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