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, 0); 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 }; 757