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_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 int 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 return 0; 750 } 751 752 struct platform_driver rockchip_lvds_driver = { 753 .probe = rockchip_lvds_probe, 754 .remove = rockchip_lvds_remove, 755 .driver = { 756 .name = "rockchip-lvds", 757 .of_match_table = of_match_ptr(rockchip_lvds_dt_ids), 758 }, 759 }; 760