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From: Heiko Stuebner <heiko@sntech.de>
To: airlied@linux.ie, mark.yao@rock-chips.com,
	laurent.pinchart@ideasonboard.com
Subject: [PATCH RFC v2 07/12] drm/rockchip: Add support for Rockchip Soc LVDS
Date: Wed,  1 Apr 2015 12:09:41 +0200
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From: Mark Yao <yzq@rock-chips.com>

This adds support for Rockchip soc lvds found on rk3288

Signed-off-by: Mark Yao <yzq@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
---
This still needs to address Laurent's comment about trying to get the
lvds settings from the panel/connected device instead of encoding them
as separate properties in the devicetree.

 drivers/gpu/drm/rockchip/Kconfig         |   9 +
 drivers/gpu/drm/rockchip/Makefile        |   1 +
 drivers/gpu/drm/rockchip/rockchip_lvds.c | 640 +++++++++++++++++++++++++++++++
 drivers/gpu/drm/rockchip/rockchip_lvds.h | 107 ++++++
 4 files changed, 757 insertions(+)
 create mode 100644 drivers/gpu/drm/rockchip/rockchip_lvds.c
 create mode 100644 drivers/gpu/drm/rockchip/rockchip_lvds.h

diff --git a/drivers/gpu/drm/rockchip/Kconfig b/drivers/gpu/drm/rockchip/Kconfig
index 35215f6..845f953 100644
--- a/drivers/gpu/drm/rockchip/Kconfig
+++ b/drivers/gpu/drm/rockchip/Kconfig
@@ -25,3 +25,12 @@ config ROCKCHIP_DW_HDMI
 	  for the Synopsys DesignWare HDMI driver. If you want to
 	  enable HDMI on RK3288 based SoC, you should selet this
 	  option.
+
+config ROCKCHIP_LVDS
+	tristate "Rockchip lvds support"
+	depends on DRM_ROCKCHIP
+	help
+	  Choose this option to enable support for Rockchip LVDS controllers.
+	  Rockchip rk3288 SoC has LVDS TX Controller can be used, and it
+	  support lvds, rgb, dual lvds output mode. say Y to enable its
+	  driver.
diff --git a/drivers/gpu/drm/rockchip/Makefile b/drivers/gpu/drm/rockchip/Makefile
index f3d8a19..8541304 100644
--- a/drivers/gpu/drm/rockchip/Makefile
+++ b/drivers/gpu/drm/rockchip/Makefile
@@ -6,5 +6,6 @@ rockchipdrm-y := rockchip_drm_drv.o rockchip_drm_fb.o rockchip_drm_fbdev.o \
 		rockchip_drm_gem.o
 
 obj-$(CONFIG_ROCKCHIP_DW_HDMI) += dw_hdmi-rockchip.o
+obj-$(CONFIG_ROCKCHIP_LVDS) += rockchip_lvds.o
 
 obj-$(CONFIG_DRM_ROCKCHIP) += rockchipdrm.o rockchip_drm_vop.o
diff --git a/drivers/gpu/drm/rockchip/rockchip_lvds.c b/drivers/gpu/drm/rockchip/rockchip_lvds.c
new file mode 100644
index 0000000..657609e
--- /dev/null
+++ b/drivers/gpu/drm/rockchip/rockchip_lvds.c
@@ -0,0 +1,640 @@
+/*
+ * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
+ * Author:
+ *      Mark Yao <mark.yao@rock-chips.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <drm/drmP.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_dp_helper.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_of.h>
+
+#include <linux/component.h>
+#include <linux/clk.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of_graph.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/reset.h>
+
+#include <video/display_timing.h>
+
+#include "rockchip_drm_drv.h"
+#include "rockchip_drm_vop.h"
+#include "rockchip_lvds.h"
+
+#define DISPLAY_OUTPUT_RGB		0
+#define DISPLAY_OUTPUT_LVDS		1
+#define DISPLAY_OUTPUT_DUAL_LVDS	2
+
+#define connector_to_lvds(c) \
+		container_of(c, struct rockchip_lvds, connector)
+
+#define encoder_to_lvds(c) \
+		container_of(c, struct rockchip_lvds, encoder)
+
+/*
+ * @grf_offset: offset inside the grf regmap for setting the rockchip lvds
+ */
+struct rockchip_lvds_soc_data {
+	int grf_soc_con6;
+	int grf_soc_con7;
+};
+
+struct rockchip_lvds {
+	void *base;
+	struct device *dev;
+	void __iomem *regs;
+	struct regmap *grf;
+	struct clk *pclk;
+	const struct rockchip_lvds_soc_data *soc_data;
+
+	struct regulator_bulk_data supplies[3];
+
+	int output;
+	int format;
+
+	struct drm_device *drm_dev;
+	struct drm_panel *panel;
+	struct drm_connector connector;
+	struct drm_encoder encoder;
+
+	struct mutex suspend_lock;
+	int suspend;
+};
+
+static inline void lvds_writel(struct rockchip_lvds *lvds, u32 offset, u32 val)
+{
+	writel_relaxed(val, lvds->regs + offset);
+	writel_relaxed(val, lvds->regs + offset + 0x100);
+}
+
+static inline int lvds_name_to_format(const char *s)
+{
+	if (!s)
+		return -EINVAL;
+
+	if (strncmp(s, "jeida", 6) == 0)
+		return LVDS_FORMAT_JEIDA;
+	else if (strncmp(s, "vesa", 6) == 0)
+		return LVDS_FORMAT_VESA;
+
+	return -EINVAL;
+}
+
+static inline int lvds_name_to_output(const char *s)
+{
+	if (!s)
+		return -EINVAL;
+
+	if (strncmp(s, "rgb", 3) == 0)
+		return DISPLAY_OUTPUT_RGB;
+	else if (strncmp(s, "lvds", 4) == 0)
+		return DISPLAY_OUTPUT_LVDS;
+	else if (strncmp(s, "duallvds", 8) == 0)
+		return DISPLAY_OUTPUT_DUAL_LVDS;
+
+	return -EINVAL;
+}
+
+static int rockchip_lvds_poweron(struct rockchip_lvds *lvds)
+{
+	int ret;
+
+	ret = regulator_bulk_enable(ARRAY_SIZE(lvds->supplies),
+				    lvds->supplies);
+	if (ret < 0)
+		return ret;
+
+	ret = clk_enable(lvds->pclk);
+	if (ret < 0) {
+		dev_err(lvds->dev, "failed to enable lvds pclk %d\n", ret);
+		return ret;
+	}
+
+	writel(RK3288_LVDS_CFG_REGC_PLL_ENABLE,
+	       lvds->regs + RK3288_LVDS_CFG_REGC);
+	writel(RK3288_LVDS_CFG_REG21_TX_ENABLE,
+	       lvds->regs + RK3288_LVDS_CFG_REG21);
+
+	return 0;
+}
+
+static void rockchip_lvds_poweroff(struct rockchip_lvds *lvds)
+{
+	int ret;
+
+	ret = regmap_write(lvds->grf,
+			   lvds->soc_data->grf_soc_con7, 0xffff8000);
+	if (ret != 0)
+		dev_err(lvds->dev, "Could not write to GRF: %d\n", ret);
+
+	writel(RK3288_LVDS_CFG_REG21_TX_DISABLE,
+	       lvds->regs + RK3288_LVDS_CFG_REG21);
+	writel(RK3288_LVDS_CFG_REGC_PLL_DISABLE,
+	       lvds->regs + RK3288_LVDS_CFG_REGC);
+
+	clk_disable(lvds->pclk);
+
+	regulator_bulk_disable(ARRAY_SIZE(lvds->supplies),
+			       lvds->supplies);
+}
+
+static enum drm_connector_status
+rockchip_lvds_connector_detect(struct drm_connector *connector, bool force)
+{
+	return connector_status_connected;
+}
+
+static void rockchip_lvds_connector_destroy(struct drm_connector *connector)
+{
+	drm_connector_cleanup(connector);
+}
+
+static struct drm_connector_funcs rockchip_lvds_connector_funcs = {
+	.dpms = drm_helper_connector_dpms,
+	.detect = rockchip_lvds_connector_detect,
+	.fill_modes = drm_helper_probe_single_connector_modes,
+	.destroy = rockchip_lvds_connector_destroy,
+};
+
+static int rockchip_lvds_connector_get_modes(struct drm_connector *connector)
+{
+	struct rockchip_lvds *lvds = connector_to_lvds(connector);
+	struct drm_panel *panel = lvds->panel;
+
+	return panel->funcs->get_modes(panel);
+}
+
+static struct drm_encoder *
+rockchip_lvds_connector_best_encoder(struct drm_connector *connector)
+{
+	struct rockchip_lvds *lvds = connector_to_lvds(connector);
+
+	return &lvds->encoder;
+}
+
+static enum drm_mode_status rockchip_lvds_connector_mode_valid(
+		struct drm_connector *connector,
+		struct drm_display_mode *mode)
+{
+	return MODE_OK;
+}
+
+static
+struct drm_connector_helper_funcs rockchip_lvds_connector_helper_funcs = {
+	.get_modes = rockchip_lvds_connector_get_modes,
+	.mode_valid = rockchip_lvds_connector_mode_valid,
+	.best_encoder = rockchip_lvds_connector_best_encoder,
+};
+
+static void rockchip_lvds_encoder_dpms(struct drm_encoder *encoder, int mode)
+{
+	struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
+	int ret;
+
+	mutex_lock(&lvds->suspend_lock);
+
+	switch (mode) {
+	case DRM_MODE_DPMS_ON:
+		if (!lvds->suspend)
+			goto out;
+
+		drm_panel_prepare(lvds->panel);
+		ret = rockchip_lvds_poweron(lvds);
+		if (ret < 0) {
+			drm_panel_unprepare(lvds->panel);
+			return;
+		}
+		drm_panel_enable(lvds->panel);
+
+		lvds->suspend = false;
+		break;
+	case DRM_MODE_DPMS_STANDBY:
+	case DRM_MODE_DPMS_SUSPEND:
+	case DRM_MODE_DPMS_OFF:
+		if (lvds->suspend)
+			goto out;
+
+		drm_panel_disable(lvds->panel);
+		rockchip_lvds_poweroff(lvds);
+		drm_panel_unprepare(lvds->panel);
+
+		lvds->suspend = true;
+		break;
+	default:
+		break;
+	}
+
+out:
+	mutex_unlock(&lvds->suspend_lock);
+}
+
+static bool
+rockchip_lvds_encoder_mode_fixup(struct drm_encoder *encoder,
+				const struct drm_display_mode *mode,
+				struct drm_display_mode *adjusted_mode)
+{
+	return true;
+}
+
+static void rockchip_lvds_encoder_mode_set(struct drm_encoder *encoder,
+					  struct drm_display_mode *mode,
+					  struct drm_display_mode *adjusted)
+{
+	struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
+	u32 h_bp = mode->htotal - mode->hsync_start;
+	u8 pin_hsync = (mode->flags & DRM_MODE_FLAG_PHSYNC) ? 1 : 0;
+	u8 pin_dclk = (mode->flags & DRM_MODE_FLAG_PCSYNC) ? 1 : 0;
+	u32 val;
+	int ret;
+
+	val = lvds->format;
+	if (lvds->output == DISPLAY_OUTPUT_DUAL_LVDS)
+		val |= LVDS_DUAL | LVDS_CH0_EN | LVDS_CH1_EN;
+	else if (lvds->output == DISPLAY_OUTPUT_LVDS)
+		val |= LVDS_CH0_EN;
+	else if (lvds->output == DISPLAY_OUTPUT_RGB)
+		val |= LVDS_TTL_EN | LVDS_CH0_EN | LVDS_CH1_EN;
+
+	if (h_bp & 0x01)
+		val |= LVDS_START_PHASE_RST_1;
+
+	val |= (pin_dclk << 8) | (pin_hsync << 9);
+	val |= (0xffff << 16);
+	ret = regmap_write(lvds->grf, lvds->soc_data->grf_soc_con7, val);
+	if (ret != 0) {
+		dev_err(lvds->dev, "Could not write to GRF: %d\n", ret);
+		return;
+	}
+
+	if (lvds->output == DISPLAY_OUTPUT_RGB) {
+		lvds_writel(lvds, RK3288_LVDS_CH0_REG0,
+					RK3288_LVDS_CH0_REG0_TTL_EN |
+					RK3288_LVDS_CH0_REG0_LANECK_EN |
+					RK3288_LVDS_CH0_REG0_LANE4_EN |
+					RK3288_LVDS_CH0_REG0_LANE3_EN |
+					RK3288_LVDS_CH0_REG0_LANE2_EN |
+					RK3288_LVDS_CH0_REG0_LANE1_EN |
+					RK3288_LVDS_CH0_REG0_LANE0_EN);
+		lvds_writel(lvds, RK3288_LVDS_CH0_REG2,
+					RK3288_LVDS_PLL_FBDIV_REG2(0x46));
+
+		lvds_writel(lvds, RK3288_LVDS_CH0_REG3,
+					RK3288_LVDS_PLL_FBDIV_REG3(0x46));
+		lvds_writel(lvds, RK3288_LVDS_CH0_REG4,
+					RK3288_LVDS_CH0_REG4_LANECK_TTL_MODE |
+					RK3288_LVDS_CH0_REG4_LANE4_TTL_MODE |
+					RK3288_LVDS_CH0_REG4_LANE3_TTL_MODE |
+					RK3288_LVDS_CH0_REG4_LANE2_TTL_MODE |
+					RK3288_LVDS_CH0_REG4_LANE1_TTL_MODE |
+					RK3288_LVDS_CH0_REG4_LANE0_TTL_MODE);
+		lvds_writel(lvds, RK3288_LVDS_CH0_REG5,
+					RK3288_LVDS_CH0_REG5_LANECK_TTL_DATA |
+					RK3288_LVDS_CH0_REG5_LANE4_TTL_DATA |
+					RK3288_LVDS_CH0_REG5_LANE3_TTL_DATA |
+					RK3288_LVDS_CH0_REG5_LANE2_TTL_DATA |
+					RK3288_LVDS_CH0_REG5_LANE1_TTL_DATA |
+					RK3288_LVDS_CH0_REG5_LANE0_TTL_DATA);
+		lvds_writel(lvds, RK3288_LVDS_CH0_REGD,
+					RK3288_LVDS_PLL_PREDIV_REGD(0x0a));
+		lvds_writel(lvds, RK3288_LVDS_CH0_REG20,
+					RK3288_LVDS_CH0_REG20_LSB);
+	} else {
+		lvds_writel(lvds, RK3288_LVDS_CH0_REG0,
+					RK3288_LVDS_CH0_REG0_LVDS_EN |
+					RK3288_LVDS_CH0_REG0_LANECK_EN |
+					RK3288_LVDS_CH0_REG0_LANE4_EN |
+					RK3288_LVDS_CH0_REG0_LANE3_EN |
+					RK3288_LVDS_CH0_REG0_LANE2_EN |
+					RK3288_LVDS_CH0_REG0_LANE1_EN |
+					RK3288_LVDS_CH0_REG0_LANE0_EN);
+		lvds_writel(lvds, RK3288_LVDS_CH0_REG1,
+					RK3288_LVDS_CH0_REG1_LANECK_BIAS |
+					RK3288_LVDS_CH0_REG1_LANE4_BIAS |
+					RK3288_LVDS_CH0_REG1_LANE3_BIAS |
+					RK3288_LVDS_CH0_REG1_LANE2_BIAS |
+					RK3288_LVDS_CH0_REG1_LANE1_BIAS |
+					RK3288_LVDS_CH0_REG1_LANE0_BIAS);
+		lvds_writel(lvds, RK3288_LVDS_CH0_REG2,
+					RK3288_LVDS_CH0_REG2_LANECK_LVDS_MODE |
+					RK3288_LVDS_CH0_REG2_LANE4_LVDS_MODE |
+					RK3288_LVDS_CH0_REG2_LANE3_LVDS_MODE |
+					RK3288_LVDS_CH0_REG2_LANE2_LVDS_MODE |
+					RK3288_LVDS_CH0_REG2_LANE1_LVDS_MODE |
+					RK3288_LVDS_CH0_REG2_LANE0_LVDS_MODE |
+					RK3288_LVDS_PLL_FBDIV_REG2(0x46));
+		lvds_writel(lvds, RK3288_LVDS_CH0_REG3,
+					RK3288_LVDS_PLL_FBDIV_REG3(0x46));
+		lvds_writel(lvds, RK3288_LVDS_CH0_REG4, 0x00);
+		lvds_writel(lvds, RK3288_LVDS_CH0_REG5, 0x00);
+		lvds_writel(lvds, RK3288_LVDS_CH0_REGD,
+					RK3288_LVDS_PLL_PREDIV_REGD(0x0a));
+		lvds_writel(lvds, RK3288_LVDS_CH0_REG20,
+					RK3288_LVDS_CH0_REG20_LSB);
+	}
+
+	dsb();
+}
+
+static void rockchip_lvds_encoder_prepare(struct drm_encoder *encoder)
+{
+	struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
+	u32 val;
+	int ret;
+
+	ret = rockchip_drm_crtc_mode_config(encoder->crtc,
+						lvds->connector.connector_type,
+						ROCKCHIP_OUT_MODE_P888);
+	if (ret < 0) {
+		dev_err(lvds->dev, "Could not set crtc mode config: %d\n", ret);
+		return;
+	}
+
+	ret = rockchip_drm_encoder_get_mux_id(lvds->dev->of_node, encoder);
+	if (ret < 0)
+		return;
+
+	if (ret)
+		val = RK3288_LVDS_SOC_CON6_SEL_VOP_LIT |
+		      (RK3288_LVDS_SOC_CON6_SEL_VOP_LIT << 16);
+	else
+		val = RK3288_LVDS_SOC_CON6_SEL_VOP_LIT << 16;
+	ret = regmap_write(lvds->grf, lvds->soc_data->grf_soc_con6, val);
+	if (ret != 0) {
+		dev_err(lvds->dev, "Could not write to GRF: %d\n", ret);
+		return;
+	}
+}
+
+static void rockchip_lvds_encoder_commit(struct drm_encoder *encoder)
+{
+	rockchip_lvds_encoder_dpms(encoder, DRM_MODE_DPMS_ON);
+}
+
+static void rockchip_lvds_encoder_disable(struct drm_encoder *encoder)
+{
+	rockchip_lvds_encoder_dpms(encoder, DRM_MODE_DPMS_OFF);
+}
+
+static struct drm_encoder_helper_funcs rockchip_lvds_encoder_helper_funcs = {
+	.dpms = rockchip_lvds_encoder_dpms,
+	.mode_fixup = rockchip_lvds_encoder_mode_fixup,
+	.mode_set = rockchip_lvds_encoder_mode_set,
+	.prepare = rockchip_lvds_encoder_prepare,
+	.commit = rockchip_lvds_encoder_commit,
+	.disable = rockchip_lvds_encoder_disable,
+};
+
+static void rockchip_lvds_encoder_destroy(struct drm_encoder *encoder)
+{
+	drm_encoder_cleanup(encoder);
+}
+
+static struct drm_encoder_funcs rockchip_lvds_encoder_funcs = {
+	.destroy = rockchip_lvds_encoder_destroy,
+};
+
+static struct rockchip_lvds_soc_data rk3288_lvds_data = {
+	.grf_soc_con6 = 0x025c,
+	.grf_soc_con7 = 0x0260,
+};
+
+static const struct of_device_id rockchip_lvds_dt_ids[] = {
+	{
+		.compatible = "rockchip,rk3288-lvds",
+		.data = &rk3288_lvds_data
+	},
+	{}
+};
+MODULE_DEVICE_TABLE(of, rockchip_lvds_dt_ids);
+
+static int rockchip_lvds_bind(struct device *dev, struct device *master,
+			     void *data)
+{
+	struct rockchip_lvds *lvds = dev_get_drvdata(dev);
+	struct drm_device *drm_dev = data;
+	struct drm_encoder *encoder;
+	struct drm_connector *connector;
+	int ret;
+
+	lvds->drm_dev = drm_dev;
+
+	encoder = &lvds->encoder;
+	encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
+							     dev->of_node);
+
+	ret = drm_encoder_init(drm_dev, encoder, &rockchip_lvds_encoder_funcs,
+			       DRM_MODE_ENCODER_LVDS);
+	if (ret < 0) {
+		DRM_ERROR("failed to initialize encoder with drm\n");
+		return ret;
+	}
+
+	drm_encoder_helper_add(encoder, &rockchip_lvds_encoder_helper_funcs);
+
+	connector = &lvds->connector;
+	connector->dpms = DRM_MODE_DPMS_OFF;
+
+	ret = drm_connector_init(drm_dev, connector,
+				 &rockchip_lvds_connector_funcs,
+				 DRM_MODE_CONNECTOR_LVDS);
+	if (ret < 0) {
+		DRM_ERROR("failed to initialize connector with drm\n");
+		goto err_free_encoder;
+	}
+
+	drm_connector_helper_add(connector,
+				 &rockchip_lvds_connector_helper_funcs);
+
+	ret = drm_mode_connector_attach_encoder(connector, encoder);
+	if (ret < 0) {
+		DRM_ERROR("failed to attach connector and encoder\n");
+		goto err_free_connector;
+	}
+
+	ret = drm_panel_attach(lvds->panel, connector);
+	if (ret < 0) {
+		DRM_ERROR("failed to attach connector and encoder\n");
+		goto err_free_connector;
+	}
+
+	return 0;
+
+err_free_connector:
+	drm_connector_cleanup(connector);
+err_free_encoder:
+	drm_encoder_cleanup(encoder);
+	return ret;
+}
+
+static void rockchip_lvds_unbind(struct device *dev, struct device *master,
+				void *data)
+{
+	struct rockchip_lvds *lvds = dev_get_drvdata(dev);
+
+	if (lvds->panel) {
+		rockchip_lvds_encoder_dpms(&lvds->encoder, DRM_MODE_DPMS_OFF);
+
+		drm_panel_detach(lvds->panel);
+
+		drm_connector_cleanup(&lvds->connector);
+		drm_encoder_cleanup(&lvds->encoder);
+	}
+}
+static const struct component_ops rockchip_lvds_component_ops = {
+	.bind = rockchip_lvds_bind,
+	.unbind = rockchip_lvds_unbind,
+};
+
+static int rockchip_lvds_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct rockchip_lvds *lvds;
+	struct device_node *port, *output_node = NULL;
+	const struct of_device_id *match;
+	struct resource *res;
+	const char *name;
+	int i, ret;
+
+	if (!dev->of_node)
+		return -ENODEV;
+
+	lvds = devm_kzalloc(&pdev->dev, sizeof(*lvds), GFP_KERNEL);
+	if (!lvds)
+		return -ENOMEM;
+
+	lvds->dev = dev;
+	lvds->suspend = true;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	lvds->regs = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(lvds->regs))
+		return PTR_ERR(lvds->regs);
+
+	lvds->grf = syscon_regmap_lookup_by_phandle(dev->of_node,
+						    "rockchip,grf");
+	if (IS_ERR(lvds->grf)) {
+		dev_err(dev, "missing rockchip,grf property\n");
+		return PTR_ERR(lvds->grf);
+	}
+
+	lvds->supplies[0].supply = "avdd1v0";
+	lvds->supplies[1].supply = "avdd1v8";
+	lvds->supplies[2].supply = "avdd3v3";
+	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(lvds->supplies),
+				      lvds->supplies);
+	if (ret < 0)
+		return ret;
+
+	lvds->pclk = devm_clk_get(&pdev->dev, "pclk_lvds");
+	if (IS_ERR(lvds->pclk)) {
+		dev_err(dev, "could not get pclk_lvds\n");
+		return PTR_ERR(lvds->pclk);
+	}
+
+	ret = clk_prepare(lvds->pclk);
+	if (ret < 0) {
+		dev_err(dev, "failed to prepare pclk_lvds\n");
+		return ret;
+	}
+
+	match = of_match_node(rockchip_lvds_dt_ids, dev->of_node);
+	lvds->soc_data = match->data;
+
+	dev_set_drvdata(dev, lvds);
+	mutex_init(&lvds->suspend_lock);
+
+	if (of_property_read_string(dev->of_node, "rockchip,output", &name))
+		/* default set it as output rgb */
+		lvds->output = DISPLAY_OUTPUT_RGB;
+	else
+		lvds->output = lvds_name_to_output(name);
+
+	if (of_property_read_string(dev->of_node, "rockchip,data-mapping",
+				    &name))
+		/* default set it as format jeida */
+		lvds->format = LVDS_FORMAT_JEIDA;
+	else
+		lvds->format = lvds_name_to_format(name);
+
+	if (of_property_read_u32(dev->of_node, "rockchip,data-width", &i)) {
+		lvds->format |= LVDS_24BIT;
+	} else {
+		if (i == 24) {
+			lvds->format |= LVDS_24BIT;
+		} else if (i == 18) {
+			lvds->format |= LVDS_18BIT;
+		} else {
+			dev_err(&pdev->dev,
+				"rockchip-lvds unsupport data-width[%d]\n", i);
+			ret = -EINVAL;
+			goto err_unprepare_pclk;
+		}
+	}
+
+	port = of_graph_get_port_by_id(dev->of_node, 1);
+	if (port) {
+		struct device_node *endpoint;
+
+		endpoint = of_get_child_by_name(port, "endpoint");
+		if (endpoint) {
+			output_node = of_graph_get_remote_port_parent(endpoint);
+			of_node_put(endpoint);
+		}
+	}
+
+	if (!output_node) {
+		dev_err(&pdev->dev, "no output defined\n");
+		return -EINVAL;
+	}
+
+	lvds->panel = of_drm_find_panel(output_node);
+	of_node_put(output_node);
+	if (!lvds->panel) {
+		dev_err(&pdev->dev, "panel not found\n");
+		return -EPROBE_DEFER;
+	}
+
+	return component_add(&pdev->dev, &rockchip_lvds_component_ops);
+
+err_unprepare_pclk:
+	clk_unprepare(lvds->pclk);
+	return ret;
+}
+
+static int rockchip_lvds_remove(struct platform_device *pdev)
+{
+	struct rockchip_lvds *lvds = dev_get_drvdata(&pdev->dev);
+
+	component_del(&pdev->dev, &rockchip_lvds_component_ops);
+
+	clk_unprepare(lvds->pclk);
+
+	return 0;
+}
+
+struct platform_driver rockchip_lvds_driver = {
+	.probe = rockchip_lvds_probe,
+	.remove = rockchip_lvds_remove,
+	.driver = {
+		   .name = "rockchip-lvds",
+		   .of_match_table = of_match_ptr(rockchip_lvds_dt_ids),
+	},
+};
+module_platform_driver(rockchip_lvds_driver);
+
+MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
+MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>");
+MODULE_DESCRIPTION("ROCKCHIP LVDS Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/rockchip/rockchip_lvds.h b/drivers/gpu/drm/rockchip/rockchip_lvds.h
new file mode 100644
index 0000000..9b59d87
--- /dev/null
+++ b/drivers/gpu/drm/rockchip/rockchip_lvds.h
@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
+ * Author:
+ *      hjc <hjc@rock-chips.com>
+ *      mark yao <mark.yao@rock-chips.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _ROCKCHIP_LVDS_
+#define _ROCKCHIP_LVDS_
+
+#define RK3288_LVDS_CH0_REG0			0x00
+#define RK3288_LVDS_CH0_REG0_LVDS_EN		BIT(7)
+#define RK3288_LVDS_CH0_REG0_TTL_EN		BIT(6)
+#define RK3288_LVDS_CH0_REG0_LANECK_EN		BIT(5)
+#define RK3288_LVDS_CH0_REG0_LANE4_EN		BIT(4)
+#define RK3288_LVDS_CH0_REG0_LANE3_EN		BIT(3)
+#define RK3288_LVDS_CH0_REG0_LANE2_EN		BIT(2)
+#define RK3288_LVDS_CH0_REG0_LANE1_EN		BIT(1)
+#define RK3288_LVDS_CH0_REG0_LANE0_EN		BIT(0)
+
+#define RK3288_LVDS_CH0_REG1			0x04
+#define RK3288_LVDS_CH0_REG1_LANECK_BIAS	BIT(5)
+#define RK3288_LVDS_CH0_REG1_LANE4_BIAS		BIT(4)
+#define RK3288_LVDS_CH0_REG1_LANE3_BIAS		BIT(3)
+#define RK3288_LVDS_CH0_REG1_LANE2_BIAS		BIT(2)
+#define RK3288_LVDS_CH0_REG1_LANE1_BIAS		BIT(1)
+#define RK3288_LVDS_CH0_REG1_LANE0_BIAS		BIT(0)
+
+#define RK3288_LVDS_CH0_REG2			0x08
+#define RK3288_LVDS_CH0_REG2_LANECK_LVDS_MODE	BIT(6)
+#define RK3288_LVDS_CH0_REG2_LANE4_LVDS_MODE	BIT(5)
+#define RK3288_LVDS_CH0_REG2_LANE3_LVDS_MODE	BIT(4)
+#define RK3288_LVDS_CH0_REG2_LANE2_LVDS_MODE	BIT(3)
+#define RK3288_LVDS_CH0_REG2_LANE1_LVDS_MODE	BIT(2)
+#define RK3288_LVDS_CH0_REG2_LANE0_LVDS_MODE	BIT(1)
+#define RK3288_LVDS_CH0_REG2_PLL_FBDIV8		BIT(0)
+
+#define RK3288_LVDS_CH0_REG3			0x0c
+#define RK3288_LVDS_CH0_REG3_PLL_FBDIV_MASK	0xff
+
+#define RK3288_LVDS_CH0_REG4			0x10
+#define RK3288_LVDS_CH0_REG4_LANECK_TTL_MODE	BIT(5)
+#define RK3288_LVDS_CH0_REG4_LANE4_TTL_MODE	BIT(4)
+#define RK3288_LVDS_CH0_REG4_LANE3_TTL_MODE	BIT(3)
+#define RK3288_LVDS_CH0_REG4_LANE2_TTL_MODE	BIT(2)
+#define RK3288_LVDS_CH0_REG4_LANE1_TTL_MODE	BIT(1)
+#define RK3288_LVDS_CH0_REG4_LANE0_TTL_MODE	BIT(0)
+
+#define RK3288_LVDS_CH0_REG5			0x14
+#define RK3288_LVDS_CH0_REG5_LANECK_TTL_DATA	BIT(5)
+#define RK3288_LVDS_CH0_REG5_LANE4_TTL_DATA	BIT(4)
+#define RK3288_LVDS_CH0_REG5_LANE3_TTL_DATA	BIT(3)
+#define RK3288_LVDS_CH0_REG5_LANE2_TTL_DATA	BIT(2)
+#define RK3288_LVDS_CH0_REG5_LANE1_TTL_DATA	BIT(1)
+#define RK3288_LVDS_CH0_REG5_LANE0_TTL_DATA	BIT(0)
+
+#define RK3288_LVDS_CFG_REGC			0x30
+#define RK3288_LVDS_CFG_REGC_PLL_ENABLE		0x00
+#define RK3288_LVDS_CFG_REGC_PLL_DISABLE	0xff
+
+#define RK3288_LVDS_CH0_REGD			0x34
+#define RK3288_LVDS_CH0_REGD_PLL_PREDIV_MASK	0x1f
+
+#define RK3288_LVDS_CH0_REG20			0x80
+#define RK3288_LVDS_CH0_REG20_MSB		0x45
+#define RK3288_LVDS_CH0_REG20_LSB		0x44
+
+#define RK3288_LVDS_CFG_REG21			0x84
+#define RK3288_LVDS_CFG_REG21_TX_ENABLE		0x92
+#define RK3288_LVDS_CFG_REG21_TX_DISABLE	0x00
+
+/* fbdiv value is split over 2 registers, with bit8 in reg2 */
+#define RK3288_LVDS_PLL_FBDIV_REG2(_fbd) \
+		(_fbd & BIT(8) ? RK3288_LVDS_CH0_REG2_PLL_FBDIV8 : 0)
+#define RK3288_LVDS_PLL_FBDIV_REG3(_fbd) \
+		(_fbd & RK3288_LVDS_CH0_REG3_PLL_FBDIV_MASK)
+#define RK3288_LVDS_PLL_PREDIV_REGD(_pd) \
+		(_pd & RK3288_LVDS_CH0_REGD_PLL_PREDIV_MASK)
+
+#define RK3288_LVDS_SOC_CON6_SEL_VOP_LIT	BIT(3)
+
+#define LVDS_FMT_MASK			(0x07 << 16)
+#define LVDS_MSB			(0x01 << 3)
+#define LVDS_DUAL			(0x01 << 4)
+#define LVDS_FMT_1			(0x01 << 5)
+#define LVDS_TTL_EN			(0x01 << 6)
+#define LVDS_START_PHASE_RST_1		(0x01 << 7)
+#define LVDS_DCLK_INV			(0x01 << 8)
+#define LVDS_CH0_EN			(0x01 << 11)
+#define LVDS_CH1_EN			(0x01 << 12)
+#define LVDS_PWRDN			(0x01 << 15)
+
+#define LVDS_24BIT		(0 << 1)
+#define LVDS_18BIT		(1 << 1)
+#define LVDS_FORMAT_VESA	(0 << 0)
+#define LVDS_FORMAT_JEIDA	(1 << 0)
+
+#endif /* _ROCKCHIP_LVDS_ */