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Subject[PATCH v8 3/3] drm/rockchip: Add support for Rockchip Soc LVDS
Date
This adds support for Rockchip soc lvds found on rk3288
Based on the patches from Mark yao and Heiko Stuebner.

Signed-off-by: Mark Yao <mark.yao@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Sandy Huang <hjc@rock-chips.com>
---
Change the Signed-off order

drivers/gpu/drm/rockchip/Kconfig | 8 +
drivers/gpu/drm/rockchip/Makefile | 1 +
drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 2 +
drivers/gpu/drm/rockchip/rockchip_drm_drv.h | 1 +
drivers/gpu/drm/rockchip/rockchip_lvds.c | 582 ++++++++++++++++++++++++++++
drivers/gpu/drm/rockchip/rockchip_lvds.h | 114 ++++++
6 files changed, 708 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 dcc539b..0c31f0a 100644
--- a/drivers/gpu/drm/rockchip/Kconfig
+++ b/drivers/gpu/drm/rockchip/Kconfig
@@ -57,4 +57,12 @@ config ROCKCHIP_INNO_HDMI
for the Innosilicon HDMI driver. If you want to enable
HDMI on RK3036 based SoC, you should select this option.

+config ROCKCHIP_LVDS
+ bool "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.
endif
diff --git a/drivers/gpu/drm/rockchip/Makefile b/drivers/gpu/drm/rockchip/Makefile
index fa8dc9d..a881d2c 100644
--- a/drivers/gpu/drm/rockchip/Makefile
+++ b/drivers/gpu/drm/rockchip/Makefile
@@ -12,5 +12,6 @@ rockchipdrm-$(CONFIG_ROCKCHIP_CDN_DP) += cdn-dp-core.o cdn-dp-reg.o
rockchipdrm-$(CONFIG_ROCKCHIP_DW_HDMI) += dw_hdmi-rockchip.o
rockchipdrm-$(CONFIG_ROCKCHIP_DW_MIPI_DSI) += dw-mipi-dsi.o
rockchipdrm-$(CONFIG_ROCKCHIP_INNO_HDMI) += inno_hdmi.o
+rockchipdrm-$(CONFIG_ROCKCHIP_LVDS) += rockchip_lvds.o

obj-$(CONFIG_DRM_ROCKCHIP) += rockchipdrm.o
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
index c41f48a..082c251 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
@@ -445,6 +445,8 @@ static int __init rockchip_drm_init(void)

num_rockchip_sub_drivers = 0;
ADD_ROCKCHIP_SUB_DRIVER(vop_platform_driver, CONFIG_DRM_ROCKCHIP);
+ ADD_ROCKCHIP_SUB_DRIVER(rockchip_lvds_driver,
+ CONFIG_ROCKCHIP_LVDS);
ADD_ROCKCHIP_SUB_DRIVER(rockchip_dp_driver,
CONFIG_ROCKCHIP_ANALOGIX_DP);
ADD_ROCKCHIP_SUB_DRIVER(cdn_dp_driver, CONFIG_ROCKCHIP_CDN_DP);
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
index c7e96b8..498dfbc 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
@@ -69,5 +69,6 @@ extern struct platform_driver dw_hdmi_rockchip_pltfm_driver;
extern struct platform_driver dw_mipi_dsi_driver;
extern struct platform_driver inno_hdmi_driver;
extern struct platform_driver rockchip_dp_driver;
+extern struct platform_driver rockchip_lvds_driver;
extern struct platform_driver vop_platform_driver;
#endif /* _ROCKCHIP_DRM_DRV_H_ */
diff --git a/drivers/gpu/drm/rockchip/rockchip_lvds.c b/drivers/gpu/drm/rockchip/rockchip_lvds.c
new file mode 100644
index 0000000..86d9a8c
--- /dev/null
+++ b/drivers/gpu/drm/rockchip/rockchip_lvds.c
@@ -0,0 +1,582 @@
+/*
+ * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
+ * Author:
+ * Mark Yao <mark.yao@rock-chips.com>
+ * Sandy Huang <hjc@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_atomic_helper.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/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/reset.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)
+
+/**
+ * rockchip_lvds_soc_data - rockchip lvds Soc private data
+ * @ch1_offset: lvds channel 1 registe offset
+ * grf_soc_con6: general registe offset for LVDS contrl
+ * grf_soc_con7: general registe offset for LVDS contrl
+ * has_vop_sel: to indicate whether need to choose from different VOP.
+ */
+struct rockchip_lvds_soc_data {
+ u32 ch1_offset;
+ int grf_soc_con6;
+ int grf_soc_con7;
+ bool has_vop_sel;
+};
+
+struct rockchip_lvds {
+ struct device *dev;
+ void __iomem *regs;
+ struct regmap *grf;
+ struct clk *pclk;
+ const struct rockchip_lvds_soc_data *soc_data;
+ int output; /* rgb lvds or dual lvds output */
+ int format; /* vesa or jeida format */
+ struct drm_device *drm_dev;
+ struct drm_panel *panel;
+ struct drm_bridge *bridge;
+ struct drm_connector connector;
+ struct drm_encoder encoder;
+ struct dev_pin_info *pins;
+};
+
+static inline void lvds_writel(struct rockchip_lvds *lvds, u32 offset, u32 val)
+{
+ writel_relaxed(val, lvds->regs + offset);
+ if (lvds->output == DISPLAY_OUTPUT_LVDS)
+ return;
+ writel_relaxed(val, lvds->regs + offset + lvds->soc_data->ch1_offset);
+}
+
+static inline int lvds_name_to_format(const char *s)
+{
+ if (strncmp(s, "jeida-18", 8) == 0)
+ return LVDS_JEIDA_18;
+ else if (strncmp(s, "jeida-24", 8) == 0)
+ return LVDS_JEIDA_24;
+ else if (strncmp(s, "vesa-24", 7) == 0)
+ return LVDS_VESA_24;
+
+ return -EINVAL;
+}
+
+static inline int lvds_name_to_output(const char *s)
+{
+ 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;
+ u32 val;
+
+ ret = clk_enable(lvds->pclk);
+ if (ret < 0) {
+ DRM_DEV_ERROR(lvds->dev, "failed to enable lvds pclk %d\n", ret);
+ return ret;
+ }
+ ret = pm_runtime_get_sync(lvds->dev);
+ if (ret < 0) {
+ DRM_DEV_ERROR(lvds->dev, "failed to get pm runtime: %d\n", ret);
+ clk_disable(lvds->pclk);
+ return ret;
+ }
+ val = 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;
+ if (lvds->output == DISPLAY_OUTPUT_RGB) {
+ val |= RK3288_LVDS_CH0_REG0_TTL_EN |
+ RK3288_LVDS_CH0_REG0_LANECK_EN;
+ lvds_writel(lvds, RK3288_LVDS_CH0_REG0, val);
+ lvds_writel(lvds, RK3288_LVDS_CH0_REG2,
+ RK3288_LVDS_PLL_FBDIV_REG2(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);
+ } else {
+ val |= RK3288_LVDS_CH0_REG0_LVDS_EN |
+ RK3288_LVDS_CH0_REG0_LANECK_EN;
+ lvds_writel(lvds, RK3288_LVDS_CH0_REG0, val);
+ 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_RESERVE_ON |
+ 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_REG4, 0x00);
+ lvds_writel(lvds, RK3288_LVDS_CH0_REG5, 0x00);
+ }
+ lvds_writel(lvds, RK3288_LVDS_CH0_REG3, RK3288_LVDS_PLL_FBDIV_REG3(0x46));
+ 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);
+
+ lvds_writel(lvds, RK3288_LVDS_CFG_REGC, RK3288_LVDS_CFG_REGC_PLL_ENABLE);
+ lvds_writel(lvds, RK3288_LVDS_CFG_REG21, RK3288_LVDS_CFG_REG21_TX_ENABLE);
+
+ return 0;
+}
+
+static void rockchip_lvds_poweroff(struct rockchip_lvds *lvds)
+{
+ int ret;
+ u32 val;
+
+ lvds_writel(lvds, RK3288_LVDS_CFG_REG21, RK3288_LVDS_CFG_REG21_TX_ENABLE);
+ lvds_writel(lvds, RK3288_LVDS_CFG_REGC, RK3288_LVDS_CFG_REGC_PLL_ENABLE);
+ val = LVDS_DUAL | LVDS_TTL_EN | LVDS_CH0_EN | LVDS_CH1_EN | LVDS_PWRDN;
+ val |= val << 16;
+ ret = regmap_write(lvds->grf, lvds->soc_data->grf_soc_con7, val);
+ if (ret != 0)
+ DRM_DEV_ERROR(lvds->dev, "Could not write to GRF: %d\n", ret);
+
+ pm_runtime_put(lvds->dev);
+ clk_disable(lvds->pclk);
+}
+
+static const struct drm_connector_funcs rockchip_lvds_connector_funcs = {
+ .dpms = drm_atomic_helper_connector_dpms,
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .destroy = drm_connector_cleanup,
+ .reset = drm_atomic_helper_connector_reset,
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+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 drm_panel_get_modes(panel);
+}
+
+static const
+struct drm_connector_helper_funcs rockchip_lvds_connector_helper_funcs = {
+ .get_modes = rockchip_lvds_connector_get_modes,
+};
+
+static void rockchip_lvds_grf_config(struct drm_encoder *encoder,
+ struct drm_display_mode *mode)
+{
+ struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
+ 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;
+
+ /* iomux to LCD data/sync mode */
+ if (lvds->output == DISPLAY_OUTPUT_RGB)
+ if (lvds->pins && !IS_ERR(lvds->pins->default_state))
+ pinctrl_select_state(lvds->pins->p,
+ lvds->pins->default_state);
+ val = lvds->format | LVDS_CH0_EN;
+ if (lvds->output == DISPLAY_OUTPUT_RGB)
+ val |= LVDS_TTL_EN | LVDS_CH1_EN;
+ else if (lvds->output == DISPLAY_OUTPUT_DUAL_LVDS)
+ val |= LVDS_DUAL | LVDS_CH1_EN;
+
+ if ((mode->htotal - mode->hsync_start) & 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) {
+ DRM_DEV_ERROR(lvds->dev, "Could not write to GRF: %d\n", ret);
+ return;
+ }
+}
+
+static int rockchip_lvds_set_vop_source(struct rockchip_lvds *lvds,
+ struct drm_encoder *encoder)
+{
+ u32 val;
+ int ret;
+
+ if (!lvds->soc_data->has_vop_sel)
+ return 0;
+
+ ret = drm_of_encoder_active_endpoint_id(lvds->dev->of_node, encoder);
+ if (ret < 0)
+ return ret;
+
+ val = RK3288_LVDS_SOC_CON6_SEL_VOP_LIT << 16;
+ if (ret)
+ val |= RK3288_LVDS_SOC_CON6_SEL_VOP_LIT;
+
+ ret = regmap_write(lvds->grf, lvds->soc_data->grf_soc_con6, val);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int
+rockchip_lvds_encoder_atomic_check(struct drm_encoder *encoder,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state)
+{
+ struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
+
+ s->output_mode = ROCKCHIP_OUT_MODE_P888;
+ s->output_type = DRM_MODE_CONNECTOR_LVDS;
+
+ return 0;
+}
+
+static void rockchip_lvds_encoder_enable(struct drm_encoder *encoder)
+{
+ struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
+ struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
+ int ret;
+
+ drm_panel_prepare(lvds->panel);
+ ret = rockchip_lvds_poweron(lvds);
+ if (ret < 0) {
+ DRM_DEV_ERROR(lvds->dev, "failed to power on lvds: %d\n", ret);
+ drm_panel_unprepare(lvds->panel);
+ }
+ rockchip_lvds_grf_config(encoder, mode);
+ rockchip_lvds_set_vop_source(lvds, encoder);
+ drm_panel_enable(lvds->panel);
+}
+
+static void rockchip_lvds_encoder_disable(struct drm_encoder *encoder)
+{
+ struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
+
+ drm_panel_disable(lvds->panel);
+ rockchip_lvds_poweroff(lvds);
+ drm_panel_unprepare(lvds->panel);
+}
+
+static const
+struct drm_encoder_helper_funcs rockchip_lvds_encoder_helper_funcs = {
+ .enable = rockchip_lvds_encoder_enable,
+ .disable = rockchip_lvds_encoder_disable,
+ .atomic_check = rockchip_lvds_encoder_atomic_check,
+};
+
+static const struct drm_encoder_funcs rockchip_lvds_encoder_funcs = {
+ .destroy = drm_encoder_cleanup,
+};
+
+static const struct rockchip_lvds_soc_data rk3288_lvds_data = {
+ .ch1_offset = 0x100,
+ .grf_soc_con6 = 0x025c,
+ .grf_soc_con7 = 0x0260,
+ .has_vop_sel = true,
+};
+
+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;
+ struct device_node *remote = NULL;
+ struct device_node *port, *endpoint;
+ int ret;
+ const char *name;
+ u32 endpoint_id;
+
+ lvds->drm_dev = drm_dev;
+ port = of_graph_get_port_by_id(dev->of_node, 1);
+ if (!port) {
+ DRM_DEV_ERROR(dev,
+ "can't found port point, please init lvds panel port!\n");
+ return -EINVAL;
+ }
+ for_each_child_of_node(port, endpoint) {
+ of_property_read_u32(endpoint, "reg", &endpoint_id);
+ ret = drm_of_find_panel_or_bridge(dev->of_node, 1, endpoint_id,
+ &lvds->panel, &lvds->bridge);
+ if (!ret)
+ break;
+ }
+ if (ret) {
+ DRM_DEV_ERROR(dev, "failed to find panel and bridge node\n");
+ ret = -EPROBE_DEFER;
+ goto err_put_port;
+ }
+ if (lvds->panel)
+ remote = lvds->panel->dev->of_node;
+ else
+ remote = lvds->bridge->of_node;
+ 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 (lvds->output < 0) {
+ DRM_DEV_ERROR(dev, "invalid output type [%s]\n", name);
+ ret = lvds->output;
+ goto err_put_remote;
+ }
+
+ if (of_property_read_string(remote, "data-mapping", &name))
+ /* default set it as format vesa 18 */
+ lvds->format = LVDS_VESA_18;
+ else
+ lvds->format = lvds_name_to_format(name);
+
+ if (lvds->format < 0) {
+ DRM_DEV_ERROR(dev, "invalid data-mapping format [%s]\n", name);
+ ret = lvds->format;
+ goto err_put_remote;
+ }
+
+ 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, NULL);
+ if (ret < 0) {
+ DRM_DEV_ERROR(drm_dev->dev,
+ "failed to initialize encoder: %d\n", ret);
+ goto err_put_remote;
+ }
+
+ drm_encoder_helper_add(encoder, &rockchip_lvds_encoder_helper_funcs);
+
+ if (lvds->panel) {
+ 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_DEV_ERROR(drm_dev->dev,
+ "failed to initialize connector: %d\n", ret);
+ 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_DEV_ERROR(drm_dev->dev,
+ "failed to attach encoder: %d\n", ret);
+ goto err_free_connector;
+ }
+
+ ret = drm_panel_attach(lvds->panel, connector);
+ if (ret < 0) {
+ DRM_DEV_ERROR(drm_dev->dev,
+ "failed to attach panel: %d\n", ret);
+ goto err_free_connector;
+ }
+ } else {
+ lvds->bridge->encoder = encoder;
+ ret = drm_bridge_attach(encoder, lvds->bridge, NULL);
+ if (ret) {
+ DRM_DEV_ERROR(drm_dev->dev,
+ "failed to attach bridge: %d\n", ret);
+ goto err_free_encoder;
+ }
+ encoder->bridge = lvds->bridge;
+ }
+
+ pm_runtime_enable(dev);
+ of_node_put(remote);
+ of_node_put(port);
+
+ return 0;
+
+err_free_connector:
+ drm_connector_cleanup(connector);
+err_free_encoder:
+ drm_encoder_cleanup(encoder);
+err_put_remote:
+ of_node_put(remote);
+err_put_port:
+ of_node_put(port);
+
+ return ret;
+}
+
+static void rockchip_lvds_unbind(struct device *dev, struct device *master,
+ void *data)
+{
+ struct rockchip_lvds *lvds = dev_get_drvdata(dev);
+
+ rockchip_lvds_encoder_disable(&lvds->encoder);
+ if (lvds->panel)
+ drm_panel_detach(lvds->panel);
+ pm_runtime_disable(dev);
+ 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;
+ const struct of_device_id *match;
+ struct resource *res;
+ int ret;
+
+ if (!dev->of_node)
+ return -ENODEV;
+
+ lvds = devm_kzalloc(&pdev->dev, sizeof(*lvds), GFP_KERNEL);
+ if (!lvds)
+ return -ENOMEM;
+
+ lvds->dev = dev;
+ match = of_match_node(rockchip_lvds_dt_ids, dev->of_node);
+ if (!match)
+ return -ENODEV;
+ lvds->soc_data = match->data;
+
+ 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->pclk = devm_clk_get(&pdev->dev, "pclk_lvds");
+ if (IS_ERR(lvds->pclk)) {
+ DRM_DEV_ERROR(dev, "could not get pclk_lvds\n");
+ return PTR_ERR(lvds->pclk);
+ }
+
+ lvds->pins = devm_kzalloc(lvds->dev, sizeof(*lvds->pins),
+ GFP_KERNEL);
+ if (!lvds->pins)
+ return -ENOMEM;
+
+ lvds->pins->p = devm_pinctrl_get(lvds->dev);
+ if (IS_ERR(lvds->pins->p)) {
+ DRM_DEV_ERROR(dev, "no pinctrl handle\n");
+ devm_kfree(lvds->dev, lvds->pins);
+ lvds->pins = NULL;
+ } else {
+ lvds->pins->default_state =
+ pinctrl_lookup_state(lvds->pins->p, "lcdc");
+ if (IS_ERR(lvds->pins->default_state)) {
+ DRM_DEV_ERROR(dev, "no default pinctrl state\n");
+ devm_kfree(lvds->dev, lvds->pins);
+ lvds->pins = NULL;
+ }
+ }
+
+ lvds->grf = syscon_regmap_lookup_by_phandle(dev->of_node,
+ "rockchip,grf");
+ if (IS_ERR(lvds->grf)) {
+ DRM_DEV_ERROR(dev, "missing rockchip,grf property\n");
+ return PTR_ERR(lvds->grf);
+ }
+
+ dev_set_drvdata(dev, lvds);
+
+ ret = clk_prepare(lvds->pclk);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "failed to prepare pclk_lvds\n");
+ return ret;
+ }
+ ret = component_add(&pdev->dev, &rockchip_lvds_component_ops);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "failed to add component\n");
+ 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),
+ },
+};
diff --git a/drivers/gpu/drm/rockchip/rockchip_lvds.h b/drivers/gpu/drm/rockchip/rockchip_lvds.h
new file mode 100644
index 0000000..15810b7
--- /dev/null
+++ b/drivers/gpu/drm/rockchip/rockchip_lvds.h
@@ -0,0 +1,114 @@
+/*
+ * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
+ * Author:
+ * Sandy Huang <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_RESERVE_ON BIT(7)
+#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
+#define RK3288_LVDS_CH1_OFFSET 0x100
+
+/* 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 BIT(3)
+#define LVDS_DUAL BIT(4)
+#define LVDS_FMT_1 BIT(5)
+#define LVDS_TTL_EN BIT(6)
+#define LVDS_START_PHASE_RST_1 BIT(7)
+#define LVDS_DCLK_INV BIT(8)
+#define LVDS_CH0_EN BIT(11)
+#define LVDS_CH1_EN BIT(12)
+#define LVDS_PWRDN BIT(15)
+
+#define LVDS_24BIT (0 << 1)
+#define LVDS_18BIT (1 << 1)
+#define LVDS_FORMAT_VESA (0 << 0)
+#define LVDS_FORMAT_JEIDA (1 << 0)
+
+#define LVDS_VESA_24 0
+#define LVDS_JEIDA_24 1
+#define LVDS_VESA_18 2
+#define LVDS_JEIDA_18 3
+
+#endif /* _ROCKCHIP_LVDS_ */
--
2.7.4

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