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u-boot/drivers/video/tegra124/sor.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style 
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

1079 lines
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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2011-2013, NVIDIA Corporation.
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <malloc.h>
#include <panel.h>
#include <syscon.h>
#include <video_bridge.h>
#include <asm/io.h>
#include <asm/arch/clock.h>
#include <asm/arch-tegra/dc.h>
#include "displayport.h"
#include "sor.h"
#define DEBUG_SOR 0
#define APBDEV_PMC_DPD_SAMPLE 0x20
#define APBDEV_PMC_DPD_SAMPLE_ON_DISABLE 0
#define APBDEV_PMC_DPD_SAMPLE_ON_ENABLE 1
#define APBDEV_PMC_SEL_DPD_TIM 0x1c8
#define APBDEV_PMC_SEL_DPD_TIM_SEL_DPD_TIM_DEFAULT 0x7f
#define APBDEV_PMC_IO_DPD2_REQ 0x1c0
#define APBDEV_PMC_IO_DPD2_REQ_LVDS_SHIFT 25
#define APBDEV_PMC_IO_DPD2_REQ_LVDS_OFF (0 << 25)
#define APBDEV_PMC_IO_DPD2_REQ_LVDS_ON (1 << 25)
#define APBDEV_PMC_IO_DPD2_REQ_CODE_SHIFT 30
#define APBDEV_PMC_IO_DPD2_REQ_CODE_DEFAULT_MASK (0x3 << 30)
#define APBDEV_PMC_IO_DPD2_REQ_CODE_IDLE (0 << 30)
#define APBDEV_PMC_IO_DPD2_REQ_CODE_DPD_OFF (1 << 30)
#define APBDEV_PMC_IO_DPD2_REQ_CODE_DPD_ON (2 << 30)
#define APBDEV_PMC_IO_DPD2_STATUS 0x1c4
#define APBDEV_PMC_IO_DPD2_STATUS_LVDS_SHIFT 25
#define APBDEV_PMC_IO_DPD2_STATUS_LVDS_OFF (0 << 25)
#define APBDEV_PMC_IO_DPD2_STATUS_LVDS_ON (1 << 25)
struct tegra_dc_sor_data {
void *base;
void *pmc_base;
u8 portnum; /* 0 or 1 */
int power_is_up;
struct udevice *panel;
};
static inline u32 tegra_sor_readl(struct tegra_dc_sor_data *sor, u32 reg)
{
return readl((u32 *)sor->base + reg);
}
static inline void tegra_sor_writel(struct tegra_dc_sor_data *sor, u32 reg,
u32 val)
{
writel(val, (u32 *)sor->base + reg);
}
static inline void tegra_sor_write_field(struct tegra_dc_sor_data *sor,
u32 reg, u32 mask, u32 val)
{
u32 reg_val = tegra_sor_readl(sor, reg);
reg_val &= ~mask;
reg_val |= val;
tegra_sor_writel(sor, reg, reg_val);
}
void tegra_dp_disable_tx_pu(struct udevice *dev)
{
struct tegra_dc_sor_data *sor = dev_get_priv(dev);
tegra_sor_write_field(sor, DP_PADCTL(sor->portnum),
DP_PADCTL_TX_PU_MASK, DP_PADCTL_TX_PU_DISABLE);
}
void tegra_dp_set_pe_vs_pc(struct udevice *dev, u32 mask, u32 pe_reg,
u32 vs_reg, u32 pc_reg, u8 pc_supported)
{
struct tegra_dc_sor_data *sor = dev_get_priv(dev);
tegra_sor_write_field(sor, PR(sor->portnum), mask, pe_reg);
tegra_sor_write_field(sor, DC(sor->portnum), mask, vs_reg);
if (pc_supported) {
tegra_sor_write_field(sor, POSTCURSOR(sor->portnum), mask,
pc_reg);
}
}
static int tegra_dc_sor_poll_register(struct tegra_dc_sor_data *sor, u32 reg,
u32 mask, u32 exp_val,
int poll_interval_us, int timeout_ms)
{
u32 reg_val = 0;
ulong start;
start = get_timer(0);
do {
reg_val = tegra_sor_readl(sor, reg);
if (((reg_val & mask) == exp_val))
return 0;
udelay(poll_interval_us);
} while (get_timer(start) < timeout_ms);
debug("sor_poll_register 0x%x: timeout, (reg_val)0x%08x & (mask)0x%08x != (exp_val)0x%08x\n",
reg, reg_val, mask, exp_val);
return -ETIMEDOUT;
}
int tegra_dc_sor_set_power_state(struct udevice *dev, int pu_pd)
{
struct tegra_dc_sor_data *sor = dev_get_priv(dev);
u32 reg_val;
u32 orig_val;
orig_val = tegra_sor_readl(sor, PWR);
reg_val = pu_pd ? PWR_NORMAL_STATE_PU :
PWR_NORMAL_STATE_PD; /* normal state only */
if (reg_val == orig_val)
return 0; /* No update needed */
reg_val |= PWR_SETTING_NEW_TRIGGER;
tegra_sor_writel(sor, PWR, reg_val);
/* Poll to confirm it is done */
if (tegra_dc_sor_poll_register(sor, PWR,
PWR_SETTING_NEW_DEFAULT_MASK,
PWR_SETTING_NEW_DONE,
100, TEGRA_SOR_TIMEOUT_MS)) {
debug("dc timeout waiting for SOR_PWR = NEW_DONE\n");
return -EFAULT;
}
return 0;
}
void tegra_dc_sor_set_dp_linkctl(struct udevice *dev, int ena,
u8 training_pattern,
const struct tegra_dp_link_config *link_cfg)
{
struct tegra_dc_sor_data *sor = dev_get_priv(dev);
u32 reg_val;
reg_val = tegra_sor_readl(sor, DP_LINKCTL(sor->portnum));
if (ena)
reg_val |= DP_LINKCTL_ENABLE_YES;
else
reg_val &= DP_LINKCTL_ENABLE_NO;
reg_val &= ~DP_LINKCTL_TUSIZE_MASK;
reg_val |= (link_cfg->tu_size << DP_LINKCTL_TUSIZE_SHIFT);
if (link_cfg->enhanced_framing)
reg_val |= DP_LINKCTL_ENHANCEDFRAME_ENABLE;
tegra_sor_writel(sor, DP_LINKCTL(sor->portnum), reg_val);
switch (training_pattern) {
case training_pattern_1:
tegra_sor_writel(sor, DP_TPG, 0x41414141);
break;
case training_pattern_2:
case training_pattern_3:
reg_val = (link_cfg->link_bw == SOR_LINK_SPEED_G5_4) ?
0x43434343 : 0x42424242;
tegra_sor_writel(sor, DP_TPG, reg_val);
break;
default:
tegra_sor_writel(sor, DP_TPG, 0x50505050);
break;
}
}
static int tegra_dc_sor_enable_lane_sequencer(struct tegra_dc_sor_data *sor,
int pu, int is_lvds)
{
u32 reg_val;
/* SOR lane sequencer */
if (pu) {
reg_val = LANE_SEQ_CTL_SETTING_NEW_TRIGGER |
LANE_SEQ_CTL_SEQUENCE_DOWN |
LANE_SEQ_CTL_NEW_POWER_STATE_PU;
} else {
reg_val = LANE_SEQ_CTL_SETTING_NEW_TRIGGER |
LANE_SEQ_CTL_SEQUENCE_UP |
LANE_SEQ_CTL_NEW_POWER_STATE_PD;
}
if (is_lvds)
reg_val |= 15 << LANE_SEQ_CTL_DELAY_SHIFT;
else
reg_val |= 1 << LANE_SEQ_CTL_DELAY_SHIFT;
tegra_sor_writel(sor, LANE_SEQ_CTL, reg_val);
if (tegra_dc_sor_poll_register(sor, LANE_SEQ_CTL,
LANE_SEQ_CTL_SETTING_MASK,
LANE_SEQ_CTL_SETTING_NEW_DONE,
100, TEGRA_SOR_TIMEOUT_MS)) {
debug("dp: timeout while waiting for SOR lane sequencer to power down lanes\n");
return -1;
}
return 0;
}
static int tegra_dc_sor_power_dplanes(struct udevice *dev,
u32 lane_count, int pu)
{
struct tegra_dc_sor_data *sor = dev_get_priv(dev);
u32 reg_val;
reg_val = tegra_sor_readl(sor, DP_PADCTL(sor->portnum));
if (pu) {
switch (lane_count) {
case 4:
reg_val |= (DP_PADCTL_PD_TXD_3_NO |
DP_PADCTL_PD_TXD_2_NO);
/* fall through */
case 2:
reg_val |= DP_PADCTL_PD_TXD_1_NO;
case 1:
reg_val |= DP_PADCTL_PD_TXD_0_NO;
break;
default:
debug("dp: invalid lane number %d\n", lane_count);
return -1;
}
tegra_sor_writel(sor, DP_PADCTL(sor->portnum), reg_val);
tegra_dc_sor_set_lane_count(dev, lane_count);
}
return tegra_dc_sor_enable_lane_sequencer(sor, pu, 0);
}
void tegra_dc_sor_set_panel_power(struct udevice *dev, int power_up)
{
struct tegra_dc_sor_data *sor = dev_get_priv(dev);
u32 reg_val;
reg_val = tegra_sor_readl(sor, DP_PADCTL(sor->portnum));
if (power_up)
reg_val |= DP_PADCTL_PAD_CAL_PD_POWERUP;
else
reg_val &= ~DP_PADCTL_PAD_CAL_PD_POWERUP;
tegra_sor_writel(sor, DP_PADCTL(sor->portnum), reg_val);
}
static void tegra_dc_sor_config_pwm(struct tegra_dc_sor_data *sor, u32 pwm_div,
u32 pwm_dutycycle)
{
tegra_sor_writel(sor, PWM_DIV, pwm_div);
tegra_sor_writel(sor, PWM_CTL,
(pwm_dutycycle & PWM_CTL_DUTY_CYCLE_MASK) |
PWM_CTL_SETTING_NEW_TRIGGER);
if (tegra_dc_sor_poll_register(sor, PWM_CTL,
PWM_CTL_SETTING_NEW_SHIFT,
PWM_CTL_SETTING_NEW_DONE,
100, TEGRA_SOR_TIMEOUT_MS)) {
debug("dp: timeout while waiting for SOR PWM setting\n");
}
}
static void tegra_dc_sor_set_dp_mode(struct udevice *dev,
const struct tegra_dp_link_config *link_cfg)
{
struct tegra_dc_sor_data *sor = dev_get_priv(dev);
u32 reg_val;
tegra_dc_sor_set_link_bandwidth(dev, link_cfg->link_bw);
tegra_dc_sor_set_dp_linkctl(dev, 1, training_pattern_none, link_cfg);
reg_val = tegra_sor_readl(sor, DP_CONFIG(sor->portnum));
reg_val &= ~DP_CONFIG_WATERMARK_MASK;
reg_val |= link_cfg->watermark;
reg_val &= ~DP_CONFIG_ACTIVESYM_COUNT_MASK;
reg_val |= (link_cfg->active_count <<
DP_CONFIG_ACTIVESYM_COUNT_SHIFT);
reg_val &= ~DP_CONFIG_ACTIVESYM_FRAC_MASK;
reg_val |= (link_cfg->active_frac <<
DP_CONFIG_ACTIVESYM_FRAC_SHIFT);
if (link_cfg->activepolarity)
reg_val |= DP_CONFIG_ACTIVESYM_POLARITY_POSITIVE;
else
reg_val &= ~DP_CONFIG_ACTIVESYM_POLARITY_POSITIVE;
reg_val |= (DP_CONFIG_ACTIVESYM_CNTL_ENABLE |
DP_CONFIG_RD_RESET_VAL_NEGATIVE);
tegra_sor_writel(sor, DP_CONFIG(sor->portnum), reg_val);
/* program h/vblank sym */
tegra_sor_write_field(sor, DP_AUDIO_HBLANK_SYMBOLS,
DP_AUDIO_HBLANK_SYMBOLS_MASK,
link_cfg->hblank_sym);
tegra_sor_write_field(sor, DP_AUDIO_VBLANK_SYMBOLS,
DP_AUDIO_VBLANK_SYMBOLS_MASK,
link_cfg->vblank_sym);
}
static inline void tegra_dc_sor_super_update(struct tegra_dc_sor_data *sor)
{
tegra_sor_writel(sor, SUPER_STATE0, 0);
tegra_sor_writel(sor, SUPER_STATE0, 1);
tegra_sor_writel(sor, SUPER_STATE0, 0);
}
static inline void tegra_dc_sor_update(struct tegra_dc_sor_data *sor)
{
tegra_sor_writel(sor, STATE0, 0);
tegra_sor_writel(sor, STATE0, 1);
tegra_sor_writel(sor, STATE0, 0);
}
static int tegra_dc_sor_io_set_dpd(struct tegra_dc_sor_data *sor, int up)
{
u32 reg_val;
void *pmc_base = sor->pmc_base;
if (up) {
writel(APBDEV_PMC_DPD_SAMPLE_ON_ENABLE,
pmc_base + APBDEV_PMC_DPD_SAMPLE);
writel(10, pmc_base + APBDEV_PMC_SEL_DPD_TIM);
}
reg_val = readl(pmc_base + APBDEV_PMC_IO_DPD2_REQ);
reg_val &= ~(APBDEV_PMC_IO_DPD2_REQ_LVDS_ON ||
APBDEV_PMC_IO_DPD2_REQ_CODE_DEFAULT_MASK);
reg_val = up ? APBDEV_PMC_IO_DPD2_REQ_LVDS_ON |
APBDEV_PMC_IO_DPD2_REQ_CODE_DPD_OFF :
APBDEV_PMC_IO_DPD2_REQ_LVDS_OFF |
APBDEV_PMC_IO_DPD2_REQ_CODE_DPD_ON;
writel(reg_val, pmc_base + APBDEV_PMC_IO_DPD2_REQ);
/* Polling */
u32 temp = 10 * 1000;
do {
udelay(20);
reg_val = readl(pmc_base + APBDEV_PMC_IO_DPD2_STATUS);
if (temp > 20)
temp -= 20;
else
break;
} while ((reg_val & APBDEV_PMC_IO_DPD2_STATUS_LVDS_ON) != 0);
if ((reg_val & APBDEV_PMC_IO_DPD2_STATUS_LVDS_ON) != 0) {
debug("PMC_IO_DPD2 polling failed (0x%x)\n", reg_val);
return -EIO;
}
if (up) {
writel(APBDEV_PMC_DPD_SAMPLE_ON_DISABLE,
pmc_base + APBDEV_PMC_DPD_SAMPLE);
}
return 0;
}
void tegra_dc_sor_set_internal_panel(struct udevice *dev, int is_int)
{
struct tegra_dc_sor_data *sor = dev_get_priv(dev);
u32 reg_val;
reg_val = tegra_sor_readl(sor, DP_SPARE(sor->portnum));
if (is_int)
reg_val |= DP_SPARE_PANEL_INTERNAL;
else
reg_val &= ~DP_SPARE_PANEL_INTERNAL;
reg_val |= DP_SPARE_SOR_CLK_SEL_MACRO_SORCLK |
DP_SPARE_SEQ_ENABLE_YES;
tegra_sor_writel(sor, DP_SPARE(sor->portnum), reg_val);
}
void tegra_dc_sor_read_link_config(struct udevice *dev, u8 *link_bw,
u8 *lane_count)
{
struct tegra_dc_sor_data *sor = dev_get_priv(dev);
u32 reg_val;
reg_val = tegra_sor_readl(sor, CLK_CNTRL);
*link_bw = (reg_val & CLK_CNTRL_DP_LINK_SPEED_MASK)
>> CLK_CNTRL_DP_LINK_SPEED_SHIFT;
reg_val = tegra_sor_readl(sor,
DP_LINKCTL(sor->portnum));
switch (reg_val & DP_LINKCTL_LANECOUNT_MASK) {
case DP_LINKCTL_LANECOUNT_ZERO:
*lane_count = 0;
break;
case DP_LINKCTL_LANECOUNT_ONE:
*lane_count = 1;
break;
case DP_LINKCTL_LANECOUNT_TWO:
*lane_count = 2;
break;
case DP_LINKCTL_LANECOUNT_FOUR:
*lane_count = 4;
break;
default:
printf("Unknown lane count\n");
}
}
void tegra_dc_sor_set_link_bandwidth(struct udevice *dev, u8 link_bw)
{
struct tegra_dc_sor_data *sor = dev_get_priv(dev);
tegra_sor_write_field(sor, CLK_CNTRL,
CLK_CNTRL_DP_LINK_SPEED_MASK,
link_bw << CLK_CNTRL_DP_LINK_SPEED_SHIFT);
}
void tegra_dc_sor_set_lane_count(struct udevice *dev, u8 lane_count)
{
struct tegra_dc_sor_data *sor = dev_get_priv(dev);
u32 reg_val;
reg_val = tegra_sor_readl(sor, DP_LINKCTL(sor->portnum));
reg_val &= ~DP_LINKCTL_LANECOUNT_MASK;
switch (lane_count) {
case 0:
break;
case 1:
reg_val |= DP_LINKCTL_LANECOUNT_ONE;
break;
case 2:
reg_val |= DP_LINKCTL_LANECOUNT_TWO;
break;
case 4:
reg_val |= DP_LINKCTL_LANECOUNT_FOUR;
break;
default:
/* 0 should be handled earlier. */
printf("dp: Invalid lane count %d\n", lane_count);
return;
}
tegra_sor_writel(sor, DP_LINKCTL(sor->portnum), reg_val);
}
/*
* The SOR power sequencer does not work for t124 so SW has to
* go through the power sequence manually
* Power up steps from spec:
* STEP PDPORT PDPLL PDBG PLLVCOD PLLCAPD E_DPD PDCAL
* 1 1 1 1 1 1 1 1
* 2 1 1 1 1 1 0 1
* 3 1 1 0 1 1 0 1
* 4 1 0 0 0 0 0 1
* 5 0 0 0 0 0 0 1
*/
static int tegra_dc_sor_power_up(struct udevice *dev, int is_lvds)
{
struct tegra_dc_sor_data *sor = dev_get_priv(dev);
u32 reg;
int ret;
if (sor->power_is_up)
return 0;
/*
* If for some reason it is already powered up, don't do it again.
* This can happen if U-Boot is the secondary boot loader.
*/
reg = tegra_sor_readl(sor, DP_PADCTL(sor->portnum));
if (reg & DP_PADCTL_PD_TXD_0_NO)
return 0;
/* Set link bw */
tegra_dc_sor_set_link_bandwidth(dev, is_lvds ?
CLK_CNTRL_DP_LINK_SPEED_LVDS :
CLK_CNTRL_DP_LINK_SPEED_G1_62);
/* step 1 */
tegra_sor_write_field(sor, PLL2,
PLL2_AUX7_PORT_POWERDOWN_MASK | /* PDPORT */
PLL2_AUX6_BANDGAP_POWERDOWN_MASK | /* PDBG */
PLL2_AUX8_SEQ_PLLCAPPD_ENFORCE_MASK, /* PLLCAPD */
PLL2_AUX7_PORT_POWERDOWN_ENABLE |
PLL2_AUX6_BANDGAP_POWERDOWN_ENABLE |
PLL2_AUX8_SEQ_PLLCAPPD_ENFORCE_ENABLE);
tegra_sor_write_field(sor, PLL0, PLL0_PWR_MASK | /* PDPLL */
PLL0_VCOPD_MASK, /* PLLVCOPD */
PLL0_PWR_OFF | PLL0_VCOPD_ASSERT);
tegra_sor_write_field(sor, DP_PADCTL(sor->portnum),
DP_PADCTL_PAD_CAL_PD_POWERDOWN, /* PDCAL */
DP_PADCTL_PAD_CAL_PD_POWERDOWN);
/* step 2 */
ret = tegra_dc_sor_io_set_dpd(sor, 1);
if (ret)
return ret;
udelay(15);
/* step 3 */
tegra_sor_write_field(sor, PLL2,
PLL2_AUX6_BANDGAP_POWERDOWN_MASK,
PLL2_AUX6_BANDGAP_POWERDOWN_DISABLE);
udelay(25);
/* step 4 */
tegra_sor_write_field(sor, PLL0,
PLL0_PWR_MASK | /* PDPLL */
PLL0_VCOPD_MASK, /* PLLVCOPD */
PLL0_PWR_ON | PLL0_VCOPD_RESCIND);
/* PLLCAPD */
tegra_sor_write_field(sor, PLL2,
PLL2_AUX8_SEQ_PLLCAPPD_ENFORCE_MASK,
PLL2_AUX8_SEQ_PLLCAPPD_ENFORCE_DISABLE);
udelay(225);
/* step 5 PDPORT */
tegra_sor_write_field(sor, PLL2,
PLL2_AUX7_PORT_POWERDOWN_MASK,
PLL2_AUX7_PORT_POWERDOWN_DISABLE);
sor->power_is_up = 1;
return 0;
}
#if DEBUG_SOR
static void dump_sor_reg(struct tegra_dc_sor_data *sor)
{
#define DUMP_REG(a) printk(BIOS_INFO, "%-32s %03x %08x\n", \
#a, a, tegra_sor_readl(sor, a));
DUMP_REG(SUPER_STATE0);
DUMP_REG(SUPER_STATE1);
DUMP_REG(STATE0);
DUMP_REG(STATE1);
DUMP_REG(NV_HEAD_STATE0(0));
DUMP_REG(NV_HEAD_STATE0(1));
DUMP_REG(NV_HEAD_STATE1(0));
DUMP_REG(NV_HEAD_STATE1(1));
DUMP_REG(NV_HEAD_STATE2(0));
DUMP_REG(NV_HEAD_STATE2(1));
DUMP_REG(NV_HEAD_STATE3(0));
DUMP_REG(NV_HEAD_STATE3(1));
DUMP_REG(NV_HEAD_STATE4(0));
DUMP_REG(NV_HEAD_STATE4(1));
DUMP_REG(NV_HEAD_STATE5(0));
DUMP_REG(NV_HEAD_STATE5(1));
DUMP_REG(CRC_CNTRL);
DUMP_REG(CLK_CNTRL);
DUMP_REG(CAP);
DUMP_REG(PWR);
DUMP_REG(TEST);
DUMP_REG(PLL0);
DUMP_REG(PLL1);
DUMP_REG(PLL2);
DUMP_REG(PLL3);
DUMP_REG(CSTM);
DUMP_REG(LVDS);
DUMP_REG(CRCA);
DUMP_REG(CRCB);
DUMP_REG(SEQ_CTL);
DUMP_REG(LANE_SEQ_CTL);
DUMP_REG(SEQ_INST(0));
DUMP_REG(SEQ_INST(1));
DUMP_REG(SEQ_INST(2));
DUMP_REG(SEQ_INST(3));
DUMP_REG(SEQ_INST(4));
DUMP_REG(SEQ_INST(5));
DUMP_REG(SEQ_INST(6));
DUMP_REG(SEQ_INST(7));
DUMP_REG(SEQ_INST(8));
DUMP_REG(PWM_DIV);
DUMP_REG(PWM_CTL);
DUMP_REG(MSCHECK);
DUMP_REG(XBAR_CTRL);
DUMP_REG(DP_LINKCTL(0));
DUMP_REG(DP_LINKCTL(1));
DUMP_REG(DC(0));
DUMP_REG(DC(1));
DUMP_REG(LANE_DRIVE_CURRENT(0));
DUMP_REG(PR(0));
DUMP_REG(LANE4_PREEMPHASIS(0));
DUMP_REG(POSTCURSOR(0));
DUMP_REG(DP_CONFIG(0));
DUMP_REG(DP_CONFIG(1));
DUMP_REG(DP_MN(0));
DUMP_REG(DP_MN(1));
DUMP_REG(DP_PADCTL(0));
DUMP_REG(DP_PADCTL(1));
DUMP_REG(DP_DEBUG(0));
DUMP_REG(DP_DEBUG(1));
DUMP_REG(DP_SPARE(0));
DUMP_REG(DP_SPARE(1));
DUMP_REG(DP_TPG);
return;
}
#endif
static void tegra_dc_sor_config_panel(struct tegra_dc_sor_data *sor,
int is_lvds,
const struct tegra_dp_link_config *link_cfg,
const struct display_timing *timing)
{
const int head_num = 0;
u32 reg_val = STATE1_ASY_OWNER_HEAD0 << head_num;
u32 vtotal, htotal;
u32 vsync_end, hsync_end;
u32 vblank_end, hblank_end;
u32 vblank_start, hblank_start;
reg_val |= is_lvds ? STATE1_ASY_PROTOCOL_LVDS_CUSTOM :
STATE1_ASY_PROTOCOL_DP_A;
reg_val |= STATE1_ASY_SUBOWNER_NONE |
STATE1_ASY_CRCMODE_COMPLETE_RASTER;
reg_val |= STATE1_ASY_HSYNCPOL_NEGATIVE_TRUE;
reg_val |= STATE1_ASY_VSYNCPOL_NEGATIVE_TRUE;
reg_val |= (link_cfg->bits_per_pixel > 18) ?
STATE1_ASY_PIXELDEPTH_BPP_24_444 :
STATE1_ASY_PIXELDEPTH_BPP_18_444;
tegra_sor_writel(sor, STATE1, reg_val);
/*
* Skipping programming NV_HEAD_STATE0, assuming:
* interlacing: PROGRESSIVE, dynamic range: VESA, colorspace: RGB
*/
vtotal = timing->vsync_len.typ + timing->vback_porch.typ +
timing->vactive.typ + timing->vfront_porch.typ;
htotal = timing->hsync_len.typ + timing->hback_porch.typ +
timing->hactive.typ + timing->hfront_porch.typ;
tegra_sor_writel(sor, NV_HEAD_STATE1(head_num),
vtotal << NV_HEAD_STATE1_VTOTAL_SHIFT |
htotal << NV_HEAD_STATE1_HTOTAL_SHIFT);
vsync_end = timing->vsync_len.typ - 1;
hsync_end = timing->hsync_len.typ - 1;
tegra_sor_writel(sor, NV_HEAD_STATE2(head_num),
vsync_end << NV_HEAD_STATE2_VSYNC_END_SHIFT |
hsync_end << NV_HEAD_STATE2_HSYNC_END_SHIFT);
vblank_end = vsync_end + timing->vback_porch.typ;
hblank_end = hsync_end + timing->hback_porch.typ;
tegra_sor_writel(sor, NV_HEAD_STATE3(head_num),
vblank_end << NV_HEAD_STATE3_VBLANK_END_SHIFT |
hblank_end << NV_HEAD_STATE3_HBLANK_END_SHIFT);
vblank_start = vblank_end + timing->vactive.typ;
hblank_start = hblank_end + timing->hactive.typ;
tegra_sor_writel(sor, NV_HEAD_STATE4(head_num),
vblank_start << NV_HEAD_STATE4_VBLANK_START_SHIFT |
hblank_start << NV_HEAD_STATE4_HBLANK_START_SHIFT);
/* TODO: adding interlace mode support */
tegra_sor_writel(sor, NV_HEAD_STATE5(head_num), 0x1);
tegra_sor_write_field(sor, CSTM,
CSTM_ROTCLK_DEFAULT_MASK |
CSTM_LVDS_EN_ENABLE,
2 << CSTM_ROTCLK_SHIFT |
is_lvds ? CSTM_LVDS_EN_ENABLE :
CSTM_LVDS_EN_DISABLE);
tegra_dc_sor_config_pwm(sor, 1024, 1024);
}
static void tegra_dc_sor_enable_dc(struct dc_ctlr *disp_ctrl)
{
u32 reg_val = readl(&disp_ctrl->cmd.state_access);
writel(reg_val | WRITE_MUX_ACTIVE, &disp_ctrl->cmd.state_access);
writel(VSYNC_H_POSITION(1), &disp_ctrl->disp.disp_timing_opt);
/* Enable DC now - otherwise pure text console may not show. */
writel(CTRL_MODE_C_DISPLAY << CTRL_MODE_SHIFT,
&disp_ctrl->cmd.disp_cmd);
writel(reg_val, &disp_ctrl->cmd.state_access);
}
int tegra_dc_sor_enable_dp(struct udevice *dev,
const struct tegra_dp_link_config *link_cfg)
{
struct tegra_dc_sor_data *sor = dev_get_priv(dev);
int ret;
tegra_sor_write_field(sor, CLK_CNTRL,
CLK_CNTRL_DP_CLK_SEL_MASK,
CLK_CNTRL_DP_CLK_SEL_SINGLE_DPCLK);
tegra_sor_write_field(sor, PLL2,
PLL2_AUX6_BANDGAP_POWERDOWN_MASK,
PLL2_AUX6_BANDGAP_POWERDOWN_DISABLE);
udelay(25);
tegra_sor_write_field(sor, PLL3,
PLL3_PLLVDD_MODE_MASK,
PLL3_PLLVDD_MODE_V3_3);
tegra_sor_writel(sor, PLL0,
0xf << PLL0_ICHPMP_SHFIT |
0x3 << PLL0_VCOCAP_SHIFT |
PLL0_PLLREG_LEVEL_V45 |
PLL0_RESISTORSEL_EXT |
PLL0_PWR_ON | PLL0_VCOPD_RESCIND);
tegra_sor_write_field(sor, PLL2,
PLL2_AUX1_SEQ_MASK |
PLL2_AUX9_LVDSEN_OVERRIDE |
PLL2_AUX8_SEQ_PLLCAPPD_ENFORCE_MASK,
PLL2_AUX1_SEQ_PLLCAPPD_OVERRIDE |
PLL2_AUX9_LVDSEN_OVERRIDE |
PLL2_AUX8_SEQ_PLLCAPPD_ENFORCE_DISABLE);
tegra_sor_writel(sor, PLL1, PLL1_TERM_COMPOUT_HIGH |
PLL1_TMDS_TERM_ENABLE);
if (tegra_dc_sor_poll_register(sor, PLL2,
PLL2_AUX8_SEQ_PLLCAPPD_ENFORCE_MASK,
PLL2_AUX8_SEQ_PLLCAPPD_ENFORCE_DISABLE,
100, TEGRA_SOR_TIMEOUT_MS)) {
printf("DP failed to lock PLL\n");
return -EIO;
}
tegra_sor_write_field(sor, PLL2, PLL2_AUX2_MASK |
PLL2_AUX7_PORT_POWERDOWN_MASK,
PLL2_AUX2_OVERRIDE_POWERDOWN |
PLL2_AUX7_PORT_POWERDOWN_DISABLE);
ret = tegra_dc_sor_power_up(dev, 0);
if (ret) {
debug("DP failed to power up\n");
return ret;
}
/* re-enable SOR clock */
clock_sor_enable_edp_clock();
/* Power up lanes */
tegra_dc_sor_power_dplanes(dev, link_cfg->lane_count, 1);
tegra_dc_sor_set_dp_mode(dev, link_cfg);
debug("%s ret\n", __func__);
return 0;
}
int tegra_dc_sor_attach(struct udevice *dc_dev, struct udevice *dev,
const struct tegra_dp_link_config *link_cfg,
const struct display_timing *timing)
{
struct tegra_dc_sor_data *sor = dev_get_priv(dev);
struct dc_ctlr *disp_ctrl;
u32 reg_val;
/* Use the first display controller */
debug("%s\n", __func__);
disp_ctrl = (struct dc_ctlr *)dev_read_addr(dc_dev);
tegra_dc_sor_enable_dc(disp_ctrl);
tegra_dc_sor_config_panel(sor, 0, link_cfg, timing);
writel(0x9f00, &disp_ctrl->cmd.state_ctrl);
writel(0x9f, &disp_ctrl->cmd.state_ctrl);
writel(PW0_ENABLE | PW1_ENABLE | PW2_ENABLE | PW3_ENABLE |
PW4_ENABLE | PM0_ENABLE | PM1_ENABLE,
&disp_ctrl->cmd.disp_pow_ctrl);
reg_val = tegra_sor_readl(sor, TEST);
if (reg_val & TEST_ATTACHED_TRUE)
return -EEXIST;
tegra_sor_writel(sor, SUPER_STATE1,
SUPER_STATE1_ATTACHED_NO);
/*
* Enable display2sor clock at least 2 cycles before DC start,
* to clear sor internal valid signal.
*/
writel(SOR_ENABLE, &disp_ctrl->disp.disp_win_opt);
writel(GENERAL_ACT_REQ, &disp_ctrl->cmd.state_ctrl);
writel(0, &disp_ctrl->disp.disp_win_opt);
writel(GENERAL_ACT_REQ, &disp_ctrl->cmd.state_ctrl);
/* Attach head */
tegra_dc_sor_update(sor);
tegra_sor_writel(sor, SUPER_STATE1,
SUPER_STATE1_ATTACHED_YES);
tegra_sor_writel(sor, SUPER_STATE1,
SUPER_STATE1_ATTACHED_YES |
SUPER_STATE1_ASY_HEAD_OP_AWAKE |
SUPER_STATE1_ASY_ORMODE_NORMAL);
tegra_dc_sor_super_update(sor);
/* Enable dc */
reg_val = readl(&disp_ctrl->cmd.state_access);
writel(reg_val | WRITE_MUX_ACTIVE, &disp_ctrl->cmd.state_access);
writel(CTRL_MODE_C_DISPLAY << CTRL_MODE_SHIFT,
&disp_ctrl->cmd.disp_cmd);
writel(SOR_ENABLE, &disp_ctrl->disp.disp_win_opt);
writel(reg_val, &disp_ctrl->cmd.state_access);
if (tegra_dc_sor_poll_register(sor, TEST,
TEST_ACT_HEAD_OPMODE_DEFAULT_MASK,
TEST_ACT_HEAD_OPMODE_AWAKE,
100,
TEGRA_SOR_ATTACH_TIMEOUT_MS)) {
printf("dc timeout waiting for OPMOD = AWAKE\n");
return -ETIMEDOUT;
} else {
debug("%s: sor is attached\n", __func__);
}
#if DEBUG_SOR
dump_sor_reg(sor);
#endif
debug("%s: ret=%d\n", __func__, 0);
return 0;
}
void tegra_dc_sor_set_lane_parm(struct udevice *dev,
const struct tegra_dp_link_config *link_cfg)
{
struct tegra_dc_sor_data *sor = dev_get_priv(dev);
tegra_sor_writel(sor, LANE_DRIVE_CURRENT(sor->portnum),
link_cfg->drive_current);
tegra_sor_writel(sor, PR(sor->portnum),
link_cfg->preemphasis);
tegra_sor_writel(sor, POSTCURSOR(sor->portnum),
link_cfg->postcursor);
tegra_sor_writel(sor, LVDS, 0);
tegra_dc_sor_set_link_bandwidth(dev, link_cfg->link_bw);
tegra_dc_sor_set_lane_count(dev, link_cfg->lane_count);
tegra_sor_write_field(sor, DP_PADCTL(sor->portnum),
DP_PADCTL_TX_PU_ENABLE |
DP_PADCTL_TX_PU_VALUE_DEFAULT_MASK,
DP_PADCTL_TX_PU_ENABLE |
2 << DP_PADCTL_TX_PU_VALUE_SHIFT);
/* Precharge */
tegra_sor_write_field(sor, DP_PADCTL(sor->portnum), 0xf0, 0xf0);
udelay(20);
tegra_sor_write_field(sor, DP_PADCTL(sor->portnum), 0xf0, 0x0);
}
int tegra_dc_sor_set_voltage_swing(struct udevice *dev,
const struct tegra_dp_link_config *link_cfg)
{
struct tegra_dc_sor_data *sor = dev_get_priv(dev);
u32 drive_current = 0;
u32 pre_emphasis = 0;
/* Set to a known-good pre-calibrated setting */
switch (link_cfg->link_bw) {
case SOR_LINK_SPEED_G1_62:
case SOR_LINK_SPEED_G2_7:
drive_current = 0x13131313;
pre_emphasis = 0;
break;
case SOR_LINK_SPEED_G5_4:
debug("T124 does not support 5.4G link clock.\n");
default:
debug("Invalid sor link bandwidth: %d\n", link_cfg->link_bw);
return -ENOLINK;
}
tegra_sor_writel(sor, LANE_DRIVE_CURRENT(sor->portnum), drive_current);
tegra_sor_writel(sor, PR(sor->portnum), pre_emphasis);
return 0;
}
void tegra_dc_sor_power_down_unused_lanes(struct udevice *dev,
const struct tegra_dp_link_config *link_cfg)
{
struct tegra_dc_sor_data *sor = dev_get_priv(dev);
u32 pad_ctrl = 0;
int err = 0;
switch (link_cfg->lane_count) {
case 4:
pad_ctrl = DP_PADCTL_PD_TXD_0_NO |
DP_PADCTL_PD_TXD_1_NO |
DP_PADCTL_PD_TXD_2_NO |
DP_PADCTL_PD_TXD_3_NO;
break;
case 2:
pad_ctrl = DP_PADCTL_PD_TXD_0_NO |
DP_PADCTL_PD_TXD_1_NO |
DP_PADCTL_PD_TXD_2_YES |
DP_PADCTL_PD_TXD_3_YES;
break;
case 1:
pad_ctrl = DP_PADCTL_PD_TXD_0_NO |
DP_PADCTL_PD_TXD_1_YES |
DP_PADCTL_PD_TXD_2_YES |
DP_PADCTL_PD_TXD_3_YES;
break;
default:
printf("Invalid sor lane count: %u\n", link_cfg->lane_count);
return;
}
pad_ctrl |= DP_PADCTL_PAD_CAL_PD_POWERDOWN;
tegra_sor_writel(sor, DP_PADCTL(sor->portnum), pad_ctrl);
err = tegra_dc_sor_enable_lane_sequencer(sor, 0, 0);
if (err) {
debug("Wait for lane power down failed: %d\n", err);
return;
}
}
int tegra_sor_precharge_lanes(struct udevice *dev,
const struct tegra_dp_link_config *cfg)
{
struct tegra_dc_sor_data *sor = dev_get_priv(dev);
u32 val = 0;
switch (cfg->lane_count) {
case 4:
val |= (DP_PADCTL_PD_TXD_3_NO |
DP_PADCTL_PD_TXD_2_NO);
/* fall through */
case 2:
val |= DP_PADCTL_PD_TXD_1_NO;
/* fall through */
case 1:
val |= DP_PADCTL_PD_TXD_0_NO;
break;
default:
debug("dp: invalid lane number %d\n", cfg->lane_count);
return -EINVAL;
}
tegra_sor_write_field(sor, DP_PADCTL(sor->portnum),
(0xf << DP_PADCTL_COMODE_TXD_0_DP_TXD_2_SHIFT),
(val << DP_PADCTL_COMODE_TXD_0_DP_TXD_2_SHIFT));
udelay(100);
tegra_sor_write_field(sor, DP_PADCTL(sor->portnum),
(0xf << DP_PADCTL_COMODE_TXD_0_DP_TXD_2_SHIFT),
0);
return 0;
}
static void tegra_dc_sor_enable_sor(struct dc_ctlr *disp_ctrl, bool enable)
{
u32 reg_val = readl(&disp_ctrl->disp.disp_win_opt);
reg_val = enable ? reg_val | SOR_ENABLE : reg_val & ~SOR_ENABLE;
writel(reg_val, &disp_ctrl->disp.disp_win_opt);
}
int tegra_dc_sor_detach(struct udevice *dc_dev, struct udevice *dev)
{
struct tegra_dc_sor_data *sor = dev_get_priv(dev);
int dc_reg_ctx[DC_REG_SAVE_SPACE];
struct dc_ctlr *disp_ctrl;
unsigned long dc_int_mask;
int ret;
debug("%s\n", __func__);
/* Use the first display controller */
disp_ctrl = (struct dc_ctlr *)dev_read_addr(dev);
/* Sleep mode */
tegra_sor_writel(sor, SUPER_STATE1, SUPER_STATE1_ASY_HEAD_OP_SLEEP |
SUPER_STATE1_ASY_ORMODE_SAFE |
SUPER_STATE1_ATTACHED_YES);
tegra_dc_sor_super_update(sor);
tegra_dc_sor_disable_win_short_raster(disp_ctrl, dc_reg_ctx);
if (tegra_dc_sor_poll_register(sor, TEST,
TEST_ACT_HEAD_OPMODE_DEFAULT_MASK,
TEST_ACT_HEAD_OPMODE_SLEEP, 100,
TEGRA_SOR_ATTACH_TIMEOUT_MS)) {
debug("dc timeout waiting for OPMOD = SLEEP\n");
ret = -ETIMEDOUT;
goto err;
}
tegra_sor_writel(sor, SUPER_STATE1, SUPER_STATE1_ASY_HEAD_OP_SLEEP |
SUPER_STATE1_ASY_ORMODE_SAFE |
SUPER_STATE1_ATTACHED_NO);
/* Mask DC interrupts during the 2 dummy frames required for detach */
dc_int_mask = readl(&disp_ctrl->cmd.int_mask);
writel(0, &disp_ctrl->cmd.int_mask);
/* Stop DC->SOR path */
tegra_dc_sor_enable_sor(disp_ctrl, false);
ret = tegra_dc_sor_general_act(disp_ctrl);
if (ret)
goto err;
/* Stop DC */
writel(CTRL_MODE_STOP << CTRL_MODE_SHIFT, &disp_ctrl->cmd.disp_cmd);
ret = tegra_dc_sor_general_act(disp_ctrl);
if (ret)
goto err;
tegra_dc_sor_restore_win_and_raster(disp_ctrl, dc_reg_ctx);
writel(dc_int_mask, &disp_ctrl->cmd.int_mask);
return 0;
err:
debug("%s: ret=%d\n", __func__, ret);
return ret;
}
static int tegra_sor_set_backlight(struct udevice *dev, int percent)
{
struct tegra_dc_sor_data *priv = dev_get_priv(dev);
int ret;
ret = panel_enable_backlight(priv->panel);
if (ret) {
debug("sor: Cannot enable panel backlight\n");
return ret;
}
return 0;
}
static int tegra_sor_ofdata_to_platdata(struct udevice *dev)
{
struct tegra_dc_sor_data *priv = dev_get_priv(dev);
int ret;
priv->base = (void *)dev_read_addr(dev);
priv->pmc_base = (void *)syscon_get_first_range(TEGRA_SYSCON_PMC);
if (IS_ERR(priv->pmc_base))
return PTR_ERR(priv->pmc_base);
ret = uclass_get_device_by_phandle(UCLASS_PANEL, dev, "nvidia,panel",
&priv->panel);
if (ret) {
debug("%s: Cannot find panel for '%s' (ret=%d)\n", __func__,
dev->name, ret);
return ret;
}
return 0;
}
static const struct video_bridge_ops tegra_sor_ops = {
.set_backlight = tegra_sor_set_backlight,
};
static const struct udevice_id tegra_sor_ids[] = {
{ .compatible = "nvidia,tegra124-sor" },
{ }
};
U_BOOT_DRIVER(sor_tegra) = {
.name = "sor_tegra",
.id = UCLASS_VIDEO_BRIDGE,
.of_match = tegra_sor_ids,
.ofdata_to_platdata = tegra_sor_ofdata_to_platdata,
.ops = &tegra_sor_ops,
.priv_auto_alloc_size = sizeof(struct tegra_dc_sor_data),
};
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