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