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rockchip_lvds.c
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linux-6.19.14/drivers/gpu/drm/rockchip/rockchip_lvds.c
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#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 36struct 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 */ 43struct 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 48struct 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 rockchip_encoder encoder; 61 struct dev_pin_info *pins; 62}; 63 64static inline struct rockchip_lvds *brige_to_lvds(struct drm_bridge *bridge) 65{ 66 return (struct rockchip_lvds *)bridge->driver_private; 67} 68 69static inline struct rockchip_lvds *encoder_to_lvds(struct drm_encoder *encoder) 70{ 71 struct rockchip_encoder *rkencoder = to_rockchip_encoder(encoder); 72 73 return container_of(rkencoder, struct rockchip_lvds, encoder); 74} 75 76static inline void rk3288_writel(struct rockchip_lvds *lvds, u32 offset, 77 u32 val) 78{ 79 writel_relaxed(val, lvds->regs + offset); 80 if (lvds->output == DISPLAY_OUTPUT_LVDS) 81 return; 82 writel_relaxed(val, lvds->regs + offset + RK3288_LVDS_CH1_OFFSET); 83} 84 85static inline int rockchip_lvds_name_to_format(const char *s) 86{ 87 if (strncmp(s, "jeida-18", 8) == 0) 88 return LVDS_JEIDA_18; 89 else if (strncmp(s, "jeida-24", 8) == 0) 90 return LVDS_JEIDA_24; 91 else if (strncmp(s, "vesa-24", 7) == 0) 92 return LVDS_VESA_24; 93 94 return -EINVAL; 95} 96 97static inline int rockchip_lvds_name_to_output(const char *s) 98{ 99 if (strncmp(s, "rgb", 3) == 0) 100 return DISPLAY_OUTPUT_RGB; 101 else if (strncmp(s, "lvds", 4) == 0) 102 return DISPLAY_OUTPUT_LVDS; 103 else if (strncmp(s, "duallvds", 8) == 0) 104 return DISPLAY_OUTPUT_DUAL_LVDS; 105 106 return -EINVAL; 107} 108 109static int 110rockchip_lvds_bridge_get_modes(struct drm_bridge *bridge, struct drm_connector *connector) 111{ 112 struct rockchip_lvds *lvds = brige_to_lvds(bridge); 113 struct drm_panel *panel = lvds->panel; 114 115 return drm_panel_get_modes(panel, connector); 116} 117 118static const 119struct drm_bridge_funcs rockchip_lvds_bridge_funcs = { 120 .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, 121 .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, 122 .atomic_reset = drm_atomic_helper_bridge_reset, 123 .get_modes = rockchip_lvds_bridge_get_modes, 124}; 125 126static int 127rockchip_lvds_encoder_atomic_check(struct drm_encoder *encoder, 128 struct drm_crtc_state *crtc_state, 129 struct drm_connector_state *conn_state) 130{ 131 struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state); 132 133 s->output_mode = ROCKCHIP_OUT_MODE_P888; 134 s->output_type = DRM_MODE_CONNECTOR_LVDS; 135 136 return 0; 137} 138 139static int rk3288_lvds_poweron(struct rockchip_lvds *lvds) 140{ 141 int ret; 142 u32 val; 143 144 ret = clk_enable(lvds->pclk); 145 if (ret < 0) { 146 DRM_DEV_ERROR(lvds->dev, "failed to enable lvds pclk %d\n", ret); 147 return ret; 148 } 149 ret = pm_runtime_resume_and_get(lvds->dev); 150 if (ret < 0) { 151 DRM_DEV_ERROR(lvds->dev, "failed to get pm runtime: %d\n", ret); 152 clk_disable(lvds->pclk); 153 return ret; 154 } 155 val = RK3288_LVDS_CH0_REG0_LANE4_EN | RK3288_LVDS_CH0_REG0_LANE3_EN | 156 RK3288_LVDS_CH0_REG0_LANE2_EN | RK3288_LVDS_CH0_REG0_LANE1_EN | 157 RK3288_LVDS_CH0_REG0_LANE0_EN; 158 if (lvds->output == DISPLAY_OUTPUT_RGB) { 159 val |= RK3288_LVDS_CH0_REG0_TTL_EN | 160 RK3288_LVDS_CH0_REG0_LANECK_EN; 161 rk3288_writel(lvds, RK3288_LVDS_CH0_REG0, val); 162 rk3288_writel(lvds, RK3288_LVDS_CH0_REG2, 163 RK3288_LVDS_PLL_FBDIV_REG2(0x46)); 164 rk3288_writel(lvds, RK3288_LVDS_CH0_REG4, 165 RK3288_LVDS_CH0_REG4_LANECK_TTL_MODE | 166 RK3288_LVDS_CH0_REG4_LANE4_TTL_MODE | 167 RK3288_LVDS_CH0_REG4_LANE3_TTL_MODE | 168 RK3288_LVDS_CH0_REG4_LANE2_TTL_MODE | 169 RK3288_LVDS_CH0_REG4_LANE1_TTL_MODE | 170 RK3288_LVDS_CH0_REG4_LANE0_TTL_MODE); 171 rk3288_writel(lvds, RK3288_LVDS_CH0_REG5, 172 RK3288_LVDS_CH0_REG5_LANECK_TTL_DATA | 173 RK3288_LVDS_CH0_REG5_LANE4_TTL_DATA | 174 RK3288_LVDS_CH0_REG5_LANE3_TTL_DATA | 175 RK3288_LVDS_CH0_REG5_LANE2_TTL_DATA | 176 RK3288_LVDS_CH0_REG5_LANE1_TTL_DATA | 177 RK3288_LVDS_CH0_REG5_LANE0_TTL_DATA); 178 } else { 179 val |= RK3288_LVDS_CH0_REG0_LVDS_EN | 180 RK3288_LVDS_CH0_REG0_LANECK_EN; 181 rk3288_writel(lvds, RK3288_LVDS_CH0_REG0, val); 182 rk3288_writel(lvds, RK3288_LVDS_CH0_REG1, 183 RK3288_LVDS_CH0_REG1_LANECK_BIAS | 184 RK3288_LVDS_CH0_REG1_LANE4_BIAS | 185 RK3288_LVDS_CH0_REG1_LANE3_BIAS | 186 RK3288_LVDS_CH0_REG1_LANE2_BIAS | 187 RK3288_LVDS_CH0_REG1_LANE1_BIAS | 188 RK3288_LVDS_CH0_REG1_LANE0_BIAS); 189 rk3288_writel(lvds, RK3288_LVDS_CH0_REG2, 190 RK3288_LVDS_CH0_REG2_RESERVE_ON | 191 RK3288_LVDS_CH0_REG2_LANECK_LVDS_MODE | 192 RK3288_LVDS_CH0_REG2_LANE4_LVDS_MODE | 193 RK3288_LVDS_CH0_REG2_LANE3_LVDS_MODE | 194 RK3288_LVDS_CH0_REG2_LANE2_LVDS_MODE | 195 RK3288_LVDS_CH0_REG2_LANE1_LVDS_MODE | 196 RK3288_LVDS_CH0_REG2_LANE0_LVDS_MODE | 197 RK3288_LVDS_PLL_FBDIV_REG2(0x46)); 198 rk3288_writel(lvds, RK3288_LVDS_CH0_REG4, 0x00); 199 rk3288_writel(lvds, RK3288_LVDS_CH0_REG5, 0x00); 200 } 201 rk3288_writel(lvds, RK3288_LVDS_CH0_REG3, 202 RK3288_LVDS_PLL_FBDIV_REG3(0x46)); 203 rk3288_writel(lvds, RK3288_LVDS_CH0_REGD, 204 RK3288_LVDS_PLL_PREDIV_REGD(0x0a)); 205 rk3288_writel(lvds, RK3288_LVDS_CH0_REG20, 206 RK3288_LVDS_CH0_REG20_LSB); 207 208 rk3288_writel(lvds, RK3288_LVDS_CFG_REGC, 209 RK3288_LVDS_CFG_REGC_PLL_ENABLE); 210 rk3288_writel(lvds, RK3288_LVDS_CFG_REG21, 211 RK3288_LVDS_CFG_REG21_TX_ENABLE); 212 213 return 0; 214} 215 216static void rk3288_lvds_poweroff(struct rockchip_lvds *lvds) 217{ 218 int ret; 219 u32 val; 220 221 rk3288_writel(lvds, RK3288_LVDS_CFG_REG21, 222 RK3288_LVDS_CFG_REG21_TX_ENABLE); 223 rk3288_writel(lvds, RK3288_LVDS_CFG_REGC, 224 RK3288_LVDS_CFG_REGC_PLL_ENABLE); 225 val = LVDS_DUAL | LVDS_TTL_EN | LVDS_CH0_EN | LVDS_CH1_EN | LVDS_PWRDN; 226 val |= val << 16; 227 ret = regmap_write(lvds->grf, RK3288_LVDS_GRF_SOC_CON7, val); 228 if (ret != 0) 229 DRM_DEV_ERROR(lvds->dev, "Could not write to GRF: %d\n", ret); 230 231 pm_runtime_put(lvds->dev); 232 clk_disable(lvds->pclk); 233} 234 235static int rk3288_lvds_grf_config(struct drm_encoder *encoder, 236 struct drm_display_mode *mode) 237{ 238 struct rockchip_lvds *lvds = encoder_to_lvds(encoder); 239 u8 pin_hsync = (mode->flags & DRM_MODE_FLAG_PHSYNC) ? 1 : 0; 240 u8 pin_dclk = (mode->flags & DRM_MODE_FLAG_PCSYNC) ? 1 : 0; 241 u32 val; 242 int ret; 243 244 /* iomux to LCD data/sync mode */ 245 if (lvds->output == DISPLAY_OUTPUT_RGB) 246 if (lvds->pins && !IS_ERR(lvds->pins->default_state)) 247 pinctrl_select_state(lvds->pins->p, 248 lvds->pins->default_state); 249 val = lvds->format | LVDS_CH0_EN; 250 if (lvds->output == DISPLAY_OUTPUT_RGB) 251 val |= LVDS_TTL_EN | LVDS_CH1_EN; 252 else if (lvds->output == DISPLAY_OUTPUT_DUAL_LVDS) 253 val |= LVDS_DUAL | LVDS_CH1_EN; 254 255 if ((mode->htotal - mode->hsync_start) & 0x01) 256 val |= LVDS_START_PHASE_RST_1; 257 258 val |= (pin_dclk << 8) | (pin_hsync << 9); 259 val |= (0xffff << 16); 260 ret = regmap_write(lvds->grf, RK3288_LVDS_GRF_SOC_CON7, val); 261 if (ret) 262 DRM_DEV_ERROR(lvds->dev, "Could not write to GRF: %d\n", ret); 263 264 return ret; 265} 266 267static int rk3288_lvds_set_vop_source(struct rockchip_lvds *lvds, 268 struct drm_encoder *encoder) 269{ 270 u32 val; 271 int ret; 272 273 ret = drm_of_encoder_active_endpoint_id(lvds->dev->of_node, encoder); 274 if (ret < 0) 275 return ret; 276 277 val = RK3288_LVDS_SOC_CON6_SEL_VOP_LIT << 16; 278 if (ret) 279 val |= RK3288_LVDS_SOC_CON6_SEL_VOP_LIT; 280 281 ret = regmap_write(lvds->grf, RK3288_LVDS_GRF_SOC_CON6, val); 282 if (ret < 0) 283 return ret; 284 285 return 0; 286} 287 288static void rk3288_lvds_encoder_enable(struct drm_encoder *encoder) 289{ 290 struct rockchip_lvds *lvds = encoder_to_lvds(encoder); 291 struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode; 292 int ret; 293 294 drm_panel_prepare(lvds->panel); 295 296 ret = rk3288_lvds_poweron(lvds); 297 if (ret < 0) { 298 DRM_DEV_ERROR(lvds->dev, "failed to power on LVDS: %d\n", ret); 299 drm_panel_unprepare(lvds->panel); 300 return; 301 } 302 303 ret = rk3288_lvds_grf_config(encoder, mode); 304 if (ret) { 305 DRM_DEV_ERROR(lvds->dev, "failed to configure LVDS: %d\n", ret); 306 drm_panel_unprepare(lvds->panel); 307 return; 308 } 309 310 ret = rk3288_lvds_set_vop_source(lvds, encoder); 311 if (ret) { 312 DRM_DEV_ERROR(lvds->dev, "failed to set VOP source: %d\n", ret); 313 drm_panel_unprepare(lvds->panel); 314 return; 315 } 316 317 drm_panel_enable(lvds->panel); 318} 319 320static void rk3288_lvds_encoder_disable(struct drm_encoder *encoder) 321{ 322 struct rockchip_lvds *lvds = encoder_to_lvds(encoder); 323 324 drm_panel_disable(lvds->panel); 325 rk3288_lvds_poweroff(lvds); 326 drm_panel_unprepare(lvds->panel); 327} 328 329static int px30_lvds_poweron(struct rockchip_lvds *lvds) 330{ 331 int ret; 332 333 ret = pm_runtime_resume_and_get(lvds->dev); 334 if (ret < 0) { 335 DRM_DEV_ERROR(lvds->dev, "failed to get pm runtime: %d\n", ret); 336 return ret; 337 } 338 339 /* Enable LVDS mode */ 340 ret = regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1, 341 PX30_LVDS_MODE_EN(1) | PX30_LVDS_P2S_EN(1), 342 PX30_LVDS_MODE_EN(1) | PX30_LVDS_P2S_EN(1)); 343 if (ret) 344 pm_runtime_put(lvds->dev); 345 346 return ret; 347} 348 349static void px30_lvds_poweroff(struct rockchip_lvds *lvds) 350{ 351 regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1, 352 PX30_LVDS_MODE_EN(1) | PX30_LVDS_P2S_EN(1), 353 PX30_LVDS_MODE_EN(0) | PX30_LVDS_P2S_EN(0)); 354 355 pm_runtime_put(lvds->dev); 356} 357 358static int px30_lvds_grf_config(struct drm_encoder *encoder, 359 struct drm_display_mode *mode) 360{ 361 struct rockchip_lvds *lvds = encoder_to_lvds(encoder); 362 363 if (lvds->output != DISPLAY_OUTPUT_LVDS) { 364 DRM_DEV_ERROR(lvds->dev, "Unsupported display output %d\n", 365 lvds->output); 366 return -EINVAL; 367 } 368 369 /* Set format */ 370 return regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1, 371 PX30_LVDS_FORMAT(lvds->format), 372 PX30_LVDS_FORMAT(lvds->format)); 373} 374 375static int px30_lvds_set_vop_source(struct rockchip_lvds *lvds, 376 struct drm_encoder *encoder) 377{ 378 int vop; 379 380 vop = drm_of_encoder_active_endpoint_id(lvds->dev->of_node, encoder); 381 if (vop < 0) 382 return vop; 383 384 return regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1, 385 PX30_LVDS_VOP_SEL(1), 386 PX30_LVDS_VOP_SEL(vop)); 387} 388 389static void px30_lvds_encoder_enable(struct drm_encoder *encoder) 390{ 391 struct rockchip_lvds *lvds = encoder_to_lvds(encoder); 392 struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode; 393 int ret; 394 395 drm_panel_prepare(lvds->panel); 396 397 ret = px30_lvds_poweron(lvds); 398 if (ret) { 399 DRM_DEV_ERROR(lvds->dev, "failed to power on LVDS: %d\n", ret); 400 drm_panel_unprepare(lvds->panel); 401 return; 402 } 403 404 ret = px30_lvds_grf_config(encoder, mode); 405 if (ret) { 406 DRM_DEV_ERROR(lvds->dev, "failed to configure LVDS: %d\n", ret); 407 drm_panel_unprepare(lvds->panel); 408 return; 409 } 410 411 ret = px30_lvds_set_vop_source(lvds, encoder); 412 if (ret) { 413 DRM_DEV_ERROR(lvds->dev, "failed to set VOP source: %d\n", ret); 414 drm_panel_unprepare(lvds->panel); 415 return; 416 } 417 418 drm_panel_enable(lvds->panel); 419} 420 421static void px30_lvds_encoder_disable(struct drm_encoder *encoder) 422{ 423 struct rockchip_lvds *lvds = encoder_to_lvds(encoder); 424 425 drm_panel_disable(lvds->panel); 426 px30_lvds_poweroff(lvds); 427 drm_panel_unprepare(lvds->panel); 428} 429 430static const 431struct drm_encoder_helper_funcs rk3288_lvds_encoder_helper_funcs = { 432 .enable = rk3288_lvds_encoder_enable, 433 .disable = rk3288_lvds_encoder_disable, 434 .atomic_check = rockchip_lvds_encoder_atomic_check, 435}; 436 437static const 438struct drm_encoder_helper_funcs px30_lvds_encoder_helper_funcs = { 439 .enable = px30_lvds_encoder_enable, 440 .disable = px30_lvds_encoder_disable, 441 .atomic_check = rockchip_lvds_encoder_atomic_check, 442}; 443 444static int rk3288_lvds_probe(struct platform_device *pdev, 445 struct rockchip_lvds *lvds) 446{ 447 lvds->regs = devm_platform_ioremap_resource(pdev, 0); 448 if (IS_ERR(lvds->regs)) 449 return PTR_ERR(lvds->regs); 450 451 lvds->pclk = devm_clk_get_prepared(lvds->dev, "pclk_lvds"); 452 if (IS_ERR(lvds->pclk)) 453 return dev_err_probe(lvds->dev, PTR_ERR(lvds->pclk), 454 "could not get or prepare pclk_lvds\n"); 455 456 lvds->pins = devm_kzalloc(lvds->dev, sizeof(*lvds->pins), 457 GFP_KERNEL); 458 if (!lvds->pins) 459 return -ENOMEM; 460 461 lvds->pins->p = devm_pinctrl_get(lvds->dev); 462 if (IS_ERR(lvds->pins->p)) { 463 dev_warn(lvds->dev, "no pinctrl handle\n"); 464 devm_kfree(lvds->dev, lvds->pins); 465 lvds->pins = NULL; 466 } else { 467 lvds->pins->default_state = 468 pinctrl_lookup_state(lvds->pins->p, "lcdc"); 469 if (IS_ERR(lvds->pins->default_state)) { 470 dev_warn(lvds->dev, "no default pinctrl state\n"); 471 devm_kfree(lvds->dev, lvds->pins); 472 lvds->pins = NULL; 473 } 474 } 475 476 return 0; 477} 478 479static int px30_lvds_probe(struct platform_device *pdev, 480 struct rockchip_lvds *lvds) 481{ 482 int ret; 483 484 /* MSB */ 485 ret = regmap_update_bits(lvds->grf, PX30_LVDS_GRF_PD_VO_CON1, 486 PX30_LVDS_MSBSEL(1), 487 PX30_LVDS_MSBSEL(1)); 488 if (ret) 489 return ret; 490 491 /* PHY */ 492 lvds->dphy = devm_phy_get(&pdev->dev, "dphy"); 493 if (IS_ERR(lvds->dphy)) 494 return PTR_ERR(lvds->dphy); 495 496 ret = phy_init(lvds->dphy); 497 if (ret) 498 return ret; 499 500 ret = phy_set_mode(lvds->dphy, PHY_MODE_LVDS); 501 if (ret) 502 return ret; 503 504 return phy_power_on(lvds->dphy); 505} 506 507static const struct rockchip_lvds_soc_data rk3288_lvds_data = { 508 .probe = rk3288_lvds_probe, 509 .helper_funcs = &rk3288_lvds_encoder_helper_funcs, 510}; 511 512static const struct rockchip_lvds_soc_data px30_lvds_data = { 513 .probe = px30_lvds_probe, 514 .helper_funcs = &px30_lvds_encoder_helper_funcs, 515}; 516 517static const struct of_device_id rockchip_lvds_dt_ids[] = { 518 { 519 .compatible = "rockchip,rk3288-lvds", 520 .data = &rk3288_lvds_data 521 }, 522 { 523 .compatible = "rockchip,px30-lvds", 524 .data = &px30_lvds_data 525 }, 526 {} 527}; 528MODULE_DEVICE_TABLE(of, rockchip_lvds_dt_ids); 529 530static int rockchip_lvds_bind(struct device *dev, struct device *master, 531 void *data) 532{ 533 struct rockchip_lvds *lvds = dev_get_drvdata(dev); 534 struct drm_device *drm_dev = data; 535 struct drm_encoder *encoder; 536 struct drm_connector *connector; 537 struct device_node *remote = NULL; 538 struct device_node *port, *endpoint; 539 int ret = 0, child_count = 0; 540 const char *name; 541 u32 endpoint_id = 0; 542 543 lvds->drm_dev = drm_dev; 544 port = of_graph_get_port_by_id(dev->of_node, 1); 545 if (!port) 546 return dev_err_probe(dev, -EINVAL, 547 "can't found port point, please init lvds panel port!\n"); 548 549 for_each_child_of_node(port, endpoint) { 550 child_count++; 551 of_property_read_u32(endpoint, "reg", &endpoint_id); 552 ret = drm_of_find_panel_or_bridge(dev->of_node, 1, endpoint_id, 553 &lvds->panel, &lvds->bridge); 554 if (!ret) { 555 of_node_put(endpoint); 556 break; 557 } 558 } 559 if (!child_count) { 560 ret = dev_err_probe(dev, -EINVAL, "lvds port does not have any children\n"); 561 goto err_put_port; 562 } else if (ret) { 563 dev_err_probe(dev, ret, "failed to find panel and bridge node\n"); 564 goto err_put_port; 565 } 566 if (lvds->panel) 567 remote = lvds->panel->dev->of_node; 568 else 569 remote = lvds->bridge->of_node; 570 if (of_property_read_string(dev->of_node, "rockchip,output", &name)) 571 /* default set it as output rgb */ 572 lvds->output = DISPLAY_OUTPUT_RGB; 573 else 574 lvds->output = rockchip_lvds_name_to_output(name); 575 576 if (lvds->output < 0) { 577 ret = dev_err_probe(dev, lvds->output, "invalid output type [%s]\n", name); 578 goto err_put_remote; 579 } 580 581 if (of_property_read_string(remote, "data-mapping", &name)) 582 /* default set it as format vesa 18 */ 583 lvds->format = LVDS_VESA_18; 584 else 585 lvds->format = rockchip_lvds_name_to_format(name); 586 587 if (lvds->format < 0) { 588 ret = dev_err_probe(dev, lvds->format, 589 "invalid data-mapping format [%s]\n", name); 590 goto err_put_remote; 591 } 592 593 encoder = &lvds->encoder.encoder; 594 encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev, 595 dev->of_node); 596 597 ret = drm_simple_encoder_init(drm_dev, encoder, DRM_MODE_ENCODER_LVDS); 598 if (ret < 0) { 599 drm_err(drm_dev, 600 "failed to initialize encoder: %d\n", ret); 601 goto err_put_remote; 602 } 603 604 drm_encoder_helper_add(encoder, lvds->soc_data->helper_funcs); 605 606 if (lvds->panel) { 607 lvds->bridge = drm_panel_bridge_add_typed(lvds->panel, DRM_MODE_CONNECTOR_LVDS); 608 if (IS_ERR(lvds->bridge)) { 609 ret = PTR_ERR(lvds->bridge); 610 goto err_free_encoder; 611 } 612 } 613 614 if (lvds->bridge) { 615 lvds->bridge->driver_private = lvds; 616 lvds->bridge->ops = DRM_BRIDGE_OP_MODES; 617 lvds->bridge->funcs = &rockchip_lvds_bridge_funcs; 618 619 ret = drm_bridge_attach(encoder, lvds->bridge, NULL, DRM_BRIDGE_ATTACH_NO_CONNECTOR); 620 if (ret) 621 goto err_free_bridge; 622 623 connector = drm_bridge_connector_init(lvds->drm_dev, encoder); 624 if (IS_ERR(connector)) { 625 drm_err(drm_dev, 626 "failed to initialize bridge connector: %pe\n", 627 connector); 628 ret = PTR_ERR(connector); 629 goto err_free_bridge; 630 } 631 632 ret = drm_connector_attach_encoder(connector, encoder); 633 if (ret < 0) { 634 drm_err(drm_dev, "failed to attach encoder: %d\n", ret); 635 goto err_free_bridge; 636 } 637 } 638 639 pm_runtime_enable(dev); 640 of_node_put(remote); 641 of_node_put(port); 642 643 return 0; 644 645err_free_bridge: 646 drm_panel_bridge_remove(lvds->bridge); 647err_free_encoder: 648 drm_encoder_cleanup(encoder); 649err_put_remote: 650 of_node_put(remote); 651err_put_port: 652 of_node_put(port); 653 654 return ret; 655} 656 657static void rockchip_lvds_unbind(struct device *dev, struct device *master, 658 void *data) 659{ 660 struct rockchip_lvds *lvds = dev_get_drvdata(dev); 661 const struct drm_encoder_helper_funcs *encoder_funcs; 662 663 encoder_funcs = lvds->soc_data->helper_funcs; 664 encoder_funcs->disable(&lvds->encoder.encoder); 665 pm_runtime_disable(dev); 666} 667 668static const struct component_ops rockchip_lvds_component_ops = { 669 .bind = rockchip_lvds_bind, 670 .unbind = rockchip_lvds_unbind, 671}; 672 673static int rockchip_lvds_probe(struct platform_device *pdev) 674{ 675 struct device *dev = &pdev->dev; 676 struct rockchip_lvds *lvds; 677 const struct of_device_id *match; 678 int ret; 679 680 if (!dev->of_node) 681 return -ENODEV; 682 683 lvds = devm_kzalloc(&pdev->dev, sizeof(*lvds), GFP_KERNEL); 684 if (!lvds) 685 return -ENOMEM; 686 687 lvds->dev = dev; 688 match = of_match_node(rockchip_lvds_dt_ids, dev->of_node); 689 if (!match) 690 return -ENODEV; 691 lvds->soc_data = match->data; 692 693 lvds->grf = syscon_regmap_lookup_by_phandle(dev->of_node, 694 "rockchip,grf"); 695 if (IS_ERR(lvds->grf)) 696 return dev_err_probe(dev, PTR_ERR(lvds->grf), "missing rockchip,grf property\n"); 697 698 ret = lvds->soc_data->probe(pdev, lvds); 699 if (ret) 700 return dev_err_probe(dev, ret, "Platform initialization failed\n"); 701 702 dev_set_drvdata(dev, lvds); 703 704 ret = component_add(&pdev->dev, &rockchip_lvds_component_ops); 705 if (ret < 0) 706 return dev_err_probe(dev, ret, "failed to add component\n"); 707 708 return 0; 709} 710 711static void rockchip_lvds_remove(struct platform_device *pdev) 712{ 713 component_del(&pdev->dev, &rockchip_lvds_component_ops); 714} 715 716struct platform_driver rockchip_lvds_driver = { 717 .probe = rockchip_lvds_probe, 718 .remove = rockchip_lvds_remove, 719 .driver = { 720 .name = "rockchip-lvds", 721 .of_match_table = rockchip_lvds_dt_ids, 722 }, 723};
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