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 <linux/export.h> 32 #include <linux/kernel.h> 33 #include <linux/i2c.h> 34 #include <drm/drmP.h> 35 #include <drm/drm_edid.h> 36 #include "drm_edid_modes.h" 37 #include <bus/iicbus/iic.h> 38 #include <bus/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 /* Force reduced-blanking timings for detailed modes */ 73 #define EDID_QUIRK_FORCE_REDUCED_BLANKING (1 << 7) 74 75 struct detailed_mode_closure { 76 struct drm_connector *connector; 77 struct edid *edid; 78 bool preferred; 79 u32 quirks; 80 int modes; 81 }; 82 83 #define LEVEL_DMT 0 84 #define LEVEL_GTF 1 85 #define LEVEL_GTF2 2 86 #define LEVEL_CVT 3 87 88 static struct edid_quirk { 89 char vendor[4]; 90 int product_id; 91 u32 quirks; 92 } edid_quirk_list[] = { 93 /* ASUS VW222S */ 94 { "ACI", 0x22a2, EDID_QUIRK_FORCE_REDUCED_BLANKING }, 95 96 /* Acer AL1706 */ 97 { "ACR", 44358, EDID_QUIRK_PREFER_LARGE_60 }, 98 /* Acer F51 */ 99 { "API", 0x7602, EDID_QUIRK_PREFER_LARGE_60 }, 100 /* Unknown Acer */ 101 { "ACR", 2423, EDID_QUIRK_FIRST_DETAILED_PREFERRED }, 102 103 /* Belinea 10 15 55 */ 104 { "MAX", 1516, EDID_QUIRK_PREFER_LARGE_60 }, 105 { "MAX", 0x77e, EDID_QUIRK_PREFER_LARGE_60 }, 106 107 /* Envision Peripherals, Inc. EN-7100e */ 108 { "EPI", 59264, EDID_QUIRK_135_CLOCK_TOO_HIGH }, 109 /* Envision EN2028 */ 110 { "EPI", 8232, EDID_QUIRK_PREFER_LARGE_60 }, 111 112 /* Funai Electronics PM36B */ 113 { "FCM", 13600, EDID_QUIRK_PREFER_LARGE_75 | 114 EDID_QUIRK_DETAILED_IN_CM }, 115 116 /* LG Philips LCD LP154W01-A5 */ 117 { "LPL", 0, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE }, 118 { "LPL", 0x2a00, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE }, 119 120 /* Philips 107p5 CRT */ 121 { "PHL", 57364, EDID_QUIRK_FIRST_DETAILED_PREFERRED }, 122 123 /* Proview AY765C */ 124 { "PTS", 765, EDID_QUIRK_FIRST_DETAILED_PREFERRED }, 125 126 /* Samsung SyncMaster 205BW. Note: irony */ 127 { "SAM", 541, EDID_QUIRK_DETAILED_SYNC_PP }, 128 /* Samsung SyncMaster 22[5-6]BW */ 129 { "SAM", 596, EDID_QUIRK_PREFER_LARGE_60 }, 130 { "SAM", 638, EDID_QUIRK_PREFER_LARGE_60 }, 131 132 /* ViewSonic VA2026w */ 133 { "VSC", 5020, EDID_QUIRK_FORCE_REDUCED_BLANKING }, 134 }; 135 136 /*** DDC fetch and block validation ***/ 137 138 static const u8 edid_header[] = { 139 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 140 }; 141 142 /* 143 * Sanity check the header of the base EDID block. Return 8 if the header 144 * is perfect, down to 0 if it's totally wrong. 145 */ 146 int drm_edid_header_is_valid(const u8 *raw_edid) 147 { 148 int i, score = 0; 149 150 for (i = 0; i < sizeof(edid_header); i++) 151 if (raw_edid[i] == edid_header[i]) 152 score++; 153 154 return score; 155 } 156 EXPORT_SYMBOL(drm_edid_header_is_valid); 157 158 static int edid_fixup __read_mostly = 6; 159 160 /* 161 * Sanity check the EDID block (base or extension). Return 0 if the block 162 * doesn't check out, or 1 if it's valid. 163 */ 164 bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid) 165 { 166 int i; 167 u8 csum = 0; 168 struct edid *edid = (struct edid *)raw_edid; 169 170 if (edid_fixup > 8 || edid_fixup < 0) 171 edid_fixup = 6; 172 173 if (block == 0) { 174 int score = drm_edid_header_is_valid(raw_edid); 175 if (score == 8) ; 176 else if (score >= edid_fixup) { 177 DRM_DEBUG("Fixing EDID header, your hardware may be failing\n"); 178 memcpy(raw_edid, edid_header, sizeof(edid_header)); 179 } else { 180 goto bad; 181 } 182 } 183 184 for (i = 0; i < EDID_LENGTH; i++) 185 csum += raw_edid[i]; 186 if (csum) { 187 if (print_bad_edid) { 188 DRM_ERROR("EDID checksum is invalid, remainder is %d\n", csum); 189 } 190 191 /* allow CEA to slide through, switches mangle this */ 192 if (raw_edid[0] != 0x02) 193 goto bad; 194 } 195 196 /* per-block-type checks */ 197 switch (raw_edid[0]) { 198 case 0: /* base */ 199 if (edid->version != 1) { 200 DRM_ERROR("EDID has major version %d, instead of 1\n", edid->version); 201 goto bad; 202 } 203 204 if (edid->revision > 4) 205 DRM_DEBUG("EDID minor > 4, assuming backward compatibility\n"); 206 break; 207 208 default: 209 break; 210 } 211 212 return 1; 213 214 bad: 215 if (raw_edid && print_bad_edid) { 216 DRM_DEBUG_KMS("Raw EDID:\n"); 217 if ((drm_debug & DRM_DEBUGBITS_KMS) != 0) { 218 for (i = 0; i < EDID_LENGTH; ) { 219 kprintf("%02x", raw_edid[i]); 220 i++; 221 if (i % 16 == 0 || i == EDID_LENGTH) 222 kprintf("\n"); 223 else if (i % 8 == 0) 224 kprintf(" "); 225 else 226 kprintf(" "); 227 } 228 } 229 } 230 return 0; 231 } 232 EXPORT_SYMBOL(drm_edid_block_valid); 233 234 /** 235 * drm_edid_is_valid - sanity check EDID data 236 * @edid: EDID data 237 * 238 * Sanity-check an entire EDID record (including extensions) 239 */ 240 bool drm_edid_is_valid(struct edid *edid) 241 { 242 int i; 243 u8 *raw = (u8 *)edid; 244 245 if (!edid) 246 return false; 247 248 for (i = 0; i <= edid->extensions; i++) 249 if (!drm_edid_block_valid(raw + i * EDID_LENGTH, i, true)) 250 return false; 251 252 return true; 253 } 254 EXPORT_SYMBOL(drm_edid_is_valid); 255 256 #define DDC_SEGMENT_ADDR 0x30 257 /** 258 * Get EDID information via I2C. 259 * 260 * \param adapter : i2c device adaptor 261 * \param buf : EDID data buffer to be filled 262 * \param len : EDID data buffer length 263 * \return 0 on success or -1 on failure. 264 * 265 * Try to fetch EDID information by calling i2c driver function. 266 */ 267 static int 268 drm_do_probe_ddc_edid(device_t adapter, unsigned char *buf, 269 int block, int len) 270 { 271 unsigned char start = block * EDID_LENGTH; 272 unsigned char segment = block >> 1; 273 unsigned char xfers = segment ? 3 : 2; 274 int ret, retries = 5; 275 276 /* The core i2c driver will automatically retry the transfer if the 277 * adapter reports EAGAIN. However, we find that bit-banging transfers 278 * are susceptible to errors under a heavily loaded machine and 279 * generate spurious NAKs and timeouts. Retrying the transfer 280 * of the individual block a few times seems to overcome this. 281 */ 282 do { 283 struct i2c_msg msgs[] = { 284 { 285 .slave = DDC_SEGMENT_ADDR << 1, 286 .flags = 0, 287 .len = 1, 288 .buf = &segment, 289 }, { 290 .slave = DDC_ADDR << 1, 291 .flags = 0, 292 .len = 1, 293 .buf = &start, 294 }, { 295 .slave = DDC_ADDR << 1, 296 .flags = I2C_M_RD, 297 .len = len, 298 .buf = buf, 299 } 300 }; 301 302 /* 303 * Avoid sending the segment addr to not upset non-compliant ddc 304 * monitors. 305 */ 306 ret = iicbus_transfer(adapter, &msgs[3 - xfers], xfers); 307 308 if (ret != 0) 309 DRM_DEBUG_KMS("iicbus_transfer countdown %d error %d\n", 310 retries, ret); 311 } while (ret != 0 && --retries); 312 313 return (ret == 0 ? 0 : -1); 314 } 315 316 static bool drm_edid_is_zero(u8 *in_edid, int length) 317 { 318 int i; 319 u32 *raw_edid = (u32 *)in_edid; 320 321 for (i = 0; i < length / 4; i++) 322 if (*(raw_edid + i) != 0) 323 return false; 324 return true; 325 } 326 327 static u8 * 328 drm_do_get_edid(struct drm_connector *connector, device_t adapter) 329 { 330 int i, j = 0, valid_extensions = 0; 331 u8 *block, *new; 332 bool print_bad_edid = !connector->bad_edid_counter || (drm_debug & DRM_UT_KMS); 333 334 block = kmalloc(EDID_LENGTH, M_DRM, M_WAITOK | M_ZERO); 335 336 /* base block fetch */ 337 for (i = 0; i < 4; i++) { 338 if (drm_do_probe_ddc_edid(adapter, block, 0, EDID_LENGTH)) 339 goto out; 340 if (drm_edid_block_valid(block, 0, print_bad_edid)) 341 break; 342 if (i == 0 && drm_edid_is_zero(block, EDID_LENGTH)) { 343 connector->null_edid_counter++; 344 goto carp; 345 } 346 } 347 if (i == 4) 348 goto carp; 349 350 /* if there's no extensions, we're done */ 351 if (block[0x7e] == 0) 352 return block; 353 354 new = krealloc(block, (block[0x7e] + 1) * EDID_LENGTH, M_DRM, 355 M_WAITOK); 356 if (!new) 357 goto out; 358 block = new; 359 360 for (j = 1; j <= block[0x7e]; j++) { 361 for (i = 0; i < 4; i++) { 362 if (drm_do_probe_ddc_edid(adapter, 363 block + (valid_extensions + 1) * EDID_LENGTH, 364 j, EDID_LENGTH)) 365 goto out; 366 if (drm_edid_block_valid(block + (valid_extensions + 1) * EDID_LENGTH, j, print_bad_edid)) { 367 valid_extensions++; 368 break; 369 } 370 } 371 if (i == 4) 372 dev_warn(connector->dev->dev, 373 "%s: Ignoring invalid EDID block %d.\n", 374 drm_get_connector_name(connector), j); 375 } 376 377 if (valid_extensions != block[0x7e]) { 378 block[EDID_LENGTH-1] += block[0x7e] - valid_extensions; 379 block[0x7e] = valid_extensions; 380 new = krealloc(block, (valid_extensions + 1) * EDID_LENGTH, 381 M_DRM, M_WAITOK); 382 if (!new) 383 goto out; 384 block = new; 385 } 386 387 return block; 388 389 carp: 390 if (print_bad_edid) { 391 dev_warn(connector->dev->dev, "%s: EDID block %d invalid.\n", 392 drm_get_connector_name(connector), j); 393 } 394 connector->bad_edid_counter++; 395 396 out: 397 kfree(block, M_DRM); 398 return NULL; 399 } 400 401 /** 402 * Probe DDC presence. 403 * 404 * \param adapter : i2c device adaptor 405 * \return 1 on success 406 */ 407 bool 408 drm_probe_ddc(device_t adapter) 409 { 410 unsigned char out; 411 412 return (drm_do_probe_ddc_edid(adapter, &out, 0, 1) == 0); 413 } 414 EXPORT_SYMBOL(drm_probe_ddc); 415 416 /** 417 * drm_get_edid - get EDID data, if available 418 * @connector: connector we're probing 419 * @adapter: i2c adapter to use for DDC 420 * 421 * Poke the given i2c channel to grab EDID data if possible. If found, 422 * attach it to the connector. 423 * 424 * Return edid data or NULL if we couldn't find any. 425 */ 426 struct edid *drm_get_edid(struct drm_connector *connector, 427 device_t adapter) 428 { 429 struct edid *edid = NULL; 430 431 if (drm_probe_ddc(adapter)) 432 edid = (struct edid *)drm_do_get_edid(connector, adapter); 433 434 return edid; 435 } 436 EXPORT_SYMBOL(drm_get_edid); 437 438 /*** EDID parsing ***/ 439 440 /** 441 * edid_vendor - match a string against EDID's obfuscated vendor field 442 * @edid: EDID to match 443 * @vendor: vendor string 444 * 445 * Returns true if @vendor is in @edid, false otherwise 446 */ 447 static bool edid_vendor(struct edid *edid, char *vendor) 448 { 449 char edid_vendor[3]; 450 451 edid_vendor[0] = ((edid->mfg_id[0] & 0x7c) >> 2) + '@'; 452 edid_vendor[1] = (((edid->mfg_id[0] & 0x3) << 3) | 453 ((edid->mfg_id[1] & 0xe0) >> 5)) + '@'; 454 edid_vendor[2] = (edid->mfg_id[1] & 0x1f) + '@'; 455 456 return !strncmp(edid_vendor, vendor, 3); 457 } 458 459 /** 460 * edid_get_quirks - return quirk flags for a given EDID 461 * @edid: EDID to process 462 * 463 * This tells subsequent routines what fixes they need to apply. 464 */ 465 static u32 edid_get_quirks(struct edid *edid) 466 { 467 struct edid_quirk *quirk; 468 int i; 469 470 for (i = 0; i < ARRAY_SIZE(edid_quirk_list); i++) { 471 quirk = &edid_quirk_list[i]; 472 473 if (edid_vendor(edid, quirk->vendor) && 474 (EDID_PRODUCT_ID(edid) == quirk->product_id)) 475 return quirk->quirks; 476 } 477 478 return 0; 479 } 480 481 #define MODE_SIZE(m) ((m)->hdisplay * (m)->vdisplay) 482 #define MODE_REFRESH_DIFF(m,r) (abs((m)->vrefresh - target_refresh)) 483 484 /** 485 * edid_fixup_preferred - set preferred modes based on quirk list 486 * @connector: has mode list to fix up 487 * @quirks: quirks list 488 * 489 * Walk the mode list for @connector, clearing the preferred status 490 * on existing modes and setting it anew for the right mode ala @quirks. 491 */ 492 static void edid_fixup_preferred(struct drm_connector *connector, 493 u32 quirks) 494 { 495 struct drm_display_mode *t, *cur_mode, *preferred_mode; 496 int target_refresh = 0; 497 498 if (list_empty(&connector->probed_modes)) 499 return; 500 501 if (quirks & EDID_QUIRK_PREFER_LARGE_60) 502 target_refresh = 60; 503 if (quirks & EDID_QUIRK_PREFER_LARGE_75) 504 target_refresh = 75; 505 506 preferred_mode = list_first_entry(&connector->probed_modes, 507 struct drm_display_mode, head); 508 509 list_for_each_entry_safe(cur_mode, t, &connector->probed_modes, head) { 510 cur_mode->type &= ~DRM_MODE_TYPE_PREFERRED; 511 512 if (cur_mode == preferred_mode) 513 continue; 514 515 /* Largest mode is preferred */ 516 if (MODE_SIZE(cur_mode) > MODE_SIZE(preferred_mode)) 517 preferred_mode = cur_mode; 518 519 /* At a given size, try to get closest to target refresh */ 520 if ((MODE_SIZE(cur_mode) == MODE_SIZE(preferred_mode)) && 521 MODE_REFRESH_DIFF(cur_mode, target_refresh) < 522 MODE_REFRESH_DIFF(preferred_mode, target_refresh)) { 523 preferred_mode = cur_mode; 524 } 525 } 526 527 preferred_mode->type |= DRM_MODE_TYPE_PREFERRED; 528 } 529 530 static bool 531 mode_is_rb(const struct drm_display_mode *mode) 532 { 533 return (mode->htotal - mode->hdisplay == 160) && 534 (mode->hsync_end - mode->hdisplay == 80) && 535 (mode->hsync_end - mode->hsync_start == 32) && 536 (mode->vsync_start - mode->vdisplay == 3); 537 } 538 539 /* 540 * drm_mode_find_dmt - Create a copy of a mode if present in DMT 541 * @dev: Device to duplicate against 542 * @hsize: Mode width 543 * @vsize: Mode height 544 * @fresh: Mode refresh rate 545 * @rb: Mode reduced-blanking-ness 546 * 547 * Walk the DMT mode list looking for a match for the given parameters. 548 * Return a newly allocated copy of the mode, or NULL if not found. 549 */ 550 struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev, 551 int hsize, int vsize, int fresh, 552 bool rb) 553 { 554 int i; 555 556 for (i = 0; i < drm_num_dmt_modes; i++) { 557 const struct drm_display_mode *ptr = &drm_dmt_modes[i]; 558 if (hsize != ptr->hdisplay) 559 continue; 560 if (vsize != ptr->vdisplay) 561 continue; 562 if (fresh != drm_mode_vrefresh(ptr)) 563 continue; 564 if (rb != mode_is_rb(ptr)) 565 continue; 566 567 return drm_mode_duplicate(dev, ptr); 568 } 569 570 return NULL; 571 } 572 EXPORT_SYMBOL(drm_mode_find_dmt); 573 574 typedef void detailed_cb(struct detailed_timing *timing, void *closure); 575 576 static void 577 cea_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure) 578 { 579 int i, n = 0; 580 u8 d = ext[0x02]; 581 u8 *det_base = ext + d; 582 583 n = (127 - d) / 18; 584 for (i = 0; i < n; i++) 585 cb((struct detailed_timing *)(det_base + 18 * i), closure); 586 } 587 588 static void 589 vtb_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure) 590 { 591 unsigned int i, n = min((int)ext[0x02], 6); 592 u8 *det_base = ext + 5; 593 594 if (ext[0x01] != 1) 595 return; /* unknown version */ 596 597 for (i = 0; i < n; i++) 598 cb((struct detailed_timing *)(det_base + 18 * i), closure); 599 } 600 601 static void 602 drm_for_each_detailed_block(u8 *raw_edid, detailed_cb *cb, void *closure) 603 { 604 int i; 605 struct edid *edid = (struct edid *)raw_edid; 606 607 if (edid == NULL) 608 return; 609 610 for (i = 0; i < EDID_DETAILED_TIMINGS; i++) 611 cb(&(edid->detailed_timings[i]), closure); 612 613 for (i = 1; i <= raw_edid[0x7e]; i++) { 614 u8 *ext = raw_edid + (i * EDID_LENGTH); 615 switch (*ext) { 616 case CEA_EXT: 617 cea_for_each_detailed_block(ext, cb, closure); 618 break; 619 case VTB_EXT: 620 vtb_for_each_detailed_block(ext, cb, closure); 621 break; 622 default: 623 break; 624 } 625 } 626 } 627 628 static void 629 is_rb(struct detailed_timing *t, void *data) 630 { 631 u8 *r = (u8 *)t; 632 if (r[3] == EDID_DETAIL_MONITOR_RANGE) 633 if (r[15] & 0x10) 634 *(bool *)data = true; 635 } 636 637 /* EDID 1.4 defines this explicitly. For EDID 1.3, we guess, badly. */ 638 static bool 639 drm_monitor_supports_rb(struct edid *edid) 640 { 641 if (edid->revision >= 4) { 642 bool ret = false; 643 drm_for_each_detailed_block((u8 *)edid, is_rb, &ret); 644 return ret; 645 } 646 647 return ((edid->input & DRM_EDID_INPUT_DIGITAL) != 0); 648 } 649 650 static void 651 find_gtf2(struct detailed_timing *t, void *data) 652 { 653 u8 *r = (u8 *)t; 654 if (r[3] == EDID_DETAIL_MONITOR_RANGE && r[10] == 0x02) 655 *(u8 **)data = r; 656 } 657 658 /* Secondary GTF curve kicks in above some break frequency */ 659 static int 660 drm_gtf2_hbreak(struct edid *edid) 661 { 662 u8 *r = NULL; 663 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); 664 return r ? (r[12] * 2) : 0; 665 } 666 667 static int 668 drm_gtf2_2c(struct edid *edid) 669 { 670 u8 *r = NULL; 671 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); 672 return r ? r[13] : 0; 673 } 674 675 static int 676 drm_gtf2_m(struct edid *edid) 677 { 678 u8 *r = NULL; 679 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); 680 return r ? (r[15] << 8) + r[14] : 0; 681 } 682 683 static int 684 drm_gtf2_k(struct edid *edid) 685 { 686 u8 *r = NULL; 687 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); 688 return r ? r[16] : 0; 689 } 690 691 static int 692 drm_gtf2_2j(struct edid *edid) 693 { 694 u8 *r = NULL; 695 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); 696 return r ? r[17] : 0; 697 } 698 699 /** 700 * standard_timing_level - get std. timing level(CVT/GTF/DMT) 701 * @edid: EDID block to scan 702 */ 703 static int standard_timing_level(struct edid *edid) 704 { 705 if (edid->revision >= 2) { 706 if (edid->revision >= 4 && (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF)) 707 return LEVEL_CVT; 708 if (drm_gtf2_hbreak(edid)) 709 return LEVEL_GTF2; 710 return LEVEL_GTF; 711 } 712 return LEVEL_DMT; 713 } 714 715 /* 716 * 0 is reserved. The spec says 0x01 fill for unused timings. Some old 717 * monitors fill with ascii space (0x20) instead. 718 */ 719 static int 720 bad_std_timing(u8 a, u8 b) 721 { 722 return (a == 0x00 && b == 0x00) || 723 (a == 0x01 && b == 0x01) || 724 (a == 0x20 && b == 0x20); 725 } 726 727 /** 728 * drm_mode_std - convert standard mode info (width, height, refresh) into mode 729 * @t: standard timing params 730 * @timing_level: standard timing level 731 * 732 * Take the standard timing params (in this case width, aspect, and refresh) 733 * and convert them into a real mode using CVT/GTF/DMT. 734 */ 735 static struct drm_display_mode * 736 drm_mode_std(struct drm_connector *connector, struct edid *edid, 737 struct std_timing *t, int revision) 738 { 739 struct drm_device *dev = connector->dev; 740 struct drm_display_mode *m, *mode = NULL; 741 int hsize, vsize; 742 int vrefresh_rate; 743 unsigned aspect_ratio = (t->vfreq_aspect & EDID_TIMING_ASPECT_MASK) 744 >> EDID_TIMING_ASPECT_SHIFT; 745 unsigned vfreq = (t->vfreq_aspect & EDID_TIMING_VFREQ_MASK) 746 >> EDID_TIMING_VFREQ_SHIFT; 747 int timing_level = standard_timing_level(edid); 748 749 if (bad_std_timing(t->hsize, t->vfreq_aspect)) 750 return NULL; 751 752 /* According to the EDID spec, the hdisplay = hsize * 8 + 248 */ 753 hsize = t->hsize * 8 + 248; 754 /* vrefresh_rate = vfreq + 60 */ 755 vrefresh_rate = vfreq + 60; 756 /* the vdisplay is calculated based on the aspect ratio */ 757 if (aspect_ratio == 0) { 758 if (revision < 3) 759 vsize = hsize; 760 else 761 vsize = (hsize * 10) / 16; 762 } else if (aspect_ratio == 1) 763 vsize = (hsize * 3) / 4; 764 else if (aspect_ratio == 2) 765 vsize = (hsize * 4) / 5; 766 else 767 vsize = (hsize * 9) / 16; 768 769 /* HDTV hack, part 1 */ 770 if (vrefresh_rate == 60 && 771 ((hsize == 1360 && vsize == 765) || 772 (hsize == 1368 && vsize == 769))) { 773 hsize = 1366; 774 vsize = 768; 775 } 776 777 /* 778 * If this connector already has a mode for this size and refresh 779 * rate (because it came from detailed or CVT info), use that 780 * instead. This way we don't have to guess at interlace or 781 * reduced blanking. 782 */ 783 list_for_each_entry(m, &connector->probed_modes, head) 784 if (m->hdisplay == hsize && m->vdisplay == vsize && 785 drm_mode_vrefresh(m) == vrefresh_rate) 786 return NULL; 787 788 /* HDTV hack, part 2 */ 789 if (hsize == 1366 && vsize == 768 && vrefresh_rate == 60) { 790 mode = drm_cvt_mode(dev, 1366, 768, vrefresh_rate, 0, 0, 791 false); 792 mode->hdisplay = 1366; 793 mode->hsync_start = mode->hsync_start - 1; 794 mode->hsync_end = mode->hsync_end - 1; 795 return mode; 796 } 797 798 /* check whether it can be found in default mode table */ 799 if (drm_monitor_supports_rb(edid)) { 800 mode = drm_mode_find_dmt(dev, hsize, vsize, vrefresh_rate, 801 true); 802 if (mode) 803 return mode; 804 } 805 mode = drm_mode_find_dmt(dev, hsize, vsize, vrefresh_rate, false); 806 if (mode) 807 return mode; 808 809 /* okay, generate it */ 810 switch (timing_level) { 811 case LEVEL_DMT: 812 break; 813 case LEVEL_GTF: 814 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0); 815 break; 816 case LEVEL_GTF2: 817 /* 818 * This is potentially wrong if there's ever a monitor with 819 * more than one ranges section, each claiming a different 820 * secondary GTF curve. Please don't do that. 821 */ 822 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0); 823 if (!mode) 824 return NULL; 825 if (drm_mode_hsync(mode) > drm_gtf2_hbreak(edid)) { 826 drm_mode_destroy(dev, mode); 827 mode = drm_gtf_mode_complex(dev, hsize, vsize, 828 vrefresh_rate, 0, 0, 829 drm_gtf2_m(edid), 830 drm_gtf2_2c(edid), 831 drm_gtf2_k(edid), 832 drm_gtf2_2j(edid)); 833 } 834 break; 835 case LEVEL_CVT: 836 mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0, 837 false); 838 break; 839 } 840 return mode; 841 } 842 843 /* 844 * EDID is delightfully ambiguous about how interlaced modes are to be 845 * encoded. Our internal representation is of frame height, but some 846 * HDTV detailed timings are encoded as field height. 847 * 848 * The format list here is from CEA, in frame size. Technically we 849 * should be checking refresh rate too. Whatever. 850 */ 851 static void 852 drm_mode_do_interlace_quirk(struct drm_display_mode *mode, 853 struct detailed_pixel_timing *pt) 854 { 855 int i; 856 static const struct { 857 int w, h; 858 } cea_interlaced[] = { 859 { 1920, 1080 }, 860 { 720, 480 }, 861 { 1440, 480 }, 862 { 2880, 480 }, 863 { 720, 576 }, 864 { 1440, 576 }, 865 { 2880, 576 }, 866 }; 867 868 if (!(pt->misc & DRM_EDID_PT_INTERLACED)) 869 return; 870 871 for (i = 0; i < ARRAY_SIZE(cea_interlaced); i++) { 872 if ((mode->hdisplay == cea_interlaced[i].w) && 873 (mode->vdisplay == cea_interlaced[i].h / 2)) { 874 mode->vdisplay *= 2; 875 mode->vsync_start *= 2; 876 mode->vsync_end *= 2; 877 mode->vtotal *= 2; 878 mode->vtotal |= 1; 879 } 880 } 881 882 mode->flags |= DRM_MODE_FLAG_INTERLACE; 883 } 884 885 /** 886 * drm_mode_detailed - create a new mode from an EDID detailed timing section 887 * @dev: DRM device (needed to create new mode) 888 * @edid: EDID block 889 * @timing: EDID detailed timing info 890 * @quirks: quirks to apply 891 * 892 * An EDID detailed timing block contains enough info for us to create and 893 * return a new struct drm_display_mode. 894 */ 895 static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev, 896 struct edid *edid, 897 struct detailed_timing *timing, 898 u32 quirks) 899 { 900 struct drm_display_mode *mode; 901 struct detailed_pixel_timing *pt = &timing->data.pixel_data; 902 unsigned hactive = (pt->hactive_hblank_hi & 0xf0) << 4 | pt->hactive_lo; 903 unsigned vactive = (pt->vactive_vblank_hi & 0xf0) << 4 | pt->vactive_lo; 904 unsigned hblank = (pt->hactive_hblank_hi & 0xf) << 8 | pt->hblank_lo; 905 unsigned vblank = (pt->vactive_vblank_hi & 0xf) << 8 | pt->vblank_lo; 906 unsigned hsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc0) << 2 | pt->hsync_offset_lo; 907 unsigned hsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x30) << 4 | pt->hsync_pulse_width_lo; 908 unsigned vsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc) >> 2 | pt->vsync_offset_pulse_width_lo >> 4; 909 unsigned vsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x3) << 4 | (pt->vsync_offset_pulse_width_lo & 0xf); 910 911 /* ignore tiny modes */ 912 if (hactive < 64 || vactive < 64) 913 return NULL; 914 915 if (pt->misc & DRM_EDID_PT_STEREO) { 916 kprintf("stereo mode not supported\n"); 917 return NULL; 918 } 919 if (!(pt->misc & DRM_EDID_PT_SEPARATE_SYNC)) { 920 kprintf("composite sync not supported\n"); 921 } 922 923 /* it is incorrect if hsync/vsync width is zero */ 924 if (!hsync_pulse_width || !vsync_pulse_width) { 925 DRM_DEBUG_KMS("Incorrect Detailed timing. " 926 "Wrong Hsync/Vsync pulse width\n"); 927 return NULL; 928 } 929 930 if (quirks & EDID_QUIRK_FORCE_REDUCED_BLANKING) { 931 mode = drm_cvt_mode(dev, hactive, vactive, 60, true, false, false); 932 if (!mode) 933 return NULL; 934 935 goto set_size; 936 } 937 938 mode = drm_mode_create(dev); 939 if (!mode) 940 return NULL; 941 942 if (quirks & EDID_QUIRK_135_CLOCK_TOO_HIGH) 943 timing->pixel_clock = cpu_to_le16(1088); 944 945 mode->clock = le16_to_cpu(timing->pixel_clock) * 10; 946 947 mode->hdisplay = hactive; 948 mode->hsync_start = mode->hdisplay + hsync_offset; 949 mode->hsync_end = mode->hsync_start + hsync_pulse_width; 950 mode->htotal = mode->hdisplay + hblank; 951 952 mode->vdisplay = vactive; 953 mode->vsync_start = mode->vdisplay + vsync_offset; 954 mode->vsync_end = mode->vsync_start + vsync_pulse_width; 955 mode->vtotal = mode->vdisplay + vblank; 956 957 /* Some EDIDs have bogus h/vtotal values */ 958 if (mode->hsync_end > mode->htotal) 959 mode->htotal = mode->hsync_end + 1; 960 if (mode->vsync_end > mode->vtotal) 961 mode->vtotal = mode->vsync_end + 1; 962 963 drm_mode_do_interlace_quirk(mode, pt); 964 965 if (quirks & EDID_QUIRK_DETAILED_SYNC_PP) { 966 pt->misc |= DRM_EDID_PT_HSYNC_POSITIVE | DRM_EDID_PT_VSYNC_POSITIVE; 967 } 968 969 mode->flags |= (pt->misc & DRM_EDID_PT_HSYNC_POSITIVE) ? 970 DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC; 971 mode->flags |= (pt->misc & DRM_EDID_PT_VSYNC_POSITIVE) ? 972 DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC; 973 974 set_size: 975 mode->width_mm = pt->width_mm_lo | (pt->width_height_mm_hi & 0xf0) << 4; 976 mode->height_mm = pt->height_mm_lo | (pt->width_height_mm_hi & 0xf) << 8; 977 978 if (quirks & EDID_QUIRK_DETAILED_IN_CM) { 979 mode->width_mm *= 10; 980 mode->height_mm *= 10; 981 } 982 983 if (quirks & EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE) { 984 mode->width_mm = edid->width_cm * 10; 985 mode->height_mm = edid->height_cm * 10; 986 } 987 988 mode->type = DRM_MODE_TYPE_DRIVER; 989 drm_mode_set_name(mode); 990 991 return mode; 992 } 993 994 static bool 995 mode_in_hsync_range(const struct drm_display_mode *mode, 996 struct edid *edid, u8 *t) 997 { 998 int hsync, hmin, hmax; 999 1000 hmin = t[7]; 1001 if (edid->revision >= 4) 1002 hmin += ((t[4] & 0x04) ? 255 : 0); 1003 hmax = t[8]; 1004 if (edid->revision >= 4) 1005 hmax += ((t[4] & 0x08) ? 255 : 0); 1006 hsync = drm_mode_hsync(mode); 1007 1008 return (hsync <= hmax && hsync >= hmin); 1009 } 1010 1011 static bool 1012 mode_in_vsync_range(const struct drm_display_mode *mode, 1013 struct edid *edid, u8 *t) 1014 { 1015 int vsync, vmin, vmax; 1016 1017 vmin = t[5]; 1018 if (edid->revision >= 4) 1019 vmin += ((t[4] & 0x01) ? 255 : 0); 1020 vmax = t[6]; 1021 if (edid->revision >= 4) 1022 vmax += ((t[4] & 0x02) ? 255 : 0); 1023 vsync = drm_mode_vrefresh(mode); 1024 1025 return (vsync <= vmax && vsync >= vmin); 1026 } 1027 1028 static u32 1029 range_pixel_clock(struct edid *edid, u8 *t) 1030 { 1031 /* unspecified */ 1032 if (t[9] == 0 || t[9] == 255) 1033 return 0; 1034 1035 /* 1.4 with CVT support gives us real precision, yay */ 1036 if (edid->revision >= 4 && t[10] == 0x04) 1037 return (t[9] * 10000) - ((t[12] >> 2) * 250); 1038 1039 /* 1.3 is pathetic, so fuzz up a bit */ 1040 return t[9] * 10000 + 5001; 1041 } 1042 1043 static bool 1044 mode_in_range(const struct drm_display_mode *mode, struct edid *edid, 1045 struct detailed_timing *timing) 1046 { 1047 u32 max_clock; 1048 u8 *t = (u8 *)timing; 1049 1050 if (!mode_in_hsync_range(mode, edid, t)) 1051 return false; 1052 1053 if (!mode_in_vsync_range(mode, edid, t)) 1054 return false; 1055 1056 if ((max_clock = range_pixel_clock(edid, t))) 1057 if (mode->clock > max_clock) 1058 return false; 1059 1060 /* 1.4 max horizontal check */ 1061 if (edid->revision >= 4 && t[10] == 0x04) 1062 if (t[13] && mode->hdisplay > 8 * (t[13] + (256 * (t[12]&0x3)))) 1063 return false; 1064 1065 if (mode_is_rb(mode) && !drm_monitor_supports_rb(edid)) 1066 return false; 1067 1068 return true; 1069 } 1070 1071 static bool valid_inferred_mode(const struct drm_connector *connector, 1072 const struct drm_display_mode *mode) 1073 { 1074 struct drm_display_mode *m; 1075 bool ok = false; 1076 1077 list_for_each_entry(m, &connector->probed_modes, head) { 1078 if (mode->hdisplay == m->hdisplay && 1079 mode->vdisplay == m->vdisplay && 1080 drm_mode_vrefresh(mode) == drm_mode_vrefresh(m)) 1081 return false; /* duplicated */ 1082 if (mode->hdisplay <= m->hdisplay && 1083 mode->vdisplay <= m->vdisplay) 1084 ok = true; 1085 } 1086 return ok; 1087 } 1088 1089 static int 1090 drm_dmt_modes_for_range(struct drm_connector *connector, struct edid *edid, 1091 struct detailed_timing *timing) 1092 { 1093 int i, modes = 0; 1094 struct drm_display_mode *newmode; 1095 struct drm_device *dev = connector->dev; 1096 1097 for (i = 0; i < drm_num_dmt_modes; i++) { 1098 if (mode_in_range(drm_dmt_modes + i, edid, timing) && 1099 valid_inferred_mode(connector, drm_dmt_modes + i)) { 1100 newmode = drm_mode_duplicate(dev, &drm_dmt_modes[i]); 1101 if (newmode) { 1102 drm_mode_probed_add(connector, newmode); 1103 modes++; 1104 } 1105 } 1106 } 1107 1108 return modes; 1109 } 1110 1111 /* fix up 1366x768 mode from 1368x768; 1112 * GFT/CVT can't express 1366 width which isn't dividable by 8 1113 */ 1114 static void fixup_mode_1366x768(struct drm_display_mode *mode) 1115 { 1116 if (mode->hdisplay == 1368 && mode->vdisplay == 768) { 1117 mode->hdisplay = 1366; 1118 mode->hsync_start--; 1119 mode->hsync_end--; 1120 drm_mode_set_name(mode); 1121 } 1122 } 1123 1124 static int 1125 drm_gtf_modes_for_range(struct drm_connector *connector, struct edid *edid, 1126 struct detailed_timing *timing) 1127 { 1128 int i, modes = 0; 1129 struct drm_display_mode *newmode; 1130 struct drm_device *dev = connector->dev; 1131 1132 for (i = 0; i < num_extra_modes; i++) { 1133 const struct minimode *m = &extra_modes[i]; 1134 newmode = drm_gtf_mode(dev, m->w, m->h, m->r, 0, 0); 1135 if (!newmode) 1136 return modes; 1137 1138 fixup_mode_1366x768(newmode); 1139 if (!mode_in_range(newmode, edid, timing) || 1140 !valid_inferred_mode(connector, newmode)) { 1141 drm_mode_destroy(dev, newmode); 1142 continue; 1143 } 1144 1145 drm_mode_probed_add(connector, newmode); 1146 modes++; 1147 } 1148 1149 return modes; 1150 } 1151 1152 static int 1153 drm_cvt_modes_for_range(struct drm_connector *connector, struct edid *edid, 1154 struct detailed_timing *timing) 1155 { 1156 int i, modes = 0; 1157 struct drm_display_mode *newmode; 1158 struct drm_device *dev = connector->dev; 1159 bool rb = drm_monitor_supports_rb(edid); 1160 1161 for (i = 0; i < num_extra_modes; i++) { 1162 const struct minimode *m = &extra_modes[i]; 1163 newmode = drm_cvt_mode(dev, m->w, m->h, m->r, rb, 0, 0); 1164 if (!newmode) 1165 return modes; 1166 1167 fixup_mode_1366x768(newmode); 1168 if (!mode_in_range(newmode, edid, timing) || 1169 !valid_inferred_mode(connector, newmode)) { 1170 drm_mode_destroy(dev, newmode); 1171 continue; 1172 } 1173 1174 drm_mode_probed_add(connector, newmode); 1175 modes++; 1176 } 1177 1178 return modes; 1179 } 1180 1181 static void 1182 do_inferred_modes(struct detailed_timing *timing, void *c) 1183 { 1184 struct detailed_mode_closure *closure = c; 1185 struct detailed_non_pixel *data = &timing->data.other_data; 1186 struct detailed_data_monitor_range *range = &data->data.range; 1187 1188 if (data->type != EDID_DETAIL_MONITOR_RANGE) 1189 return; 1190 1191 closure->modes += drm_dmt_modes_for_range(closure->connector, 1192 closure->edid, 1193 timing); 1194 1195 if (!version_greater(closure->edid, 1, 1)) 1196 return; /* GTF not defined yet */ 1197 1198 switch (range->flags) { 1199 case 0x02: /* secondary gtf, XXX could do more */ 1200 case 0x00: /* default gtf */ 1201 closure->modes += drm_gtf_modes_for_range(closure->connector, 1202 closure->edid, 1203 timing); 1204 break; 1205 case 0x04: /* cvt, only in 1.4+ */ 1206 if (!version_greater(closure->edid, 1, 3)) 1207 break; 1208 1209 closure->modes += drm_cvt_modes_for_range(closure->connector, 1210 closure->edid, 1211 timing); 1212 break; 1213 case 0x01: /* just the ranges, no formula */ 1214 default: 1215 break; 1216 } 1217 } 1218 1219 static int 1220 add_inferred_modes(struct drm_connector *connector, struct edid *edid) 1221 { 1222 struct detailed_mode_closure closure = { 1223 connector, edid, 0, 0, 0 1224 }; 1225 1226 if (version_greater(edid, 1, 0)) 1227 drm_for_each_detailed_block((u8 *)edid, do_inferred_modes, 1228 &closure); 1229 1230 return closure.modes; 1231 } 1232 1233 static int 1234 drm_est3_modes(struct drm_connector *connector, struct detailed_timing *timing) 1235 { 1236 int i, j, m, modes = 0; 1237 struct drm_display_mode *mode; 1238 u8 *est = ((u8 *)timing) + 5; 1239 1240 for (i = 0; i < 6; i++) { 1241 for (j = 7; j > 0; j--) { 1242 m = (i * 8) + (7 - j); 1243 if (m >= ARRAY_SIZE(est3_modes)) 1244 break; 1245 if (est[i] & (1 << j)) { 1246 mode = drm_mode_find_dmt(connector->dev, 1247 est3_modes[m].w, 1248 est3_modes[m].h, 1249 est3_modes[m].r, 1250 est3_modes[m].rb); 1251 if (mode) { 1252 drm_mode_probed_add(connector, mode); 1253 modes++; 1254 } 1255 } 1256 } 1257 } 1258 1259 return modes; 1260 } 1261 1262 static void 1263 do_established_modes(struct detailed_timing *timing, void *c) 1264 { 1265 struct detailed_mode_closure *closure = c; 1266 struct detailed_non_pixel *data = &timing->data.other_data; 1267 1268 if (data->type == EDID_DETAIL_EST_TIMINGS) 1269 closure->modes += drm_est3_modes(closure->connector, timing); 1270 } 1271 1272 /** 1273 * add_established_modes - get est. modes from EDID and add them 1274 * @edid: EDID block to scan 1275 * 1276 * Each EDID block contains a bitmap of the supported "established modes" list 1277 * (defined above). Tease them out and add them to the global modes list. 1278 */ 1279 static int 1280 add_established_modes(struct drm_connector *connector, struct edid *edid) 1281 { 1282 struct drm_device *dev = connector->dev; 1283 unsigned long est_bits = edid->established_timings.t1 | 1284 (edid->established_timings.t2 << 8) | 1285 ((edid->established_timings.mfg_rsvd & 0x80) << 9); 1286 int i, modes = 0; 1287 struct detailed_mode_closure closure = { 1288 connector, edid, 0, 0, 0 1289 }; 1290 1291 for (i = 0; i <= EDID_EST_TIMINGS; i++) { 1292 if (est_bits & (1<<i)) { 1293 struct drm_display_mode *newmode; 1294 newmode = drm_mode_duplicate(dev, &edid_est_modes[i]); 1295 if (newmode) { 1296 drm_mode_probed_add(connector, newmode); 1297 modes++; 1298 } 1299 } 1300 } 1301 1302 if (version_greater(edid, 1, 0)) 1303 drm_for_each_detailed_block((u8 *)edid, 1304 do_established_modes, &closure); 1305 1306 return modes + closure.modes; 1307 } 1308 1309 static void 1310 do_standard_modes(struct detailed_timing *timing, void *c) 1311 { 1312 struct detailed_mode_closure *closure = c; 1313 struct detailed_non_pixel *data = &timing->data.other_data; 1314 struct drm_connector *connector = closure->connector; 1315 struct edid *edid = closure->edid; 1316 1317 if (data->type == EDID_DETAIL_STD_MODES) { 1318 int i; 1319 for (i = 0; i < 6; i++) { 1320 struct std_timing *std; 1321 struct drm_display_mode *newmode; 1322 1323 std = &data->data.timings[i]; 1324 newmode = drm_mode_std(connector, edid, std, 1325 edid->revision); 1326 if (newmode) { 1327 drm_mode_probed_add(connector, newmode); 1328 closure->modes++; 1329 } 1330 } 1331 } 1332 } 1333 1334 /** 1335 * add_standard_modes - get std. modes from EDID and add them 1336 * @edid: EDID block to scan 1337 * 1338 * Standard modes can be calculated using the appropriate standard (DMT, 1339 * GTF or CVT. Grab them from @edid and add them to the list. 1340 */ 1341 static int 1342 add_standard_modes(struct drm_connector *connector, struct edid *edid) 1343 { 1344 int i, modes = 0; 1345 struct detailed_mode_closure closure = { 1346 connector, edid, 0, 0, 0 1347 }; 1348 1349 for (i = 0; i < EDID_STD_TIMINGS; i++) { 1350 struct drm_display_mode *newmode; 1351 1352 newmode = drm_mode_std(connector, edid, 1353 &edid->standard_timings[i], 1354 edid->revision); 1355 if (newmode) { 1356 drm_mode_probed_add(connector, newmode); 1357 modes++; 1358 } 1359 } 1360 1361 if (version_greater(edid, 1, 0)) 1362 drm_for_each_detailed_block((u8 *)edid, do_standard_modes, 1363 &closure); 1364 1365 /* XXX should also look for standard codes in VTB blocks */ 1366 1367 return modes + closure.modes; 1368 } 1369 1370 static int drm_cvt_modes(struct drm_connector *connector, 1371 struct detailed_timing *timing) 1372 { 1373 int i, j, modes = 0; 1374 struct drm_display_mode *newmode; 1375 struct drm_device *dev = connector->dev; 1376 struct cvt_timing *cvt; 1377 const int rates[] = { 60, 85, 75, 60, 50 }; 1378 const u8 empty[3] = { 0, 0, 0 }; 1379 1380 for (i = 0; i < 4; i++) { 1381 int width = 0, height; 1382 cvt = &(timing->data.other_data.data.cvt[i]); 1383 1384 if (!memcmp(cvt->code, empty, 3)) 1385 continue; 1386 1387 height = (cvt->code[0] + ((cvt->code[1] & 0xf0) << 4) + 1) * 2; 1388 switch (cvt->code[1] & 0x0c) { 1389 case 0x00: 1390 width = height * 4 / 3; 1391 break; 1392 case 0x04: 1393 width = height * 16 / 9; 1394 break; 1395 case 0x08: 1396 width = height * 16 / 10; 1397 break; 1398 case 0x0c: 1399 width = height * 15 / 9; 1400 break; 1401 } 1402 1403 for (j = 1; j < 5; j++) { 1404 if (cvt->code[2] & (1 << j)) { 1405 newmode = drm_cvt_mode(dev, width, height, 1406 rates[j], j == 0, 1407 false, false); 1408 if (newmode) { 1409 drm_mode_probed_add(connector, newmode); 1410 modes++; 1411 } 1412 } 1413 } 1414 } 1415 1416 return modes; 1417 } 1418 1419 static void 1420 do_cvt_mode(struct detailed_timing *timing, void *c) 1421 { 1422 struct detailed_mode_closure *closure = c; 1423 struct detailed_non_pixel *data = &timing->data.other_data; 1424 1425 if (data->type == EDID_DETAIL_CVT_3BYTE) 1426 closure->modes += drm_cvt_modes(closure->connector, timing); 1427 } 1428 1429 static int 1430 add_cvt_modes(struct drm_connector *connector, struct edid *edid) 1431 { 1432 struct detailed_mode_closure closure = { 1433 connector, edid, 0, 0, 0 1434 }; 1435 1436 if (version_greater(edid, 1, 2)) 1437 drm_for_each_detailed_block((u8 *)edid, do_cvt_mode, &closure); 1438 1439 /* XXX should also look for CVT codes in VTB blocks */ 1440 1441 return closure.modes; 1442 } 1443 1444 static void 1445 do_detailed_mode(struct detailed_timing *timing, void *c) 1446 { 1447 struct detailed_mode_closure *closure = c; 1448 struct drm_display_mode *newmode; 1449 1450 if (timing->pixel_clock) { 1451 newmode = drm_mode_detailed(closure->connector->dev, 1452 closure->edid, timing, 1453 closure->quirks); 1454 if (!newmode) 1455 return; 1456 1457 if (closure->preferred) 1458 newmode->type |= DRM_MODE_TYPE_PREFERRED; 1459 1460 drm_mode_probed_add(closure->connector, newmode); 1461 closure->modes++; 1462 closure->preferred = 0; 1463 } 1464 } 1465 1466 /* 1467 * add_detailed_modes - Add modes from detailed timings 1468 * @connector: attached connector 1469 * @edid: EDID block to scan 1470 * @quirks: quirks to apply 1471 */ 1472 static int 1473 add_detailed_modes(struct drm_connector *connector, struct edid *edid, 1474 u32 quirks) 1475 { 1476 struct detailed_mode_closure closure = { 1477 connector, 1478 edid, 1479 1, 1480 quirks, 1481 0 1482 }; 1483 1484 if (closure.preferred && !version_greater(edid, 1, 3)) 1485 closure.preferred = 1486 (edid->features & DRM_EDID_FEATURE_PREFERRED_TIMING); 1487 1488 drm_for_each_detailed_block((u8 *)edid, do_detailed_mode, &closure); 1489 1490 return closure.modes; 1491 } 1492 1493 #define HDMI_IDENTIFIER 0x000C03 1494 #define AUDIO_BLOCK 0x01 1495 #define VIDEO_BLOCK 0x02 1496 #define VENDOR_BLOCK 0x03 1497 #define SPEAKER_BLOCK 0x04 1498 #define VIDEO_CAPABILITY_BLOCK 0x07 1499 #define EDID_BASIC_AUDIO (1 << 6) 1500 #define EDID_CEA_YCRCB444 (1 << 5) 1501 #define EDID_CEA_YCRCB422 (1 << 4) 1502 #define EDID_CEA_VCDB_QS (1 << 6) 1503 1504 /** 1505 * Search EDID for CEA extension block. 1506 */ 1507 u8 *drm_find_cea_extension(struct edid *edid) 1508 { 1509 u8 *edid_ext = NULL; 1510 int i; 1511 1512 /* No EDID or EDID extensions */ 1513 if (edid == NULL || edid->extensions == 0) 1514 return NULL; 1515 1516 /* Find CEA extension */ 1517 for (i = 0; i < edid->extensions; i++) { 1518 edid_ext = (u8 *)edid + EDID_LENGTH * (i + 1); 1519 if (edid_ext[0] == CEA_EXT) 1520 break; 1521 } 1522 1523 if (i == edid->extensions) 1524 return NULL; 1525 1526 return edid_ext; 1527 } 1528 EXPORT_SYMBOL(drm_find_cea_extension); 1529 1530 /* 1531 * Looks for a CEA mode matching given drm_display_mode. 1532 * Returns its CEA Video ID code, or 0 if not found. 1533 */ 1534 u8 drm_match_cea_mode(const struct drm_display_mode *to_match) 1535 { 1536 u8 mode; 1537 1538 for (mode = 0; mode < drm_num_cea_modes; mode++) { 1539 const struct drm_display_mode *cea_mode = &edid_cea_modes[mode]; 1540 1541 if (drm_mode_equal(to_match, cea_mode)) 1542 return mode + 1; 1543 } 1544 return 0; 1545 } 1546 EXPORT_SYMBOL(drm_match_cea_mode); 1547 1548 1549 static int 1550 do_cea_modes (struct drm_connector *connector, u8 *db, u8 len) 1551 { 1552 struct drm_device *dev = connector->dev; 1553 u8 * mode, cea_mode; 1554 int modes = 0; 1555 1556 for (mode = db; mode < db + len; mode++) { 1557 cea_mode = (*mode & 127) - 1; /* CEA modes are numbered 1..127 */ 1558 if (cea_mode < drm_num_cea_modes) { 1559 struct drm_display_mode *newmode; 1560 newmode = drm_mode_duplicate(dev, 1561 &edid_cea_modes[cea_mode]); 1562 if (newmode) { 1563 drm_mode_probed_add(connector, newmode); 1564 modes++; 1565 } 1566 } 1567 } 1568 1569 return modes; 1570 } 1571 1572 static int 1573 cea_db_payload_len(const u8 *db) 1574 { 1575 return db[0] & 0x1f; 1576 } 1577 1578 static int 1579 cea_db_tag(const u8 *db) 1580 { 1581 return db[0] >> 5; 1582 } 1583 1584 static int 1585 cea_revision(const u8 *cea) 1586 { 1587 return cea[1]; 1588 } 1589 1590 static int 1591 cea_db_offsets(const u8 *cea, int *start, int *end) 1592 { 1593 /* Data block offset in CEA extension block */ 1594 *start = 4; 1595 *end = cea[2]; 1596 if (*end == 0) 1597 *end = 127; 1598 if (*end < 4 || *end > 127) 1599 return -ERANGE; 1600 return 0; 1601 } 1602 1603 #define for_each_cea_db(cea, i, start, end) \ 1604 for ((i) = (start); (i) < (end) && (i) + cea_db_payload_len(&(cea)[(i)]) < (end); (i) += cea_db_payload_len(&(cea)[(i)]) + 1) 1605 1606 static int 1607 add_cea_modes(struct drm_connector *connector, struct edid *edid) 1608 { 1609 u8 * cea = drm_find_cea_extension(edid); 1610 u8 * db, dbl; 1611 int modes = 0; 1612 1613 if (cea && cea_revision(cea) >= 3) { 1614 int i, start, end; 1615 1616 if (cea_db_offsets(cea, &start, &end)) 1617 return 0; 1618 1619 for_each_cea_db(cea, i, start, end) { 1620 db = &cea[i]; 1621 dbl = cea_db_payload_len(db); 1622 1623 if (cea_db_tag(db) == VIDEO_BLOCK) 1624 modes += do_cea_modes (connector, db+1, dbl); 1625 } 1626 } 1627 1628 return modes; 1629 } 1630 1631 static void 1632 parse_hdmi_vsdb(struct drm_connector *connector, const u8 *db) 1633 { 1634 u8 len = cea_db_payload_len(db); 1635 1636 if (len >= 6) { 1637 connector->eld[5] |= (db[6] >> 7) << 1; /* Supports_AI */ 1638 connector->dvi_dual = db[6] & 1; 1639 } 1640 if (len >= 7) 1641 connector->max_tmds_clock = db[7] * 5; 1642 if (len >= 8) { 1643 connector->latency_present[0] = db[8] >> 7; 1644 connector->latency_present[1] = (db[8] >> 6) & 1; 1645 } 1646 if (len >= 9) 1647 connector->video_latency[0] = db[9]; 1648 if (len >= 10) 1649 connector->audio_latency[0] = db[10]; 1650 if (len >= 11) 1651 connector->video_latency[1] = db[11]; 1652 if (len >= 12) 1653 connector->audio_latency[1] = db[12]; 1654 1655 DRM_DEBUG_KMS("HDMI: DVI dual %d, " 1656 "max TMDS clock %d, " 1657 "latency present %d %d, " 1658 "video latency %d %d, " 1659 "audio latency %d %d\n", 1660 connector->dvi_dual, 1661 connector->max_tmds_clock, 1662 (int) connector->latency_present[0], 1663 (int) connector->latency_present[1], 1664 connector->video_latency[0], 1665 connector->video_latency[1], 1666 connector->audio_latency[0], 1667 connector->audio_latency[1]); 1668 } 1669 1670 static void 1671 monitor_name(struct detailed_timing *t, void *data) 1672 { 1673 if (t->data.other_data.type == EDID_DETAIL_MONITOR_NAME) 1674 *(u8 **)data = t->data.other_data.data.str.str; 1675 } 1676 1677 static bool cea_db_is_hdmi_vsdb(const u8 *db) 1678 { 1679 int hdmi_id; 1680 1681 if (cea_db_tag(db) != VENDOR_BLOCK) 1682 return false; 1683 1684 if (cea_db_payload_len(db) < 5) 1685 return false; 1686 1687 hdmi_id = db[1] | (db[2] << 8) | (db[3] << 16); 1688 1689 return hdmi_id == HDMI_IDENTIFIER; 1690 } 1691 1692 /** 1693 * drm_edid_to_eld - build ELD from EDID 1694 * @connector: connector corresponding to the HDMI/DP sink 1695 * @edid: EDID to parse 1696 * 1697 * Fill the ELD (EDID-Like Data) buffer for passing to the audio driver. 1698 * Some ELD fields are left to the graphics driver caller: 1699 * - Conn_Type 1700 * - HDCP 1701 * - Port_ID 1702 */ 1703 void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid) 1704 { 1705 uint8_t *eld = connector->eld; 1706 u8 *cea; 1707 u8 *name; 1708 u8 *db; 1709 int sad_count = 0; 1710 int mnl; 1711 int dbl; 1712 1713 memset(eld, 0, sizeof(connector->eld)); 1714 1715 cea = drm_find_cea_extension(edid); 1716 if (!cea) { 1717 DRM_DEBUG_KMS("ELD: no CEA Extension found\n"); 1718 return; 1719 } 1720 1721 name = NULL; 1722 drm_for_each_detailed_block((u8 *)edid, monitor_name, &name); 1723 for (mnl = 0; name && mnl < 13; mnl++) { 1724 if (name[mnl] == 0x0a) 1725 break; 1726 eld[20 + mnl] = name[mnl]; 1727 } 1728 eld[4] = (cea[1] << 5) | mnl; 1729 DRM_DEBUG_KMS("ELD monitor %s\n", eld + 20); 1730 1731 eld[0] = 2 << 3; /* ELD version: 2 */ 1732 1733 eld[16] = edid->mfg_id[0]; 1734 eld[17] = edid->mfg_id[1]; 1735 eld[18] = edid->prod_code[0]; 1736 eld[19] = edid->prod_code[1]; 1737 1738 if (cea_revision(cea) >= 3) { 1739 int i, start, end; 1740 1741 if (cea_db_offsets(cea, &start, &end)) { 1742 start = 0; 1743 end = 0; 1744 } 1745 1746 for_each_cea_db(cea, i, start, end) { 1747 db = &cea[i]; 1748 dbl = cea_db_payload_len(db); 1749 1750 switch (cea_db_tag(db)) { 1751 case AUDIO_BLOCK: 1752 /* Audio Data Block, contains SADs */ 1753 sad_count = dbl / 3; 1754 if (dbl >= 1) 1755 memcpy(eld + 20 + mnl, &db[1], dbl); 1756 break; 1757 case SPEAKER_BLOCK: 1758 /* Speaker Allocation Data Block */ 1759 if (dbl >= 1) 1760 eld[7] = db[1]; 1761 break; 1762 case VENDOR_BLOCK: 1763 /* HDMI Vendor-Specific Data Block */ 1764 if (cea_db_is_hdmi_vsdb(db)) 1765 parse_hdmi_vsdb(connector, db); 1766 break; 1767 default: 1768 break; 1769 } 1770 } 1771 } 1772 eld[5] |= sad_count << 4; 1773 eld[2] = (20 + mnl + sad_count * 3 + 3) / 4; 1774 1775 DRM_DEBUG_KMS("ELD size %d, SAD count %d\n", (int)eld[2], sad_count); 1776 } 1777 EXPORT_SYMBOL(drm_edid_to_eld); 1778 1779 /** 1780 * drm_av_sync_delay - HDMI/DP sink audio-video sync delay in millisecond 1781 * @connector: connector associated with the HDMI/DP sink 1782 * @mode: the display mode 1783 */ 1784 int drm_av_sync_delay(struct drm_connector *connector, 1785 struct drm_display_mode *mode) 1786 { 1787 int i = !!(mode->flags & DRM_MODE_FLAG_INTERLACE); 1788 int a, v; 1789 1790 if (!connector->latency_present[0]) 1791 return 0; 1792 if (!connector->latency_present[1]) 1793 i = 0; 1794 1795 a = connector->audio_latency[i]; 1796 v = connector->video_latency[i]; 1797 1798 /* 1799 * HDMI/DP sink doesn't support audio or video? 1800 */ 1801 if (a == 255 || v == 255) 1802 return 0; 1803 1804 /* 1805 * Convert raw EDID values to millisecond. 1806 * Treat unknown latency as 0ms. 1807 */ 1808 if (a) 1809 a = min(2 * (a - 1), 500); 1810 if (v) 1811 v = min(2 * (v - 1), 500); 1812 1813 return max(v - a, 0); 1814 } 1815 EXPORT_SYMBOL(drm_av_sync_delay); 1816 1817 /** 1818 * drm_select_eld - select one ELD from multiple HDMI/DP sinks 1819 * @encoder: the encoder just changed display mode 1820 * @mode: the adjusted display mode 1821 * 1822 * It's possible for one encoder to be associated with multiple HDMI/DP sinks. 1823 * The policy is now hard coded to simply use the first HDMI/DP sink's ELD. 1824 */ 1825 struct drm_connector *drm_select_eld(struct drm_encoder *encoder, 1826 struct drm_display_mode *mode) 1827 { 1828 struct drm_connector *connector; 1829 struct drm_device *dev = encoder->dev; 1830 1831 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 1832 if (connector->encoder == encoder && connector->eld[0]) 1833 return connector; 1834 1835 return NULL; 1836 } 1837 EXPORT_SYMBOL(drm_select_eld); 1838 1839 /** 1840 * drm_detect_hdmi_monitor - detect whether monitor is hdmi. 1841 * @edid: monitor EDID information 1842 * 1843 * Parse the CEA extension according to CEA-861-B. 1844 * Return true if HDMI, false if not or unknown. 1845 */ 1846 bool drm_detect_hdmi_monitor(struct edid *edid) 1847 { 1848 u8 *edid_ext; 1849 int i; 1850 int start_offset, end_offset; 1851 1852 edid_ext = drm_find_cea_extension(edid); 1853 if (!edid_ext) 1854 return false; 1855 1856 if (cea_db_offsets(edid_ext, &start_offset, &end_offset)) 1857 return false; 1858 1859 /* 1860 * Because HDMI identifier is in Vendor Specific Block, 1861 * search it from all data blocks of CEA extension. 1862 */ 1863 for_each_cea_db(edid_ext, i, start_offset, end_offset) { 1864 if (cea_db_is_hdmi_vsdb(&edid_ext[i])) 1865 return true; 1866 } 1867 1868 return false; 1869 } 1870 EXPORT_SYMBOL(drm_detect_hdmi_monitor); 1871 1872 /** 1873 * drm_detect_monitor_audio - check monitor audio capability 1874 * 1875 * Monitor should have CEA extension block. 1876 * If monitor has 'basic audio', but no CEA audio blocks, it's 'basic 1877 * audio' only. If there is any audio extension block and supported 1878 * audio format, assume at least 'basic audio' support, even if 'basic 1879 * audio' is not defined in EDID. 1880 * 1881 */ 1882 bool drm_detect_monitor_audio(struct edid *edid) 1883 { 1884 u8 *edid_ext; 1885 int i, j; 1886 bool has_audio = false; 1887 int start_offset, end_offset; 1888 1889 edid_ext = drm_find_cea_extension(edid); 1890 if (!edid_ext) 1891 goto end; 1892 1893 has_audio = ((edid_ext[3] & EDID_BASIC_AUDIO) != 0); 1894 1895 if (has_audio) { 1896 DRM_DEBUG_KMS("Monitor has basic audio support\n"); 1897 goto end; 1898 } 1899 1900 if (cea_db_offsets(edid_ext, &start_offset, &end_offset)) 1901 goto end; 1902 1903 for_each_cea_db(edid_ext, i, start_offset, end_offset) { 1904 if (cea_db_tag(&edid_ext[i]) == AUDIO_BLOCK) { 1905 has_audio = true; 1906 for (j = 1; j < cea_db_payload_len(&edid_ext[i]) + 1; j += 3) 1907 DRM_DEBUG_KMS("CEA audio format %d\n", 1908 (edid_ext[i + j] >> 3) & 0xf); 1909 goto end; 1910 } 1911 } 1912 end: 1913 return has_audio; 1914 } 1915 EXPORT_SYMBOL(drm_detect_monitor_audio); 1916 1917 /** 1918 * drm_rgb_quant_range_selectable - is RGB quantization range selectable? 1919 * 1920 * Check whether the monitor reports the RGB quantization range selection 1921 * as supported. The AVI infoframe can then be used to inform the monitor 1922 * which quantization range (full or limited) is used. 1923 */ 1924 bool drm_rgb_quant_range_selectable(struct edid *edid) 1925 { 1926 u8 *edid_ext; 1927 int i, start, end; 1928 1929 edid_ext = drm_find_cea_extension(edid); 1930 if (!edid_ext) 1931 return false; 1932 1933 if (cea_db_offsets(edid_ext, &start, &end)) 1934 return false; 1935 1936 for_each_cea_db(edid_ext, i, start, end) { 1937 if (cea_db_tag(&edid_ext[i]) == VIDEO_CAPABILITY_BLOCK && 1938 cea_db_payload_len(&edid_ext[i]) == 2) { 1939 DRM_DEBUG_KMS("CEA VCDB 0x%02x\n", edid_ext[i + 2]); 1940 return edid_ext[i + 2] & EDID_CEA_VCDB_QS; 1941 } 1942 } 1943 1944 return false; 1945 } 1946 EXPORT_SYMBOL(drm_rgb_quant_range_selectable); 1947 1948 /** 1949 * drm_add_display_info - pull display info out if present 1950 * @edid: EDID data 1951 * @info: display info (attached to connector) 1952 * 1953 * Grab any available display info and stuff it into the drm_display_info 1954 * structure that's part of the connector. Useful for tracking bpp and 1955 * color spaces. 1956 */ 1957 static void drm_add_display_info(struct edid *edid, 1958 struct drm_display_info *info) 1959 { 1960 u8 *edid_ext; 1961 1962 info->width_mm = edid->width_cm * 10; 1963 info->height_mm = edid->height_cm * 10; 1964 1965 /* driver figures it out in this case */ 1966 info->bpc = 0; 1967 info->color_formats = 0; 1968 1969 if (edid->revision < 3) 1970 return; 1971 1972 if (!(edid->input & DRM_EDID_INPUT_DIGITAL)) 1973 return; 1974 1975 /* Get data from CEA blocks if present */ 1976 edid_ext = drm_find_cea_extension(edid); 1977 if (edid_ext) { 1978 info->cea_rev = edid_ext[1]; 1979 1980 /* The existence of a CEA block should imply RGB support */ 1981 info->color_formats = DRM_COLOR_FORMAT_RGB444; 1982 if (edid_ext[3] & EDID_CEA_YCRCB444) 1983 info->color_formats |= DRM_COLOR_FORMAT_YCRCB444; 1984 if (edid_ext[3] & EDID_CEA_YCRCB422) 1985 info->color_formats |= DRM_COLOR_FORMAT_YCRCB422; 1986 } 1987 1988 /* Only defined for 1.4 with digital displays */ 1989 if (edid->revision < 4) 1990 return; 1991 1992 switch (edid->input & DRM_EDID_DIGITAL_DEPTH_MASK) { 1993 case DRM_EDID_DIGITAL_DEPTH_6: 1994 info->bpc = 6; 1995 break; 1996 case DRM_EDID_DIGITAL_DEPTH_8: 1997 info->bpc = 8; 1998 break; 1999 case DRM_EDID_DIGITAL_DEPTH_10: 2000 info->bpc = 10; 2001 break; 2002 case DRM_EDID_DIGITAL_DEPTH_12: 2003 info->bpc = 12; 2004 break; 2005 case DRM_EDID_DIGITAL_DEPTH_14: 2006 info->bpc = 14; 2007 break; 2008 case DRM_EDID_DIGITAL_DEPTH_16: 2009 info->bpc = 16; 2010 break; 2011 case DRM_EDID_DIGITAL_DEPTH_UNDEF: 2012 default: 2013 info->bpc = 0; 2014 break; 2015 } 2016 2017 info->color_formats |= DRM_COLOR_FORMAT_RGB444; 2018 if (edid->features & DRM_EDID_FEATURE_RGB_YCRCB444) 2019 info->color_formats |= DRM_COLOR_FORMAT_YCRCB444; 2020 if (edid->features & DRM_EDID_FEATURE_RGB_YCRCB422) 2021 info->color_formats |= DRM_COLOR_FORMAT_YCRCB422; 2022 } 2023 2024 /** 2025 * drm_add_edid_modes - add modes from EDID data, if available 2026 * @connector: connector we're probing 2027 * @edid: edid data 2028 * 2029 * Add the specified modes to the connector's mode list. 2030 * 2031 * Return number of modes added or 0 if we couldn't find any. 2032 */ 2033 int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid) 2034 { 2035 int num_modes = 0; 2036 u32 quirks; 2037 2038 if (edid == NULL) { 2039 return 0; 2040 } 2041 if (!drm_edid_is_valid(edid)) { 2042 dev_warn(connector->dev->dev, "%s: EDID invalid.\n", 2043 drm_get_connector_name(connector)); 2044 return 0; 2045 } 2046 2047 quirks = edid_get_quirks(edid); 2048 2049 /* 2050 * EDID spec says modes should be preferred in this order: 2051 * - preferred detailed mode 2052 * - other detailed modes from base block 2053 * - detailed modes from extension blocks 2054 * - CVT 3-byte code modes 2055 * - standard timing codes 2056 * - established timing codes 2057 * - modes inferred from GTF or CVT range information 2058 * 2059 * We get this pretty much right. 2060 * 2061 * XXX order for additional mode types in extension blocks? 2062 */ 2063 num_modes += add_detailed_modes(connector, edid, quirks); 2064 num_modes += add_cvt_modes(connector, edid); 2065 num_modes += add_standard_modes(connector, edid); 2066 num_modes += add_established_modes(connector, edid); 2067 num_modes += add_inferred_modes(connector, edid); 2068 num_modes += add_cea_modes(connector, edid); 2069 2070 if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75)) 2071 edid_fixup_preferred(connector, quirks); 2072 2073 drm_add_display_info(edid, &connector->display_info); 2074 2075 return num_modes; 2076 } 2077 EXPORT_SYMBOL(drm_add_edid_modes); 2078 2079 /** 2080 * drm_add_modes_noedid - add modes for the connectors without EDID 2081 * @connector: connector we're probing 2082 * @hdisplay: the horizontal display limit 2083 * @vdisplay: the vertical display limit 2084 * 2085 * Add the specified modes to the connector's mode list. Only when the 2086 * hdisplay/vdisplay is not beyond the given limit, it will be added. 2087 * 2088 * Return number of modes added or 0 if we couldn't find any. 2089 */ 2090 int drm_add_modes_noedid(struct drm_connector *connector, 2091 int hdisplay, int vdisplay) 2092 { 2093 int i, count, num_modes = 0; 2094 struct drm_display_mode *mode; 2095 struct drm_device *dev = connector->dev; 2096 2097 count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode); 2098 if (hdisplay < 0) 2099 hdisplay = 0; 2100 if (vdisplay < 0) 2101 vdisplay = 0; 2102 2103 for (i = 0; i < count; i++) { 2104 const struct drm_display_mode *ptr = &drm_dmt_modes[i]; 2105 if (hdisplay && vdisplay) { 2106 /* 2107 * Only when two are valid, they will be used to check 2108 * whether the mode should be added to the mode list of 2109 * the connector. 2110 */ 2111 if (ptr->hdisplay > hdisplay || 2112 ptr->vdisplay > vdisplay) 2113 continue; 2114 } 2115 if (drm_mode_vrefresh(ptr) > 61) 2116 continue; 2117 mode = drm_mode_duplicate(dev, ptr); 2118 if (mode) { 2119 drm_mode_probed_add(connector, mode); 2120 num_modes++; 2121 } 2122 } 2123 return num_modes; 2124 } 2125 EXPORT_SYMBOL(drm_add_modes_noedid); 2126