1 files changed, 623 insertions, 0 deletions

diff --git a/drivers/video/tegra/hdmi.c b/drivers/video/tegra/hdmi.c
new file mode 100644
index 00000000000..bfb48b25187
--- /dev/null
+++ b/drivers/video/tegra/hdmi.c
@@ -0,0 +1,623 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2013 NVIDIA Corporation
+ * Copyright (c) 2023 Svyatoslav Ryhel <clamor95@gmail.com>
+ */
+
+#include <clk.h>
+#include <dm.h>
+#include <edid.h>
+#include <i2c.h>
+#include <log.h>
+#include <misc.h>
+#include <panel.h>
+#include <reset.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/time.h>
+#include <power/regulator.h>
+#include <video_bridge.h>
+
+#include <asm/gpio.h>
+#include <asm/io.h>
+#include <asm/arch/clock.h>
+
+#include "dc.h"
+#include "hdmi.h"
+
+#define DDCCI_ENTRY_ADDR	0x37
+#define DDCCI_SOURSE_ADDR	0x51
+#define DDCCI_COMMAND_WRITE	0x03
+#define DDCCI_CTRL_BRIGHTNESS	0x10
+
+#define HDMI_EDID_I2C_ADDR	0x50
+#define HDMI_REKEY_DEFAULT	56
+
+static const char * const hdmi_supplies[] = {
+	"hdmi-supply", "pll-supply", "vdd-supply"
+};
+
+struct tmds_config {
+	unsigned int pclk;
+	u32 pll0;
+	u32 pll1;
+	u32 pe_current;
+	u32 drive_current;
+	u32 peak_current;
+};
+
+struct tegra_hdmi_config {
+	const struct tmds_config *tmds;
+	unsigned int num_tmds;
+	unsigned int max_pclk;
+
+	/* to be filled */
+};
+
+struct tegra_hdmi_priv {
+	struct hdmi_ctlr *hdmi_regmap;
+
+	struct udevice *supplies[ARRAY_SIZE(hdmi_supplies)];
+	struct udevice *hdmi_ddc;
+
+	struct gpio_desc hpd; /* hotplug detection gpio */
+	struct display_timing timing;
+
+	struct clk *clk;
+	struct clk *clk_parent;
+
+	int panel_bits_per_colourp;
+	const struct tegra_hdmi_config *config;
+};
+
+/* 1280x720p 60hz: EIA/CEA-861-B Format 4 */
+static struct display_timing default_720p_timing = {
+	.pixelclock.typ		= 74250000,
+	.hactive.typ		= 1280,
+	.hfront_porch.typ	= 110,
+	.hback_porch.typ	= 220,
+	.hsync_len.typ		= 40,
+	.vactive.typ		= 720,
+	.vfront_porch.typ	= 5,
+	.vback_porch.typ	= 20,
+	.vsync_len.typ		= 5,
+	.flags			= DISPLAY_FLAGS_HSYNC_HIGH |
+				  DISPLAY_FLAGS_VSYNC_HIGH,
+};
+
+static const struct tmds_config tegra20_tmds_config[] = {
+	{ /* slow pixel clock modes */
+		.pclk = 27000000,
+		.pll0 = SOR_PLL_BG_V17_S(3) | SOR_PLL_ICHPMP(1) |
+			SOR_PLL_RESISTORSEL | SOR_PLL_VCOCAP(0) |
+			SOR_PLL_TX_REG_LOAD(3),
+		.pll1 = SOR_PLL_TMDS_TERM_ENABLE,
+		.pe_current = PE_CURRENT0(PE_CURRENT_0_0_mA) |
+			PE_CURRENT1(PE_CURRENT_0_0_mA) |
+			PE_CURRENT2(PE_CURRENT_0_0_mA) |
+			PE_CURRENT3(PE_CURRENT_0_0_mA),
+		.drive_current = DRIVE_CURRENT_LANE0(DRIVE_CURRENT_7_125_mA) |
+			DRIVE_CURRENT_LANE1(DRIVE_CURRENT_7_125_mA) |
+			DRIVE_CURRENT_LANE2(DRIVE_CURRENT_7_125_mA) |
+			DRIVE_CURRENT_LANE3(DRIVE_CURRENT_7_125_mA),
+	},
+	{ /* high pixel clock modes */
+		.pclk = UINT_MAX,
+		.pll0 = SOR_PLL_BG_V17_S(3) | SOR_PLL_ICHPMP(1) |
+			SOR_PLL_RESISTORSEL | SOR_PLL_VCOCAP(1) |
+			SOR_PLL_TX_REG_LOAD(3),
+		.pll1 = SOR_PLL_TMDS_TERM_ENABLE | SOR_PLL_PE_EN,
+		.pe_current = PE_CURRENT0(PE_CURRENT_6_0_mA) |
+			PE_CURRENT1(PE_CURRENT_6_0_mA) |
+			PE_CURRENT2(PE_CURRENT_6_0_mA) |
+			PE_CURRENT3(PE_CURRENT_6_0_mA),
+		.drive_current = DRIVE_CURRENT_LANE0(DRIVE_CURRENT_7_125_mA) |
+			DRIVE_CURRENT_LANE1(DRIVE_CURRENT_7_125_mA) |
+			DRIVE_CURRENT_LANE2(DRIVE_CURRENT_7_125_mA) |
+			DRIVE_CURRENT_LANE3(DRIVE_CURRENT_7_125_mA),
+	},
+};
+
+static const struct tmds_config tegra30_tmds_config[] = {
+	{ /* 480p modes */
+		.pclk = 27000000,
+		.pll0 = SOR_PLL_BG_V17_S(3) | SOR_PLL_ICHPMP(1) |
+			SOR_PLL_RESISTORSEL | SOR_PLL_VCOCAP(0) |
+			SOR_PLL_TX_REG_LOAD(0),
+		.pll1 = SOR_PLL_TMDS_TERM_ENABLE,
+		.pe_current = PE_CURRENT0(PE_CURRENT_0_0_mA) |
+			PE_CURRENT1(PE_CURRENT_0_0_mA) |
+			PE_CURRENT2(PE_CURRENT_0_0_mA) |
+			PE_CURRENT3(PE_CURRENT_0_0_mA),
+		.drive_current = DRIVE_CURRENT_LANE0(DRIVE_CURRENT_5_250_mA) |
+			DRIVE_CURRENT_LANE1(DRIVE_CURRENT_5_250_mA) |
+			DRIVE_CURRENT_LANE2(DRIVE_CURRENT_5_250_mA) |
+			DRIVE_CURRENT_LANE3(DRIVE_CURRENT_5_250_mA),
+	}, { /* 720p modes */
+		.pclk = 74250000,
+		.pll0 = SOR_PLL_BG_V17_S(3) | SOR_PLL_ICHPMP(1) |
+			SOR_PLL_RESISTORSEL | SOR_PLL_VCOCAP(1) |
+			SOR_PLL_TX_REG_LOAD(0),
+		.pll1 = SOR_PLL_TMDS_TERM_ENABLE | SOR_PLL_PE_EN,
+		.pe_current = PE_CURRENT0(PE_CURRENT_5_0_mA) |
+			PE_CURRENT1(PE_CURRENT_5_0_mA) |
+			PE_CURRENT2(PE_CURRENT_5_0_mA) |
+			PE_CURRENT3(PE_CURRENT_5_0_mA),
+		.drive_current = DRIVE_CURRENT_LANE0(DRIVE_CURRENT_5_250_mA) |
+			DRIVE_CURRENT_LANE1(DRIVE_CURRENT_5_250_mA) |
+			DRIVE_CURRENT_LANE2(DRIVE_CURRENT_5_250_mA) |
+			DRIVE_CURRENT_LANE3(DRIVE_CURRENT_5_250_mA),
+	}, { /* 1080p modes */
+		.pclk = UINT_MAX,
+		.pll0 = SOR_PLL_BG_V17_S(3) | SOR_PLL_ICHPMP(1) |
+			SOR_PLL_RESISTORSEL | SOR_PLL_VCOCAP(3) |
+			SOR_PLL_TX_REG_LOAD(0),
+		.pll1 = SOR_PLL_TMDS_TERM_ENABLE | SOR_PLL_PE_EN,
+		.pe_current = PE_CURRENT0(PE_CURRENT_5_0_mA) |
+			PE_CURRENT1(PE_CURRENT_5_0_mA) |
+			PE_CURRENT2(PE_CURRENT_5_0_mA) |
+			PE_CURRENT3(PE_CURRENT_5_0_mA),
+		.drive_current = DRIVE_CURRENT_LANE0(DRIVE_CURRENT_5_250_mA) |
+			DRIVE_CURRENT_LANE1(DRIVE_CURRENT_5_250_mA) |
+			DRIVE_CURRENT_LANE2(DRIVE_CURRENT_5_250_mA) |
+			DRIVE_CURRENT_LANE3(DRIVE_CURRENT_5_250_mA),
+	},
+};
+
+static void tegra_dc_enable_controller(struct udevice *dev)
+{
+	struct tegra_dc_plat *dc_plat = dev_get_plat(dev);
+	struct dc_ctlr *dc = dc_plat->dc;
+	u32 value;
+
+	value = readl(&dc->disp.disp_win_opt);
+	value |= HDMI_ENABLE;
+	writel(value, &dc->disp.disp_win_opt);
+
+	writel(GENERAL_UPDATE, &dc->cmd.state_ctrl);
+	writel(GENERAL_ACT_REQ, &dc->cmd.state_ctrl);
+}
+
+static void tegra_hdmi_setup_tmds(struct tegra_hdmi_priv *priv,
+				  const struct tmds_config *tmds)
+{
+	struct hdmi_ctlr *hdmi = priv->hdmi_regmap;
+	u32 value;
+
+	writel(tmds->pll0, &hdmi->nv_pdisp_sor_pll0);
+	writel(tmds->pll1, &hdmi->nv_pdisp_sor_pll1);
+	writel(tmds->pe_current, &hdmi->nv_pdisp_pe_current);
+
+	writel(tmds->drive_current, &hdmi->nv_pdisp_sor_lane_drive_current);
+
+	value = readl(&hdmi->nv_pdisp_sor_lane_drive_current);
+	value |= BIT(31);
+	writel(value, &hdmi->nv_pdisp_sor_lane_drive_current);
+}
+
+static int tegra_hdmi_encoder_enable(struct udevice *dev)
+{
+	struct tegra_dc_plat *dc_plat = dev_get_plat(dev);
+	struct tegra_hdmi_priv *priv = dev_get_priv(dev);
+	struct dc_ctlr *dc = dc_plat->dc;
+	struct display_timing *dt = &priv->timing;
+	struct hdmi_ctlr *hdmi = priv->hdmi_regmap;
+	unsigned long rate, div82;
+	unsigned int pulse_start, rekey;
+	int retries = 1000;
+	u32 value;
+	int i;
+
+	/* power up sequence */
+	value = readl(&hdmi->nv_pdisp_sor_pll0);
+	value &= ~SOR_PLL_PDBG;
+	writel(value, &hdmi->nv_pdisp_sor_pll0);
+
+	udelay(20);
+
+	value = readl(&hdmi->nv_pdisp_sor_pll0);
+	value &= ~SOR_PLL_PWR;
+	writel(value, &hdmi->nv_pdisp_sor_pll0);
+
+	writel(VSYNC_H_POSITION(1), &dc->disp.disp_timing_opt);
+	writel(DITHER_CONTROL_DISABLE | BASE_COLOR_SIZE_888,
+	       &dc->disp.disp_color_ctrl);
+
+	/* video_preamble uses h_pulse2 */
+	pulse_start = 1 + dt->hsync_len.typ + dt->hback_porch.typ - 10;
+
+	writel(H_PULSE2_ENABLE, &dc->disp.disp_signal_opt0);
+
+	value = PULSE_MODE_NORMAL | PULSE_POLARITY_HIGH |
+		PULSE_QUAL_VACTIVE | PULSE_LAST_END_A;
+	writel(value, &dc->disp.h_pulse[H_PULSE2].h_pulse_ctrl);
+
+	value = PULSE_START(pulse_start) | PULSE_END(pulse_start + 8);
+	writel(value, &dc->disp.h_pulse[H_PULSE2].h_pulse_pos[H_PULSE0_POSITION_A]);
+
+	value = VSYNC_WINDOW_END(0x210) | VSYNC_WINDOW_START(0x200) |
+		VSYNC_WINDOW_ENABLE;
+	writel(value, &hdmi->nv_pdisp_hdmi_vsync_window);
+
+	if (dc_plat->pipe)
+		value = HDMI_SRC_DISPLAYB;
+	else
+		value = HDMI_SRC_DISPLAYA;
+
+	if (dt->hactive.typ == 720 && (dt->vactive.typ == 480 ||
+				       dt->vactive.typ == 576))
+		writel(value | ARM_VIDEO_RANGE_FULL,
+		       &hdmi->nv_pdisp_input_control);
+	else
+		writel(value | ARM_VIDEO_RANGE_LIMITED,
+		       &hdmi->nv_pdisp_input_control);
+
+	rate = clock_get_periph_rate(priv->clk->id, priv->clk_parent->id);
+	div82 = rate / USEC_PER_SEC * 4;
+	value = SOR_REFCLK_DIV_INT(div82 >> 2) | SOR_REFCLK_DIV_FRAC(div82);
+	writel(value, &hdmi->nv_pdisp_sor_refclk);
+
+	rekey = HDMI_REKEY_DEFAULT;
+	value = HDMI_CTRL_REKEY(rekey);
+	value |= HDMI_CTRL_MAX_AC_PACKET((dt->hsync_len.typ + dt->hback_porch.typ +
+					  dt->hfront_porch.typ - rekey - 18) / 32);
+	writel(value, &hdmi->nv_pdisp_hdmi_ctrl);
+
+	/* TMDS CONFIG */
+	for (i = 0; i < priv->config->num_tmds; i++) {
+		if (dt->pixelclock.typ <= priv->config->tmds[i].pclk) {
+			tegra_hdmi_setup_tmds(priv, &priv->config->tmds[i]);
+			break;
+		}
+	}
+
+	writel(SOR_SEQ_PU_PC(0) | SOR_SEQ_PU_PC_ALT(0) | SOR_SEQ_PD_PC(8) |
+	       SOR_SEQ_PD_PC_ALT(8), &hdmi->nv_pdisp_sor_seq_ctl);
+
+	value = SOR_SEQ_INST_WAIT_TIME(1) | SOR_SEQ_INST_WAIT_UNITS_VSYNC |
+		SOR_SEQ_INST_HALT | SOR_SEQ_INST_PIN_A_LOW |
+		SOR_SEQ_INST_PIN_B_LOW | SOR_SEQ_INST_DRIVE_PWM_OUT_LO;
+
+	writel(value, &hdmi->nv_pdisp_sor_seq_inst0);
+	writel(value, &hdmi->nv_pdisp_sor_seq_inst8);
+
+	value = readl(&hdmi->nv_pdisp_sor_cstm);
+
+	value &= ~SOR_CSTM_ROTCLK(~0);
+	value |= SOR_CSTM_ROTCLK(2);
+	value |= SOR_CSTM_PLLDIV;
+	value &= ~SOR_CSTM_LVDS_ENABLE;
+	value &= ~SOR_CSTM_MODE_MASK;
+	value |= SOR_CSTM_MODE_TMDS;
+
+	writel(value, &hdmi->nv_pdisp_sor_cstm);
+
+	/* start SOR */
+	writel(SOR_PWR_NORMAL_STATE_PU | SOR_PWR_NORMAL_START_NORMAL |
+	       SOR_PWR_SAFE_STATE_PD | SOR_PWR_SETTING_NEW_TRIGGER,
+	       &hdmi->nv_pdisp_sor_pwr);
+	writel(SOR_PWR_NORMAL_STATE_PU | SOR_PWR_NORMAL_START_NORMAL |
+	       SOR_PWR_SAFE_STATE_PD | SOR_PWR_SETTING_NEW_DONE,
+	       &hdmi->nv_pdisp_sor_pwr);
+
+	do {
+		if (--retries < 0)
+			return -ETIME;
+		value = readl(&hdmi->nv_pdisp_sor_pwr);
+	} while (value & SOR_PWR_SETTING_NEW_PENDING);
+
+	value = SOR_STATE_ASY_CRCMODE_COMPLETE |
+		SOR_STATE_ASY_OWNER_HEAD0 |
+		SOR_STATE_ASY_SUBOWNER_BOTH |
+		SOR_STATE_ASY_PROTOCOL_SINGLE_TMDS_A |
+		SOR_STATE_ASY_DEPOL_POS;
+
+	/* setup sync polarities */
+	if (dt->flags & DISPLAY_FLAGS_HSYNC_HIGH)
+		value |= SOR_STATE_ASY_HSYNCPOL_POS;
+
+	if (dt->flags & DISPLAY_FLAGS_HSYNC_LOW)
+		value |= SOR_STATE_ASY_HSYNCPOL_NEG;
+
+	if (dt->flags & DISPLAY_FLAGS_VSYNC_HIGH)
+		value |= SOR_STATE_ASY_VSYNCPOL_POS;
+
+	if (dt->flags & DISPLAY_FLAGS_VSYNC_LOW)
+		value |= SOR_STATE_ASY_VSYNCPOL_NEG;
+
+	writel(value, &hdmi->nv_pdisp_sor_state2);
+
+	value = SOR_STATE_ASY_HEAD_OPMODE_AWAKE | SOR_STATE_ASY_ORMODE_NORMAL;
+	writel(value, &hdmi->nv_pdisp_sor_state1);
+
+	writel(0, &hdmi->nv_pdisp_sor_state0);
+	writel(SOR_STATE_UPDATE, &hdmi->nv_pdisp_sor_state0);
+	writel(value | SOR_STATE_ATTACHED,
+	       &hdmi->nv_pdisp_sor_state1);
+	writel(0, &hdmi->nv_pdisp_sor_state0);
+
+	tegra_dc_enable_controller(dev);
+
+	return 0;
+}
+
+/* DDC/CI backlight control */
+static int tegra_hdmi_set_connector(struct udevice *dev, int percent)
+{
+	struct tegra_hdmi_priv *priv = dev_get_priv(dev);
+	struct udevice *ddc_entry;
+	struct i2c_msg msg[1];
+	u8 checksum = DDCCI_ENTRY_ADDR << 1;
+	int i, ret;
+
+	ret = dm_i2c_probe(priv->hdmi_ddc, DDCCI_ENTRY_ADDR, 0, &ddc_entry);
+	if (ret) {
+		log_debug("%s: cannot probe DDC/CI entry: error %d\n",
+			  __func__, ret);
+		return 0;
+	}
+
+	/*
+	 * payload[1] is length: hithest bit OR last 4 bits indicate
+	 * the number of following bytes (excluding checksum)
+	 */
+	u8 payload[7] = { DDCCI_SOURSE_ADDR, BIT(7) | (sizeof(payload) - 3),
+			  DDCCI_COMMAND_WRITE, DDCCI_CTRL_BRIGHTNESS,
+			  (u8)(percent & 0xff), (u8)(percent & 0xff), 0 };
+
+	/* DDC/CI checksum is a simple XOR of all preceding bytes */
+	for (i = 0; i < (sizeof(payload) - 1); i++)
+		checksum ^= payload[i];
+
+	payload[6] = checksum;
+
+	msg->addr = DDCCI_ENTRY_ADDR;
+	msg->flags = 0;
+	msg->len = sizeof(payload);
+	msg->buf = payload;
+
+	dm_i2c_xfer(ddc_entry, msg, 1);
+
+	return 0;
+}
+
+static int tegra_hdmi_timings(struct udevice *dev,
+			      struct display_timing *timing)
+{
+	struct tegra_hdmi_priv *priv = dev_get_priv(dev);
+
+	memcpy(timing, &priv->timing, sizeof(*timing));
+
+	return 0;
+}
+
+static void tegra_hdmi_init_clocks(struct udevice *dev)
+{
+	struct tegra_hdmi_priv *priv = dev_get_priv(dev);
+	u32 n = priv->timing.pixelclock.typ * 2 / USEC_PER_SEC;
+
+	switch (clock_get_osc_freq()) {
+	case CLOCK_OSC_FREQ_12_0: /* OSC is 12Mhz */
+	case CLOCK_OSC_FREQ_48_0: /* OSC is 48Mhz */
+		clock_set_rate(priv->clk_parent->id, n, 12, 0, 8);
+		break;
+
+	case CLOCK_OSC_FREQ_26_0: /* OSC is 26Mhz */
+		clock_set_rate(priv->clk_parent->id, n, 26, 0, 8);
+		break;
+
+	case CLOCK_OSC_FREQ_13_0: /* OSC is 13Mhz */
+	case CLOCK_OSC_FREQ_16_8: /* OSC is 16.8Mhz */
+		clock_set_rate(priv->clk_parent->id, n, 13, 0, 8);
+		break;
+
+	case CLOCK_OSC_FREQ_19_2:
+	case CLOCK_OSC_FREQ_38_4:
+	default:
+		/*
+		 * These are not supported.
+		 */
+		break;
+	}
+
+	clock_start_periph_pll(priv->clk->id, priv->clk_parent->id,
+			       priv->timing.pixelclock.typ);
+}
+
+static bool tegra_hdmi_mode_valid(void *hdmi_priv, const struct display_timing *timing)
+{
+	struct tegra_hdmi_priv *priv = hdmi_priv;
+
+	if (timing->pixelclock.typ > priv->config->max_pclk)
+		return false;
+
+	return true;
+}
+
+static int tegra_hdmi_decode_edid(struct udevice *dev)
+{
+	struct tegra_hdmi_priv *priv = dev_get_priv(dev);
+	struct udevice *hdmi_edid;
+	uchar edid_buf[EDID_SIZE] = { 0 };
+	int i, ret;
+
+	/* Poll for 1 sec in case EDID is not ready right after hpd */
+	for (i = 0; i < 10; i++) {
+		ret = dm_i2c_probe(priv->hdmi_ddc, HDMI_EDID_I2C_ADDR, 0,
+				   &hdmi_edid);
+		if (!ret)
+			break;
+
+		mdelay(100);
+	}
+	if (ret) {
+		log_debug("%s: cannot probe EDID: error %d\n",
+			  __func__, ret);
+		return ret;
+	}
+
+	ret = dm_i2c_read(hdmi_edid, 0, edid_buf, sizeof(edid_buf));
+	if (ret) {
+		log_debug("%s: cannot dump EDID buffer: error %d\n",
+			  __func__, ret);
+		return ret;
+	}
+
+	ret = edid_get_timing_validate(edid_buf, sizeof(edid_buf), &priv->timing,
+				       &priv->panel_bits_per_colourp,
+				       tegra_hdmi_mode_valid, priv);
+	if (ret) {
+		log_debug("%s: cannot decode EDID info: error %d\n",
+			  __func__, ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int tegra_hdmi_wait_hpd(struct tegra_hdmi_priv *priv)
+{
+	int i;
+
+	/* Poll 1 second for HPD signal */
+	for (i = 0; i < 10; i++) {
+		if (dm_gpio_get_value(&priv->hpd))
+			return 0;
+
+		mdelay(100);
+	}
+
+	return -ETIMEDOUT;
+}
+
+static int tegra_hdmi_probe(struct udevice *dev)
+{
+	struct tegra_hdmi_priv *priv = dev_get_priv(dev);
+	struct reset_ctl reset_ctl;
+	int i, ret;
+
+	priv->hdmi_regmap = (struct hdmi_ctlr *)dev_read_addr_ptr(dev);
+	if (!priv->hdmi_regmap) {
+		log_debug("%s: no display controller address\n", __func__);
+		return -EINVAL;
+	}
+
+	priv->config = (struct tegra_hdmi_config *)dev_get_driver_data(dev);
+
+	priv->clk = devm_clk_get(dev, NULL);
+	if (IS_ERR(priv->clk)) {
+		log_debug("%s: Could not get HDMI clock: %ld\n",
+			  __func__, PTR_ERR(priv->clk));
+		return PTR_ERR(priv->clk);
+	}
+
+	priv->clk_parent = devm_clk_get(dev, "parent");
+	if (IS_ERR(priv->clk_parent)) {
+		log_debug("%s: Could not get HDMI clock parent: %ld\n",
+			  __func__, PTR_ERR(priv->clk_parent));
+		return PTR_ERR(priv->clk_parent);
+	}
+
+	for (i = 0; i < ARRAY_SIZE(hdmi_supplies); i++) {
+		ret = device_get_supply_regulator(dev, hdmi_supplies[i],
+						  &priv->supplies[i]);
+		if (ret) {
+			log_debug("%s: cannot get %s %d\n", __func__,
+				  hdmi_supplies[i], ret);
+			if (ret != -ENOENT)
+				return log_ret(ret);
+		}
+
+		ret = regulator_set_enable_if_allowed(priv->supplies[i], true);
+		if (ret && ret != -ENOSYS) {
+			log_debug("%s: cannot enable %s: error %d\n",
+				  __func__, hdmi_supplies[i], ret);
+			return ret;
+		}
+	}
+
+	ret = reset_get_by_name(dev, "hdmi", &reset_ctl);
+	if (ret) {
+		log_debug("%s: reset_get_by_name() failed: %d\n",
+			  __func__, ret);
+		return ret;
+	}
+
+	ret = uclass_get_device_by_phandle(UCLASS_I2C, dev,
+					   "nvidia,ddc-i2c-bus",
+					   &priv->hdmi_ddc);
+	if (ret) {
+		log_debug("%s: cannot get hdmi ddc i2c bus: error %d\n",
+			  __func__, ret);
+		return ret;
+	}
+
+	ret = gpio_request_by_name(dev, "nvidia,hpd-gpio", 0,
+				   &priv->hpd, GPIOD_IS_IN);
+	if (ret) {
+		log_debug("%s: Could not decode hpd-gpios (%d)\n",
+			  __func__, ret);
+		return ret;
+	}
+
+	/* wait for connector */
+	ret = tegra_hdmi_wait_hpd(priv);
+	if (ret) {
+		/* HPD failed, use default timings */
+		memcpy(&priv->timing, &default_720p_timing,
+		       sizeof(default_720p_timing));
+	} else {
+		ret = tegra_hdmi_decode_edid(dev);
+		if (ret)
+			memcpy(&priv->timing, &default_720p_timing,
+			       sizeof(default_720p_timing));
+	}
+
+	reset_assert(&reset_ctl);
+	tegra_hdmi_init_clocks(dev);
+
+	mdelay(2);
+	reset_deassert(&reset_ctl);
+
+	return 0;
+}
+
+static const struct tegra_hdmi_config tegra20_hdmi_config = {
+	.tmds = tegra20_tmds_config,
+	.num_tmds = ARRAY_SIZE(tegra20_tmds_config),
+	.max_pclk = 148500000, /* 1080p */
+};
+
+static const struct tegra_hdmi_config tegra30_hdmi_config = {
+	.tmds = tegra30_tmds_config,
+	.num_tmds = ARRAY_SIZE(tegra30_tmds_config),
+	.max_pclk = 148500000, /* 1080p */
+};
+
+static const struct video_bridge_ops tegra_hdmi_ops = {
+	.attach			= tegra_hdmi_encoder_enable,
+	.set_backlight		= tegra_hdmi_set_connector,
+	.get_display_timing	= tegra_hdmi_timings,
+};
+
+static const struct udevice_id tegra_hdmi_ids[] = {
+	{
+		.compatible = "nvidia,tegra20-hdmi",
+		.data = (ulong)&tegra20_hdmi_config
+	}, {
+		.compatible = "nvidia,tegra30-hdmi",
+		.data = (ulong)&tegra30_hdmi_config
+	}, {
+		/* sentinel */
+	}
+};
+
+U_BOOT_DRIVER(tegra_hdmi) = {
+	.name		= "tegra_hdmi",
+	.id		= UCLASS_VIDEO_BRIDGE,
+	.of_match	= tegra_hdmi_ids,
+	.ops		= &tegra_hdmi_ops,
+	.probe		= tegra_hdmi_probe,
+	.plat_auto	= sizeof(struct tegra_dc_plat),
+	.priv_auto	= sizeof(struct tegra_hdmi_priv),
+};