1 /* 2 * Copyright (C) 2013, NVIDIA Corporation. All rights reserved. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sub license, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice (including the 12 * next paragraph) shall be included in all copies or substantial portions 13 * of the Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 21 * DEALINGS IN THE SOFTWARE. 22 */ 23 24 #include <linux/debugfs.h> 25 #include <linux/delay.h> 26 #include <linux/gpio/consumer.h> 27 #include <linux/iopoll.h> 28 #include <linux/module.h> 29 #include <linux/of_platform.h> 30 #include <linux/platform_device.h> 31 #include <linux/pm_runtime.h> 32 #include <linux/regulator/consumer.h> 33 34 #include <video/display_timing.h> 35 #include <video/of_display_timing.h> 36 #include <video/videomode.h> 37 38 #include <drm/display/drm_dp_aux_bus.h> 39 #include <drm/display/drm_dp_helper.h> 40 #include <drm/drm_crtc.h> 41 #include <drm/drm_device.h> 42 #include <drm/drm_edid.h> 43 #include <drm/drm_panel.h> 44 45 /** 46 * struct panel_delay - Describes delays for a simple panel. 47 */ 48 struct panel_delay { 49 /** 50 * @hpd_reliable: Time for HPD to be reliable 51 * 52 * The time (in milliseconds) that it takes after powering the panel 53 * before the HPD signal is reliable. Ideally this is 0 but some panels, 54 * board designs, or bad pulldown configs can cause a glitch here. 55 * 56 * NOTE: on some old panel data this number appers to be much too big. 57 * Presumably some old panels simply didn't have HPD hooked up and put 58 * the hpd_absent here because this field predates the 59 * hpd_absent. While that works, it's non-ideal. 60 */ 61 unsigned int hpd_reliable; 62 63 /** 64 * @hpd_absent: Time to wait if HPD isn't hooked up. 65 * 66 * Add this to the prepare delay if we know Hot Plug Detect isn't used. 67 * 68 * This is T3-max on eDP timing diagrams or the delay from power on 69 * until HPD is guaranteed to be asserted. 70 */ 71 unsigned int hpd_absent; 72 73 /** 74 * @prepare_to_enable: Time between prepare and enable. 75 * 76 * The minimum time, in milliseconds, that needs to have passed 77 * between when prepare finished and enable may begin. If at 78 * enable time less time has passed since prepare finished, 79 * the driver waits for the remaining time. 80 * 81 * If a fixed enable delay is also specified, we'll start 82 * counting before delaying for the fixed delay. 83 * 84 * If a fixed prepare delay is also specified, we won't start 85 * counting until after the fixed delay. We can't overlap this 86 * fixed delay with the min time because the fixed delay 87 * doesn't happen at the end of the function if a HPD GPIO was 88 * specified. 89 * 90 * In other words: 91 * prepare() 92 * ... 93 * // do fixed prepare delay 94 * // wait for HPD GPIO if applicable 95 * // start counting for prepare_to_enable 96 * 97 * enable() 98 * // do fixed enable delay 99 * // enforce prepare_to_enable min time 100 * 101 * This is not specified in a standard way on eDP timing diagrams. 102 * It is effectively the time from HPD going high till you can 103 * turn on the backlight. 104 */ 105 unsigned int prepare_to_enable; 106 107 /** 108 * @enable: Time for the panel to display a valid frame. 109 * 110 * The time (in milliseconds) that it takes for the panel to 111 * display the first valid frame after starting to receive 112 * video data. 113 * 114 * This is (T6-min + max(T7-max, T8-min)) on eDP timing diagrams or 115 * the delay after link training finishes until we can turn the 116 * backlight on and see valid data. 117 */ 118 unsigned int enable; 119 120 /** 121 * @disable: Time for the panel to turn the display off. 122 * 123 * The time (in milliseconds) that it takes for the panel to 124 * turn the display off (no content is visible). 125 * 126 * This is T9-min (delay from backlight off to end of valid video 127 * data) on eDP timing diagrams. It is not common to set. 128 */ 129 unsigned int disable; 130 131 /** 132 * @unprepare: Time to power down completely. 133 * 134 * The time (in milliseconds) that it takes for the panel 135 * to power itself down completely. 136 * 137 * This time is used to prevent a future "prepare" from 138 * starting until at least this many milliseconds has passed. 139 * If at prepare time less time has passed since unprepare 140 * finished, the driver waits for the remaining time. 141 * 142 * This is T12-min on eDP timing diagrams. 143 */ 144 unsigned int unprepare; 145 }; 146 147 /** 148 * struct panel_desc - Describes a simple panel. 149 */ 150 struct panel_desc { 151 /** 152 * @modes: Pointer to array of fixed modes appropriate for this panel. 153 * 154 * If only one mode then this can just be the address of the mode. 155 * NOTE: cannot be used with "timings" and also if this is specified 156 * then you cannot override the mode in the device tree. 157 */ 158 const struct drm_display_mode *modes; 159 160 /** @num_modes: Number of elements in modes array. */ 161 unsigned int num_modes; 162 163 /** 164 * @timings: Pointer to array of display timings 165 * 166 * NOTE: cannot be used with "modes" and also these will be used to 167 * validate a device tree override if one is present. 168 */ 169 const struct display_timing *timings; 170 171 /** @num_timings: Number of elements in timings array. */ 172 unsigned int num_timings; 173 174 /** @bpc: Bits per color. */ 175 unsigned int bpc; 176 177 /** @size: Structure containing the physical size of this panel. */ 178 struct { 179 /** 180 * @size.width: Width (in mm) of the active display area. 181 */ 182 unsigned int width; 183 184 /** 185 * @size.height: Height (in mm) of the active display area. 186 */ 187 unsigned int height; 188 } size; 189 190 /** @delay: Structure containing various delay values for this panel. */ 191 struct panel_delay delay; 192 }; 193 194 /** 195 * struct edp_panel_entry - Maps panel ID to delay / panel name. 196 */ 197 struct edp_panel_entry { 198 /** @panel_id: 32-bit ID for panel, encoded with drm_edid_encode_panel_id(). */ 199 u32 panel_id; 200 201 /** @delay: The power sequencing delays needed for this panel. */ 202 const struct panel_delay *delay; 203 204 /** @name: Name of this panel (for printing to logs). */ 205 const char *name; 206 }; 207 208 struct panel_edp { 209 struct drm_panel base; 210 bool enabled; 211 bool no_hpd; 212 213 bool prepared; 214 215 ktime_t prepared_time; 216 ktime_t unprepared_time; 217 218 const struct panel_desc *desc; 219 220 struct regulator *supply; 221 struct i2c_adapter *ddc; 222 struct drm_dp_aux *aux; 223 224 struct gpio_desc *enable_gpio; 225 struct gpio_desc *hpd_gpio; 226 227 const struct edp_panel_entry *detected_panel; 228 229 struct edid *edid; 230 231 struct drm_display_mode override_mode; 232 233 enum drm_panel_orientation orientation; 234 }; 235 236 static inline struct panel_edp *to_panel_edp(struct drm_panel *panel) 237 { 238 return container_of(panel, struct panel_edp, base); 239 } 240 241 static unsigned int panel_edp_get_timings_modes(struct panel_edp *panel, 242 struct drm_connector *connector) 243 { 244 struct drm_display_mode *mode; 245 unsigned int i, num = 0; 246 247 for (i = 0; i < panel->desc->num_timings; i++) { 248 const struct display_timing *dt = &panel->desc->timings[i]; 249 struct videomode vm; 250 251 videomode_from_timing(dt, &vm); 252 mode = drm_mode_create(connector->dev); 253 if (!mode) { 254 dev_err(panel->base.dev, "failed to add mode %ux%u\n", 255 dt->hactive.typ, dt->vactive.typ); 256 continue; 257 } 258 259 drm_display_mode_from_videomode(&vm, mode); 260 261 mode->type |= DRM_MODE_TYPE_DRIVER; 262 263 if (panel->desc->num_timings == 1) 264 mode->type |= DRM_MODE_TYPE_PREFERRED; 265 266 drm_mode_probed_add(connector, mode); 267 num++; 268 } 269 270 return num; 271 } 272 273 static unsigned int panel_edp_get_display_modes(struct panel_edp *panel, 274 struct drm_connector *connector) 275 { 276 struct drm_display_mode *mode; 277 unsigned int i, num = 0; 278 279 for (i = 0; i < panel->desc->num_modes; i++) { 280 const struct drm_display_mode *m = &panel->desc->modes[i]; 281 282 mode = drm_mode_duplicate(connector->dev, m); 283 if (!mode) { 284 dev_err(panel->base.dev, "failed to add mode %ux%u@%u\n", 285 m->hdisplay, m->vdisplay, 286 drm_mode_vrefresh(m)); 287 continue; 288 } 289 290 mode->type |= DRM_MODE_TYPE_DRIVER; 291 292 if (panel->desc->num_modes == 1) 293 mode->type |= DRM_MODE_TYPE_PREFERRED; 294 295 drm_mode_set_name(mode); 296 297 drm_mode_probed_add(connector, mode); 298 num++; 299 } 300 301 return num; 302 } 303 304 static int panel_edp_get_non_edid_modes(struct panel_edp *panel, 305 struct drm_connector *connector) 306 { 307 struct drm_display_mode *mode; 308 bool has_override = panel->override_mode.type; 309 unsigned int num = 0; 310 311 if (!panel->desc) 312 return 0; 313 314 if (has_override) { 315 mode = drm_mode_duplicate(connector->dev, 316 &panel->override_mode); 317 if (mode) { 318 drm_mode_probed_add(connector, mode); 319 num = 1; 320 } else { 321 dev_err(panel->base.dev, "failed to add override mode\n"); 322 } 323 } 324 325 /* Only add timings if override was not there or failed to validate */ 326 if (num == 0 && panel->desc->num_timings) 327 num = panel_edp_get_timings_modes(panel, connector); 328 329 /* 330 * Only add fixed modes if timings/override added no mode. 331 * 332 * We should only ever have either the display timings specified 333 * or a fixed mode. Anything else is rather bogus. 334 */ 335 WARN_ON(panel->desc->num_timings && panel->desc->num_modes); 336 if (num == 0) 337 num = panel_edp_get_display_modes(panel, connector); 338 339 connector->display_info.bpc = panel->desc->bpc; 340 connector->display_info.width_mm = panel->desc->size.width; 341 connector->display_info.height_mm = panel->desc->size.height; 342 343 return num; 344 } 345 346 static void panel_edp_wait(ktime_t start_ktime, unsigned int min_ms) 347 { 348 ktime_t now_ktime, min_ktime; 349 350 if (!min_ms) 351 return; 352 353 min_ktime = ktime_add(start_ktime, ms_to_ktime(min_ms)); 354 now_ktime = ktime_get(); 355 356 if (ktime_before(now_ktime, min_ktime)) 357 msleep(ktime_to_ms(ktime_sub(min_ktime, now_ktime)) + 1); 358 } 359 360 static int panel_edp_disable(struct drm_panel *panel) 361 { 362 struct panel_edp *p = to_panel_edp(panel); 363 364 if (!p->enabled) 365 return 0; 366 367 if (p->desc->delay.disable) 368 msleep(p->desc->delay.disable); 369 370 p->enabled = false; 371 372 return 0; 373 } 374 375 static int panel_edp_suspend(struct device *dev) 376 { 377 struct panel_edp *p = dev_get_drvdata(dev); 378 379 gpiod_set_value_cansleep(p->enable_gpio, 0); 380 regulator_disable(p->supply); 381 p->unprepared_time = ktime_get(); 382 383 return 0; 384 } 385 386 static int panel_edp_unprepare(struct drm_panel *panel) 387 { 388 struct panel_edp *p = to_panel_edp(panel); 389 int ret; 390 391 /* Unpreparing when already unprepared is a no-op */ 392 if (!p->prepared) 393 return 0; 394 395 pm_runtime_mark_last_busy(panel->dev); 396 ret = pm_runtime_put_autosuspend(panel->dev); 397 if (ret < 0) 398 return ret; 399 p->prepared = false; 400 401 return 0; 402 } 403 404 static int panel_edp_get_hpd_gpio(struct device *dev, struct panel_edp *p) 405 { 406 int err; 407 408 p->hpd_gpio = devm_gpiod_get_optional(dev, "hpd", GPIOD_IN); 409 if (IS_ERR(p->hpd_gpio)) { 410 err = PTR_ERR(p->hpd_gpio); 411 412 if (err != -EPROBE_DEFER) 413 dev_err(dev, "failed to get 'hpd' GPIO: %d\n", err); 414 415 return err; 416 } 417 418 return 0; 419 } 420 421 static bool panel_edp_can_read_hpd(struct panel_edp *p) 422 { 423 return !p->no_hpd && (p->hpd_gpio || (p->aux && p->aux->wait_hpd_asserted)); 424 } 425 426 static int panel_edp_prepare_once(struct panel_edp *p) 427 { 428 struct device *dev = p->base.dev; 429 unsigned int delay; 430 int err; 431 int hpd_asserted; 432 unsigned long hpd_wait_us; 433 434 panel_edp_wait(p->unprepared_time, p->desc->delay.unprepare); 435 436 err = regulator_enable(p->supply); 437 if (err < 0) { 438 dev_err(dev, "failed to enable supply: %d\n", err); 439 return err; 440 } 441 442 gpiod_set_value_cansleep(p->enable_gpio, 1); 443 444 delay = p->desc->delay.hpd_reliable; 445 if (p->no_hpd) 446 delay = max(delay, p->desc->delay.hpd_absent); 447 if (delay) 448 msleep(delay); 449 450 if (panel_edp_can_read_hpd(p)) { 451 if (p->desc->delay.hpd_absent) 452 hpd_wait_us = p->desc->delay.hpd_absent * 1000UL; 453 else 454 hpd_wait_us = 2000000; 455 456 if (p->hpd_gpio) { 457 err = readx_poll_timeout(gpiod_get_value_cansleep, 458 p->hpd_gpio, hpd_asserted, 459 hpd_asserted, 1000, hpd_wait_us); 460 if (hpd_asserted < 0) 461 err = hpd_asserted; 462 } else { 463 err = p->aux->wait_hpd_asserted(p->aux, hpd_wait_us); 464 } 465 466 if (err) { 467 if (err != -ETIMEDOUT) 468 dev_err(dev, 469 "error waiting for hpd GPIO: %d\n", err); 470 goto error; 471 } 472 } 473 474 p->prepared_time = ktime_get(); 475 476 return 0; 477 478 error: 479 gpiod_set_value_cansleep(p->enable_gpio, 0); 480 regulator_disable(p->supply); 481 p->unprepared_time = ktime_get(); 482 483 return err; 484 } 485 486 /* 487 * Some panels simply don't always come up and need to be power cycled to 488 * work properly. We'll allow for a handful of retries. 489 */ 490 #define MAX_PANEL_PREPARE_TRIES 5 491 492 static int panel_edp_resume(struct device *dev) 493 { 494 struct panel_edp *p = dev_get_drvdata(dev); 495 int ret; 496 int try; 497 498 for (try = 0; try < MAX_PANEL_PREPARE_TRIES; try++) { 499 ret = panel_edp_prepare_once(p); 500 if (ret != -ETIMEDOUT) 501 break; 502 } 503 504 if (ret == -ETIMEDOUT) 505 dev_err(dev, "Prepare timeout after %d tries\n", try); 506 else if (try) 507 dev_warn(dev, "Prepare needed %d retries\n", try); 508 509 return ret; 510 } 511 512 static int panel_edp_prepare(struct drm_panel *panel) 513 { 514 struct panel_edp *p = to_panel_edp(panel); 515 int ret; 516 517 /* Preparing when already prepared is a no-op */ 518 if (p->prepared) 519 return 0; 520 521 ret = pm_runtime_get_sync(panel->dev); 522 if (ret < 0) { 523 pm_runtime_put_autosuspend(panel->dev); 524 return ret; 525 } 526 527 p->prepared = true; 528 529 return 0; 530 } 531 532 static int panel_edp_enable(struct drm_panel *panel) 533 { 534 struct panel_edp *p = to_panel_edp(panel); 535 unsigned int delay; 536 537 if (p->enabled) 538 return 0; 539 540 delay = p->desc->delay.enable; 541 542 /* 543 * If there is a "prepare_to_enable" delay then that's supposed to be 544 * the delay from HPD going high until we can turn the backlight on. 545 * However, we can only count this if HPD is readable by the panel 546 * driver. 547 * 548 * If we aren't handling the HPD pin ourselves then the best we 549 * can do is assume that HPD went high immediately before we were 550 * called (and link training took zero time). Note that "no-hpd" 551 * actually counts as handling HPD ourselves since we're doing the 552 * worst case delay (in prepare) ourselves. 553 * 554 * NOTE: if we ever end up in this "if" statement then we're 555 * guaranteed that the panel_edp_wait() call below will do no delay. 556 * It already handles that case, though, so we don't need any special 557 * code for it. 558 */ 559 if (p->desc->delay.prepare_to_enable && 560 !panel_edp_can_read_hpd(p) && !p->no_hpd) 561 delay = max(delay, p->desc->delay.prepare_to_enable); 562 563 if (delay) 564 msleep(delay); 565 566 panel_edp_wait(p->prepared_time, p->desc->delay.prepare_to_enable); 567 568 p->enabled = true; 569 570 return 0; 571 } 572 573 static int panel_edp_get_modes(struct drm_panel *panel, 574 struct drm_connector *connector) 575 { 576 struct panel_edp *p = to_panel_edp(panel); 577 int num = 0; 578 579 /* probe EDID if a DDC bus is available */ 580 if (p->ddc) { 581 pm_runtime_get_sync(panel->dev); 582 583 if (!p->edid) 584 p->edid = drm_get_edid(connector, p->ddc); 585 586 if (p->edid) 587 num += drm_add_edid_modes(connector, p->edid); 588 589 pm_runtime_mark_last_busy(panel->dev); 590 pm_runtime_put_autosuspend(panel->dev); 591 } 592 593 /* 594 * Add hard-coded panel modes. Don't call this if there are no timings 595 * and no modes (the generic edp-panel case) because it will clobber 596 * the display_info that was already set by drm_add_edid_modes(). 597 */ 598 if (p->desc->num_timings || p->desc->num_modes) 599 num += panel_edp_get_non_edid_modes(p, connector); 600 else if (!num) 601 dev_warn(p->base.dev, "No display modes\n"); 602 603 /* 604 * TODO: Remove once all drm drivers call 605 * drm_connector_set_orientation_from_panel() 606 */ 607 drm_connector_set_panel_orientation(connector, p->orientation); 608 609 return num; 610 } 611 612 static int panel_edp_get_timings(struct drm_panel *panel, 613 unsigned int num_timings, 614 struct display_timing *timings) 615 { 616 struct panel_edp *p = to_panel_edp(panel); 617 unsigned int i; 618 619 if (p->desc->num_timings < num_timings) 620 num_timings = p->desc->num_timings; 621 622 if (timings) 623 for (i = 0; i < num_timings; i++) 624 timings[i] = p->desc->timings[i]; 625 626 return p->desc->num_timings; 627 } 628 629 static enum drm_panel_orientation panel_edp_get_orientation(struct drm_panel *panel) 630 { 631 struct panel_edp *p = to_panel_edp(panel); 632 633 return p->orientation; 634 } 635 636 static int detected_panel_show(struct seq_file *s, void *data) 637 { 638 struct drm_panel *panel = s->private; 639 struct panel_edp *p = to_panel_edp(panel); 640 641 if (IS_ERR(p->detected_panel)) 642 seq_puts(s, "UNKNOWN\n"); 643 else if (!p->detected_panel) 644 seq_puts(s, "HARDCODED\n"); 645 else 646 seq_printf(s, "%s\n", p->detected_panel->name); 647 648 return 0; 649 } 650 651 DEFINE_SHOW_ATTRIBUTE(detected_panel); 652 653 static void panel_edp_debugfs_init(struct drm_panel *panel, struct dentry *root) 654 { 655 debugfs_create_file("detected_panel", 0600, root, panel, &detected_panel_fops); 656 } 657 658 static const struct drm_panel_funcs panel_edp_funcs = { 659 .disable = panel_edp_disable, 660 .unprepare = panel_edp_unprepare, 661 .prepare = panel_edp_prepare, 662 .enable = panel_edp_enable, 663 .get_modes = panel_edp_get_modes, 664 .get_orientation = panel_edp_get_orientation, 665 .get_timings = panel_edp_get_timings, 666 .debugfs_init = panel_edp_debugfs_init, 667 }; 668 669 #define PANEL_EDP_BOUNDS_CHECK(to_check, bounds, field) \ 670 (to_check->field.typ >= bounds->field.min && \ 671 to_check->field.typ <= bounds->field.max) 672 static void panel_edp_parse_panel_timing_node(struct device *dev, 673 struct panel_edp *panel, 674 const struct display_timing *ot) 675 { 676 const struct panel_desc *desc = panel->desc; 677 struct videomode vm; 678 unsigned int i; 679 680 if (WARN_ON(desc->num_modes)) { 681 dev_err(dev, "Reject override mode: panel has a fixed mode\n"); 682 return; 683 } 684 if (WARN_ON(!desc->num_timings)) { 685 dev_err(dev, "Reject override mode: no timings specified\n"); 686 return; 687 } 688 689 for (i = 0; i < panel->desc->num_timings; i++) { 690 const struct display_timing *dt = &panel->desc->timings[i]; 691 692 if (!PANEL_EDP_BOUNDS_CHECK(ot, dt, hactive) || 693 !PANEL_EDP_BOUNDS_CHECK(ot, dt, hfront_porch) || 694 !PANEL_EDP_BOUNDS_CHECK(ot, dt, hback_porch) || 695 !PANEL_EDP_BOUNDS_CHECK(ot, dt, hsync_len) || 696 !PANEL_EDP_BOUNDS_CHECK(ot, dt, vactive) || 697 !PANEL_EDP_BOUNDS_CHECK(ot, dt, vfront_porch) || 698 !PANEL_EDP_BOUNDS_CHECK(ot, dt, vback_porch) || 699 !PANEL_EDP_BOUNDS_CHECK(ot, dt, vsync_len)) 700 continue; 701 702 if (ot->flags != dt->flags) 703 continue; 704 705 videomode_from_timing(ot, &vm); 706 drm_display_mode_from_videomode(&vm, &panel->override_mode); 707 panel->override_mode.type |= DRM_MODE_TYPE_DRIVER | 708 DRM_MODE_TYPE_PREFERRED; 709 break; 710 } 711 712 if (WARN_ON(!panel->override_mode.type)) 713 dev_err(dev, "Reject override mode: No display_timing found\n"); 714 } 715 716 static const struct edp_panel_entry *find_edp_panel(u32 panel_id); 717 718 static int generic_edp_panel_probe(struct device *dev, struct panel_edp *panel) 719 { 720 struct panel_desc *desc; 721 u32 panel_id; 722 char vend[4]; 723 u16 product_id; 724 u32 reliable_ms = 0; 725 u32 absent_ms = 0; 726 int ret; 727 728 desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL); 729 if (!desc) 730 return -ENOMEM; 731 panel->desc = desc; 732 733 /* 734 * Read the dts properties for the initial probe. These are used by 735 * the runtime resume code which will get called by the 736 * pm_runtime_get_sync() call below. 737 */ 738 of_property_read_u32(dev->of_node, "hpd-reliable-delay-ms", &reliable_ms); 739 desc->delay.hpd_reliable = reliable_ms; 740 of_property_read_u32(dev->of_node, "hpd-absent-delay-ms", &absent_ms); 741 desc->delay.hpd_absent = absent_ms; 742 743 /* Power the panel on so we can read the EDID */ 744 ret = pm_runtime_get_sync(dev); 745 if (ret < 0) { 746 dev_err(dev, "Couldn't power on panel to read EDID: %d\n", ret); 747 goto exit; 748 } 749 750 panel_id = drm_edid_get_panel_id(panel->ddc); 751 if (!panel_id) { 752 dev_err(dev, "Couldn't identify panel via EDID\n"); 753 ret = -EIO; 754 goto exit; 755 } 756 drm_edid_decode_panel_id(panel_id, vend, &product_id); 757 758 panel->detected_panel = find_edp_panel(panel_id); 759 760 /* 761 * We're using non-optimized timings and want it really obvious that 762 * someone needs to add an entry to the table, so we'll do a WARN_ON 763 * splat. 764 */ 765 if (WARN_ON(!panel->detected_panel)) { 766 dev_warn(dev, 767 "Unknown panel %s %#06x, using conservative timings\n", 768 vend, product_id); 769 770 /* 771 * It's highly likely that the panel will work if we use very 772 * conservative timings, so let's do that. We already know that 773 * the HPD-related delays must have worked since we got this 774 * far, so we really just need the "unprepare" / "enable" 775 * delays. We don't need "prepare_to_enable" since that 776 * overlaps the "enable" delay anyway. 777 * 778 * Nearly all panels have a "unprepare" delay of 500 ms though 779 * there are a few with 1000. Let's stick 2000 in just to be 780 * super conservative. 781 * 782 * An "enable" delay of 80 ms seems the most common, but we'll 783 * throw in 200 ms to be safe. 784 */ 785 desc->delay.unprepare = 2000; 786 desc->delay.enable = 200; 787 788 panel->detected_panel = ERR_PTR(-EINVAL); 789 } else { 790 dev_info(dev, "Detected %s %s (%#06x)\n", 791 vend, panel->detected_panel->name, product_id); 792 793 /* Update the delay; everything else comes from EDID */ 794 desc->delay = *panel->detected_panel->delay; 795 } 796 797 ret = 0; 798 exit: 799 pm_runtime_mark_last_busy(dev); 800 pm_runtime_put_autosuspend(dev); 801 802 return ret; 803 } 804 805 static int panel_edp_probe(struct device *dev, const struct panel_desc *desc, 806 struct drm_dp_aux *aux) 807 { 808 struct panel_edp *panel; 809 struct display_timing dt; 810 struct device_node *ddc; 811 int err; 812 813 panel = devm_kzalloc(dev, sizeof(*panel), GFP_KERNEL); 814 if (!panel) 815 return -ENOMEM; 816 817 panel->enabled = false; 818 panel->prepared_time = 0; 819 panel->desc = desc; 820 panel->aux = aux; 821 822 panel->no_hpd = of_property_read_bool(dev->of_node, "no-hpd"); 823 if (!panel->no_hpd) { 824 err = panel_edp_get_hpd_gpio(dev, panel); 825 if (err) 826 return err; 827 } 828 829 panel->supply = devm_regulator_get(dev, "power"); 830 if (IS_ERR(panel->supply)) 831 return PTR_ERR(panel->supply); 832 833 panel->enable_gpio = devm_gpiod_get_optional(dev, "enable", 834 GPIOD_OUT_LOW); 835 if (IS_ERR(panel->enable_gpio)) { 836 err = PTR_ERR(panel->enable_gpio); 837 if (err != -EPROBE_DEFER) 838 dev_err(dev, "failed to request GPIO: %d\n", err); 839 return err; 840 } 841 842 err = of_drm_get_panel_orientation(dev->of_node, &panel->orientation); 843 if (err) { 844 dev_err(dev, "%pOF: failed to get orientation %d\n", dev->of_node, err); 845 return err; 846 } 847 848 ddc = of_parse_phandle(dev->of_node, "ddc-i2c-bus", 0); 849 if (ddc) { 850 panel->ddc = of_find_i2c_adapter_by_node(ddc); 851 of_node_put(ddc); 852 853 if (!panel->ddc) 854 return -EPROBE_DEFER; 855 } else if (aux) { 856 panel->ddc = &aux->ddc; 857 } 858 859 if (!of_get_display_timing(dev->of_node, "panel-timing", &dt)) 860 panel_edp_parse_panel_timing_node(dev, panel, &dt); 861 862 dev_set_drvdata(dev, panel); 863 864 drm_panel_init(&panel->base, dev, &panel_edp_funcs, DRM_MODE_CONNECTOR_eDP); 865 866 err = drm_panel_of_backlight(&panel->base); 867 if (err) 868 goto err_finished_ddc_init; 869 870 /* 871 * We use runtime PM for prepare / unprepare since those power the panel 872 * on and off and those can be very slow operations. This is important 873 * to optimize powering the panel on briefly to read the EDID before 874 * fully enabling the panel. 875 */ 876 pm_runtime_enable(dev); 877 pm_runtime_set_autosuspend_delay(dev, 1000); 878 pm_runtime_use_autosuspend(dev); 879 880 if (of_device_is_compatible(dev->of_node, "edp-panel")) { 881 err = generic_edp_panel_probe(dev, panel); 882 if (err) { 883 dev_err_probe(dev, err, 884 "Couldn't detect panel nor find a fallback\n"); 885 goto err_finished_pm_runtime; 886 } 887 /* generic_edp_panel_probe() replaces desc in the panel */ 888 desc = panel->desc; 889 } else if (desc->bpc != 6 && desc->bpc != 8 && desc->bpc != 10) { 890 dev_warn(dev, "Expected bpc in {6,8,10} but got: %u\n", desc->bpc); 891 } 892 893 if (!panel->base.backlight && panel->aux) { 894 pm_runtime_get_sync(dev); 895 err = drm_panel_dp_aux_backlight(&panel->base, panel->aux); 896 pm_runtime_mark_last_busy(dev); 897 pm_runtime_put_autosuspend(dev); 898 if (err) 899 goto err_finished_pm_runtime; 900 } 901 902 drm_panel_add(&panel->base); 903 904 return 0; 905 906 err_finished_pm_runtime: 907 pm_runtime_dont_use_autosuspend(dev); 908 pm_runtime_disable(dev); 909 err_finished_ddc_init: 910 if (panel->ddc && (!panel->aux || panel->ddc != &panel->aux->ddc)) 911 put_device(&panel->ddc->dev); 912 913 return err; 914 } 915 916 static int panel_edp_remove(struct device *dev) 917 { 918 struct panel_edp *panel = dev_get_drvdata(dev); 919 920 drm_panel_remove(&panel->base); 921 drm_panel_disable(&panel->base); 922 drm_panel_unprepare(&panel->base); 923 924 pm_runtime_dont_use_autosuspend(dev); 925 pm_runtime_disable(dev); 926 if (panel->ddc && (!panel->aux || panel->ddc != &panel->aux->ddc)) 927 put_device(&panel->ddc->dev); 928 929 kfree(panel->edid); 930 panel->edid = NULL; 931 932 return 0; 933 } 934 935 static void panel_edp_shutdown(struct device *dev) 936 { 937 struct panel_edp *panel = dev_get_drvdata(dev); 938 939 drm_panel_disable(&panel->base); 940 drm_panel_unprepare(&panel->base); 941 } 942 943 static const struct display_timing auo_b101ean01_timing = { 944 .pixelclock = { 65300000, 72500000, 75000000 }, 945 .hactive = { 1280, 1280, 1280 }, 946 .hfront_porch = { 18, 119, 119 }, 947 .hback_porch = { 21, 21, 21 }, 948 .hsync_len = { 32, 32, 32 }, 949 .vactive = { 800, 800, 800 }, 950 .vfront_porch = { 4, 4, 4 }, 951 .vback_porch = { 8, 8, 8 }, 952 .vsync_len = { 18, 20, 20 }, 953 }; 954 955 static const struct panel_desc auo_b101ean01 = { 956 .timings = &auo_b101ean01_timing, 957 .num_timings = 1, 958 .bpc = 6, 959 .size = { 960 .width = 217, 961 .height = 136, 962 }, 963 }; 964 965 static const struct drm_display_mode auo_b116xak01_mode = { 966 .clock = 69300, 967 .hdisplay = 1366, 968 .hsync_start = 1366 + 48, 969 .hsync_end = 1366 + 48 + 32, 970 .htotal = 1366 + 48 + 32 + 10, 971 .vdisplay = 768, 972 .vsync_start = 768 + 4, 973 .vsync_end = 768 + 4 + 6, 974 .vtotal = 768 + 4 + 6 + 15, 975 .flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC, 976 }; 977 978 static const struct panel_desc auo_b116xak01 = { 979 .modes = &auo_b116xak01_mode, 980 .num_modes = 1, 981 .bpc = 6, 982 .size = { 983 .width = 256, 984 .height = 144, 985 }, 986 .delay = { 987 .hpd_absent = 200, 988 }, 989 }; 990 991 static const struct drm_display_mode auo_b116xw03_mode = { 992 .clock = 70589, 993 .hdisplay = 1366, 994 .hsync_start = 1366 + 40, 995 .hsync_end = 1366 + 40 + 40, 996 .htotal = 1366 + 40 + 40 + 32, 997 .vdisplay = 768, 998 .vsync_start = 768 + 10, 999 .vsync_end = 768 + 10 + 12, 1000 .vtotal = 768 + 10 + 12 + 6, 1001 .flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC, 1002 }; 1003 1004 static const struct panel_desc auo_b116xw03 = { 1005 .modes = &auo_b116xw03_mode, 1006 .num_modes = 1, 1007 .bpc = 6, 1008 .size = { 1009 .width = 256, 1010 .height = 144, 1011 }, 1012 .delay = { 1013 .enable = 400, 1014 }, 1015 }; 1016 1017 static const struct drm_display_mode auo_b133han05_mode = { 1018 .clock = 142600, 1019 .hdisplay = 1920, 1020 .hsync_start = 1920 + 58, 1021 .hsync_end = 1920 + 58 + 42, 1022 .htotal = 1920 + 58 + 42 + 60, 1023 .vdisplay = 1080, 1024 .vsync_start = 1080 + 3, 1025 .vsync_end = 1080 + 3 + 5, 1026 .vtotal = 1080 + 3 + 5 + 54, 1027 }; 1028 1029 static const struct panel_desc auo_b133han05 = { 1030 .modes = &auo_b133han05_mode, 1031 .num_modes = 1, 1032 .bpc = 8, 1033 .size = { 1034 .width = 293, 1035 .height = 165, 1036 }, 1037 .delay = { 1038 .hpd_reliable = 100, 1039 .enable = 20, 1040 .unprepare = 50, 1041 }, 1042 }; 1043 1044 static const struct drm_display_mode auo_b133htn01_mode = { 1045 .clock = 150660, 1046 .hdisplay = 1920, 1047 .hsync_start = 1920 + 172, 1048 .hsync_end = 1920 + 172 + 80, 1049 .htotal = 1920 + 172 + 80 + 60, 1050 .vdisplay = 1080, 1051 .vsync_start = 1080 + 25, 1052 .vsync_end = 1080 + 25 + 10, 1053 .vtotal = 1080 + 25 + 10 + 10, 1054 }; 1055 1056 static const struct panel_desc auo_b133htn01 = { 1057 .modes = &auo_b133htn01_mode, 1058 .num_modes = 1, 1059 .bpc = 6, 1060 .size = { 1061 .width = 293, 1062 .height = 165, 1063 }, 1064 .delay = { 1065 .hpd_reliable = 105, 1066 .enable = 20, 1067 .unprepare = 50, 1068 }, 1069 }; 1070 1071 static const struct drm_display_mode auo_b133xtn01_mode = { 1072 .clock = 69500, 1073 .hdisplay = 1366, 1074 .hsync_start = 1366 + 48, 1075 .hsync_end = 1366 + 48 + 32, 1076 .htotal = 1366 + 48 + 32 + 20, 1077 .vdisplay = 768, 1078 .vsync_start = 768 + 3, 1079 .vsync_end = 768 + 3 + 6, 1080 .vtotal = 768 + 3 + 6 + 13, 1081 }; 1082 1083 static const struct panel_desc auo_b133xtn01 = { 1084 .modes = &auo_b133xtn01_mode, 1085 .num_modes = 1, 1086 .bpc = 6, 1087 .size = { 1088 .width = 293, 1089 .height = 165, 1090 }, 1091 }; 1092 1093 static const struct drm_display_mode auo_b140han06_mode = { 1094 .clock = 141000, 1095 .hdisplay = 1920, 1096 .hsync_start = 1920 + 16, 1097 .hsync_end = 1920 + 16 + 16, 1098 .htotal = 1920 + 16 + 16 + 152, 1099 .vdisplay = 1080, 1100 .vsync_start = 1080 + 3, 1101 .vsync_end = 1080 + 3 + 14, 1102 .vtotal = 1080 + 3 + 14 + 19, 1103 }; 1104 1105 static const struct panel_desc auo_b140han06 = { 1106 .modes = &auo_b140han06_mode, 1107 .num_modes = 1, 1108 .bpc = 8, 1109 .size = { 1110 .width = 309, 1111 .height = 174, 1112 }, 1113 .delay = { 1114 .hpd_reliable = 100, 1115 .enable = 20, 1116 .unprepare = 50, 1117 }, 1118 }; 1119 1120 static const struct drm_display_mode boe_nv101wxmn51_modes[] = { 1121 { 1122 .clock = 71900, 1123 .hdisplay = 1280, 1124 .hsync_start = 1280 + 48, 1125 .hsync_end = 1280 + 48 + 32, 1126 .htotal = 1280 + 48 + 32 + 80, 1127 .vdisplay = 800, 1128 .vsync_start = 800 + 3, 1129 .vsync_end = 800 + 3 + 5, 1130 .vtotal = 800 + 3 + 5 + 24, 1131 }, 1132 { 1133 .clock = 57500, 1134 .hdisplay = 1280, 1135 .hsync_start = 1280 + 48, 1136 .hsync_end = 1280 + 48 + 32, 1137 .htotal = 1280 + 48 + 32 + 80, 1138 .vdisplay = 800, 1139 .vsync_start = 800 + 3, 1140 .vsync_end = 800 + 3 + 5, 1141 .vtotal = 800 + 3 + 5 + 24, 1142 }, 1143 }; 1144 1145 static const struct panel_desc boe_nv101wxmn51 = { 1146 .modes = boe_nv101wxmn51_modes, 1147 .num_modes = ARRAY_SIZE(boe_nv101wxmn51_modes), 1148 .bpc = 8, 1149 .size = { 1150 .width = 217, 1151 .height = 136, 1152 }, 1153 .delay = { 1154 /* TODO: should be hpd-absent and no-hpd should be set? */ 1155 .hpd_reliable = 210, 1156 .enable = 50, 1157 .unprepare = 160, 1158 }, 1159 }; 1160 1161 static const struct drm_display_mode boe_nv110wtm_n61_modes[] = { 1162 { 1163 .clock = 207800, 1164 .hdisplay = 2160, 1165 .hsync_start = 2160 + 48, 1166 .hsync_end = 2160 + 48 + 32, 1167 .htotal = 2160 + 48 + 32 + 100, 1168 .vdisplay = 1440, 1169 .vsync_start = 1440 + 3, 1170 .vsync_end = 1440 + 3 + 6, 1171 .vtotal = 1440 + 3 + 6 + 31, 1172 .flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC, 1173 }, 1174 { 1175 .clock = 138500, 1176 .hdisplay = 2160, 1177 .hsync_start = 2160 + 48, 1178 .hsync_end = 2160 + 48 + 32, 1179 .htotal = 2160 + 48 + 32 + 100, 1180 .vdisplay = 1440, 1181 .vsync_start = 1440 + 3, 1182 .vsync_end = 1440 + 3 + 6, 1183 .vtotal = 1440 + 3 + 6 + 31, 1184 .flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC, 1185 }, 1186 }; 1187 1188 static const struct panel_desc boe_nv110wtm_n61 = { 1189 .modes = boe_nv110wtm_n61_modes, 1190 .num_modes = ARRAY_SIZE(boe_nv110wtm_n61_modes), 1191 .bpc = 8, 1192 .size = { 1193 .width = 233, 1194 .height = 155, 1195 }, 1196 .delay = { 1197 .hpd_absent = 200, 1198 .prepare_to_enable = 80, 1199 .enable = 50, 1200 .unprepare = 500, 1201 }, 1202 }; 1203 1204 /* Also used for boe_nv133fhm_n62 */ 1205 static const struct drm_display_mode boe_nv133fhm_n61_modes = { 1206 .clock = 147840, 1207 .hdisplay = 1920, 1208 .hsync_start = 1920 + 48, 1209 .hsync_end = 1920 + 48 + 32, 1210 .htotal = 1920 + 48 + 32 + 200, 1211 .vdisplay = 1080, 1212 .vsync_start = 1080 + 3, 1213 .vsync_end = 1080 + 3 + 6, 1214 .vtotal = 1080 + 3 + 6 + 31, 1215 .flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC, 1216 }; 1217 1218 /* Also used for boe_nv133fhm_n62 */ 1219 static const struct panel_desc boe_nv133fhm_n61 = { 1220 .modes = &boe_nv133fhm_n61_modes, 1221 .num_modes = 1, 1222 .bpc = 6, 1223 .size = { 1224 .width = 294, 1225 .height = 165, 1226 }, 1227 .delay = { 1228 /* 1229 * When power is first given to the panel there's a short 1230 * spike on the HPD line. It was explained that this spike 1231 * was until the TCON data download was complete. On 1232 * one system this was measured at 8 ms. We'll put 15 ms 1233 * in the prepare delay just to be safe. That means: 1234 * - If HPD isn't hooked up you still have 200 ms delay. 1235 * - If HPD is hooked up we won't try to look at it for the 1236 * first 15 ms. 1237 */ 1238 .hpd_reliable = 15, 1239 .hpd_absent = 200, 1240 1241 .unprepare = 500, 1242 }, 1243 }; 1244 1245 static const struct drm_display_mode boe_nv140fhmn49_modes[] = { 1246 { 1247 .clock = 148500, 1248 .hdisplay = 1920, 1249 .hsync_start = 1920 + 48, 1250 .hsync_end = 1920 + 48 + 32, 1251 .htotal = 2200, 1252 .vdisplay = 1080, 1253 .vsync_start = 1080 + 3, 1254 .vsync_end = 1080 + 3 + 5, 1255 .vtotal = 1125, 1256 }, 1257 }; 1258 1259 static const struct panel_desc boe_nv140fhmn49 = { 1260 .modes = boe_nv140fhmn49_modes, 1261 .num_modes = ARRAY_SIZE(boe_nv140fhmn49_modes), 1262 .bpc = 6, 1263 .size = { 1264 .width = 309, 1265 .height = 174, 1266 }, 1267 .delay = { 1268 /* TODO: should be hpd-absent and no-hpd should be set? */ 1269 .hpd_reliable = 210, 1270 .enable = 50, 1271 .unprepare = 160, 1272 }, 1273 }; 1274 1275 static const struct drm_display_mode innolux_n116bca_ea1_mode = { 1276 .clock = 76420, 1277 .hdisplay = 1366, 1278 .hsync_start = 1366 + 136, 1279 .hsync_end = 1366 + 136 + 30, 1280 .htotal = 1366 + 136 + 30 + 60, 1281 .vdisplay = 768, 1282 .vsync_start = 768 + 8, 1283 .vsync_end = 768 + 8 + 12, 1284 .vtotal = 768 + 8 + 12 + 12, 1285 .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC, 1286 }; 1287 1288 static const struct panel_desc innolux_n116bca_ea1 = { 1289 .modes = &innolux_n116bca_ea1_mode, 1290 .num_modes = 1, 1291 .bpc = 6, 1292 .size = { 1293 .width = 256, 1294 .height = 144, 1295 }, 1296 .delay = { 1297 .hpd_absent = 200, 1298 .prepare_to_enable = 80, 1299 .unprepare = 500, 1300 }, 1301 }; 1302 1303 /* 1304 * Datasheet specifies that at 60 Hz refresh rate: 1305 * - total horizontal time: { 1506, 1592, 1716 } 1306 * - total vertical time: { 788, 800, 868 } 1307 * 1308 * ...but doesn't go into exactly how that should be split into a front 1309 * porch, back porch, or sync length. For now we'll leave a single setting 1310 * here which allows a bit of tweaking of the pixel clock at the expense of 1311 * refresh rate. 1312 */ 1313 static const struct display_timing innolux_n116bge_timing = { 1314 .pixelclock = { 72600000, 76420000, 80240000 }, 1315 .hactive = { 1366, 1366, 1366 }, 1316 .hfront_porch = { 136, 136, 136 }, 1317 .hback_porch = { 60, 60, 60 }, 1318 .hsync_len = { 30, 30, 30 }, 1319 .vactive = { 768, 768, 768 }, 1320 .vfront_porch = { 8, 8, 8 }, 1321 .vback_porch = { 12, 12, 12 }, 1322 .vsync_len = { 12, 12, 12 }, 1323 .flags = DISPLAY_FLAGS_VSYNC_LOW | DISPLAY_FLAGS_HSYNC_LOW, 1324 }; 1325 1326 static const struct panel_desc innolux_n116bge = { 1327 .timings = &innolux_n116bge_timing, 1328 .num_timings = 1, 1329 .bpc = 6, 1330 .size = { 1331 .width = 256, 1332 .height = 144, 1333 }, 1334 }; 1335 1336 static const struct drm_display_mode innolux_n125hce_gn1_mode = { 1337 .clock = 162000, 1338 .hdisplay = 1920, 1339 .hsync_start = 1920 + 40, 1340 .hsync_end = 1920 + 40 + 40, 1341 .htotal = 1920 + 40 + 40 + 80, 1342 .vdisplay = 1080, 1343 .vsync_start = 1080 + 4, 1344 .vsync_end = 1080 + 4 + 4, 1345 .vtotal = 1080 + 4 + 4 + 24, 1346 }; 1347 1348 static const struct panel_desc innolux_n125hce_gn1 = { 1349 .modes = &innolux_n125hce_gn1_mode, 1350 .num_modes = 1, 1351 .bpc = 8, 1352 .size = { 1353 .width = 276, 1354 .height = 155, 1355 }, 1356 }; 1357 1358 static const struct drm_display_mode innolux_p120zdg_bf1_mode = { 1359 .clock = 206016, 1360 .hdisplay = 2160, 1361 .hsync_start = 2160 + 48, 1362 .hsync_end = 2160 + 48 + 32, 1363 .htotal = 2160 + 48 + 32 + 80, 1364 .vdisplay = 1440, 1365 .vsync_start = 1440 + 3, 1366 .vsync_end = 1440 + 3 + 10, 1367 .vtotal = 1440 + 3 + 10 + 27, 1368 .flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC, 1369 }; 1370 1371 static const struct panel_desc innolux_p120zdg_bf1 = { 1372 .modes = &innolux_p120zdg_bf1_mode, 1373 .num_modes = 1, 1374 .bpc = 8, 1375 .size = { 1376 .width = 254, 1377 .height = 169, 1378 }, 1379 .delay = { 1380 .hpd_absent = 200, 1381 .unprepare = 500, 1382 }, 1383 }; 1384 1385 static const struct drm_display_mode ivo_m133nwf4_r0_mode = { 1386 .clock = 138778, 1387 .hdisplay = 1920, 1388 .hsync_start = 1920 + 24, 1389 .hsync_end = 1920 + 24 + 48, 1390 .htotal = 1920 + 24 + 48 + 88, 1391 .vdisplay = 1080, 1392 .vsync_start = 1080 + 3, 1393 .vsync_end = 1080 + 3 + 12, 1394 .vtotal = 1080 + 3 + 12 + 17, 1395 .flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC, 1396 }; 1397 1398 static const struct panel_desc ivo_m133nwf4_r0 = { 1399 .modes = &ivo_m133nwf4_r0_mode, 1400 .num_modes = 1, 1401 .bpc = 8, 1402 .size = { 1403 .width = 294, 1404 .height = 165, 1405 }, 1406 .delay = { 1407 .hpd_absent = 200, 1408 .unprepare = 500, 1409 }, 1410 }; 1411 1412 static const struct drm_display_mode kingdisplay_kd116n21_30nv_a010_mode = { 1413 .clock = 81000, 1414 .hdisplay = 1366, 1415 .hsync_start = 1366 + 40, 1416 .hsync_end = 1366 + 40 + 32, 1417 .htotal = 1366 + 40 + 32 + 62, 1418 .vdisplay = 768, 1419 .vsync_start = 768 + 5, 1420 .vsync_end = 768 + 5 + 5, 1421 .vtotal = 768 + 5 + 5 + 122, 1422 .flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC, 1423 }; 1424 1425 static const struct panel_desc kingdisplay_kd116n21_30nv_a010 = { 1426 .modes = &kingdisplay_kd116n21_30nv_a010_mode, 1427 .num_modes = 1, 1428 .bpc = 6, 1429 .size = { 1430 .width = 256, 1431 .height = 144, 1432 }, 1433 .delay = { 1434 .hpd_absent = 200, 1435 }, 1436 }; 1437 1438 static const struct drm_display_mode lg_lp079qx1_sp0v_mode = { 1439 .clock = 200000, 1440 .hdisplay = 1536, 1441 .hsync_start = 1536 + 12, 1442 .hsync_end = 1536 + 12 + 16, 1443 .htotal = 1536 + 12 + 16 + 48, 1444 .vdisplay = 2048, 1445 .vsync_start = 2048 + 8, 1446 .vsync_end = 2048 + 8 + 4, 1447 .vtotal = 2048 + 8 + 4 + 8, 1448 .flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC, 1449 }; 1450 1451 static const struct panel_desc lg_lp079qx1_sp0v = { 1452 .modes = &lg_lp079qx1_sp0v_mode, 1453 .num_modes = 1, 1454 .size = { 1455 .width = 129, 1456 .height = 171, 1457 }, 1458 }; 1459 1460 static const struct drm_display_mode lg_lp097qx1_spa1_mode = { 1461 .clock = 205210, 1462 .hdisplay = 2048, 1463 .hsync_start = 2048 + 150, 1464 .hsync_end = 2048 + 150 + 5, 1465 .htotal = 2048 + 150 + 5 + 5, 1466 .vdisplay = 1536, 1467 .vsync_start = 1536 + 3, 1468 .vsync_end = 1536 + 3 + 1, 1469 .vtotal = 1536 + 3 + 1 + 9, 1470 }; 1471 1472 static const struct panel_desc lg_lp097qx1_spa1 = { 1473 .modes = &lg_lp097qx1_spa1_mode, 1474 .num_modes = 1, 1475 .size = { 1476 .width = 208, 1477 .height = 147, 1478 }, 1479 }; 1480 1481 static const struct drm_display_mode lg_lp120up1_mode = { 1482 .clock = 162300, 1483 .hdisplay = 1920, 1484 .hsync_start = 1920 + 40, 1485 .hsync_end = 1920 + 40 + 40, 1486 .htotal = 1920 + 40 + 40 + 80, 1487 .vdisplay = 1280, 1488 .vsync_start = 1280 + 4, 1489 .vsync_end = 1280 + 4 + 4, 1490 .vtotal = 1280 + 4 + 4 + 12, 1491 }; 1492 1493 static const struct panel_desc lg_lp120up1 = { 1494 .modes = &lg_lp120up1_mode, 1495 .num_modes = 1, 1496 .bpc = 8, 1497 .size = { 1498 .width = 267, 1499 .height = 183, 1500 }, 1501 }; 1502 1503 static const struct drm_display_mode lg_lp129qe_mode = { 1504 .clock = 285250, 1505 .hdisplay = 2560, 1506 .hsync_start = 2560 + 48, 1507 .hsync_end = 2560 + 48 + 32, 1508 .htotal = 2560 + 48 + 32 + 80, 1509 .vdisplay = 1700, 1510 .vsync_start = 1700 + 3, 1511 .vsync_end = 1700 + 3 + 10, 1512 .vtotal = 1700 + 3 + 10 + 36, 1513 }; 1514 1515 static const struct panel_desc lg_lp129qe = { 1516 .modes = &lg_lp129qe_mode, 1517 .num_modes = 1, 1518 .bpc = 8, 1519 .size = { 1520 .width = 272, 1521 .height = 181, 1522 }, 1523 }; 1524 1525 static const struct drm_display_mode neweast_wjfh116008a_modes[] = { 1526 { 1527 .clock = 138500, 1528 .hdisplay = 1920, 1529 .hsync_start = 1920 + 48, 1530 .hsync_end = 1920 + 48 + 32, 1531 .htotal = 1920 + 48 + 32 + 80, 1532 .vdisplay = 1080, 1533 .vsync_start = 1080 + 3, 1534 .vsync_end = 1080 + 3 + 5, 1535 .vtotal = 1080 + 3 + 5 + 23, 1536 .flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC, 1537 }, { 1538 .clock = 110920, 1539 .hdisplay = 1920, 1540 .hsync_start = 1920 + 48, 1541 .hsync_end = 1920 + 48 + 32, 1542 .htotal = 1920 + 48 + 32 + 80, 1543 .vdisplay = 1080, 1544 .vsync_start = 1080 + 3, 1545 .vsync_end = 1080 + 3 + 5, 1546 .vtotal = 1080 + 3 + 5 + 23, 1547 .flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC, 1548 } 1549 }; 1550 1551 static const struct panel_desc neweast_wjfh116008a = { 1552 .modes = neweast_wjfh116008a_modes, 1553 .num_modes = 2, 1554 .bpc = 6, 1555 .size = { 1556 .width = 260, 1557 .height = 150, 1558 }, 1559 .delay = { 1560 .hpd_reliable = 110, 1561 .enable = 20, 1562 .unprepare = 500, 1563 }, 1564 }; 1565 1566 static const struct drm_display_mode samsung_lsn122dl01_c01_mode = { 1567 .clock = 271560, 1568 .hdisplay = 2560, 1569 .hsync_start = 2560 + 48, 1570 .hsync_end = 2560 + 48 + 32, 1571 .htotal = 2560 + 48 + 32 + 80, 1572 .vdisplay = 1600, 1573 .vsync_start = 1600 + 2, 1574 .vsync_end = 1600 + 2 + 5, 1575 .vtotal = 1600 + 2 + 5 + 57, 1576 }; 1577 1578 static const struct panel_desc samsung_lsn122dl01_c01 = { 1579 .modes = &samsung_lsn122dl01_c01_mode, 1580 .num_modes = 1, 1581 .size = { 1582 .width = 263, 1583 .height = 164, 1584 }, 1585 }; 1586 1587 static const struct drm_display_mode samsung_ltn140at29_301_mode = { 1588 .clock = 76300, 1589 .hdisplay = 1366, 1590 .hsync_start = 1366 + 64, 1591 .hsync_end = 1366 + 64 + 48, 1592 .htotal = 1366 + 64 + 48 + 128, 1593 .vdisplay = 768, 1594 .vsync_start = 768 + 2, 1595 .vsync_end = 768 + 2 + 5, 1596 .vtotal = 768 + 2 + 5 + 17, 1597 }; 1598 1599 static const struct panel_desc samsung_ltn140at29_301 = { 1600 .modes = &samsung_ltn140at29_301_mode, 1601 .num_modes = 1, 1602 .bpc = 6, 1603 .size = { 1604 .width = 320, 1605 .height = 187, 1606 }, 1607 }; 1608 1609 static const struct drm_display_mode sharp_ld_d5116z01b_mode = { 1610 .clock = 168480, 1611 .hdisplay = 1920, 1612 .hsync_start = 1920 + 48, 1613 .hsync_end = 1920 + 48 + 32, 1614 .htotal = 1920 + 48 + 32 + 80, 1615 .vdisplay = 1280, 1616 .vsync_start = 1280 + 3, 1617 .vsync_end = 1280 + 3 + 10, 1618 .vtotal = 1280 + 3 + 10 + 57, 1619 .flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC, 1620 }; 1621 1622 static const struct panel_desc sharp_ld_d5116z01b = { 1623 .modes = &sharp_ld_d5116z01b_mode, 1624 .num_modes = 1, 1625 .bpc = 8, 1626 .size = { 1627 .width = 260, 1628 .height = 120, 1629 }, 1630 }; 1631 1632 static const struct display_timing sharp_lq123p1jx31_timing = { 1633 .pixelclock = { 252750000, 252750000, 266604720 }, 1634 .hactive = { 2400, 2400, 2400 }, 1635 .hfront_porch = { 48, 48, 48 }, 1636 .hback_porch = { 80, 80, 84 }, 1637 .hsync_len = { 32, 32, 32 }, 1638 .vactive = { 1600, 1600, 1600 }, 1639 .vfront_porch = { 3, 3, 3 }, 1640 .vback_porch = { 33, 33, 120 }, 1641 .vsync_len = { 10, 10, 10 }, 1642 .flags = DISPLAY_FLAGS_VSYNC_LOW | DISPLAY_FLAGS_HSYNC_LOW, 1643 }; 1644 1645 static const struct panel_desc sharp_lq123p1jx31 = { 1646 .timings = &sharp_lq123p1jx31_timing, 1647 .num_timings = 1, 1648 .bpc = 8, 1649 .size = { 1650 .width = 259, 1651 .height = 173, 1652 }, 1653 .delay = { 1654 .hpd_reliable = 110, 1655 .enable = 50, 1656 .unprepare = 550, 1657 }, 1658 }; 1659 1660 static const struct drm_display_mode sharp_lq140m1jw46_mode[] = { 1661 { 1662 .clock = 346500, 1663 .hdisplay = 1920, 1664 .hsync_start = 1920 + 48, 1665 .hsync_end = 1920 + 48 + 32, 1666 .htotal = 1920 + 48 + 32 + 80, 1667 .vdisplay = 1080, 1668 .vsync_start = 1080 + 3, 1669 .vsync_end = 1080 + 3 + 5, 1670 .vtotal = 1080 + 3 + 5 + 69, 1671 .flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC, 1672 }, { 1673 .clock = 144370, 1674 .hdisplay = 1920, 1675 .hsync_start = 1920 + 48, 1676 .hsync_end = 1920 + 48 + 32, 1677 .htotal = 1920 + 48 + 32 + 80, 1678 .vdisplay = 1080, 1679 .vsync_start = 1080 + 3, 1680 .vsync_end = 1080 + 3 + 5, 1681 .vtotal = 1080 + 3 + 5 + 69, 1682 .flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC, 1683 }, 1684 }; 1685 1686 static const struct panel_desc sharp_lq140m1jw46 = { 1687 .modes = sharp_lq140m1jw46_mode, 1688 .num_modes = ARRAY_SIZE(sharp_lq140m1jw46_mode), 1689 .bpc = 8, 1690 .size = { 1691 .width = 309, 1692 .height = 174, 1693 }, 1694 .delay = { 1695 .hpd_absent = 80, 1696 .enable = 50, 1697 .unprepare = 500, 1698 }, 1699 }; 1700 1701 static const struct drm_display_mode starry_kr122ea0sra_mode = { 1702 .clock = 147000, 1703 .hdisplay = 1920, 1704 .hsync_start = 1920 + 16, 1705 .hsync_end = 1920 + 16 + 16, 1706 .htotal = 1920 + 16 + 16 + 32, 1707 .vdisplay = 1200, 1708 .vsync_start = 1200 + 15, 1709 .vsync_end = 1200 + 15 + 2, 1710 .vtotal = 1200 + 15 + 2 + 18, 1711 .flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC, 1712 }; 1713 1714 static const struct panel_desc starry_kr122ea0sra = { 1715 .modes = &starry_kr122ea0sra_mode, 1716 .num_modes = 1, 1717 .size = { 1718 .width = 263, 1719 .height = 164, 1720 }, 1721 .delay = { 1722 /* TODO: should be hpd-absent and no-hpd should be set? */ 1723 .hpd_reliable = 10 + 200, 1724 .enable = 50, 1725 .unprepare = 10 + 500, 1726 }, 1727 }; 1728 1729 static const struct of_device_id platform_of_match[] = { 1730 { 1731 /* Must be first */ 1732 .compatible = "edp-panel", 1733 }, { 1734 .compatible = "auo,b101ean01", 1735 .data = &auo_b101ean01, 1736 }, { 1737 .compatible = "auo,b116xa01", 1738 .data = &auo_b116xak01, 1739 }, { 1740 .compatible = "auo,b116xw03", 1741 .data = &auo_b116xw03, 1742 }, { 1743 .compatible = "auo,b133han05", 1744 .data = &auo_b133han05, 1745 }, { 1746 .compatible = "auo,b133htn01", 1747 .data = &auo_b133htn01, 1748 }, { 1749 .compatible = "auo,b133xtn01", 1750 .data = &auo_b133xtn01, 1751 }, { 1752 .compatible = "auo,b140han06", 1753 .data = &auo_b140han06, 1754 }, { 1755 .compatible = "boe,nv101wxmn51", 1756 .data = &boe_nv101wxmn51, 1757 }, { 1758 .compatible = "boe,nv110wtm-n61", 1759 .data = &boe_nv110wtm_n61, 1760 }, { 1761 .compatible = "boe,nv133fhm-n61", 1762 .data = &boe_nv133fhm_n61, 1763 }, { 1764 .compatible = "boe,nv133fhm-n62", 1765 .data = &boe_nv133fhm_n61, 1766 }, { 1767 .compatible = "boe,nv140fhmn49", 1768 .data = &boe_nv140fhmn49, 1769 }, { 1770 .compatible = "innolux,n116bca-ea1", 1771 .data = &innolux_n116bca_ea1, 1772 }, { 1773 .compatible = "innolux,n116bge", 1774 .data = &innolux_n116bge, 1775 }, { 1776 .compatible = "innolux,n125hce-gn1", 1777 .data = &innolux_n125hce_gn1, 1778 }, { 1779 .compatible = "innolux,p120zdg-bf1", 1780 .data = &innolux_p120zdg_bf1, 1781 }, { 1782 .compatible = "ivo,m133nwf4-r0", 1783 .data = &ivo_m133nwf4_r0, 1784 }, { 1785 .compatible = "kingdisplay,kd116n21-30nv-a010", 1786 .data = &kingdisplay_kd116n21_30nv_a010, 1787 }, { 1788 .compatible = "lg,lp079qx1-sp0v", 1789 .data = &lg_lp079qx1_sp0v, 1790 }, { 1791 .compatible = "lg,lp097qx1-spa1", 1792 .data = &lg_lp097qx1_spa1, 1793 }, { 1794 .compatible = "lg,lp120up1", 1795 .data = &lg_lp120up1, 1796 }, { 1797 .compatible = "lg,lp129qe", 1798 .data = &lg_lp129qe, 1799 }, { 1800 .compatible = "neweast,wjfh116008a", 1801 .data = &neweast_wjfh116008a, 1802 }, { 1803 .compatible = "samsung,lsn122dl01-c01", 1804 .data = &samsung_lsn122dl01_c01, 1805 }, { 1806 .compatible = "samsung,ltn140at29-301", 1807 .data = &samsung_ltn140at29_301, 1808 }, { 1809 .compatible = "sharp,ld-d5116z01b", 1810 .data = &sharp_ld_d5116z01b, 1811 }, { 1812 .compatible = "sharp,lq123p1jx31", 1813 .data = &sharp_lq123p1jx31, 1814 }, { 1815 .compatible = "sharp,lq140m1jw46", 1816 .data = &sharp_lq140m1jw46, 1817 }, { 1818 .compatible = "starry,kr122ea0sra", 1819 .data = &starry_kr122ea0sra, 1820 }, { 1821 /* sentinel */ 1822 } 1823 }; 1824 MODULE_DEVICE_TABLE(of, platform_of_match); 1825 1826 static const struct panel_delay delay_200_500_p2e80 = { 1827 .hpd_absent = 200, 1828 .unprepare = 500, 1829 .prepare_to_enable = 80, 1830 }; 1831 1832 static const struct panel_delay delay_200_500_p2e100 = { 1833 .hpd_absent = 200, 1834 .unprepare = 500, 1835 .prepare_to_enable = 100, 1836 }; 1837 1838 static const struct panel_delay delay_200_500_e50 = { 1839 .hpd_absent = 200, 1840 .unprepare = 500, 1841 .enable = 50, 1842 }; 1843 1844 static const struct panel_delay delay_200_500_e80_d50 = { 1845 .hpd_absent = 200, 1846 .unprepare = 500, 1847 .enable = 80, 1848 .disable = 50, 1849 }; 1850 1851 static const struct panel_delay delay_100_500_e200 = { 1852 .hpd_absent = 100, 1853 .unprepare = 500, 1854 .enable = 200, 1855 }; 1856 1857 #define EDP_PANEL_ENTRY(vend_chr_0, vend_chr_1, vend_chr_2, product_id, _delay, _name) \ 1858 { \ 1859 .name = _name, \ 1860 .panel_id = drm_edid_encode_panel_id(vend_chr_0, vend_chr_1, vend_chr_2, \ 1861 product_id), \ 1862 .delay = _delay \ 1863 } 1864 1865 /* 1866 * This table is used to figure out power sequencing delays for panels that 1867 * are detected by EDID. Entries here may point to entries in the 1868 * platform_of_match table (if a panel is listed in both places). 1869 * 1870 * Sort first by vendor, then by product ID. 1871 */ 1872 static const struct edp_panel_entry edp_panels[] = { 1873 EDP_PANEL_ENTRY('A', 'U', 'O', 0x405c, &auo_b116xak01.delay, "B116XAK01"), 1874 EDP_PANEL_ENTRY('A', 'U', 'O', 0x615c, &delay_200_500_e50, "B116XAN06.1"), 1875 EDP_PANEL_ENTRY('A', 'U', 'O', 0x8594, &delay_200_500_e50, "B133UAN01.0"), 1876 1877 EDP_PANEL_ENTRY('B', 'O', 'E', 0x0786, &delay_200_500_p2e80, "NV116WHM-T01"), 1878 EDP_PANEL_ENTRY('B', 'O', 'E', 0x07d1, &boe_nv133fhm_n61.delay, "NV133FHM-N61"), 1879 EDP_PANEL_ENTRY('B', 'O', 'E', 0x082d, &boe_nv133fhm_n61.delay, "NV133FHM-N62"), 1880 EDP_PANEL_ENTRY('B', 'O', 'E', 0x098d, &boe_nv110wtm_n61.delay, "NV110WTM-N61"), 1881 EDP_PANEL_ENTRY('B', 'O', 'E', 0x0a5d, &delay_200_500_e50, "NV116WHM-N45"), 1882 1883 EDP_PANEL_ENTRY('C', 'M', 'N', 0x114c, &innolux_n116bca_ea1.delay, "N116BCA-EA1"), 1884 1885 EDP_PANEL_ENTRY('K', 'D', 'B', 0x0624, &kingdisplay_kd116n21_30nv_a010.delay, "116N21-30NV-A010"), 1886 EDP_PANEL_ENTRY('K', 'D', 'B', 0x1120, &delay_200_500_e80_d50, "116N29-30NK-C007"), 1887 1888 EDP_PANEL_ENTRY('S', 'H', 'P', 0x1511, &delay_200_500_e50, "LQ140M1JW48"), 1889 EDP_PANEL_ENTRY('S', 'H', 'P', 0x1523, &sharp_lq140m1jw46.delay, "LQ140M1JW46"), 1890 EDP_PANEL_ENTRY('S', 'H', 'P', 0x154c, &delay_200_500_p2e100, "LQ116M1JW10"), 1891 1892 EDP_PANEL_ENTRY('S', 'T', 'A', 0x0100, &delay_100_500_e200, "2081116HHD028001-51D"), 1893 1894 { /* sentinal */ } 1895 }; 1896 1897 static const struct edp_panel_entry *find_edp_panel(u32 panel_id) 1898 { 1899 const struct edp_panel_entry *panel; 1900 1901 if (!panel_id) 1902 return NULL; 1903 1904 for (panel = edp_panels; panel->panel_id; panel++) 1905 if (panel->panel_id == panel_id) 1906 return panel; 1907 1908 return NULL; 1909 } 1910 1911 static int panel_edp_platform_probe(struct platform_device *pdev) 1912 { 1913 const struct of_device_id *id; 1914 1915 /* Skip one since "edp-panel" is only supported on DP AUX bus */ 1916 id = of_match_node(platform_of_match + 1, pdev->dev.of_node); 1917 if (!id) 1918 return -ENODEV; 1919 1920 return panel_edp_probe(&pdev->dev, id->data, NULL); 1921 } 1922 1923 static int panel_edp_platform_remove(struct platform_device *pdev) 1924 { 1925 return panel_edp_remove(&pdev->dev); 1926 } 1927 1928 static void panel_edp_platform_shutdown(struct platform_device *pdev) 1929 { 1930 panel_edp_shutdown(&pdev->dev); 1931 } 1932 1933 static const struct dev_pm_ops panel_edp_pm_ops = { 1934 SET_RUNTIME_PM_OPS(panel_edp_suspend, panel_edp_resume, NULL) 1935 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, 1936 pm_runtime_force_resume) 1937 }; 1938 1939 static struct platform_driver panel_edp_platform_driver = { 1940 .driver = { 1941 .name = "panel-edp", 1942 .of_match_table = platform_of_match, 1943 .pm = &panel_edp_pm_ops, 1944 }, 1945 .probe = panel_edp_platform_probe, 1946 .remove = panel_edp_platform_remove, 1947 .shutdown = panel_edp_platform_shutdown, 1948 }; 1949 1950 static int panel_edp_dp_aux_ep_probe(struct dp_aux_ep_device *aux_ep) 1951 { 1952 const struct of_device_id *id; 1953 1954 id = of_match_node(platform_of_match, aux_ep->dev.of_node); 1955 if (!id) 1956 return -ENODEV; 1957 1958 return panel_edp_probe(&aux_ep->dev, id->data, aux_ep->aux); 1959 } 1960 1961 static void panel_edp_dp_aux_ep_remove(struct dp_aux_ep_device *aux_ep) 1962 { 1963 panel_edp_remove(&aux_ep->dev); 1964 } 1965 1966 static void panel_edp_dp_aux_ep_shutdown(struct dp_aux_ep_device *aux_ep) 1967 { 1968 panel_edp_shutdown(&aux_ep->dev); 1969 } 1970 1971 static struct dp_aux_ep_driver panel_edp_dp_aux_ep_driver = { 1972 .driver = { 1973 .name = "panel-simple-dp-aux", 1974 .of_match_table = platform_of_match, /* Same as platform one! */ 1975 .pm = &panel_edp_pm_ops, 1976 }, 1977 .probe = panel_edp_dp_aux_ep_probe, 1978 .remove = panel_edp_dp_aux_ep_remove, 1979 .shutdown = panel_edp_dp_aux_ep_shutdown, 1980 }; 1981 1982 static int __init panel_edp_init(void) 1983 { 1984 int err; 1985 1986 err = platform_driver_register(&panel_edp_platform_driver); 1987 if (err < 0) 1988 return err; 1989 1990 err = dp_aux_dp_driver_register(&panel_edp_dp_aux_ep_driver); 1991 if (err < 0) 1992 goto err_did_platform_register; 1993 1994 return 0; 1995 1996 err_did_platform_register: 1997 platform_driver_unregister(&panel_edp_platform_driver); 1998 1999 return err; 2000 } 2001 module_init(panel_edp_init); 2002 2003 static void __exit panel_edp_exit(void) 2004 { 2005 dp_aux_dp_driver_unregister(&panel_edp_dp_aux_ep_driver); 2006 platform_driver_unregister(&panel_edp_platform_driver); 2007 } 2008 module_exit(panel_edp_exit); 2009 2010 MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>"); 2011 MODULE_DESCRIPTION("DRM Driver for Simple eDP Panels"); 2012 MODULE_LICENSE("GPL and additional rights"); 2013