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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 <log.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 <linux/delay.h>
- #include "displayport.h"
- #include "sor.h"
- #include <linux/err.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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