 0x9,
.tx_pu_value = 0x66,
.bg_temp_coef = 0x3,
.bg_vref_level = 0xa,
.avdd10_level = 0x4,
.avdd14_level = 0x4,
.sparepll = 0x0,
.drive_current = { 0x33, 0x3f, 0x3f, 0x3f },
.preemphasis = { 0x00, 0x17, 0x17, 0x17 },
}, {
.frequency = 600000000,
.vcocap = 0x3,
.filter = 0x0,
.ichpmp = 0x1,
.loadadj = 0x3,
.tmds_termadj = 0x9,
.tx_pu_value = 0x66,
.bg_temp_coef = 0x3,
.bg_vref_level = 0x8,
.avdd10_level = 0x4,
.avdd14_level = 0x4,
.sparepll = 0x0,
.drive_current = { 0x33, 0x3f, 0x3f, 0x3f },
.preemphasis = { 0x00, 0x00, 0x00, 0x00 },
},
};
#else
static const struct tegra_sor_hdmi_settings tegra210_sor_hdmi_defaults[] = {
{
.frequency = 75000000,
.vcocap = 0x3,
.filter = 0x0,
.ichpmp = 0x1,
.loadadj = 0x3,
.tmds_termadj = 0x9,
.tx_pu_value = 0x40,
.bg_temp_coef = 0x3,
.bg_vref_level = 0x8,
.avdd10_level = 0x4,
.avdd14_level = 0x4,
.sparepll = 0x0,
.drive_current = { 0x29, 0x29, 0x29, 0x29 },
.preemphasis = { 0x00, 0x00, 0x00, 0x00 },
}, {
.frequency = 150000000,
.vcocap = 0x3,
.filter = 0x0,
.ichpmp = 0x1,
.loadadj = 0x3,
.tmds_termadj = 0x9,
.tx_pu_value = 0x66,
.bg_temp_coef = 0x3,
.bg_vref_level = 0x8,
.avdd10_level = 0x4,
.avdd14_level = 0x4,
.sparepll = 0x0,
.drive_current = { 0x30, 0x37, 0x37, 0x37 },
.preemphasis = { 0x01, 0x02, 0x02, 0x02 },
}, {
.frequency = 300000000,
.vcocap = 0x3,
.filter = 0x0,
.ichpmp = 0x6,
.loadadj = 0x3,
.tmds_termadj = 0x9,
.tx_pu_value = 0x66,
.bg_temp_coef = 0x3,
.bg_vref_level = 0xf,
.avdd10_level = 0x4,
.avdd14_level = 0x4,
.sparepll = 0x0,
.drive_current = { 0x30, 0x37, 0x37, 0x37 },
.preemphasis = { 0x10, 0x3e, 0x3e, 0x3e },
}, {
.frequency = 600000000,
.vcocap = 0x3,
.filter = 0x0,
.ichpmp = 0xa,
.loadadj = 0x3,
.tmds_termadj = 0xb,
.tx_pu_value = 0x66,
.bg_temp_coef = 0x3,
.bg_vref_level = 0xe,
.avdd10_level = 0x4,
.avdd14_level = 0x4,
.sparepll = 0x0,
.drive_current = { 0x35, 0x3e, 0x3e, 0x3e },
.preemphasis = { 0x02, 0x3f, 0x3f, 0x3f },
},
};
#endif
static const struct tegra_sor_hdmi_settings tegra186_sor_hdmi_defaults[] = {
{
.frequency = 54000000,
.vcocap = 0,
.filter = 5,
.ichpmp = 5,
.loadadj = 3,
.tmds_termadj = 0xf,
.tx_pu_value = 0,
.bg_temp_coef = 3,
.bg_vref_level = 8,
.avdd10_level = 4,
.avdd14_level = 4,
.sparepll = 0x54,
.drive_current = { 0x3a, 0x3a, 0x3a, 0x33 },
.preemphasis = { 0x00, 0x00, 0x00, 0x00 },
}, {
.frequency = 75000000,
.vcocap = 1,
.filter = 5,
.ichpmp = 5,
.loadadj = 3,
.tmds_termadj = 0xf,
.tx_pu_value = 0,
.bg_temp_coef = 3,
.bg_vref_level = 8,
.avdd10_level = 4,
.avdd14_level = 4,
.sparepll = 0x44,
.drive_current = { 0x3a, 0x3a, 0x3a, 0x33 },
.preemphasis = { 0x00, 0x00, 0x00, 0x00 },
}, {
.frequency = 150000000,
.vcocap = 3,
.filter = 5,
.ichpmp = 5,
.loadadj = 3,
.tmds_termadj = 15,
.tx_pu_value = 0x66 /* 0 */,
.bg_temp_coef = 3,
.bg_vref_level = 8,
.avdd10_level = 4,
.avdd14_level = 4,
.sparepll = 0x00, /* 0x34 */
.drive_current = { 0x3a, 0x3a, 0x3a, 0x37 },
.preemphasis = { 0x00, 0x00, 0x00, 0x00 },
}, {
.frequency = 300000000,
.vcocap = 3,
.filter = 5,
.ichpmp = 5,
.loadadj = 3,
.tmds_termadj = 15,
.tx_pu_value = 64,
.bg_temp_coef = 3,
.bg_vref_level = 8,
.avdd10_level = 4,
.avdd14_level = 4,
.sparepll = 0x34,
.drive_current = { 0x3d, 0x3d, 0x3d, 0x33 },
.preemphasis = { 0x00, 0x00, 0x00, 0x00 },
}, {
.frequency = 600000000,
.vcocap = 3,
.filter = 5,
.ichpmp = 5,
.loadadj = 3,
.tmds_termadj = 12,
.tx_pu_value = 96,
.bg_temp_coef = 3,
.bg_vref_level = 8,
.avdd10_level = 4,
.avdd14_level = 4,
.sparepll = 0x34,
.drive_current = { 0x3d, 0x3d, 0x3d, 0x33 },
.preemphasis = { 0x00, 0x00, 0x00, 0x00 },
}
};
static const struct tegra_sor_hdmi_settings tegra194_sor_hdmi_defaults[] = {
{
.frequency = 54000000,
.vcocap = 0,
.filter = 5,
.ichpmp = 5,
.loadadj = 3,
.tmds_termadj = 0xf,
.tx_pu_value = 0,
.bg_temp_coef = 3,
.bg_vref_level = 8,
.avdd10_level = 4,
.avdd14_level = 4,
.sparepll = 0x54,
.drive_current = { 0x3a, 0x3a, 0x3a, 0x33 },
.preemphasis = { 0x00, 0x00, 0x00, 0x00 },
}, {
.frequency = 75000000,
.vcocap = 1,
.filter = 5,
.ichpmp = 5,
.loadadj = 3,
.tmds_termadj = 0xf,
.tx_pu_value = 0,
.bg_temp_coef = 3,
.bg_vref_level = 8,
.avdd10_level = 4,
.avdd14_level = 4,
.sparepll = 0x44,
.drive_current = { 0x3a, 0x3a, 0x3a, 0x33 },
.preemphasis = { 0x00, 0x00, 0x00, 0x00 },
}, {
.frequency = 150000000,
.vcocap = 3,
.filter = 5,
.ichpmp = 5,
.loadadj = 3,
.tmds_termadj = 15,
.tx_pu_value = 0x66 /* 0 */,
.bg_temp_coef = 3,
.bg_vref_level = 8,
.avdd10_level = 4,
.avdd14_level = 4,
.sparepll = 0x00, /* 0x34 */
.drive_current = { 0x3a, 0x3a, 0x3a, 0x37 },
.preemphasis = { 0x00, 0x00, 0x00, 0x00 },
}, {
.frequency = 300000000,
.vcocap = 3,
.filter = 5,
.ichpmp = 5,
.loadadj = 3,
.tmds_termadj = 15,
.tx_pu_value = 64,
.bg_temp_coef = 3,
.bg_vref_level = 8,
.avdd10_level = 4,
.avdd14_level = 4,
.sparepll = 0x34,
.drive_current = { 0x3d, 0x3d, 0x3d, 0x33 },
.preemphasis = { 0x00, 0x00, 0x00, 0x00 },
}, {
.frequency = 600000000,
.vcocap = 3,
.filter = 5,
.ichpmp = 5,
.loadadj = 3,
.tmds_termadj = 12,
.tx_pu_value = 96,
.bg_temp_coef = 3,
.bg_vref_level = 8,
.avdd10_level = 4,
.avdd14_level = 4,
.sparepll = 0x34,
.drive_current = { 0x3d, 0x3d, 0x3d, 0x33 },
.preemphasis = { 0x00, 0x00, 0x00, 0x00 },
}
};
struct tegra_sor_regs {
unsigned int head_state0;
unsigned int head_state1;
unsigned int head_state2;
unsigned int head_state3;
unsigned int head_state4;
unsigned int head_state5;
unsigned int pll0;
unsigned int pll1;
unsigned int pll2;
unsigned int pll3;
unsigned int dp_padctl0;
unsigned int dp_padctl2;
};
struct tegra_sor_soc {
bool supports_edp;
bool supports_lvds;
bool supports_hdmi;
bool supports_dp;
const struct tegra_sor_regs *regs;
bool has_nvdisplay;
const struct tegra_sor_hdmi_settings *settings;
unsigned int num_settings;
const u8 *xbar_cfg;
};
struct tegra_sor;
struct tegra_sor_ops {
const char *name;
int (*probe)(struct tegra_sor *sor);
int (*remove)(struct tegra_sor *sor);
};
struct tegra_sor {
struct host1x_client client;
struct tegra_output output;
struct device *dev;
const struct tegra_sor_soc *soc;
void __iomem *regs;
unsigned int index;
unsigned int irq;
struct reset_control *rst;
struct clk *clk_parent;
struct clk *clk_safe;
struct clk *clk_out;
struct clk *clk_pad;
struct clk *clk_dp;
struct clk *clk;
struct drm_dp_aux *aux;
struct drm_info_list *debugfs_files;
const struct tegra_sor_ops *ops;
enum tegra_io_pad pad;
/* for HDMI 2.0 */
struct tegra_sor_hdmi_settings *settings;
unsigned int num_settings;
struct regulator *avdd_io_supply;
struct regulator *vdd_pll_supply;
struct regulator *hdmi_supply;
struct delayed_work scdc;
bool scdc_enabled;
struct {
unsigned int sample_rate;
unsigned int channels;
} audio;
};
struct tegra_sor_state {
struct drm_connector_state base;
unsigned int link_speed;
unsigned long pclk;
unsigned int bpc;
};
static inline struct tegra_sor_state *
to_sor_state(struct drm_connector_state *state)
{
return container_of(state, struct tegra_sor_state, base);
}
struct tegra_sor_config {
u32 bits_per_pixel;
u32 active_polarity;
u32 active_count;
u32 tu_size;
u32 active_frac;
u32 watermark;
u32 hblank_symbols;
u32 vblank_symbols;
};
static inline struct tegra_sor *
host1x_client_to_sor(struct host1x_client *client)
{
return container_of(client, struct tegra_sor, client);
}
static inline struct tegra_sor *to_sor(struct tegra_output *output)
{
return container_of(output, struct tegra_sor, output);
}
static inline u32 tegra_sor_readl(struct tegra_sor *sor, unsigned int offset)
{
u32 value = readl(sor->regs + (offset << 2));
trace_sor_readl(sor->dev, offset, value);
return value;
}
static inline void tegra_sor_writel(struct tegra_sor *sor, u32 value,
unsigned int offset)
{
trace_sor_writel(sor->dev, offset, value);
writel(value, sor->regs + (offset << 2));
}
static int tegra_sor_set_parent_clock(struct tegra_sor *sor, struct clk *parent)
{
int err;
clk_disable_unprepare(sor->clk);
err = clk_set_parent(sor->clk_out, parent);
if (err < 0)
return err;
err = clk_prepare_enable(sor->clk);
if (err < 0)
return err;
return 0;
}
struct tegra_clk_sor_pad {
struct clk_hw hw;
struct tegra_sor *sor;
};
static inline struct tegra_clk_sor_pad *to_pad(struct clk_hw *hw)
{
return container_of(hw, struct tegra_clk_sor_pad, hw);
}
static const char * const tegra_clk_sor_pad_parents[] = {
"pll_d2_out0", "pll_dp"
};
static int tegra_clk_sor_pad_set_parent(struct clk_hw *hw, u8 index)
{
struct tegra_clk_sor_pad *pad = to_pad(hw);
struct tegra_sor *sor = pad->sor;
u32 value;
value = tegra_sor_readl(sor, SOR_CLK_CNTRL);
value &= ~SOR_CLK_CNTRL_DP_CLK_SEL_MASK;
switch (index) {
case 0:
value |= SOR_CLK_CNTRL_DP_CLK_SEL_SINGLE_PCLK;
break;
case 1:
value |= SOR_CLK_CNTRL_DP_CLK_SEL_SINGLE_DPCLK;
break;
}
tegra_sor_writel(sor, value, SOR_CLK_CNTRL);
return 0;
}
static u8 tegra_clk_sor_pad_get_parent(struct clk_hw *hw)
{
struct tegra_clk_sor_pad *pad = to_pad(hw);
struct tegra_sor *sor = pad->sor;
u8 parent = U8_MAX;
u32 value;
value = tegra_sor_readl(sor, SOR_CLK_CNTRL);
switch (value & SOR_CLK_CNTRL_DP_CLK_SEL_MASK) {
case SOR_CLK_CNTRL_DP_CLK_SEL_SINGLE_PCLK:
case SOR_CLK_CNTRL_DP_CLK_SEL_DIFF_PCLK:
parent = 0;
break;
case SOR_CLK_CNTRL_DP_CLK_SEL_SINGLE_DPCLK:
case SOR_CLK_CNTRL_DP_CLK_SEL_DIFF_DPCLK:
parent = 1;
break;
}
return parent;
}
static const struct clk_ops tegra_clk_sor_pad_ops = {
.set_parent = tegra_clk_sor_pad_set_parent,
.get_parent = tegra_clk_sor_pad_get_parent,
};
static struct clk *tegra_clk_sor_pad_register(struct tegra_sor *sor,
const char *name)
{
struct tegra_clk_sor_pad *pad;
struct clk_init_data init;
struct clk *clk;
pad = devm_kzalloc(sor->dev, sizeof(*pad), GFP_KERNEL);
if (!pad)
return ERR_PTR(-ENOMEM);
pad->sor = sor;
init.name = name;
init.flags = 0;
init.parent_names = tegra_clk_sor_pad_parents;
init.num_parents = ARRAY_SIZE(tegra_clk_sor_pad_parents);
init.ops = &tegra_clk_sor_pad_ops;
pad->hw.init = &init;
clk = devm_clk_register(sor->dev, &pad->hw);
return clk;
}
static int tegra_sor_dp_train_fast(struct tegra_sor *sor,
struct drm_dp_link *link)
{
unsigned int i;
u8 pattern;
u32 value;
int err;
/* setup lane parameters */
value = SOR_LANE_DRIVE_CURRENT_LANE3(0x40) |
SOR_LANE_DRIVE_CURRENT_LANE2(0x40) |
SOR_LANE_DRIVE_CURRENT_LANE1(0x40) |
SOR_LANE_DRIVE_CURRENT_LANE0(0x40);
tegra_sor_writel(sor, value, SOR_LANE_DRIVE_CURRENT0);
value = SOR_LANE_PREEMPHASIS_LANE3(0x0f) |
SOR_LANE_PREEMPHASIS_LANE2(0x0f) |
SOR_LANE_PREEMPHASIS_LANE1(0x0f) |
SOR_LANE_PREEMPHASIS_LANE0(0x0f);
tegra_sor_writel(sor, value, SOR_LANE_PREEMPHASIS0);
value = SOR_LANE_POSTCURSOR_LANE3(0x00) |
SOR_LANE_POSTCURSOR_LANE2(0x00) |
SOR_LANE_POSTCURSOR_LANE1(0x00) |
SOR_LANE_POSTCURSOR_LANE0(0x00);
tegra_sor_writel(sor, value, SOR_LANE_POSTCURSOR0);
/* disable LVDS mode */
tegra_sor_writel(sor, 0, SOR_LVDS);
value = tegra_sor_readl(sor, sor->soc->regs->dp_padctl0);
value |= SOR_DP_PADCTL_TX_PU_ENABLE;
value &= ~SOR_DP_PADCTL_TX_PU_MASK;
value |= SOR_DP_PADCTL_TX_PU(2); /* XXX: don't hardcode? */
tegra_sor_writel(sor, value, sor->soc->regs->dp_padctl0);
value = tegra_sor_readl(sor, sor->soc->regs->dp_padctl0);
value |= SOR_DP_PADCTL_CM_TXD_3 | SOR_DP_PADCTL_CM_TXD_2 |
SOR_DP_PADCTL_CM_TXD_1 | SOR_DP_PADCTL_CM_TXD_0;
tegra_sor_writel(sor, value, sor->soc->regs->dp_padctl0);
usleep_range(10, 100);
value = tegra_sor_readl(sor, sor->soc->regs->dp_padctl0);
value &= ~(SOR_DP_PADCTL_CM_TXD_3 | SOR_DP_PADCTL_CM_TXD_2 |
SOR_DP_PADCTL_CM_TXD_1 | SOR_DP_PADCTL_CM_TXD_0);
tegra_sor_writel(sor, value, sor->soc->regs->dp_padctl0);
err = drm_dp_aux_prepare(sor->aux, DP_SET_ANSI_8B10B);
if (err < 0)
return err;
for (i = 0, value = 0; i < link->num_lanes; i++) {
unsigned long lane = SOR_DP_TPG_CHANNEL_CODING |
SOR_DP_TPG_SCRAMBLER_NONE |
SOR_DP_TPG_PATTERN_TRAIN1;
value = (value << 8) | lane;
}
tegra_sor_writel(sor, value, SOR_DP_TPG);
pattern = DP_TRAINING_PATTERN_1;
err = drm_dp_aux_train(sor->aux, link, pattern);
if (err < 0)
return err;
value = tegra_sor_readl(sor, SOR_DP_SPARE0);
value |= SOR_DP_SPARE_SEQ_ENABLE;
value &= ~SOR_DP_SPARE_PANEL_INTERNAL;
value |= SOR_DP_SPARE_MACRO_SOR_CLK;
tegra_sor_writel(sor, value, SOR_DP_SPARE0);
for (i = 0, value = 0; i < link->num_lanes; i++) {
unsigned long lane = SOR_DP_TPG_CHANNEL_CODING |
SOR_DP_TPG_SCRAMBLER_NONE |
SOR_DP_TPG_PATTERN_TRAIN2;
value = (value << 8) | lane;
}
tegra_sor_writel(sor, value, SOR_DP_TPG);
pattern = DP_LINK_SCRAMBLING_DISABLE | DP_TRAINING_PATTERN_2;
err = drm_dp_aux_train(sor->aux, link, pattern);
if (err < 0)
return err;
for (i = 0, value = 0; i < link->num_lanes; i++) {
unsigned long lane = SOR_DP_TPG_CHANNEL_CODING |
SOR_DP_TPG_SCRAMBLER_GALIOS |
SOR_DP_TPG_PATTERN_NONE;
value = (value << 8) | lane;
}
tegra_sor_writel(sor, value, SOR_DP_TPG);
pattern = DP_TRAINING_PATTERN_DISABLE;
err = drm_dp_aux_train(sor->aux, link, pattern);
if (err < 0)
return err;
return 0;
}
static void tegra_sor_super_update(struct tegra_sor *sor)
{
tegra_sor_writel(sor, 0, SOR_SUPER_STATE0);
tegra_sor_writel(sor, 1, SOR_SUPER_STATE0);
tegra_sor_writel(sor, 0, SOR_SUPER_STATE0);
}
static void tegra_sor_update(struct tegra_sor *sor)
{
tegra_sor_writel(sor, 0, SOR_STATE0);
tegra_sor_writel(sor, 1, SOR_STATE0);
tegra_sor_writel(sor, 0, SOR_STATE0);
}
static int tegra_sor_setup_pwm(struct tegra_sor *sor, unsigned long timeout)
{
u32 value;
value = tegra_sor_readl(sor, SOR_PWM_DIV);
value &= ~SOR_PWM_DIV_MASK;
value |= 0x400; /* period */
tegra_sor_writel(sor, value, SOR_PWM_DIV);
value = tegra_sor_readl(sor, SOR_PWM_CTL);
value &= ~SOR_PWM_CTL_DUTY_CYCLE_MASK;
value |= 0x400; /* duty cycle */
value &= ~SOR_PWM_CTL_CLK_SEL; /* clock source: PCLK */
value |= SOR_PWM_CTL_TRIGGER;
tegra_sor_writel(sor, value, SOR_PWM_CTL);
timeout = jiffies + msecs_to_jiffies(timeout);
while (time_before(jiffies, timeout)) {
value = tegra_sor_readl(sor, SOR_PWM_CTL);
if ((value & SOR_PWM_CTL_TRIGGER) == 0)
return 0;
usleep_range(25, 100);
}
return -ETIMEDOUT;
}
static int tegra_sor_attach(struct tegra_sor *sor)
{
unsigned long value, timeout;
/* wake up in normal mode */
value = tegra_sor_readl(sor, SOR_SUPER_STATE1);
value |= SOR_SUPER_STATE_HEAD_MODE_AWAKE;
value |= SOR_SUPER_STATE_MODE_NORMAL;
tegra_sor_writel(sor, value, SOR_SUPER_STATE1);
tegra_sor_super_update(sor);
/* attach */
value = tegra_sor_readl(sor, SOR_SUPER_STATE1);
value |= SOR_SUPER_STATE_ATTACHED;
tegra_sor_writel(sor, value, SOR_SUPER_STATE1);
tegra_sor_super_update(sor);
timeout = jiffies + msecs_to_jiffies(250);
while (time_before(jiffies, timeout)) {
value = tegra_sor_readl(sor, SOR_TEST);
if ((value & SOR_TEST_ATTACHED) != 0)
return 0;
usleep_range(25, 100);
}
return -ETIMEDOUT;
}
static int tegra_sor_wakeup(struct tegra_sor *sor)
{
unsigned long value, timeout;
timeout = jiffies + msecs_to_jiffies(250);
/* wait for head to wake up */
while (time_before(jiffies, timeout)) {
value = tegra_sor_readl(sor, SOR_TEST);
value &= SOR_TEST_HEAD_MODE_MASK;
if (value == SOR_TEST_HEAD_MODE_AWAKE)
return 0;
usleep_range(25, 100);
}
return -ETIMEDOUT;
}
static int tegra_sor_power_up(struct tegra_sor *sor, unsigned long timeout)
{
u32 value;
value = tegra_sor_readl(sor, SOR_PWR);
value |= SOR_PWR_TRIGGER | SOR_PWR_NORMAL_STATE_PU;
tegra_sor_writel(sor, value, SOR_PWR);
timeout = jiffies + msecs_to_jiffies(timeout);
while (time_before(jiffies, timeout)) {
value = tegra_sor_readl(sor, SOR_PWR);
if ((value & SOR_PWR_TRIGGER) == 0)
return 0;
usleep_range(25, 100);
}
return -ETIMEDOUT;
}
struct tegra_sor_params {
/* number of link clocks per line */
unsigned int num_clocks;
/* ratio between input and output */
u64 ratio;
/* precision factor */
u64 precision;
unsigned int active_polarity;
unsigned int active_count;
unsigned int active_frac;
unsigned int tu_size;
unsigned int error;
};
static int tegra_sor_compute_params(struct tegra_sor *sor,
struct tegra_sor_params *params,
unsigned int tu_size)
{
u64 active_sym, active_count, frac, approx;
u32 active_polarity, active_frac = 0;
const u64 f = params->precision;
s64 error;
active_sym = params->ratio * tu_size;
active_count = div_u64(active_sym, f) * f;
frac = active_sym - active_count;
/* fraction < 0.5 */
if (frac >= (f / 2)) {
active_polarity = 1;
frac = f - frac;
} else {
active_polarity = 0;
}
if (frac != 0) {
frac = div_u64(f * f, frac); /* 1/fraction */
if (frac <= (15 * f)) {
active_frac = div_u64(frac, f);
/* round up */
if (active_polarity)
active_frac++;
} else {
active_frac = active_polarity ? 1 : 15;
}
}
if (active_frac == 1)
active_polarity = 0;
if (active_polarity == 1) {
if (active_frac) {
approx = active_count + (active_frac * (f - 1)) * f;
approx = div_u64(approx, active_frac * f);
} else {
approx = active_count + f;
}
} else {
if (active_frac)
approx = active_count + div_u64(f, active_frac);
else
approx = active_count;
}
error = div_s64(active_sym - approx, tu_size);
error *= params->num_clocks;
if (error <= 0 && abs(error) < params->error) {
params->active_count = div_u64(active_count, f);
params->active_polarity = active_polarity;
params->active_frac = active_frac;
params->error = abs(error);
params->tu_size = tu_size;
if (error == 0)
return true;
}
return false;
}
static int tegra_sor_compute_config(struct tegra_sor *sor,
const struct drm_display_mode *mode,
struct tegra_sor_config *config,
struct drm_dp_link *link)
{
const u64 f = 100000, link_rate = link->rate * 1000;
const u64 pclk = mode->clock * 1000;
u64 input, output, watermark, num;
struct tegra_sor_params params;
u32 num_syms_per_line;
unsigned int i;
if (!link_rate || !link->num_lanes || !pclk || !config->bits_per_pixel)
return -EINVAL;
output = link_rate * 8 * link->num_lanes;
input = pclk * config->bits_per_pixel;
if (input >= output)
return -ERANGE;
memset(&params, 0, sizeof(params));
params.ratio = div64_u64(input * f, output);
params.num_clocks = div_u64(link_rate * mode->hdisplay, pclk);
params.precision = f;
params.error = 64 * f;
params.tu_size = 64;
for (i = params.tu_size; i >= 32; i--)
if (tegra_sor_compute_params(sor, &params, i))
break;
if (params.active_frac == 0) {
config->active_polarity = 0;
config->active_count = params.active_count;
if (!params.active_polarity)
config->active_count--;
config->tu_size = params.tu_size;
config->active_frac = 1;
} else {
config->active_polarity = params.active_polarity;
config->active_count = params.active_count;
config->active_frac = params.active_frac;
config->tu_size = params.tu_size;
}
dev_dbg(sor->dev,
"polarity: %d active count: %d tu size: %d active frac: %d\n",
config->active_polarity, config->active_count,
config->tu_size, config->active_frac);
watermark = params.ratio * config->tu_size * (f - params.ratio);
watermark = div_u64(watermark, f);
watermark = div_u64(watermark + params.error, f);
config->watermark = watermark + (config->bits_per_pixel / 8) + 2;
num_syms_per_line = (mode->hdisplay * config->bits_per_pixel) *
(link->num_lanes * 8);
if (config->watermark > 30) {
config->watermark = 30;
dev_err(sor->dev,
"unable to compute TU size, forcing watermark to %u\n",
config->watermark);
} else if (config->watermark > num_syms_per_line) {
config->watermark = num_syms_per_line;
dev_err(sor->dev, "watermark too high, forcing to %u\n",
config->watermark);
}
/* compute the number of symbols per horizontal blanking interval */
num = ((mode->htotal - mode->hdisplay) - 7) * link_rate;
config->hblank_symbols = div_u64(num, pclk);
if (link->capabilities & DP_LINK_CAP_ENHANCED_FRAMING)
config->hblank_symbols -= 3;
config->hblank_symbols -= 12 / link->num_lanes;
/* compute the number of symbols per vertical blanking interval */
num = (mode->hdisplay - 25) * link_rate;
config->vblank_symbols = div_u64(num, pclk);
config->vblank_symbols -= 36 / link->num_lanes + 4;
dev_dbg(sor->dev, "blank symbols: H:%u V:%u\n", config->hblank_symbols,
config->vblank_symbols);
return 0;
}
static void tegra_sor_apply_config(struct tegra_sor *sor,
const struct tegra_sor_config *config)
{
u32 value;
value = tegra_sor_readl(sor, SOR_DP_LINKCTL0);
value &= ~SOR_DP_LINKCTL_TU_SIZE_MASK;
value |= SOR_DP_LINKCTL_TU_SIZE(config->tu_size);
tegra_sor_writel(sor, value, SOR_DP_LINKCTL0);
value = tegra_sor_readl(sor, SOR_DP_CONFIG0);
value &= ~SOR_DP_CONFIG_WATERMARK_MASK;
value |= SOR_DP_CONFIG_WATERMARK(config->watermark);
value &= ~SOR_DP_CONFIG_ACTIVE_SYM_COUNT_MASK;
value |= SOR_DP_CONFIG_ACTIVE_SYM_COUNT(config->active_count);
value &= ~SOR_DP_CONFIG_ACTIVE_SYM_FRAC_MASK;
value |= SOR_DP_CONFIG_ACTIVE_SYM_FRAC(config->active_frac);
if (config->active_polarity)
value |= SOR_DP_CONFIG_ACTIVE_SYM_POLARITY;
else
value &= ~SOR_DP_CONFIG_ACTIVE_SYM_POLARITY;
value |= SOR_DP_CONFIG_ACTIVE_SYM_ENABLE;
value |= SOR_DP_CONFIG_DISPARITY_NEGATIVE;
tegra_sor_writel(sor, value, SOR_DP_CONFIG0);
value = tegra_sor_readl(sor, SOR_DP_AUDIO_HBLANK_SYMBOLS);
value &= ~SOR_DP_AUDIO_HBLANK_SYMBOLS_MASK;
value |= config->hblank_symbols & 0xffff;
tegra_sor_writel(sor, value, SOR_DP_AUDIO_HBLANK_SYMBOLS);
value = tegra_sor_readl(sor, SOR_DP_AUDIO_VBLANK_SYMBOLS);
value &= ~SOR_DP_AUDIO_VBLANK_SYMBOLS_MASK;
value |= config->vblank_symbols & 0xffff;
tegra_sor_writel(sor, value, SOR_DP_AUDIO_VBLANK_SYMBOLS);
}
static void tegra_sor_mode_set(struct tegra_sor *sor,
const struct drm_display_mode *mode,
struct tegra_sor_state *state)
{
struct tegra_dc *dc = to_tegra_dc(sor->output.encoder.crtc);
unsigned int vbe, vse, hbe, hse, vbs, hbs;
u32 value;
value = tegra_sor_readl(sor, SOR_STATE1);
value &= ~SOR_STATE_ASY_PIXELDEPTH_MASK;
value &= ~SOR_STATE_ASY_CRC_MODE_MASK;
value &= ~SOR_STATE_ASY_OWNER_MASK;
value |= SOR_STATE_ASY_CRC_MODE_COMPLETE |
SOR_STATE_ASY_OWNER(dc->pipe + 1);
if (mode->flags & DRM_MODE_FLAG_PHSYNC)
value &= ~SOR_STATE_ASY_HSYNCPOL;
if (mode->flags & DRM_MODE_FLAG_NHSYNC)
value |= SOR_STATE_ASY_HSYNCPOL;
if (mode->flags & DRM_MODE_FLAG_PVSYNC)
value &= ~SOR_STATE_ASY_VSYNCPOL;
if (mode->flags & DRM_MODE_FLAG_NVSYNC)
value |= SOR_STATE_ASY_VSYNCPOL;
switch (state->bpc) {
case 16:
value |= SOR_STATE_ASY_PIXELDEPTH_BPP_48_444;
break;
case 12:
value |= SOR_STATE_ASY_PIXELDEPTH_BPP_36_444;
break;
case 10:
value |= SOR_STATE_ASY_PIXELDEPTH_BPP_30_444;
break;
case 8:
value |= SOR_STATE_ASY_PIXELDEPTH_BPP_24_444;
break;
case 6:
value |= SOR_STATE_ASY_PIXELDEPTH_BPP_18_444;
break;
default:
value |= SOR_STATE_ASY_PIXELDEPTH_BPP_24_444;
break;
}
tegra_sor_writel(sor, value, SOR_STATE1);
/*
* TODO: The video timing programming below doesn't seem to match the
* register definitions.
*/
value = ((mode->vtotal & 0x7fff) << 16) | (mode->htotal & 0x7fff);
tegra_sor_writel(sor, value, sor->soc->regs->head_state1 + dc->pipe);
/* sync end = sync width - 1 */
vse = mode->vsync_end - mode->vsync_start - 1;
hse = mode->hsync_end - mode->hsync_start - 1;
value = ((vse & 0x7fff) << 16) | (hse & 0x7fff);
tegra_sor_writel(sor, value, sor->soc->regs->head_state2 + dc->pipe);
/* blank end = sync end + back porch */
vbe = vse + (mode->vtotal - mode->vsync_end);
hbe = hse + (mode->htotal - mode->hsync_end);
value = ((vbe & 0x7fff) << 16) | (hbe & 0x7fff);
tegra_sor_writel(sor, value, sor->soc->regs->head_state3 + dc->pipe);
/* blank start = blank end + active */
vbs = vbe + mode->vdisplay;
hbs = hbe + mode->hdisplay;
value = ((vbs & 0x7fff) << 16) | (hbs & 0x7fff);
tegra_sor_writel(sor, value, sor->soc->regs->head_state4 + dc->pipe);
/* XXX interlacing support */
tegra_sor_writel(sor, 0x001, sor->soc->regs->head_state5 + dc->pipe);
}
static int tegra_sor_detach(struct tegra_sor *sor)
{
unsigned long value, timeout;
/* switch to safe mode */
value = tegra_sor_readl(sor, SOR_SUPER_STATE1);
value &= ~SOR_SUPER_STATE_MODE_NORMAL;
tegra_sor_writel(sor, value, SOR_SUPER_STATE1);
tegra_sor_super_update(sor);
timeout = jiffies + msecs_to_jiffies(250);
while (time_before(jiffies, timeout)) {
value = tegra_sor_readl(sor, SOR_PWR);
if (value & SOR_PWR_MODE_SAFE)
break;
}
if ((value & SOR_PWR_MODE_SAFE) == 0)
return -ETIMEDOUT;
/* go to sleep */
value = tegra_sor_readl(sor, SOR_SUPER_STATE1);
value &= ~SOR_SUPER_STATE_HEAD_MODE_MASK;
tegra_sor_writel(sor, value, SOR_SUPER_STATE1);
tegra_sor_super_update(sor);
/* detach */
value = tegra_sor_readl(sor, SOR_SUPER_STATE1);
value &= ~SOR_SUPER_STATE_ATTACHED;
tegra_sor_writel(sor, value, SOR_SUPER_STATE1);
tegra_sor_super_update(sor);
timeout = jiffies + msecs_to_jiffies(250);
while (time_before(jiffies, timeout)) {
value = tegra_sor_readl(sor, SOR_TEST);
if ((value & SOR_TEST_ATTACHED) == 0)
break;
usleep_range(25, 100);
}
if ((value & SOR_TEST_ATTACHED) != 0)
return -ETIMEDOUT;
return 0;
}
static int tegra_sor_power_down(struct tegra_sor *sor)
{
unsigned long value, timeout;
int err;
value = tegra_sor_readl(sor, SOR_PWR);
value &= ~SOR_PWR_NORMAL_STATE_PU;
value |= SOR_PWR_TRIGGER;
tegra_sor_writel(sor, value, SOR_PWR);
timeout = jiffies + msecs_to_jiffies(250);
while (time_before(jiffies, timeout)) {
value = tegra_sor_readl(sor, SOR_PWR);
if ((value & SOR_PWR_TRIGGER) == 0)
return 0;
usleep_range(25, 100);
}
if ((value & SOR_PWR_TRIGGER) != 0)
return -ETIMEDOUT;
/* switch to safe parent clock */
err = tegra_sor_set_parent_clock(sor, sor->clk_safe);
if (err < 0) {
dev_err(sor->dev, "failed to set safe parent clock: %d\n", err);
return err;
}
value = tegra_sor_readl(sor, sor->soc->regs->dp_padctl0);
value &= ~(SOR_DP_PADCTL_PD_TXD_3 | SOR_DP_PADCTL_PD_TXD_0 |
SOR_DP_PADCTL_PD_TXD_1 | SOR_DP_PADCTL_PD_TXD_2);
tegra_sor_writel(sor, value, sor->soc->regs->dp_padctl0);
/* stop lane sequencer */
value = SOR_LANE_SEQ_CTL_TRIGGER | SOR_LANE_SEQ_CTL_SEQUENCE_UP |
SOR_LANE_SEQ_CTL_POWER_STATE_DOWN;
tegra_sor_writel(sor, value, SOR_LANE_SEQ_CTL);
timeout = jiffies + msecs_to_jiffies(250);
while (time_before(jiffies, timeout)) {
value = tegra_sor_readl(sor, SOR_LANE_SEQ_CTL);
if ((value & SOR_LANE_SEQ_CTL_TRIGGER) == 0)
break;
usleep_range(25, 100);
}
if ((value & SOR_LANE_SEQ_CTL_TRIGGER) != 0)
return -ETIMEDOUT;
value = tegra_sor_readl(sor, sor->soc->regs->pll2);
value |= SOR_PLL2_PORT_POWERDOWN;
tegra_sor_writel(sor, value, sor->soc->regs->pll2);
usleep_range(20, 100);
value = tegra_sor_readl(sor, sor->soc->regs->pll0);
value |= SOR_PLL0_VCOPD | SOR_PLL0_PWR;
tegra_sor_writel(sor, value, sor->soc->regs->pll0);
value = tegra_sor_readl(sor, sor->soc->regs->pll2);
value |= SOR_PLL2_SEQ_PLLCAPPD;
value |= SOR_PLL2_SEQ_PLLCAPPD_ENFORCE;
tegra_sor_writel(sor, value, sor->soc->regs->pll2);
usleep_range(20, 100);
return 0;
}
static int tegra_sor_crc_wait(struct tegra_sor *sor, unsigned long timeout)
{
u32 value;
timeout = jiffies + msecs_to_jiffies(timeout);
while (time_before(jiffies, timeout)) {
value = tegra_sor_readl(sor, SOR_CRCA);
if (value & SOR_CRCA_VALID)
return 0;
usleep_range(100, 200);
}
return -ETIMEDOUT;
}
static int tegra_sor_show_crc(struct seq_file *s, void *data)
{
struct drm_info_node *node = s->private;
struct tegra_sor *sor = node->info_ent->data;
struct drm_crtc *crtc = sor->output.encoder.crtc;
struct drm_device *drm = node->minor->dev;
int err = 0;
u32 value;
drm_modeset_lock_all(drm);
if (!crtc || !crtc->state->active) {
err = -EBUSY;
goto unlock;
}
value = tegra_sor_readl(sor, SOR_STATE1);
value &= ~SOR_STATE_ASY_CRC_MODE_MASK;
tegra_sor_writel(sor, value, SOR_STATE1);
value = tegra_sor_readl(sor, SOR_CRC_CNTRL);
value |= SOR_CRC_CNTRL_ENABLE;
tegra_sor_writel(sor, value, SOR_CRC_CNTRL);
value = tegra_sor_readl(sor, SOR_TEST);
value &= ~SOR_TEST_CRC_POST_SERIALIZE;
tegra_sor_writel(sor, value, SOR_TEST);
err = tegra_sor_crc_wait(sor, 100);
if (err < 0)
goto unlock;
tegra_sor_writel(sor, SOR_CRCA_RESET, SOR_CRCA);
value = tegra_sor_readl(sor, SOR_CRCB);
seq_printf(s, "%08x\n", value);
unlock:
drm_modeset_unlock_all(drm);
return err;
}
#define DEBUGFS_REG32(_name) { .name = #_name, .offset = _name }
static const struct debugfs_reg32 tegra_sor_regs[] = {
DEBUGFS_REG32(SOR_CTXSW),
DEBUGFS_REG32(SOR_SUPER_STATE0),
DEBUGFS_REG32(SOR_SUPER_STATE1),
DEBUGFS_REG32(SOR_STATE0),
DEBUGFS_REG32(SOR_STATE1),
DEBUGFS_REG32(SOR_HEAD_STATE0(0)),
DEBUGFS_REG32(SOR_HEAD_STATE0(1)),
DEBUGFS_REG32(SOR_HEAD_STATE1(0)),
DEBUGFS_REG32(SOR_HEAD_STATE1(1)),
DEBUGFS_REG32(SOR_HEAD_STATE2(0)),
DEBUGFS_REG32(SOR_HEAD_STATE2(1)),
DEBUGFS_REG32(SOR_HEAD_STATE3(0)),
DEBUGFS_REG32(SOR_HEAD_STATE3(1)),
DEBUGFS_REG32(SOR_HEAD_STATE4(0)),
DEBUGFS_REG32(SOR_HEAD_STATE4(1)),
DEBUGFS_REG32(SOR_HEAD_STATE5(0)),
DEBUGFS_REG32(SOR_HEAD_STATE5(1)),
DEBUGFS_REG32(SOR_CRC_CNTRL),
DEBUGFS_REG32(SOR_DP_DEBUG_MVID),
DEBUGFS_REG32(SOR_CLK_CNTRL),
DEBUGFS_REG32(SOR_CAP),
DEBUGFS_REG32(SOR_PWR),
DEBUGFS_REG32(SOR_TEST),
DEBUGFS_REG32(SOR_PLL0),
DEBUGFS_REG32(SOR_PLL1),
DEBUGFS_REG32(SOR_PLL2),
DEBUGFS_REG32(SOR_PLL3),
DEBUGFS_REG32(SOR_CSTM),
DEBUGFS_REG32(SOR_LVDS),
DEBUGFS_REG32(SOR_CRCA),
DEBUGFS_REG32(SOR_CRCB),
DEBUGFS_REG32(SOR_BLANK),
DEBUGFS_REG32(SOR_SEQ_CTL),
DEBUGFS_REG32(SOR_LANE_SEQ_CTL),
DEBUGFS_REG32(SOR_SEQ_INST(0)),
DEBUGFS_REG32(SOR_SEQ_INST(1)),
DEBUGFS_REG32(SOR_SEQ_INST(2)),
DEBUGFS_REG32(SOR_SEQ_INST(3)),
DEBUGFS_REG32(SOR_SEQ_INST(4)),
DEBUGFS_REG32(SOR_SEQ_INST(5)),
DEBUGFS_REG32(SOR_SEQ_INST(6)),
DEBUGFS_REG32(SOR_SEQ_INST(7)),
DEBUGFS_REG32(SOR_SEQ_INST(8)),
DEBUGFS_REG32(SOR_SEQ_INST(9)),
DEBUGFS_REG32(SOR_SEQ_INST(10)),
DEBUGFS_REG32(SOR_SEQ_INST(11)),
DEBUGFS_REG32(SOR_SEQ_INST(12)),
DEBUGFS_REG32(SOR_SEQ_INST(13)),
DEBUGFS_REG32(SOR_SEQ_INST(14)),
DEBUGFS_REG32(SOR_SEQ_INST(15)),
DEBUGFS_REG32(SOR_PWM_DIV),
DEBUGFS_REG32(SOR_PWM_CTL),
DEBUGFS_REG32(SOR_VCRC_A0),
DEBUGFS_REG32(SOR_VCRC_A1),
DEBUGFS_REG32(SOR_VCRC_B0),
DEBUGFS_REG32(SOR_VCRC_B1),
DEBUGFS_REG32(SOR_CCRC_A0),
DEBUGFS_REG32(SOR_CCRC_A1),
DEBUGFS_REG32(SOR_CCRC_B0),
DEBUGFS_REG32(SOR_CCRC_B1),
DEBUGFS_REG32(SOR_EDATA_A0),
DEBUGFS_REG32(SOR_EDATA_A1),
DEBUGFS_REG32(SOR_EDATA_B0),
DEBUGFS_REG32(SOR_EDATA_B1),
DEBUGFS_REG32(SOR_COUNT_A0),
DEBUGFS_REG32(SOR_COUNT_A1),
DEBUGFS_REG32(SOR_COUNT_B0),
DEBUGFS_REG32(SOR_COUNT_B1),
DEBUGFS_REG32(SOR_DEBUG_A0),
DEBUGFS_REG32(SOR_DEBUG_A1),
DEBUGFS_REG32(SOR_DEBUG_B0),
DEBUGFS_REG32(SOR_DEBUG_B1),
DEBUGFS_REG32(SOR_TRIG),
DEBUGFS_REG32(SOR_MSCHECK),
DEBUGFS_REG32(SOR_XBAR_CTRL),
DEBUGFS_REG32(SOR_XBAR_POL),
DEBUGFS_REG32(SOR_DP_LINKCTL0),
DEBUGFS_REG32(SOR_DP_LINKCTL1),
DEBUGFS_REG32(SOR_LANE_DRIVE_CURRENT0),
DEBUGFS_REG32(SOR_LANE_DRIVE_CURRENT1),
DEBUGFS_REG32(SOR_LANE4_DRIVE_CURRENT0),
DEBUGFS_REG32(SOR_LANE4_DRIVE_CURRENT1),
DEBUGFS_REG32(SOR_LANE_PREEMPHASIS0),
DEBUGFS_REG32(SOR_LANE_PREEMPHASIS1),
DEBUGFS_REG32(SOR_LANE4_PREEMPHASIS0),
DEBUGFS_REG32(SOR_LANE4_PREEMPHASIS1),
DEBUGFS_REG32(SOR_LANE_POSTCURSOR0),
DEBUGFS_REG32(SOR_LANE_POSTCURSOR1),
DEBUGFS_REG32(SOR_DP_CONFIG0),
DEBUGFS_REG32(SOR_DP_CONFIG1),
DEBUGFS_REG32(SOR_DP_MN0),
DEBUGFS_REG32(SOR_DP_MN1),
DEBUGFS_REG32(SOR_DP_PADCTL0),
DEBUGFS_REG32(SOR_DP_PADCTL1),
DEBUGFS_REG32(SOR_DP_PADCTL2),
DEBUGFS_REG32(SOR_DP_DEBUG0),
DEBUGFS_REG32(SOR_DP_DEBUG1),
DEBUGFS_REG32(SOR_DP_SPARE0),
DEBUGFS_REG32(SOR_DP_SPARE1),
DEBUGFS_REG32(SOR_DP_AUDIO_CTRL),
DEBUGFS_REG32(SOR_DP_AUDIO_HBLANK_SYMBOLS),
DEBUGFS_REG32(SOR_DP_AUDIO_VBLANK_SYMBOLS),
DEBUGFS_REG32(SOR_DP_GENERIC_INFOFRAME_HEADER),
DEBUGFS_REG32(SOR_DP_GENERIC_INFOFRAME_SUBPACK0),
DEBUGFS_REG32(SOR_DP_GENERIC_INFOFRAME_SUBPACK1),
DEBUGFS_REG32(SOR_DP_GENERIC_INFOFRAME_SUBPACK2),
DEBUGFS_REG32(SOR_DP_GENERIC_INFOFRAME_SUBPACK3),
DEBUGFS_REG32(SOR_DP_GENERIC_INFOFRAME_SUBPACK4),
DEBUGFS_REG32(SOR_DP_GENERIC_INFOFRAME_SUBPACK5),
DEBUGFS_REG32(SOR_DP_GENERIC_INFOFRAME_SUBPACK6),
DEBUGFS_REG32(SOR_DP_TPG),
DEBUGFS_REG32(SOR_DP_TPG_CONFIG),
DEBUGFS_REG32(SOR_DP_LQ_CSTM0),
DEBUGFS_REG32(SOR_DP_LQ_CSTM1),
DEBUGFS_REG32(SOR_DP_LQ_CSTM2),
};
static int tegra_sor_show_regs(struct seq_file *s, void *data)
{
struct drm_info_node *node = s->private;
struct tegra_sor *sor = node->info_ent->data;
struct drm_crtc *crtc = sor->output.encoder.crtc;
struct drm_device *drm = node->minor->dev;
unsigned int i;
int err = 0;
drm_modeset_lock_all(drm);
if (!crtc || !crtc->state->active) {
err = -EBUSY;
goto unlock;
}
for (i = 0; i < ARRAY_SIZE(tegra_sor_regs); i++) {
unsigned int offset = tegra_sor_regs[i].offset;
seq_printf(s, "%-38s %#05x %08x\n", tegra_sor_regs[i].name,
offset, tegra_sor_readl(sor, offset));
}
unlock:
drm_modeset_unlock_all(drm);
return err;
}
static const struct drm_info_list debugfs_files[] = {
{ "crc", tegra_sor_show_crc, 0, NULL },
{ "regs", tegra_sor_show_regs, 0, NULL },
};
static int tegra_sor_late_register(struct drm_connector *connector)
{
struct tegra_output *output = connector_to_output(connector);
unsigned int i, count = ARRAY_SIZE(debugfs_files);
struct drm_minor *minor = connector->dev->primary;
struct dentry *root = connector->debugfs_entry;
struct tegra_sor *sor = to_sor(output);
int err;
sor->debugfs_files = kmemdup(debugfs_files, sizeof(debugfs_files),
GFP_KERNEL);
if (!sor->debugfs_files)
return -ENOMEM;
for (i = 0; i < count; i++)
sor->debugfs_files[i].data = sor;
err = drm_debugfs_create_files(sor->debugfs_files, count, root, minor);
if (err < 0)
goto free;
return 0;
free:
kfree(sor->debugfs_files);
sor->debugfs_files = NULL;
return err;
}
static void tegra_sor_early_unregister(struct drm_connector *connector)
{
struct tegra_output *output = connector_to_output(connector);
unsigned int count = ARRAY_SIZE(debugfs_files);
struct tegra_sor *sor = to_sor(output);
drm_debugfs_remove_files(sor->debugfs_files, count,
connector->dev->primary);
kfree(sor->debugfs_files);
sor->debugfs_files = NULL;
}
static void tegra_sor_connector_reset(struct drm_connector *connector)
{
struct tegra_sor_state *state;
state = kzalloc(sizeof(*state), GFP_KERNEL);
if (!state)
return;
if (connector->state) {
__drm_atomic_helper_connector_destroy_state(connector->state);
kfree(connector->state);
}
__drm_atomic_helper_connector_reset(connector, &state->base);
}
static enum drm_connector_status
tegra_sor_connector_detect(struct drm_connector *connector, bool force)
{
struct tegra_output *output = connector_to_output(connector);
struct tegra_sor *sor = to_sor(output);
if (sor->aux)
return drm_dp_aux_detect(sor->aux);
return tegra_output_connector_detect(connector, force);
}
static struct drm_connector_state *
tegra_sor_connector_duplicate_state(struct drm_connector *connector)
{
struct tegra_sor_state *state = to_sor_state(connector->state);
struct tegra_sor_state *copy;
copy = kmemdup(state, sizeof(*state), GFP_KERNEL);
if (!copy)
return NULL;
__drm_atomic_helper_connector_duplicate_state(connector, &copy->base);
return &copy->base;
}
static const struct drm_connector_funcs tegra_sor_connector_funcs = {
.reset = tegra_sor_connector_reset,
.detect = tegra_sor_connector_detect,
.fill_modes = drm_helper_probe_single_connector_modes,
.destroy = tegra_output_connector_destroy,
.atomic_duplicate_state = tegra_sor_connector_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
.late_register = tegra_sor_late_register,
.early_unregister = tegra_sor_early_unregister,
};
static int tegra_sor_connector_get_modes(struct drm_connector *connector)
{
struct tegra_output *output = connector_to_output(connector);
struct tegra_sor *sor = to_sor(output);
int err;
if (sor->aux)
drm_dp_aux_enable(sor->aux);
err = tegra_output_connector_get_modes(connector);
if (sor->aux)
drm_dp_aux_disable(sor->aux);
return err;
}
static enum drm_mode_status
tegra_sor_connector_mode_valid(struct drm_connector *connector,
struct drm_display_mode *mode)
{
return MODE_OK;
}
static const struct drm_connector_helper_funcs tegra_sor_connector_helper_funcs = {
.get_modes = tegra_sor_connector_get_modes,
.mode_valid = tegra_sor_connector_mode_valid,
};
static const struct drm_encoder_funcs tegra_sor_encoder_funcs = {
.destroy = tegra_output_encoder_destroy,
};
static void tegra_sor_edp_disable(struct drm_encoder *encoder)
{
struct tegra_output *output = encoder_to_output(encoder);
struct tegra_dc *dc = to_tegra_dc(encoder->crtc);
struct tegra_sor *sor = to_sor(output);
u32 value;
int err;
if (output->panel)
drm_panel_disable(output->panel);
err = tegra_sor_detach(sor);
if (err < 0)
dev_err(sor->dev, "failed to detach SOR: %d\n", err);
tegra_sor_writel(sor, 0, SOR_STATE1);
tegra_sor_update(sor);
/*
* The following accesses registers of the display controller, so make
* sure it's only executed when the output is attached to one.
*/
if (dc) {
value = tegra_dc_readl(dc, DC_DISP_DISP_WIN_OPTIONS);
value &= ~SOR_ENABLE(0);
tegra_dc_writel(dc, value, DC_DISP_DISP_WIN_OPTIONS);
tegra_dc_commit(dc);
}
err = tegra_sor_power_down(sor);
if (err < 0)
dev_err(sor->dev, "failed to power down SOR: %d\n", err);
if (sor->aux) {
err = drm_dp_aux_disable(sor->aux);
if (err < 0)
dev_err(sor->dev, "failed to disable DP: %d\n", err);
}
err = tegra_io_pad_power_disable(sor->pad);
if (err < 0)
dev_err(sor->dev, "failed to power off I/O pad: %d\n", err);
if (output->panel)
drm_panel_unprepare(output->panel);
pm_runtime_put(sor->dev);
}
#if 0
static int calc_h_ref_to_sync(const struct drm_display_mode *mode,
unsigned int *value)
{
unsigned int hfp, hsw, hbp, a = 0, b;
hfp = mode->hsync_start - mode->hdisplay;
hsw = mode->hsync_end - mode->hsync_start;
hbp = mode->htotal - mode->hsync_end;
pr_info("hfp: %u, hsw: %u, hbp: %u\n", hfp, hsw, hbp);
b = hfp - 1;
pr_info("a: %u, b: %u\n", a, b);
pr_info("a + hsw + hbp = %u\n", a + hsw + hbp);
if (a + hsw + hbp <= 11) {
a = 1 + 11 - hsw - hbp;
pr_info("a: %u\n", a);
}
if (a > b)
return -EINVAL;
if (hsw < 1)
return -EINVAL;
if (mode->hdisplay < 16)
return -EINVAL;
if (value) {
if (b > a && a % 2)
*value = a + 1;
else
*value = a;
}
return 0;
}
#endif
static void tegra_sor_edp_enable(struct drm_encoder *encoder)
{
struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
struct tegra_output *output = encoder_to_output(encoder);
struct tegra_dc *dc = to_tegra_dc(encoder->crtc);
struct tegra_sor *sor = to_sor(output);
struct tegra_sor_config config;
struct tegra_sor_state *state;
struct drm_dp_link link;
u8 rate, lanes;
unsigned int i;
int err = 0;
u32 value;
state = to_sor_state(output->connector.state);
pm_runtime_get_sync(sor->dev);
if (output->panel)
drm_panel_prepare(output->panel);
err = drm_dp_aux_enable(sor->aux);
if (err < 0)
dev_err(sor->dev, "failed to enable DP: %d\n", err);
err = drm_dp_link_probe(sor->aux, &link);
if (err < 0) {
dev_err(sor->dev, "failed to probe eDP link: %d\n", err);
return;
}
/* switch to safe parent clock */
err = tegra_sor_set_parent_clock(sor, sor->clk_safe);
if (err < 0)
dev_err(sor->dev, "failed to set safe parent clock: %d\n", err);
memset(&config, 0, sizeof(config));
config.bits_per_pixel = state->bpc * 3;
err = tegra_sor_compute_config(sor, mode, &config, &link);
if (err < 0)
dev_err(sor->dev, "failed to compute configuration: %d\n", err);
value = tegra_sor_readl(sor, SOR_CLK_CNTRL);
value &= ~SOR_CLK_CNTRL_DP_CLK_SEL_MASK;
value |= SOR_CLK_CNTRL_DP_CLK_SEL_SINGLE_DPCLK;
tegra_sor_writel(sor, value, SOR_CLK_CNTRL);
value = tegra_sor_readl(sor, sor->soc->regs->pll2);
value &= ~SOR_PLL2_BANDGAP_POWERDOWN;
tegra_sor_writel(sor, value, sor->soc->regs->pll2);
usleep_range(20, 100);
value = tegra_sor_readl(sor, sor->soc->regs->pll3);
value |= SOR_PLL3_PLL_VDD_MODE_3V3;
tegra_sor_writel(sor, value, sor->soc->regs->pll3);
value = SOR_PLL0_ICHPMP(0xf) | SOR_PLL0_VCOCAP_RST |
SOR_PLL0_PLLREG_LEVEL_V45 | SOR_PLL0_RESISTOR_EXT;
tegra_sor_writel(sor, value, sor->soc->regs->pll0);
value = tegra_sor_readl(sor, sor->soc->regs->pll2);
value |= SOR_PLL2_SEQ_PLLCAPPD;
value &= ~SOR_PLL2_SEQ_PLLCAPPD_ENFORCE;
value |= SOR_PLL2_LVDS_ENABLE;
tegra_sor_writel(sor, value, sor->soc->regs->pll2);
value = SOR_PLL1_TERM_COMPOUT | SOR_PLL1_TMDS_TERM;
tegra_sor_writel(sor, value, sor->soc->regs->pll1);
while (true) {
value = tegra_sor_readl(sor, sor->soc->regs->pll2);
if ((value & SOR_PLL2_SEQ_PLLCAPPD_ENFORCE) == 0)
break;
usleep_range(250, 1000);
}
value = tegra_sor_readl(sor, sor->soc->regs->pll2);
value &= ~SOR_PLL2_POWERDOWN_OVERRIDE;
value &= ~SOR_PLL2_PORT_POWERDOWN;
tegra_sor_writel(sor, value, sor->soc->regs->pll2);
/*
* power up
*/
/* set safe link bandwidth (1.62 Gbps) */
value = tegra_sor_readl(sor, SOR_CLK_CNTRL);
value &= ~SOR_CLK_CNTRL_DP_LINK_SPEED_MASK;
value |= SOR_CLK_CNTRL_DP_LINK_SPEED_G1_62;
tegra_sor_writel(sor, value, SOR_CLK_CNTRL);
/* step 1 */
value = tegra_sor_readl(sor, sor->soc->regs->pll2);
value |= SOR_PLL2_SEQ_PLLCAPPD_ENFORCE | SOR_PLL2_PORT_POWERDOWN |
SOR_PLL2_BANDGAP_POWERDOWN;
tegra_sor_writel(sor, value, sor->soc->regs->pll2);
value = tegra_sor_readl(sor, sor->soc->regs->pll0);
value |= SOR_PLL0_VCOPD | SOR_PLL0_PWR;
tegra_sor_writel(sor, value, sor->soc->regs->pll0);
value = tegra_sor_readl(sor, sor->soc->regs->dp_padctl0);
value &= ~SOR_DP_PADCTL_PAD_CAL_PD;
tegra_sor_writel(sor, value, sor->soc->regs->dp_padctl0);
/* step 2 */
err = tegra_io_pad_power_enable(sor->pad);
if (err < 0)
dev_err(sor->dev, "failed to power on I/O pad: %d\n", err);
usleep_range(5, 100);
/* step 3 */
value = tegra_sor_readl(sor, sor->soc->regs->pll2);
value &= ~SOR_PLL2_BANDGAP_POWERDOWN;
tegra_sor_writel(sor, value, sor->soc->regs->pll2);
usleep_range(20, 100);
/* step 4 */
value = tegra_sor_readl(sor, sor->soc->regs->pll0);
value &= ~SOR_PLL0_VCOPD;
value &= ~SOR_PLL0_PWR;
tegra_sor_writel(sor, value, sor->soc->regs->pll0);
value = tegra_sor_readl(sor, sor->soc->regs->pll2);
value &= ~SOR_PLL2_SEQ_PLLCAPPD_ENFORCE;
tegra_sor_writel(sor, value, sor->soc->regs->pll2);
usleep_range(200, 1000);
/* step 5 */
value = tegra_sor_readl(sor, sor->soc->regs->pll2);
value &= ~SOR_PLL2_PORT_POWERDOWN;
tegra_sor_writel(sor, value, sor->soc->regs->pll2);
/* XXX not in TRM */
for (value = 0, i = 0; i < 5; i++)
value |= SOR_XBAR_CTRL_LINK0_XSEL(i, sor->soc->xbar_cfg[i]) |
SOR_XBAR_CTRL_LINK1_XSEL(i, i);
tegra_sor_writel(sor, 0x00000000, SOR_XBAR_POL);
tegra_sor_writel(sor, value, SOR_XBAR_CTRL);
/* switch to DP parent clock */
err = tegra_sor_set_parent_clock(sor, sor->clk_dp);
if (err < 0)
dev_err(sor->dev, "failed to set parent clock: %d\n", err);
/* power DP lanes */
value = tegra_sor_readl(sor, sor->soc->regs->dp_padctl0);
if (link.num_lanes <= 2)
value &= ~(SOR_DP_PADCTL_PD_TXD_3 | SOR_DP_PADCTL_PD_TXD_2);
else
value |= SOR_DP_PADCTL_PD_TXD_3 | SOR_DP_PADCTL_PD_TXD_2;
if (link.num_lanes <= 1)
value &= ~SOR_DP_PADCTL_PD_TXD_1;
else
value |= SOR_DP_PADCTL_PD_TXD_1;
if (link.num_lanes == 0)
value &= ~SOR_DP_PADCTL_PD_TXD_0;
else
value |= SOR_DP_PADCTL_PD_TXD_0;
tegra_sor_writel(sor, value, sor->soc->regs->dp_padctl0);
value = tegra_sor_readl(sor, SOR_DP_LINKCTL0);
value &= ~SOR_DP_LINKCTL_LANE_COUNT_MASK;
value |= SOR_DP_LINKCTL_LANE_COUNT(link.num_lanes);
tegra_sor_writel(sor, value, SOR_DP_LINKCTL0);
/* start lane sequencer */
value = SOR_LANE_SEQ_CTL_TRIGGER | SOR_LANE_SEQ_CTL_SEQUENCE_DOWN |
SOR_LANE_SEQ_CTL_POWER_STATE_UP;
tegra_sor_writel(sor, value, SOR_LANE_SEQ_CTL);
while (true) {
value = tegra_sor_readl(sor, SOR_LANE_SEQ_CTL);
if ((value & SOR_LANE_SEQ_CTL_TRIGGER) == 0)
break;
usleep_range(250, 1000);
}
/* set link bandwidth */
value = tegra_sor_readl(sor, SOR_CLK_CNTRL);
value &= ~SOR_CLK_CNTRL_DP_LINK_SPEED_MASK;
value |= drm_dp_link_rate_to_bw_code(link.rate) << 2;
tegra_sor_writel(sor, value, SOR_CLK_CNTRL);
tegra_sor_apply_config(sor, &config);
/* enable link */
value = tegra_sor_readl(sor, SOR_DP_LINKCTL0);
value |= SOR_DP_LINKCTL_ENABLE;
value |= SOR_DP_LINKCTL_ENHANCED_FRAME;
tegra_sor_writel(sor, value, SOR_DP_LINKCTL0);
for (i = 0, value = 0; i < 4; i++) {
unsigned long lane = SOR_DP_TPG_CHANNEL_CODING |
SOR_DP_TPG_SCRAMBLER_GALIOS |
SOR_DP_TPG_PATTERN_NONE;
value = (value << 8) | lane;
}
tegra_sor_writel(sor, value, SOR_DP_TPG);
/* enable pad calibration logic */
value = tegra_sor_readl(sor, sor->soc->regs->dp_padctl0);
value |= SOR_DP_PADCTL_PAD_CAL_PD;
tegra_sor_writel(sor, value, sor->soc->regs->dp_padctl0);
err = drm_dp_link_probe(sor->aux, &link);
if (err < 0)
dev_err(sor->dev, "failed to probe eDP link: %d\n", err);
err = drm_dp_link_power_up(sor->aux, &link);
if (err < 0)
dev_err(sor->dev, "failed to power up eDP link: %d\n", err);
err = drm_dp_link_configure(sor->aux, &link);
if (err < 0)
dev_err(sor->dev, "failed to configure eDP link: %d\n", err);
rate = drm_dp_link_rate_to_bw_code(link.rate);
lanes = link.num_lanes;
value = tegra_sor_readl(sor, SOR_CLK_CNTRL);
value &= ~SOR_CLK_CNTRL_DP_LINK_SPEED_MASK;
value |= SOR_CLK_CNTRL_DP_LINK_SPEED(rate);
tegra_sor_writel(sor, value, SOR_CLK_CNTRL);
value = tegra_sor_readl(sor, SOR_DP_LINKCTL0);
value &= ~SOR_DP_LINKCTL_LANE_COUNT_MASK;
value |= SOR_DP_LINKCTL_LANE_COUNT(lanes);
if (link.capabilities & DP_LINK_CAP_ENHANCED_FRAMING)
value |= SOR_DP_LINKCTL_ENHANCED_FRAME;
tegra_sor_writel(sor, value, SOR_DP_LINKCTL0);
/* disable training pattern generator */
for (i = 0; i < link.num_lanes; i++) {
unsigned long lane = SOR_DP_TPG_CHANNEL_CODING |
SOR_DP_TPG_SCRAMBLER_GALIOS |
SOR_DP_TPG_PATTERN_NONE;
value = (value << 8) | lane;
}
tegra_sor_writel(sor, value, SOR_DP_TPG);
err = tegra_sor_dp_train_fast(sor, &link);
if (err < 0)
dev_err(sor->dev, "DP fast link training failed: %d\n", err);
dev_dbg(sor->dev, "fast link training succeeded\n");
err = tegra_sor_power_up(sor, 250);
if (err < 0)
dev_err(sor->dev, "failed to power up SOR: %d\n", err);
/* CSTM (LVDS, link A/B, upper) */
value = SOR_CSTM_LVDS | SOR_CSTM_LINK_ACT_A | SOR_CSTM_LINK_ACT_B |
SOR_CSTM_UPPER;
tegra_sor_writel(sor, value, SOR_CSTM);
/* use DP-A protocol */
value = tegra_sor_readl(sor, SOR_STATE1);
value &= ~SOR_STATE_ASY_PROTOCOL_MASK;
value |= SOR_STATE_ASY_PROTOCOL_DP_A;
tegra_sor_writel(sor, value, SOR_STATE1);
tegra_sor_mode_set(sor, mode, state);
/* PWM setup */
err = tegra_sor_setup_pwm(sor, 250);
if (err < 0)
dev_err(sor->dev, "failed to setup PWM: %d\n", err);
tegra_sor_update(sor);
value = tegra_dc_readl(dc, DC_DISP_DISP_WIN_OPTIONS);
value |= SOR_ENABLE(0);
tegra_dc_writel(dc, value, DC_DISP_DISP_WIN_OPTIONS);
tegra_dc_commit(dc);
err = tegra_sor_attach(sor);
if (err < 0)
dev_err(sor->dev, "failed to attach SOR: %d\n", err);
err = tegra_sor_wakeup(sor);
if (err < 0)
dev_err(sor->dev, "failed to enable DC: %d\n", err);
if (output->panel)
drm_panel_enable(output->panel);
}
static int
tegra_sor_encoder_atomic_check(struct drm_encoder *encoder,
struct drm_crtc_state *crtc_state,
struct drm_connector_state *conn_state)
{
struct tegra_output *output = encoder_to_output(encoder);
struct tegra_sor_state *state = to_sor_state(conn_state);
struct tegra_dc *dc = to_tegra_dc(conn_state->crtc);
unsigned long pclk = crtc_state->mode.clock * 1000;
struct tegra_sor *sor = to_sor(output);
struct drm_display_info *info;
int err;
info = &output->connector.display_info;
/*
* For HBR2 modes, the SOR brick needs to use the x20 multiplier, so
* the pixel clock must be corrected accordingly.
*/
if (pclk >= 340000000) {
state->link_speed = 20;
state->pclk = pclk / 2;
} else {
state->link_speed = 10;
state->pclk = pclk;
}
err = tegra_dc_state_setup_clock(dc, crtc_state, sor->clk_parent,
pclk, 0);
if (err < 0) {
dev_err(output->dev, "failed to setup CRTC state: %d\n", err);
return err;
}
switch (info->bpc) {
case 8:
case 6:
state->bpc = info->bpc;
break;
default:
DRM_DEBUG_KMS("%u bits-per-color not supported\n", info->bpc);
state->bpc = 8;
break;
}
return 0;
}
static const struct drm_encoder_helper_funcs tegra_sor_edp_helpers = {
.disable = tegra_sor_edp_disable,
.enable = tegra_sor_edp_enable,
.atomic_check = tegra_sor_encoder_atomic_check,
};
static inline u32 tegra_sor_hdmi_subpack(const u8 *ptr, size_t size)
{
u32 value = 0;
size_t i;
for (i = size; i > 0; i--)
value = (value << 8) | ptr[i - 1];
return value;
}
static void tegra_sor_hdmi_write_infopack(struct tegra_sor *sor,
const void *data, size_t size)
{
const u8 *ptr = data;
unsigned long offset;
size_t i, j;
u32 value;
switch (ptr[0]) {
case HDMI_INFOFRAME_TYPE_AVI:
offset = SOR_HDMI_AVI_INFOFRAME_HEADER;
break;
case HDMI_INFOFRAME_TYPE_AUDIO:
offset = SOR_HDMI_AUDIO_INFOFRAME_HEADER;
break;
case HDMI_INFOFRAME_TYPE_VENDOR:
offset = SOR_HDMI_VSI_INFOFRAME_HEADER;
break;
default:
dev_err(sor->dev, "unsupported infoframe type: %02x\n",
ptr[0]);
return;
}
value = INFOFRAME_HEADER_TYPE(ptr[0]) |
INFOFRAME_HEADER_VERSION(ptr[1]) |
INFOFRAME_HEADER_LEN(ptr[2]);
tegra_sor_writel(sor, value, offset);
offset++;
/*
* Each subpack contains 7 bytes, divided into:
* - subpack_low: bytes 0 - 3
* - subpack_high: bytes 4 - 6 (with byte 7 padded to 0x00)
*/
for (i = 3, j = 0; i < size; i += 7, j += 8) {
size_t rem = size - i, num = min_t(size_t, rem, 4);
value = tegra_sor_hdmi_subpack(&ptr[i], num);
tegra_sor_writel(sor, value, offset++);
num = min_t(size_t, rem - num, 3);
value = tegra_sor_hdmi_subpack(&ptr[i + 4], num);
tegra_sor_writel(sor, value, offset++);
}
}
static int
tegra_sor_hdmi_setup_avi_infoframe(struct tegra_sor *sor,
const struct drm_display_mode *mode)
{
u8 buffer[HDMI_INFOFRAME_SIZE(AVI)];
struct hdmi_avi_infoframe frame;
u32 value;
int err;
/* disable AVI infoframe */
value = tegra_sor_readl(sor, SOR_HDMI_AVI_INFOFRAME_CTRL);
value &= ~INFOFRAME_CTRL_SINGLE;
value &= ~INFOFRAME_CTRL_OTHER;
value &= ~INFOFRAME_CTRL_ENABLE;
tegra_sor_writel(sor, value, SOR_HDMI_AVI_INFOFRAME_CTRL);
err = drm_hdmi_avi_infoframe_from_display_mode(&frame, mode, false);
if (err < 0) {
dev_err(sor->dev, "failed to setup AVI infoframe: %d\n", err);
return err;
}
err = hdmi_avi_infoframe_pack(&frame, buffer, sizeof(buffer));
if (err < 0) {
dev_err(sor->dev, "failed to pack AVI infoframe: %d\n", err);
return err;
}
tegra_sor_hdmi_write_infopack(sor, buffer, err);
/* enable AVI infoframe */
value = tegra_sor_readl(sor, SOR_HDMI_AVI_INFOFRAME_CTRL);
value |= INFOFRAME_CTRL_CHECKSUM_ENABLE;
value |= INFOFRAME_CTRL_ENABLE;
tegra_sor_writel(sor, value, SOR_HDMI_AVI_INFOFRAME_CTRL);
return 0;
}
static void tegra_sor_write_eld(struct tegra_sor *sor)
{
size_t length = drm_eld_size(sor->output.connector.eld), i;
for (i = 0; i < length; i++)
tegra_sor_writel(sor, i << 8 | sor->output.connector.eld[i],
SOR_AUDIO_HDA_ELD_BUFWR);
/*
* The HDA codec will always report an ELD buffer size of 96 bytes and
* the HDA codec driver will check that each byte read from the buffer
* is valid. Therefore every byte must be written, even if no 96 bytes
* were parsed from EDID.
*/
for (i = length; i < 96; i++)
tegra_sor_writel(sor, i << 8 | 0, SOR_AUDIO_HDA_ELD_BUFWR);
}
static void tegra_sor_audio_prepare(struct tegra_sor *sor)
{
u32 value;
tegra_sor_write_eld(sor);
value = SOR_AUDIO_HDA_PRESENSE_ELDV | SOR_AUDIO_HDA_PRESENSE_PD;
tegra_sor_writel(sor, value, SOR_AUDIO_HDA_PRESENSE);
}
static void tegra_sor_audio_unprepare(struct tegra_sor *sor)
{
tegra_sor_writel(sor, 0, SOR_AUDIO_HDA_PRESENSE);
}
static int tegra_sor_hdmi_enable_audio_infoframe(struct tegra_sor *sor)
{
u8 buffer[HDMI_INFOFRAME_SIZE(AUDIO)];
struct hdmi_audio_infoframe frame;
u32 value;
int err;
err = hdmi_audio_infoframe_init(&frame);
if (err < 0) {
dev_err(sor->dev, "failed to setup audio infoframe: %d\n", err);
return err;
}
frame.channels = sor->audio.channels;
err = hdmi_audio_infoframe_pack(&frame, buffer, sizeof(buffer));
if (err < 0) {
dev_err(sor->dev, "failed to pack audio infoframe: %d\n", err);
return err;
}
tegra_sor_hdmi_write_infopack(sor, buffer, err);
value = tegra_sor_readl(sor, SOR_HDMI_AUDIO_INFOFRAME_CTRL);
value |= INFOFRAME_CTRL_CHECKSUM_ENABLE;
value |= INFOFRAME_CTRL_ENABLE;
tegra_sor_writel(sor, value, SOR_HDMI_AUDIO_INFOFRAME_CTRL);
return 0;
}
static void tegra_sor_hdmi_audio_enable(struct tegra_sor *sor)
{
u32 value;
value = tegra_sor_readl(sor, SOR_AUDIO_CNTRL);
/* select HDA audio input */
value &= ~SOR_AUDIO_CNTRL_SOURCE_SELECT(SOURCE_SELECT_MASK);
value |= SOR_AUDIO_CNTRL_SOURCE_SELECT(SOURCE_SELECT_HDA);
/* inject null samples */
if (sor->audio.channels != 2)
value &= ~SOR_AUDIO_CNTRL_INJECT_NULLSMPL;
else
value |= SOR_AUDIO_CNTRL_INJECT_NULLSMPL;
value |= SOR_AUDIO_CNTRL_AFIFO_FLUSH;
tegra_sor_writel(sor, value, SOR_AUDIO_CNTRL);
/* enable advertising HBR capability */
tegra_sor_writel(sor, SOR_AUDIO_SPARE_HBR_ENABLE, SOR_AUDIO_SPARE);
tegra_sor_writel(sor, 0, SOR_HDMI_ACR_CTRL);
value = SOR_HDMI_SPARE_ACR_PRIORITY_HIGH |
SOR_HDMI_SPARE_CTS_RESET(1) |
SOR_HDMI_SPARE_HW_CTS_ENABLE;
tegra_sor_writel(sor, value, SOR_HDMI_SPARE);
/* enable HW CTS */
value = SOR_HDMI_ACR_SUBPACK_LOW_SB1(0);
tegra_sor_writel(sor, value, SOR_HDMI_ACR_0441_SUBPACK_LOW);
/* allow packet to be sent */
value = SOR_HDMI_ACR_SUBPACK_HIGH_ENABLE;
tegra_sor_writel(sor, value, SOR_HDMI_ACR_0441_SUBPACK_HIGH);
/* reset N counter and enable lookup */
value = SOR_HDMI_AUDIO_N_RESET | SOR_HDMI_AUDIO_N_LOOKUP;
tegra_sor_writel(sor, value, SOR_HDMI_AUDIO_N);
value = (24000 * 4096) / (128 * sor->audio.sample_rate / 1000);
tegra_sor_writel(sor, value, SOR_AUDIO_AVAL_0320);
tegra_sor_writel(sor, 4096, SOR_AUDIO_NVAL_0320);
tegra_sor_writel(sor, 20000, SOR_AUDIO_AVAL_0441);
tegra_sor_writel(sor, 4704, SOR_AUDIO_NVAL_0441);
tegra_sor_writel(sor, 20000, SOR_AUDIO_AVAL_0882);
tegra_sor_writel(sor, 9408, SOR_AUDIO_NVAL_0882);
tegra_sor_writel(sor, 20000, SOR_AUDIO_AVAL_1764);
tegra_sor_writel(sor, 18816, SOR_AUDIO_NVAL_1764);
value = (24000 * 6144) / (128 * sor->audio.sample_rate / 1000);
tegra_sor_writel(sor, value, SOR_AUDIO_AVAL_0480);
tegra_sor_writel(sor, 6144, SOR_AUDIO_NVAL_0480);
value = (24000 * 12288) / (128 * sor->audio.sample_rate / 1000);
tegra_sor_writel(sor, value, SOR_AUDIO_AVAL_0960);
tegra_sor_writel(sor, 12288, SOR_AUDIO_NVAL_0960);
value = (24000 * 24576) / (128 * sor->audio.sample_rate / 1000);
tegra_sor_writel(sor, value, SOR_AUDIO_AVAL_1920);
tegra_sor_writel(sor, 24576, SOR_AUDIO_NVAL_1920);
value = tegra_sor_readl(sor, SOR_HDMI_AUDIO_N);
value &= ~SOR_HDMI_AUDIO_N_RESET;
tegra_sor_writel(sor, value, SOR_HDMI_AUDIO_N);
tegra_sor_hdmi_enable_audio_infoframe(sor);
}
static void tegra_sor_hdmi_disable_audio_infoframe(struct tegra_sor *sor)
{
u32 value;
value = tegra_sor_readl(sor, SOR_HDMI_AUDIO_INFOFRAME_CTRL);
value &= ~INFOFRAME_CTRL_ENABLE;
tegra_sor_writel(sor, value, SOR_HDMI_AUDIO_INFOFRAME_CTRL);
}
static void tegra_sor_hdmi_audio_disable(struct tegra_sor *sor)
{
tegra_sor_hdmi_disable_audio_infoframe(sor);
}
static struct tegra_sor_hdmi_settings *
tegra_sor_hdmi_find_settings(struct tegra_sor *sor, unsigned long frequency)
{
unsigned int i;
for (i = 0; i < sor->num_settings; i++)
if (frequency <= sor->settings[i].frequency)
return &sor->settings[i];
return NULL;
}
static void tegra_sor_hdmi_disable_scrambling(struct tegra_sor *sor)
{
u32 value;
value = tegra_sor_readl(sor, SOR_HDMI2_CTRL);
value &= ~SOR_HDMI2_CTRL_CLOCK_MODE_DIV_BY_4;
value &= ~SOR_HDMI2_CTRL_SCRAMBLE;
tegra_sor_writel(sor, value, SOR_HDMI2_CTRL);
}
static void tegra_sor_hdmi_scdc_disable(struct tegra_sor *sor)
{
struct i2c_adapter *ddc = sor->output.ddc;
drm_scdc_set_high_tmds_clock_ratio(ddc, false);
drm_scdc_set_scrambling(ddc, false);
tegra_sor_hdmi_disable_scrambling(sor);
}
static void tegra_sor_hdmi_scdc_stop(struct tegra_sor *sor)
{
if (sor->scdc_enabled) {
cancel_delayed_work_sync(&sor->scdc);
tegra_sor_hdmi_scdc_disable(sor);
}
}
static void tegra_sor_hdmi_enable_scrambling(struct tegra_sor *sor)
{
u32 value;
value = tegra_sor_readl(sor, SOR_HDMI2_CTRL);
value |= SOR_HDMI2_CTRL_CLOCK_MODE_DIV_BY_4;
value |= SOR_HDMI2_CTRL_SCRAMBLE;
tegra_sor_writel(sor, value, SOR_HDMI2_CTRL);
}
static void tegra_sor_hdmi_scdc_enable(struct tegra_sor *sor)
{
struct i2c_adapter *ddc = sor->output.ddc;
drm_scdc_set_high_tmds_clock_ratio(ddc, true);
drm_scdc_set_scrambling(ddc, true);
tegra_sor_hdmi_enable_scrambling(sor);
}
static void tegra_sor_hdmi_scdc_work(struct work_struct *work)
{
struct tegra_sor *sor = container_of(work, struct tegra_sor, scdc.work);
struct i2c_adapter *ddc = sor->output.ddc;
if (!drm_scdc_get_scrambling_status(ddc)) {
DRM_DEBUG_KMS("SCDC not scrambled\n");
tegra_sor_hdmi_scdc_enable(sor);
}
schedule_delayed_work(&sor->scdc, msecs_to_jiffies(5000));
}
static void tegra_sor_hdmi_scdc_start(struct tegra_sor *sor)
{
struct drm_scdc *scdc = &sor->output.connector.display_info.hdmi.scdc;
struct drm_display_mode *mode;
mode = &sor->output.encoder.crtc->state->adjusted_mode;
if (mode->clock >= 340000 && scdc->supported) {
schedule_delayed_work(&sor->scdc, msecs_to_jiffies(5000));
tegra_sor_hdmi_scdc_enable(sor);
sor->scdc_enabled = true;
}
}
static void tegra_sor_hdmi_disable(struct drm_encoder *encoder)
{
struct tegra_output *output = encoder_to_output(encoder);
struct tegra_dc *dc = to_tegra_dc(encoder->crtc);
struct tegra_sor *sor = to_sor(output);
u32 value;
int err;
tegra_sor_audio_unprepare(sor);
tegra_sor_hdmi_scdc_stop(sor);
err = tegra_sor_detach(sor);
if (err < 0)
dev_err(sor->dev, "failed to detach SOR: %d\n", err);
tegra_sor_writel(sor, 0, SOR_STATE1);
tegra_sor_update(sor);
/* disable display to SOR clock */
value = tegra_dc_readl(dc, DC_DISP_DISP_WIN_OPTIONS);
if (!sor->soc->has_nvdisplay)
value &= ~(SOR1_TIMING_CYA | SOR_ENABLE(1));
else
value &= ~SOR_ENABLE(sor->index);
tegra_dc_writel(dc, value, DC_DISP_DISP_WIN_OPTIONS);
tegra_dc_commit(dc);
err = tegra_sor_power_down(sor);
if (err < 0)
dev_err(sor->dev, "failed to power down SOR: %d\n", err);
err = tegra_io_pad_power_disable(sor->pad);
if (err < 0)
dev_err(sor->dev, "failed to power off I/O pad: %d\n", err);
pm_runtime_put(sor->dev);
}
static void tegra_sor_hdmi_enable(struct drm_encoder *encoder)
{
struct tegra_output *output = encoder_to_output(encoder);
unsigned int h_ref_to_sync = 1, pulse_start, max_ac;
struct tegra_dc *dc = to_tegra_dc(encoder->crtc);
struct tegra_sor_hdmi_settings *settings;
struct tegra_sor *sor = to_sor(output);
struct tegra_sor_state *state;
struct drm_display_mode *mode;
unsigned long rate, pclk;
unsigned int div, i;
u32 value;
int err;
state = to_sor_state(output->connector.state);
mode = &encoder->crtc->state->adjusted_mode;
pclk = mode->clock * 1000;
pm_runtime_get_sync(sor->dev);
/* switch to safe parent clock */
err = tegra_sor_set_parent_clock(sor, sor->clk_safe);
if (err < 0) {
dev_err(sor->dev, "failed to set safe parent clock: %d\n", err);
return;
}
div = clk_get_rate(sor->clk) / 1000000 * 4;
err = tegra_io_pad_power_enable(sor->pad);
if (err < 0)
dev_err(sor->dev, "failed to power on I/O pad: %d\n", err);
usleep_range(20, 100);
value = tegra_sor_readl(sor, sor->soc->regs->pll2);
value &= ~SOR_PLL2_BANDGAP_POWERDOWN;
tegra_sor_writel(sor, value, sor->soc->regs->pll2);
usleep_range(20, 100);
value = tegra_sor_readl(sor, sor->soc->regs->pll3);
value &= ~SOR_PLL3_PLL_VDD_MODE_3V3;
tegra_sor_writel(sor, value, sor->soc->regs->pll3);
value = tegra_sor_readl(sor, sor->soc->regs->pll0);
value &= ~SOR_PLL0_VCOPD;
value &= ~SOR_PLL0_PWR;
tegra_sor_writel(sor, value, sor->soc->regs->pll0);
value = tegra_sor_readl(sor, sor->soc->regs->pll2);
value &= ~SOR_PLL2_SEQ_PLLCAPPD_ENFORCE;
tegra_sor_writel(sor, value, sor->soc->regs->pll2);
usleep_range(200, 400);
value = tegra_sor_readl(sor, sor->soc->regs->pll2);
value &= ~SOR_PLL2_POWERDOWN_OVERRIDE;
value &= ~SOR_PLL2_PORT_POWERDOWN;
tegra_sor_writel(sor, value, sor->soc->regs->pll2);
usleep_range(20, 100);
value = tegra_sor_readl(sor, sor->soc->regs->dp_padctl0);
value |= SOR_DP_PADCTL_PD_TXD_3 | SOR_DP_PADCTL_PD_TXD_0 |
SOR_DP_PADCTL_PD_TXD_1 | SOR_DP_PADCTL_PD_TXD_2;
tegra_sor_writel(sor, value, sor->soc->regs->dp_padctl0);
while (true) {
value = tegra_sor_readl(sor, SOR_LANE_SEQ_CTL);
if ((value & SOR_LANE_SEQ_CTL_STATE_BUSY) == 0)
break;
usleep_range(250, 1000);
}
value = SOR_LANE_SEQ_CTL_TRIGGER | SOR_LANE_SEQ_CTL_SEQUENCE_DOWN |
SOR_LANE_SEQ_CTL_POWER_STATE_UP | SOR_LANE_SEQ_CTL_DELAY(5);
tegra_sor_writel(sor, value, SOR_LANE_SEQ_CTL);
while (true) {
value = tegra_sor_readl(sor, SOR_LANE_SEQ_CTL);
if ((value & SOR_LANE_SEQ_CTL_TRIGGER) == 0)
break;
usleep_range(250, 1000);
}
value = tegra_sor_readl(sor, SOR_CLK_CNTRL);
value &= ~SOR_CLK_CNTRL_DP_LINK_SPEED_MASK;
value &= ~SOR_CLK_CNTRL_DP_CLK_SEL_MASK;
if (mode->clock < 340000) {
DRM_DEBUG_KMS("setting 2.7 GHz link speed\n");
value |= SOR_CLK_CNTRL_DP_LINK_SPEED_G2_70;
} else {
DRM_DEBUG_KMS("setting 5.4 GHz link speed\n");
value |= SOR_CLK_CNTRL_DP_LINK_SPEED_G5_40;
}
value |= SOR_CLK_CNTRL_DP_CLK_SEL_SINGLE_PCLK;
tegra_sor_writel(sor, value, SOR_CLK_CNTRL);
/* SOR pad PLL stabilization time */
usleep_range(250, 1000);
value = tegra_sor_readl(sor, SOR_DP_LINKCTL0);
value &= ~SOR_DP_LINKCTL_LANE_COUNT_MASK;
value |= SOR_DP_LINKCTL_LANE_COUNT(4);
tegra_sor_writel(sor, value, SOR_DP_LINKCTL0);
value = tegra_sor_readl(sor, SOR_DP_SPARE0);
value &= ~SOR_DP_SPARE_DISP_VIDEO_PREAMBLE;
value &= ~SOR_DP_SPARE_PANEL_INTERNAL;
value &= ~SOR_DP_SPARE_SEQ_ENABLE;
value &= ~SOR_DP_SPARE_MACRO_SOR_CLK;
tegra_sor_writel(sor, value, SOR_DP_SPARE0);
value = SOR_SEQ_CTL_PU_PC(0) | SOR_SEQ_CTL_PU_PC_ALT(0) |
SOR_SEQ_CTL_PD_PC(8) | SOR_SEQ_CTL_PD_PC_ALT(8);
tegra_sor_writel(sor, value, SOR_SEQ_CTL);
value = SOR_SEQ_INST_DRIVE_PWM_OUT_LO | SOR_SEQ_INST_HALT |
SOR_SEQ_INST_WAIT_VSYNC | SOR_SEQ_INST_WAIT(1);
tegra_sor_writel(sor, value, SOR_SEQ_INST(0));
tegra_sor_writel(sor, value, SOR_SEQ_INST(8));
if (!sor->soc->has_nvdisplay) {
/* program the reference clock */
value = SOR_REFCLK_DIV_INT(div) | SOR_REFCLK_DIV_FRAC(div);
tegra_sor_writel(sor, value, SOR_REFCLK);
}
/* XXX not in TRM */
for (value = 0, i = 0; i < 5; i++)
value |= SOR_XBAR_CTRL_LINK0_XSEL(i, sor->soc->xbar_cfg[i]) |
SOR_XBAR_CTRL_LINK1_XSEL(i, i);
tegra_sor_writel(sor, 0x00000000, SOR_XBAR_POL);
tegra_sor_writel(sor, value, SOR_XBAR_CTRL);
/* switch to parent clock */
err = clk_set_parent(sor->clk, sor->clk_parent);
if (err < 0) {
dev_err(sor->dev, "failed to set parent clock: %d\n", err);
return;
}
err = tegra_sor_set_parent_clock(sor, sor->clk_pad);
if (err < 0) {
dev_err(sor->dev, "failed to set pad clock: %d\n", err);
return;
}
/* adjust clock rate for HDMI 2.0 modes */
rate = clk_get_rate(sor->clk_parent);
if (mode->clock >= 340000)
rate /= 2;
DRM_DEBUG_KMS("setting clock to %lu Hz, mode: %lu Hz\n", rate, pclk);
clk_set_rate(sor->clk, rate);
if (!sor->soc->has_nvdisplay) {
value = SOR_INPUT_CONTROL_HDMI_SRC_SELECT(dc->pipe);
/* XXX is this the proper check? */
if (mode->clock < 75000)
value |= SOR_INPUT_CONTROL_ARM_VIDEO_RANGE_LIMITED;
tegra_sor_writel(sor, value, SOR_INPUT_CONTROL);
}
max_ac = ((mode->htotal - mode->hdisplay) - SOR_REKEY - 18) / 32;
value = SOR_HDMI_CTRL_ENABLE | SOR_HDMI_CTRL_MAX_AC_PACKET(max_ac) |
SOR_HDMI_CTRL_AUDIO_LAYOUT | SOR_HDMI_CTRL_REKEY(SOR_REKEY);
tegra_sor_writel(sor, value, SOR_HDMI_CTRL);
if (!dc->soc->has_nvdisplay) {
/* H_PULSE2 setup */
pulse_start = h_ref_to_sync +
(mode->hsync_end - mode->hsync_start) +
(mode->htotal - mode->hsync_end) - 10;
value = PULSE_LAST_END_A | PULSE_QUAL_VACTIVE |
PULSE_POLARITY_HIGH | PULSE_MODE_NORMAL;
tegra_dc_writel(dc, value, DC_DISP_H_PULSE2_CONTROL);
value = PULSE_END(pulse_start + 8) | PULSE_START(pulse_start);
tegra_dc_writel(dc, value, DC_DISP_H_PULSE2_POSITION_A);
value = tegra_dc_readl(dc, DC_DISP_DISP_SIGNAL_OPTIONS0);
value |= H_PULSE2_ENABLE;
tegra_dc_writel(dc, value, DC_DISP_DISP_SIGNAL_OPTIONS0);
}
/* infoframe setup */
err = tegra_sor_hdmi_setup_avi_infoframe(sor, mode);
if (err < 0)
dev_err(sor->dev, "failed to setup AVI infoframe: %d\n", err);
/* XXX HDMI audio support not implemented yet */
tegra_sor_hdmi_disable_audio_infoframe(sor);
/* use single TMDS protocol */
value = tegra_sor_readl(sor, SOR_STATE1);
value &= ~SOR_STATE_ASY_PROTOCOL_MASK;
value |= SOR_STATE_ASY_PROTOCOL_SINGLE_TMDS_A;
tegra_sor_writel(sor, value, SOR_STATE1);
/* power up pad calibration */
value = tegra_sor_readl(sor, sor->soc->regs->dp_padctl0);
value &= ~SOR_DP_PADCTL_PAD_CAL_PD;
tegra_sor_writel(sor, value, sor->soc->regs->dp_padctl0);
/* production settings */
settings = tegra_sor_hdmi_find_settings(sor, mode->clock * 1000);
if (!settings) {
dev_err(sor->dev, "no settings for pixel clock %d Hz\n",
mode->clock * 1000);
return;
}
value = tegra_sor_readl(sor, sor->soc->regs->pll0);
value &= ~SOR_PLL0_ICHPMP_MASK;
value &= ~SOR_PLL0_FILTER_MASK;
value &= ~SOR_PLL0_VCOCAP_MASK;
value |= SOR_PLL0_ICHPMP(settings->ichpmp);
value |= SOR_PLL0_FILTER(settings->filter);
value |= SOR_PLL0_VCOCAP(settings->vcocap);
tegra_sor_writel(sor, value, sor->soc->regs->pll0);
/* XXX not in TRM */
value = tegra_sor_readl(sor, sor->soc->regs->pll1);
value &= ~SOR_PLL1_LOADADJ_MASK;
value &= ~SOR_PLL1_TMDS_TERMADJ_MASK;
value |= SOR_PLL1_LOADADJ(settings->loadadj);
value |= SOR_PLL1_TMDS_TERMADJ(settings->tmds_termadj);
value |= SOR_PLL1_TMDS_TERM;
tegra_sor_writel(sor, value, sor->soc->regs->pll1);
value = tegra_sor_readl(sor, sor->soc->regs->pll3);
value &= ~SOR_PLL3_BG_TEMP_COEF_MASK;
value &= ~SOR_PLL3_BG_VREF_LEVEL_MASK;
value &= ~SOR_PLL3_AVDD10_LEVEL_MASK;
value &= ~SOR_PLL3_AVDD14_LEVEL_MASK;
value |= SOR_PLL3_BG_TEMP_COEF(settings->bg_temp_coef);
value |= SOR_PLL3_BG_VREF_LEVEL(settings->bg_vref_level);
value |= SOR_PLL3_AVDD10_LEVEL(settings->avdd10_level);
value |= SOR_PLL3_AVDD14_LEVEL(settings->avdd14_level);
tegra_sor_writel(sor, value, sor->soc->regs->pll3);
value = settings->drive_current[3] << 24 |
settings->drive_current[2] << 16 |
settings->drive_current[1] << 8 |
settings->drive_current[0] << 0;
tegra_sor_writel(sor, value, SOR_LANE_DRIVE_CURRENT0);
value = settings->preemphasis[3] << 24 |
settings->preemphasis[2] << 16 |
settings->preemphasis[1] << 8 |
settings->preemphasis[0] << 0;
tegra_sor_writel(sor, value, SOR_LANE_PREEMPHASIS0);
value = tegra_sor_readl(sor, sor->soc->regs->dp_padctl0);
value &= ~SOR_DP_PADCTL_TX_PU_MASK;
value |= SOR_DP_PADCTL_TX_PU_ENABLE;
value |= SOR_DP_PADCTL_TX_PU(settings->tx_pu_value);
tegra_sor_writel(sor, value, sor->soc->regs->dp_padctl0);
value = tegra_sor_readl(sor, sor->soc->regs->dp_padctl2);
value &= ~SOR_DP_PADCTL_SPAREPLL_MASK;
value |= SOR_DP_PADCTL_SPAREPLL(settings->sparepll);
tegra_sor_writel(sor, value, sor->soc->regs->dp_padctl2);
/* power down pad calibration */
value = tegra_sor_readl(sor, sor->soc->regs->dp_padctl0);
value |= SOR_DP_PADCTL_PAD_CAL_PD;
tegra_sor_writel(sor, value, sor->soc->regs->dp_padctl0);
if (!dc->soc->has_nvdisplay) {
/* miscellaneous display controller settings */
value = VSYNC_H_POSITION(1);
tegra_dc_writel(dc, value, DC_DISP_DISP_TIMING_OPTIONS);
}
value = tegra_dc_readl(dc, DC_DISP_DISP_COLOR_CONTROL);
value &= ~DITHER_CONTROL_MASK;
value &= ~BASE_COLOR_SIZE_MASK;
switch (state->bpc) {
case 6:
value |= BASE_COLOR_SIZE_666;
break;
case 8:
value |= BASE_COLOR_SIZE_888;
break;
case 10:
value |= BASE_COLOR_SIZE_101010;
break;
case 12:
value |= BASE_COLOR_SIZE_121212;
break;
default:
WARN(1, "%u bits-per-color not supported\n", state->bpc);
value |= BASE_COLOR_SIZE_888;
break;
}
tegra_dc_writel(dc, value, DC_DISP_DISP_COLOR_CONTROL);
/* XXX set display head owner */
value = tegra_sor_readl(sor, SOR_STATE1);
value &= ~SOR_STATE_ASY_OWNER_MASK;
value |= SOR_STATE_ASY_OWNER(1 + dc->pipe);
tegra_sor_writel(sor, value, SOR_STATE1);
err = tegra_sor_power_up(sor, 250);
if (err < 0)
dev_err(sor->dev, "failed to power up SOR: %d\n", err);
/* configure dynamic range of output */
value = tegra_sor_readl(sor, sor->soc->regs->head_state0 + dc->pipe);
value &= ~SOR_HEAD_STATE_RANGECOMPRESS_MASK;
value &= ~SOR_HEAD_STATE_DYNRANGE_MASK;
tegra_sor_writel(sor, value, sor->soc->regs->head_state0 + dc->pipe);
/* configure colorspace */
value = tegra_sor_readl(sor, sor->soc->regs->head_state0 + dc->pipe);
value &= ~SOR_HEAD_STATE_COLORSPACE_MASK;
value |= SOR_HEAD_STATE_COLORSPACE_RGB;
tegra_sor_writel(sor, value, sor->soc->regs->head_state0 + dc->pipe);
tegra_sor_mode_set(sor, mode, state);
tegra_sor_update(sor);
/* program preamble timing in SOR (XXX) */
value = tegra_sor_readl(sor, SOR_DP_SPARE0);
value &= ~SOR_DP_SPARE_DISP_VIDEO_PREAMBLE;
tegra_sor_writel(sor, value, SOR_DP_SPARE0);
err = tegra_sor_attach(sor);
if (err < 0)
dev_err(sor->dev, "failed to attach SOR: %d\n", err);
/* enable display to SOR clock and generate HDMI preamble */
value = tegra_dc_readl(dc, DC_DISP_DISP_WIN_OPTIONS);
if (!sor->soc->has_nvdisplay)
value |= SOR_ENABLE(1) | SOR1_TIMING_CYA;
else
value |= SOR_ENABLE(sor->index);
tegra_dc_writel(dc, value, DC_DISP_DISP_WIN_OPTIONS);
if (dc->soc->has_nvdisplay) {
value = tegra_dc_readl(dc, DC_DISP_CORE_SOR_SET_CONTROL(sor->index));
value &= ~PROTOCOL_MASK;
value |= PROTOCOL_SINGLE_TMDS_A;
tegra_dc_writel(dc, value, DC_DISP_CORE_SOR_SET_CONTROL(sor->index));
}
tegra_dc_commit(dc);
err = tegra_sor_wakeup(sor);
if (err < 0)
dev_err(sor->dev, "failed to wakeup SOR: %d\n", err);
tegra_sor_hdmi_scdc_start(sor);
tegra_sor_audio_prepare(sor);
}
static const struct drm_encoder_helper_funcs tegra_sor_hdmi_helpers = {
.disable = tegra_sor_hdmi_disable,
.enable = tegra_sor_hdmi_enable,
.atomic_check = tegra_sor_encoder_atomic_check,
};
static int tegra_sor_init(struct host1x_client *client)
{
struct drm_device *drm = dev_get_drvdata(client->parent);
const struct drm_encoder_helper_funcs *helpers = NULL;
struct tegra_sor *sor = host1x_client_to_sor(client);
int connector = DRM_MODE_CONNECTOR_Unknown;
int encoder = DRM_MODE_ENCODER_NONE;
u32 value;
int err;
if (!sor->aux) {
if (sor->soc->supports_hdmi) {
connector = DRM_MODE_CONNECTOR_HDMIA;
encoder = DRM_MODE_ENCODER_TMDS;
helpers = &tegra_sor_hdmi_helpers;
} else if (sor->soc->supports_lvds) {
connector = DRM_MODE_CONNECTOR_LVDS;
encoder = DRM_MODE_ENCODER_LVDS;
}
} else {
if (sor->soc->supports_edp) {
connector = DRM_MODE_CONNECTOR_eDP;
encoder = DRM_MODE_ENCODER_TMDS;
helpers = &tegra_sor_edp_helpers;
} else if (sor->soc->supports_dp) {
connector = DRM_MODE_CONNECTOR_DisplayPort;
encoder = DRM_MODE_ENCODER_TMDS;
}
}
sor->output.dev = sor->dev;
drm_connector_init(drm, &sor->output.connector,
&tegra_sor_connector_funcs,
connector);
drm_connector_helper_add(&sor->output.connector,
&tegra_sor_connector_helper_funcs);
sor->output.connector.dpms = DRM_MODE_DPMS_OFF;
drm_encoder_init(drm, &sor->output.encoder, &tegra_sor_encoder_funcs,
encoder, NULL);
drm_encoder_helper_add(&sor->output.encoder, helpers);
drm_connector_attach_encoder(&sor->output.connector,
&sor->output.encoder);
drm_connector_register(&sor->output.connector);
err = tegra_output_init(drm, &sor->output);
if (err < 0) {
dev_err(client->dev, "failed to initialize output: %d\n", err);
return err;
}
tegra_output_find_possible_crtcs(&sor->output, drm);
if (sor->aux) {
err = drm_dp_aux_attach(sor->aux, &sor->output);
if (err < 0) {
dev_err(sor->dev, "failed to attach DP: %d\n", err);
return err;
}
}
/*
* XXX: Remove this reset once proper hand-over from firmware to
* kernel is possible.
*/
if (sor->rst) {
err = reset_control_assert(sor->rst);
if (err < 0) {
dev_err(sor->dev, "failed to assert SOR reset: %d\n",
err);
return err;
}
}
err = clk_prepare_enable(sor->clk);
if (err < 0) {
dev_err(sor->dev, "failed to enable clock: %d\n", err);
return err;
}
usleep_range(1000, 3000);
if (sor->rst) {
err = reset_control_deassert(sor->rst);
if (err < 0) {
dev_err(sor->dev, "failed to deassert SOR reset: %d\n",
err);
return err;
}
}
err = clk_prepare_enable(sor->clk_safe);
if (err < 0)
return err;
err = clk_prepare_enable(sor->clk_dp);
if (err < 0)
return err;
/*
* Enable and unmask the HDA codec SCRATCH0 register interrupt. This
* is used for interoperability between the HDA codec driver and the
* HDMI/DP driver.
*/
value = SOR_INT_CODEC_SCRATCH1 | SOR_INT_CODEC_SCRATCH0;
tegra_sor_writel(sor, value, SOR_INT_ENABLE);
tegra_sor_writel(sor, value, SOR_INT_MASK);
return 0;
}
static int tegra_sor_exit(struct host1x_client *client)
{
struct tegra_sor *sor = host1x_client_to_sor(client);
int err;
tegra_sor_writel(sor, 0, SOR_INT_MASK);
tegra_sor_writel(sor, 0, SOR_INT_ENABLE);
tegra_output_exit(&sor->output);
if (sor->aux) {
err = drm_dp_aux_detach(sor->aux);
if (err < 0) {
dev_err(sor->dev, "failed to detach DP: %d\n", err);
return err;
}
}
clk_disable_unprepare(sor->clk_safe);
clk_disable_unprepare(sor->clk_dp);
clk_disable_unprepare(sor->clk);
return 0;
}
static const struct host1x_client_ops sor_client_ops = {
.init = tegra_sor_init,
.exit = tegra_sor_exit,
};
static const struct tegra_sor_ops tegra_sor_edp_ops = {
.name = "eDP",
};
static int tegra_sor_hdmi_probe(struct tegra_sor *sor)
{
int err;
sor->avdd_io_supply = devm_regulator_get(sor->dev, "avdd-io");
if (IS_ERR(sor->avdd_io_supply)) {
dev_err(sor->dev, "cannot get AVDD I/O supply: %ld\n",
PTR_ERR(sor->avdd_io_supply));
return PTR_ERR(sor->avdd_io_supply);
}
err = regulator_enable(sor->avdd_io_supply);
if (err < 0) {
dev_err(sor->dev, "failed to enable AVDD I/O supply: %d\n",
err);
return err;
}
sor->vdd_pll_supply = devm_regulator_get(sor->dev, "vdd-pll");
if (IS_ERR(sor->vdd_pll_supply)) {
dev_err(sor->dev, "cannot get VDD PLL supply: %ld\n",
PTR_ERR(sor->vdd_pll_supply));
return PTR_ERR(sor->vdd_pll_supply);
}
err = regulator_enable(sor->vdd_pll_supply);
if (err < 0) {
dev_err(sor->dev, "failed to enable VDD PLL supply: %d\n",
err);
return err;
}
sor->hdmi_supply = devm_regulator_get(sor->dev, "hdmi");
if (IS_ERR(sor->hdmi_supply)) {
dev_err(sor->dev, "cannot get HDMI supply: %ld\n",
PTR_ERR(sor->hdmi_supply));
return PTR_ERR(sor->hdmi_supply);
}
err = regulator_enable(sor->hdmi_supply);
if (err < 0) {
dev_err(sor->dev, "failed to enable HDMI supply: %d\n", err);
return err;
}
INIT_DELAYED_WORK(&sor->scdc, tegra_sor_hdmi_scdc_work);
return 0;
}
static int tegra_sor_hdmi_remove(struct tegra_sor *sor)
{
regulator_disable(sor->hdmi_supply);
regulator_disable(sor->vdd_pll_supply);
regulator_disable(sor->avdd_io_supply);
return 0;
}
static const struct tegra_sor_ops tegra_sor_hdmi_ops = {
.name = "HDMI",
.probe = tegra_sor_hdmi_probe,
.remove = tegra_sor_hdmi_remove,
};
static const u8 tegra124_sor_xbar_cfg[5] = {
0, 1, 2, 3, 4
};
static const struct tegra_sor_regs tegra124_sor_regs = {
.head_state0 = 0x05,
.head_state1 = 0x07,
.head_state2 = 0x09,
.head_state3 = 0x0b,
.head_state4 = 0x0d,
.head_state5 = 0x0f,
.pll0 = 0x17,
.pll1 = 0x18,
.pll2 = 0x19,
.pll3 = 0x1a,
.dp_padctl0 = 0x5c,
.dp_padctl2 = 0x73,
};
static const struct tegra_sor_soc tegra124_sor = {
.supports_edp = true,
.supports_lvds = true,
.supports_hdmi = false,
.supports_dp = false,
.regs = &tegra124_sor_regs,
.has_nvdisplay = false,
.xbar_cfg = tegra124_sor_xbar_cfg,
};
static const struct tegra_sor_regs tegra210_sor_regs = {
.head_state0 = 0x05,
.head_state1 = 0x07,
.head_state2 = 0x09,
.head_state3 = 0x0b,
.head_state4 = 0x0d,
.head_state5 = 0x0f,
.pll0 = 0x17,
.pll1 = 0x18,
.pll2 = 0x19,
.pll3 = 0x1a,
.dp_padctl0 = 0x5c,
.dp_padctl2 = 0x73,
};
static const struct tegra_sor_soc tegra210_sor = {
.supports_edp = true,
.supports_lvds = false,
.supports_hdmi = false,
.supports_dp = false,
.regs = &tegra210_sor_regs,
.has_nvdisplay = false,
.xbar_cfg = tegra124_sor_xbar_cfg,
};
static const u8 tegra210_sor_xbar_cfg[5] = {
2, 1, 0, 3, 4
};
static const struct tegra_sor_soc tegra210_sor1 = {
.supports_edp = false,
.supports_lvds = false,
.supports_hdmi = true,
.supports_dp = true,
.regs = &tegra210_sor_regs,
.has_nvdisplay = false,
.num_settings = ARRAY_SIZE(tegra210_sor_hdmi_defaults),
.settings = tegra210_sor_hdmi_defaults,
.xbar_cfg = tegra210_sor_xbar_cfg,
};
static const struct tegra_sor_regs tegra186_sor_regs = {
.head_state0 = 0x151,
.head_state1 = 0x154,
.head_state2 = 0x157,
.head_state3 = 0x15a,
.head_state4 = 0x15d,
.head_state5 = 0x160,
.pll0 = 0x163,
.pll1 = 0x164,
.pll2 = 0x165,
.pll3 = 0x166,
.dp_padctl0 = 0x168,
.dp_padctl2 = 0x16a,
};
static const struct tegra_sor_soc tegra186_sor = {
.supports_edp = false,
.supports_lvds = false,
.supports_hdmi = false,
.supports_dp = true,
.regs = &tegra186_sor_regs,
.has_nvdisplay = true,
.xbar_cfg = tegra124_sor_xbar_cfg,
};
static const struct tegra_sor_soc tegra186_sor1 = {
.supports_edp = false,
.supports_lvds = false,
.supports_hdmi = true,
.supports_dp = true,
.regs = &tegra186_sor_regs,
.has_nvdisplay = true,
.num_settings = ARRAY_SIZE(tegra186_sor_hdmi_defaults),
.settings = tegra186_sor_hdmi_defaults,
.xbar_cfg = tegra124_sor_xbar_cfg,
};
static const struct tegra_sor_regs tegra194_sor_regs = {
.head_state0 = 0x151,
.head_state1 = 0x155,
.head_state2 = 0x159,
.head_state3 = 0x15d,
.head_state4 = 0x161,
.head_state5 = 0x165,
.pll0 = 0x169,
.pll1 = 0x16a,
.pll2 = 0x16b,
.pll3 = 0x16c,
.dp_padctl0 = 0x16e,
.dp_padctl2 = 0x16f,
};
static const struct tegra_sor_soc tegra194_sor = {
.supports_edp = true,
.supports_lvds = false,
.supports_hdmi = true,
.supports_dp = true,
.regs = &tegra194_sor_regs,
.has_nvdisplay = true,
.num_settings = ARRAY_SIZE(tegra194_sor_hdmi_defaults),
.settings = tegra194_sor_hdmi_defaults,
.xbar_cfg = tegra210_sor_xbar_cfg,
};
static const struct of_device_id tegra_sor_of_match[] = {
{ .compatible = "nvidia,tegra194-sor", .data = &tegra194_sor },
{ .compatible = "nvidia,tegra186-sor1", .data = &tegra186_sor1 },
{ .compatible = "nvidia,tegra186-sor", .data = &tegra186_sor },
{ .compatible = "nvidia,tegra210-sor1", .data = &tegra210_sor1 },
{ .compatible = "nvidia,tegra210-sor", .data = &tegra210_sor },
{ .compatible = "nvidia,tegra124-sor", .data = &tegra124_sor },
{ },
};
MODULE_DEVICE_TABLE(of, tegra_sor_of_match);
static int tegra_sor_parse_dt(struct tegra_sor *sor)
{
struct device_node *np = sor->dev->of_node;
u32 value;
int err;
if (sor->soc->has_nvdisplay) {
err = of_property_read_u32(np, "nvidia,interface", &value);
if (err < 0)
return err;
sor->index = value;
/*
* override the default that we already set for Tegra210 and
* earlier
*/
sor->pad = TEGRA_IO_PAD_HDMI_DP0 + sor->index;
}
return 0;
}
static void tegra_hda_parse_format(unsigned int format, unsigned int *rate,
unsigned int *channels)
{
unsigned int mul, div;
if (format & AC_FMT_BASE_44K)
*rate = 44100;
else
*rate = 48000;
mul = (format & AC_FMT_MULT_MASK) >> AC_FMT_MULT_SHIFT;
div = (format & AC_FMT_DIV_MASK) >> AC_FMT_DIV_SHIFT;
*rate = *rate * (mul + 1) / (div + 1);
*channels = (format & AC_FMT_CHAN_MASK) >> AC_FMT_CHAN_SHIFT;
}
static irqreturn_t tegra_sor_irq(int irq, void *data)
{
struct tegra_sor *sor = data;
u32 value;
value = tegra_sor_readl(sor, SOR_INT_STATUS);
tegra_sor_writel(sor, value, SOR_INT_STATUS);
if (value & SOR_INT_CODEC_SCRATCH0) {
value = tegra_sor_readl(sor, SOR_AUDIO_HDA_CODEC_SCRATCH0);
if (value & SOR_AUDIO_HDA_CODEC_SCRATCH0_VALID) {
unsigned int format, sample_rate, channels;
format = value & SOR_AUDIO_HDA_CODEC_SCRATCH0_FMT_MASK;
tegra_hda_parse_format(format, &sample_rate, &channels);
sor->audio.sample_rate = sample_rate;
sor->audio.channels = channels;
tegra_sor_hdmi_audio_enable(sor);
} else {
tegra_sor_hdmi_audio_disable(sor);
}
}
return IRQ_HANDLED;
}
static int tegra_sor_probe(struct platform_device *pdev)
{
struct device_node *np;
struct tegra_sor *sor;
struct resource *regs;
int err;
sor = devm_kzalloc(&pdev->dev, sizeof(*sor), GFP_KERNEL);
if (!sor)
return -ENOMEM;
sor->soc = of_device_get_match_data(&pdev->dev);
sor->output.dev = sor->dev = &pdev->dev;
sor->settings = devm_kmemdup(&pdev->dev, sor->soc->settings,
sor->soc->num_settings *
sizeof(*sor->settings),
GFP_KERNEL);
if (!sor->settings)
return -ENOMEM;
sor->num_settings = sor->soc->num_settings;
np = of_parse_phandle(pdev->dev.of_node, "nvidia,dpaux", 0);
if (np) {
sor->aux = drm_dp_aux_find_by_of_node(np);
of_node_put(np);
if (!sor->aux)
return -EPROBE_DEFER;
}
if (!sor->aux) {
if (sor->soc->supports_hdmi) {
sor->ops = &tegra_sor_hdmi_ops;
sor->pad = TEGRA_IO_PAD_HDMI;
} else if (sor->soc->supports_lvds) {
dev_err(&pdev->dev, "LVDS not supported yet\n");
return -ENODEV;
} else {
dev_err(&pdev->dev, "unknown (non-DP) support\n");
return -ENODEV;
}
} else {
if (sor->soc->supports_edp) {
sor->ops = &tegra_sor_edp_ops;
sor->pad = TEGRA_IO_PAD_LVDS;
} else if (sor->soc->supports_dp) {
dev_err(&pdev->dev, "DisplayPort not supported yet\n");
return -ENODEV;
} else {
dev_err(&pdev->dev, "unknown (DP) support\n");
return -ENODEV;
}
}
err = tegra_sor_parse_dt(sor);
if (err < 0)
return err;
err = tegra_output_probe(&sor->output);
if (err < 0) {
dev_err(&pdev->dev, "failed to probe output: %d\n", err);
return err;
}
if (sor->ops && sor->ops->probe) {
err = sor->ops->probe(sor);
if (err < 0) {
dev_err(&pdev->dev, "failed to probe %s: %d\n",
sor->ops->name, err);
goto output;
}
}
regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
sor->regs = devm_ioremap_resource(&pdev->dev, regs);
if (IS_ERR(sor->regs)) {
err = PTR_ERR(sor->regs);
goto remove;
}
err = platform_get_irq(pdev, 0);
if (err < 0) {
dev_err(&pdev->dev, "failed to get IRQ: %d\n", err);
goto remove;
}
sor->irq = err;
err = devm_request_irq(sor->dev, sor->irq, tegra_sor_irq, 0,
dev_name(sor->dev), sor);
if (err < 0) {
dev_err(&pdev->dev, "failed to request IRQ: %d\n", err);
goto remove;
}
sor->rst = devm_reset_control_get(&pdev->dev, "sor");
if (IS_ERR(sor->rst)) {
err = PTR_ERR(sor->rst);
if (err != -EBUSY || WARN_ON(!pdev->dev.pm_domain)) {
dev_err(&pdev->dev, "failed to get reset control: %d\n",
err);
goto remove;
}
/*
* At this point, the reset control is most likely being used
* by the generic power domain implementation. With any luck
* the power domain will have taken care of resetting the SOR
* and we don't have to do anything.
*/
sor->rst = NULL;
}
sor->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(sor->clk)) {
err = PTR_ERR(sor->clk);
dev_err(&pdev->dev, "failed to get module clock: %d\n", err);
goto remove;
}
if (sor->soc->supports_hdmi || sor->soc->supports_dp) {
struct device_node *np = pdev->dev.of_node;
const char *name;
/*
* For backwards compatibility with Tegra210 device trees,
* fall back to the old clock name "source" if the new "out"
* clock is not available.
*/
if (of_property_match_string(np, "clock-names", "out") < 0)
name = "source";
else
name = "out";
sor->clk_out = devm_clk_get(&pdev->dev, name);
if (IS_ERR(sor->clk_out)) {
err = PTR_ERR(sor->clk_out);
dev_err(sor->dev, "failed to get %s clock: %d\n",
name, err);
goto remove;
}
} else {
/* fall back to the module clock on SOR0 (eDP/LVDS only) */
sor->clk_out = sor->clk;
}
sor->clk_parent = devm_clk_get(&pdev->dev, "parent");
if (IS_ERR(sor->clk_parent)) {
err = PTR_ERR(sor->clk_parent);
dev_err(&pdev->dev, "failed to get parent clock: %d\n", err);
goto remove;
}
sor->clk_safe = devm_clk_get(&pdev->dev, "safe");
if (IS_ERR(sor->clk_safe)) {
err = PTR_ERR(sor->clk_safe);
dev_err(&pdev->dev, "failed to get safe clock: %d\n", err);
goto remove;
}
sor->clk_dp = devm_clk_get(&pdev->dev, "dp");
if (IS_ERR(sor->clk_dp)) {
err = PTR_ERR(sor->clk_dp);
dev_err(&pdev->dev, "failed to get DP clock: %d\n", err);
goto remove;
}
/*
* Starting with Tegra186, the BPMP provides an implementation for
* the pad output clock, so we have to look it up from device tree.
*/
sor->clk_pad = devm_clk_get(&pdev->dev, "pad");
if (IS_ERR(sor->clk_pad)) {
if (sor->clk_pad != ERR_PTR(-ENOENT)) {
err = PTR_ERR(sor->clk_pad);
goto remove;
}
/*
* If the pad output clock is not available, then we assume
* we're on Tegra210 or earlier and have to provide our own
* implementation.
*/
sor->clk_pad = NULL;
}
/*
* The bootloader may have set up the SOR such that it's module clock
* is sourced by one of the display PLLs. However, that doesn't work
* without properly having set up other bits of the SOR.
*/
err = clk_set_parent(sor->clk_out, sor->clk_safe);
if (err < 0) {
dev_err(&pdev->dev, "failed to use safe clock: %d\n", err);
goto remove;
}
platform_set_drvdata(pdev, sor);
pm_runtime_enable(&pdev->dev);
/*
* On Tegra210 and earlier, provide our own implementation for the
* pad output clock.
*/
if (!sor->clk_pad) {
err = pm_runtime_get_sync(&pdev->dev);
if (err < 0) {
dev_err(&pdev->dev, "failed to get runtime PM: %d\n",
err);
goto remove;
}
sor->clk_pad = tegra_clk_sor_pad_register(sor,
"sor1_pad_clkout");
pm_runtime_put(&pdev->dev);
}
if (IS_ERR(sor->clk_pad)) {
err = PTR_ERR(sor->clk_pad);
dev_err(&pdev->dev, "failed to register SOR pad clock: %d\n",
err);
goto remove;
}
INIT_LIST_HEAD(&sor->client.list);
sor->client.ops = &sor_client_ops;
sor->client.dev = &pdev->dev;
err = host1x_client_register(&sor->client);
if (err < 0) {
dev_err(&pdev->dev, "failed to register host1x client: %d\n",
err);
goto remove;
}
return 0;
remove:
if (sor->ops && sor->ops->remove)
sor->ops->remove(sor);
output:
tegra_output_remove(&sor->output);
return err;
}
static int tegra_sor_remove(struct platform_device *pdev)
{
struct tegra_sor *sor = platform_get_drvdata(pdev);
int err;
pm_runtime_disable(&pdev->dev);
err = host1x_client_unregister(&sor->client);
if (err < 0) {
dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
err);
return err;
}
if (sor->ops && sor->ops->remove) {
err = sor->ops->remove(sor);
if (err < 0)
dev_err(&pdev->dev, "failed to remove SOR: %d\n", err);
}
tegra_output_remove(&sor->output);
return 0;
}
#ifdef CONFIG_PM
static int tegra_sor_suspend(struct device *dev)
{
struct tegra_sor *sor = dev_get_drvdata(dev);
int err;
if (sor->rst) {
err = reset_control_assert(sor->rst);
if (err < 0) {
dev_err(dev, "failed to assert reset: %d\n", err);
return err;
}
}
usleep_range(1000, 2000);
clk_disable_unprepare(sor->clk);
return 0;
}
static int tegra_sor_resume(struct device *dev)
{
struct tegra_sor *sor = dev_get_drvdata(dev);
int err;
err = clk_prepare_enable(sor->clk);
if (err < 0) {
dev_err(dev, "failed to enable clock: %d\n", err);
return err;
}
usleep_range(1000, 2000);
if (sor->rst) {
err = reset_control_deassert(sor->rst);
if (err < 0) {
dev_err(dev, "failed to deassert reset: %d\n", err);
clk_disable_unprepare(sor->clk);
return err;
}
}
return 0;
}
#endif
static const struct dev_pm_ops tegra_sor_pm_ops = {
SET_RUNTIME_PM_OPS(tegra_sor_suspend, tegra_sor_resume, NULL)
};
struct platform_driver tegra_sor_driver = {
.driver = {
.name = "tegra-sor",
.of_match_table = tegra_sor_of_match,
.pm = &tegra_sor_pm_ops,
},
.probe = tegra_sor_probe,
.remove = tegra_sor_remove,
};
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