drivers/video/rockchip/rk_vop.c - platform/external/u-boot - Gitiles

 /*
  * Copyright (c) 2015 Google, Inc
  * Copyright 2014 Rockchip Inc.
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */

 #include <common.h>
 #include <clk.h>
 #include <display.h>
 #include <dm.h>
 #include <edid.h>
 #include <regmap.h>
 #include <syscon.h>
 #include <video.h>
 #include <asm/gpio.h>
 #include <asm/hardware.h>
 #include <asm/io.h>
 #include <asm/arch/clock.h>
 #include <asm/arch/cru_rk3288.h>
 #include <asm/arch/grf_rk3288.h>
 #include <asm/arch/edp_rk3288.h>
 #include <asm/arch/hdmi_rk3288.h>
 #include <asm/arch/vop_rk3288.h>
 #include <dm/device-internal.h>
 #include <dm/uclass-internal.h>
 #include <dt-bindings/clock/rk3288-cru.h>
 #include <power/regulator.h>

 DECLARE_GLOBAL_DATA_PTR;

 struct rk_vop_priv {
 	struct rk3288_vop *regs;
 	struct rk3288_grf *grf;
 };

 void rkvop_enable(struct rk3288_vop *regs, ulong fbbase,
 		  int fb_bits_per_pixel, const struct display_timing *edid)
 {
 	u32 lb_mode;
 	u32 rgb_mode;
 	u32 hactive = edid->hactive.typ;
 	u32 vactive = edid->vactive.typ;

 	writel(V_ACT_WIDTH(hactive - 1) | V_ACT_HEIGHT(vactive - 1),
 	       &regs->win0_act_info);

 	writel(V_DSP_XST(edid->hsync_len.typ + edid->hback_porch.typ) |
 	       V_DSP_YST(edid->vsync_len.typ + edid->vback_porch.typ),
 	       &regs->win0_dsp_st);

 	writel(V_DSP_WIDTH(hactive - 1) |
 		V_DSP_HEIGHT(vactive - 1),
 		&regs->win0_dsp_info);

 	clrsetbits_le32(&regs->win0_color_key, M_WIN0_KEY_EN | M_WIN0_KEY_COLOR,
 			V_WIN0_KEY_EN(0) | V_WIN0_KEY_COLOR(0));

 	switch (fb_bits_per_pixel) {
 	case 16:
 		rgb_mode = RGB565;
 		writel(V_RGB565_VIRWIDTH(hactive), &regs->win0_vir);
 		break;
 	case 24:
 		rgb_mode = RGB888;
 		writel(V_RGB888_VIRWIDTH(hactive), &regs->win0_vir);
 		break;
 	case 32:
 	default:
 		rgb_mode = ARGB8888;
 		writel(V_ARGB888_VIRWIDTH(hactive), &regs->win0_vir);
 		break;
 	}

 	if (hactive > 2560)
 		lb_mode = LB_RGB_3840X2;
 	else if (hactive > 1920)
 		lb_mode = LB_RGB_2560X4;
 	else if (hactive > 1280)
 		lb_mode = LB_RGB_1920X5;
 	else
 		lb_mode = LB_RGB_1280X8;

 	clrsetbits_le32(&regs->win0_ctrl0,
 			M_WIN0_LB_MODE | M_WIN0_DATA_FMT | M_WIN0_EN,
 			V_WIN0_LB_MODE(lb_mode) | V_WIN0_DATA_FMT(rgb_mode) |
 			V_WIN0_EN(1));

 	writel(fbbase, &regs->win0_yrgb_mst);
 	writel(0x01, &regs->reg_cfg_done); /* enable reg config */
 }

 void rkvop_mode_set(struct rk3288_vop *regs,
 		    const struct display_timing *edid, enum vop_modes mode)
 {
 	u32 hactive = edid->hactive.typ;
 	u32 vactive = edid->vactive.typ;
 	u32 hsync_len = edid->hsync_len.typ;
 	u32 hback_porch = edid->hback_porch.typ;
 	u32 vsync_len = edid->vsync_len.typ;
 	u32 vback_porch = edid->vback_porch.typ;
 	u32 hfront_porch = edid->hfront_porch.typ;
 	u32 vfront_porch = edid->vfront_porch.typ;
 	uint flags;
 	int mode_flags;

 	switch (mode) {
 	case VOP_MODE_HDMI:
 		clrsetbits_le32(&regs->sys_ctrl, M_ALL_OUT_EN,
 				V_HDMI_OUT_EN(1));
 		break;
 	case VOP_MODE_EDP:
 	default:
 		clrsetbits_le32(&regs->sys_ctrl, M_ALL_OUT_EN,
 				V_EDP_OUT_EN(1));
 		break;
 	case VOP_MODE_LVDS:
 		clrsetbits_le32(&regs->sys_ctrl, M_ALL_OUT_EN,
 				V_RGB_OUT_EN(1));
 		break;
 	}

 	if (mode == VOP_MODE_HDMI || mode == VOP_MODE_EDP)
 		/* RGBaaa */
 		mode_flags = 15;
 	else
 		/* RGB888 */
 		mode_flags = 0;

 	flags = V_DSP_OUT_MODE(mode_flags) |
 		V_DSP_HSYNC_POL(!!(edid->flags & DISPLAY_FLAGS_HSYNC_HIGH)) |
 		V_DSP_VSYNC_POL(!!(edid->flags & DISPLAY_FLAGS_VSYNC_HIGH));

 	clrsetbits_le32(&regs->dsp_ctrl0,
 			M_DSP_OUT_MODE | M_DSP_VSYNC_POL | M_DSP_HSYNC_POL,
 			flags);

 	writel(V_HSYNC(hsync_len) |
 	       V_HORPRD(hsync_len + hback_porch + hactive + hfront_porch),
 			&regs->dsp_htotal_hs_end);

 	writel(V_HEAP(hsync_len + hback_porch + hactive) |
 	       V_HASP(hsync_len + hback_porch),
 	       &regs->dsp_hact_st_end);

 	writel(V_VSYNC(vsync_len) |
 	       V_VERPRD(vsync_len + vback_porch + vactive + vfront_porch),
 	       &regs->dsp_vtotal_vs_end);

 	writel(V_VAEP(vsync_len + vback_porch + vactive)|
 	       V_VASP(vsync_len + vback_porch),
 	       &regs->dsp_vact_st_end);

 	writel(V_HEAP(hsync_len + hback_porch + hactive) |
 	       V_HASP(hsync_len + hback_porch),
 	       &regs->post_dsp_hact_info);

 	writel(V_VAEP(vsync_len + vback_porch + vactive)|
 	       V_VASP(vsync_len + vback_porch),
 	       &regs->post_dsp_vact_info);

 	writel(0x01, &regs->reg_cfg_done); /* enable reg config */
 }

 /**
  * rk_display_init() - Try to enable the given display device
  *
  * This function performs many steps:
  * - Finds the display device being referenced by @ep_node
  * - Puts the VOP's ID into its uclass platform data
  * - Probes the device to set it up
  * - Reads the EDID timing information
  * - Sets up the VOP clocks, etc. for the selected pixel clock and display mode
  * - Enables the display (the display device handles this and will do different
  *     things depending on the display type)
  * - Tells the uclass about the display resolution so that the console will
  *     appear correctly
  *
  * @dev:	VOP device that we want to connect to the display
  * @fbbase:	Frame buffer address
  * @l2bpp	Log2 of bits-per-pixels for the display
  * @ep_node:	Device tree node to process - this is the offset of an endpoint
  *		node within the VOP's 'port' list.
  * @return 0 if OK, -ve if something went wrong
  */
 int rk_display_init(struct udevice *dev, ulong fbbase,
 		    enum video_log2_bpp l2bpp, int ep_node)
 {
 	struct video_priv *uc_priv = dev_get_uclass_priv(dev);
 	const void *blob = gd->fdt_blob;
 	struct rk_vop_priv *priv = dev_get_priv(dev);
 	int vop_id, remote_vop_id;
 	struct rk3288_vop *regs = priv->regs;
 	struct display_timing timing;
 	struct udevice *disp;
 	int ret, remote, i, offset;
 	struct display_plat *disp_uc_plat;
 	struct clk clk;

 	vop_id = fdtdec_get_int(blob, ep_node, "reg", -1);
 	debug("vop_id=%d\n", vop_id);
 	remote = fdtdec_lookup_phandle(blob, ep_node, "remote-endpoint");
 	if (remote < 0)
 		return -EINVAL;
 	remote_vop_id = fdtdec_get_int(blob, remote, "reg", -1);
 	debug("remote vop_id=%d\n", remote_vop_id);

 	for (i = 0, offset = remote; i < 3 && offset > 0; i++)
 		offset = fdt_parent_offset(blob, offset);
 	if (offset < 0) {
 		debug("%s: Invalid remote-endpoint position\n", dev->name);
 		return -EINVAL;
 	}

 	ret = uclass_find_device_by_of_offset(UCLASS_DISPLAY, offset, &disp);
 	if (ret) {
 		debug("%s: device '%s' display not found (ret=%d)\n", __func__,
 		      dev->name, ret);
 		return ret;
 	}

 	disp_uc_plat = dev_get_uclass_platdata(disp);
 	debug("Found device '%s', disp_uc_priv=%p\n", disp->name, disp_uc_plat);
 	if (display_in_use(disp)) {
 		debug("   - device in use\n");
 		return -EBUSY;
 	}

 	disp_uc_plat->source_id = remote_vop_id;
 	disp_uc_plat->src_dev = dev;

 	ret = device_probe(disp);
 	if (ret) {
 		debug("%s: device '%s' display won't probe (ret=%d)\n",
 		      __func__, dev->name, ret);
 		return ret;
 	}

 	ret = display_read_timing(disp, &timing);
 	if (ret) {
 		debug("%s: Failed to read timings\n", __func__);
 		return ret;
 	}

 	ret = clk_get_by_index(dev, 1, &clk);
 	if (!ret)
 		ret = clk_set_rate(&clk, timing.pixelclock.typ);
 	if (ret) {
 		debug("%s: Failed to set pixel clock: ret=%d\n", __func__, ret);
 		return ret;
 	}

 	rkvop_mode_set(regs, &timing, vop_id);

 	rkvop_enable(regs, fbbase, 1 << l2bpp, &timing);

 	ret = display_enable(disp, 1 << l2bpp, &timing);
 	if (ret)
 		return ret;

 	uc_priv->xsize = timing.hactive.typ;
 	uc_priv->ysize = timing.vactive.typ;
 	uc_priv->bpix = l2bpp;
 	debug("fb=%lx, size=%d %d\n", fbbase, uc_priv->xsize, uc_priv->ysize);

 	return 0;
 }

 static int rk_vop_probe(struct udevice *dev)
 {
 	struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);
 	const void *blob = gd->fdt_blob;
 	struct rk_vop_priv *priv = dev_get_priv(dev);
 	struct udevice *reg;
 	int ret, port, node;

 	/* Before relocation we don't need to do anything */
 	if (!(gd->flags & GD_FLG_RELOC))
 		return 0;

 	priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
 	priv->regs = (struct rk3288_vop *)dev_get_addr(dev);

 	/* lcdc(vop) iodomain select 1.8V */
 	rk_setreg(&priv->grf->io_vsel, 1 << 0);

 	/*
 	 * Try some common regulators. We should really get these from the
 	 * device tree somehow.
 	 */
 	ret = regulator_autoset_by_name("vcc18_lcd", &reg);
 	if (ret)
 		debug("%s: Cannot autoset regulator vcc18_lcd\n", __func__);
 	ret = regulator_autoset_by_name("VCC18_LCD", &reg);
 	if (ret)
 		debug("%s: Cannot autoset regulator VCC18_LCD\n", __func__);
 	ret = regulator_autoset_by_name("vdd10_lcd_pwren_h", &reg);
 	if (ret) {
 		debug("%s: Cannot autoset regulator vdd10_lcd_pwren_h\n",
 		      __func__);
 	}
 	ret = regulator_autoset_by_name("vdd10_lcd", &reg);
 	if (ret) {
 		debug("%s: Cannot autoset regulator vdd10_lcd\n",
 		      __func__);
 	}
 	ret = regulator_autoset_by_name("VDD10_LCD", &reg);
 	if (ret) {
 		debug("%s: Cannot autoset regulator VDD10_LCD\n",
 		      __func__);
 	}
 	ret = regulator_autoset_by_name("vcc33_lcd", &reg);
 	if (ret)
 		debug("%s: Cannot autoset regulator vcc33_lcd\n", __func__);

 	/*
 	 * Try all the ports until we find one that works. In practice this
 	 * tries EDP first if available, then HDMI.
 	 *
 	 * Note that rockchip_vop_set_clk() always uses NPLL as the source
 	 * clock so it is currently not possible to use more than one display
 	 * device simultaneously.
 	 */
 	port = fdt_subnode_offset(blob, dev->of_offset, "port");
 	if (port < 0)
 		return -EINVAL;
 	for (node = fdt_first_subnode(blob, port);
 	     node > 0;
 	     node = fdt_next_subnode(blob, node)) {
 		ret = rk_display_init(dev, plat->base, VIDEO_BPP16, node);
 		if (ret)
 			debug("Device failed: ret=%d\n", ret);
 		if (!ret)
 			break;
 	}
 	video_set_flush_dcache(dev, 1);

 	return ret;
 }

 static int rk_vop_bind(struct udevice *dev)
 {
 	struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);

 	plat->size = 1920 * 1080 * 2;

 	return 0;
 }

 static const struct video_ops rk_vop_ops = {
 };

 static const struct udevice_id rk_vop_ids[] = {
 	{ .compatible = "rockchip,rk3288-vop" },
 	{ }
 };

 U_BOOT_DRIVER(rk_vop) = {
 	.name	= "rk_vop",
 	.id	= UCLASS_VIDEO,
 	.of_match = rk_vop_ids,
 	.ops	= &rk_vop_ops,
 	.bind	= rk_vop_bind,
 	.probe	= rk_vop_probe,
 	.priv_auto_alloc_size	= sizeof(struct rk_vop_priv),
 };
	/*
	* Copyright (c) 2015 Google, Inc
	* Copyright 2014 Rockchip Inc.
	*
	* SPDX-License-Identifier: GPL-2.0+
	*/

	#include <common.h>
	#include <clk.h>
	#include <display.h>
	#include <dm.h>
	#include <edid.h>
	#include <regmap.h>
	#include <syscon.h>
	#include <video.h>
	#include <asm/gpio.h>
	#include <asm/hardware.h>
	#include <asm/io.h>
	#include <asm/arch/clock.h>
	#include <asm/arch/cru_rk3288.h>
	#include <asm/arch/grf_rk3288.h>
	#include <asm/arch/edp_rk3288.h>
	#include <asm/arch/hdmi_rk3288.h>
	#include <asm/arch/vop_rk3288.h>
	#include <dm/device-internal.h>
	#include <dm/uclass-internal.h>
	#include <dt-bindings/clock/rk3288-cru.h>
	#include <power/regulator.h>

	DECLARE_GLOBAL_DATA_PTR;

	struct rk_vop_priv {
	struct rk3288_vop *regs;
	struct rk3288_grf *grf;
	};

	void rkvop_enable(struct rk3288_vop *regs, ulong fbbase,
	int fb_bits_per_pixel, const struct display_timing *edid)
	{
	u32 lb_mode;
	u32 rgb_mode;
	u32 hactive = edid->hactive.typ;
	u32 vactive = edid->vactive.typ;

	writel(V_ACT_WIDTH(hactive - 1) \| V_ACT_HEIGHT(vactive - 1),
	&regs->win0_act_info);

	writel(V_DSP_XST(edid->hsync_len.typ + edid->hback_porch.typ) \|
	V_DSP_YST(edid->vsync_len.typ + edid->vback_porch.typ),
	&regs->win0_dsp_st);

	writel(V_DSP_WIDTH(hactive - 1) \|
	V_DSP_HEIGHT(vactive - 1),
	&regs->win0_dsp_info);

	clrsetbits_le32(&regs->win0_color_key, M_WIN0_KEY_EN \| M_WIN0_KEY_COLOR,
	V_WIN0_KEY_EN(0) \| V_WIN0_KEY_COLOR(0));

	switch (fb_bits_per_pixel) {
	case 16:
	rgb_mode = RGB565;
	writel(V_RGB565_VIRWIDTH(hactive), &regs->win0_vir);
	break;
	case 24:
	rgb_mode = RGB888;
	writel(V_RGB888_VIRWIDTH(hactive), &regs->win0_vir);
	break;
	case 32:
	default:
	rgb_mode = ARGB8888;
	writel(V_ARGB888_VIRWIDTH(hactive), &regs->win0_vir);
	break;
	}

	if (hactive > 2560)
	lb_mode = LB_RGB_3840X2;
	else if (hactive > 1920)
	lb_mode = LB_RGB_2560X4;
	else if (hactive > 1280)
	lb_mode = LB_RGB_1920X5;
	else
	lb_mode = LB_RGB_1280X8;

	clrsetbits_le32(&regs->win0_ctrl0,
	M_WIN0_LB_MODE \| M_WIN0_DATA_FMT \| M_WIN0_EN,
	V_WIN0_LB_MODE(lb_mode) \| V_WIN0_DATA_FMT(rgb_mode) \|
	V_WIN0_EN(1));

	writel(fbbase, &regs->win0_yrgb_mst);
	writel(0x01, &regs->reg_cfg_done); /* enable reg config */
	}

	void rkvop_mode_set(struct rk3288_vop *regs,
	const struct display_timing *edid, enum vop_modes mode)
	{
	u32 hactive = edid->hactive.typ;
	u32 vactive = edid->vactive.typ;
	u32 hsync_len = edid->hsync_len.typ;
	u32 hback_porch = edid->hback_porch.typ;
	u32 vsync_len = edid->vsync_len.typ;
	u32 vback_porch = edid->vback_porch.typ;
	u32 hfront_porch = edid->hfront_porch.typ;
	u32 vfront_porch = edid->vfront_porch.typ;
	uint flags;
	int mode_flags;

	switch (mode) {
	case VOP_MODE_HDMI:
	clrsetbits_le32(&regs->sys_ctrl, M_ALL_OUT_EN,
	V_HDMI_OUT_EN(1));
	break;
	case VOP_MODE_EDP:
	default:
	clrsetbits_le32(&regs->sys_ctrl, M_ALL_OUT_EN,
	V_EDP_OUT_EN(1));
	break;
	case VOP_MODE_LVDS:
	clrsetbits_le32(&regs->sys_ctrl, M_ALL_OUT_EN,
	V_RGB_OUT_EN(1));
	break;
	}

	if (mode == VOP_MODE_HDMI \|\| mode == VOP_MODE_EDP)
	/* RGBaaa */
	mode_flags = 15;
	else
	/* RGB888 */
	mode_flags = 0;

	flags = V_DSP_OUT_MODE(mode_flags) \|
	V_DSP_HSYNC_POL(!!(edid->flags & DISPLAY_FLAGS_HSYNC_HIGH)) \|
	V_DSP_VSYNC_POL(!!(edid->flags & DISPLAY_FLAGS_VSYNC_HIGH));

	clrsetbits_le32(&regs->dsp_ctrl0,
	M_DSP_OUT_MODE \| M_DSP_VSYNC_POL \| M_DSP_HSYNC_POL,
	flags);

	writel(V_HSYNC(hsync_len) \|
	V_HORPRD(hsync_len + hback_porch + hactive + hfront_porch),
	&regs->dsp_htotal_hs_end);

	writel(V_HEAP(hsync_len + hback_porch + hactive) \|
	V_HASP(hsync_len + hback_porch),
	&regs->dsp_hact_st_end);

	writel(V_VSYNC(vsync_len) \|
	V_VERPRD(vsync_len + vback_porch + vactive + vfront_porch),
	&regs->dsp_vtotal_vs_end);

	writel(V_VAEP(vsync_len + vback_porch + vactive)\|
	V_VASP(vsync_len + vback_porch),
	&regs->dsp_vact_st_end);

	writel(V_HEAP(hsync_len + hback_porch + hactive) \|
	V_HASP(hsync_len + hback_porch),
	&regs->post_dsp_hact_info);

	writel(V_VAEP(vsync_len + vback_porch + vactive)\|
	V_VASP(vsync_len + vback_porch),
	&regs->post_dsp_vact_info);

	writel(0x01, &regs->reg_cfg_done); /* enable reg config */
	}

	/**
	* rk_display_init() - Try to enable the given display device
	*
	* This function performs many steps:
	* - Finds the display device being referenced by @ep_node
	* - Puts the VOP's ID into its uclass platform data
	* - Probes the device to set it up
	* - Reads the EDID timing information
	* - Sets up the VOP clocks, etc. for the selected pixel clock and display mode
	* - Enables the display (the display device handles this and will do different
	* things depending on the display type)
	* - Tells the uclass about the display resolution so that the console will
	* appear correctly
	*
	* @dev: VOP device that we want to connect to the display
	* @fbbase: Frame buffer address
	* @l2bpp Log2 of bits-per-pixels for the display
	* @ep_node: Device tree node to process - this is the offset of an endpoint
	* node within the VOP's 'port' list.
	* @return 0 if OK, -ve if something went wrong
	*/
	int rk_display_init(struct udevice *dev, ulong fbbase,
	enum video_log2_bpp l2bpp, int ep_node)
	{
	struct video_priv *uc_priv = dev_get_uclass_priv(dev);
	const void *blob = gd->fdt_blob;
	struct rk_vop_priv *priv = dev_get_priv(dev);
	int vop_id, remote_vop_id;
	struct rk3288_vop *regs = priv->regs;
	struct display_timing timing;
	struct udevice *disp;
	int ret, remote, i, offset;
	struct display_plat *disp_uc_plat;
	struct clk clk;

	vop_id = fdtdec_get_int(blob, ep_node, "reg", -1);
	debug("vop_id=%d\n", vop_id);
	remote = fdtdec_lookup_phandle(blob, ep_node, "remote-endpoint");
	if (remote < 0)
	return -EINVAL;
	remote_vop_id = fdtdec_get_int(blob, remote, "reg", -1);
	debug("remote vop_id=%d\n", remote_vop_id);

	for (i = 0, offset = remote; i < 3 && offset > 0; i++)
	offset = fdt_parent_offset(blob, offset);
	if (offset < 0) {
	debug("%s: Invalid remote-endpoint position\n", dev->name);
	return -EINVAL;
	}

	ret = uclass_find_device_by_of_offset(UCLASS_DISPLAY, offset, &disp);
	if (ret) {
	debug("%s: device '%s' display not found (ret=%d)\n", __func__,
	dev->name, ret);
	return ret;
	}

	disp_uc_plat = dev_get_uclass_platdata(disp);
	debug("Found device '%s', disp_uc_priv=%p\n", disp->name, disp_uc_plat);
	if (display_in_use(disp)) {
	debug(" - device in use\n");
	return -EBUSY;
	}

	disp_uc_plat->source_id = remote_vop_id;
	disp_uc_plat->src_dev = dev;

	ret = device_probe(disp);
	if (ret) {
	debug("%s: device '%s' display won't probe (ret=%d)\n",
	__func__, dev->name, ret);
	return ret;
	}

	ret = display_read_timing(disp, &timing);
	if (ret) {
	debug("%s: Failed to read timings\n", __func__);
	return ret;
	}

	ret = clk_get_by_index(dev, 1, &clk);
	if (!ret)
	ret = clk_set_rate(&clk, timing.pixelclock.typ);
	if (ret) {
	debug("%s: Failed to set pixel clock: ret=%d\n", __func__, ret);
	return ret;
	}

	rkvop_mode_set(regs, &timing, vop_id);

	rkvop_enable(regs, fbbase, 1 << l2bpp, &timing);

	ret = display_enable(disp, 1 << l2bpp, &timing);
	if (ret)
	return ret;

	uc_priv->xsize = timing.hactive.typ;
	uc_priv->ysize = timing.vactive.typ;
	uc_priv->bpix = l2bpp;
	debug("fb=%lx, size=%d %d\n", fbbase, uc_priv->xsize, uc_priv->ysize);

	return 0;
	}

	static int rk_vop_probe(struct udevice *dev)
	{
	struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);
	const void *blob = gd->fdt_blob;
	struct rk_vop_priv *priv = dev_get_priv(dev);
	struct udevice *reg;
	int ret, port, node;

	/* Before relocation we don't need to do anything */
	if (!(gd->flags & GD_FLG_RELOC))
	return 0;

	priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
	priv->regs = (struct rk3288_vop *)dev_get_addr(dev);

	/* lcdc(vop) iodomain select 1.8V */
	rk_setreg(&priv->grf->io_vsel, 1 << 0);

	/*
	* Try some common regulators. We should really get these from the
	* device tree somehow.
	*/
	ret = regulator_autoset_by_name("vcc18_lcd", &reg);
	if (ret)
	debug("%s: Cannot autoset regulator vcc18_lcd\n", __func__);
	ret = regulator_autoset_by_name("VCC18_LCD", &reg);
	if (ret)
	debug("%s: Cannot autoset regulator VCC18_LCD\n", __func__);
	ret = regulator_autoset_by_name("vdd10_lcd_pwren_h", &reg);
	if (ret) {
	debug("%s: Cannot autoset regulator vdd10_lcd_pwren_h\n",
	__func__);
	}
	ret = regulator_autoset_by_name("vdd10_lcd", &reg);
	if (ret) {
	debug("%s: Cannot autoset regulator vdd10_lcd\n",
	__func__);
	}
	ret = regulator_autoset_by_name("VDD10_LCD", &reg);
	if (ret) {
	debug("%s: Cannot autoset regulator VDD10_LCD\n",
	__func__);
	}
	ret = regulator_autoset_by_name("vcc33_lcd", &reg);
	if (ret)
	debug("%s: Cannot autoset regulator vcc33_lcd\n", __func__);

	/*
	* Try all the ports until we find one that works. In practice this
	* tries EDP first if available, then HDMI.
	*
	* Note that rockchip_vop_set_clk() always uses NPLL as the source
	* clock so it is currently not possible to use more than one display
	* device simultaneously.
	*/
	port = fdt_subnode_offset(blob, dev->of_offset, "port");
	if (port < 0)
	return -EINVAL;
	for (node = fdt_first_subnode(blob, port);
	node > 0;
	node = fdt_next_subnode(blob, node)) {
	ret = rk_display_init(dev, plat->base, VIDEO_BPP16, node);
	if (ret)
	debug("Device failed: ret=%d\n", ret);
	if (!ret)
	break;
	}
	video_set_flush_dcache(dev, 1);

	return ret;
	}

	static int rk_vop_bind(struct udevice *dev)
	{
	struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);

	plat->size = 1920 * 1080 * 2;

	return 0;
	}

	static const struct video_ops rk_vop_ops = {
	};

	static const struct udevice_id rk_vop_ids[] = {
	{ .compatible = "rockchip,rk3288-vop" },
	{ }
	};

	U_BOOT_DRIVER(rk_vop) = {
	.name = "rk_vop",
	.id = UCLASS_VIDEO,
	.of_match = rk_vop_ids,
	.ops = &rk_vop_ops,
	.bind = rk_vop_bind,
	.probe = rk_vop_probe,
	.priv_auto_alloc_size = sizeof(struct rk_vop_priv),
	};