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0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
0004  * Author:
0005  *      Mark Yao <mark.yao@rock-chips.com>
0006  *      Sandy Huang <hjc@rock-chips.com>
0007  */
0008 
0009 #include <linux/clk.h>
0010 #include <linux/component.h>
0011 #include <linux/mfd/syscon.h>
0012 #include <linux/of_graph.h>
0013 #include <linux/phy/phy.h>
0014 #include <linux/pinctrl/devinfo.h>
0015 #include <linux/platform_device.h>
0016 #include <linux/pm_runtime.h>
0017 #include <linux/regmap.h>
0018 #include <linux/reset.h>
0019 
0020 #include <drm/display/drm_dp_helper.h>
0021 #include <drm/drm_atomic_helper.h>
0022 #include <drm/drm_bridge.h>
0023 #include <drm/drm_bridge_connector.h>
0024 #include <drm/drm_of.h>
0025 #include <drm/drm_panel.h>
0026 #include <drm/drm_probe_helper.h>
0027 #include <drm/drm_simple_kms_helper.h>
0028 
0029 #include "rockchip_drm_drv.h"
0030 #include "rockchip_drm_vop.h"
0031 #include "rockchip_lvds.h"
0032 
0033 #define DISPLAY_OUTPUT_RGB      0
0034 #define DISPLAY_OUTPUT_LVDS     1
0035 #define DISPLAY_OUTPUT_DUAL_LVDS    2
0036 
0037 struct rockchip_lvds;
0038 
0039 /**
0040  * struct rockchip_lvds_soc_data - rockchip lvds Soc private data
0041  * @probe: LVDS platform probe function
0042  * @helper_funcs: LVDS connector helper functions
0043  */
0044 struct rockchip_lvds_soc_data {
0045     int (*probe)(struct platform_device *pdev, struct rockchip_lvds *lvds);
0046     const struct drm_encoder_helper_funcs *helper_funcs;
0047 };
0048 
0049 struct rockchip_lvds {
0050     struct device *dev;
0051     void __iomem *regs;
0052     struct regmap *grf;
0053     struct clk *pclk;
0054     struct phy *dphy;
0055     const struct rockchip_lvds_soc_data *soc_data;
0056     int output; /* rgb lvds or dual lvds output */
0057     int format; /* vesa or jeida format */
0058     struct drm_device *drm_dev;
0059     struct drm_panel *panel;
0060     struct drm_bridge *bridge;
0061     struct drm_connector connector;
0062     struct rockchip_encoder encoder;
0063     struct dev_pin_info *pins;
0064 };
0065 
0066 static inline struct rockchip_lvds *connector_to_lvds(struct drm_connector *connector)
0067 {
0068     return container_of(connector, struct rockchip_lvds, connector);
0069 }
0070 
0071 static inline struct rockchip_lvds *encoder_to_lvds(struct drm_encoder *encoder)
0072 {
0073     struct rockchip_encoder *rkencoder = to_rockchip_encoder(encoder);
0074 
0075     return container_of(rkencoder, struct rockchip_lvds, encoder);
0076 }
0077 
0078 static inline void rk3288_writel(struct rockchip_lvds *lvds, u32 offset,
0079                  u32 val)
0080 {
0081     writel_relaxed(val, lvds->regs + offset);
0082     if (lvds->output == DISPLAY_OUTPUT_LVDS)
0083         return;
0084     writel_relaxed(val, lvds->regs + offset + RK3288_LVDS_CH1_OFFSET);
0085 }
0086 
0087 static inline int rockchip_lvds_name_to_format(const char *s)
0088 {
0089     if (strncmp(s, "jeida-18", 8) == 0)
0090         return LVDS_JEIDA_18;
0091     else if (strncmp(s, "jeida-24", 8) == 0)
0092         return LVDS_JEIDA_24;
0093     else if (strncmp(s, "vesa-24", 7) == 0)
0094         return LVDS_VESA_24;
0095 
0096     return -EINVAL;
0097 }
0098 
0099 static inline int rockchip_lvds_name_to_output(const char *s)
0100 {
0101     if (strncmp(s, "rgb", 3) == 0)
0102         return DISPLAY_OUTPUT_RGB;
0103     else if (strncmp(s, "lvds", 4) == 0)
0104         return DISPLAY_OUTPUT_LVDS;
0105     else if (strncmp(s, "duallvds", 8) == 0)
0106         return DISPLAY_OUTPUT_DUAL_LVDS;
0107 
0108     return -EINVAL;
0109 }
0110 
0111 static const struct drm_connector_funcs rockchip_lvds_connector_funcs = {
0112     .fill_modes = drm_helper_probe_single_connector_modes,
0113     .destroy = drm_connector_cleanup,
0114     .reset = drm_atomic_helper_connector_reset,
0115     .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
0116     .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
0117 };
0118 
0119 static int rockchip_lvds_connector_get_modes(struct drm_connector *connector)
0120 {
0121     struct rockchip_lvds *lvds = connector_to_lvds(connector);
0122     struct drm_panel *panel = lvds->panel;
0123 
0124     return drm_panel_get_modes(panel, connector);
0125 }
0126 
0127 static const
0128 struct drm_connector_helper_funcs rockchip_lvds_connector_helper_funcs = {
0129     .get_modes = rockchip_lvds_connector_get_modes,
0130 };
0131 
0132 static int
0133 rockchip_lvds_encoder_atomic_check(struct drm_encoder *encoder,
0134                    struct drm_crtc_state *crtc_state,
0135                    struct drm_connector_state *conn_state)
0136 {
0137     struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
0138 
0139     s->output_mode = ROCKCHIP_OUT_MODE_P888;
0140     s->output_type = DRM_MODE_CONNECTOR_LVDS;
0141 
0142     return 0;
0143 }
0144 
0145 static int rk3288_lvds_poweron(struct rockchip_lvds *lvds)
0146 {
0147     int ret;
0148     u32 val;
0149 
0150     ret = clk_enable(lvds->pclk);
0151     if (ret < 0) {
0152         DRM_DEV_ERROR(lvds->dev, "failed to enable lvds pclk %d\n", ret);
0153         return ret;
0154     }
0155     ret = pm_runtime_get_sync(lvds->dev);
0156     if (ret < 0) {
0157         DRM_DEV_ERROR(lvds->dev, "failed to get pm runtime: %d\n", ret);
0158         clk_disable(lvds->pclk);
0159         return ret;
0160     }
0161     val = RK3288_LVDS_CH0_REG0_LANE4_EN | RK3288_LVDS_CH0_REG0_LANE3_EN |
0162         RK3288_LVDS_CH0_REG0_LANE2_EN | RK3288_LVDS_CH0_REG0_LANE1_EN |
0163         RK3288_LVDS_CH0_REG0_LANE0_EN;
0164     if (lvds->output == DISPLAY_OUTPUT_RGB) {
0165         val |= RK3288_LVDS_CH0_REG0_TTL_EN |
0166             RK3288_LVDS_CH0_REG0_LANECK_EN;
0167         rk3288_writel(lvds, RK3288_LVDS_CH0_REG0, val);
0168         rk3288_writel(lvds, RK3288_LVDS_CH0_REG2,
0169                   RK3288_LVDS_PLL_FBDIV_REG2(0x46));
0170         rk3288_writel(lvds, RK3288_LVDS_CH0_REG4,
0171                   RK3288_LVDS_CH0_REG4_LANECK_TTL_MODE |
0172                   RK3288_LVDS_CH0_REG4_LANE4_TTL_MODE |
0173                   RK3288_LVDS_CH0_REG4_LANE3_TTL_MODE |
0174                   RK3288_LVDS_CH0_REG4_LANE2_TTL_MODE |
0175                   RK3288_LVDS_CH0_REG4_LANE1_TTL_MODE |
0176                   RK3288_LVDS_CH0_REG4_LANE0_TTL_MODE);
0177         rk3288_writel(lvds, RK3288_LVDS_CH0_REG5,
0178                   RK3288_LVDS_CH0_REG5_LANECK_TTL_DATA |
0179                   RK3288_LVDS_CH0_REG5_LANE4_TTL_DATA |
0180                   RK3288_LVDS_CH0_REG5_LANE3_TTL_DATA |
0181                   RK3288_LVDS_CH0_REG5_LANE2_TTL_DATA |
0182                   RK3288_LVDS_CH0_REG5_LANE1_TTL_DATA |
0183                   RK3288_LVDS_CH0_REG5_LANE0_TTL_DATA);
0184     } else {
0185         val |= RK3288_LVDS_CH0_REG0_LVDS_EN |
0186                 RK3288_LVDS_CH0_REG0_LANECK_EN;
0187         rk3288_writel(lvds, RK3288_LVDS_CH0_REG0, val);
0188         rk3288_writel(lvds, RK3288_LVDS_CH0_REG1,
0189                   RK3288_LVDS_CH0_REG1_LANECK_BIAS |
0190                   RK3288_LVDS_CH0_REG1_LANE4_BIAS |
0191                   RK3288_LVDS_CH0_REG1_LANE3_BIAS |
0192                   RK3288_LVDS_CH0_REG1_LANE2_BIAS |
0193                   RK3288_LVDS_CH0_REG1_LANE1_BIAS |
0194                   RK3288_LVDS_CH0_REG1_LANE0_BIAS);
0195         rk3288_writel(lvds, RK3288_LVDS_CH0_REG2,
0196                   RK3288_LVDS_CH0_REG2_RESERVE_ON |
0197                   RK3288_LVDS_CH0_REG2_LANECK_LVDS_MODE |
0198                   RK3288_LVDS_CH0_REG2_LANE4_LVDS_MODE |
0199                   RK3288_LVDS_CH0_REG2_LANE3_LVDS_MODE |
0200                   RK3288_LVDS_CH0_REG2_LANE2_LVDS_MODE |
0201                   RK3288_LVDS_CH0_REG2_LANE1_LVDS_MODE |
0202                   RK3288_LVDS_CH0_REG2_LANE0_LVDS_MODE |
0203                   RK3288_LVDS_PLL_FBDIV_REG2(0x46));
0204         rk3288_writel(lvds, RK3288_LVDS_CH0_REG4, 0x00);
0205         rk3288_writel(lvds, RK3288_LVDS_CH0_REG5, 0x00);
0206     }
0207     rk3288_writel(lvds, RK3288_LVDS_CH0_REG3,
0208               RK3288_LVDS_PLL_FBDIV_REG3(0x46));
0209     rk3288_writel(lvds, RK3288_LVDS_CH0_REGD,
0210               RK3288_LVDS_PLL_PREDIV_REGD(0x0a));
0211     rk3288_writel(lvds, RK3288_LVDS_CH0_REG20,
0212               RK3288_LVDS_CH0_REG20_LSB);
0213 
0214     rk3288_writel(lvds, RK3288_LVDS_CFG_REGC,
0215               RK3288_LVDS_CFG_REGC_PLL_ENABLE);
0216     rk3288_writel(lvds, RK3288_LVDS_CFG_REG21,
0217               RK3288_LVDS_CFG_REG21_TX_ENABLE);
0218 
0219     return 0;
0220 }
0221 
0222 static void rk3288_lvds_poweroff(struct rockchip_lvds *lvds)
0223 {
0224     int ret;
0225     u32 val;
0226 
0227     rk3288_writel(lvds, RK3288_LVDS_CFG_REG21,
0228               RK3288_LVDS_CFG_REG21_TX_ENABLE);
0229     rk3288_writel(lvds, RK3288_LVDS_CFG_REGC,
0230               RK3288_LVDS_CFG_REGC_PLL_ENABLE);
0231     val = LVDS_DUAL | LVDS_TTL_EN | LVDS_CH0_EN | LVDS_CH1_EN | LVDS_PWRDN;
0232     val |= val << 16;
0233     ret = regmap_write(lvds->grf, RK3288_LVDS_GRF_SOC_CON7, val);
0234     if (ret != 0)
0235         DRM_DEV_ERROR(lvds->dev, "Could not write to GRF: %d\n", ret);
0236 
0237     pm_runtime_put(lvds->dev);
0238     clk_disable(lvds->pclk);
0239 }
0240 
0241 static int rk3288_lvds_grf_config(struct drm_encoder *encoder,
0242                   struct drm_display_mode *mode)
0243 {
0244     struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
0245     u8 pin_hsync = (mode->flags & DRM_MODE_FLAG_PHSYNC) ? 1 : 0;
0246     u8 pin_dclk = (mode->flags & DRM_MODE_FLAG_PCSYNC) ? 1 : 0;
0247     u32 val;
0248     int ret;
0249 
0250     /* iomux to LCD data/sync mode */
0251     if (lvds->output == DISPLAY_OUTPUT_RGB)
0252         if (lvds->pins && !IS_ERR(lvds->pins->default_state))
0253             pinctrl_select_state(lvds->pins->p,
0254                          lvds->pins->default_state);
0255     val = lvds->format | LVDS_CH0_EN;
0256     if (lvds->output == DISPLAY_OUTPUT_RGB)
0257         val |= LVDS_TTL_EN | LVDS_CH1_EN;
0258     else if (lvds->output == DISPLAY_OUTPUT_DUAL_LVDS)
0259         val |= LVDS_DUAL | LVDS_CH1_EN;
0260 
0261     if ((mode->htotal - mode->hsync_start) & 0x01)
0262         val |= LVDS_START_PHASE_RST_1;
0263 
0264     val |= (pin_dclk << 8) | (pin_hsync << 9);
0265     val |= (0xffff << 16);
0266     ret = regmap_write(lvds->grf, RK3288_LVDS_GRF_SOC_CON7, val);
0267     if (ret)
0268         DRM_DEV_ERROR(lvds->dev, "Could not write to GRF: %d\n", ret);
0269 
0270     return ret;
0271 }
0272 
0273 static int rk3288_lvds_set_vop_source(struct rockchip_lvds *lvds,
0274                       struct drm_encoder *encoder)
0275 {
0276     u32 val;
0277     int ret;
0278 
0279     ret = drm_of_encoder_active_endpoint_id(lvds->dev->of_node, encoder);
0280     if (ret < 0)
0281         return ret;
0282 
0283     val = RK3288_LVDS_SOC_CON6_SEL_VOP_LIT << 16;
0284     if (ret)
0285         val |= RK3288_LVDS_SOC_CON6_SEL_VOP_LIT;
0286 
0287     ret = regmap_write(lvds->grf, RK3288_LVDS_GRF_SOC_CON6, val);
0288     if (ret < 0)
0289         return ret;
0290 
0291     return 0;
0292 }
0293 
0294 static void rk3288_lvds_encoder_enable(struct drm_encoder *encoder)
0295 {
0296     struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
0297     struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
0298     int ret;
0299 
0300     drm_panel_prepare(lvds->panel);
0301 
0302     ret = rk3288_lvds_poweron(lvds);
0303     if (ret < 0) {
0304         DRM_DEV_ERROR(lvds->dev, "failed to power on LVDS: %d\n", ret);
0305         drm_panel_unprepare(lvds->panel);
0306         return;
0307     }
0308 
0309     ret = rk3288_lvds_grf_config(encoder, mode);
0310     if (ret) {
0311         DRM_DEV_ERROR(lvds->dev, "failed to configure LVDS: %d\n", ret);
0312         drm_panel_unprepare(lvds->panel);
0313         return;
0314     }
0315 
0316     ret = rk3288_lvds_set_vop_source(lvds, encoder);
0317     if (ret) {
0318         DRM_DEV_ERROR(lvds->dev, "failed to set VOP source: %d\n", ret);
0319         drm_panel_unprepare(lvds->panel);
0320         return;
0321     }
0322 
0323     drm_panel_enable(lvds->panel);
0324 }
0325 
0326 static void rk3288_lvds_encoder_disable(struct drm_encoder *encoder)
0327 {
0328     struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
0329 
0330     drm_panel_disable(lvds->panel);
0331     rk3288_lvds_poweroff(lvds);
0332     drm_panel_unprepare(lvds->panel);
0333 }
0334 
0335 static int px30_lvds_poweron(struct rockchip_lvds *lvds)
0336 {
0337     int ret;
0338 
0339     ret = pm_runtime_get_sync(lvds->dev);
0340     if (ret < 0) {
0341         DRM_DEV_ERROR(lvds->dev, "failed to get pm runtime: %d\n", ret);
0342         return ret;
0343     }
0344 
0345     /* Enable LVDS mode */
0346     return regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1,
0347                   PX30_LVDS_MODE_EN(1) | PX30_LVDS_P2S_EN(1),
0348                   PX30_LVDS_MODE_EN(1) | PX30_LVDS_P2S_EN(1));
0349 }
0350 
0351 static void px30_lvds_poweroff(struct rockchip_lvds *lvds)
0352 {
0353     regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1,
0354                PX30_LVDS_MODE_EN(1) | PX30_LVDS_P2S_EN(1),
0355                PX30_LVDS_MODE_EN(0) | PX30_LVDS_P2S_EN(0));
0356 
0357     pm_runtime_put(lvds->dev);
0358 }
0359 
0360 static int px30_lvds_grf_config(struct drm_encoder *encoder,
0361                 struct drm_display_mode *mode)
0362 {
0363     struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
0364 
0365     if (lvds->output != DISPLAY_OUTPUT_LVDS) {
0366         DRM_DEV_ERROR(lvds->dev, "Unsupported display output %d\n",
0367                   lvds->output);
0368         return -EINVAL;
0369     }
0370 
0371     /* Set format */
0372     return regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1,
0373                   PX30_LVDS_FORMAT(lvds->format),
0374                   PX30_LVDS_FORMAT(lvds->format));
0375 }
0376 
0377 static int px30_lvds_set_vop_source(struct rockchip_lvds *lvds,
0378                     struct drm_encoder *encoder)
0379 {
0380     int vop;
0381 
0382     vop = drm_of_encoder_active_endpoint_id(lvds->dev->of_node, encoder);
0383     if (vop < 0)
0384         return vop;
0385 
0386     return regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1,
0387                   PX30_LVDS_VOP_SEL(1),
0388                   PX30_LVDS_VOP_SEL(vop));
0389 }
0390 
0391 static void px30_lvds_encoder_enable(struct drm_encoder *encoder)
0392 {
0393     struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
0394     struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
0395     int ret;
0396 
0397     drm_panel_prepare(lvds->panel);
0398 
0399     ret = px30_lvds_poweron(lvds);
0400     if (ret) {
0401         DRM_DEV_ERROR(lvds->dev, "failed to power on LVDS: %d\n", ret);
0402         drm_panel_unprepare(lvds->panel);
0403         return;
0404     }
0405 
0406     ret = px30_lvds_grf_config(encoder, mode);
0407     if (ret) {
0408         DRM_DEV_ERROR(lvds->dev, "failed to configure LVDS: %d\n", ret);
0409         drm_panel_unprepare(lvds->panel);
0410         return;
0411     }
0412 
0413     ret = px30_lvds_set_vop_source(lvds, encoder);
0414     if (ret) {
0415         DRM_DEV_ERROR(lvds->dev, "failed to set VOP source: %d\n", ret);
0416         drm_panel_unprepare(lvds->panel);
0417         return;
0418     }
0419 
0420     drm_panel_enable(lvds->panel);
0421 }
0422 
0423 static void px30_lvds_encoder_disable(struct drm_encoder *encoder)
0424 {
0425     struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
0426 
0427     drm_panel_disable(lvds->panel);
0428     px30_lvds_poweroff(lvds);
0429     drm_panel_unprepare(lvds->panel);
0430 }
0431 
0432 static const
0433 struct drm_encoder_helper_funcs rk3288_lvds_encoder_helper_funcs = {
0434     .enable = rk3288_lvds_encoder_enable,
0435     .disable = rk3288_lvds_encoder_disable,
0436     .atomic_check = rockchip_lvds_encoder_atomic_check,
0437 };
0438 
0439 static const
0440 struct drm_encoder_helper_funcs px30_lvds_encoder_helper_funcs = {
0441     .enable = px30_lvds_encoder_enable,
0442     .disable = px30_lvds_encoder_disable,
0443     .atomic_check = rockchip_lvds_encoder_atomic_check,
0444 };
0445 
0446 static int rk3288_lvds_probe(struct platform_device *pdev,
0447                  struct rockchip_lvds *lvds)
0448 {
0449     int ret;
0450 
0451     lvds->regs = devm_platform_ioremap_resource(pdev, 0);
0452     if (IS_ERR(lvds->regs))
0453         return PTR_ERR(lvds->regs);
0454 
0455     lvds->pclk = devm_clk_get(lvds->dev, "pclk_lvds");
0456     if (IS_ERR(lvds->pclk)) {
0457         DRM_DEV_ERROR(lvds->dev, "could not get pclk_lvds\n");
0458         return PTR_ERR(lvds->pclk);
0459     }
0460 
0461     lvds->pins = devm_kzalloc(lvds->dev, sizeof(*lvds->pins),
0462                   GFP_KERNEL);
0463     if (!lvds->pins)
0464         return -ENOMEM;
0465 
0466     lvds->pins->p = devm_pinctrl_get(lvds->dev);
0467     if (IS_ERR(lvds->pins->p)) {
0468         DRM_DEV_ERROR(lvds->dev, "no pinctrl handle\n");
0469         devm_kfree(lvds->dev, lvds->pins);
0470         lvds->pins = NULL;
0471     } else {
0472         lvds->pins->default_state =
0473             pinctrl_lookup_state(lvds->pins->p, "lcdc");
0474         if (IS_ERR(lvds->pins->default_state)) {
0475             DRM_DEV_ERROR(lvds->dev, "no default pinctrl state\n");
0476             devm_kfree(lvds->dev, lvds->pins);
0477             lvds->pins = NULL;
0478         }
0479     }
0480 
0481     ret = clk_prepare(lvds->pclk);
0482     if (ret < 0) {
0483         DRM_DEV_ERROR(lvds->dev, "failed to prepare pclk_lvds\n");
0484         return ret;
0485     }
0486 
0487     return 0;
0488 }
0489 
0490 static int px30_lvds_probe(struct platform_device *pdev,
0491                struct rockchip_lvds *lvds)
0492 {
0493     int ret;
0494 
0495     /* MSB */
0496     ret =  regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1,
0497                   PX30_LVDS_MSBSEL(1),
0498                   PX30_LVDS_MSBSEL(1));
0499     if (ret)
0500         return ret;
0501 
0502     /* PHY */
0503     lvds->dphy = devm_phy_get(&pdev->dev, "dphy");
0504     if (IS_ERR(lvds->dphy))
0505         return PTR_ERR(lvds->dphy);
0506 
0507     ret = phy_init(lvds->dphy);
0508     if (ret)
0509         return ret;
0510 
0511     ret = phy_set_mode(lvds->dphy, PHY_MODE_LVDS);
0512     if (ret)
0513         return ret;
0514 
0515     return phy_power_on(lvds->dphy);
0516 }
0517 
0518 static const struct rockchip_lvds_soc_data rk3288_lvds_data = {
0519     .probe = rk3288_lvds_probe,
0520     .helper_funcs = &rk3288_lvds_encoder_helper_funcs,
0521 };
0522 
0523 static const struct rockchip_lvds_soc_data px30_lvds_data = {
0524     .probe = px30_lvds_probe,
0525     .helper_funcs = &px30_lvds_encoder_helper_funcs,
0526 };
0527 
0528 static const struct of_device_id rockchip_lvds_dt_ids[] = {
0529     {
0530         .compatible = "rockchip,rk3288-lvds",
0531         .data = &rk3288_lvds_data
0532     },
0533     {
0534         .compatible = "rockchip,px30-lvds",
0535         .data = &px30_lvds_data
0536     },
0537     {}
0538 };
0539 MODULE_DEVICE_TABLE(of, rockchip_lvds_dt_ids);
0540 
0541 static int rockchip_lvds_bind(struct device *dev, struct device *master,
0542                   void *data)
0543 {
0544     struct rockchip_lvds *lvds = dev_get_drvdata(dev);
0545     struct drm_device *drm_dev = data;
0546     struct drm_encoder *encoder;
0547     struct drm_connector *connector;
0548     struct device_node *remote = NULL;
0549     struct device_node  *port, *endpoint;
0550     int ret = 0, child_count = 0;
0551     const char *name;
0552     u32 endpoint_id = 0;
0553 
0554     lvds->drm_dev = drm_dev;
0555     port = of_graph_get_port_by_id(dev->of_node, 1);
0556     if (!port) {
0557         DRM_DEV_ERROR(dev,
0558                   "can't found port point, please init lvds panel port!\n");
0559         return -EINVAL;
0560     }
0561     for_each_child_of_node(port, endpoint) {
0562         child_count++;
0563         of_property_read_u32(endpoint, "reg", &endpoint_id);
0564         ret = drm_of_find_panel_or_bridge(dev->of_node, 1, endpoint_id,
0565                           &lvds->panel, &lvds->bridge);
0566         if (!ret) {
0567             of_node_put(endpoint);
0568             break;
0569         }
0570     }
0571     if (!child_count) {
0572         DRM_DEV_ERROR(dev, "lvds port does not have any children\n");
0573         ret = -EINVAL;
0574         goto err_put_port;
0575     } else if (ret) {
0576         DRM_DEV_ERROR(dev, "failed to find panel and bridge node\n");
0577         ret = -EPROBE_DEFER;
0578         goto err_put_port;
0579     }
0580     if (lvds->panel)
0581         remote = lvds->panel->dev->of_node;
0582     else
0583         remote = lvds->bridge->of_node;
0584     if (of_property_read_string(dev->of_node, "rockchip,output", &name))
0585         /* default set it as output rgb */
0586         lvds->output = DISPLAY_OUTPUT_RGB;
0587     else
0588         lvds->output = rockchip_lvds_name_to_output(name);
0589 
0590     if (lvds->output < 0) {
0591         DRM_DEV_ERROR(dev, "invalid output type [%s]\n", name);
0592         ret = lvds->output;
0593         goto err_put_remote;
0594     }
0595 
0596     if (of_property_read_string(remote, "data-mapping", &name))
0597         /* default set it as format vesa 18 */
0598         lvds->format = LVDS_VESA_18;
0599     else
0600         lvds->format = rockchip_lvds_name_to_format(name);
0601 
0602     if (lvds->format < 0) {
0603         DRM_DEV_ERROR(dev, "invalid data-mapping format [%s]\n", name);
0604         ret = lvds->format;
0605         goto err_put_remote;
0606     }
0607 
0608     encoder = &lvds->encoder.encoder;
0609     encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
0610                                  dev->of_node);
0611 
0612     ret = drm_simple_encoder_init(drm_dev, encoder, DRM_MODE_ENCODER_LVDS);
0613     if (ret < 0) {
0614         DRM_DEV_ERROR(drm_dev->dev,
0615                   "failed to initialize encoder: %d\n", ret);
0616         goto err_put_remote;
0617     }
0618 
0619     drm_encoder_helper_add(encoder, lvds->soc_data->helper_funcs);
0620     connector = &lvds->connector;
0621 
0622     if (lvds->panel) {
0623         connector->dpms = DRM_MODE_DPMS_OFF;
0624         ret = drm_connector_init(drm_dev, connector,
0625                      &rockchip_lvds_connector_funcs,
0626                      DRM_MODE_CONNECTOR_LVDS);
0627         if (ret < 0) {
0628             DRM_DEV_ERROR(drm_dev->dev,
0629                       "failed to initialize connector: %d\n", ret);
0630             goto err_free_encoder;
0631         }
0632 
0633         drm_connector_helper_add(connector,
0634                      &rockchip_lvds_connector_helper_funcs);
0635     } else {
0636         ret = drm_bridge_attach(encoder, lvds->bridge, NULL,
0637                     DRM_BRIDGE_ATTACH_NO_CONNECTOR);
0638         if (ret)
0639             goto err_free_encoder;
0640 
0641         connector = drm_bridge_connector_init(lvds->drm_dev, encoder);
0642         if (IS_ERR(connector)) {
0643             DRM_DEV_ERROR(drm_dev->dev,
0644                       "failed to initialize bridge connector: %pe\n",
0645                       connector);
0646             ret = PTR_ERR(connector);
0647             goto err_free_encoder;
0648         }
0649     }
0650 
0651     ret = drm_connector_attach_encoder(connector, encoder);
0652     if (ret < 0) {
0653         DRM_DEV_ERROR(drm_dev->dev,
0654                   "failed to attach encoder: %d\n", ret);
0655         goto err_free_connector;
0656     }
0657 
0658     pm_runtime_enable(dev);
0659     of_node_put(remote);
0660     of_node_put(port);
0661 
0662     return 0;
0663 
0664 err_free_connector:
0665     drm_connector_cleanup(connector);
0666 err_free_encoder:
0667     drm_encoder_cleanup(encoder);
0668 err_put_remote:
0669     of_node_put(remote);
0670 err_put_port:
0671     of_node_put(port);
0672 
0673     return ret;
0674 }
0675 
0676 static void rockchip_lvds_unbind(struct device *dev, struct device *master,
0677                 void *data)
0678 {
0679     struct rockchip_lvds *lvds = dev_get_drvdata(dev);
0680     const struct drm_encoder_helper_funcs *encoder_funcs;
0681 
0682     encoder_funcs = lvds->soc_data->helper_funcs;
0683     encoder_funcs->disable(&lvds->encoder.encoder);
0684     pm_runtime_disable(dev);
0685     drm_connector_cleanup(&lvds->connector);
0686     drm_encoder_cleanup(&lvds->encoder.encoder);
0687 }
0688 
0689 static const struct component_ops rockchip_lvds_component_ops = {
0690     .bind = rockchip_lvds_bind,
0691     .unbind = rockchip_lvds_unbind,
0692 };
0693 
0694 static int rockchip_lvds_probe(struct platform_device *pdev)
0695 {
0696     struct device *dev = &pdev->dev;
0697     struct rockchip_lvds *lvds;
0698     const struct of_device_id *match;
0699     int ret;
0700 
0701     if (!dev->of_node)
0702         return -ENODEV;
0703 
0704     lvds = devm_kzalloc(&pdev->dev, sizeof(*lvds), GFP_KERNEL);
0705     if (!lvds)
0706         return -ENOMEM;
0707 
0708     lvds->dev = dev;
0709     match = of_match_node(rockchip_lvds_dt_ids, dev->of_node);
0710     if (!match)
0711         return -ENODEV;
0712     lvds->soc_data = match->data;
0713 
0714     lvds->grf = syscon_regmap_lookup_by_phandle(dev->of_node,
0715                             "rockchip,grf");
0716     if (IS_ERR(lvds->grf)) {
0717         DRM_DEV_ERROR(dev, "missing rockchip,grf property\n");
0718         return PTR_ERR(lvds->grf);
0719     }
0720 
0721     ret = lvds->soc_data->probe(pdev, lvds);
0722     if (ret) {
0723         DRM_DEV_ERROR(dev, "Platform initialization failed\n");
0724         return ret;
0725     }
0726 
0727     dev_set_drvdata(dev, lvds);
0728 
0729     ret = component_add(&pdev->dev, &rockchip_lvds_component_ops);
0730     if (ret < 0) {
0731         DRM_DEV_ERROR(dev, "failed to add component\n");
0732         clk_unprepare(lvds->pclk);
0733     }
0734 
0735     return ret;
0736 }
0737 
0738 static int rockchip_lvds_remove(struct platform_device *pdev)
0739 {
0740     struct rockchip_lvds *lvds = platform_get_drvdata(pdev);
0741 
0742     component_del(&pdev->dev, &rockchip_lvds_component_ops);
0743     clk_unprepare(lvds->pclk);
0744 
0745     return 0;
0746 }
0747 
0748 struct platform_driver rockchip_lvds_driver = {
0749     .probe = rockchip_lvds_probe,
0750     .remove = rockchip_lvds_remove,
0751     .driver = {
0752            .name = "rockchip-lvds",
0753            .of_match_table = of_match_ptr(rockchip_lvds_dt_ids),
0754     },
0755 };
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