1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd 4 * Author: 5 * Mark Yao <mark.yao@rock-chips.com> 6 * Sandy Huang <hjc@rock-chips.com> 7 */ 8 9 #include <linux/clk.h> 10 #include <linux/component.h> 11 #include <linux/mfd/syscon.h> 12 #include <linux/of_graph.h> 13 #include <linux/phy/phy.h> 14 #include <linux/pinctrl/devinfo.h> 15 #include <linux/platform_device.h> 16 #include <linux/pm_runtime.h> 17 #include <linux/regmap.h> 18 #include <linux/reset.h> 19 20 #include <drm/display/drm_dp_helper.h> 21 #include <drm/drm_atomic_helper.h> 22 #include <drm/drm_bridge.h> 23 #include <drm/drm_bridge_connector.h> 24 #include <drm/drm_of.h> 25 #include <drm/drm_panel.h> 26 #include <drm/drm_probe_helper.h> 27 #include <drm/drm_simple_kms_helper.h> 28 29 #include "rockchip_drm_drv.h" 30 #include "rockchip_lvds.h" 31 32 #define DISPLAY_OUTPUT_RGB 0 33 #define DISPLAY_OUTPUT_LVDS 1 34 #define DISPLAY_OUTPUT_DUAL_LVDS 2 35 36 struct rockchip_lvds; 37 38 /** 39 * struct rockchip_lvds_soc_data - rockchip lvds Soc private data 40 * @probe: LVDS platform probe function 41 * @helper_funcs: LVDS connector helper functions 42 */ 43 struct rockchip_lvds_soc_data { 44 int (*probe)(struct platform_device *pdev, struct rockchip_lvds *lvds); 45 const struct drm_encoder_helper_funcs *helper_funcs; 46 }; 47 48 struct rockchip_lvds { 49 struct device *dev; 50 void __iomem *regs; 51 struct regmap *grf; 52 struct clk *pclk; 53 struct phy *dphy; 54 const struct rockchip_lvds_soc_data *soc_data; 55 int output; /* rgb lvds or dual lvds output */ 56 int format; /* vesa or jeida format */ 57 struct drm_device *drm_dev; 58 struct drm_panel *panel; 59 struct drm_bridge *bridge; 60 struct drm_connector connector; 61 struct rockchip_encoder encoder; 62 struct dev_pin_info *pins; 63 }; 64 65 static inline struct rockchip_lvds *connector_to_lvds(struct drm_connector *connector) 66 { 67 return container_of(connector, struct rockchip_lvds, connector); 68 } 69 70 static inline struct rockchip_lvds *encoder_to_lvds(struct drm_encoder *encoder) 71 { 72 struct rockchip_encoder *rkencoder = to_rockchip_encoder(encoder); 73 74 return container_of(rkencoder, struct rockchip_lvds, encoder); 75 } 76 77 static inline void rk3288_writel(struct rockchip_lvds *lvds, u32 offset, 78 u32 val) 79 { 80 writel_relaxed(val, lvds->regs + offset); 81 if (lvds->output == DISPLAY_OUTPUT_LVDS) 82 return; 83 writel_relaxed(val, lvds->regs + offset + RK3288_LVDS_CH1_OFFSET); 84 } 85 86 static inline int rockchip_lvds_name_to_format(const char *s) 87 { 88 if (strncmp(s, "jeida-18", 8) == 0) 89 return LVDS_JEIDA_18; 90 else if (strncmp(s, "jeida-24", 8) == 0) 91 return LVDS_JEIDA_24; 92 else if (strncmp(s, "vesa-24", 7) == 0) 93 return LVDS_VESA_24; 94 95 return -EINVAL; 96 } 97 98 static inline int rockchip_lvds_name_to_output(const char *s) 99 { 100 if (strncmp(s, "rgb", 3) == 0) 101 return DISPLAY_OUTPUT_RGB; 102 else if (strncmp(s, "lvds", 4) == 0) 103 return DISPLAY_OUTPUT_LVDS; 104 else if (strncmp(s, "duallvds", 8) == 0) 105 return DISPLAY_OUTPUT_DUAL_LVDS; 106 107 return -EINVAL; 108 } 109 110 static const struct drm_connector_funcs rockchip_lvds_connector_funcs = { 111 .fill_modes = drm_helper_probe_single_connector_modes, 112 .destroy = drm_connector_cleanup, 113 .reset = drm_atomic_helper_connector_reset, 114 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 115 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 116 }; 117 118 static int rockchip_lvds_connector_get_modes(struct drm_connector *connector) 119 { 120 struct rockchip_lvds *lvds = connector_to_lvds(connector); 121 struct drm_panel *panel = lvds->panel; 122 123 return drm_panel_get_modes(panel, connector); 124 } 125 126 static const 127 struct drm_connector_helper_funcs rockchip_lvds_connector_helper_funcs = { 128 .get_modes = rockchip_lvds_connector_get_modes, 129 }; 130 131 static int 132 rockchip_lvds_encoder_atomic_check(struct drm_encoder *encoder, 133 struct drm_crtc_state *crtc_state, 134 struct drm_connector_state *conn_state) 135 { 136 struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state); 137 138 s->output_mode = ROCKCHIP_OUT_MODE_P888; 139 s->output_type = DRM_MODE_CONNECTOR_LVDS; 140 141 return 0; 142 } 143 144 static int rk3288_lvds_poweron(struct rockchip_lvds *lvds) 145 { 146 int ret; 147 u32 val; 148 149 ret = clk_enable(lvds->pclk); 150 if (ret < 0) { 151 DRM_DEV_ERROR(lvds->dev, "failed to enable lvds pclk %d\n", ret); 152 return ret; 153 } 154 ret = pm_runtime_resume_and_get(lvds->dev); 155 if (ret < 0) { 156 DRM_DEV_ERROR(lvds->dev, "failed to get pm runtime: %d\n", ret); 157 clk_disable(lvds->pclk); 158 return ret; 159 } 160 val = RK3288_LVDS_CH0_REG0_LANE4_EN | RK3288_LVDS_CH0_REG0_LANE3_EN | 161 RK3288_LVDS_CH0_REG0_LANE2_EN | RK3288_LVDS_CH0_REG0_LANE1_EN | 162 RK3288_LVDS_CH0_REG0_LANE0_EN; 163 if (lvds->output == DISPLAY_OUTPUT_RGB) { 164 val |= RK3288_LVDS_CH0_REG0_TTL_EN | 165 RK3288_LVDS_CH0_REG0_LANECK_EN; 166 rk3288_writel(lvds, RK3288_LVDS_CH0_REG0, val); 167 rk3288_writel(lvds, RK3288_LVDS_CH0_REG2, 168 RK3288_LVDS_PLL_FBDIV_REG2(0x46)); 169 rk3288_writel(lvds, RK3288_LVDS_CH0_REG4, 170 RK3288_LVDS_CH0_REG4_LANECK_TTL_MODE | 171 RK3288_LVDS_CH0_REG4_LANE4_TTL_MODE | 172 RK3288_LVDS_CH0_REG4_LANE3_TTL_MODE | 173 RK3288_LVDS_CH0_REG4_LANE2_TTL_MODE | 174 RK3288_LVDS_CH0_REG4_LANE1_TTL_MODE | 175 RK3288_LVDS_CH0_REG4_LANE0_TTL_MODE); 176 rk3288_writel(lvds, RK3288_LVDS_CH0_REG5, 177 RK3288_LVDS_CH0_REG5_LANECK_TTL_DATA | 178 RK3288_LVDS_CH0_REG5_LANE4_TTL_DATA | 179 RK3288_LVDS_CH0_REG5_LANE3_TTL_DATA | 180 RK3288_LVDS_CH0_REG5_LANE2_TTL_DATA | 181 RK3288_LVDS_CH0_REG5_LANE1_TTL_DATA | 182 RK3288_LVDS_CH0_REG5_LANE0_TTL_DATA); 183 } else { 184 val |= RK3288_LVDS_CH0_REG0_LVDS_EN | 185 RK3288_LVDS_CH0_REG0_LANECK_EN; 186 rk3288_writel(lvds, RK3288_LVDS_CH0_REG0, val); 187 rk3288_writel(lvds, RK3288_LVDS_CH0_REG1, 188 RK3288_LVDS_CH0_REG1_LANECK_BIAS | 189 RK3288_LVDS_CH0_REG1_LANE4_BIAS | 190 RK3288_LVDS_CH0_REG1_LANE3_BIAS | 191 RK3288_LVDS_CH0_REG1_LANE2_BIAS | 192 RK3288_LVDS_CH0_REG1_LANE1_BIAS | 193 RK3288_LVDS_CH0_REG1_LANE0_BIAS); 194 rk3288_writel(lvds, RK3288_LVDS_CH0_REG2, 195 RK3288_LVDS_CH0_REG2_RESERVE_ON | 196 RK3288_LVDS_CH0_REG2_LANECK_LVDS_MODE | 197 RK3288_LVDS_CH0_REG2_LANE4_LVDS_MODE | 198 RK3288_LVDS_CH0_REG2_LANE3_LVDS_MODE | 199 RK3288_LVDS_CH0_REG2_LANE2_LVDS_MODE | 200 RK3288_LVDS_CH0_REG2_LANE1_LVDS_MODE | 201 RK3288_LVDS_CH0_REG2_LANE0_LVDS_MODE | 202 RK3288_LVDS_PLL_FBDIV_REG2(0x46)); 203 rk3288_writel(lvds, RK3288_LVDS_CH0_REG4, 0x00); 204 rk3288_writel(lvds, RK3288_LVDS_CH0_REG5, 0x00); 205 } 206 rk3288_writel(lvds, RK3288_LVDS_CH0_REG3, 207 RK3288_LVDS_PLL_FBDIV_REG3(0x46)); 208 rk3288_writel(lvds, RK3288_LVDS_CH0_REGD, 209 RK3288_LVDS_PLL_PREDIV_REGD(0x0a)); 210 rk3288_writel(lvds, RK3288_LVDS_CH0_REG20, 211 RK3288_LVDS_CH0_REG20_LSB); 212 213 rk3288_writel(lvds, RK3288_LVDS_CFG_REGC, 214 RK3288_LVDS_CFG_REGC_PLL_ENABLE); 215 rk3288_writel(lvds, RK3288_LVDS_CFG_REG21, 216 RK3288_LVDS_CFG_REG21_TX_ENABLE); 217 218 return 0; 219 } 220 221 static void rk3288_lvds_poweroff(struct rockchip_lvds *lvds) 222 { 223 int ret; 224 u32 val; 225 226 rk3288_writel(lvds, RK3288_LVDS_CFG_REG21, 227 RK3288_LVDS_CFG_REG21_TX_ENABLE); 228 rk3288_writel(lvds, RK3288_LVDS_CFG_REGC, 229 RK3288_LVDS_CFG_REGC_PLL_ENABLE); 230 val = LVDS_DUAL | LVDS_TTL_EN | LVDS_CH0_EN | LVDS_CH1_EN | LVDS_PWRDN; 231 val |= val << 16; 232 ret = regmap_write(lvds->grf, RK3288_LVDS_GRF_SOC_CON7, val); 233 if (ret != 0) 234 DRM_DEV_ERROR(lvds->dev, "Could not write to GRF: %d\n", ret); 235 236 pm_runtime_put(lvds->dev); 237 clk_disable(lvds->pclk); 238 } 239 240 static int rk3288_lvds_grf_config(struct drm_encoder *encoder, 241 struct drm_display_mode *mode) 242 { 243 struct rockchip_lvds *lvds = encoder_to_lvds(encoder); 244 u8 pin_hsync = (mode->flags & DRM_MODE_FLAG_PHSYNC) ? 1 : 0; 245 u8 pin_dclk = (mode->flags & DRM_MODE_FLAG_PCSYNC) ? 1 : 0; 246 u32 val; 247 int ret; 248 249 /* iomux to LCD data/sync mode */ 250 if (lvds->output == DISPLAY_OUTPUT_RGB) 251 if (lvds->pins && !IS_ERR(lvds->pins->default_state)) 252 pinctrl_select_state(lvds->pins->p, 253 lvds->pins->default_state); 254 val = lvds->format | LVDS_CH0_EN; 255 if (lvds->output == DISPLAY_OUTPUT_RGB) 256 val |= LVDS_TTL_EN | LVDS_CH1_EN; 257 else if (lvds->output == DISPLAY_OUTPUT_DUAL_LVDS) 258 val |= LVDS_DUAL | LVDS_CH1_EN; 259 260 if ((mode->htotal - mode->hsync_start) & 0x01) 261 val |= LVDS_START_PHASE_RST_1; 262 263 val |= (pin_dclk << 8) | (pin_hsync << 9); 264 val |= (0xffff << 16); 265 ret = regmap_write(lvds->grf, RK3288_LVDS_GRF_SOC_CON7, val); 266 if (ret) 267 DRM_DEV_ERROR(lvds->dev, "Could not write to GRF: %d\n", ret); 268 269 return ret; 270 } 271 272 static int rk3288_lvds_set_vop_source(struct rockchip_lvds *lvds, 273 struct drm_encoder *encoder) 274 { 275 u32 val; 276 int ret; 277 278 ret = drm_of_encoder_active_endpoint_id(lvds->dev->of_node, encoder); 279 if (ret < 0) 280 return ret; 281 282 val = RK3288_LVDS_SOC_CON6_SEL_VOP_LIT << 16; 283 if (ret) 284 val |= RK3288_LVDS_SOC_CON6_SEL_VOP_LIT; 285 286 ret = regmap_write(lvds->grf, RK3288_LVDS_GRF_SOC_CON6, val); 287 if (ret < 0) 288 return ret; 289 290 return 0; 291 } 292 293 static void rk3288_lvds_encoder_enable(struct drm_encoder *encoder) 294 { 295 struct rockchip_lvds *lvds = encoder_to_lvds(encoder); 296 struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode; 297 int ret; 298 299 drm_panel_prepare(lvds->panel); 300 301 ret = rk3288_lvds_poweron(lvds); 302 if (ret < 0) { 303 DRM_DEV_ERROR(lvds->dev, "failed to power on LVDS: %d\n", ret); 304 drm_panel_unprepare(lvds->panel); 305 return; 306 } 307 308 ret = rk3288_lvds_grf_config(encoder, mode); 309 if (ret) { 310 DRM_DEV_ERROR(lvds->dev, "failed to configure LVDS: %d\n", ret); 311 drm_panel_unprepare(lvds->panel); 312 return; 313 } 314 315 ret = rk3288_lvds_set_vop_source(lvds, encoder); 316 if (ret) { 317 DRM_DEV_ERROR(lvds->dev, "failed to set VOP source: %d\n", ret); 318 drm_panel_unprepare(lvds->panel); 319 return; 320 } 321 322 drm_panel_enable(lvds->panel); 323 } 324 325 static void rk3288_lvds_encoder_disable(struct drm_encoder *encoder) 326 { 327 struct rockchip_lvds *lvds = encoder_to_lvds(encoder); 328 329 drm_panel_disable(lvds->panel); 330 rk3288_lvds_poweroff(lvds); 331 drm_panel_unprepare(lvds->panel); 332 } 333 334 static int px30_lvds_poweron(struct rockchip_lvds *lvds) 335 { 336 int ret; 337 338 ret = pm_runtime_resume_and_get(lvds->dev); 339 if (ret < 0) { 340 DRM_DEV_ERROR(lvds->dev, "failed to get pm runtime: %d\n", ret); 341 return ret; 342 } 343 344 /* Enable LVDS mode */ 345 ret = regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1, 346 PX30_LVDS_MODE_EN(1) | PX30_LVDS_P2S_EN(1), 347 PX30_LVDS_MODE_EN(1) | PX30_LVDS_P2S_EN(1)); 348 if (ret) 349 pm_runtime_put(lvds->dev); 350 351 return ret; 352 } 353 354 static void px30_lvds_poweroff(struct rockchip_lvds *lvds) 355 { 356 regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1, 357 PX30_LVDS_MODE_EN(1) | PX30_LVDS_P2S_EN(1), 358 PX30_LVDS_MODE_EN(0) | PX30_LVDS_P2S_EN(0)); 359 360 pm_runtime_put(lvds->dev); 361 } 362 363 static int px30_lvds_grf_config(struct drm_encoder *encoder, 364 struct drm_display_mode *mode) 365 { 366 struct rockchip_lvds *lvds = encoder_to_lvds(encoder); 367 368 if (lvds->output != DISPLAY_OUTPUT_LVDS) { 369 DRM_DEV_ERROR(lvds->dev, "Unsupported display output %d\n", 370 lvds->output); 371 return -EINVAL; 372 } 373 374 /* Set format */ 375 return regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1, 376 PX30_LVDS_FORMAT(lvds->format), 377 PX30_LVDS_FORMAT(lvds->format)); 378 } 379 380 static int px30_lvds_set_vop_source(struct rockchip_lvds *lvds, 381 struct drm_encoder *encoder) 382 { 383 int vop; 384 385 vop = drm_of_encoder_active_endpoint_id(lvds->dev->of_node, encoder); 386 if (vop < 0) 387 return vop; 388 389 return regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1, 390 PX30_LVDS_VOP_SEL(1), 391 PX30_LVDS_VOP_SEL(vop)); 392 } 393 394 static void px30_lvds_encoder_enable(struct drm_encoder *encoder) 395 { 396 struct rockchip_lvds *lvds = encoder_to_lvds(encoder); 397 struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode; 398 int ret; 399 400 drm_panel_prepare(lvds->panel); 401 402 ret = px30_lvds_poweron(lvds); 403 if (ret) { 404 DRM_DEV_ERROR(lvds->dev, "failed to power on LVDS: %d\n", ret); 405 drm_panel_unprepare(lvds->panel); 406 return; 407 } 408 409 ret = px30_lvds_grf_config(encoder, mode); 410 if (ret) { 411 DRM_DEV_ERROR(lvds->dev, "failed to configure LVDS: %d\n", ret); 412 drm_panel_unprepare(lvds->panel); 413 return; 414 } 415 416 ret = px30_lvds_set_vop_source(lvds, encoder); 417 if (ret) { 418 DRM_DEV_ERROR(lvds->dev, "failed to set VOP source: %d\n", ret); 419 drm_panel_unprepare(lvds->panel); 420 return; 421 } 422 423 drm_panel_enable(lvds->panel); 424 } 425 426 static void px30_lvds_encoder_disable(struct drm_encoder *encoder) 427 { 428 struct rockchip_lvds *lvds = encoder_to_lvds(encoder); 429 430 drm_panel_disable(lvds->panel); 431 px30_lvds_poweroff(lvds); 432 drm_panel_unprepare(lvds->panel); 433 } 434 435 static const 436 struct drm_encoder_helper_funcs rk3288_lvds_encoder_helper_funcs = { 437 .enable = rk3288_lvds_encoder_enable, 438 .disable = rk3288_lvds_encoder_disable, 439 .atomic_check = rockchip_lvds_encoder_atomic_check, 440 }; 441 442 static const 443 struct drm_encoder_helper_funcs px30_lvds_encoder_helper_funcs = { 444 .enable = px30_lvds_encoder_enable, 445 .disable = px30_lvds_encoder_disable, 446 .atomic_check = rockchip_lvds_encoder_atomic_check, 447 }; 448 449 static int rk3288_lvds_probe(struct platform_device *pdev, 450 struct rockchip_lvds *lvds) 451 { 452 int ret; 453 454 lvds->regs = devm_platform_ioremap_resource(pdev, 0); 455 if (IS_ERR(lvds->regs)) 456 return PTR_ERR(lvds->regs); 457 458 lvds->pclk = devm_clk_get(lvds->dev, "pclk_lvds"); 459 if (IS_ERR(lvds->pclk)) { 460 DRM_DEV_ERROR(lvds->dev, "could not get pclk_lvds\n"); 461 return PTR_ERR(lvds->pclk); 462 } 463 464 lvds->pins = devm_kzalloc(lvds->dev, sizeof(*lvds->pins), 465 GFP_KERNEL); 466 if (!lvds->pins) 467 return -ENOMEM; 468 469 lvds->pins->p = devm_pinctrl_get(lvds->dev); 470 if (IS_ERR(lvds->pins->p)) { 471 DRM_DEV_ERROR(lvds->dev, "no pinctrl handle\n"); 472 devm_kfree(lvds->dev, lvds->pins); 473 lvds->pins = NULL; 474 } else { 475 lvds->pins->default_state = 476 pinctrl_lookup_state(lvds->pins->p, "lcdc"); 477 if (IS_ERR(lvds->pins->default_state)) { 478 DRM_DEV_ERROR(lvds->dev, "no default pinctrl state\n"); 479 devm_kfree(lvds->dev, lvds->pins); 480 lvds->pins = NULL; 481 } 482 } 483 484 ret = clk_prepare(lvds->pclk); 485 if (ret < 0) { 486 DRM_DEV_ERROR(lvds->dev, "failed to prepare pclk_lvds\n"); 487 return ret; 488 } 489 490 return 0; 491 } 492 493 static int px30_lvds_probe(struct platform_device *pdev, 494 struct rockchip_lvds *lvds) 495 { 496 int ret; 497 498 /* MSB */ 499 ret = regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1, 500 PX30_LVDS_MSBSEL(1), 501 PX30_LVDS_MSBSEL(1)); 502 if (ret) 503 return ret; 504 505 /* PHY */ 506 lvds->dphy = devm_phy_get(&pdev->dev, "dphy"); 507 if (IS_ERR(lvds->dphy)) 508 return PTR_ERR(lvds->dphy); 509 510 ret = phy_init(lvds->dphy); 511 if (ret) 512 return ret; 513 514 ret = phy_set_mode(lvds->dphy, PHY_MODE_LVDS); 515 if (ret) 516 return ret; 517 518 return phy_power_on(lvds->dphy); 519 } 520 521 static const struct rockchip_lvds_soc_data rk3288_lvds_data = { 522 .probe = rk3288_lvds_probe, 523 .helper_funcs = &rk3288_lvds_encoder_helper_funcs, 524 }; 525 526 static const struct rockchip_lvds_soc_data px30_lvds_data = { 527 .probe = px30_lvds_probe, 528 .helper_funcs = &px30_lvds_encoder_helper_funcs, 529 }; 530 531 static const struct of_device_id rockchip_lvds_dt_ids[] = { 532 { 533 .compatible = "rockchip,rk3288-lvds", 534 .data = &rk3288_lvds_data 535 }, 536 { 537 .compatible = "rockchip,px30-lvds", 538 .data = &px30_lvds_data 539 }, 540 {} 541 }; 542 MODULE_DEVICE_TABLE(of, rockchip_lvds_dt_ids); 543 544 static int rockchip_lvds_bind(struct device *dev, struct device *master, 545 void *data) 546 { 547 struct rockchip_lvds *lvds = dev_get_drvdata(dev); 548 struct drm_device *drm_dev = data; 549 struct drm_encoder *encoder; 550 struct drm_connector *connector; 551 struct device_node *remote = NULL; 552 struct device_node *port, *endpoint; 553 int ret = 0, child_count = 0; 554 const char *name; 555 u32 endpoint_id = 0; 556 557 lvds->drm_dev = drm_dev; 558 port = of_graph_get_port_by_id(dev->of_node, 1); 559 if (!port) { 560 DRM_DEV_ERROR(dev, 561 "can't found port point, please init lvds panel port!\n"); 562 return -EINVAL; 563 } 564 for_each_child_of_node(port, endpoint) { 565 child_count++; 566 of_property_read_u32(endpoint, "reg", &endpoint_id); 567 ret = drm_of_find_panel_or_bridge(dev->of_node, 1, endpoint_id, 568 &lvds->panel, &lvds->bridge); 569 if (!ret) { 570 of_node_put(endpoint); 571 break; 572 } 573 } 574 if (!child_count) { 575 DRM_DEV_ERROR(dev, "lvds port does not have any children\n"); 576 ret = -EINVAL; 577 goto err_put_port; 578 } else if (ret) { 579 DRM_DEV_ERROR(dev, "failed to find panel and bridge node\n"); 580 ret = -EPROBE_DEFER; 581 goto err_put_port; 582 } 583 if (lvds->panel) 584 remote = lvds->panel->dev->of_node; 585 else 586 remote = lvds->bridge->of_node; 587 if (of_property_read_string(dev->of_node, "rockchip,output", &name)) 588 /* default set it as output rgb */ 589 lvds->output = DISPLAY_OUTPUT_RGB; 590 else 591 lvds->output = rockchip_lvds_name_to_output(name); 592 593 if (lvds->output < 0) { 594 DRM_DEV_ERROR(dev, "invalid output type [%s]\n", name); 595 ret = lvds->output; 596 goto err_put_remote; 597 } 598 599 if (of_property_read_string(remote, "data-mapping", &name)) 600 /* default set it as format vesa 18 */ 601 lvds->format = LVDS_VESA_18; 602 else 603 lvds->format = rockchip_lvds_name_to_format(name); 604 605 if (lvds->format < 0) { 606 DRM_DEV_ERROR(dev, "invalid data-mapping format [%s]\n", name); 607 ret = lvds->format; 608 goto err_put_remote; 609 } 610 611 encoder = &lvds->encoder.encoder; 612 encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev, 613 dev->of_node); 614 615 ret = drm_simple_encoder_init(drm_dev, encoder, DRM_MODE_ENCODER_LVDS); 616 if (ret < 0) { 617 DRM_DEV_ERROR(drm_dev->dev, 618 "failed to initialize encoder: %d\n", ret); 619 goto err_put_remote; 620 } 621 622 drm_encoder_helper_add(encoder, lvds->soc_data->helper_funcs); 623 connector = &lvds->connector; 624 625 if (lvds->panel) { 626 connector->dpms = DRM_MODE_DPMS_OFF; 627 ret = drm_connector_init(drm_dev, connector, 628 &rockchip_lvds_connector_funcs, 629 DRM_MODE_CONNECTOR_LVDS); 630 if (ret < 0) { 631 DRM_DEV_ERROR(drm_dev->dev, 632 "failed to initialize connector: %d\n", ret); 633 goto err_free_encoder; 634 } 635 636 drm_connector_helper_add(connector, 637 &rockchip_lvds_connector_helper_funcs); 638 } else { 639 ret = drm_bridge_attach(encoder, lvds->bridge, NULL, 640 DRM_BRIDGE_ATTACH_NO_CONNECTOR); 641 if (ret) 642 goto err_free_encoder; 643 644 connector = drm_bridge_connector_init(lvds->drm_dev, encoder); 645 if (IS_ERR(connector)) { 646 DRM_DEV_ERROR(drm_dev->dev, 647 "failed to initialize bridge connector: %pe\n", 648 connector); 649 ret = PTR_ERR(connector); 650 goto err_free_encoder; 651 } 652 } 653 654 ret = drm_connector_attach_encoder(connector, encoder); 655 if (ret < 0) { 656 DRM_DEV_ERROR(drm_dev->dev, 657 "failed to attach encoder: %d\n", ret); 658 goto err_free_connector; 659 } 660 661 pm_runtime_enable(dev); 662 of_node_put(remote); 663 of_node_put(port); 664 665 return 0; 666 667 err_free_connector: 668 drm_connector_cleanup(connector); 669 err_free_encoder: 670 drm_encoder_cleanup(encoder); 671 err_put_remote: 672 of_node_put(remote); 673 err_put_port: 674 of_node_put(port); 675 676 return ret; 677 } 678 679 static void rockchip_lvds_unbind(struct device *dev, struct device *master, 680 void *data) 681 { 682 struct rockchip_lvds *lvds = dev_get_drvdata(dev); 683 const struct drm_encoder_helper_funcs *encoder_funcs; 684 685 encoder_funcs = lvds->soc_data->helper_funcs; 686 encoder_funcs->disable(&lvds->encoder.encoder); 687 pm_runtime_disable(dev); 688 drm_connector_cleanup(&lvds->connector); 689 drm_encoder_cleanup(&lvds->encoder.encoder); 690 } 691 692 static const struct component_ops rockchip_lvds_component_ops = { 693 .bind = rockchip_lvds_bind, 694 .unbind = rockchip_lvds_unbind, 695 }; 696 697 static int rockchip_lvds_probe(struct platform_device *pdev) 698 { 699 struct device *dev = &pdev->dev; 700 struct rockchip_lvds *lvds; 701 const struct of_device_id *match; 702 int ret; 703 704 if (!dev->of_node) 705 return -ENODEV; 706 707 lvds = devm_kzalloc(&pdev->dev, sizeof(*lvds), GFP_KERNEL); 708 if (!lvds) 709 return -ENOMEM; 710 711 lvds->dev = dev; 712 match = of_match_node(rockchip_lvds_dt_ids, dev->of_node); 713 if (!match) 714 return -ENODEV; 715 lvds->soc_data = match->data; 716 717 lvds->grf = syscon_regmap_lookup_by_phandle(dev->of_node, 718 "rockchip,grf"); 719 if (IS_ERR(lvds->grf)) { 720 DRM_DEV_ERROR(dev, "missing rockchip,grf property\n"); 721 return PTR_ERR(lvds->grf); 722 } 723 724 ret = lvds->soc_data->probe(pdev, lvds); 725 if (ret) { 726 DRM_DEV_ERROR(dev, "Platform initialization failed\n"); 727 return ret; 728 } 729 730 dev_set_drvdata(dev, lvds); 731 732 ret = component_add(&pdev->dev, &rockchip_lvds_component_ops); 733 if (ret < 0) { 734 DRM_DEV_ERROR(dev, "failed to add component\n"); 735 clk_unprepare(lvds->pclk); 736 } 737 738 return ret; 739 } 740 741 static void rockchip_lvds_remove(struct platform_device *pdev) 742 { 743 struct rockchip_lvds *lvds = platform_get_drvdata(pdev); 744 745 component_del(&pdev->dev, &rockchip_lvds_component_ops); 746 clk_unprepare(lvds->pclk); 747 } 748 749 struct platform_driver rockchip_lvds_driver = { 750 .probe = rockchip_lvds_probe, 751 .remove_new = rockchip_lvds_remove, 752 .driver = { 753 .name = "rockchip-lvds", 754 .of_match_table = rockchip_lvds_dt_ids, 755 }, 756 }; 757