/*
* 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/debugfs.h>
#include <linux/gpio.h>
#include <linux/io.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/regulator/consumer.h>
#include <linux/reset.h>
#include <soc/tegra/pmc.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_dp_helper.h>
#include <drm/drm_panel.h>
#include "dc.h"
#include "drm.h"
#include "sor.h"
#define SOR_REKEY 0x38
struct tegra_sor_hdmi_settings {
unsigned long frequency;
u8 vcocap;
u8 ichpmp;
u8 loadadj;
u8 termadj;
u8 tx_pu;
u8 bg_vref;
u8 drive_current[4];
u8 preemphasis[4];
};
#if 1
static const struct tegra_sor_hdmi_settings tegra210_sor_hdmi_defaults[] = {
{
.frequency = 54000000,
.vcocap = 0x0,
.ichpmp = 0x1,
.loadadj = 0x3,
.termadj = 0x9,
.tx_pu = 0x10,
.bg_vref = 0x8,
.drive_current = { 0x33, 0x3a, 0x3a, 0x3a },
.preemphasis = { 0x00, 0x00, 0x00, 0x00 },
}, {
.frequency = 75000000,
.vcocap = 0x3,
.ichpmp = 0x1,
.loadadj = 0x3,
.termadj = 0x9,
.tx_pu = 0x40,
.bg_vref = 0x8,
.drive_current = { 0x33, 0x3a, 0x3a, 0x3a },
.preemphasis = { 0x00, 0x00, 0x00, 0x00 },
}, {
.frequency = 150000000,
.vcocap = 0x3,
.ichpmp = 0x1,
.loadadj = 0x3,
.termadj = 0x9,
.tx_pu = 0x66,
.bg_vref = 0x8,
.drive_current = { 0x33, 0x3a, 0x3a, 0x3a },
.preemphasis = { 0x00, 0x00, 0x00, 0x00 },
}, {
.frequency = 300000000,
.vcocap = 0x3,
.ichpmp = 0x1,
.loadadj = 0x3,
.termadj = 0x9,
.tx_pu = 0x66,
.bg_vref = 0xa,
.drive_current = { 0x33, 0x3f, 0x3f, 0x3f },
.preemphasis = { 0x00, 0x17, 0x17, 0x17 },
}, {
.frequency = 600000000,
.vcocap = 0x3,
.ichpmp = 0x1,
.loadadj = 0x3,
.termadj = 0x9,
.tx_pu = 0x66,
.bg_vref = 0x8,
.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,
.ichpmp = 0x1,
.loadadj = 0x3,
.termadj = 0x9,
.tx_pu = 0x40,
.bg_vref = 0x8,
.drive_current = { 0x29, 0x29, 0x29, 0x29 },
.preemphasis = { 0x00, 0x00, 0x00, 0x00 },
}, {
.frequency = 150000000,
.vcocap = 0x3,
.ichpmp = 0x1,
.loadadj = 0x3,
.termadj = 0x9,
.tx_pu = 0x66,
.bg_vref = 0x8,
.drive_current = { 0x30, 0x37, 0x37, 0x37 },
.preemphasis = { 0x01, 0x02, 0x02, 0x02 },
}, {
.frequency = 300000000,
.vcocap = 0x3,
.ichpmp = 0x6,
.loadadj = 0x3,
.termadj = 0x9,
.tx_pu = 0x66,
.bg_vref = 0xf,
.drive_current = { 0x30, 0x37, 0x37, 0x37 },
.preemphasis = { 0x10, 0x3e, 0x3e, 0x3e },
}, {
.frequency = 600000000,
.vcocap = 0x3,
.ichpmp = 0xa,
.loadadj = 0x3,
.termadj = 0xb,
.tx_pu = 0x66,
.bg_vref = 0xe,
.drive_current = { 0x35, 0x3e, 0x3e, 0x3e },
.preemphasis = { 0x02, 0x3f, 0x3f, 0x3f },
},
};
#endif
struct tegra_sor_soc {
bool supports_edp;
bool supports_lvds;
bool supports_hdmi;
bool supports_dp;
const struct tegra_sor_hdmi_settings *settings;
unsigned int num_settings;
};
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;
struct reset_control *rst;
struct clk *clk_parent;
struct clk *clk_safe;
struct clk *clk_dp;
struct clk *clk;
struct drm_dp_aux *aux;
struct drm_info_list *debugfs_files;
struct drm_minor *minor;
struct dentry *debugfs;
const struct tegra_sor_ops *ops;
/* 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 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 long offset)
{
return readl(sor->regs + (offset << 2));
}
static inline void tegra_sor_writel(struct tegra_sor *sor, u32 value,
unsigned long offset)
{
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, parent);
if (err < 0)
return err;
err = clk_prepare_enable(sor->clk);
if (err < 0)
return err;
return 0;
}
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_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_DP_PADCTL0);
value = tegra_sor_readl(sor, SOR_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_DP_PADCTL0);
usleep_range(10, 100);
value = tegra_sor_readl(sor, SOR_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_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_dp_term_calibrate(struct tegra_sor *sor)
{
u32 mask = 0x08, adj = 0, value;
/* enable pad calibration logic */
value = tegra_sor_readl(sor, SOR_DP_PADCTL0);
value &= ~SOR_DP_PADCTL_PAD_CAL_PD;
tegra_sor_writel(sor, value, SOR_DP_PADCTL0);
value = tegra_sor_readl(sor, SOR_PLL1);
value |= SOR_PLL1_TMDS_TERM;
tegra_sor_writel(sor, value, SOR_PLL1);
while (mask) {
adj |= mask;
value = tegra_sor_readl(sor, SOR_PLL1);
value &= ~SOR_PLL1_TMDS_TERMADJ_MASK;
value |= SOR_PLL1_TMDS_TERMADJ(adj);
tegra_sor_writel(sor, value, SOR_PLL1);
usleep_range(100, 200);
value = tegra_sor_readl(sor, SOR_PLL1);
if (value & SOR_PLL1_TERM_COMPOUT)
adj &= ~mask;
mask >>= 1;
}
value = tegra_sor_readl(sor, SOR_PLL1);
value &= ~SOR_PLL1_TMDS_TERMADJ_MASK;
value |= SOR_PLL1_TMDS_TERMADJ(adj);
tegra_sor_writel(sor, value, SOR_PLL1);
/* disable pad calibration logic */
value = tegra_sor_readl(sor, SOR_DP_PADCTL0);
value |= SOR_DP_PADCTL_PAD_CAL_PD;
tegra_sor_writel(sor, value, SOR_DP_PADCTL0);
}
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(¶ms, 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, ¶ms, 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 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);
value = tegra_sor_readl(sor, SOR_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_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_PLL2);
value |= SOR_PLL2_PORT_POWERDOWN;
tegra_sor_writel(sor, value, SOR_PLL2);
usleep_range(20, 100);
value = tegra_sor_readl(sor, SOR_PLL0);
value |= SOR_PLL0_VCOPD | SOR_PLL0_PWR;
tegra_sor_writel(sor, value, SOR_PLL0);
value = tegra_sor_readl(sor, SOR_PLL2);
value |= SOR_PLL2_SEQ_PLLCAPPD;
value |= SOR_PLL2_SEQ_PLLCAPPD_ENFORCE;
tegra_sor_writel(sor, value, SOR_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;
}
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;
int err = 0;
drm_modeset_lock_all(drm);
if (!crtc || !crtc->state->active) {
err = -EBUSY;
goto unlock;
}
#define DUMP_REG(name) \
seq_printf(s, "%-38s %#05x %08x\n", #name, name, \
tegra_sor_readl(sor, name))
DUMP_REG(SOR_CTXSW);
DUMP_REG(SOR_SUPER_STATE0);
DUMP_REG(SOR_SUPER_STATE1);
DUMP_REG(SOR_STATE0);
DUMP_REG(SOR_STATE1);
DUMP_REG(SOR_HEAD_STATE0(0));
DUMP_REG(SOR_HEAD_STATE0(1));
DUMP_REG(SOR_HEAD_STATE1(0));
DUMP_REG(SOR_HEAD_STATE1(1));
DUMP_REG(SOR_HEAD_STATE2(0));
DUMP_REG(SOR_HEAD_STATE2(1));
DUMP_REG(SOR_HEAD_STATE3(0));
DUMP_REG(SOR_HEAD_STATE3(1));
DUMP_REG(SOR_HEAD_STATE4(0));
DUMP_REG(SOR_HEAD_STATE4(1));
DUMP_REG(SOR_HEAD_STATE5(0));
DUMP_REG(SOR_HEAD_STATE5(1));
DUMP_REG(SOR_CRC_CNTRL);
DUMP_REG(SOR_DP_DEBUG_MVID);
DUMP_REG(SOR_CLK_CNTRL);
DUMP_REG(SOR_CAP);
DUMP_REG(SOR_PWR);
DUMP_REG(SOR_TEST);
DUMP_REG(SOR_PLL0);
DUMP_REG(SOR_PLL1);
DUMP_REG(SOR_PLL2);
DUMP_REG(SOR_PLL3);
DUMP_REG(SOR_CSTM);
DUMP_REG(SOR_LVDS);
DUMP_REG(SOR_CRCA);
DUMP_REG(SOR_CRCB);
DUMP_REG(SOR_BLANK);
DUMP_REG(SOR_SEQ_CTL);
DUMP_REG(SOR_LANE_SEQ_CTL);
DUMP_REG(SOR_SEQ_INST(0));
DUMP_REG(SOR_SEQ_INST(1));
DUMP_REG(SOR_SEQ_INST(2));
DUMP_REG(SOR_SEQ_INST(3));
DUMP_REG(SOR_SEQ_INST(4));
DUMP_REG(SOR_SEQ_INST(5));
DUMP_REG(SOR_SEQ_INST(6));
DUMP_REG(SOR_SEQ_INST(7));
DUMP_REG(SOR_SEQ_INST(8));
DUMP_REG(SOR_SEQ_INST(9));
DUMP_REG(SOR_SEQ_INST(10));
DUMP_REG(SOR_SEQ_INST(11));
DUMP_REG(SOR_SEQ_INST(12));
DUMP_REG(SOR_SEQ_INST(13));
DUMP_REG(SOR_SEQ_INST(14));
DUMP_REG(SOR_SEQ_INST(15));
DUMP_REG(SOR_PWM_DIV);
DUMP_REG(SOR_PWM_CTL);
DUMP_REG(SOR_VCRC_A0);
DUMP_REG(SOR_VCRC_A1);
DUMP_REG(SOR_VCRC_B0);
DUMP_REG(SOR_VCRC_B1);
DUMP_REG(SOR_CCRC_A0);
DUMP_REG(SOR_CCRC_A1);
DUMP_REG(SOR_CCRC_B0);
DUMP_REG(SOR_CCRC_B1);
DUMP_REG(SOR_EDATA_A0);
DUMP_REG(SOR_EDATA_A1);
DUMP_REG(SOR_EDATA_B0);
DUMP_REG(SOR_EDATA_B1);
DUMP_REG(SOR_COUNT_A0);
DUMP_REG(SOR_COUNT_A1);
DUMP_REG(SOR_COUNT_B0);
DUMP_REG(SOR_COUNT_B1);
DUMP_REG(SOR_DEBUG_A0);
DUMP_REG(SOR_DEBUG_A1);
DUMP_REG(SOR_DEBUG_B0);
DUMP_REG(SOR_DEBUG_B1);
DUMP_REG(SOR_TRIG);
DUMP_REG(SOR_MSCHECK);
DUMP_REG(SOR_XBAR_CTRL);
DUMP_REG(SOR_XBAR_POL);
DUMP_REG(SOR_DP_LINKCTL0);
DUMP_REG(SOR_DP_LINKCTL1);
DUMP_REG(SOR_LANE_DRIVE_CURRENT0);
DUMP_REG(SOR_LANE_DRIVE_CURRENT1);
DUMP_REG(SOR_LANE4_DRIVE_CURRENT0);
DUMP_REG(SOR_LANE4_DRIVE_CURRENT1);
DUMP_REG(SOR_LANE_PREEMPHASIS0);
DUMP_REG(SOR_LANE_PREEMPHASIS1);
DUMP_REG(SOR_LANE4_PREEMPHASIS0);
DUMP_REG(SOR_LANE4_PREEMPHASIS1);
DUMP_REG(SOR_LANE_POSTCURSOR0);
DUMP_REG(SOR_LANE_POSTCURSOR1);
DUMP_REG(SOR_DP_CONFIG0);
DUMP_REG(SOR_DP_CONFIG1);
DUMP_REG(SOR_DP_MN0);
DUMP_REG(SOR_DP_MN1);
DUMP_REG(SOR_DP_PADCTL0);
DUMP_REG(SOR_DP_PADCTL1);
DUMP_REG(SOR_DP_DEBUG0);
DUMP_REG(SOR_DP_DEBUG1);
DUMP_REG(SOR_DP_SPARE0);
DUMP_REG(SOR_DP_SPARE1);
DUMP_REG(SOR_DP_AUDIO_CTRL);
DUMP_REG(SOR_DP_AUDIO_HBLANK_SYMBOLS);
DUMP_REG(SOR_DP_AUDIO_VBLANK_SYMBOLS);
DUMP_REG(SOR_DP_GENERIC_INFOFRAME_HEADER);
DUMP_REG(SOR_DP_GENERIC_INFOFRAME_SUBPACK0);
DUMP_REG(SOR_DP_GENERIC_INFOFRAME_SUBPACK1);
DUMP_REG(SOR_DP_GENERIC_INFOFRAME_SUBPACK2);
DUMP_REG(SOR_DP_GENERIC_INFOFRAME_SUBPACK3);
DUMP_REG(SOR_DP_GENERIC_INFOFRAME_SUBPACK4);
DUMP_REG(SOR_DP_GENERIC_INFOFRAME_SUBPACK5);
DUMP_REG(SOR_DP_GENERIC_INFOFRAME_SUBPACK6);
DUMP_REG(SOR_DP_TPG);
DUMP_REG(SOR_DP_TPG_CONFIG);
DUMP_REG(SOR_DP_LQ_CSTM0);
DUMP_REG(SOR_DP_LQ_CSTM1);
DUMP_REG(SOR_DP_LQ_CSTM2);
#undef DUMP_REG
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_debugfs_init(struct tegra_sor *sor,
struct drm_minor *minor)
{
const char *name = sor->soc->supports_dp ? "sor1" : "sor";
unsigned int i;
int err;
sor->debugfs = debugfs_create_dir(name, minor->debugfs_root);
if (!sor->debugfs)
return -ENOMEM;
sor->debugfs_files = kmemdup(debugfs_files, sizeof(debugfs_files),
GFP_KERNEL);
if (!sor->debugfs_files) {
err = -ENOMEM;
goto remove;
}
for (i = 0; i < ARRAY_SIZE(debugfs_files); i++)
sor->debugfs_files[i].data = sor;
err = drm_debugfs_create_files(sor->debugfs_files,
ARRAY_SIZE(debugfs_files),
sor->debugfs, minor);
if (err < 0)
goto free;
sor->minor = minor;
return 0;
free:
kfree(sor->debugfs_files);
sor->debugfs_files = NULL;
remove:
debugfs_remove_recursive(sor->debugfs);
sor->debugfs = NULL;
return err;
}
static void tegra_sor_debugfs_exit(struct tegra_sor *sor)
{
drm_debugfs_remove_files(sor->debugfs_files, ARRAY_SIZE(debugfs_files),
sor->minor);
sor->minor = NULL;
kfree(sor->debugfs_files);
sor->debugfs_files = NULL;
debugfs_remove_recursive(sor->debugfs);
sor->debugfs = NULL;
}
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 const struct drm_connector_funcs tegra_sor_connector_funcs = {
.dpms = drm_atomic_helper_connector_dpms,
.reset = drm_atomic_helper_connector_reset,
.detect = tegra_sor_connector_detect,
.fill_modes = drm_helper_probe_single_connector_modes,
.destroy = tegra_output_connector_destroy,
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};
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,
.best_encoder = tegra_output_connector_best_encoder,
};
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;
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_rail_power_off(TEGRA_IO_RAIL_LVDS);
if (err < 0)
dev_err(sor->dev, "failed to power off I/O rail: %d\n", err);
if (output->panel)
drm_panel_unprepare(output->panel);
reset_control_assert(sor->rst);
clk_disable_unprepare(sor->clk);
}
#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);
unsigned int vbe, vse, hbe, hse, vbs, hbs, i;
struct tegra_sor *sor = to_sor(output);
struct tegra_sor_config config;
struct drm_dp_link link;
u8 rate, lanes;
int err = 0;
u32 value;
err = clk_prepare_enable(sor->clk);
if (err < 0)
dev_err(sor->dev, "failed to enable clock: %d\n", err);
reset_control_deassert(sor->rst);
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 = output->connector.display_info.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_PLL2);
value &= ~SOR_PLL2_BANDGAP_POWERDOWN;
tegra_sor_writel(sor, value, SOR_PLL2);
usleep_range(20, 100);
value = tegra_sor_readl(sor, SOR_PLL3);
value |= SOR_PLL3_PLL_VDD_MODE_3V3;
tegra_sor_writel(sor, value, SOR_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_PLL0);
value = tegra_sor_readl(sor, SOR_PLL2);
value |= SOR_PLL2_SEQ_PLLCAPPD;
value &= ~SOR_PLL2_SEQ_PLLCAPPD_ENFORCE;
value |= SOR_PLL2_LVDS_ENABLE;
tegra_sor_writel(sor, value, SOR_PLL2);
value = SOR_PLL1_TERM_COMPOUT | SOR_PLL1_TMDS_TERM;
tegra_sor_writel(sor, value, SOR_PLL1);
while (true) {
value = tegra_sor_readl(sor, SOR_PLL2);
if ((value & SOR_PLL2_SEQ_PLLCAPPD_ENFORCE) == 0)
break;
usleep_range(250, 1000);
}
value = tegra_sor_readl(sor, SOR_PLL2);
value &= ~SOR_PLL2_POWERDOWN_OVERRIDE;
value &= ~SOR_PLL2_PORT_POWERDOWN;
tegra_sor_writel(sor, value, SOR_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_PLL2);
value |= SOR_PLL2_SEQ_PLLCAPPD_ENFORCE | SOR_PLL2_PORT_POWERDOWN |
SOR_PLL2_BANDGAP_POWERDOWN;
tegra_sor_writel(sor, value, SOR_PLL2);
value = tegra_sor_readl(sor, SOR_PLL0);
value |= SOR_PLL0_VCOPD | SOR_PLL0_PWR;
tegra_sor_writel(sor, value, SOR_PLL0);
value = tegra_sor_readl(sor, SOR_DP_PADCTL0);
value &= ~SOR_DP_PADCTL_PAD_CAL_PD;
tegra_sor_writel(sor, value, SOR_DP_PADCTL0);
/* step 2 */
err = tegra_io_rail_power_on(TEGRA_IO_RAIL_LVDS);
if (err < 0)
dev_err(sor->dev, "failed to power on I/O rail: %d\n", err);
usleep_range(5, 100);
/* step 3 */
value = tegra_sor_readl(sor, SOR_PLL2);
value &= ~SOR_PLL2_BANDGAP_POWERDOWN;
tegra_sor_writel(sor, value, SOR_PLL2);
usleep_range(20, 100);
/* step 4 */
value = tegra_sor_readl(sor, SOR_PLL0);
value &= ~SOR_PLL0_VCOPD;
value &= ~SOR_PLL0_PWR;
tegra_sor_writel(sor, value, SOR_PLL0);
value = tegra_sor_readl(sor, SOR_PLL2);
value &= ~SOR_PLL2_SEQ_PLLCAPPD_ENFORCE;
tegra_sor_writel(sor, value, SOR_PLL2);
usleep_range(200, 1000);
/* step 5 */
value = tegra_sor_readl(sor, SOR_PLL2);
value &= ~SOR_PLL2_PORT_POWERDOWN;
tegra_sor_writel(sor, value, SOR_PLL2);
/* 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_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_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);
/* set linkctl */
value = tegra_sor_readl(sor, SOR_DP_LINKCTL0);
value |= SOR_DP_LINKCTL_ENABLE;
value &= ~SOR_DP_LINKCTL_TU_SIZE_MASK;
value |= SOR_DP_LINKCTL_TU_SIZE(config.tu_size);
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);
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);
/* enable pad calibration logic */
value = tegra_sor_readl(sor, SOR_DP_PADCTL0);
value |= SOR_DP_PADCTL_PAD_CAL_PD;
tegra_sor_writel(sor, value, SOR_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);
/*
* configure panel (24bpp, vsync-, hsync-, DP-A protocol, complete
* raster, associate with display controller)
*/
value = SOR_STATE_ASY_PROTOCOL_DP_A |
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 (config.bits_per_pixel) {
case 24:
value |= SOR_STATE_ASY_PIXELDEPTH_BPP_24_444;
break;
case 18:
value |= SOR_STATE_ASY_PIXELDEPTH_BPP_18_444;
break;
default:
BUG();
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_HEAD_STATE1(dc->pipe));
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_HEAD_STATE2(dc->pipe));
vbe = vse + (mode->vsync_start - mode->vdisplay);
hbe = hse + (mode->hsync_start - mode->hdisplay);
value = ((vbe & 0x7fff) << 16) | (hbe & 0x7fff);
tegra_sor_writel(sor, value, SOR_HEAD_STATE3(dc->pipe));
vbs = vbe + mode->vdisplay;
hbs = hbe + mode->hdisplay;
value = ((vbs & 0x7fff) << 16) | (hbs & 0x7fff);
tegra_sor_writel(sor, value, SOR_HEAD_STATE4(dc->pipe));
tegra_sor_writel(sor, 0x1, SOR_HEAD_STATE5(dc->pipe));
/* 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);
/* 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;
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_dc *dc = to_tegra_dc(conn_state->crtc);
unsigned long pclk = crtc_state->mode.clock * 1000;
struct tegra_sor *sor = to_sor(output);
int err;
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;
}
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);
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_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 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(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;
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);
value &= ~SOR1_TIMING_CYA;
value &= ~SOR1_ENABLE;
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_rail_power_off(TEGRA_IO_RAIL_HDMI);
if (err < 0)
dev_err(sor->dev, "failed to power off HDMI rail: %d\n", err);
reset_control_assert(sor->rst);
usleep_range(1000, 2000);
clk_disable_unprepare(sor->clk);
}
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);
unsigned int vbe, vse, hbe, hse, vbs, hbs, div;
struct tegra_sor_hdmi_settings *settings;
struct tegra_sor *sor = to_sor(output);
struct drm_display_mode *mode;
struct drm_display_info *info;
u32 value;
int err;
mode = &encoder->crtc->state->adjusted_mode;
info = &output->connector.display_info;
err = clk_prepare_enable(sor->clk);
if (err < 0)
dev_err(sor->dev, "failed to enable clock: %d\n", err);
usleep_range(1000, 2000);
reset_control_deassert(sor->rst);
/* 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);
div = clk_get_rate(sor->clk) / 1000000 * 4;
err = tegra_io_rail_power_on(TEGRA_IO_RAIL_HDMI);
if (err < 0)
dev_err(sor->dev, "failed to power on HDMI rail: %d\n", err);
usleep_range(20, 100);
value = tegra_sor_readl(sor, SOR_PLL2);
value &= ~SOR_PLL2_BANDGAP_POWERDOWN;
tegra_sor_writel(sor, value, SOR_PLL2);
usleep_range(20, 100);
value = tegra_sor_readl(sor, SOR_PLL3);
value &= ~SOR_PLL3_PLL_VDD_MODE_3V3;
tegra_sor_writel(sor, value, SOR_PLL3);
value = tegra_sor_readl(sor, SOR_PLL0);
value &= ~SOR_PLL0_VCOPD;
value &= ~SOR_PLL0_PWR;
tegra_sor_writel(sor, value, SOR_PLL0);
value = tegra_sor_readl(sor, SOR_PLL2);
value &= ~SOR_PLL2_SEQ_PLLCAPPD_ENFORCE;
tegra_sor_writel(sor, value, SOR_PLL2);
usleep_range(200, 400);
value = tegra_sor_readl(sor, SOR_PLL2);
value &= ~SOR_PLL2_POWERDOWN_OVERRIDE;
value &= ~SOR_PLL2_PORT_POWERDOWN;
tegra_sor_writel(sor, value, SOR_PLL2);
usleep_range(20, 100);
value = tegra_sor_readl(sor, SOR_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_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)
value |= SOR_CLK_CNTRL_DP_LINK_SPEED_G2_70;
else
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);
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;
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));
/* program the reference clock */
value = SOR_REFCLK_DIV_INT(div) | SOR_REFCLK_DIV_FRAC(div);
tegra_sor_writel(sor, value, SOR_REFCLK);
/* XXX don't hardcode */
value = SOR_XBAR_CTRL_LINK1_XSEL(4, 4) |
SOR_XBAR_CTRL_LINK1_XSEL(3, 3) |
SOR_XBAR_CTRL_LINK1_XSEL(2, 2) |
SOR_XBAR_CTRL_LINK1_XSEL(1, 1) |
SOR_XBAR_CTRL_LINK1_XSEL(0, 0) |
SOR_XBAR_CTRL_LINK0_XSEL(4, 4) |
SOR_XBAR_CTRL_LINK0_XSEL(3, 3) |
SOR_XBAR_CTRL_LINK0_XSEL(2, 0) |
SOR_XBAR_CTRL_LINK0_XSEL(1, 1) |
SOR_XBAR_CTRL_LINK0_XSEL(0, 2);
tegra_sor_writel(sor, value, SOR_XBAR_CTRL);
tegra_sor_writel(sor, 0x00000000, SOR_XBAR_POL);
/* switch to parent clock */
err = tegra_sor_set_parent_clock(sor, sor->clk_parent);
if (err < 0)
dev_err(sor->dev, "failed to set parent clock: %d\n", err);
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);
/* 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_DP_PADCTL0);
value &= ~SOR_DP_PADCTL_PAD_CAL_PD;
tegra_sor_writel(sor, value, SOR_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_PLL0);
value &= ~SOR_PLL0_ICHPMP_MASK;
value &= ~SOR_PLL0_VCOCAP_MASK;
value |= SOR_PLL0_ICHPMP(settings->ichpmp);
value |= SOR_PLL0_VCOCAP(settings->vcocap);
tegra_sor_writel(sor, value, SOR_PLL0);
tegra_sor_dp_term_calibrate(sor);
value = tegra_sor_readl(sor, SOR_PLL1);
value &= ~SOR_PLL1_LOADADJ_MASK;
value |= SOR_PLL1_LOADADJ(settings->loadadj);
tegra_sor_writel(sor, value, SOR_PLL1);
value = tegra_sor_readl(sor, SOR_PLL3);
value &= ~SOR_PLL3_BG_VREF_LEVEL_MASK;
value |= SOR_PLL3_BG_VREF_LEVEL(settings->bg_vref);
tegra_sor_writel(sor, value, SOR_PLL3);
value = settings->drive_current[0] << 24 |
settings->drive_current[1] << 16 |
settings->drive_current[2] << 8 |
settings->drive_current[3] << 0;
tegra_sor_writel(sor, value, SOR_LANE_DRIVE_CURRENT0);
value = settings->preemphasis[0] << 24 |
settings->preemphasis[1] << 16 |
settings->preemphasis[2] << 8 |
settings->preemphasis[3] << 0;
tegra_sor_writel(sor, value, SOR_LANE_PREEMPHASIS0);
value = tegra_sor_readl(sor, SOR_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);
tegra_sor_writel(sor, value, SOR_DP_PADCTL0);
/* power down pad calibration */
value = tegra_sor_readl(sor, SOR_DP_PADCTL0);
value |= SOR_DP_PADCTL_PAD_CAL_PD;
tegra_sor_writel(sor, value, SOR_DP_PADCTL0);
/* 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 (info->bpc) {
case 6:
value |= BASE_COLOR_SIZE_666;
break;
case 8:
value |= BASE_COLOR_SIZE_888;
break;
default:
WARN(1, "%u bits-per-color not supported\n", info->bpc);
break;
}
tegra_dc_writel(dc, value, DC_DISP_DISP_COLOR_CONTROL);
err = tegra_sor_power_up(sor, 250);
if (err < 0)
dev_err(sor->dev, "failed to power up SOR: %d\n", err);
/* configure mode */
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 (info->bpc) {
case 8:
value |= SOR_STATE_ASY_PIXELDEPTH_BPP_24_444;
break;
case 6:
value |= SOR_STATE_ASY_PIXELDEPTH_BPP_18_444;
break;
default:
BUG();
break;
}
tegra_sor_writel(sor, value, SOR_STATE1);
value = tegra_sor_readl(sor, SOR_HEAD_STATE0(dc->pipe));
value &= ~SOR_HEAD_STATE_RANGECOMPRESS_MASK;
value &= ~SOR_HEAD_STATE_DYNRANGE_MASK;
tegra_sor_writel(sor, value, SOR_HEAD_STATE0(dc->pipe));
value = tegra_sor_readl(sor, SOR_HEAD_STATE0(dc->pipe));
value &= ~SOR_HEAD_STATE_COLORSPACE_MASK;
value |= SOR_HEAD_STATE_COLORSPACE_RGB;
tegra_sor_writel(sor, value, SOR_HEAD_STATE0(dc->pipe));
/*
* 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_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_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_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_HEAD_STATE4(dc->pipe));
tegra_sor_writel(sor, 0x1, SOR_HEAD_STATE5(dc->pipe));
tegra_sor_update(sor);
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);
value |= SOR1_ENABLE | SOR1_TIMING_CYA;
tegra_dc_writel(dc, value, DC_DISP_DISP_WIN_OPTIONS);
tegra_dc_commit(dc);
err = tegra_sor_wakeup(sor);
if (err < 0)
dev_err(sor->dev, "failed to wakeup SOR: %d\n", err);
}
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;
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_mode_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;
}
sor->output.encoder.possible_crtcs = 0x3;
if (IS_ENABLED(CONFIG_DEBUG_FS)) {
err = tegra_sor_debugfs_init(sor, drm->primary);
if (err < 0)
dev_err(sor->dev, "debugfs setup failed: %d\n", err);
}
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.
*/
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);
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;
return 0;
}
static int tegra_sor_exit(struct host1x_client *client)
{
struct tegra_sor *sor = host1x_client_to_sor(client);
int err;
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);
if (IS_ENABLED(CONFIG_DEBUG_FS))
tegra_sor_debugfs_exit(sor);
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;
}
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 struct tegra_sor_soc tegra124_sor = {
.supports_edp = true,
.supports_lvds = true,
.supports_hdmi = false,
.supports_dp = false,
};
static const struct tegra_sor_soc tegra210_sor = {
.supports_edp = true,
.supports_lvds = false,
.supports_hdmi = false,
.supports_dp = false,
};
static const struct tegra_sor_soc tegra210_sor1 = {
.supports_edp = false,
.supports_lvds = false,
.supports_hdmi = true,
.supports_dp = true,
.num_settings = ARRAY_SIZE(tegra210_sor_hdmi_defaults),
.settings = tegra210_sor_hdmi_defaults,
};
static const struct of_device_id tegra_sor_of_match[] = {
{ .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_probe(struct platform_device *pdev)
{
const struct of_device_id *match;
struct device_node *np;
struct tegra_sor *sor;
struct resource *regs;
int err;
match = of_match_device(tegra_sor_of_match, &pdev->dev);
sor = devm_kzalloc(&pdev->dev, sizeof(*sor), GFP_KERNEL);
if (!sor)
return -ENOMEM;
sor->output.dev = sor->dev = &pdev->dev;
sor->soc = match->data;
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;
} 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;
} 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_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;
}
sor->rst = devm_reset_control_get(&pdev->dev, "sor");
if (IS_ERR(sor->rst)) {
err = PTR_ERR(sor->rst);
dev_err(&pdev->dev, "failed to get reset control: %d\n", err);
goto remove;
}
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;
}
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;
}
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;
}
platform_set_drvdata(pdev, sor);
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;
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;
}
struct platform_driver tegra_sor_driver = {
.driver = {
.name = "tegra-sor",
.of_match_table = tegra_sor_of_match,
},
.probe = tegra_sor_probe,
.remove = tegra_sor_remove,
};
