drivers/gpu/drm/rockchip/rockchip_lvds.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
   4  * Author:
   5  *      Mark Yao <mark.yao@rock-chips.com>
   6  *      Sandy Huang <hjc@rock-chips.com>
   7  */
   8
   9 #include <linux/clk.h>
  10 #include <linux/component.h>
  11 #include <linux/mfd/syscon.h>
  12 #include <linux/of_graph.h>
  13 #include <linux/phy/phy.h>
  14 #include <linux/pinctrl/devinfo.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/pm_runtime.h>
  17 #include <linux/regmap.h>
  18 #include <linux/reset.h>
  19
  20 #include <drm/display/drm_dp_helper.h>
  21 #include <drm/drm_atomic_helper.h>
  22 #include <drm/drm_bridge.h>
  23 #include <drm/drm_bridge_connector.h>
  24 #include <drm/drm_of.h>
  25 #include <drm/drm_panel.h>
  26 #include <drm/drm_probe_helper.h>
  27 #include <drm/drm_simple_kms_helper.h>
  28
  29 #include "rockchip_drm_drv.h"
  30 #include "rockchip_lvds.h"
  31
  32 #define DISPLAY_OUTPUT_RGB              0
  33 #define DISPLAY_OUTPUT_LVDS             1
  34 #define DISPLAY_OUTPUT_DUAL_LVDS        2
  35
  36 struct rockchip_lvds;
  37
  38 /**
  39  * struct rockchip_lvds_soc_data - rockchip lvds Soc private data
  40  * @probe: LVDS platform probe function
  41  * @helper_funcs: LVDS connector helper functions
  42  */
  43 struct rockchip_lvds_soc_data {
  44         int (*probe)(struct platform_device *pdev, struct rockchip_lvds *lvds);
  45         const struct drm_encoder_helper_funcs *helper_funcs;
  46 };
  47
  48 struct rockchip_lvds {
  49         struct device *dev;
  50         void __iomem *regs;
  51         struct regmap *grf;
  52         struct clk *pclk;
  53         struct phy *dphy;
  54         const struct rockchip_lvds_soc_data *soc_data;
  55         int output; /* rgb lvds or dual lvds output */
  56         int format; /* vesa or jeida format */
  57         struct drm_device *drm_dev;
  58         struct drm_panel *panel;
  59         struct drm_bridge *bridge;
  60         struct drm_connector connector;
  61         struct rockchip_encoder encoder;
  62         struct dev_pin_info *pins;
  63 };
  64
  65 static inline struct rockchip_lvds *connector_to_lvds(struct drm_connector *connector)
  66 {
  67         return container_of(connector, struct rockchip_lvds, connector);
  68 }
  69
  70 static inline struct rockchip_lvds *encoder_to_lvds(struct drm_encoder *encoder)
  71 {
  72         struct rockchip_encoder *rkencoder = to_rockchip_encoder(encoder);
  73
  74         return container_of(rkencoder, struct rockchip_lvds, encoder);
  75 }
  76
  77 static inline void rk3288_writel(struct rockchip_lvds *lvds, u32 offset,
  78                                  u32 val)
  79 {
  80         writel_relaxed(val, lvds->regs + offset);
  81         if (lvds->output == DISPLAY_OUTPUT_LVDS)
  82                 return;
  83         writel_relaxed(val, lvds->regs + offset + RK3288_LVDS_CH1_OFFSET);
  84 }
  85
  86 static inline int rockchip_lvds_name_to_format(const char *s)
  87 {
  88         if (strncmp(s, "jeida-18", 8) == 0)
  89                 return LVDS_JEIDA_18;
  90         else if (strncmp(s, "jeida-24", 8) == 0)
  91                 return LVDS_JEIDA_24;
  92         else if (strncmp(s, "vesa-24", 7) == 0)
  93                 return LVDS_VESA_24;
  94
  95         return -EINVAL;
  96 }
  97
  98 static inline int rockchip_lvds_name_to_output(const char *s)
  99 {
 100         if (strncmp(s, "rgb", 3) == 0)
 101                 return DISPLAY_OUTPUT_RGB;
 102         else if (strncmp(s, "lvds", 4) == 0)
 103                 return DISPLAY_OUTPUT_LVDS;
 104         else if (strncmp(s, "duallvds", 8) == 0)
 105                 return DISPLAY_OUTPUT_DUAL_LVDS;
 106
 107         return -EINVAL;
 108 }
 109
 110 static const struct drm_connector_funcs rockchip_lvds_connector_funcs = {
 111         .fill_modes = drm_helper_probe_single_connector_modes,
 112         .destroy = drm_connector_cleanup,
 113         .reset = drm_atomic_helper_connector_reset,
 114         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 115         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 116 };
 117
 118 static int rockchip_lvds_connector_get_modes(struct drm_connector *connector)
 119 {
 120         struct rockchip_lvds *lvds = connector_to_lvds(connector);
 121         struct drm_panel *panel = lvds->panel;
 122
 123         return drm_panel_get_modes(panel, connector);
 124 }
 125
 126 static const
 127 struct drm_connector_helper_funcs rockchip_lvds_connector_helper_funcs = {
 128         .get_modes = rockchip_lvds_connector_get_modes,
 129 };
 130
 131 static int
 132 rockchip_lvds_encoder_atomic_check(struct drm_encoder *encoder,
 133                                    struct drm_crtc_state *crtc_state,
 134                                    struct drm_connector_state *conn_state)
 135 {
 136         struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
 137
 138         s->output_mode = ROCKCHIP_OUT_MODE_P888;
 139         s->output_type = DRM_MODE_CONNECTOR_LVDS;
 140
 141         return 0;
 142 }
 143
 144 static int rk3288_lvds_poweron(struct rockchip_lvds *lvds)
 145 {
 146         int ret;
 147         u32 val;
 148
 149         ret = clk_enable(lvds->pclk);
 150         if (ret < 0) {
 151                 DRM_DEV_ERROR(lvds->dev, "failed to enable lvds pclk %d\n", ret);
 152                 return ret;
 153         }
 154         ret = pm_runtime_resume_and_get(lvds->dev);
 155         if (ret < 0) {
 156                 DRM_DEV_ERROR(lvds->dev, "failed to get pm runtime: %d\n", ret);
 157                 clk_disable(lvds->pclk);
 158                 return ret;
 159         }
 160         val = RK3288_LVDS_CH0_REG0_LANE4_EN | RK3288_LVDS_CH0_REG0_LANE3_EN |
 161                 RK3288_LVDS_CH0_REG0_LANE2_EN | RK3288_LVDS_CH0_REG0_LANE1_EN |
 162                 RK3288_LVDS_CH0_REG0_LANE0_EN;
 163         if (lvds->output == DISPLAY_OUTPUT_RGB) {
 164                 val |= RK3288_LVDS_CH0_REG0_TTL_EN |
 165                         RK3288_LVDS_CH0_REG0_LANECK_EN;
 166                 rk3288_writel(lvds, RK3288_LVDS_CH0_REG0, val);
 167                 rk3288_writel(lvds, RK3288_LVDS_CH0_REG2,
 168                               RK3288_LVDS_PLL_FBDIV_REG2(0x46));
 169                 rk3288_writel(lvds, RK3288_LVDS_CH0_REG4,
 170                               RK3288_LVDS_CH0_REG4_LANECK_TTL_MODE |
 171                               RK3288_LVDS_CH0_REG4_LANE4_TTL_MODE |
 172                               RK3288_LVDS_CH0_REG4_LANE3_TTL_MODE |
 173                               RK3288_LVDS_CH0_REG4_LANE2_TTL_MODE |
 174                               RK3288_LVDS_CH0_REG4_LANE1_TTL_MODE |
 175                               RK3288_LVDS_CH0_REG4_LANE0_TTL_MODE);
 176                 rk3288_writel(lvds, RK3288_LVDS_CH0_REG5,
 177                               RK3288_LVDS_CH0_REG5_LANECK_TTL_DATA |
 178                               RK3288_LVDS_CH0_REG5_LANE4_TTL_DATA |
 179                               RK3288_LVDS_CH0_REG5_LANE3_TTL_DATA |
 180                               RK3288_LVDS_CH0_REG5_LANE2_TTL_DATA |
 181                               RK3288_LVDS_CH0_REG5_LANE1_TTL_DATA |
 182                               RK3288_LVDS_CH0_REG5_LANE0_TTL_DATA);
 183         } else {
 184                 val |= RK3288_LVDS_CH0_REG0_LVDS_EN |
 185                             RK3288_LVDS_CH0_REG0_LANECK_EN;
 186                 rk3288_writel(lvds, RK3288_LVDS_CH0_REG0, val);
 187                 rk3288_writel(lvds, RK3288_LVDS_CH0_REG1,
 188                               RK3288_LVDS_CH0_REG1_LANECK_BIAS |
 189                               RK3288_LVDS_CH0_REG1_LANE4_BIAS |
 190                               RK3288_LVDS_CH0_REG1_LANE3_BIAS |
 191                               RK3288_LVDS_CH0_REG1_LANE2_BIAS |
 192                               RK3288_LVDS_CH0_REG1_LANE1_BIAS |
 193                               RK3288_LVDS_CH0_REG1_LANE0_BIAS);
 194                 rk3288_writel(lvds, RK3288_LVDS_CH0_REG2,
 195                               RK3288_LVDS_CH0_REG2_RESERVE_ON |
 196                               RK3288_LVDS_CH0_REG2_LANECK_LVDS_MODE |
 197                               RK3288_LVDS_CH0_REG2_LANE4_LVDS_MODE |
 198                               RK3288_LVDS_CH0_REG2_LANE3_LVDS_MODE |
 199                               RK3288_LVDS_CH0_REG2_LANE2_LVDS_MODE |
 200                               RK3288_LVDS_CH0_REG2_LANE1_LVDS_MODE |
 201                               RK3288_LVDS_CH0_REG2_LANE0_LVDS_MODE |
 202                               RK3288_LVDS_PLL_FBDIV_REG2(0x46));
 203                 rk3288_writel(lvds, RK3288_LVDS_CH0_REG4, 0x00);
 204                 rk3288_writel(lvds, RK3288_LVDS_CH0_REG5, 0x00);
 205         }
 206         rk3288_writel(lvds, RK3288_LVDS_CH0_REG3,
 207                       RK3288_LVDS_PLL_FBDIV_REG3(0x46));
 208         rk3288_writel(lvds, RK3288_LVDS_CH0_REGD,
 209                       RK3288_LVDS_PLL_PREDIV_REGD(0x0a));
 210         rk3288_writel(lvds, RK3288_LVDS_CH0_REG20,
 211                       RK3288_LVDS_CH0_REG20_LSB);
 212
 213         rk3288_writel(lvds, RK3288_LVDS_CFG_REGC,
 214                       RK3288_LVDS_CFG_REGC_PLL_ENABLE);
 215         rk3288_writel(lvds, RK3288_LVDS_CFG_REG21,
 216                       RK3288_LVDS_CFG_REG21_TX_ENABLE);
 217
 218         return 0;
 219 }
 220
 221 static void rk3288_lvds_poweroff(struct rockchip_lvds *lvds)
 222 {
 223         int ret;
 224         u32 val;
 225
 226         rk3288_writel(lvds, RK3288_LVDS_CFG_REG21,
 227                       RK3288_LVDS_CFG_REG21_TX_ENABLE);
 228         rk3288_writel(lvds, RK3288_LVDS_CFG_REGC,
 229                       RK3288_LVDS_CFG_REGC_PLL_ENABLE);
 230         val = LVDS_DUAL | LVDS_TTL_EN | LVDS_CH0_EN | LVDS_CH1_EN | LVDS_PWRDN;
 231         val |= val << 16;
 232         ret = regmap_write(lvds->grf, RK3288_LVDS_GRF_SOC_CON7, val);
 233         if (ret != 0)
 234                 DRM_DEV_ERROR(lvds->dev, "Could not write to GRF: %d\n", ret);
 235
 236         pm_runtime_put(lvds->dev);
 237         clk_disable(lvds->pclk);
 238 }
 239
 240 static int rk3288_lvds_grf_config(struct drm_encoder *encoder,
 241                                   struct drm_display_mode *mode)
 242 {
 243         struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
 244         u8 pin_hsync = (mode->flags & DRM_MODE_FLAG_PHSYNC) ? 1 : 0;
 245         u8 pin_dclk = (mode->flags & DRM_MODE_FLAG_PCSYNC) ? 1 : 0;
 246         u32 val;
 247         int ret;
 248
 249         /* iomux to LCD data/sync mode */
 250         if (lvds->output == DISPLAY_OUTPUT_RGB)
 251                 if (lvds->pins && !IS_ERR(lvds->pins->default_state))
 252                         pinctrl_select_state(lvds->pins->p,
 253                                              lvds->pins->default_state);
 254         val = lvds->format | LVDS_CH0_EN;
 255         if (lvds->output == DISPLAY_OUTPUT_RGB)
 256                 val |= LVDS_TTL_EN | LVDS_CH1_EN;
 257         else if (lvds->output == DISPLAY_OUTPUT_DUAL_LVDS)
 258                 val |= LVDS_DUAL | LVDS_CH1_EN;
 259
 260         if ((mode->htotal - mode->hsync_start) & 0x01)
 261                 val |= LVDS_START_PHASE_RST_1;
 262
 263         val |= (pin_dclk << 8) | (pin_hsync << 9);
 264         val |= (0xffff << 16);
 265         ret = regmap_write(lvds->grf, RK3288_LVDS_GRF_SOC_CON7, val);
 266         if (ret)
 267                 DRM_DEV_ERROR(lvds->dev, "Could not write to GRF: %d\n", ret);
 268
 269         return ret;
 270 }
 271
 272 static int rk3288_lvds_set_vop_source(struct rockchip_lvds *lvds,
 273                                       struct drm_encoder *encoder)
 274 {
 275         u32 val;
 276         int ret;
 277
 278         ret = drm_of_encoder_active_endpoint_id(lvds->dev->of_node, encoder);
 279         if (ret < 0)
 280                 return ret;
 281
 282         val = RK3288_LVDS_SOC_CON6_SEL_VOP_LIT << 16;
 283         if (ret)
 284                 val |= RK3288_LVDS_SOC_CON6_SEL_VOP_LIT;
 285
 286         ret = regmap_write(lvds->grf, RK3288_LVDS_GRF_SOC_CON6, val);
 287         if (ret < 0)
 288                 return ret;
 289
 290         return 0;
 291 }
 292
 293 static void rk3288_lvds_encoder_enable(struct drm_encoder *encoder)
 294 {
 295         struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
 296         struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
 297         int ret;
 298
 299         drm_panel_prepare(lvds->panel);
 300
 301         ret = rk3288_lvds_poweron(lvds);
 302         if (ret < 0) {
 303                 DRM_DEV_ERROR(lvds->dev, "failed to power on LVDS: %d\n", ret);
 304                 drm_panel_unprepare(lvds->panel);
 305                 return;
 306         }
 307
 308         ret = rk3288_lvds_grf_config(encoder, mode);
 309         if (ret) {
 310                 DRM_DEV_ERROR(lvds->dev, "failed to configure LVDS: %d\n", ret);
 311                 drm_panel_unprepare(lvds->panel);
 312                 return;
 313         }
 314
 315         ret = rk3288_lvds_set_vop_source(lvds, encoder);
 316         if (ret) {
 317                 DRM_DEV_ERROR(lvds->dev, "failed to set VOP source: %d\n", ret);
 318                 drm_panel_unprepare(lvds->panel);
 319                 return;
 320         }
 321
 322         drm_panel_enable(lvds->panel);
 323 }
 324
 325 static void rk3288_lvds_encoder_disable(struct drm_encoder *encoder)
 326 {
 327         struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
 328
 329         drm_panel_disable(lvds->panel);
 330         rk3288_lvds_poweroff(lvds);
 331         drm_panel_unprepare(lvds->panel);
 332 }
 333
 334 static int px30_lvds_poweron(struct rockchip_lvds *lvds)
 335 {
 336         int ret;
 337
 338         ret = pm_runtime_resume_and_get(lvds->dev);
 339         if (ret < 0) {
 340                 DRM_DEV_ERROR(lvds->dev, "failed to get pm runtime: %d\n", ret);
 341                 return ret;
 342         }
 343
 344         /* Enable LVDS mode */
 345         ret = regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1,
 346                                   PX30_LVDS_MODE_EN(1) | PX30_LVDS_P2S_EN(1),
 347                                   PX30_LVDS_MODE_EN(1) | PX30_LVDS_P2S_EN(1));
 348         if (ret)
 349                 pm_runtime_put(lvds->dev);
 350
 351         return ret;
 352 }
 353
 354 static void px30_lvds_poweroff(struct rockchip_lvds *lvds)
 355 {
 356         regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1,
 357                            PX30_LVDS_MODE_EN(1) | PX30_LVDS_P2S_EN(1),
 358                            PX30_LVDS_MODE_EN(0) | PX30_LVDS_P2S_EN(0));
 359
 360         pm_runtime_put(lvds->dev);
 361 }
 362
 363 static int px30_lvds_grf_config(struct drm_encoder *encoder,
 364                                 struct drm_display_mode *mode)
 365 {
 366         struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
 367
 368         if (lvds->output != DISPLAY_OUTPUT_LVDS) {
 369                 DRM_DEV_ERROR(lvds->dev, "Unsupported display output %d\n",
 370                               lvds->output);
 371                 return -EINVAL;
 372         }
 373
 374         /* Set format */
 375         return regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1,
 376                                   PX30_LVDS_FORMAT(lvds->format),
 377                                   PX30_LVDS_FORMAT(lvds->format));
 378 }
 379
 380 static int px30_lvds_set_vop_source(struct rockchip_lvds *lvds,
 381                                     struct drm_encoder *encoder)
 382 {
 383         int vop;
 384
 385         vop = drm_of_encoder_active_endpoint_id(lvds->dev->of_node, encoder);
 386         if (vop < 0)
 387                 return vop;
 388
 389         return regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1,
 390                                   PX30_LVDS_VOP_SEL(1),
 391                                   PX30_LVDS_VOP_SEL(vop));
 392 }
 393
 394 static void px30_lvds_encoder_enable(struct drm_encoder *encoder)
 395 {
 396         struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
 397         struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
 398         int ret;
 399
 400         drm_panel_prepare(lvds->panel);
 401
 402         ret = px30_lvds_poweron(lvds);
 403         if (ret) {
 404                 DRM_DEV_ERROR(lvds->dev, "failed to power on LVDS: %d\n", ret);
 405                 drm_panel_unprepare(lvds->panel);
 406                 return;
 407         }
 408
 409         ret = px30_lvds_grf_config(encoder, mode);
 410         if (ret) {
 411                 DRM_DEV_ERROR(lvds->dev, "failed to configure LVDS: %d\n", ret);
 412                 drm_panel_unprepare(lvds->panel);
 413                 return;
 414         }
 415
 416         ret = px30_lvds_set_vop_source(lvds, encoder);
 417         if (ret) {
 418                 DRM_DEV_ERROR(lvds->dev, "failed to set VOP source: %d\n", ret);
 419                 drm_panel_unprepare(lvds->panel);
 420                 return;
 421         }
 422
 423         drm_panel_enable(lvds->panel);
 424 }
 425
 426 static void px30_lvds_encoder_disable(struct drm_encoder *encoder)
 427 {
 428         struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
 429
 430         drm_panel_disable(lvds->panel);
 431         px30_lvds_poweroff(lvds);
 432         drm_panel_unprepare(lvds->panel);
 433 }
 434
 435 static const
 436 struct drm_encoder_helper_funcs rk3288_lvds_encoder_helper_funcs = {
 437         .enable = rk3288_lvds_encoder_enable,
 438         .disable = rk3288_lvds_encoder_disable,
 439         .atomic_check = rockchip_lvds_encoder_atomic_check,
 440 };
 441
 442 static const
 443 struct drm_encoder_helper_funcs px30_lvds_encoder_helper_funcs = {
 444         .enable = px30_lvds_encoder_enable,
 445         .disable = px30_lvds_encoder_disable,
 446         .atomic_check = rockchip_lvds_encoder_atomic_check,
 447 };
 448
 449 static int rk3288_lvds_probe(struct platform_device *pdev,
 450                              struct rockchip_lvds *lvds)
 451 {
 452         int ret;
 453
 454         lvds->regs = devm_platform_ioremap_resource(pdev, 0);
 455         if (IS_ERR(lvds->regs))
 456                 return PTR_ERR(lvds->regs);
 457
 458         lvds->pclk = devm_clk_get(lvds->dev, "pclk_lvds");
 459         if (IS_ERR(lvds->pclk)) {
 460                 DRM_DEV_ERROR(lvds->dev, "could not get pclk_lvds\n");
 461                 return PTR_ERR(lvds->pclk);
 462         }
 463
 464         lvds->pins = devm_kzalloc(lvds->dev, sizeof(*lvds->pins),
 465                                   GFP_KERNEL);
 466         if (!lvds->pins)
 467                 return -ENOMEM;
 468
 469         lvds->pins->p = devm_pinctrl_get(lvds->dev);
 470         if (IS_ERR(lvds->pins->p)) {
 471                 DRM_DEV_ERROR(lvds->dev, "no pinctrl handle\n");
 472                 devm_kfree(lvds->dev, lvds->pins);
 473                 lvds->pins = NULL;
 474         } else {
 475                 lvds->pins->default_state =
 476                         pinctrl_lookup_state(lvds->pins->p, "lcdc");
 477                 if (IS_ERR(lvds->pins->default_state)) {
 478                         DRM_DEV_ERROR(lvds->dev, "no default pinctrl state\n");
 479                         devm_kfree(lvds->dev, lvds->pins);
 480                         lvds->pins = NULL;
 481                 }
 482         }
 483
 484         ret = clk_prepare(lvds->pclk);
 485         if (ret < 0) {
 486                 DRM_DEV_ERROR(lvds->dev, "failed to prepare pclk_lvds\n");
 487                 return ret;
 488         }
 489
 490         return 0;
 491 }
 492
 493 static int px30_lvds_probe(struct platform_device *pdev,
 494                            struct rockchip_lvds *lvds)
 495 {
 496         int ret;
 497
 498         /* MSB */
 499         ret =  regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1,
 500                                   PX30_LVDS_MSBSEL(1),
 501                                   PX30_LVDS_MSBSEL(1));
 502         if (ret)
 503                 return ret;
 504
 505         /* PHY */
 506         lvds->dphy = devm_phy_get(&pdev->dev, "dphy");
 507         if (IS_ERR(lvds->dphy))
 508                 return PTR_ERR(lvds->dphy);
 509
 510         ret = phy_init(lvds->dphy);
 511         if (ret)
 512                 return ret;
 513
 514         ret = phy_set_mode(lvds->dphy, PHY_MODE_LVDS);
 515         if (ret)
 516                 return ret;
 517
 518         return phy_power_on(lvds->dphy);
 519 }
 520
 521 static const struct rockchip_lvds_soc_data rk3288_lvds_data = {
 522         .probe = rk3288_lvds_probe,
 523         .helper_funcs = &rk3288_lvds_encoder_helper_funcs,
 524 };
 525
 526 static const struct rockchip_lvds_soc_data px30_lvds_data = {
 527         .probe = px30_lvds_probe,
 528         .helper_funcs = &px30_lvds_encoder_helper_funcs,
 529 };
 530
 531 static const struct of_device_id rockchip_lvds_dt_ids[] = {
 532         {
 533                 .compatible = "rockchip,rk3288-lvds",
 534                 .data = &rk3288_lvds_data
 535         },
 536         {
 537                 .compatible = "rockchip,px30-lvds",
 538                 .data = &px30_lvds_data
 539         },
 540         {}
 541 };
 542 MODULE_DEVICE_TABLE(of, rockchip_lvds_dt_ids);
 543
 544 static int rockchip_lvds_bind(struct device *dev, struct device *master,
 545                               void *data)
 546 {
 547         struct rockchip_lvds *lvds = dev_get_drvdata(dev);
 548         struct drm_device *drm_dev = data;
 549         struct drm_encoder *encoder;
 550         struct drm_connector *connector;
 551         struct device_node *remote = NULL;
 552         struct device_node  *port, *endpoint;
 553         int ret = 0, child_count = 0;
 554         const char *name;
 555         u32 endpoint_id = 0;
 556
 557         lvds->drm_dev = drm_dev;
 558         port = of_graph_get_port_by_id(dev->of_node, 1);
 559         if (!port) {
 560                 DRM_DEV_ERROR(dev,
 561                               "can't found port point, please init lvds panel port!\n");
 562                 return -EINVAL;
 563         }
 564         for_each_child_of_node(port, endpoint) {
 565                 child_count++;
 566                 of_property_read_u32(endpoint, "reg", &endpoint_id);
 567                 ret = drm_of_find_panel_or_bridge(dev->of_node, 1, endpoint_id,
 568                                                   &lvds->panel, &lvds->bridge);
 569                 if (!ret) {
 570                         of_node_put(endpoint);
 571                         break;
 572                 }
 573         }
 574         if (!child_count) {
 575                 DRM_DEV_ERROR(dev, "lvds port does not have any children\n");
 576                 ret = -EINVAL;
 577                 goto err_put_port;
 578         } else if (ret) {
 579                 DRM_DEV_ERROR(dev, "failed to find panel and bridge node\n");
 580                 ret = -EPROBE_DEFER;
 581                 goto err_put_port;
 582         }
 583         if (lvds->panel)
 584                 remote = lvds->panel->dev->of_node;
 585         else
 586                 remote = lvds->bridge->of_node;
 587         if (of_property_read_string(dev->of_node, "rockchip,output", &name))
 588                 /* default set it as output rgb */
 589                 lvds->output = DISPLAY_OUTPUT_RGB;
 590         else
 591                 lvds->output = rockchip_lvds_name_to_output(name);
 592
 593         if (lvds->output < 0) {
 594                 DRM_DEV_ERROR(dev, "invalid output type [%s]\n", name);
 595                 ret = lvds->output;
 596                 goto err_put_remote;
 597         }
 598
 599         if (of_property_read_string(remote, "data-mapping", &name))
 600                 /* default set it as format vesa 18 */
 601                 lvds->format = LVDS_VESA_18;
 602         else
 603                 lvds->format = rockchip_lvds_name_to_format(name);
 604
 605         if (lvds->format < 0) {
 606                 DRM_DEV_ERROR(dev, "invalid data-mapping format [%s]\n", name);
 607                 ret = lvds->format;
 608                 goto err_put_remote;
 609         }
 610
 611         encoder = &lvds->encoder.encoder;
 612         encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
 613                                                              dev->of_node);
 614
 615         ret = drm_simple_encoder_init(drm_dev, encoder, DRM_MODE_ENCODER_LVDS);
 616         if (ret < 0) {
 617                 DRM_DEV_ERROR(drm_dev->dev,
 618                               "failed to initialize encoder: %d\n", ret);
 619                 goto err_put_remote;
 620         }
 621
 622         drm_encoder_helper_add(encoder, lvds->soc_data->helper_funcs);
 623         connector = &lvds->connector;
 624
 625         if (lvds->panel) {
 626                 connector->dpms = DRM_MODE_DPMS_OFF;
 627                 ret = drm_connector_init(drm_dev, connector,
 628                                          &rockchip_lvds_connector_funcs,
 629                                          DRM_MODE_CONNECTOR_LVDS);
 630                 if (ret < 0) {
 631                         DRM_DEV_ERROR(drm_dev->dev,
 632                                       "failed to initialize connector: %d\n", ret);
 633                         goto err_free_encoder;
 634                 }
 635
 636                 drm_connector_helper_add(connector,
 637                                          &rockchip_lvds_connector_helper_funcs);
 638         } else {
 639                 ret = drm_bridge_attach(encoder, lvds->bridge, NULL,
 640                                         DRM_BRIDGE_ATTACH_NO_CONNECTOR);
 641                 if (ret)
 642                         goto err_free_encoder;
 643
 644                 connector = drm_bridge_connector_init(lvds->drm_dev, encoder);
 645                 if (IS_ERR(connector)) {
 646                         DRM_DEV_ERROR(drm_dev->dev,
 647                                       "failed to initialize bridge connector: %pe\n",
 648                                       connector);
 649                         ret = PTR_ERR(connector);
 650                         goto err_free_encoder;
 651                 }
 652         }
 653
 654         ret = drm_connector_attach_encoder(connector, encoder);
 655         if (ret < 0) {
 656                 DRM_DEV_ERROR(drm_dev->dev,
 657                               "failed to attach encoder: %d\n", ret);
 658                 goto err_free_connector;
 659         }
 660
 661         pm_runtime_enable(dev);
 662         of_node_put(remote);
 663         of_node_put(port);
 664
 665         return 0;
 666
 667 err_free_connector:
 668         drm_connector_cleanup(connector);
 669 err_free_encoder:
 670         drm_encoder_cleanup(encoder);
 671 err_put_remote:
 672         of_node_put(remote);
 673 err_put_port:
 674         of_node_put(port);
 675
 676         return ret;
 677 }
 678
 679 static void rockchip_lvds_unbind(struct device *dev, struct device *master,
 680                                 void *data)
 681 {
 682         struct rockchip_lvds *lvds = dev_get_drvdata(dev);
 683         const struct drm_encoder_helper_funcs *encoder_funcs;
 684
 685         encoder_funcs = lvds->soc_data->helper_funcs;
 686         encoder_funcs->disable(&lvds->encoder.encoder);
 687         pm_runtime_disable(dev);
 688         drm_connector_cleanup(&lvds->connector);
 689         drm_encoder_cleanup(&lvds->encoder.encoder);
 690 }
 691
 692 static const struct component_ops rockchip_lvds_component_ops = {
 693         .bind = rockchip_lvds_bind,
 694         .unbind = rockchip_lvds_unbind,
 695 };
 696
 697 static int rockchip_lvds_probe(struct platform_device *pdev)
 698 {
 699         struct device *dev = &pdev->dev;
 700         struct rockchip_lvds *lvds;
 701         const struct of_device_id *match;
 702         int ret;
 703
 704         if (!dev->of_node)
 705                 return -ENODEV;
 706
 707         lvds = devm_kzalloc(&pdev->dev, sizeof(*lvds), GFP_KERNEL);
 708         if (!lvds)
 709                 return -ENOMEM;
 710
 711         lvds->dev = dev;
 712         match = of_match_node(rockchip_lvds_dt_ids, dev->of_node);
 713         if (!match)
 714                 return -ENODEV;
 715         lvds->soc_data = match->data;
 716
 717         lvds->grf = syscon_regmap_lookup_by_phandle(dev->of_node,
 718                                                     "rockchip,grf");
 719         if (IS_ERR(lvds->grf)) {
 720                 DRM_DEV_ERROR(dev, "missing rockchip,grf property\n");
 721                 return PTR_ERR(lvds->grf);
 722         }
 723
 724         ret = lvds->soc_data->probe(pdev, lvds);
 725         if (ret) {
 726                 DRM_DEV_ERROR(dev, "Platform initialization failed\n");
 727                 return ret;
 728         }
 729
 730         dev_set_drvdata(dev, lvds);
 731
 732         ret = component_add(&pdev->dev, &rockchip_lvds_component_ops);
 733         if (ret < 0) {
 734                 DRM_DEV_ERROR(dev, "failed to add component\n");
 735                 clk_unprepare(lvds->pclk);
 736         }
 737
 738         return ret;
 739 }
 740
 741 static void rockchip_lvds_remove(struct platform_device *pdev)
 742 {
 743         struct rockchip_lvds *lvds = platform_get_drvdata(pdev);
 744
 745         component_del(&pdev->dev, &rockchip_lvds_component_ops);
 746         clk_unprepare(lvds->pclk);
 747 }
 748
 749 struct platform_driver rockchip_lvds_driver = {
 750         .probe = rockchip_lvds_probe,
 751         .remove_new = rockchip_lvds_remove,
 752         .driver = {
 753                    .name = "rockchip-lvds",
 754                    .of_match_table = rockchip_lvds_dt_ids,
 755         },
 756 };