drm_edid.c revision 249041
1/* 2 * Copyright (c) 2006 Luc Verhaegen (quirks list) 3 * Copyright (c) 2007-2008 Intel Corporation 4 * Jesse Barnes <jesse.barnes@intel.com> 5 * Copyright 2010 Red Hat, Inc. 6 * 7 * DDC probing routines (drm_ddc_read & drm_do_probe_ddc_edid) originally from 8 * FB layer. 9 * Copyright (C) 2006 Dennis Munsie <dmunsie@cecropia.com> 10 * 11 * Permission is hereby granted, free of charge, to any person obtaining a 12 * copy of this software and associated documentation files (the "Software"), 13 * to deal in the Software without restriction, including without limitation 14 * the rights to use, copy, modify, merge, publish, distribute, sub license, 15 * and/or sell copies of the Software, and to permit persons to whom the 16 * Software is furnished to do so, subject to the following conditions: 17 * 18 * The above copyright notice and this permission notice (including the 19 * next paragraph) shall be included in all copies or substantial portions 20 * of the Software. 21 * 22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 23 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 24 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 25 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 26 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 27 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 28 * DEALINGS IN THE SOFTWARE. 29 */ 30 31#include <sys/cdefs.h> 32__FBSDID("$FreeBSD: head/sys/dev/drm2/drm_edid.c 249041 2013-04-03 08:27:35Z dumbbell $"); 33 34#include <dev/drm2/drmP.h> 35#include <dev/drm2/drm_edid.h> 36#include <dev/drm2/drm_edid_modes.h> 37#include <dev/iicbus/iic.h> 38#include <dev/iicbus/iiconf.h> 39#include "iicbus_if.h" 40 41#define version_greater(edid, maj, min) \ 42 (((edid)->version > (maj)) || \ 43 ((edid)->version == (maj) && (edid)->revision > (min))) 44 45#define EDID_EST_TIMINGS 16 46#define EDID_STD_TIMINGS 8 47#define EDID_DETAILED_TIMINGS 4 48 49/* 50 * EDID blocks out in the wild have a variety of bugs, try to collect 51 * them here (note that userspace may work around broken monitors first, 52 * but fixes should make their way here so that the kernel "just works" 53 * on as many displays as possible). 54 */ 55 56/* First detailed mode wrong, use largest 60Hz mode */ 57#define EDID_QUIRK_PREFER_LARGE_60 (1 << 0) 58/* Reported 135MHz pixel clock is too high, needs adjustment */ 59#define EDID_QUIRK_135_CLOCK_TOO_HIGH (1 << 1) 60/* Prefer the largest mode at 75 Hz */ 61#define EDID_QUIRK_PREFER_LARGE_75 (1 << 2) 62/* Detail timing is in cm not mm */ 63#define EDID_QUIRK_DETAILED_IN_CM (1 << 3) 64/* Detailed timing descriptors have bogus size values, so just take the 65 * maximum size and use that. 66 */ 67#define EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE (1 << 4) 68/* Monitor forgot to set the first detailed is preferred bit. */ 69#define EDID_QUIRK_FIRST_DETAILED_PREFERRED (1 << 5) 70/* use +hsync +vsync for detailed mode */ 71#define EDID_QUIRK_DETAILED_SYNC_PP (1 << 6) 72 73struct detailed_mode_closure { 74 struct drm_connector *connector; 75 struct edid *edid; 76 bool preferred; 77 u32 quirks; 78 int modes; 79}; 80 81#define LEVEL_DMT 0 82#define LEVEL_GTF 1 83#define LEVEL_GTF2 2 84#define LEVEL_CVT 3 85 86static struct edid_quirk { 87 char *vendor; 88 int product_id; 89 u32 quirks; 90} edid_quirk_list[] = { 91 /* Acer AL1706 */ 92 { "ACR", 44358, EDID_QUIRK_PREFER_LARGE_60 }, 93 /* Acer F51 */ 94 { "API", 0x7602, EDID_QUIRK_PREFER_LARGE_60 }, 95 /* Unknown Acer */ 96 { "ACR", 2423, EDID_QUIRK_FIRST_DETAILED_PREFERRED }, 97 98 /* Belinea 10 15 55 */ 99 { "MAX", 1516, EDID_QUIRK_PREFER_LARGE_60 }, 100 { "MAX", 0x77e, EDID_QUIRK_PREFER_LARGE_60 }, 101 102 /* Envision Peripherals, Inc. EN-7100e */ 103 { "EPI", 59264, EDID_QUIRK_135_CLOCK_TOO_HIGH }, 104 /* Envision EN2028 */ 105 { "EPI", 8232, EDID_QUIRK_PREFER_LARGE_60 }, 106 107 /* Funai Electronics PM36B */ 108 { "FCM", 13600, EDID_QUIRK_PREFER_LARGE_75 | 109 EDID_QUIRK_DETAILED_IN_CM }, 110 111 /* LG Philips LCD LP154W01-A5 */ 112 { "LPL", 0, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE }, 113 { "LPL", 0x2a00, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE }, 114 115 /* Philips 107p5 CRT */ 116 { "PHL", 57364, EDID_QUIRK_FIRST_DETAILED_PREFERRED }, 117 118 /* Proview AY765C */ 119 { "PTS", 765, EDID_QUIRK_FIRST_DETAILED_PREFERRED }, 120 121 /* Samsung SyncMaster 205BW. Note: irony */ 122 { "SAM", 541, EDID_QUIRK_DETAILED_SYNC_PP }, 123 /* Samsung SyncMaster 22[5-6]BW */ 124 { "SAM", 596, EDID_QUIRK_PREFER_LARGE_60 }, 125 { "SAM", 638, EDID_QUIRK_PREFER_LARGE_60 }, 126}; 127 128/*** DDC fetch and block validation ***/ 129 130static const u8 edid_header[] = { 131 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 132}; 133 134 /* 135 * Sanity check the header of the base EDID block. Return 8 if the header 136 * is perfect, down to 0 if it's totally wrong. 137 */ 138int drm_edid_header_is_valid(const u8 *raw_edid) 139{ 140 int i, score = 0; 141 142 for (i = 0; i < sizeof(edid_header); i++) 143 if (raw_edid[i] == edid_header[i]) 144 score++; 145 146 return score; 147} 148 149/* 150 * Sanity check the EDID block (base or extension). Return 0 if the block 151 * doesn't check out, or 1 if it's valid. 152 */ 153static bool 154drm_edid_block_valid(u8 *raw_edid) 155{ 156 int i; 157 u8 csum = 0; 158 struct edid *edid = (struct edid *)raw_edid; 159 160 if (raw_edid[0] == 0x00) { 161 int score = drm_edid_header_is_valid(raw_edid); 162 if (score == 8) ; 163 else if (score >= 6) { 164 DRM_DEBUG("Fixing EDID header, your hardware may be failing\n"); 165 memcpy(raw_edid, edid_header, sizeof(edid_header)); 166 } else { 167 goto bad; 168 } 169 } 170 171 for (i = 0; i < EDID_LENGTH; i++) 172 csum += raw_edid[i]; 173 if (csum) { 174 DRM_ERROR("EDID checksum is invalid, remainder is %d\n", csum); 175 176 /* allow CEA to slide through, switches mangle this */ 177 if (raw_edid[0] != 0x02) 178 goto bad; 179 } 180 181 /* per-block-type checks */ 182 switch (raw_edid[0]) { 183 case 0: /* base */ 184 if (edid->version != 1) { 185 DRM_ERROR("EDID has major version %d, instead of 1\n", edid->version); 186 goto bad; 187 } 188 189 if (edid->revision > 4) 190 DRM_DEBUG("EDID minor > 4, assuming backward compatibility\n"); 191 break; 192 193 default: 194 break; 195 } 196 197 return 1; 198 199bad: 200 if (raw_edid) { 201 DRM_DEBUG_KMS("Raw EDID:\n"); 202 if ((drm_debug_flag & DRM_DEBUGBITS_KMS) != 0) { 203 for (i = 0; i < EDID_LENGTH; ) { 204 printf("%02x", raw_edid[i]); 205 i++; 206 if (i % 16 == 0 || i == EDID_LENGTH) 207 printf("\n"); 208 else if (i % 8 == 0) 209 printf(" "); 210 else 211 printf(" "); 212 } 213 } 214 } 215 return 0; 216} 217 218/** 219 * drm_edid_is_valid - sanity check EDID data 220 * @edid: EDID data 221 * 222 * Sanity-check an entire EDID record (including extensions) 223 */ 224bool drm_edid_is_valid(struct edid *edid) 225{ 226 int i; 227 u8 *raw = (u8 *)edid; 228 229 if (!edid) 230 return false; 231 232 for (i = 0; i <= edid->extensions; i++) 233 if (!drm_edid_block_valid(raw + i * EDID_LENGTH)) 234 return false; 235 236 return true; 237} 238 239#define DDC_ADDR 0x50 240#define DDC_SEGMENT_ADDR 0x30 241/** 242 * Get EDID information via I2C. 243 * 244 * \param adapter : i2c device adaptor 245 * \param buf : EDID data buffer to be filled 246 * \param len : EDID data buffer length 247 * \return 0 on success or -1 on failure. 248 * 249 * Try to fetch EDID information by calling i2c driver function. 250 */ 251static int 252drm_do_probe_ddc_edid(device_t adapter, unsigned char *buf, 253 int block, int len) 254{ 255 unsigned char start = block * EDID_LENGTH; 256 int ret, retries = 5; 257 258 /* The core i2c driver will automatically retry the transfer if the 259 * adapter reports EAGAIN. However, we find that bit-banging transfers 260 * are susceptible to errors under a heavily loaded machine and 261 * generate spurious NAKs and timeouts. Retrying the transfer 262 * of the individual block a few times seems to overcome this. 263 */ 264 do { 265 struct iic_msg msgs[] = { 266 { 267 .slave = DDC_ADDR << 1, 268 .flags = IIC_M_WR, 269 .len = 1, 270 .buf = &start, 271 }, { 272 .slave = DDC_ADDR << 1, 273 .flags = IIC_M_RD, 274 .len = len, 275 .buf = buf, 276 } 277 }; 278 ret = iicbus_transfer(adapter, msgs, 2); 279 if (ret != 0) 280 DRM_DEBUG_KMS("iicbus_transfer countdown %d error %d\n", 281 retries, ret); 282 } while (ret != 0 && --retries); 283 284 return (ret == 0 ? 0 : -1); 285} 286 287static bool drm_edid_is_zero(u8 *in_edid, int length) 288{ 289 int i; 290 u32 *raw_edid = (u32 *)in_edid; 291 292 for (i = 0; i < length / 4; i++) 293 if (*(raw_edid + i) != 0) 294 return false; 295 return true; 296} 297 298static u8 * 299drm_do_get_edid(struct drm_connector *connector, device_t adapter) 300{ 301 int i, j = 0, valid_extensions = 0; 302 u8 *block, *new; 303 304 block = malloc(EDID_LENGTH, DRM_MEM_KMS, M_WAITOK | M_ZERO); 305 306 /* base block fetch */ 307 for (i = 0; i < 4; i++) { 308 if (drm_do_probe_ddc_edid(adapter, block, 0, EDID_LENGTH)) 309 goto out; 310 if (drm_edid_block_valid(block)) 311 break; 312 if (i == 0 && drm_edid_is_zero(block, EDID_LENGTH)) { 313 connector->null_edid_counter++; 314 goto carp; 315 } 316 } 317 if (i == 4) 318 goto carp; 319 320 /* if there's no extensions, we're done */ 321 if (block[0x7e] == 0) 322 return block; 323 324 new = reallocf(block, (block[0x7e] + 1) * EDID_LENGTH, DRM_MEM_KMS, 325 M_WAITOK); 326 block = new; 327 328 for (j = 1; j <= block[0x7e]; j++) { 329 for (i = 0; i < 4; i++) { 330 if (drm_do_probe_ddc_edid(adapter, 331 block + (valid_extensions + 1) * EDID_LENGTH, 332 j, EDID_LENGTH)) 333 goto out; 334 if (drm_edid_block_valid(block + (valid_extensions + 1) * EDID_LENGTH)) { 335 valid_extensions++; 336 break; 337 } 338 } 339 if (i == 4) 340 DRM_DEBUG_KMS("%s: Ignoring invalid EDID block %d.\n", 341 drm_get_connector_name(connector), j); 342 } 343 344 if (valid_extensions != block[0x7e]) { 345 block[EDID_LENGTH-1] += block[0x7e] - valid_extensions; 346 block[0x7e] = valid_extensions; 347 new = reallocf(block, (valid_extensions + 1) * EDID_LENGTH, 348 DRM_MEM_KMS, M_WAITOK); 349 block = new; 350 } 351 352 DRM_DEBUG_KMS("got EDID from %s\n", drm_get_connector_name(connector)); 353 return block; 354 355carp: 356 DRM_ERROR("%s: EDID block %d invalid.\n", 357 drm_get_connector_name(connector), j); 358 359out: 360 free(block, DRM_MEM_KMS); 361 return NULL; 362} 363 364/** 365 * Probe DDC presence. 366 * 367 * \param adapter : i2c device adaptor 368 * \return 1 on success 369 */ 370static bool 371drm_probe_ddc(device_t adapter) 372{ 373 unsigned char out; 374 375 return (drm_do_probe_ddc_edid(adapter, &out, 0, 1) == 0); 376} 377 378/** 379 * drm_get_edid - get EDID data, if available 380 * @connector: connector we're probing 381 * @adapter: i2c adapter to use for DDC 382 * 383 * Poke the given i2c channel to grab EDID data if possible. If found, 384 * attach it to the connector. 385 * 386 * Return edid data or NULL if we couldn't find any. 387 */ 388struct edid *drm_get_edid(struct drm_connector *connector, 389 device_t adapter) 390{ 391 struct edid *edid = NULL; 392 393 if (drm_probe_ddc(adapter)) 394 edid = (struct edid *)drm_do_get_edid(connector, adapter); 395 396 connector->display_info.raw_edid = (char *)edid; 397 398 return edid; 399 400} 401 402/*** EDID parsing ***/ 403 404/** 405 * edid_vendor - match a string against EDID's obfuscated vendor field 406 * @edid: EDID to match 407 * @vendor: vendor string 408 * 409 * Returns true if @vendor is in @edid, false otherwise 410 */ 411static bool edid_vendor(struct edid *edid, char *vendor) 412{ 413 char edid_vendor[3]; 414 415 edid_vendor[0] = ((edid->mfg_id[0] & 0x7c) >> 2) + '@'; 416 edid_vendor[1] = (((edid->mfg_id[0] & 0x3) << 3) | 417 ((edid->mfg_id[1] & 0xe0) >> 5)) + '@'; 418 edid_vendor[2] = (edid->mfg_id[1] & 0x1f) + '@'; 419 420 return !strncmp(edid_vendor, vendor, 3); 421} 422 423/** 424 * edid_get_quirks - return quirk flags for a given EDID 425 * @edid: EDID to process 426 * 427 * This tells subsequent routines what fixes they need to apply. 428 */ 429static u32 edid_get_quirks(struct edid *edid) 430{ 431 struct edid_quirk *quirk; 432 int i; 433 434 for (i = 0; i < DRM_ARRAY_SIZE(edid_quirk_list); i++) { 435 quirk = &edid_quirk_list[i]; 436 437 if (edid_vendor(edid, quirk->vendor) && 438 (EDID_PRODUCT_ID(edid) == quirk->product_id)) 439 return quirk->quirks; 440 } 441 442 return 0; 443} 444 445#define MODE_SIZE(m) ((m)->hdisplay * (m)->vdisplay) 446#define MODE_REFRESH_DIFF(m,r) (abs((m)->vrefresh - target_refresh)) 447 448/** 449 * edid_fixup_preferred - set preferred modes based on quirk list 450 * @connector: has mode list to fix up 451 * @quirks: quirks list 452 * 453 * Walk the mode list for @connector, clearing the preferred status 454 * on existing modes and setting it anew for the right mode ala @quirks. 455 */ 456static void edid_fixup_preferred(struct drm_connector *connector, 457 u32 quirks) 458{ 459 struct drm_display_mode *t, *cur_mode, *preferred_mode; 460 int target_refresh = 0; 461 462 if (list_empty(&connector->probed_modes)) 463 return; 464 465 if (quirks & EDID_QUIRK_PREFER_LARGE_60) 466 target_refresh = 60; 467 if (quirks & EDID_QUIRK_PREFER_LARGE_75) 468 target_refresh = 75; 469 470 preferred_mode = list_first_entry(&connector->probed_modes, 471 struct drm_display_mode, head); 472 473 list_for_each_entry_safe(cur_mode, t, &connector->probed_modes, head) { 474 cur_mode->type &= ~DRM_MODE_TYPE_PREFERRED; 475 476 if (cur_mode == preferred_mode) 477 continue; 478 479 /* Largest mode is preferred */ 480 if (MODE_SIZE(cur_mode) > MODE_SIZE(preferred_mode)) 481 preferred_mode = cur_mode; 482 483 /* At a given size, try to get closest to target refresh */ 484 if ((MODE_SIZE(cur_mode) == MODE_SIZE(preferred_mode)) && 485 MODE_REFRESH_DIFF(cur_mode, target_refresh) < 486 MODE_REFRESH_DIFF(preferred_mode, target_refresh)) { 487 preferred_mode = cur_mode; 488 } 489 } 490 491 preferred_mode->type |= DRM_MODE_TYPE_PREFERRED; 492} 493 494struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev, 495 int hsize, int vsize, int fresh) 496{ 497 struct drm_display_mode *mode = NULL; 498 int i; 499 500 for (i = 0; i < drm_num_dmt_modes; i++) { 501 struct drm_display_mode *ptr = &drm_dmt_modes[i]; 502 if (hsize == ptr->hdisplay && 503 vsize == ptr->vdisplay && 504 fresh == drm_mode_vrefresh(ptr)) { 505 /* get the expected default mode */ 506 mode = drm_mode_duplicate(dev, ptr); 507 break; 508 } 509 } 510 return mode; 511} 512 513typedef void detailed_cb(struct detailed_timing *timing, void *closure); 514 515static void 516cea_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure) 517{ 518 int i, n = 0; 519 u8 rev = ext[0x01], d = ext[0x02]; 520 u8 *det_base = ext + d; 521 522 switch (rev) { 523 case 0: 524 /* can't happen */ 525 return; 526 case 1: 527 /* have to infer how many blocks we have, check pixel clock */ 528 for (i = 0; i < 6; i++) 529 if (det_base[18*i] || det_base[18*i+1]) 530 n++; 531 break; 532 default: 533 /* explicit count */ 534 n = min(ext[0x03] & 0x0f, 6); 535 break; 536 } 537 538 for (i = 0; i < n; i++) 539 cb((struct detailed_timing *)(det_base + 18 * i), closure); 540} 541 542static void 543vtb_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure) 544{ 545 unsigned int i, n = min((int)ext[0x02], 6); 546 u8 *det_base = ext + 5; 547 548 if (ext[0x01] != 1) 549 return; /* unknown version */ 550 551 for (i = 0; i < n; i++) 552 cb((struct detailed_timing *)(det_base + 18 * i), closure); 553} 554 555static void 556drm_for_each_detailed_block(u8 *raw_edid, detailed_cb *cb, void *closure) 557{ 558 int i; 559 struct edid *edid = (struct edid *)raw_edid; 560 561 if (edid == NULL) 562 return; 563 564 for (i = 0; i < EDID_DETAILED_TIMINGS; i++) 565 cb(&(edid->detailed_timings[i]), closure); 566 567 for (i = 1; i <= raw_edid[0x7e]; i++) { 568 u8 *ext = raw_edid + (i * EDID_LENGTH); 569 switch (*ext) { 570 case CEA_EXT: 571 cea_for_each_detailed_block(ext, cb, closure); 572 break; 573 case VTB_EXT: 574 vtb_for_each_detailed_block(ext, cb, closure); 575 break; 576 default: 577 break; 578 } 579 } 580} 581 582static void 583is_rb(struct detailed_timing *t, void *data) 584{ 585 u8 *r = (u8 *)t; 586 if (r[3] == EDID_DETAIL_MONITOR_RANGE) 587 if (r[15] & 0x10) 588 *(bool *)data = true; 589} 590 591/* EDID 1.4 defines this explicitly. For EDID 1.3, we guess, badly. */ 592static bool 593drm_monitor_supports_rb(struct edid *edid) 594{ 595 if (edid->revision >= 4) { 596 bool ret; 597 drm_for_each_detailed_block((u8 *)edid, is_rb, &ret); 598 return ret; 599 } 600 601 return ((edid->input & DRM_EDID_INPUT_DIGITAL) != 0); 602} 603 604static void 605find_gtf2(struct detailed_timing *t, void *data) 606{ 607 u8 *r = (u8 *)t; 608 if (r[3] == EDID_DETAIL_MONITOR_RANGE && r[10] == 0x02) 609 *(u8 **)data = r; 610} 611 612/* Secondary GTF curve kicks in above some break frequency */ 613static int 614drm_gtf2_hbreak(struct edid *edid) 615{ 616 u8 *r = NULL; 617 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); 618 return r ? (r[12] * 2) : 0; 619} 620 621static int 622drm_gtf2_2c(struct edid *edid) 623{ 624 u8 *r = NULL; 625 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); 626 return r ? r[13] : 0; 627} 628 629static int 630drm_gtf2_m(struct edid *edid) 631{ 632 u8 *r = NULL; 633 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); 634 return r ? (r[15] << 8) + r[14] : 0; 635} 636 637static int 638drm_gtf2_k(struct edid *edid) 639{ 640 u8 *r = NULL; 641 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); 642 return r ? r[16] : 0; 643} 644 645static int 646drm_gtf2_2j(struct edid *edid) 647{ 648 u8 *r = NULL; 649 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); 650 return r ? r[17] : 0; 651} 652 653/** 654 * standard_timing_level - get std. timing level(CVT/GTF/DMT) 655 * @edid: EDID block to scan 656 */ 657static int standard_timing_level(struct edid *edid) 658{ 659 if (edid->revision >= 2) { 660 if (edid->revision >= 4 && (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF)) 661 return LEVEL_CVT; 662 if (drm_gtf2_hbreak(edid)) 663 return LEVEL_GTF2; 664 return LEVEL_GTF; 665 } 666 return LEVEL_DMT; 667} 668 669/* 670 * 0 is reserved. The spec says 0x01 fill for unused timings. Some old 671 * monitors fill with ascii space (0x20) instead. 672 */ 673static int 674bad_std_timing(u8 a, u8 b) 675{ 676 return (a == 0x00 && b == 0x00) || 677 (a == 0x01 && b == 0x01) || 678 (a == 0x20 && b == 0x20); 679} 680 681/** 682 * drm_mode_std - convert standard mode info (width, height, refresh) into mode 683 * @t: standard timing params 684 * @timing_level: standard timing level 685 * 686 * Take the standard timing params (in this case width, aspect, and refresh) 687 * and convert them into a real mode using CVT/GTF/DMT. 688 */ 689static struct drm_display_mode * 690drm_mode_std(struct drm_connector *connector, struct edid *edid, 691 struct std_timing *t, int revision) 692{ 693 struct drm_device *dev = connector->dev; 694 struct drm_display_mode *m, *mode = NULL; 695 int hsize, vsize; 696 int vrefresh_rate; 697 unsigned aspect_ratio = (t->vfreq_aspect & EDID_TIMING_ASPECT_MASK) 698 >> EDID_TIMING_ASPECT_SHIFT; 699 unsigned vfreq = (t->vfreq_aspect & EDID_TIMING_VFREQ_MASK) 700 >> EDID_TIMING_VFREQ_SHIFT; 701 int timing_level = standard_timing_level(edid); 702 703 if (bad_std_timing(t->hsize, t->vfreq_aspect)) 704 return NULL; 705 706 /* According to the EDID spec, the hdisplay = hsize * 8 + 248 */ 707 hsize = t->hsize * 8 + 248; 708 /* vrefresh_rate = vfreq + 60 */ 709 vrefresh_rate = vfreq + 60; 710 /* the vdisplay is calculated based on the aspect ratio */ 711 if (aspect_ratio == 0) { 712 if (revision < 3) 713 vsize = hsize; 714 else 715 vsize = (hsize * 10) / 16; 716 } else if (aspect_ratio == 1) 717 vsize = (hsize * 3) / 4; 718 else if (aspect_ratio == 2) 719 vsize = (hsize * 4) / 5; 720 else 721 vsize = (hsize * 9) / 16; 722 723 /* HDTV hack, part 1 */ 724 if (vrefresh_rate == 60 && 725 ((hsize == 1360 && vsize == 765) || 726 (hsize == 1368 && vsize == 769))) { 727 hsize = 1366; 728 vsize = 768; 729 } 730 731 /* 732 * If this connector already has a mode for this size and refresh 733 * rate (because it came from detailed or CVT info), use that 734 * instead. This way we don't have to guess at interlace or 735 * reduced blanking. 736 */ 737 list_for_each_entry(m, &connector->probed_modes, head) 738 if (m->hdisplay == hsize && m->vdisplay == vsize && 739 drm_mode_vrefresh(m) == vrefresh_rate) 740 return NULL; 741 742 /* HDTV hack, part 2 */ 743 if (hsize == 1366 && vsize == 768 && vrefresh_rate == 60) { 744 mode = drm_cvt_mode(dev, 1366, 768, vrefresh_rate, 0, 0, 745 false); 746 mode->hdisplay = 1366; 747 mode->hsync_start = mode->hsync_start - 1; 748 mode->hsync_end = mode->hsync_end - 1; 749 return mode; 750 } 751 752 /* check whether it can be found in default mode table */ 753 mode = drm_mode_find_dmt(dev, hsize, vsize, vrefresh_rate); 754 if (mode) 755 return mode; 756 757 switch (timing_level) { 758 case LEVEL_DMT: 759 break; 760 case LEVEL_GTF: 761 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0); 762 break; 763 case LEVEL_GTF2: 764 /* 765 * This is potentially wrong if there's ever a monitor with 766 * more than one ranges section, each claiming a different 767 * secondary GTF curve. Please don't do that. 768 */ 769 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0); 770 if (drm_mode_hsync(mode) > drm_gtf2_hbreak(edid)) { 771 free(mode, DRM_MEM_KMS); 772 mode = drm_gtf_mode_complex(dev, hsize, vsize, 773 vrefresh_rate, 0, 0, 774 drm_gtf2_m(edid), 775 drm_gtf2_2c(edid), 776 drm_gtf2_k(edid), 777 drm_gtf2_2j(edid)); 778 } 779 break; 780 case LEVEL_CVT: 781 mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0, 782 false); 783 break; 784 } 785 return mode; 786} 787 788/* 789 * EDID is delightfully ambiguous about how interlaced modes are to be 790 * encoded. Our internal representation is of frame height, but some 791 * HDTV detailed timings are encoded as field height. 792 * 793 * The format list here is from CEA, in frame size. Technically we 794 * should be checking refresh rate too. Whatever. 795 */ 796static void 797drm_mode_do_interlace_quirk(struct drm_display_mode *mode, 798 struct detailed_pixel_timing *pt) 799{ 800 int i; 801 static const struct { 802 int w, h; 803 } cea_interlaced[] = { 804 { 1920, 1080 }, 805 { 720, 480 }, 806 { 1440, 480 }, 807 { 2880, 480 }, 808 { 720, 576 }, 809 { 1440, 576 }, 810 { 2880, 576 }, 811 }; 812 813 if (!(pt->misc & DRM_EDID_PT_INTERLACED)) 814 return; 815 816 for (i = 0; i < DRM_ARRAY_SIZE(cea_interlaced); i++) { 817 if ((mode->hdisplay == cea_interlaced[i].w) && 818 (mode->vdisplay == cea_interlaced[i].h / 2)) { 819 mode->vdisplay *= 2; 820 mode->vsync_start *= 2; 821 mode->vsync_end *= 2; 822 mode->vtotal *= 2; 823 mode->vtotal |= 1; 824 } 825 } 826 827 mode->flags |= DRM_MODE_FLAG_INTERLACE; 828} 829 830/** 831 * drm_mode_detailed - create a new mode from an EDID detailed timing section 832 * @dev: DRM device (needed to create new mode) 833 * @edid: EDID block 834 * @timing: EDID detailed timing info 835 * @quirks: quirks to apply 836 * 837 * An EDID detailed timing block contains enough info for us to create and 838 * return a new struct drm_display_mode. 839 */ 840static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev, 841 struct edid *edid, 842 struct detailed_timing *timing, 843 u32 quirks) 844{ 845 struct drm_display_mode *mode; 846 struct detailed_pixel_timing *pt = &timing->data.pixel_data; 847 unsigned hactive = (pt->hactive_hblank_hi & 0xf0) << 4 | pt->hactive_lo; 848 unsigned vactive = (pt->vactive_vblank_hi & 0xf0) << 4 | pt->vactive_lo; 849 unsigned hblank = (pt->hactive_hblank_hi & 0xf) << 8 | pt->hblank_lo; 850 unsigned vblank = (pt->vactive_vblank_hi & 0xf) << 8 | pt->vblank_lo; 851 unsigned hsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc0) << 2 | pt->hsync_offset_lo; 852 unsigned hsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x30) << 4 | pt->hsync_pulse_width_lo; 853 unsigned vsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc) >> 2 | pt->vsync_offset_pulse_width_lo >> 4; 854 unsigned vsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x3) << 4 | (pt->vsync_offset_pulse_width_lo & 0xf); 855 856 /* ignore tiny modes */ 857 if (hactive < 64 || vactive < 64) 858 return NULL; 859 860 if (pt->misc & DRM_EDID_PT_STEREO) { 861 printf("stereo mode not supported\n"); 862 return NULL; 863 } 864 if (!(pt->misc & DRM_EDID_PT_SEPARATE_SYNC)) { 865 printf("composite sync not supported\n"); 866 } 867 868 /* it is incorrect if hsync/vsync width is zero */ 869 if (!hsync_pulse_width || !vsync_pulse_width) { 870 DRM_DEBUG_KMS("Incorrect Detailed timing. " 871 "Wrong Hsync/Vsync pulse width\n"); 872 return NULL; 873 } 874 mode = drm_mode_create(dev); 875 if (!mode) 876 return NULL; 877 878 mode->type = DRM_MODE_TYPE_DRIVER; 879 880 if (quirks & EDID_QUIRK_135_CLOCK_TOO_HIGH) 881 timing->pixel_clock = htole16(1088); 882 883 mode->clock = le16toh(timing->pixel_clock) * 10; 884 885 mode->hdisplay = hactive; 886 mode->hsync_start = mode->hdisplay + hsync_offset; 887 mode->hsync_end = mode->hsync_start + hsync_pulse_width; 888 mode->htotal = mode->hdisplay + hblank; 889 890 mode->vdisplay = vactive; 891 mode->vsync_start = mode->vdisplay + vsync_offset; 892 mode->vsync_end = mode->vsync_start + vsync_pulse_width; 893 mode->vtotal = mode->vdisplay + vblank; 894 895 /* Some EDIDs have bogus h/vtotal values */ 896 if (mode->hsync_end > mode->htotal) 897 mode->htotal = mode->hsync_end + 1; 898 if (mode->vsync_end > mode->vtotal) 899 mode->vtotal = mode->vsync_end + 1; 900 901 drm_mode_do_interlace_quirk(mode, pt); 902 903 drm_mode_set_name(mode); 904 905 if (quirks & EDID_QUIRK_DETAILED_SYNC_PP) { 906 pt->misc |= DRM_EDID_PT_HSYNC_POSITIVE | DRM_EDID_PT_VSYNC_POSITIVE; 907 } 908 909 mode->flags |= (pt->misc & DRM_EDID_PT_HSYNC_POSITIVE) ? 910 DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC; 911 mode->flags |= (pt->misc & DRM_EDID_PT_VSYNC_POSITIVE) ? 912 DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC; 913 914 mode->width_mm = pt->width_mm_lo | (pt->width_height_mm_hi & 0xf0) << 4; 915 mode->height_mm = pt->height_mm_lo | (pt->width_height_mm_hi & 0xf) << 8; 916 917 if (quirks & EDID_QUIRK_DETAILED_IN_CM) { 918 mode->width_mm *= 10; 919 mode->height_mm *= 10; 920 } 921 922 if (quirks & EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE) { 923 mode->width_mm = edid->width_cm * 10; 924 mode->height_mm = edid->height_cm * 10; 925 } 926 927 return mode; 928} 929 930static bool 931mode_is_rb(const struct drm_display_mode *mode) 932{ 933 return (mode->htotal - mode->hdisplay == 160) && 934 (mode->hsync_end - mode->hdisplay == 80) && 935 (mode->hsync_end - mode->hsync_start == 32) && 936 (mode->vsync_start - mode->vdisplay == 3); 937} 938 939static bool 940mode_in_hsync_range(struct drm_display_mode *mode, 941 struct edid *edid, u8 *t) 942{ 943 int hsync, hmin, hmax; 944 945 hmin = t[7]; 946 if (edid->revision >= 4) 947 hmin += ((t[4] & 0x04) ? 255 : 0); 948 hmax = t[8]; 949 if (edid->revision >= 4) 950 hmax += ((t[4] & 0x08) ? 255 : 0); 951 hsync = drm_mode_hsync(mode); 952 953 return (hsync <= hmax && hsync >= hmin); 954} 955 956static bool 957mode_in_vsync_range(struct drm_display_mode *mode, 958 struct edid *edid, u8 *t) 959{ 960 int vsync, vmin, vmax; 961 962 vmin = t[5]; 963 if (edid->revision >= 4) 964 vmin += ((t[4] & 0x01) ? 255 : 0); 965 vmax = t[6]; 966 if (edid->revision >= 4) 967 vmax += ((t[4] & 0x02) ? 255 : 0); 968 vsync = drm_mode_vrefresh(mode); 969 970 return (vsync <= vmax && vsync >= vmin); 971} 972 973static u32 974range_pixel_clock(struct edid *edid, u8 *t) 975{ 976 /* unspecified */ 977 if (t[9] == 0 || t[9] == 255) 978 return 0; 979 980 /* 1.4 with CVT support gives us real precision, yay */ 981 if (edid->revision >= 4 && t[10] == 0x04) 982 return (t[9] * 10000) - ((t[12] >> 2) * 250); 983 984 /* 1.3 is pathetic, so fuzz up a bit */ 985 return t[9] * 10000 + 5001; 986} 987 988static bool 989mode_in_range(struct drm_display_mode *mode, struct edid *edid, 990 struct detailed_timing *timing) 991{ 992 u32 max_clock; 993 u8 *t = (u8 *)timing; 994 995 if (!mode_in_hsync_range(mode, edid, t)) 996 return false; 997 998 if (!mode_in_vsync_range(mode, edid, t)) 999 return false; 1000 1001 if ((max_clock = range_pixel_clock(edid, t))) 1002 if (mode->clock > max_clock) 1003 return false; 1004 1005 /* 1.4 max horizontal check */ 1006 if (edid->revision >= 4 && t[10] == 0x04) 1007 if (t[13] && mode->hdisplay > 8 * (t[13] + (256 * (t[12]&0x3)))) 1008 return false; 1009 1010 if (mode_is_rb(mode) && !drm_monitor_supports_rb(edid)) 1011 return false; 1012 1013 return true; 1014} 1015 1016/* 1017 * XXX If drm_dmt_modes ever regrows the CVT-R modes (and it will) this will 1018 * need to account for them. 1019 */ 1020static int 1021drm_gtf_modes_for_range(struct drm_connector *connector, struct edid *edid, 1022 struct detailed_timing *timing) 1023{ 1024 int i, modes = 0; 1025 struct drm_display_mode *newmode; 1026 struct drm_device *dev = connector->dev; 1027 1028 for (i = 0; i < drm_num_dmt_modes; i++) { 1029 if (mode_in_range(drm_dmt_modes + i, edid, timing)) { 1030 newmode = drm_mode_duplicate(dev, &drm_dmt_modes[i]); 1031 if (newmode) { 1032 drm_mode_probed_add(connector, newmode); 1033 modes++; 1034 } 1035 } 1036 } 1037 1038 return modes; 1039} 1040 1041static void 1042do_inferred_modes(struct detailed_timing *timing, void *c) 1043{ 1044 struct detailed_mode_closure *closure = c; 1045 struct detailed_non_pixel *data = &timing->data.other_data; 1046 int gtf = (closure->edid->features & DRM_EDID_FEATURE_DEFAULT_GTF); 1047 1048 if (gtf && data->type == EDID_DETAIL_MONITOR_RANGE) 1049 closure->modes += drm_gtf_modes_for_range(closure->connector, 1050 closure->edid, 1051 timing); 1052} 1053 1054static int 1055add_inferred_modes(struct drm_connector *connector, struct edid *edid) 1056{ 1057 struct detailed_mode_closure closure = { 1058 connector, edid, 0, 0, 0 1059 }; 1060 1061 if (version_greater(edid, 1, 0)) 1062 drm_for_each_detailed_block((u8 *)edid, do_inferred_modes, 1063 &closure); 1064 1065 return closure.modes; 1066} 1067 1068static int 1069drm_est3_modes(struct drm_connector *connector, struct detailed_timing *timing) 1070{ 1071 int i, j, m, modes = 0; 1072 struct drm_display_mode *mode; 1073 u8 *est = ((u8 *)timing) + 5; 1074 1075 for (i = 0; i < 6; i++) { 1076 for (j = 7; j > 0; j--) { 1077 m = (i * 8) + (7 - j); 1078 if (m >= DRM_ARRAY_SIZE(est3_modes)) 1079 break; 1080 if (est[i] & (1 << j)) { 1081 mode = drm_mode_find_dmt(connector->dev, 1082 est3_modes[m].w, 1083 est3_modes[m].h, 1084 est3_modes[m].r 1085 /*, est3_modes[m].rb */); 1086 if (mode) { 1087 drm_mode_probed_add(connector, mode); 1088 modes++; 1089 } 1090 } 1091 } 1092 } 1093 1094 return modes; 1095} 1096 1097static void 1098do_established_modes(struct detailed_timing *timing, void *c) 1099{ 1100 struct detailed_mode_closure *closure = c; 1101 struct detailed_non_pixel *data = &timing->data.other_data; 1102 1103 if (data->type == EDID_DETAIL_EST_TIMINGS) 1104 closure->modes += drm_est3_modes(closure->connector, timing); 1105} 1106 1107/** 1108 * add_established_modes - get est. modes from EDID and add them 1109 * @edid: EDID block to scan 1110 * 1111 * Each EDID block contains a bitmap of the supported "established modes" list 1112 * (defined above). Tease them out and add them to the global modes list. 1113 */ 1114static int 1115add_established_modes(struct drm_connector *connector, struct edid *edid) 1116{ 1117 struct drm_device *dev = connector->dev; 1118 unsigned long est_bits = edid->established_timings.t1 | 1119 (edid->established_timings.t2 << 8) | 1120 ((edid->established_timings.mfg_rsvd & 0x80) << 9); 1121 int i, modes = 0; 1122 struct detailed_mode_closure closure = { 1123 connector, edid, 0, 0, 0 1124 }; 1125 1126 for (i = 0; i <= EDID_EST_TIMINGS; i++) { 1127 if (est_bits & (1<<i)) { 1128 struct drm_display_mode *newmode; 1129 newmode = drm_mode_duplicate(dev, &edid_est_modes[i]); 1130 if (newmode) { 1131 drm_mode_probed_add(connector, newmode); 1132 modes++; 1133 } 1134 } 1135 } 1136 1137 if (version_greater(edid, 1, 0)) 1138 drm_for_each_detailed_block((u8 *)edid, 1139 do_established_modes, &closure); 1140 1141 return modes + closure.modes; 1142} 1143 1144static void 1145do_standard_modes(struct detailed_timing *timing, void *c) 1146{ 1147 struct detailed_mode_closure *closure = c; 1148 struct detailed_non_pixel *data = &timing->data.other_data; 1149 struct drm_connector *connector = closure->connector; 1150 struct edid *edid = closure->edid; 1151 1152 if (data->type == EDID_DETAIL_STD_MODES) { 1153 int i; 1154 for (i = 0; i < 6; i++) { 1155 struct std_timing *std; 1156 struct drm_display_mode *newmode; 1157 1158 std = &data->data.timings[i]; 1159 newmode = drm_mode_std(connector, edid, std, 1160 edid->revision); 1161 if (newmode) { 1162 drm_mode_probed_add(connector, newmode); 1163 closure->modes++; 1164 } 1165 } 1166 } 1167} 1168 1169/** 1170 * add_standard_modes - get std. modes from EDID and add them 1171 * @edid: EDID block to scan 1172 * 1173 * Standard modes can be calculated using the appropriate standard (DMT, 1174 * GTF or CVT. Grab them from @edid and add them to the list. 1175 */ 1176static int 1177add_standard_modes(struct drm_connector *connector, struct edid *edid) 1178{ 1179 int i, modes = 0; 1180 struct detailed_mode_closure closure = { 1181 connector, edid, 0, 0, 0 1182 }; 1183 1184 for (i = 0; i < EDID_STD_TIMINGS; i++) { 1185 struct drm_display_mode *newmode; 1186 1187 newmode = drm_mode_std(connector, edid, 1188 &edid->standard_timings[i], 1189 edid->revision); 1190 if (newmode) { 1191 drm_mode_probed_add(connector, newmode); 1192 modes++; 1193 } 1194 } 1195 1196 if (version_greater(edid, 1, 0)) 1197 drm_for_each_detailed_block((u8 *)edid, do_standard_modes, 1198 &closure); 1199 1200 /* XXX should also look for standard codes in VTB blocks */ 1201 1202 return modes + closure.modes; 1203} 1204 1205static int drm_cvt_modes(struct drm_connector *connector, 1206 struct detailed_timing *timing) 1207{ 1208 int i, j, modes = 0; 1209 struct drm_display_mode *newmode; 1210 struct drm_device *dev = connector->dev; 1211 struct cvt_timing *cvt; 1212 const int rates[] = { 60, 85, 75, 60, 50 }; 1213 const u8 empty[3] = { 0, 0, 0 }; 1214 1215 for (i = 0; i < 4; i++) { 1216 int width = 0, height; 1217 cvt = &(timing->data.other_data.data.cvt[i]); 1218 1219 if (!memcmp(cvt->code, empty, 3)) 1220 continue; 1221 1222 height = (cvt->code[0] + ((cvt->code[1] & 0xf0) << 4) + 1) * 2; 1223 switch (cvt->code[1] & 0x0c) { 1224 case 0x00: 1225 width = height * 4 / 3; 1226 break; 1227 case 0x04: 1228 width = height * 16 / 9; 1229 break; 1230 case 0x08: 1231 width = height * 16 / 10; 1232 break; 1233 case 0x0c: 1234 width = height * 15 / 9; 1235 break; 1236 } 1237 1238 for (j = 1; j < 5; j++) { 1239 if (cvt->code[2] & (1 << j)) { 1240 newmode = drm_cvt_mode(dev, width, height, 1241 rates[j], j == 0, 1242 false, false); 1243 if (newmode) { 1244 drm_mode_probed_add(connector, newmode); 1245 modes++; 1246 } 1247 } 1248 } 1249 } 1250 1251 return modes; 1252} 1253 1254static void 1255do_cvt_mode(struct detailed_timing *timing, void *c) 1256{ 1257 struct detailed_mode_closure *closure = c; 1258 struct detailed_non_pixel *data = &timing->data.other_data; 1259 1260 if (data->type == EDID_DETAIL_CVT_3BYTE) 1261 closure->modes += drm_cvt_modes(closure->connector, timing); 1262} 1263 1264static int 1265add_cvt_modes(struct drm_connector *connector, struct edid *edid) 1266{ 1267 struct detailed_mode_closure closure = { 1268 connector, edid, 0, 0, 0 1269 }; 1270 1271 if (version_greater(edid, 1, 2)) 1272 drm_for_each_detailed_block((u8 *)edid, do_cvt_mode, &closure); 1273 1274 /* XXX should also look for CVT codes in VTB blocks */ 1275 1276 return closure.modes; 1277} 1278 1279static void 1280do_detailed_mode(struct detailed_timing *timing, void *c) 1281{ 1282 struct detailed_mode_closure *closure = c; 1283 struct drm_display_mode *newmode; 1284 1285 if (timing->pixel_clock) { 1286 newmode = drm_mode_detailed(closure->connector->dev, 1287 closure->edid, timing, 1288 closure->quirks); 1289 if (!newmode) 1290 return; 1291 1292 if (closure->preferred) 1293 newmode->type |= DRM_MODE_TYPE_PREFERRED; 1294 1295 drm_mode_probed_add(closure->connector, newmode); 1296 closure->modes++; 1297 closure->preferred = 0; 1298 } 1299} 1300 1301/* 1302 * add_detailed_modes - Add modes from detailed timings 1303 * @connector: attached connector 1304 * @edid: EDID block to scan 1305 * @quirks: quirks to apply 1306 */ 1307static int 1308add_detailed_modes(struct drm_connector *connector, struct edid *edid, 1309 u32 quirks) 1310{ 1311 struct detailed_mode_closure closure = { 1312 connector, 1313 edid, 1314 1, 1315 quirks, 1316 0 1317 }; 1318 1319 if (closure.preferred && !version_greater(edid, 1, 3)) 1320 closure.preferred = 1321 (edid->features & DRM_EDID_FEATURE_PREFERRED_TIMING); 1322 1323 drm_for_each_detailed_block((u8 *)edid, do_detailed_mode, &closure); 1324 1325 return closure.modes; 1326} 1327 1328#define HDMI_IDENTIFIER 0x000C03 1329#define AUDIO_BLOCK 0x01 1330#define VENDOR_BLOCK 0x03 1331#define SPEAKER_BLOCK 0x04 1332#define EDID_BASIC_AUDIO (1 << 6) 1333 1334/** 1335 * Search EDID for CEA extension block. 1336 */ 1337u8 *drm_find_cea_extension(struct edid *edid) 1338{ 1339 u8 *edid_ext = NULL; 1340 int i; 1341 1342 /* No EDID or EDID extensions */ 1343 if (edid == NULL || edid->extensions == 0) 1344 return NULL; 1345 1346 /* Find CEA extension */ 1347 for (i = 0; i < edid->extensions; i++) { 1348 edid_ext = (u8 *)edid + EDID_LENGTH * (i + 1); 1349 if (edid_ext[0] == CEA_EXT) 1350 break; 1351 } 1352 1353 if (i == edid->extensions) 1354 return NULL; 1355 1356 return edid_ext; 1357} 1358 1359static void 1360parse_hdmi_vsdb(struct drm_connector *connector, uint8_t *db) 1361{ 1362 connector->eld[5] |= (db[6] >> 7) << 1; /* Supports_AI */ 1363 1364 connector->dvi_dual = db[6] & 1; 1365 connector->max_tmds_clock = db[7] * 5; 1366 1367 connector->latency_present[0] = db[8] >> 7; 1368 connector->latency_present[1] = (db[8] >> 6) & 1; 1369 connector->video_latency[0] = db[9]; 1370 connector->audio_latency[0] = db[10]; 1371 connector->video_latency[1] = db[11]; 1372 connector->audio_latency[1] = db[12]; 1373 1374 DRM_DEBUG_KMS("HDMI: DVI dual %d, " 1375 "max TMDS clock %d, " 1376 "latency present %d %d, " 1377 "video latency %d %d, " 1378 "audio latency %d %d\n", 1379 connector->dvi_dual, 1380 connector->max_tmds_clock, 1381 (int) connector->latency_present[0], 1382 (int) connector->latency_present[1], 1383 connector->video_latency[0], 1384 connector->video_latency[1], 1385 connector->audio_latency[0], 1386 connector->audio_latency[1]); 1387} 1388 1389static void 1390monitor_name(struct detailed_timing *t, void *data) 1391{ 1392 if (t->data.other_data.type == EDID_DETAIL_MONITOR_NAME) 1393 *(u8 **)data = t->data.other_data.data.str.str; 1394} 1395 1396/** 1397 * drm_edid_to_eld - build ELD from EDID 1398 * @connector: connector corresponding to the HDMI/DP sink 1399 * @edid: EDID to parse 1400 * 1401 * Fill the ELD (EDID-Like Data) buffer for passing to the audio driver. 1402 * Some ELD fields are left to the graphics driver caller: 1403 * - Conn_Type 1404 * - HDCP 1405 * - Port_ID 1406 */ 1407void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid) 1408{ 1409 uint8_t *eld = connector->eld; 1410 u8 *cea; 1411 u8 *name; 1412 u8 *db; 1413 int sad_count = 0; 1414 int mnl; 1415 int dbl; 1416 1417 memset(eld, 0, sizeof(connector->eld)); 1418 1419 cea = drm_find_cea_extension(edid); 1420 if (!cea) { 1421 DRM_DEBUG_KMS("ELD: no CEA Extension found\n"); 1422 return; 1423 } 1424 1425 name = NULL; 1426 drm_for_each_detailed_block((u8 *)edid, monitor_name, &name); 1427 for (mnl = 0; name && mnl < 13; mnl++) { 1428 if (name[mnl] == 0x0a) 1429 break; 1430 eld[20 + mnl] = name[mnl]; 1431 } 1432 eld[4] = (cea[1] << 5) | mnl; 1433 DRM_DEBUG_KMS("ELD monitor %s\n", eld + 20); 1434 1435 eld[0] = 2 << 3; /* ELD version: 2 */ 1436 1437 eld[16] = edid->mfg_id[0]; 1438 eld[17] = edid->mfg_id[1]; 1439 eld[18] = edid->prod_code[0]; 1440 eld[19] = edid->prod_code[1]; 1441 1442 for (db = cea + 4; db < cea + cea[2]; db += dbl + 1) { 1443 dbl = db[0] & 0x1f; 1444 1445 switch ((db[0] & 0xe0) >> 5) { 1446 case AUDIO_BLOCK: /* Audio Data Block, contains SADs */ 1447 sad_count = dbl / 3; 1448 memcpy(eld + 20 + mnl, &db[1], dbl); 1449 break; 1450 case SPEAKER_BLOCK: /* Speaker Allocation Data Block */ 1451 eld[7] = db[1]; 1452 break; 1453 case VENDOR_BLOCK: 1454 /* HDMI Vendor-Specific Data Block */ 1455 if (db[1] == 0x03 && db[2] == 0x0c && db[3] == 0) 1456 parse_hdmi_vsdb(connector, db); 1457 break; 1458 default: 1459 break; 1460 } 1461 } 1462 eld[5] |= sad_count << 4; 1463 eld[2] = (20 + mnl + sad_count * 3 + 3) / 4; 1464 1465 DRM_DEBUG_KMS("ELD size %d, SAD count %d\n", (int)eld[2], sad_count); 1466} 1467 1468/** 1469 * drm_av_sync_delay - HDMI/DP sink audio-video sync delay in millisecond 1470 * @connector: connector associated with the HDMI/DP sink 1471 * @mode: the display mode 1472 */ 1473int drm_av_sync_delay(struct drm_connector *connector, 1474 struct drm_display_mode *mode) 1475{ 1476 int i = !!(mode->flags & DRM_MODE_FLAG_INTERLACE); 1477 int a, v; 1478 1479 if (!connector->latency_present[0]) 1480 return 0; 1481 if (!connector->latency_present[1]) 1482 i = 0; 1483 1484 a = connector->audio_latency[i]; 1485 v = connector->video_latency[i]; 1486 1487 /* 1488 * HDMI/DP sink doesn't support audio or video? 1489 */ 1490 if (a == 255 || v == 255) 1491 return 0; 1492 1493 /* 1494 * Convert raw EDID values to millisecond. 1495 * Treat unknown latency as 0ms. 1496 */ 1497 if (a) 1498 a = min(2 * (a - 1), 500); 1499 if (v) 1500 v = min(2 * (v - 1), 500); 1501 1502 return max(v - a, 0); 1503} 1504 1505/** 1506 * drm_select_eld - select one ELD from multiple HDMI/DP sinks 1507 * @encoder: the encoder just changed display mode 1508 * @mode: the adjusted display mode 1509 * 1510 * It's possible for one encoder to be associated with multiple HDMI/DP sinks. 1511 * The policy is now hard coded to simply use the first HDMI/DP sink's ELD. 1512 */ 1513struct drm_connector *drm_select_eld(struct drm_encoder *encoder, 1514 struct drm_display_mode *mode) 1515{ 1516 struct drm_connector *connector; 1517 struct drm_device *dev = encoder->dev; 1518 1519 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 1520 if (connector->encoder == encoder && connector->eld[0]) 1521 return connector; 1522 1523 return NULL; 1524} 1525 1526/** 1527 * drm_detect_hdmi_monitor - detect whether monitor is hdmi. 1528 * @edid: monitor EDID information 1529 * 1530 * Parse the CEA extension according to CEA-861-B. 1531 * Return true if HDMI, false if not or unknown. 1532 */ 1533bool drm_detect_hdmi_monitor(struct edid *edid) 1534{ 1535 u8 *edid_ext; 1536 int i, hdmi_id; 1537 int start_offset, end_offset; 1538 bool is_hdmi = false; 1539 1540 edid_ext = drm_find_cea_extension(edid); 1541 if (!edid_ext) 1542 goto end; 1543 1544 /* Data block offset in CEA extension block */ 1545 start_offset = 4; 1546 end_offset = edid_ext[2]; 1547 1548 /* 1549 * Because HDMI identifier is in Vendor Specific Block, 1550 * search it from all data blocks of CEA extension. 1551 */ 1552 for (i = start_offset; i < end_offset; 1553 /* Increased by data block len */ 1554 i += ((edid_ext[i] & 0x1f) + 1)) { 1555 /* Find vendor specific block */ 1556 if ((edid_ext[i] >> 5) == VENDOR_BLOCK) { 1557 hdmi_id = edid_ext[i + 1] | (edid_ext[i + 2] << 8) | 1558 edid_ext[i + 3] << 16; 1559 /* Find HDMI identifier */ 1560 if (hdmi_id == HDMI_IDENTIFIER) 1561 is_hdmi = true; 1562 break; 1563 } 1564 } 1565 1566end: 1567 return is_hdmi; 1568} 1569 1570/** 1571 * drm_detect_monitor_audio - check monitor audio capability 1572 * 1573 * Monitor should have CEA extension block. 1574 * If monitor has 'basic audio', but no CEA audio blocks, it's 'basic 1575 * audio' only. If there is any audio extension block and supported 1576 * audio format, assume at least 'basic audio' support, even if 'basic 1577 * audio' is not defined in EDID. 1578 * 1579 */ 1580bool drm_detect_monitor_audio(struct edid *edid) 1581{ 1582 u8 *edid_ext; 1583 int i, j; 1584 bool has_audio = false; 1585 int start_offset, end_offset; 1586 1587 edid_ext = drm_find_cea_extension(edid); 1588 if (!edid_ext) 1589 goto end; 1590 1591 has_audio = ((edid_ext[3] & EDID_BASIC_AUDIO) != 0); 1592 1593 if (has_audio) { 1594 DRM_DEBUG_KMS("Monitor has basic audio support\n"); 1595 goto end; 1596 } 1597 1598 /* Data block offset in CEA extension block */ 1599 start_offset = 4; 1600 end_offset = edid_ext[2]; 1601 1602 for (i = start_offset; i < end_offset; 1603 i += ((edid_ext[i] & 0x1f) + 1)) { 1604 if ((edid_ext[i] >> 5) == AUDIO_BLOCK) { 1605 has_audio = true; 1606 for (j = 1; j < (edid_ext[i] & 0x1f); j += 3) 1607 DRM_DEBUG_KMS("CEA audio format %d\n", 1608 (edid_ext[i + j] >> 3) & 0xf); 1609 goto end; 1610 } 1611 } 1612end: 1613 return has_audio; 1614} 1615 1616/** 1617 * drm_add_display_info - pull display info out if present 1618 * @edid: EDID data 1619 * @info: display info (attached to connector) 1620 * 1621 * Grab any available display info and stuff it into the drm_display_info 1622 * structure that's part of the connector. Useful for tracking bpp and 1623 * color spaces. 1624 */ 1625static void drm_add_display_info(struct edid *edid, 1626 struct drm_display_info *info) 1627{ 1628 u8 *edid_ext; 1629 1630 info->width_mm = edid->width_cm * 10; 1631 info->height_mm = edid->height_cm * 10; 1632 1633 /* driver figures it out in this case */ 1634 info->bpc = 0; 1635 info->color_formats = 0; 1636 1637 /* Only defined for 1.4 with digital displays */ 1638 if (edid->revision < 4) 1639 return; 1640 1641 if (!(edid->input & DRM_EDID_INPUT_DIGITAL)) 1642 return; 1643 1644 switch (edid->input & DRM_EDID_DIGITAL_DEPTH_MASK) { 1645 case DRM_EDID_DIGITAL_DEPTH_6: 1646 info->bpc = 6; 1647 break; 1648 case DRM_EDID_DIGITAL_DEPTH_8: 1649 info->bpc = 8; 1650 break; 1651 case DRM_EDID_DIGITAL_DEPTH_10: 1652 info->bpc = 10; 1653 break; 1654 case DRM_EDID_DIGITAL_DEPTH_12: 1655 info->bpc = 12; 1656 break; 1657 case DRM_EDID_DIGITAL_DEPTH_14: 1658 info->bpc = 14; 1659 break; 1660 case DRM_EDID_DIGITAL_DEPTH_16: 1661 info->bpc = 16; 1662 break; 1663 case DRM_EDID_DIGITAL_DEPTH_UNDEF: 1664 default: 1665 info->bpc = 0; 1666 break; 1667 } 1668 1669 info->color_formats = DRM_COLOR_FORMAT_RGB444; 1670 if (info->color_formats & DRM_EDID_FEATURE_RGB_YCRCB444) 1671 info->color_formats = DRM_COLOR_FORMAT_YCRCB444; 1672 if (info->color_formats & DRM_EDID_FEATURE_RGB_YCRCB422) 1673 info->color_formats = DRM_COLOR_FORMAT_YCRCB422; 1674 1675 /* Get data from CEA blocks if present */ 1676 edid_ext = drm_find_cea_extension(edid); 1677 if (!edid_ext) 1678 return; 1679 1680 info->cea_rev = edid_ext[1]; 1681} 1682 1683/** 1684 * drm_add_edid_modes - add modes from EDID data, if available 1685 * @connector: connector we're probing 1686 * @edid: edid data 1687 * 1688 * Add the specified modes to the connector's mode list. 1689 * 1690 * Return number of modes added or 0 if we couldn't find any. 1691 */ 1692int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid) 1693{ 1694 int num_modes = 0; 1695 u32 quirks; 1696 1697 if (edid == NULL) { 1698 return 0; 1699 } 1700 if (!drm_edid_is_valid(edid)) { 1701 device_printf(connector->dev->device, "%s: EDID invalid.\n", 1702 drm_get_connector_name(connector)); 1703 return 0; 1704 } 1705 1706 quirks = edid_get_quirks(edid); 1707 1708 /* 1709 * EDID spec says modes should be preferred in this order: 1710 * - preferred detailed mode 1711 * - other detailed modes from base block 1712 * - detailed modes from extension blocks 1713 * - CVT 3-byte code modes 1714 * - standard timing codes 1715 * - established timing codes 1716 * - modes inferred from GTF or CVT range information 1717 * 1718 * We get this pretty much right. 1719 * 1720 * XXX order for additional mode types in extension blocks? 1721 */ 1722 num_modes += add_detailed_modes(connector, edid, quirks); 1723 num_modes += add_cvt_modes(connector, edid); 1724 num_modes += add_standard_modes(connector, edid); 1725 num_modes += add_established_modes(connector, edid); 1726 num_modes += add_inferred_modes(connector, edid); 1727 1728 if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75)) 1729 edid_fixup_preferred(connector, quirks); 1730 1731 drm_add_display_info(edid, &connector->display_info); 1732 1733 return num_modes; 1734} 1735 1736/** 1737 * drm_add_modes_noedid - add modes for the connectors without EDID 1738 * @connector: connector we're probing 1739 * @hdisplay: the horizontal display limit 1740 * @vdisplay: the vertical display limit 1741 * 1742 * Add the specified modes to the connector's mode list. Only when the 1743 * hdisplay/vdisplay is not beyond the given limit, it will be added. 1744 * 1745 * Return number of modes added or 0 if we couldn't find any. 1746 */ 1747int drm_add_modes_noedid(struct drm_connector *connector, 1748 int hdisplay, int vdisplay) 1749{ 1750 int i, count, num_modes = 0; 1751 struct drm_display_mode *mode; 1752 struct drm_device *dev = connector->dev; 1753 1754 count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode); 1755 if (hdisplay < 0) 1756 hdisplay = 0; 1757 if (vdisplay < 0) 1758 vdisplay = 0; 1759 1760 for (i = 0; i < count; i++) { 1761 struct drm_display_mode *ptr = &drm_dmt_modes[i]; 1762 if (hdisplay && vdisplay) { 1763 /* 1764 * Only when two are valid, they will be used to check 1765 * whether the mode should be added to the mode list of 1766 * the connector. 1767 */ 1768 if (ptr->hdisplay > hdisplay || 1769 ptr->vdisplay > vdisplay) 1770 continue; 1771 } 1772 if (drm_mode_vrefresh(ptr) > 61) 1773 continue; 1774 mode = drm_mode_duplicate(dev, ptr); 1775 if (mode) { 1776 drm_mode_probed_add(connector, mode); 1777 num_modes++; 1778 } 1779 } 1780 return num_modes; 1781} 1782