drivers/video/sunxi/sunxi_dw_hdmi.c - filogic/uboot - Gitiles

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * Allwinner DW HDMI bridge
  *
  * (C) Copyright 2017 Jernej Skrabec <jernej.skrabec@siol.net>
  */

 #include <common.h>
 #include <display.h>
 #include <dm.h>
 #include <dw_hdmi.h>
 #include <edid.h>
 #include <asm/io.h>
 #include <asm/arch/clock.h>
 #include <asm/arch/lcdc.h>

 struct sunxi_dw_hdmi_priv {
 	struct dw_hdmi hdmi;
 	int mux;
 };

 struct sunxi_hdmi_phy {
 	u32 pol;
 	u32 res1[3];
 	u32 read_en;
 	u32 unscramble;
 	u32 res2[2];
 	u32 ctrl;
 	u32 unk1;
 	u32 unk2;
 	u32 pll;
 	u32 clk;
 	u32 unk3;
 	u32 status;
 };

 #define HDMI_PHY_OFFS 0x10000

 static int sunxi_dw_hdmi_get_divider(uint clock)
 {
 	/*
 	 * Due to missing documentaion of HDMI PHY, we know correct
 	 * settings only for following four PHY dividers. Select one
 	 * based on clock speed.
 	 */
 	if (clock <= 27000000)
 		return 11;
 	else if (clock <= 74250000)
 		return 4;
 	else if (clock <= 148500000)
 		return 2;
 	else
 		return 1;
 }

 static void sunxi_dw_hdmi_phy_init(void)
 {
 	struct sunxi_hdmi_phy * const phy =
 		(struct sunxi_hdmi_phy *)(SUNXI_HDMI_BASE + HDMI_PHY_OFFS);
 	unsigned long tmo;
 	u32 tmp;

 	/*
 	 * HDMI PHY settings are taken as-is from Allwinner BSP code.
 	 * There is no documentation.
 	 */
 	writel(0, &phy->ctrl);
 	setbits_le32(&phy->ctrl, BIT(0));
 	udelay(5);
 	setbits_le32(&phy->ctrl, BIT(16));
 	setbits_le32(&phy->ctrl, BIT(1));
 	udelay(10);
 	setbits_le32(&phy->ctrl, BIT(2));
 	udelay(5);
 	setbits_le32(&phy->ctrl, BIT(3));
 	udelay(40);
 	setbits_le32(&phy->ctrl, BIT(19));
 	udelay(100);
 	setbits_le32(&phy->ctrl, BIT(18));
 	setbits_le32(&phy->ctrl, 7 << 4);

 	/* Note that Allwinner code doesn't fail in case of timeout */
 	tmo = timer_get_us() + 2000;
 	while ((readl(&phy->status) & 0x80) == 0) {
 		if (timer_get_us() > tmo) {
 			printf("Warning: HDMI PHY init timeout!\n");
 			break;
 		}
 	}

 	setbits_le32(&phy->ctrl, 0xf << 8);
 	setbits_le32(&phy->ctrl, BIT(7));

 	writel(0x39dc5040, &phy->pll);
 	writel(0x80084343, &phy->clk);
 	udelay(10000);
 	writel(1, &phy->unk3);
 	setbits_le32(&phy->pll, BIT(25));
 	udelay(100000);
 	tmp = (readl(&phy->status) & 0x1f800) >> 11;
 	setbits_le32(&phy->pll, BIT(31) | BIT(30));
 	setbits_le32(&phy->pll, tmp);
 	writel(0x01FF0F7F, &phy->ctrl);
 	writel(0x80639000, &phy->unk1);
 	writel(0x0F81C405, &phy->unk2);

 	/* enable read access to HDMI controller */
 	writel(0x54524545, &phy->read_en);
 	/* descramble register offsets */
 	writel(0x42494E47, &phy->unscramble);
 }

 static int sunxi_dw_hdmi_get_plug_in_status(void)
 {
 	struct sunxi_hdmi_phy * const phy =
 		(struct sunxi_hdmi_phy *)(SUNXI_HDMI_BASE + HDMI_PHY_OFFS);

 	return !!(readl(&phy->status) & (1 << 19));
 }

 static int sunxi_dw_hdmi_wait_for_hpd(void)
 {
 	ulong start;

 	start = get_timer(0);
 	do {
 		if (sunxi_dw_hdmi_get_plug_in_status())
 			return 0;
 		udelay(100);
 	} while (get_timer(start) < 300);

 	return -1;
 }

 static void sunxi_dw_hdmi_phy_set(uint clock)
 {
 	struct sunxi_hdmi_phy * const phy =
 		(struct sunxi_hdmi_phy *)(SUNXI_HDMI_BASE + HDMI_PHY_OFFS);
 	int div = sunxi_dw_hdmi_get_divider(clock);
 	u32 tmp;

 	/*
 	 * Unfortunately, we don't know much about those magic
 	 * numbers. They are taken from Allwinner BSP driver.
 	 */
 	switch (div) {
 	case 1:
 		writel(0x30dc5fc0, &phy->pll);
 		writel(0x800863C0, &phy->clk);
 		mdelay(10);
 		writel(0x00000001, &phy->unk3);
 		setbits_le32(&phy->pll, BIT(25));
 		mdelay(200);
 		tmp = (readl(&phy->status) & 0x1f800) >> 11;
 		setbits_le32(&phy->pll, BIT(31) | BIT(30));
 		if (tmp < 0x3d)
 			setbits_le32(&phy->pll, tmp + 2);
 		else
 			setbits_le32(&phy->pll, 0x3f);
 		mdelay(100);
 		writel(0x01FFFF7F, &phy->ctrl);
 		writel(0x8063b000, &phy->unk1);
 		writel(0x0F8246B5, &phy->unk2);
 		break;
 	case 2:
 		writel(0x39dc5040, &phy->pll);
 		writel(0x80084381, &phy->clk);
 		mdelay(10);
 		writel(0x00000001, &phy->unk3);
 		setbits_le32(&phy->pll, BIT(25));
 		mdelay(100);
 		tmp = (readl(&phy->status) & 0x1f800) >> 11;
 		setbits_le32(&phy->pll, BIT(31) | BIT(30));
 		setbits_le32(&phy->pll, tmp);
 		writel(0x01FFFF7F, &phy->ctrl);
 		writel(0x8063a800, &phy->unk1);
 		writel(0x0F81C485, &phy->unk2);
 		break;
 	case 4:
 		writel(0x39dc5040, &phy->pll);
 		writel(0x80084343, &phy->clk);
 		mdelay(10);
 		writel(0x00000001, &phy->unk3);
 		setbits_le32(&phy->pll, BIT(25));
 		mdelay(100);
 		tmp = (readl(&phy->status) & 0x1f800) >> 11;
 		setbits_le32(&phy->pll, BIT(31) | BIT(30));
 		setbits_le32(&phy->pll, tmp);
 		writel(0x01FFFF7F, &phy->ctrl);
 		writel(0x8063b000, &phy->unk1);
 		writel(0x0F81C405, &phy->unk2);
 		break;
 	case 11:
 		writel(0x39dc5040, &phy->pll);
 		writel(0x8008430a, &phy->clk);
 		mdelay(10);
 		writel(0x00000001, &phy->unk3);
 		setbits_le32(&phy->pll, BIT(25));
 		mdelay(100);
 		tmp = (readl(&phy->status) & 0x1f800) >> 11;
 		setbits_le32(&phy->pll, BIT(31) | BIT(30));
 		setbits_le32(&phy->pll, tmp);
 		writel(0x01FFFF7F, &phy->ctrl);
 		writel(0x8063b000, &phy->unk1);
 		writel(0x0F81C405, &phy->unk2);
 		break;
 	}
 }

 static void sunxi_dw_hdmi_pll_set(uint clk_khz)
 {
 	int value, n, m, div = 0, diff;
 	int best_n = 0, best_m = 0, best_diff = 0x0FFFFFFF;

 	div = sunxi_dw_hdmi_get_divider(clk_khz * 1000);

 	/*
 	 * Find the lowest divider resulting in a matching clock. If there
 	 * is no match, pick the closest lower clock, as monitors tend to
 	 * not sync to higher frequencies.
 	 */
 	for (m = 1; m <= 16; m++) {
 		n = (m * div * clk_khz) / 24000;

 		if ((n >= 1) && (n <= 128)) {
 			value = (24000 * n) / m / div;
 			diff = clk_khz - value;
 			if (diff < best_diff) {
 				best_diff = diff;
 				best_m = m;
 				best_n = n;
 			}
 		}
 	}

 	clock_set_pll3_factors(best_m, best_n);
 	debug("dotclock: %dkHz = %dkHz: (24MHz * %d) / %d / %d\n",
 	      clk_khz, (clock_get_pll3() / 1000) / div,
 	      best_n, best_m, div);
 }

 static void sunxi_dw_hdmi_lcdc_init(int mux, const struct display_timing *edid,
 				    int bpp)
 {
 	struct sunxi_ccm_reg * const ccm =
 		(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
 	int div = sunxi_dw_hdmi_get_divider(edid->pixelclock.typ);
 	struct sunxi_lcdc_reg *lcdc;

 	if (mux == 0) {
 		lcdc = (struct sunxi_lcdc_reg *)SUNXI_LCD0_BASE;

 		/* Reset off */
 		setbits_le32(&ccm->ahb_reset1_cfg, 1 << AHB_RESET_OFFSET_LCD0);

 		/* Clock on */
 		setbits_le32(&ccm->ahb_gate1, 1 << AHB_GATE_OFFSET_LCD0);
 		writel(CCM_LCD0_CTRL_GATE | CCM_LCD0_CTRL_M(div),
 		       &ccm->lcd0_clk_cfg);
 	} else {
 		lcdc = (struct sunxi_lcdc_reg *)SUNXI_LCD1_BASE;

 		/* Reset off */
 		setbits_le32(&ccm->ahb_reset1_cfg, 1 << AHB_RESET_OFFSET_LCD1);

 		/* Clock on */
 		setbits_le32(&ccm->ahb_gate1, 1 << AHB_GATE_OFFSET_LCD1);
 		writel(CCM_LCD1_CTRL_GATE | CCM_LCD1_CTRL_M(div),
 		       &ccm->lcd1_clk_cfg);
 	}

 	lcdc_init(lcdc);
 	lcdc_tcon1_mode_set(lcdc, edid, false, false);
 	lcdc_enable(lcdc, bpp);
 }

 static int sunxi_dw_hdmi_phy_cfg(struct dw_hdmi *hdmi, uint mpixelclock)
 {
 	sunxi_dw_hdmi_pll_set(mpixelclock/1000);
 	sunxi_dw_hdmi_phy_set(mpixelclock);

 	return 0;
 }

 static int sunxi_dw_hdmi_read_edid(struct udevice *dev, u8 *buf, int buf_size)
 {
 	struct sunxi_dw_hdmi_priv *priv = dev_get_priv(dev);

 	return dw_hdmi_read_edid(&priv->hdmi, buf, buf_size);
 }

 static int sunxi_dw_hdmi_enable(struct udevice *dev, int panel_bpp,
 				const struct display_timing *edid)
 {
 	struct sunxi_hdmi_phy * const phy =
 		(struct sunxi_hdmi_phy *)(SUNXI_HDMI_BASE + HDMI_PHY_OFFS);
 	struct sunxi_dw_hdmi_priv *priv = dev_get_priv(dev);
 	int ret;

 	ret = dw_hdmi_enable(&priv->hdmi, edid);
 	if (ret)
 		return ret;

 	sunxi_dw_hdmi_lcdc_init(priv->mux, edid, panel_bpp);

 	if (edid->flags & DISPLAY_FLAGS_VSYNC_LOW)
 		setbits_le32(&phy->pol, 0x200);

 	if (edid->flags & DISPLAY_FLAGS_HSYNC_LOW)
 		setbits_le32(&phy->pol, 0x100);

 	setbits_le32(&phy->ctrl, 0xf << 12);

 	/*
 	 * This is last hdmi access before boot, so scramble addresses
 	 * again or othwerwise BSP driver won't work. Dummy read is
 	 * needed or otherwise last write doesn't get written correctly.
 	 */
 	(void)readb(SUNXI_HDMI_BASE);
 	writel(0, &phy->unscramble);

 	return 0;
 }

 static int sunxi_dw_hdmi_probe(struct udevice *dev)
 {
 	struct display_plat *uc_plat = dev_get_uclass_platdata(dev);
 	struct sunxi_dw_hdmi_priv *priv = dev_get_priv(dev);
 	struct sunxi_ccm_reg * const ccm =
 		(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
 	int ret;

 	/* Set pll3 to 297 MHz */
 	clock_set_pll3(297000000);

 	/* Set hdmi parent to pll3 */
 	clrsetbits_le32(&ccm->hdmi_clk_cfg, CCM_HDMI_CTRL_PLL_MASK,
 			CCM_HDMI_CTRL_PLL3);

 	/* Set ahb gating to pass */
 	setbits_le32(&ccm->ahb_reset1_cfg, 1 << AHB_RESET_OFFSET_HDMI);
 	setbits_le32(&ccm->ahb_reset1_cfg, 1 << AHB_RESET_OFFSET_HDMI2);
 	setbits_le32(&ccm->ahb_gate1, 1 << AHB_GATE_OFFSET_HDMI);
 	setbits_le32(&ccm->hdmi_slow_clk_cfg, CCM_HDMI_SLOW_CTRL_DDC_GATE);

 	/* Clock on */
 	setbits_le32(&ccm->hdmi_clk_cfg, CCM_HDMI_CTRL_GATE);

 	sunxi_dw_hdmi_phy_init();

 	ret = sunxi_dw_hdmi_wait_for_hpd();
 	if (ret < 0) {
 		debug("hdmi can not get hpd signal\n");
 		return -1;
 	}

 	priv->hdmi.ioaddr = SUNXI_HDMI_BASE;
 	priv->hdmi.i2c_clk_high = 0xd8;
 	priv->hdmi.i2c_clk_low = 0xfe;
 	priv->hdmi.reg_io_width = 1;
 	priv->hdmi.phy_set = sunxi_dw_hdmi_phy_cfg;
 	priv->mux = uc_plat->source_id;

 	dw_hdmi_init(&priv->hdmi);

 	return 0;
 }

 static const struct dm_display_ops sunxi_dw_hdmi_ops = {
 	.read_edid = sunxi_dw_hdmi_read_edid,
 	.enable = sunxi_dw_hdmi_enable,
 };

 U_BOOT_DRIVER(sunxi_dw_hdmi) = {
 	.name	= "sunxi_dw_hdmi",
 	.id	= UCLASS_DISPLAY,
 	.ops	= &sunxi_dw_hdmi_ops,
 	.probe	= sunxi_dw_hdmi_probe,
 	.priv_auto_alloc_size = sizeof(struct sunxi_dw_hdmi_priv),
 };

 U_BOOT_DEVICE(sunxi_dw_hdmi) = {
 	.name = "sunxi_dw_hdmi"
 };
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* Allwinner DW HDMI bridge
	*
	* (C) Copyright 2017 Jernej Skrabec <jernej.skrabec@siol.net>
	*/

	#include <common.h>
	#include <display.h>
	#include <dm.h>
	#include <dw_hdmi.h>
	#include <edid.h>
	#include <asm/io.h>
	#include <asm/arch/clock.h>
	#include <asm/arch/lcdc.h>

	struct sunxi_dw_hdmi_priv {
	struct dw_hdmi hdmi;
	int mux;
	};

	struct sunxi_hdmi_phy {
	u32 pol;
	u32 res1[3];
	u32 read_en;
	u32 unscramble;
	u32 res2[2];
	u32 ctrl;
	u32 unk1;
	u32 unk2;
	u32 pll;
	u32 clk;
	u32 unk3;
	u32 status;
	};

	#define HDMI_PHY_OFFS 0x10000

	static int sunxi_dw_hdmi_get_divider(uint clock)
	{
	/*
	* Due to missing documentaion of HDMI PHY, we know correct
	* settings only for following four PHY dividers. Select one
	* based on clock speed.
	*/
	if (clock <= 27000000)
	return 11;
	else if (clock <= 74250000)
	return 4;
	else if (clock <= 148500000)
	return 2;
	else
	return 1;
	}

	static void sunxi_dw_hdmi_phy_init(void)
	{
	struct sunxi_hdmi_phy * const phy =
	(struct sunxi_hdmi_phy *)(SUNXI_HDMI_BASE + HDMI_PHY_OFFS);
	unsigned long tmo;
	u32 tmp;

	/*
	* HDMI PHY settings are taken as-is from Allwinner BSP code.
	* There is no documentation.
	*/
	writel(0, &phy->ctrl);
	setbits_le32(&phy->ctrl, BIT(0));
	udelay(5);
	setbits_le32(&phy->ctrl, BIT(16));
	setbits_le32(&phy->ctrl, BIT(1));
	udelay(10);
	setbits_le32(&phy->ctrl, BIT(2));
	udelay(5);
	setbits_le32(&phy->ctrl, BIT(3));
	udelay(40);
	setbits_le32(&phy->ctrl, BIT(19));
	udelay(100);
	setbits_le32(&phy->ctrl, BIT(18));
	setbits_le32(&phy->ctrl, 7 << 4);

	/* Note that Allwinner code doesn't fail in case of timeout */
	tmo = timer_get_us() + 2000;
	while ((readl(&phy->status) & 0x80) == 0) {
	if (timer_get_us() > tmo) {
	printf("Warning: HDMI PHY init timeout!\n");
	break;
	}
	}

	setbits_le32(&phy->ctrl, 0xf << 8);
	setbits_le32(&phy->ctrl, BIT(7));

	writel(0x39dc5040, &phy->pll);
	writel(0x80084343, &phy->clk);
	udelay(10000);
	writel(1, &phy->unk3);
	setbits_le32(&phy->pll, BIT(25));
	udelay(100000);
	tmp = (readl(&phy->status) & 0x1f800) >> 11;
	setbits_le32(&phy->pll, BIT(31) \| BIT(30));
	setbits_le32(&phy->pll, tmp);
	writel(0x01FF0F7F, &phy->ctrl);
	writel(0x80639000, &phy->unk1);
	writel(0x0F81C405, &phy->unk2);

	/* enable read access to HDMI controller */
	writel(0x54524545, &phy->read_en);
	/* descramble register offsets */
	writel(0x42494E47, &phy->unscramble);
	}

	static int sunxi_dw_hdmi_get_plug_in_status(void)
	{
	struct sunxi_hdmi_phy * const phy =
	(struct sunxi_hdmi_phy *)(SUNXI_HDMI_BASE + HDMI_PHY_OFFS);

	return !!(readl(&phy->status) & (1 << 19));
	}

	static int sunxi_dw_hdmi_wait_for_hpd(void)
	{
	ulong start;

	start = get_timer(0);
	do {
	if (sunxi_dw_hdmi_get_plug_in_status())
	return 0;
	udelay(100);
	} while (get_timer(start) < 300);

	return -1;
	}

	static void sunxi_dw_hdmi_phy_set(uint clock)
	{
	struct sunxi_hdmi_phy * const phy =
	(struct sunxi_hdmi_phy *)(SUNXI_HDMI_BASE + HDMI_PHY_OFFS);
	int div = sunxi_dw_hdmi_get_divider(clock);
	u32 tmp;

	/*
	* Unfortunately, we don't know much about those magic
	* numbers. They are taken from Allwinner BSP driver.
	*/
	switch (div) {
	case 1:
	writel(0x30dc5fc0, &phy->pll);
	writel(0x800863C0, &phy->clk);
	mdelay(10);
	writel(0x00000001, &phy->unk3);
	setbits_le32(&phy->pll, BIT(25));
	mdelay(200);
	tmp = (readl(&phy->status) & 0x1f800) >> 11;
	setbits_le32(&phy->pll, BIT(31) \| BIT(30));
	if (tmp < 0x3d)
	setbits_le32(&phy->pll, tmp + 2);
	else
	setbits_le32(&phy->pll, 0x3f);
	mdelay(100);
	writel(0x01FFFF7F, &phy->ctrl);
	writel(0x8063b000, &phy->unk1);
	writel(0x0F8246B5, &phy->unk2);
	break;
	case 2:
	writel(0x39dc5040, &phy->pll);
	writel(0x80084381, &phy->clk);
	mdelay(10);
	writel(0x00000001, &phy->unk3);
	setbits_le32(&phy->pll, BIT(25));
	mdelay(100);
	tmp = (readl(&phy->status) & 0x1f800) >> 11;
	setbits_le32(&phy->pll, BIT(31) \| BIT(30));
	setbits_le32(&phy->pll, tmp);
	writel(0x01FFFF7F, &phy->ctrl);
	writel(0x8063a800, &phy->unk1);
	writel(0x0F81C485, &phy->unk2);
	break;
	case 4:
	writel(0x39dc5040, &phy->pll);
	writel(0x80084343, &phy->clk);
	mdelay(10);
	writel(0x00000001, &phy->unk3);
	setbits_le32(&phy->pll, BIT(25));
	mdelay(100);
	tmp = (readl(&phy->status) & 0x1f800) >> 11;
	setbits_le32(&phy->pll, BIT(31) \| BIT(30));
	setbits_le32(&phy->pll, tmp);
	writel(0x01FFFF7F, &phy->ctrl);
	writel(0x8063b000, &phy->unk1);
	writel(0x0F81C405, &phy->unk2);
	break;
	case 11:
	writel(0x39dc5040, &phy->pll);
	writel(0x8008430a, &phy->clk);
	mdelay(10);
	writel(0x00000001, &phy->unk3);
	setbits_le32(&phy->pll, BIT(25));
	mdelay(100);
	tmp = (readl(&phy->status) & 0x1f800) >> 11;
	setbits_le32(&phy->pll, BIT(31) \| BIT(30));
	setbits_le32(&phy->pll, tmp);
	writel(0x01FFFF7F, &phy->ctrl);
	writel(0x8063b000, &phy->unk1);
	writel(0x0F81C405, &phy->unk2);
	break;
	}
	}

	static void sunxi_dw_hdmi_pll_set(uint clk_khz)
	{
	int value, n, m, div = 0, diff;
	int best_n = 0, best_m = 0, best_diff = 0x0FFFFFFF;

	div = sunxi_dw_hdmi_get_divider(clk_khz * 1000);

	/*
	* Find the lowest divider resulting in a matching clock. If there
	* is no match, pick the closest lower clock, as monitors tend to
	* not sync to higher frequencies.
	*/
	for (m = 1; m <= 16; m++) {
	n = (m * div * clk_khz) / 24000;

	if ((n >= 1) && (n <= 128)) {
	value = (24000 * n) / m / div;
	diff = clk_khz - value;
	if (diff < best_diff) {
	best_diff = diff;
	best_m = m;
	best_n = n;
	}
	}
	}

	clock_set_pll3_factors(best_m, best_n);
	debug("dotclock: %dkHz = %dkHz: (24MHz * %d) / %d / %d\n",
	clk_khz, (clock_get_pll3() / 1000) / div,
	best_n, best_m, div);
	}

	static void sunxi_dw_hdmi_lcdc_init(int mux, const struct display_timing *edid,
	int bpp)
	{
	struct sunxi_ccm_reg * const ccm =
	(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
	int div = sunxi_dw_hdmi_get_divider(edid->pixelclock.typ);
	struct sunxi_lcdc_reg *lcdc;

	if (mux == 0) {
	lcdc = (struct sunxi_lcdc_reg *)SUNXI_LCD0_BASE;

	/* Reset off */
	setbits_le32(&ccm->ahb_reset1_cfg, 1 << AHB_RESET_OFFSET_LCD0);

	/* Clock on */
	setbits_le32(&ccm->ahb_gate1, 1 << AHB_GATE_OFFSET_LCD0);
	writel(CCM_LCD0_CTRL_GATE \| CCM_LCD0_CTRL_M(div),
	&ccm->lcd0_clk_cfg);
	} else {
	lcdc = (struct sunxi_lcdc_reg *)SUNXI_LCD1_BASE;

	/* Reset off */
	setbits_le32(&ccm->ahb_reset1_cfg, 1 << AHB_RESET_OFFSET_LCD1);

	/* Clock on */
	setbits_le32(&ccm->ahb_gate1, 1 << AHB_GATE_OFFSET_LCD1);
	writel(CCM_LCD1_CTRL_GATE \| CCM_LCD1_CTRL_M(div),
	&ccm->lcd1_clk_cfg);
	}

	lcdc_init(lcdc);
	lcdc_tcon1_mode_set(lcdc, edid, false, false);
	lcdc_enable(lcdc, bpp);
	}

	static int sunxi_dw_hdmi_phy_cfg(struct dw_hdmi *hdmi, uint mpixelclock)
	{
	sunxi_dw_hdmi_pll_set(mpixelclock/1000);
	sunxi_dw_hdmi_phy_set(mpixelclock);

	return 0;
	}

	static int sunxi_dw_hdmi_read_edid(struct udevice dev, u8 buf, int buf_size)
	{
	struct sunxi_dw_hdmi_priv *priv = dev_get_priv(dev);

	return dw_hdmi_read_edid(&priv->hdmi, buf, buf_size);
	}

	static int sunxi_dw_hdmi_enable(struct udevice *dev, int panel_bpp,
	const struct display_timing *edid)
	{
	struct sunxi_hdmi_phy * const phy =
	(struct sunxi_hdmi_phy *)(SUNXI_HDMI_BASE + HDMI_PHY_OFFS);
	struct sunxi_dw_hdmi_priv *priv = dev_get_priv(dev);
	int ret;

	ret = dw_hdmi_enable(&priv->hdmi, edid);
	if (ret)
	return ret;

	sunxi_dw_hdmi_lcdc_init(priv->mux, edid, panel_bpp);

	if (edid->flags & DISPLAY_FLAGS_VSYNC_LOW)
	setbits_le32(&phy->pol, 0x200);

	if (edid->flags & DISPLAY_FLAGS_HSYNC_LOW)
	setbits_le32(&phy->pol, 0x100);

	setbits_le32(&phy->ctrl, 0xf << 12);

	/*
	* This is last hdmi access before boot, so scramble addresses
	* again or othwerwise BSP driver won't work. Dummy read is
	* needed or otherwise last write doesn't get written correctly.
	*/
	(void)readb(SUNXI_HDMI_BASE);
	writel(0, &phy->unscramble);

	return 0;
	}

	static int sunxi_dw_hdmi_probe(struct udevice *dev)
	{
	struct display_plat *uc_plat = dev_get_uclass_platdata(dev);
	struct sunxi_dw_hdmi_priv *priv = dev_get_priv(dev);
	struct sunxi_ccm_reg * const ccm =
	(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
	int ret;

	/* Set pll3 to 297 MHz */
	clock_set_pll3(297000000);

	/* Set hdmi parent to pll3 */
	clrsetbits_le32(&ccm->hdmi_clk_cfg, CCM_HDMI_CTRL_PLL_MASK,
	CCM_HDMI_CTRL_PLL3);

	/* Set ahb gating to pass */
	setbits_le32(&ccm->ahb_reset1_cfg, 1 << AHB_RESET_OFFSET_HDMI);
	setbits_le32(&ccm->ahb_reset1_cfg, 1 << AHB_RESET_OFFSET_HDMI2);
	setbits_le32(&ccm->ahb_gate1, 1 << AHB_GATE_OFFSET_HDMI);
	setbits_le32(&ccm->hdmi_slow_clk_cfg, CCM_HDMI_SLOW_CTRL_DDC_GATE);

	/* Clock on */
	setbits_le32(&ccm->hdmi_clk_cfg, CCM_HDMI_CTRL_GATE);

	sunxi_dw_hdmi_phy_init();

	ret = sunxi_dw_hdmi_wait_for_hpd();
	if (ret < 0) {
	debug("hdmi can not get hpd signal\n");
	return -1;
	}

	priv->hdmi.ioaddr = SUNXI_HDMI_BASE;
	priv->hdmi.i2c_clk_high = 0xd8;
	priv->hdmi.i2c_clk_low = 0xfe;
	priv->hdmi.reg_io_width = 1;
	priv->hdmi.phy_set = sunxi_dw_hdmi_phy_cfg;
	priv->mux = uc_plat->source_id;

	dw_hdmi_init(&priv->hdmi);

	return 0;
	}

	static const struct dm_display_ops sunxi_dw_hdmi_ops = {
	.read_edid = sunxi_dw_hdmi_read_edid,
	.enable = sunxi_dw_hdmi_enable,
	};

	U_BOOT_DRIVER(sunxi_dw_hdmi) = {
	.name = "sunxi_dw_hdmi",
	.id = UCLASS_DISPLAY,
	.ops = &sunxi_dw_hdmi_ops,
	.probe = sunxi_dw_hdmi_probe,
	.priv_auto_alloc_size = sizeof(struct sunxi_dw_hdmi_priv),
	};

	U_BOOT_DEVICE(sunxi_dw_hdmi) = {
	.name = "sunxi_dw_hdmi"
	};