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 <[email protected]>
   6  *      Sandy Huang <[email protected]>
   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_drm_vop.h"
  31 #include "rockchip_lvds.h"
  32
  33 #define DISPLAY_OUTPUT_RGB              0
  34 #define DISPLAY_OUTPUT_LVDS             1
  35 #define DISPLAY_OUTPUT_DUAL_LVDS        2
  36
  37 struct rockchip_lvds;
  38
  39 /**
  40  * struct rockchip_lvds_soc_data - rockchip lvds Soc private data
  41  * @probe: LVDS platform probe function
  42  * @helper_funcs: LVDS connector helper functions
  43  */
  44 struct rockchip_lvds_soc_data {
  45         int (*probe)(struct platform_device *pdev, struct rockchip_lvds *lvds);
  46         const struct drm_encoder_helper_funcs *helper_funcs;
  47 };
  48
  49 struct rockchip_lvds {
  50         struct device *dev;
  51         void __iomem *regs;
  52         struct regmap *grf;
  53         struct clk *pclk;
  54         struct phy *dphy;
  55         const struct rockchip_lvds_soc_data *soc_data;
  56         int output; /* rgb lvds or dual lvds output */
  57         int format; /* vesa or jeida format */
  58         struct drm_device *drm_dev;
  59         struct drm_panel *panel;
  60         struct drm_bridge *bridge;
  61         struct drm_connector connector;
  62         struct rockchip_encoder encoder;
  63         struct dev_pin_info *pins;
  64 };
  65
  66 static inline struct rockchip_lvds *connector_to_lvds(struct drm_connector *connector)
  67 {
  68         return container_of(connector, struct rockchip_lvds, connector);
  69 }
  70
  71 static inline struct rockchip_lvds *encoder_to_lvds(struct drm_encoder *encoder)
  72 {
  73         struct rockchip_encoder *rkencoder = to_rockchip_encoder(encoder);
  74
  75         return container_of(rkencoder, struct rockchip_lvds, encoder);
  76 }
  77
  78 static inline void rk3288_writel(struct rockchip_lvds *lvds, u32 offset,
  79                                  u32 val)
  80 {
  81         writel_relaxed(val, lvds->regs + offset);
  82         if (lvds->output == DISPLAY_OUTPUT_LVDS)
  83                 return;
  84         writel_relaxed(val, lvds->regs + offset + RK3288_LVDS_CH1_OFFSET);
  85 }
  86
  87 static inline int rockchip_lvds_name_to_format(const char *s)
  88 {
  89         if (strncmp(s, "jeida-18", 8) == 0)
  90                 return LVDS_JEIDA_18;
  91         else if (strncmp(s, "jeida-24", 8) == 0)
  92                 return LVDS_JEIDA_24;
  93         else if (strncmp(s, "vesa-24", 7) == 0)
  94                 return LVDS_VESA_24;
  95
  96         return -EINVAL;
  97 }
  98
  99 static inline int rockchip_lvds_name_to_output(const char *s)
 100 {
 101         if (strncmp(s, "rgb", 3) == 0)
 102                 return DISPLAY_OUTPUT_RGB;
 103         else if (strncmp(s, "lvds", 4) == 0)
 104                 return DISPLAY_OUTPUT_LVDS;
 105         else if (strncmp(s, "duallvds", 8) == 0)
 106                 return DISPLAY_OUTPUT_DUAL_LVDS;
 107
 108         return -EINVAL;
 109 }
 110
 111 static const struct drm_connector_funcs rockchip_lvds_connector_funcs = {
 112         .fill_modes = drm_helper_probe_single_connector_modes,
 113         .destroy = drm_connector_cleanup,
 114         .reset = drm_atomic_helper_connector_reset,
 115         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 116         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 117 };
 118
 119 static int rockchip_lvds_connector_get_modes(struct drm_connector *connector)
 120 {
 121         struct rockchip_lvds *lvds = connector_to_lvds(connector);
 122         struct drm_panel *panel = lvds->panel;
 123
 124         return drm_panel_get_modes(panel, connector);
 125 }
 126
 127 static const
 128 struct drm_connector_helper_funcs rockchip_lvds_connector_helper_funcs = {
 129         .get_modes = rockchip_lvds_connector_get_modes,
 130 };
 131
 132 static int
 133 rockchip_lvds_encoder_atomic_check(struct drm_encoder *encoder,
 134                                    struct drm_crtc_state *crtc_state,
 135                                    struct drm_connector_state *conn_state)
 136 {
 137         struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
 138
 139         s->output_mode = ROCKCHIP_OUT_MODE_P888;
 140         s->output_type = DRM_MODE_CONNECTOR_LVDS;
 141
 142         return 0;
 143 }
 144
 145 static int rk3288_lvds_poweron(struct rockchip_lvds *lvds)
 146 {
 147         int ret;
 148         u32 val;
 149
 150         ret = clk_enable(lvds->pclk);
 151         if (ret < 0) {
 152                 DRM_DEV_ERROR(lvds->dev, "failed to enable lvds pclk %d\n", ret);
 153                 return ret;
 154         }
 155         ret = pm_runtime_resume_and_get(lvds->dev);
 156         if (ret < 0) {
 157                 DRM_DEV_ERROR(lvds->dev, "failed to get pm runtime: %d\n", ret);
 158                 clk_disable(lvds->pclk);
 159                 return ret;
 160         }
 161         val = RK3288_LVDS_CH0_REG0_LANE4_EN | RK3288_LVDS_CH0_REG0_LANE3_EN |
 162                 RK3288_LVDS_CH0_REG0_LANE2_EN | RK3288_LVDS_CH0_REG0_LANE1_EN |
 163                 RK3288_LVDS_CH0_REG0_LANE0_EN;
 164         if (lvds->output == DISPLAY_OUTPUT_RGB) {
 165                 val |= RK3288_LVDS_CH0_REG0_TTL_EN |
 166                         RK3288_LVDS_CH0_REG0_LANECK_EN;
 167                 rk3288_writel(lvds, RK3288_LVDS_CH0_REG0, val);
 168                 rk3288_writel(lvds, RK3288_LVDS_CH0_REG2,
 169                               RK3288_LVDS_PLL_FBDIV_REG2(0x46));
 170                 rk3288_writel(lvds, RK3288_LVDS_CH0_REG4,
 171                               RK3288_LVDS_CH0_REG4_LANECK_TTL_MODE |
 172                               RK3288_LVDS_CH0_REG4_LANE4_TTL_MODE |
 173                               RK3288_LVDS_CH0_REG4_LANE3_TTL_MODE |
 174                               RK3288_LVDS_CH0_REG4_LANE2_TTL_MODE |
 175                               RK3288_LVDS_CH0_REG4_LANE1_TTL_MODE |
 176                               RK3288_LVDS_CH0_REG4_LANE0_TTL_MODE);
 177                 rk3288_writel(lvds, RK3288_LVDS_CH0_REG5,
 178                               RK3288_LVDS_CH0_REG5_LANECK_TTL_DATA |
 179                               RK3288_LVDS_CH0_REG5_LANE4_TTL_DATA |
 180                               RK3288_LVDS_CH0_REG5_LANE3_TTL_DATA |
 181                               RK3288_LVDS_CH0_REG5_LANE2_TTL_DATA |
 182                               RK3288_LVDS_CH0_REG5_LANE1_TTL_DATA |
 183                               RK3288_LVDS_CH0_REG5_LANE0_TTL_DATA);
 184         } else {
 185                 val |= RK3288_LVDS_CH0_REG0_LVDS_EN |
 186                             RK3288_LVDS_CH0_REG0_LANECK_EN;
 187                 rk3288_writel(lvds, RK3288_LVDS_CH0_REG0, val);
 188                 rk3288_writel(lvds, RK3288_LVDS_CH0_REG1,
 189                               RK3288_LVDS_CH0_REG1_LANECK_BIAS |
 190                               RK3288_LVDS_CH0_REG1_LANE4_BIAS |
 191                               RK3288_LVDS_CH0_REG1_LANE3_BIAS |
 192                               RK3288_LVDS_CH0_REG1_LANE2_BIAS |
 193                               RK3288_LVDS_CH0_REG1_LANE1_BIAS |
 194                               RK3288_LVDS_CH0_REG1_LANE0_BIAS);
 195                 rk3288_writel(lvds, RK3288_LVDS_CH0_REG2,
 196                               RK3288_LVDS_CH0_REG2_RESERVE_ON |
 197                               RK3288_LVDS_CH0_REG2_LANECK_LVDS_MODE |
 198                               RK3288_LVDS_CH0_REG2_LANE4_LVDS_MODE |
 199                               RK3288_LVDS_CH0_REG2_LANE3_LVDS_MODE |
 200                               RK3288_LVDS_CH0_REG2_LANE2_LVDS_MODE |
 201                               RK3288_LVDS_CH0_REG2_LANE1_LVDS_MODE |
 202                               RK3288_LVDS_CH0_REG2_LANE0_LVDS_MODE |
 203                               RK3288_LVDS_PLL_FBDIV_REG2(0x46));
 204                 rk3288_writel(lvds, RK3288_LVDS_CH0_REG4, 0x00);
 205                 rk3288_writel(lvds, RK3288_LVDS_CH0_REG5, 0x00);
 206         }
 207         rk3288_writel(lvds, RK3288_LVDS_CH0_REG3,
 208                       RK3288_LVDS_PLL_FBDIV_REG3(0x46));
 209         rk3288_writel(lvds, RK3288_LVDS_CH0_REGD,
 210                       RK3288_LVDS_PLL_PREDIV_REGD(0x0a));
 211         rk3288_writel(lvds, RK3288_LVDS_CH0_REG20,
 212                       RK3288_LVDS_CH0_REG20_LSB);
 213
 214         rk3288_writel(lvds, RK3288_LVDS_CFG_REGC,
 215                       RK3288_LVDS_CFG_REGC_PLL_ENABLE);
 216         rk3288_writel(lvds, RK3288_LVDS_CFG_REG21,
 217                       RK3288_LVDS_CFG_REG21_TX_ENABLE);
 218
 219         return 0;
 220 }
 221
 222 static void rk3288_lvds_poweroff(struct rockchip_lvds *lvds)
 223 {
 224         int ret;
 225         u32 val;
 226
 227         rk3288_writel(lvds, RK3288_LVDS_CFG_REG21,
 228                       RK3288_LVDS_CFG_REG21_TX_ENABLE);
 229         rk3288_writel(lvds, RK3288_LVDS_CFG_REGC,
 230                       RK3288_LVDS_CFG_REGC_PLL_ENABLE);
 231         val = LVDS_DUAL | LVDS_TTL_EN | LVDS_CH0_EN | LVDS_CH1_EN | LVDS_PWRDN;
 232         val |= val << 16;
 233         ret = regmap_write(lvds->grf, RK3288_LVDS_GRF_SOC_CON7, val);
 234         if (ret != 0)
 235                 DRM_DEV_ERROR(lvds->dev, "Could not write to GRF: %d\n", ret);
 236
 237         pm_runtime_put(lvds->dev);
 238         clk_disable(lvds->pclk);
 239 }
 240
 241 static int rk3288_lvds_grf_config(struct drm_encoder *encoder,
 242                                   struct drm_display_mode *mode)
 243 {
 244         struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
 245         u8 pin_hsync = (mode->flags & DRM_MODE_FLAG_PHSYNC) ? 1 : 0;
 246         u8 pin_dclk = (mode->flags & DRM_MODE_FLAG_PCSYNC) ? 1 : 0;
 247         u32 val;
 248         int ret;
 249
 250         /* iomux to LCD data/sync mode */
 251         if (lvds->output == DISPLAY_OUTPUT_RGB)
 252                 if (lvds->pins && !IS_ERR(lvds->pins->default_state))
 253                         pinctrl_select_state(lvds->pins->p,
 254                                              lvds->pins->default_state);
 255         val = lvds->format | LVDS_CH0_EN;
 256         if (lvds->output == DISPLAY_OUTPUT_RGB)
 257                 val |= LVDS_TTL_EN | LVDS_CH1_EN;
 258         else if (lvds->output == DISPLAY_OUTPUT_DUAL_LVDS)
 259                 val |= LVDS_DUAL | LVDS_CH1_EN;
 260
 261         if ((mode->htotal - mode->hsync_start) & 0x01)
 262                 val |= LVDS_START_PHASE_RST_1;
 263
 264         val |= (pin_dclk << 8) | (pin_hsync << 9);
 265         val |= (0xffff << 16);
 266         ret = regmap_write(lvds->grf, RK3288_LVDS_GRF_SOC_CON7, val);
 267         if (ret)
 268                 DRM_DEV_ERROR(lvds->dev, "Could not write to GRF: %d\n", ret);
 269
 270         return ret;
 271 }
 272
 273 static int rk3288_lvds_set_vop_source(struct rockchip_lvds *lvds,
 274                                       struct drm_encoder *encoder)
 275 {
 276         u32 val;
 277         int ret;
 278
 279         ret = drm_of_encoder_active_endpoint_id(lvds->dev->of_node, encoder);
 280         if (ret < 0)
 281                 return ret;
 282
 283         val = RK3288_LVDS_SOC_CON6_SEL_VOP_LIT << 16;
 284         if (ret)
 285                 val |= RK3288_LVDS_SOC_CON6_SEL_VOP_LIT;
 286
 287         ret = regmap_write(lvds->grf, RK3288_LVDS_GRF_SOC_CON6, val);
 288         if (ret < 0)
 289                 return ret;
 290
 291         return 0;
 292 }
 293
 294 static void rk3288_lvds_encoder_enable(struct drm_encoder *encoder)
 295 {
 296         struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
 297         struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
 298         int ret;
 299
 300         drm_panel_prepare(lvds->panel);
 301
 302         ret = rk3288_lvds_poweron(lvds);
 303         if (ret < 0) {
 304                 DRM_DEV_ERROR(lvds->dev, "failed to power on LVDS: %d\n", ret);
 305                 drm_panel_unprepare(lvds->panel);
 306                 return;
 307         }
 308
 309         ret = rk3288_lvds_grf_config(encoder, mode);
 310         if (ret) {
 311                 DRM_DEV_ERROR(lvds->dev, "failed to configure LVDS: %d\n", ret);
 312                 drm_panel_unprepare(lvds->panel);
 313                 return;
 314         }
 315
 316         ret = rk3288_lvds_set_vop_source(lvds, encoder);
 317         if (ret) {
 318                 DRM_DEV_ERROR(lvds->dev, "failed to set VOP source: %d\n", ret);
 319                 drm_panel_unprepare(lvds->panel);
 320                 return;
 321         }
 322
 323         drm_panel_enable(lvds->panel);
 324 }
 325
 326 static void rk3288_lvds_encoder_disable(struct drm_encoder *encoder)
 327 {
 328         struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
 329
 330         drm_panel_disable(lvds->panel);
 331         rk3288_lvds_poweroff(lvds);
 332         drm_panel_unprepare(lvds->panel);
 333 }
 334
 335 static int px30_lvds_poweron(struct rockchip_lvds *lvds)
 336 {
 337         int ret;
 338
 339         ret = pm_runtime_resume_and_get(lvds->dev);
 340         if (ret < 0) {
 341                 DRM_DEV_ERROR(lvds->dev, "failed to get pm runtime: %d\n", ret);
 342                 return ret;
 343         }
 344
 345         /* Enable LVDS mode */
 346         ret = regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1,
 347                                   PX30_LVDS_MODE_EN(1) | PX30_LVDS_P2S_EN(1),
 348                                   PX30_LVDS_MODE_EN(1) | PX30_LVDS_P2S_EN(1));
 349         if (ret)
 350                 pm_runtime_put(lvds->dev);
 351
 352         return ret;
 353 }
 354
 355 static void px30_lvds_poweroff(struct rockchip_lvds *lvds)
 356 {
 357         regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1,
 358                            PX30_LVDS_MODE_EN(1) | PX30_LVDS_P2S_EN(1),
 359                            PX30_LVDS_MODE_EN(0) | PX30_LVDS_P2S_EN(0));
 360
 361         pm_runtime_put(lvds->dev);
 362 }
 363
 364 static int px30_lvds_grf_config(struct drm_encoder *encoder,
 365                                 struct drm_display_mode *mode)
 366 {
 367         struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
 368
 369         if (lvds->output != DISPLAY_OUTPUT_LVDS) {
 370                 DRM_DEV_ERROR(lvds->dev, "Unsupported display output %d\n",
 371                               lvds->output);
 372                 return -EINVAL;
 373         }
 374
 375         /* Set format */
 376         return regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1,
 377                                   PX30_LVDS_FORMAT(lvds->format),
 378                                   PX30_LVDS_FORMAT(lvds->format));
 379 }
 380
 381 static int px30_lvds_set_vop_source(struct rockchip_lvds *lvds,
 382                                     struct drm_encoder *encoder)
 383 {
 384         int vop;
 385
 386         vop = drm_of_encoder_active_endpoint_id(lvds->dev->of_node, encoder);
 387         if (vop < 0)
 388                 return vop;
 389
 390         return regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1,
 391                                   PX30_LVDS_VOP_SEL(1),
 392                                   PX30_LVDS_VOP_SEL(vop));
 393 }
 394
 395 static void px30_lvds_encoder_enable(struct drm_encoder *encoder)
 396 {
 397         struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
 398         struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
 399         int ret;
 400
 401         drm_panel_prepare(lvds->panel);
 402
 403         ret = px30_lvds_poweron(lvds);
 404         if (ret) {
 405                 DRM_DEV_ERROR(lvds->dev, "failed to power on LVDS: %d\n", ret);
 406                 drm_panel_unprepare(lvds->panel);
 407                 return;
 408         }
 409
 410         ret = px30_lvds_grf_config(encoder, mode);
 411         if (ret) {
 412                 DRM_DEV_ERROR(lvds->dev, "failed to configure LVDS: %d\n", ret);
 413                 drm_panel_unprepare(lvds->panel);
 414                 return;
 415         }
 416
 417         ret = px30_lvds_set_vop_source(lvds, encoder);
 418         if (ret) {
 419                 DRM_DEV_ERROR(lvds->dev, "failed to set VOP source: %d\n", ret);
 420                 drm_panel_unprepare(lvds->panel);
 421                 return;
 422         }
 423
 424         drm_panel_enable(lvds->panel);
 425 }
 426
 427 static void px30_lvds_encoder_disable(struct drm_encoder *encoder)
 428 {
 429         struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
 430
 431         drm_panel_disable(lvds->panel);
 432         px30_lvds_poweroff(lvds);
 433         drm_panel_unprepare(lvds->panel);
 434 }
 435
 436 static const
 437 struct drm_encoder_helper_funcs rk3288_lvds_encoder_helper_funcs = {
 438         .enable = rk3288_lvds_encoder_enable,
 439         .disable = rk3288_lvds_encoder_disable,
 440         .atomic_check = rockchip_lvds_encoder_atomic_check,
 441 };
 442
 443 static const
 444 struct drm_encoder_helper_funcs px30_lvds_encoder_helper_funcs = {
 445         .enable = px30_lvds_encoder_enable,
 446         .disable = px30_lvds_encoder_disable,
 447         .atomic_check = rockchip_lvds_encoder_atomic_check,
 448 };
 449
 450 static int rk3288_lvds_probe(struct platform_device *pdev,
 451                              struct rockchip_lvds *lvds)
 452 {
 453         int ret;
 454
 455         lvds->regs = devm_platform_ioremap_resource(pdev, 0);
 456         if (IS_ERR(lvds->regs))
 457                 return PTR_ERR(lvds->regs);
 458
 459         lvds->pclk = devm_clk_get(lvds->dev, "pclk_lvds");
 460         if (IS_ERR(lvds->pclk)) {
 461                 DRM_DEV_ERROR(lvds->dev, "could not get pclk_lvds\n");
 462                 return PTR_ERR(lvds->pclk);
 463         }
 464
 465         lvds->pins = devm_kzalloc(lvds->dev, sizeof(*lvds->pins),
 466                                   GFP_KERNEL);
 467         if (!lvds->pins)
 468                 return -ENOMEM;
 469
 470         lvds->pins->p = devm_pinctrl_get(lvds->dev);
 471         if (IS_ERR(lvds->pins->p)) {
 472                 DRM_DEV_ERROR(lvds->dev, "no pinctrl handle\n");
 473                 devm_kfree(lvds->dev, lvds->pins);
 474                 lvds->pins = NULL;
 475         } else {
 476                 lvds->pins->default_state =
 477                         pinctrl_lookup_state(lvds->pins->p, "lcdc");
 478                 if (IS_ERR(lvds->pins->default_state)) {
 479                         DRM_DEV_ERROR(lvds->dev, "no default pinctrl state\n");
 480                         devm_kfree(lvds->dev, lvds->pins);
 481                         lvds->pins = NULL;
 482                 }
 483         }
 484
 485         ret = clk_prepare(lvds->pclk);
 486         if (ret < 0) {
 487                 DRM_DEV_ERROR(lvds->dev, "failed to prepare pclk_lvds\n");
 488                 return ret;
 489         }
 490
 491         return 0;
 492 }
 493
 494 static int px30_lvds_probe(struct platform_device *pdev,
 495                            struct rockchip_lvds *lvds)
 496 {
 497         int ret;
 498
 499         /* MSB */
 500         ret =  regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1,
 501                                   PX30_LVDS_MSBSEL(1),
 502                                   PX30_LVDS_MSBSEL(1));
 503         if (ret)
 504                 return ret;
 505
 506         /* PHY */
 507         lvds->dphy = devm_phy_get(&pdev->dev, "dphy");
 508         if (IS_ERR(lvds->dphy))
 509                 return PTR_ERR(lvds->dphy);
 510
 511         ret = phy_init(lvds->dphy);
 512         if (ret)
 513                 return ret;
 514
 515         ret = phy_set_mode(lvds->dphy, PHY_MODE_LVDS);
 516         if (ret)
 517                 return ret;
 518
 519         return phy_power_on(lvds->dphy);
 520 }
 521
 522 static const struct rockchip_lvds_soc_data rk3288_lvds_data = {
 523         .probe = rk3288_lvds_probe,
 524         .helper_funcs = &rk3288_lvds_encoder_helper_funcs,
 525 };
 526
 527 static const struct rockchip_lvds_soc_data px30_lvds_data = {
 528         .probe = px30_lvds_probe,
 529         .helper_funcs = &px30_lvds_encoder_helper_funcs,
 530 };
 531
 532 static const struct of_device_id rockchip_lvds_dt_ids[] = {
 533         {
 534                 .compatible = "rockchip,rk3288-lvds",
 535                 .data = &rk3288_lvds_data
 536         },
 537         {
 538                 .compatible = "rockchip,px30-lvds",
 539                 .data = &px30_lvds_data
 540         },
 541         {}
 542 };
 543 MODULE_DEVICE_TABLE(of, rockchip_lvds_dt_ids);
 544
 545 static int rockchip_lvds_bind(struct device *dev, struct device *master,
 546                               void *data)
 547 {
 548         struct rockchip_lvds *lvds = dev_get_drvdata(dev);
 549         struct drm_device *drm_dev = data;
 550         struct drm_encoder *encoder;
 551         struct drm_connector *connector;
 552         struct device_node *remote = NULL;
 553         struct device_node  *port, *endpoint;
 554         int ret = 0, child_count = 0;
 555         const char *name;
 556         u32 endpoint_id = 0;
 557
 558         lvds->drm_dev = drm_dev;
 559         port = of_graph_get_port_by_id(dev->of_node, 1);
 560         if (!port) {
 561                 DRM_DEV_ERROR(dev,
 562                               "can't found port point, please init lvds panel port!\n");
 563                 return -EINVAL;
 564         }
 565         for_each_child_of_node(port, endpoint) {
 566                 child_count++;
 567                 of_property_read_u32(endpoint, "reg", &endpoint_id);
 568                 ret = drm_of_find_panel_or_bridge(dev->of_node, 1, endpoint_id,
 569                                                   &lvds->panel, &lvds->bridge);
 570                 if (!ret) {
 571                         of_node_put(endpoint);
 572                         break;
 573                 }
 574         }
 575         if (!child_count) {
 576                 DRM_DEV_ERROR(dev, "lvds port does not have any children\n");
 577                 ret = -EINVAL;
 578                 goto err_put_port;
 579         } else if (ret) {
 580                 DRM_DEV_ERROR(dev, "failed to find panel and bridge node\n");
 581                 ret = -EPROBE_DEFER;
 582                 goto err_put_port;
 583         }
 584         if (lvds->panel)
 585                 remote = lvds->panel->dev->of_node;
 586         else
 587                 remote = lvds->bridge->of_node;
 588         if (of_property_read_string(dev->of_node, "rockchip,output", &name))
 589                 /* default set it as output rgb */
 590                 lvds->output = DISPLAY_OUTPUT_RGB;
 591         else
 592                 lvds->output = rockchip_lvds_name_to_output(name);
 593
 594         if (lvds->output < 0) {
 595                 DRM_DEV_ERROR(dev, "invalid output type [%s]\n", name);
 596                 ret = lvds->output;
 597                 goto err_put_remote;
 598         }
 599
 600         if (of_property_read_string(remote, "data-mapping", &name))
 601                 /* default set it as format vesa 18 */
 602                 lvds->format = LVDS_VESA_18;
 603         else
 604                 lvds->format = rockchip_lvds_name_to_format(name);
 605
 606         if (lvds->format < 0) {
 607                 DRM_DEV_ERROR(dev, "invalid data-mapping format [%s]\n", name);
 608                 ret = lvds->format;
 609                 goto err_put_remote;
 610         }
 611
 612         encoder = &lvds->encoder.encoder;
 613         encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
 614                                                              dev->of_node);
 615
 616         ret = drm_simple_encoder_init(drm_dev, encoder, DRM_MODE_ENCODER_LVDS);
 617         if (ret < 0) {
 618                 DRM_DEV_ERROR(drm_dev->dev,
 619                               "failed to initialize encoder: %d\n", ret);
 620                 goto err_put_remote;
 621         }
 622
 623         drm_encoder_helper_add(encoder, lvds->soc_data->helper_funcs);
 624         connector = &lvds->connector;
 625
 626         if (lvds->panel) {
 627                 connector->dpms = DRM_MODE_DPMS_OFF;
 628                 ret = drm_connector_init(drm_dev, connector,
 629                                          &rockchip_lvds_connector_funcs,
 630                                          DRM_MODE_CONNECTOR_LVDS);
 631                 if (ret < 0) {
 632                         DRM_DEV_ERROR(drm_dev->dev,
 633                                       "failed to initialize connector: %d\n", ret);
 634                         goto err_free_encoder;
 635                 }
 636
 637                 drm_connector_helper_add(connector,
 638                                          &rockchip_lvds_connector_helper_funcs);
 639         } else {
 640                 ret = drm_bridge_attach(encoder, lvds->bridge, NULL,
 641                                         DRM_BRIDGE_ATTACH_NO_CONNECTOR);
 642                 if (ret)
 643                         goto err_free_encoder;
 644
 645                 connector = drm_bridge_connector_init(lvds->drm_dev, encoder);
 646                 if (IS_ERR(connector)) {
 647                         DRM_DEV_ERROR(drm_dev->dev,
 648                                       "failed to initialize bridge connector: %pe\n",
 649                                       connector);
 650                         ret = PTR_ERR(connector);
 651                         goto err_free_encoder;
 652                 }
 653         }
 654
 655         ret = drm_connector_attach_encoder(connector, encoder);
 656         if (ret < 0) {
 657                 DRM_DEV_ERROR(drm_dev->dev,
 658                               "failed to attach encoder: %d\n", ret);
 659                 goto err_free_connector;
 660         }
 661
 662         pm_runtime_enable(dev);
 663         of_node_put(remote);
 664         of_node_put(port);
 665
 666         return 0;
 667
 668 err_free_connector:
 669         drm_connector_cleanup(connector);
 670 err_free_encoder:
 671         drm_encoder_cleanup(encoder);
 672 err_put_remote:
 673         of_node_put(remote);
 674 err_put_port:
 675         of_node_put(port);
 676
 677         return ret;
 678 }
 679
 680 static void rockchip_lvds_unbind(struct device *dev, struct device *master,
 681                                 void *data)
 682 {
 683         struct rockchip_lvds *lvds = dev_get_drvdata(dev);
 684         const struct drm_encoder_helper_funcs *encoder_funcs;
 685
 686         encoder_funcs = lvds->soc_data->helper_funcs;
 687         encoder_funcs->disable(&lvds->encoder.encoder);
 688         pm_runtime_disable(dev);
 689         drm_connector_cleanup(&lvds->connector);
 690         drm_encoder_cleanup(&lvds->encoder.encoder);
 691 }
 692
 693 static const struct component_ops rockchip_lvds_component_ops = {
 694         .bind = rockchip_lvds_bind,
 695         .unbind = rockchip_lvds_unbind,
 696 };
 697
 698 static int rockchip_lvds_probe(struct platform_device *pdev)
 699 {
 700         struct device *dev = &pdev->dev;
 701         struct rockchip_lvds *lvds;
 702         const struct of_device_id *match;
 703         int ret;
 704
 705         if (!dev->of_node)
 706                 return -ENODEV;
 707
 708         lvds = devm_kzalloc(&pdev->dev, sizeof(*lvds), GFP_KERNEL);
 709         if (!lvds)
 710                 return -ENOMEM;
 711
 712         lvds->dev = dev;
 713         match = of_match_node(rockchip_lvds_dt_ids, dev->of_node);
 714         if (!match)
 715                 return -ENODEV;
 716         lvds->soc_data = match->data;
 717
 718         lvds->grf = syscon_regmap_lookup_by_phandle(dev->of_node,
 719                                                     "rockchip,grf");
 720         if (IS_ERR(lvds->grf)) {
 721                 DRM_DEV_ERROR(dev, "missing rockchip,grf property\n");
 722                 return PTR_ERR(lvds->grf);
 723         }
 724
 725         ret = lvds->soc_data->probe(pdev, lvds);
 726         if (ret) {
 727                 DRM_DEV_ERROR(dev, "Platform initialization failed\n");
 728                 return ret;
 729         }
 730
 731         dev_set_drvdata(dev, lvds);
 732
 733         ret = component_add(&pdev->dev, &rockchip_lvds_component_ops);
 734         if (ret < 0) {
 735                 DRM_DEV_ERROR(dev, "failed to add component\n");
 736                 clk_unprepare(lvds->pclk);
 737         }
 738
 739         return ret;
 740 }
 741
 742 static void rockchip_lvds_remove(struct platform_device *pdev)
 743 {
 744         struct rockchip_lvds *lvds = platform_get_drvdata(pdev);
 745
 746         component_del(&pdev->dev, &rockchip_lvds_component_ops);
 747         clk_unprepare(lvds->pclk);
 748 }
 749
 750 struct platform_driver rockchip_lvds_driver = {
 751         .probe = rockchip_lvds_probe,
 752         .remove_new = rockchip_lvds_remove,
 753         .driver = {
 754                    .name = "rockchip-lvds",
 755                    .of_match_table = rockchip_lvds_dt_ids,
 756         },
 757 };