[PATCH RFC v2 07/12] drm/rockchip: Add support for Rockchip Soc LVDS
Heiko Stuebner
heiko at sntech.de
Wed Apr 1 03:09:41 PDT 2015
From: Mark Yao <yzq at rock-chips.com>
This adds support for Rockchip soc lvds found on rk3288
Signed-off-by: Mark Yao <yzq at rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko at 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 at 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 at rock-chips.com>");
+MODULE_AUTHOR("Heiko Stuebner <heiko at 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 at rock-chips.com>
+ * mark yao <mark.yao at 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_ */
--
2.1.4
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