1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright(c) 2016, Analogix Semiconductor. 4 * Copyright(c) 2017, Icenowy Zheng <icenowy@aosc.io> 5 * 6 * Based on anx7808 driver obtained from chromeos with copyright: 7 * Copyright(c) 2013, Google Inc. 8 */ 9 #include <linux/delay.h> 10 #include <linux/err.h> 11 #include <linux/gpio/consumer.h> 12 #include <linux/i2c.h> 13 #include <linux/interrupt.h> 14 #include <linux/kernel.h> 15 #include <linux/module.h> 16 #include <linux/of_platform.h> 17 #include <linux/regmap.h> 18 #include <linux/regulator/consumer.h> 19 #include <linux/types.h> 20 21 #include <drm/display/drm_dp_helper.h> 22 #include <drm/drm_atomic_helper.h> 23 #include <drm/drm_bridge.h> 24 #include <drm/drm_crtc.h> 25 #include <drm/drm_edid.h> 26 #include <drm/drm_of.h> 27 #include <drm/drm_panel.h> 28 #include <drm/drm_print.h> 29 #include <drm/drm_probe_helper.h> 30 31 #include "analogix-i2c-dptx.h" 32 #include "analogix-i2c-txcommon.h" 33 34 #define POLL_DELAY 50000 /* us */ 35 #define POLL_TIMEOUT 5000000 /* us */ 36 37 #define I2C_IDX_DPTX 0 38 #define I2C_IDX_TXCOM 1 39 40 static const u8 anx6345_i2c_addresses[] = { 41 [I2C_IDX_DPTX] = 0x70, 42 [I2C_IDX_TXCOM] = 0x72, 43 }; 44 #define I2C_NUM_ADDRESSES ARRAY_SIZE(anx6345_i2c_addresses) 45 46 struct anx6345 { 47 struct drm_dp_aux aux; 48 struct drm_bridge bridge; 49 struct i2c_client *client; 50 const struct drm_edid *drm_edid; 51 struct drm_connector connector; 52 struct drm_panel *panel; 53 struct regulator *dvdd12; 54 struct regulator *dvdd25; 55 struct gpio_desc *gpiod_reset; 56 struct mutex lock; /* protect EDID access */ 57 58 /* I2C Slave addresses of ANX6345 are mapped as DPTX and SYS */ 59 struct i2c_client *i2c_clients[I2C_NUM_ADDRESSES]; 60 struct regmap *map[I2C_NUM_ADDRESSES]; 61 62 u16 chipid; 63 u8 dpcd[DP_RECEIVER_CAP_SIZE]; 64 65 bool powered; 66 }; 67 68 static inline struct anx6345 *connector_to_anx6345(struct drm_connector *c) 69 { 70 return container_of(c, struct anx6345, connector); 71 } 72 73 static inline struct anx6345 *bridge_to_anx6345(struct drm_bridge *bridge) 74 { 75 return container_of(bridge, struct anx6345, bridge); 76 } 77 78 static int anx6345_set_bits(struct regmap *map, u8 reg, u8 mask) 79 { 80 return regmap_update_bits(map, reg, mask, mask); 81 } 82 83 static int anx6345_clear_bits(struct regmap *map, u8 reg, u8 mask) 84 { 85 return regmap_update_bits(map, reg, mask, 0); 86 } 87 88 static ssize_t anx6345_aux_transfer(struct drm_dp_aux *aux, 89 struct drm_dp_aux_msg *msg) 90 { 91 struct anx6345 *anx6345 = container_of(aux, struct anx6345, aux); 92 93 return anx_dp_aux_transfer(anx6345->map[I2C_IDX_DPTX], msg); 94 } 95 96 static int anx6345_dp_link_training(struct anx6345 *anx6345) 97 { 98 unsigned int value; 99 u8 dp_bw, dpcd[2]; 100 int err; 101 102 err = anx6345_clear_bits(anx6345->map[I2C_IDX_TXCOM], 103 SP_POWERDOWN_CTRL_REG, 104 SP_TOTAL_PD); 105 if (err) 106 return err; 107 108 err = drm_dp_dpcd_readb(&anx6345->aux, DP_MAX_LINK_RATE, &dp_bw); 109 if (err < 0) 110 return err; 111 112 switch (dp_bw) { 113 case DP_LINK_BW_1_62: 114 case DP_LINK_BW_2_7: 115 break; 116 117 default: 118 DRM_DEBUG_KMS("DP bandwidth (%#02x) not supported\n", dp_bw); 119 return -EINVAL; 120 } 121 122 err = anx6345_set_bits(anx6345->map[I2C_IDX_TXCOM], SP_VID_CTRL1_REG, 123 SP_VIDEO_MUTE); 124 if (err) 125 return err; 126 127 err = anx6345_clear_bits(anx6345->map[I2C_IDX_TXCOM], 128 SP_VID_CTRL1_REG, SP_VIDEO_EN); 129 if (err) 130 return err; 131 132 /* Get DPCD info */ 133 err = drm_dp_dpcd_read(&anx6345->aux, DP_DPCD_REV, 134 &anx6345->dpcd, DP_RECEIVER_CAP_SIZE); 135 if (err < 0) { 136 DRM_ERROR("Failed to read DPCD: %d\n", err); 137 return err; 138 } 139 140 /* Clear channel x SERDES power down */ 141 err = anx6345_clear_bits(anx6345->map[I2C_IDX_DPTX], 142 SP_DP_ANALOG_POWER_DOWN_REG, SP_CH0_PD); 143 if (err) 144 return err; 145 146 drm_dp_link_power_up(&anx6345->aux, anx6345->dpcd[DP_DPCD_REV]); 147 148 /* Possibly enable downspread on the sink */ 149 err = regmap_write(anx6345->map[I2C_IDX_DPTX], 150 SP_DP_DOWNSPREAD_CTRL1_REG, 0); 151 if (err) 152 return err; 153 154 if (anx6345->dpcd[DP_MAX_DOWNSPREAD] & DP_MAX_DOWNSPREAD_0_5) { 155 DRM_DEBUG("Enable downspread on the sink\n"); 156 /* 4000PPM */ 157 err = regmap_write(anx6345->map[I2C_IDX_DPTX], 158 SP_DP_DOWNSPREAD_CTRL1_REG, 8); 159 if (err) 160 return err; 161 162 err = drm_dp_dpcd_writeb(&anx6345->aux, DP_DOWNSPREAD_CTRL, 163 DP_SPREAD_AMP_0_5); 164 if (err < 0) 165 return err; 166 } else { 167 err = drm_dp_dpcd_writeb(&anx6345->aux, DP_DOWNSPREAD_CTRL, 0); 168 if (err < 0) 169 return err; 170 } 171 172 /* Set the lane count and the link rate on the sink */ 173 if (drm_dp_enhanced_frame_cap(anx6345->dpcd)) 174 err = anx6345_set_bits(anx6345->map[I2C_IDX_DPTX], 175 SP_DP_SYSTEM_CTRL_BASE + 4, 176 SP_ENHANCED_MODE); 177 else 178 err = anx6345_clear_bits(anx6345->map[I2C_IDX_DPTX], 179 SP_DP_SYSTEM_CTRL_BASE + 4, 180 SP_ENHANCED_MODE); 181 if (err) 182 return err; 183 184 dpcd[0] = dp_bw; 185 err = regmap_write(anx6345->map[I2C_IDX_DPTX], 186 SP_DP_MAIN_LINK_BW_SET_REG, dpcd[0]); 187 if (err) 188 return err; 189 190 dpcd[1] = drm_dp_max_lane_count(anx6345->dpcd); 191 192 err = regmap_write(anx6345->map[I2C_IDX_DPTX], 193 SP_DP_LANE_COUNT_SET_REG, dpcd[1]); 194 if (err) 195 return err; 196 197 if (drm_dp_enhanced_frame_cap(anx6345->dpcd)) 198 dpcd[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN; 199 200 err = drm_dp_dpcd_write(&anx6345->aux, DP_LINK_BW_SET, dpcd, 201 sizeof(dpcd)); 202 203 if (err < 0) { 204 DRM_ERROR("Failed to configure link: %d\n", err); 205 return err; 206 } 207 208 /* Start training on the source */ 209 err = regmap_write(anx6345->map[I2C_IDX_DPTX], SP_DP_LT_CTRL_REG, 210 SP_LT_EN); 211 if (err) 212 return err; 213 214 return regmap_read_poll_timeout(anx6345->map[I2C_IDX_DPTX], 215 SP_DP_LT_CTRL_REG, 216 value, !(value & SP_DP_LT_INPROGRESS), 217 POLL_DELAY, POLL_TIMEOUT); 218 } 219 220 static int anx6345_tx_initialization(struct anx6345 *anx6345) 221 { 222 int err, i; 223 224 /* FIXME: colordepth is hardcoded for now */ 225 err = regmap_write(anx6345->map[I2C_IDX_TXCOM], SP_VID_CTRL2_REG, 226 SP_IN_BPC_6BIT << SP_IN_BPC_SHIFT); 227 if (err) 228 return err; 229 230 err = regmap_write(anx6345->map[I2C_IDX_DPTX], SP_DP_PLL_CTRL_REG, 0); 231 if (err) 232 return err; 233 234 err = regmap_write(anx6345->map[I2C_IDX_TXCOM], 235 SP_ANALOG_DEBUG1_REG, 0); 236 if (err) 237 return err; 238 239 err = regmap_write(anx6345->map[I2C_IDX_DPTX], 240 SP_DP_LINK_DEBUG_CTRL_REG, 241 SP_NEW_PRBS7 | SP_M_VID_DEBUG); 242 if (err) 243 return err; 244 245 err = regmap_write(anx6345->map[I2C_IDX_DPTX], 246 SP_DP_ANALOG_POWER_DOWN_REG, 0); 247 if (err) 248 return err; 249 250 /* Force HPD */ 251 err = anx6345_set_bits(anx6345->map[I2C_IDX_DPTX], 252 SP_DP_SYSTEM_CTRL_BASE + 3, 253 SP_HPD_FORCE | SP_HPD_CTRL); 254 if (err) 255 return err; 256 257 for (i = 0; i < 4; i++) { 258 /* 4 lanes */ 259 err = regmap_write(anx6345->map[I2C_IDX_DPTX], 260 SP_DP_LANE0_LT_CTRL_REG + i, 0); 261 if (err) 262 return err; 263 } 264 265 /* Reset AUX */ 266 err = anx6345_set_bits(anx6345->map[I2C_IDX_TXCOM], 267 SP_RESET_CTRL2_REG, SP_AUX_RST); 268 if (err) 269 return err; 270 271 return anx6345_clear_bits(anx6345->map[I2C_IDX_TXCOM], 272 SP_RESET_CTRL2_REG, SP_AUX_RST); 273 } 274 275 static void anx6345_poweron(struct anx6345 *anx6345) 276 { 277 int err; 278 279 /* Ensure reset is asserted before starting power on sequence */ 280 gpiod_set_value_cansleep(anx6345->gpiod_reset, 1); 281 usleep_range(1000, 2000); 282 283 err = regulator_enable(anx6345->dvdd12); 284 if (err) { 285 DRM_ERROR("Failed to enable dvdd12 regulator: %d\n", 286 err); 287 return; 288 } 289 290 /* T1 - delay between VDD12 and VDD25 should be 0-2ms */ 291 usleep_range(1000, 2000); 292 293 err = regulator_enable(anx6345->dvdd25); 294 if (err) { 295 DRM_ERROR("Failed to enable dvdd25 regulator: %d\n", 296 err); 297 return; 298 } 299 300 /* T2 - delay between RESETN and all power rail stable, 301 * should be 2-5ms 302 */ 303 usleep_range(2000, 5000); 304 305 gpiod_set_value_cansleep(anx6345->gpiod_reset, 0); 306 307 /* Power on registers module */ 308 anx6345_set_bits(anx6345->map[I2C_IDX_TXCOM], SP_POWERDOWN_CTRL_REG, 309 SP_HDCP_PD | SP_AUDIO_PD | SP_VIDEO_PD | SP_LINK_PD); 310 anx6345_clear_bits(anx6345->map[I2C_IDX_TXCOM], SP_POWERDOWN_CTRL_REG, 311 SP_REGISTER_PD | SP_TOTAL_PD); 312 313 if (anx6345->panel) 314 drm_panel_prepare(anx6345->panel); 315 316 anx6345->powered = true; 317 } 318 319 static void anx6345_poweroff(struct anx6345 *anx6345) 320 { 321 int err; 322 323 gpiod_set_value_cansleep(anx6345->gpiod_reset, 1); 324 usleep_range(1000, 2000); 325 326 if (anx6345->panel) 327 drm_panel_unprepare(anx6345->panel); 328 329 err = regulator_disable(anx6345->dvdd25); 330 if (err) { 331 DRM_ERROR("Failed to disable dvdd25 regulator: %d\n", 332 err); 333 return; 334 } 335 336 usleep_range(5000, 10000); 337 338 err = regulator_disable(anx6345->dvdd12); 339 if (err) { 340 DRM_ERROR("Failed to disable dvdd12 regulator: %d\n", 341 err); 342 return; 343 } 344 345 usleep_range(1000, 2000); 346 347 anx6345->powered = false; 348 } 349 350 static int anx6345_start(struct anx6345 *anx6345) 351 { 352 int err; 353 354 if (!anx6345->powered) 355 anx6345_poweron(anx6345); 356 357 /* Power on needed modules */ 358 err = anx6345_clear_bits(anx6345->map[I2C_IDX_TXCOM], 359 SP_POWERDOWN_CTRL_REG, 360 SP_VIDEO_PD | SP_LINK_PD); 361 362 err = anx6345_tx_initialization(anx6345); 363 if (err) { 364 DRM_ERROR("Failed eDP transmitter initialization: %d\n", err); 365 anx6345_poweroff(anx6345); 366 return err; 367 } 368 369 err = anx6345_dp_link_training(anx6345); 370 if (err) { 371 DRM_ERROR("Failed link training: %d\n", err); 372 anx6345_poweroff(anx6345); 373 return err; 374 } 375 376 /* 377 * This delay seems to help keep the hardware in a good state. Without 378 * it, there are times where it fails silently. 379 */ 380 usleep_range(10000, 15000); 381 382 return 0; 383 } 384 385 static int anx6345_config_dp_output(struct anx6345 *anx6345) 386 { 387 int err; 388 389 err = anx6345_clear_bits(anx6345->map[I2C_IDX_TXCOM], SP_VID_CTRL1_REG, 390 SP_VIDEO_MUTE); 391 if (err) 392 return err; 393 394 /* Enable DP output */ 395 err = anx6345_set_bits(anx6345->map[I2C_IDX_TXCOM], SP_VID_CTRL1_REG, 396 SP_VIDEO_EN); 397 if (err) 398 return err; 399 400 /* Force stream valid */ 401 return anx6345_set_bits(anx6345->map[I2C_IDX_DPTX], 402 SP_DP_SYSTEM_CTRL_BASE + 3, 403 SP_STRM_FORCE | SP_STRM_CTRL); 404 } 405 406 static int anx6345_get_downstream_info(struct anx6345 *anx6345) 407 { 408 u8 value; 409 int err; 410 411 err = drm_dp_dpcd_readb(&anx6345->aux, DP_SINK_COUNT, &value); 412 if (err < 0) { 413 DRM_ERROR("Get sink count failed %d\n", err); 414 return err; 415 } 416 417 if (!DP_GET_SINK_COUNT(value)) { 418 DRM_ERROR("Downstream disconnected\n"); 419 return -EIO; 420 } 421 422 return 0; 423 } 424 425 static int anx6345_get_modes(struct drm_connector *connector) 426 { 427 struct anx6345 *anx6345 = connector_to_anx6345(connector); 428 int err, num_modes = 0; 429 bool power_off = false; 430 431 mutex_lock(&anx6345->lock); 432 433 if (!anx6345->drm_edid) { 434 if (!anx6345->powered) { 435 anx6345_poweron(anx6345); 436 power_off = true; 437 } 438 439 err = anx6345_get_downstream_info(anx6345); 440 if (err) { 441 DRM_ERROR("Failed to get downstream info: %d\n", err); 442 goto unlock; 443 } 444 445 anx6345->drm_edid = drm_edid_read_ddc(connector, &anx6345->aux.ddc); 446 if (!anx6345->drm_edid) 447 DRM_ERROR("Failed to read EDID from panel\n"); 448 449 err = drm_edid_connector_update(connector, anx6345->drm_edid); 450 if (err) { 451 DRM_ERROR("Failed to update EDID property: %d\n", err); 452 goto unlock; 453 } 454 } 455 456 num_modes += drm_edid_connector_add_modes(connector); 457 458 /* Driver currently supports only 6bpc */ 459 connector->display_info.bpc = 6; 460 461 unlock: 462 if (power_off) 463 anx6345_poweroff(anx6345); 464 465 mutex_unlock(&anx6345->lock); 466 467 if (!num_modes && anx6345->panel) 468 num_modes += drm_panel_get_modes(anx6345->panel, connector); 469 470 return num_modes; 471 } 472 473 static const struct drm_connector_helper_funcs anx6345_connector_helper_funcs = { 474 .get_modes = anx6345_get_modes, 475 }; 476 477 static void 478 anx6345_connector_destroy(struct drm_connector *connector) 479 { 480 drm_connector_cleanup(connector); 481 } 482 483 static const struct drm_connector_funcs anx6345_connector_funcs = { 484 .fill_modes = drm_helper_probe_single_connector_modes, 485 .destroy = anx6345_connector_destroy, 486 .reset = drm_atomic_helper_connector_reset, 487 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 488 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 489 }; 490 491 static int anx6345_bridge_attach(struct drm_bridge *bridge, 492 struct drm_encoder *encoder, 493 enum drm_bridge_attach_flags flags) 494 { 495 struct anx6345 *anx6345 = bridge_to_anx6345(bridge); 496 int err; 497 498 if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR) { 499 DRM_ERROR("Fix bridge driver to make connector optional!"); 500 return -EINVAL; 501 } 502 503 /* Register aux channel */ 504 anx6345->aux.name = "DP-AUX"; 505 anx6345->aux.dev = &anx6345->client->dev; 506 anx6345->aux.drm_dev = bridge->dev; 507 anx6345->aux.transfer = anx6345_aux_transfer; 508 509 err = drm_dp_aux_register(&anx6345->aux); 510 if (err < 0) { 511 DRM_ERROR("Failed to register aux channel: %d\n", err); 512 return err; 513 } 514 515 err = drm_connector_init(bridge->dev, &anx6345->connector, 516 &anx6345_connector_funcs, 517 DRM_MODE_CONNECTOR_eDP); 518 if (err) { 519 DRM_ERROR("Failed to initialize connector: %d\n", err); 520 goto aux_unregister; 521 } 522 523 drm_connector_helper_add(&anx6345->connector, 524 &anx6345_connector_helper_funcs); 525 526 anx6345->connector.polled = DRM_CONNECTOR_POLL_HPD; 527 528 err = drm_connector_attach_encoder(&anx6345->connector, 529 encoder); 530 if (err) { 531 DRM_ERROR("Failed to link up connector to encoder: %d\n", err); 532 goto connector_cleanup; 533 } 534 535 err = drm_connector_register(&anx6345->connector); 536 if (err) { 537 DRM_ERROR("Failed to register connector: %d\n", err); 538 goto connector_cleanup; 539 } 540 541 return 0; 542 connector_cleanup: 543 drm_connector_cleanup(&anx6345->connector); 544 aux_unregister: 545 drm_dp_aux_unregister(&anx6345->aux); 546 return err; 547 } 548 549 static void anx6345_bridge_detach(struct drm_bridge *bridge) 550 { 551 drm_dp_aux_unregister(&bridge_to_anx6345(bridge)->aux); 552 } 553 554 static enum drm_mode_status 555 anx6345_bridge_mode_valid(struct drm_bridge *bridge, 556 const struct drm_display_info *info, 557 const struct drm_display_mode *mode) 558 { 559 if (mode->flags & DRM_MODE_FLAG_INTERLACE) 560 return MODE_NO_INTERLACE; 561 562 /* Max 1200p at 5.4 Ghz, one lane */ 563 if (mode->clock > 154000) 564 return MODE_CLOCK_HIGH; 565 566 return MODE_OK; 567 } 568 569 static void anx6345_bridge_disable(struct drm_bridge *bridge) 570 { 571 struct anx6345 *anx6345 = bridge_to_anx6345(bridge); 572 573 /* Power off all modules except configuration registers access */ 574 anx6345_set_bits(anx6345->map[I2C_IDX_TXCOM], SP_POWERDOWN_CTRL_REG, 575 SP_HDCP_PD | SP_AUDIO_PD | SP_VIDEO_PD | SP_LINK_PD); 576 if (anx6345->panel) 577 drm_panel_disable(anx6345->panel); 578 579 if (anx6345->powered) 580 anx6345_poweroff(anx6345); 581 } 582 583 static void anx6345_bridge_enable(struct drm_bridge *bridge) 584 { 585 struct anx6345 *anx6345 = bridge_to_anx6345(bridge); 586 int err; 587 588 if (anx6345->panel) 589 drm_panel_enable(anx6345->panel); 590 591 err = anx6345_start(anx6345); 592 if (err) { 593 DRM_ERROR("Failed to initialize: %d\n", err); 594 return; 595 } 596 597 err = anx6345_config_dp_output(anx6345); 598 if (err) 599 DRM_ERROR("Failed to enable DP output: %d\n", err); 600 } 601 602 static const struct drm_bridge_funcs anx6345_bridge_funcs = { 603 .attach = anx6345_bridge_attach, 604 .detach = anx6345_bridge_detach, 605 .mode_valid = anx6345_bridge_mode_valid, 606 .disable = anx6345_bridge_disable, 607 .enable = anx6345_bridge_enable, 608 }; 609 610 static void unregister_i2c_dummy_clients(struct anx6345 *anx6345) 611 { 612 unsigned int i; 613 614 for (i = 1; i < ARRAY_SIZE(anx6345->i2c_clients); i++) 615 if (anx6345->i2c_clients[i] && 616 anx6345->i2c_clients[i]->addr != anx6345->client->addr) 617 i2c_unregister_device(anx6345->i2c_clients[i]); 618 } 619 620 static const struct regmap_config anx6345_regmap_config = { 621 .reg_bits = 8, 622 .val_bits = 8, 623 .max_register = 0xff, 624 .cache_type = REGCACHE_NONE, 625 }; 626 627 static const u16 anx6345_chipid_list[] = { 628 0x6345, 629 }; 630 631 static bool anx6345_get_chip_id(struct anx6345 *anx6345) 632 { 633 unsigned int i, idl, idh, version; 634 635 if (regmap_read(anx6345->map[I2C_IDX_TXCOM], SP_DEVICE_IDL_REG, &idl)) 636 return false; 637 638 if (regmap_read(anx6345->map[I2C_IDX_TXCOM], SP_DEVICE_IDH_REG, &idh)) 639 return false; 640 641 anx6345->chipid = (u8)idl | ((u8)idh << 8); 642 643 if (regmap_read(anx6345->map[I2C_IDX_TXCOM], SP_DEVICE_VERSION_REG, 644 &version)) 645 return false; 646 647 for (i = 0; i < ARRAY_SIZE(anx6345_chipid_list); i++) { 648 if (anx6345->chipid == anx6345_chipid_list[i]) { 649 DRM_INFO("Found ANX%x (ver. %d) eDP Transmitter\n", 650 anx6345->chipid, version); 651 return true; 652 } 653 } 654 655 DRM_ERROR("ANX%x (ver. %d) not supported by this driver\n", 656 anx6345->chipid, version); 657 658 return false; 659 } 660 661 static int anx6345_i2c_probe(struct i2c_client *client) 662 { 663 struct anx6345 *anx6345; 664 struct device *dev; 665 int i, err; 666 667 anx6345 = devm_drm_bridge_alloc(&client->dev, struct anx6345, bridge, 668 &anx6345_bridge_funcs); 669 if (IS_ERR(anx6345)) 670 return PTR_ERR(anx6345); 671 672 mutex_init(&anx6345->lock); 673 674 anx6345->bridge.of_node = client->dev.of_node; 675 676 anx6345->client = client; 677 i2c_set_clientdata(client, anx6345); 678 679 dev = &anx6345->client->dev; 680 681 err = drm_of_find_panel_or_bridge(client->dev.of_node, 1, 0, 682 &anx6345->panel, NULL); 683 if (err == -EPROBE_DEFER) 684 return err; 685 686 if (err) 687 DRM_DEBUG("No panel found\n"); 688 689 /* 1.2V digital core power regulator */ 690 anx6345->dvdd12 = devm_regulator_get(dev, "dvdd12"); 691 if (IS_ERR(anx6345->dvdd12)) { 692 if (PTR_ERR(anx6345->dvdd12) != -EPROBE_DEFER) 693 DRM_ERROR("Failed to get dvdd12 supply (%ld)\n", 694 PTR_ERR(anx6345->dvdd12)); 695 return PTR_ERR(anx6345->dvdd12); 696 } 697 698 /* 2.5V digital core power regulator */ 699 anx6345->dvdd25 = devm_regulator_get(dev, "dvdd25"); 700 if (IS_ERR(anx6345->dvdd25)) { 701 if (PTR_ERR(anx6345->dvdd25) != -EPROBE_DEFER) 702 DRM_ERROR("Failed to get dvdd25 supply (%ld)\n", 703 PTR_ERR(anx6345->dvdd25)); 704 return PTR_ERR(anx6345->dvdd25); 705 } 706 707 /* GPIO for chip reset */ 708 anx6345->gpiod_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); 709 if (IS_ERR(anx6345->gpiod_reset)) { 710 DRM_ERROR("Reset gpio not found\n"); 711 return PTR_ERR(anx6345->gpiod_reset); 712 } 713 714 /* Map slave addresses of ANX6345 */ 715 for (i = 0; i < I2C_NUM_ADDRESSES; i++) { 716 if (anx6345_i2c_addresses[i] >> 1 != client->addr) 717 anx6345->i2c_clients[i] = i2c_new_dummy_device(client->adapter, 718 anx6345_i2c_addresses[i] >> 1); 719 else 720 anx6345->i2c_clients[i] = client; 721 722 if (IS_ERR(anx6345->i2c_clients[i])) { 723 err = PTR_ERR(anx6345->i2c_clients[i]); 724 DRM_ERROR("Failed to reserve I2C bus %02x\n", 725 anx6345_i2c_addresses[i]); 726 goto err_unregister_i2c; 727 } 728 729 anx6345->map[i] = devm_regmap_init_i2c(anx6345->i2c_clients[i], 730 &anx6345_regmap_config); 731 if (IS_ERR(anx6345->map[i])) { 732 err = PTR_ERR(anx6345->map[i]); 733 DRM_ERROR("Failed regmap initialization %02x\n", 734 anx6345_i2c_addresses[i]); 735 goto err_unregister_i2c; 736 } 737 } 738 739 /* Look for supported chip ID */ 740 anx6345_poweron(anx6345); 741 if (anx6345_get_chip_id(anx6345)) { 742 drm_bridge_add(&anx6345->bridge); 743 744 return 0; 745 } else { 746 anx6345_poweroff(anx6345); 747 err = -ENODEV; 748 } 749 750 err_unregister_i2c: 751 unregister_i2c_dummy_clients(anx6345); 752 return err; 753 } 754 755 static void anx6345_i2c_remove(struct i2c_client *client) 756 { 757 struct anx6345 *anx6345 = i2c_get_clientdata(client); 758 759 drm_bridge_remove(&anx6345->bridge); 760 761 unregister_i2c_dummy_clients(anx6345); 762 763 drm_edid_free(anx6345->drm_edid); 764 765 mutex_destroy(&anx6345->lock); 766 } 767 768 static const struct i2c_device_id anx6345_id[] = { 769 { "anx6345" }, 770 { /* sentinel */ } 771 }; 772 MODULE_DEVICE_TABLE(i2c, anx6345_id); 773 774 static const struct of_device_id anx6345_match_table[] = { 775 { .compatible = "analogix,anx6345", }, 776 { /* sentinel */ }, 777 }; 778 MODULE_DEVICE_TABLE(of, anx6345_match_table); 779 780 static struct i2c_driver anx6345_driver = { 781 .driver = { 782 .name = "anx6345", 783 .of_match_table = anx6345_match_table, 784 }, 785 .probe = anx6345_i2c_probe, 786 .remove = anx6345_i2c_remove, 787 .id_table = anx6345_id, 788 }; 789 module_i2c_driver(anx6345_driver); 790 791 MODULE_DESCRIPTION("ANX6345 eDP Transmitter driver"); 792 MODULE_AUTHOR("Icenowy Zheng <icenowy@aosc.io>"); 793 MODULE_LICENSE("GPL v2"); 794