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