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 #include <linux/kernel.h> 31 #include <linux/slab.h> 32 #include <linux/i2c.h> 33 #include <linux/module.h> 34 #include <drm/drmP.h> 35 #include <drm/drm_edid.h> 36 #include "drm_edid_modes.h" 37 38 #define version_greater(edid, maj, min) \ 39 (((edid)->version > (maj)) || \ 40 ((edid)->version == (maj) && (edid)->revision > (min))) 41 42 #define EDID_EST_TIMINGS 16 43 #define EDID_STD_TIMINGS 8 44 #define EDID_DETAILED_TIMINGS 4 45 46 /* 47 * EDID blocks out in the wild have a variety of bugs, try to collect 48 * them here (note that userspace may work around broken monitors first, 49 * but fixes should make their way here so that the kernel "just works" 50 * on as many displays as possible). 51 */ 52 53 /* First detailed mode wrong, use largest 60Hz mode */ 54 #define EDID_QUIRK_PREFER_LARGE_60 (1 << 0) 55 /* Reported 135MHz pixel clock is too high, needs adjustment */ 56 #define EDID_QUIRK_135_CLOCK_TOO_HIGH (1 << 1) 57 /* Prefer the largest mode at 75 Hz */ 58 #define EDID_QUIRK_PREFER_LARGE_75 (1 << 2) 59 /* Detail timing is in cm not mm */ 60 #define EDID_QUIRK_DETAILED_IN_CM (1 << 3) 61 /* Detailed timing descriptors have bogus size values, so just take the 62 * maximum size and use that. 63 */ 64 #define EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE (1 << 4) 65 /* Monitor forgot to set the first detailed is preferred bit. */ 66 #define EDID_QUIRK_FIRST_DETAILED_PREFERRED (1 << 5) 67 /* use +hsync +vsync for detailed mode */ 68 #define EDID_QUIRK_DETAILED_SYNC_PP (1 << 6) 69 /* Force reduced-blanking timings for detailed modes */ 70 #define EDID_QUIRK_FORCE_REDUCED_BLANKING (1 << 7) 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[4]; 87 int product_id; 88 u32 quirks; 89 } edid_quirk_list[] = { 90 /* ASUS VW222S */ 91 { "ACI", 0x22a2, EDID_QUIRK_FORCE_REDUCED_BLANKING }, 92 93 /* Acer AL1706 */ 94 { "ACR", 44358, EDID_QUIRK_PREFER_LARGE_60 }, 95 /* Acer F51 */ 96 { "API", 0x7602, EDID_QUIRK_PREFER_LARGE_60 }, 97 /* Unknown Acer */ 98 { "ACR", 2423, EDID_QUIRK_FIRST_DETAILED_PREFERRED }, 99 100 /* Belinea 10 15 55 */ 101 { "MAX", 1516, EDID_QUIRK_PREFER_LARGE_60 }, 102 { "MAX", 0x77e, EDID_QUIRK_PREFER_LARGE_60 }, 103 104 /* Envision Peripherals, Inc. EN-7100e */ 105 { "EPI", 59264, EDID_QUIRK_135_CLOCK_TOO_HIGH }, 106 /* Envision EN2028 */ 107 { "EPI", 8232, EDID_QUIRK_PREFER_LARGE_60 }, 108 109 /* Funai Electronics PM36B */ 110 { "FCM", 13600, EDID_QUIRK_PREFER_LARGE_75 | 111 EDID_QUIRK_DETAILED_IN_CM }, 112 113 /* LG Philips LCD LP154W01-A5 */ 114 { "LPL", 0, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE }, 115 { "LPL", 0x2a00, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE }, 116 117 /* Philips 107p5 CRT */ 118 { "PHL", 57364, EDID_QUIRK_FIRST_DETAILED_PREFERRED }, 119 120 /* Proview AY765C */ 121 { "PTS", 765, EDID_QUIRK_FIRST_DETAILED_PREFERRED }, 122 123 /* Samsung SyncMaster 205BW. Note: irony */ 124 { "SAM", 541, EDID_QUIRK_DETAILED_SYNC_PP }, 125 /* Samsung SyncMaster 22[5-6]BW */ 126 { "SAM", 596, EDID_QUIRK_PREFER_LARGE_60 }, 127 { "SAM", 638, EDID_QUIRK_PREFER_LARGE_60 }, 128 129 /* ViewSonic VA2026w */ 130 { "VSC", 5020, EDID_QUIRK_FORCE_REDUCED_BLANKING }, 131 }; 132 133 /*** DDC fetch and block validation ***/ 134 135 static const u8 edid_header[] = { 136 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 137 }; 138 139 /* 140 * Sanity check the header of the base EDID block. Return 8 if the header 141 * is perfect, down to 0 if it's totally wrong. 142 */ 143 int drm_edid_header_is_valid(const u8 *raw_edid) 144 { 145 int i, score = 0; 146 147 for (i = 0; i < sizeof(edid_header); i++) 148 if (raw_edid[i] == edid_header[i]) 149 score++; 150 151 return score; 152 } 153 EXPORT_SYMBOL(drm_edid_header_is_valid); 154 155 static int edid_fixup __read_mostly = 6; 156 module_param_named(edid_fixup, edid_fixup, int, 0400); 157 MODULE_PARM_DESC(edid_fixup, 158 "Minimum number of valid EDID header bytes (0-8, default 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 printk(KERN_ERR "Raw EDID:\n"); 217 print_hex_dump(KERN_ERR, " \t", DUMP_PREFIX_NONE, 16, 1, 218 raw_edid, EDID_LENGTH, false); 219 } 220 return 0; 221 } 222 EXPORT_SYMBOL(drm_edid_block_valid); 223 224 /** 225 * drm_edid_is_valid - sanity check EDID data 226 * @edid: EDID data 227 * 228 * Sanity-check an entire EDID record (including extensions) 229 */ 230 bool drm_edid_is_valid(struct edid *edid) 231 { 232 int i; 233 u8 *raw = (u8 *)edid; 234 235 if (!edid) 236 return false; 237 238 for (i = 0; i <= edid->extensions; i++) 239 if (!drm_edid_block_valid(raw + i * EDID_LENGTH, i, true)) 240 return false; 241 242 return true; 243 } 244 EXPORT_SYMBOL(drm_edid_is_valid); 245 246 #define DDC_SEGMENT_ADDR 0x30 247 /** 248 * Get EDID information via I2C. 249 * 250 * \param adapter : i2c device adaptor 251 * \param buf : EDID data buffer to be filled 252 * \param len : EDID data buffer length 253 * \return 0 on success or -1 on failure. 254 * 255 * Try to fetch EDID information by calling i2c driver function. 256 */ 257 static int 258 drm_do_probe_ddc_edid(struct i2c_adapter *adapter, unsigned char *buf, 259 int block, int len) 260 { 261 unsigned char start = block * EDID_LENGTH; 262 unsigned char segment = block >> 1; 263 unsigned char xfers = segment ? 3 : 2; 264 int ret, retries = 5; 265 266 /* The core i2c driver will automatically retry the transfer if the 267 * adapter reports EAGAIN. However, we find that bit-banging transfers 268 * are susceptible to errors under a heavily loaded machine and 269 * generate spurious NAKs and timeouts. Retrying the transfer 270 * of the individual block a few times seems to overcome this. 271 */ 272 do { 273 struct i2c_msg msgs[] = { 274 { 275 .addr = DDC_SEGMENT_ADDR, 276 .flags = 0, 277 .len = 1, 278 .buf = &segment, 279 }, { 280 .addr = DDC_ADDR, 281 .flags = 0, 282 .len = 1, 283 .buf = &start, 284 }, { 285 .addr = DDC_ADDR, 286 .flags = I2C_M_RD, 287 .len = len, 288 .buf = buf, 289 } 290 }; 291 292 /* 293 * Avoid sending the segment addr to not upset non-compliant ddc 294 * monitors. 295 */ 296 ret = i2c_transfer(adapter, &msgs[3 - xfers], xfers); 297 298 if (ret == -ENXIO) { 299 DRM_DEBUG_KMS("drm: skipping non-existent adapter %s\n", 300 adapter->name); 301 break; 302 } 303 } while (ret != xfers && --retries); 304 305 return ret == xfers ? 0 : -1; 306 } 307 308 static bool drm_edid_is_zero(u8 *in_edid, int length) 309 { 310 if (memchr_inv(in_edid, 0, length)) 311 return false; 312 313 return true; 314 } 315 316 static u8 * 317 drm_do_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter) 318 { 319 int i, j = 0, valid_extensions = 0; 320 u8 *block, *new; 321 bool print_bad_edid = !connector->bad_edid_counter || (drm_debug & DRM_UT_KMS); 322 323 if ((block = kmalloc(EDID_LENGTH, GFP_KERNEL)) == NULL) 324 return NULL; 325 326 /* base block fetch */ 327 for (i = 0; i < 4; i++) { 328 if (drm_do_probe_ddc_edid(adapter, block, 0, EDID_LENGTH)) 329 goto out; 330 if (drm_edid_block_valid(block, 0, print_bad_edid)) 331 break; 332 if (i == 0 && drm_edid_is_zero(block, EDID_LENGTH)) { 333 connector->null_edid_counter++; 334 goto carp; 335 } 336 } 337 if (i == 4) 338 goto carp; 339 340 /* if there's no extensions, we're done */ 341 if (block[0x7e] == 0) 342 return block; 343 344 new = krealloc(block, (block[0x7e] + 1) * EDID_LENGTH, GFP_KERNEL); 345 if (!new) 346 goto out; 347 block = new; 348 349 for (j = 1; j <= block[0x7e]; j++) { 350 for (i = 0; i < 4; i++) { 351 if (drm_do_probe_ddc_edid(adapter, 352 block + (valid_extensions + 1) * EDID_LENGTH, 353 j, EDID_LENGTH)) 354 goto out; 355 if (drm_edid_block_valid(block + (valid_extensions + 1) * EDID_LENGTH, j, print_bad_edid)) { 356 valid_extensions++; 357 break; 358 } 359 } 360 if (i == 4) 361 dev_warn(connector->dev->dev, 362 "%s: Ignoring invalid EDID block %d.\n", 363 drm_get_connector_name(connector), j); 364 } 365 366 if (valid_extensions != block[0x7e]) { 367 block[EDID_LENGTH-1] += block[0x7e] - valid_extensions; 368 block[0x7e] = valid_extensions; 369 new = krealloc(block, (valid_extensions + 1) * EDID_LENGTH, GFP_KERNEL); 370 if (!new) 371 goto out; 372 block = new; 373 } 374 375 return block; 376 377 carp: 378 if (print_bad_edid) { 379 dev_warn(connector->dev->dev, "%s: EDID block %d invalid.\n", 380 drm_get_connector_name(connector), j); 381 } 382 connector->bad_edid_counter++; 383 384 out: 385 kfree(block); 386 return NULL; 387 } 388 389 /** 390 * Probe DDC presence. 391 * 392 * \param adapter : i2c device adaptor 393 * \return 1 on success 394 */ 395 bool 396 drm_probe_ddc(struct i2c_adapter *adapter) 397 { 398 unsigned char out; 399 400 return (drm_do_probe_ddc_edid(adapter, &out, 0, 1) == 0); 401 } 402 EXPORT_SYMBOL(drm_probe_ddc); 403 404 /** 405 * drm_get_edid - get EDID data, if available 406 * @connector: connector we're probing 407 * @adapter: i2c adapter to use for DDC 408 * 409 * Poke the given i2c channel to grab EDID data if possible. If found, 410 * attach it to the connector. 411 * 412 * Return edid data or NULL if we couldn't find any. 413 */ 414 struct edid *drm_get_edid(struct drm_connector *connector, 415 struct i2c_adapter *adapter) 416 { 417 struct edid *edid = NULL; 418 419 if (drm_probe_ddc(adapter)) 420 edid = (struct edid *)drm_do_get_edid(connector, adapter); 421 422 return edid; 423 } 424 EXPORT_SYMBOL(drm_get_edid); 425 426 /*** EDID parsing ***/ 427 428 /** 429 * edid_vendor - match a string against EDID's obfuscated vendor field 430 * @edid: EDID to match 431 * @vendor: vendor string 432 * 433 * Returns true if @vendor is in @edid, false otherwise 434 */ 435 static bool edid_vendor(struct edid *edid, char *vendor) 436 { 437 char edid_vendor[3]; 438 439 edid_vendor[0] = ((edid->mfg_id[0] & 0x7c) >> 2) + '@'; 440 edid_vendor[1] = (((edid->mfg_id[0] & 0x3) << 3) | 441 ((edid->mfg_id[1] & 0xe0) >> 5)) + '@'; 442 edid_vendor[2] = (edid->mfg_id[1] & 0x1f) + '@'; 443 444 return !strncmp(edid_vendor, vendor, 3); 445 } 446 447 /** 448 * edid_get_quirks - return quirk flags for a given EDID 449 * @edid: EDID to process 450 * 451 * This tells subsequent routines what fixes they need to apply. 452 */ 453 static u32 edid_get_quirks(struct edid *edid) 454 { 455 struct edid_quirk *quirk; 456 int i; 457 458 for (i = 0; i < ARRAY_SIZE(edid_quirk_list); i++) { 459 quirk = &edid_quirk_list[i]; 460 461 if (edid_vendor(edid, quirk->vendor) && 462 (EDID_PRODUCT_ID(edid) == quirk->product_id)) 463 return quirk->quirks; 464 } 465 466 return 0; 467 } 468 469 #define MODE_SIZE(m) ((m)->hdisplay * (m)->vdisplay) 470 #define MODE_REFRESH_DIFF(m,r) (abs((m)->vrefresh - target_refresh)) 471 472 /** 473 * edid_fixup_preferred - set preferred modes based on quirk list 474 * @connector: has mode list to fix up 475 * @quirks: quirks list 476 * 477 * Walk the mode list for @connector, clearing the preferred status 478 * on existing modes and setting it anew for the right mode ala @quirks. 479 */ 480 static void edid_fixup_preferred(struct drm_connector *connector, 481 u32 quirks) 482 { 483 struct drm_display_mode *t, *cur_mode, *preferred_mode; 484 int target_refresh = 0; 485 486 if (list_empty(&connector->probed_modes)) 487 return; 488 489 if (quirks & EDID_QUIRK_PREFER_LARGE_60) 490 target_refresh = 60; 491 if (quirks & EDID_QUIRK_PREFER_LARGE_75) 492 target_refresh = 75; 493 494 preferred_mode = list_first_entry(&connector->probed_modes, 495 struct drm_display_mode, head); 496 497 list_for_each_entry_safe(cur_mode, t, &connector->probed_modes, head) { 498 cur_mode->type &= ~DRM_MODE_TYPE_PREFERRED; 499 500 if (cur_mode == preferred_mode) 501 continue; 502 503 /* Largest mode is preferred */ 504 if (MODE_SIZE(cur_mode) > MODE_SIZE(preferred_mode)) 505 preferred_mode = cur_mode; 506 507 /* At a given size, try to get closest to target refresh */ 508 if ((MODE_SIZE(cur_mode) == MODE_SIZE(preferred_mode)) && 509 MODE_REFRESH_DIFF(cur_mode, target_refresh) < 510 MODE_REFRESH_DIFF(preferred_mode, target_refresh)) { 511 preferred_mode = cur_mode; 512 } 513 } 514 515 preferred_mode->type |= DRM_MODE_TYPE_PREFERRED; 516 } 517 518 static bool 519 mode_is_rb(const struct drm_display_mode *mode) 520 { 521 return (mode->htotal - mode->hdisplay == 160) && 522 (mode->hsync_end - mode->hdisplay == 80) && 523 (mode->hsync_end - mode->hsync_start == 32) && 524 (mode->vsync_start - mode->vdisplay == 3); 525 } 526 527 /* 528 * drm_mode_find_dmt - Create a copy of a mode if present in DMT 529 * @dev: Device to duplicate against 530 * @hsize: Mode width 531 * @vsize: Mode height 532 * @fresh: Mode refresh rate 533 * @rb: Mode reduced-blanking-ness 534 * 535 * Walk the DMT mode list looking for a match for the given parameters. 536 * Return a newly allocated copy of the mode, or NULL if not found. 537 */ 538 struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev, 539 int hsize, int vsize, int fresh, 540 bool rb) 541 { 542 int i; 543 544 for (i = 0; i < drm_num_dmt_modes; i++) { 545 const struct drm_display_mode *ptr = &drm_dmt_modes[i]; 546 if (hsize != ptr->hdisplay) 547 continue; 548 if (vsize != ptr->vdisplay) 549 continue; 550 if (fresh != drm_mode_vrefresh(ptr)) 551 continue; 552 if (rb != mode_is_rb(ptr)) 553 continue; 554 555 return drm_mode_duplicate(dev, ptr); 556 } 557 558 return NULL; 559 } 560 EXPORT_SYMBOL(drm_mode_find_dmt); 561 562 typedef void detailed_cb(struct detailed_timing *timing, void *closure); 563 564 static void 565 cea_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure) 566 { 567 int i, n = 0; 568 u8 d = ext[0x02]; 569 u8 *det_base = ext + d; 570 571 n = (127 - d) / 18; 572 for (i = 0; i < n; i++) 573 cb((struct detailed_timing *)(det_base + 18 * i), closure); 574 } 575 576 static void 577 vtb_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure) 578 { 579 unsigned int i, n = min((int)ext[0x02], 6); 580 u8 *det_base = ext + 5; 581 582 if (ext[0x01] != 1) 583 return; /* unknown version */ 584 585 for (i = 0; i < n; i++) 586 cb((struct detailed_timing *)(det_base + 18 * i), closure); 587 } 588 589 static void 590 drm_for_each_detailed_block(u8 *raw_edid, detailed_cb *cb, void *closure) 591 { 592 int i; 593 struct edid *edid = (struct edid *)raw_edid; 594 595 if (edid == NULL) 596 return; 597 598 for (i = 0; i < EDID_DETAILED_TIMINGS; i++) 599 cb(&(edid->detailed_timings[i]), closure); 600 601 for (i = 1; i <= raw_edid[0x7e]; i++) { 602 u8 *ext = raw_edid + (i * EDID_LENGTH); 603 switch (*ext) { 604 case CEA_EXT: 605 cea_for_each_detailed_block(ext, cb, closure); 606 break; 607 case VTB_EXT: 608 vtb_for_each_detailed_block(ext, cb, closure); 609 break; 610 default: 611 break; 612 } 613 } 614 } 615 616 static void 617 is_rb(struct detailed_timing *t, void *data) 618 { 619 u8 *r = (u8 *)t; 620 if (r[3] == EDID_DETAIL_MONITOR_RANGE) 621 if (r[15] & 0x10) 622 *(bool *)data = true; 623 } 624 625 /* EDID 1.4 defines this explicitly. For EDID 1.3, we guess, badly. */ 626 static bool 627 drm_monitor_supports_rb(struct edid *edid) 628 { 629 if (edid->revision >= 4) { 630 bool ret = false; 631 drm_for_each_detailed_block((u8 *)edid, is_rb, &ret); 632 return ret; 633 } 634 635 return ((edid->input & DRM_EDID_INPUT_DIGITAL) != 0); 636 } 637 638 static void 639 find_gtf2(struct detailed_timing *t, void *data) 640 { 641 u8 *r = (u8 *)t; 642 if (r[3] == EDID_DETAIL_MONITOR_RANGE && r[10] == 0x02) 643 *(u8 **)data = r; 644 } 645 646 /* Secondary GTF curve kicks in above some break frequency */ 647 static int 648 drm_gtf2_hbreak(struct edid *edid) 649 { 650 u8 *r = NULL; 651 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); 652 return r ? (r[12] * 2) : 0; 653 } 654 655 static int 656 drm_gtf2_2c(struct edid *edid) 657 { 658 u8 *r = NULL; 659 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); 660 return r ? r[13] : 0; 661 } 662 663 static int 664 drm_gtf2_m(struct edid *edid) 665 { 666 u8 *r = NULL; 667 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); 668 return r ? (r[15] << 8) + r[14] : 0; 669 } 670 671 static int 672 drm_gtf2_k(struct edid *edid) 673 { 674 u8 *r = NULL; 675 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); 676 return r ? r[16] : 0; 677 } 678 679 static int 680 drm_gtf2_2j(struct edid *edid) 681 { 682 u8 *r = NULL; 683 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); 684 return r ? r[17] : 0; 685 } 686 687 /** 688 * standard_timing_level - get std. timing level(CVT/GTF/DMT) 689 * @edid: EDID block to scan 690 */ 691 static int standard_timing_level(struct edid *edid) 692 { 693 if (edid->revision >= 2) { 694 if (edid->revision >= 4 && (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF)) 695 return LEVEL_CVT; 696 if (drm_gtf2_hbreak(edid)) 697 return LEVEL_GTF2; 698 return LEVEL_GTF; 699 } 700 return LEVEL_DMT; 701 } 702 703 /* 704 * 0 is reserved. The spec says 0x01 fill for unused timings. Some old 705 * monitors fill with ascii space (0x20) instead. 706 */ 707 static int 708 bad_std_timing(u8 a, u8 b) 709 { 710 return (a == 0x00 && b == 0x00) || 711 (a == 0x01 && b == 0x01) || 712 (a == 0x20 && b == 0x20); 713 } 714 715 /** 716 * drm_mode_std - convert standard mode info (width, height, refresh) into mode 717 * @t: standard timing params 718 * @timing_level: standard timing level 719 * 720 * Take the standard timing params (in this case width, aspect, and refresh) 721 * and convert them into a real mode using CVT/GTF/DMT. 722 */ 723 static struct drm_display_mode * 724 drm_mode_std(struct drm_connector *connector, struct edid *edid, 725 struct std_timing *t, int revision) 726 { 727 struct drm_device *dev = connector->dev; 728 struct drm_display_mode *m, *mode = NULL; 729 int hsize, vsize; 730 int vrefresh_rate; 731 unsigned aspect_ratio = (t->vfreq_aspect & EDID_TIMING_ASPECT_MASK) 732 >> EDID_TIMING_ASPECT_SHIFT; 733 unsigned vfreq = (t->vfreq_aspect & EDID_TIMING_VFREQ_MASK) 734 >> EDID_TIMING_VFREQ_SHIFT; 735 int timing_level = standard_timing_level(edid); 736 737 if (bad_std_timing(t->hsize, t->vfreq_aspect)) 738 return NULL; 739 740 /* According to the EDID spec, the hdisplay = hsize * 8 + 248 */ 741 hsize = t->hsize * 8 + 248; 742 /* vrefresh_rate = vfreq + 60 */ 743 vrefresh_rate = vfreq + 60; 744 /* the vdisplay is calculated based on the aspect ratio */ 745 if (aspect_ratio == 0) { 746 if (revision < 3) 747 vsize = hsize; 748 else 749 vsize = (hsize * 10) / 16; 750 } else if (aspect_ratio == 1) 751 vsize = (hsize * 3) / 4; 752 else if (aspect_ratio == 2) 753 vsize = (hsize * 4) / 5; 754 else 755 vsize = (hsize * 9) / 16; 756 757 /* HDTV hack, part 1 */ 758 if (vrefresh_rate == 60 && 759 ((hsize == 1360 && vsize == 765) || 760 (hsize == 1368 && vsize == 769))) { 761 hsize = 1366; 762 vsize = 768; 763 } 764 765 /* 766 * If this connector already has a mode for this size and refresh 767 * rate (because it came from detailed or CVT info), use that 768 * instead. This way we don't have to guess at interlace or 769 * reduced blanking. 770 */ 771 list_for_each_entry(m, &connector->probed_modes, head) 772 if (m->hdisplay == hsize && m->vdisplay == vsize && 773 drm_mode_vrefresh(m) == vrefresh_rate) 774 return NULL; 775 776 /* HDTV hack, part 2 */ 777 if (hsize == 1366 && vsize == 768 && vrefresh_rate == 60) { 778 mode = drm_cvt_mode(dev, 1366, 768, vrefresh_rate, 0, 0, 779 false); 780 mode->hdisplay = 1366; 781 mode->hsync_start = mode->hsync_start - 1; 782 mode->hsync_end = mode->hsync_end - 1; 783 return mode; 784 } 785 786 /* check whether it can be found in default mode table */ 787 if (drm_monitor_supports_rb(edid)) { 788 mode = drm_mode_find_dmt(dev, hsize, vsize, vrefresh_rate, 789 true); 790 if (mode) 791 return mode; 792 } 793 mode = drm_mode_find_dmt(dev, hsize, vsize, vrefresh_rate, false); 794 if (mode) 795 return mode; 796 797 /* okay, generate it */ 798 switch (timing_level) { 799 case LEVEL_DMT: 800 break; 801 case LEVEL_GTF: 802 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0); 803 break; 804 case LEVEL_GTF2: 805 /* 806 * This is potentially wrong if there's ever a monitor with 807 * more than one ranges section, each claiming a different 808 * secondary GTF curve. Please don't do that. 809 */ 810 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0); 811 if (!mode) 812 return NULL; 813 if (drm_mode_hsync(mode) > drm_gtf2_hbreak(edid)) { 814 drm_mode_destroy(dev, mode); 815 mode = drm_gtf_mode_complex(dev, hsize, vsize, 816 vrefresh_rate, 0, 0, 817 drm_gtf2_m(edid), 818 drm_gtf2_2c(edid), 819 drm_gtf2_k(edid), 820 drm_gtf2_2j(edid)); 821 } 822 break; 823 case LEVEL_CVT: 824 mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0, 825 false); 826 break; 827 } 828 return mode; 829 } 830 831 /* 832 * EDID is delightfully ambiguous about how interlaced modes are to be 833 * encoded. Our internal representation is of frame height, but some 834 * HDTV detailed timings are encoded as field height. 835 * 836 * The format list here is from CEA, in frame size. Technically we 837 * should be checking refresh rate too. Whatever. 838 */ 839 static void 840 drm_mode_do_interlace_quirk(struct drm_display_mode *mode, 841 struct detailed_pixel_timing *pt) 842 { 843 int i; 844 static const struct { 845 int w, h; 846 } cea_interlaced[] = { 847 { 1920, 1080 }, 848 { 720, 480 }, 849 { 1440, 480 }, 850 { 2880, 480 }, 851 { 720, 576 }, 852 { 1440, 576 }, 853 { 2880, 576 }, 854 }; 855 856 if (!(pt->misc & DRM_EDID_PT_INTERLACED)) 857 return; 858 859 for (i = 0; i < ARRAY_SIZE(cea_interlaced); i++) { 860 if ((mode->hdisplay == cea_interlaced[i].w) && 861 (mode->vdisplay == cea_interlaced[i].h / 2)) { 862 mode->vdisplay *= 2; 863 mode->vsync_start *= 2; 864 mode->vsync_end *= 2; 865 mode->vtotal *= 2; 866 mode->vtotal |= 1; 867 } 868 } 869 870 mode->flags |= DRM_MODE_FLAG_INTERLACE; 871 } 872 873 /** 874 * drm_mode_detailed - create a new mode from an EDID detailed timing section 875 * @dev: DRM device (needed to create new mode) 876 * @edid: EDID block 877 * @timing: EDID detailed timing info 878 * @quirks: quirks to apply 879 * 880 * An EDID detailed timing block contains enough info for us to create and 881 * return a new struct drm_display_mode. 882 */ 883 static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev, 884 struct edid *edid, 885 struct detailed_timing *timing, 886 u32 quirks) 887 { 888 struct drm_display_mode *mode; 889 struct detailed_pixel_timing *pt = &timing->data.pixel_data; 890 unsigned hactive = (pt->hactive_hblank_hi & 0xf0) << 4 | pt->hactive_lo; 891 unsigned vactive = (pt->vactive_vblank_hi & 0xf0) << 4 | pt->vactive_lo; 892 unsigned hblank = (pt->hactive_hblank_hi & 0xf) << 8 | pt->hblank_lo; 893 unsigned vblank = (pt->vactive_vblank_hi & 0xf) << 8 | pt->vblank_lo; 894 unsigned hsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc0) << 2 | pt->hsync_offset_lo; 895 unsigned hsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x30) << 4 | pt->hsync_pulse_width_lo; 896 unsigned vsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc) >> 2 | pt->vsync_offset_pulse_width_lo >> 4; 897 unsigned vsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x3) << 4 | (pt->vsync_offset_pulse_width_lo & 0xf); 898 899 /* ignore tiny modes */ 900 if (hactive < 64 || vactive < 64) 901 return NULL; 902 903 if (pt->misc & DRM_EDID_PT_STEREO) { 904 printk(KERN_WARNING "stereo mode not supported\n"); 905 return NULL; 906 } 907 if (!(pt->misc & DRM_EDID_PT_SEPARATE_SYNC)) { 908 printk(KERN_WARNING "composite sync not supported\n"); 909 } 910 911 /* it is incorrect if hsync/vsync width is zero */ 912 if (!hsync_pulse_width || !vsync_pulse_width) { 913 DRM_DEBUG_KMS("Incorrect Detailed timing. " 914 "Wrong Hsync/Vsync pulse width\n"); 915 return NULL; 916 } 917 918 if (quirks & EDID_QUIRK_FORCE_REDUCED_BLANKING) { 919 mode = drm_cvt_mode(dev, hactive, vactive, 60, true, false, false); 920 if (!mode) 921 return NULL; 922 923 goto set_size; 924 } 925 926 mode = drm_mode_create(dev); 927 if (!mode) 928 return NULL; 929 930 if (quirks & EDID_QUIRK_135_CLOCK_TOO_HIGH) 931 timing->pixel_clock = cpu_to_le16(1088); 932 933 mode->clock = le16_to_cpu(timing->pixel_clock) * 10; 934 935 mode->hdisplay = hactive; 936 mode->hsync_start = mode->hdisplay + hsync_offset; 937 mode->hsync_end = mode->hsync_start + hsync_pulse_width; 938 mode->htotal = mode->hdisplay + hblank; 939 940 mode->vdisplay = vactive; 941 mode->vsync_start = mode->vdisplay + vsync_offset; 942 mode->vsync_end = mode->vsync_start + vsync_pulse_width; 943 mode->vtotal = mode->vdisplay + vblank; 944 945 /* Some EDIDs have bogus h/vtotal values */ 946 if (mode->hsync_end > mode->htotal) 947 mode->htotal = mode->hsync_end + 1; 948 if (mode->vsync_end > mode->vtotal) 949 mode->vtotal = mode->vsync_end + 1; 950 951 drm_mode_do_interlace_quirk(mode, pt); 952 953 if (quirks & EDID_QUIRK_DETAILED_SYNC_PP) { 954 pt->misc |= DRM_EDID_PT_HSYNC_POSITIVE | DRM_EDID_PT_VSYNC_POSITIVE; 955 } 956 957 mode->flags |= (pt->misc & DRM_EDID_PT_HSYNC_POSITIVE) ? 958 DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC; 959 mode->flags |= (pt->misc & DRM_EDID_PT_VSYNC_POSITIVE) ? 960 DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC; 961 962 set_size: 963 mode->width_mm = pt->width_mm_lo | (pt->width_height_mm_hi & 0xf0) << 4; 964 mode->height_mm = pt->height_mm_lo | (pt->width_height_mm_hi & 0xf) << 8; 965 966 if (quirks & EDID_QUIRK_DETAILED_IN_CM) { 967 mode->width_mm *= 10; 968 mode->height_mm *= 10; 969 } 970 971 if (quirks & EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE) { 972 mode->width_mm = edid->width_cm * 10; 973 mode->height_mm = edid->height_cm * 10; 974 } 975 976 mode->type = DRM_MODE_TYPE_DRIVER; 977 drm_mode_set_name(mode); 978 979 return mode; 980 } 981 982 static bool 983 mode_in_hsync_range(const struct drm_display_mode *mode, 984 struct edid *edid, u8 *t) 985 { 986 int hsync, hmin, hmax; 987 988 hmin = t[7]; 989 if (edid->revision >= 4) 990 hmin += ((t[4] & 0x04) ? 255 : 0); 991 hmax = t[8]; 992 if (edid->revision >= 4) 993 hmax += ((t[4] & 0x08) ? 255 : 0); 994 hsync = drm_mode_hsync(mode); 995 996 return (hsync <= hmax && hsync >= hmin); 997 } 998 999 static bool 1000 mode_in_vsync_range(const struct drm_display_mode *mode, 1001 struct edid *edid, u8 *t) 1002 { 1003 int vsync, vmin, vmax; 1004 1005 vmin = t[5]; 1006 if (edid->revision >= 4) 1007 vmin += ((t[4] & 0x01) ? 255 : 0); 1008 vmax = t[6]; 1009 if (edid->revision >= 4) 1010 vmax += ((t[4] & 0x02) ? 255 : 0); 1011 vsync = drm_mode_vrefresh(mode); 1012 1013 return (vsync <= vmax && vsync >= vmin); 1014 } 1015 1016 static u32 1017 range_pixel_clock(struct edid *edid, u8 *t) 1018 { 1019 /* unspecified */ 1020 if (t[9] == 0 || t[9] == 255) 1021 return 0; 1022 1023 /* 1.4 with CVT support gives us real precision, yay */ 1024 if (edid->revision >= 4 && t[10] == 0x04) 1025 return (t[9] * 10000) - ((t[12] >> 2) * 250); 1026 1027 /* 1.3 is pathetic, so fuzz up a bit */ 1028 return t[9] * 10000 + 5001; 1029 } 1030 1031 static bool 1032 mode_in_range(const struct drm_display_mode *mode, struct edid *edid, 1033 struct detailed_timing *timing) 1034 { 1035 u32 max_clock; 1036 u8 *t = (u8 *)timing; 1037 1038 if (!mode_in_hsync_range(mode, edid, t)) 1039 return false; 1040 1041 if (!mode_in_vsync_range(mode, edid, t)) 1042 return false; 1043 1044 if ((max_clock = range_pixel_clock(edid, t))) 1045 if (mode->clock > max_clock) 1046 return false; 1047 1048 /* 1.4 max horizontal check */ 1049 if (edid->revision >= 4 && t[10] == 0x04) 1050 if (t[13] && mode->hdisplay > 8 * (t[13] + (256 * (t[12]&0x3)))) 1051 return false; 1052 1053 if (mode_is_rb(mode) && !drm_monitor_supports_rb(edid)) 1054 return false; 1055 1056 return true; 1057 } 1058 1059 static bool valid_inferred_mode(const struct drm_connector *connector, 1060 const struct drm_display_mode *mode) 1061 { 1062 struct drm_display_mode *m; 1063 bool ok = false; 1064 1065 list_for_each_entry(m, &connector->probed_modes, head) { 1066 if (mode->hdisplay == m->hdisplay && 1067 mode->vdisplay == m->vdisplay && 1068 drm_mode_vrefresh(mode) == drm_mode_vrefresh(m)) 1069 return false; /* duplicated */ 1070 if (mode->hdisplay <= m->hdisplay && 1071 mode->vdisplay <= m->vdisplay) 1072 ok = true; 1073 } 1074 return ok; 1075 } 1076 1077 static int 1078 drm_dmt_modes_for_range(struct drm_connector *connector, struct edid *edid, 1079 struct detailed_timing *timing) 1080 { 1081 int i, modes = 0; 1082 struct drm_display_mode *newmode; 1083 struct drm_device *dev = connector->dev; 1084 1085 for (i = 0; i < drm_num_dmt_modes; i++) { 1086 if (mode_in_range(drm_dmt_modes + i, edid, timing) && 1087 valid_inferred_mode(connector, drm_dmt_modes + i)) { 1088 newmode = drm_mode_duplicate(dev, &drm_dmt_modes[i]); 1089 if (newmode) { 1090 drm_mode_probed_add(connector, newmode); 1091 modes++; 1092 } 1093 } 1094 } 1095 1096 return modes; 1097 } 1098 1099 /* fix up 1366x768 mode from 1368x768; 1100 * GFT/CVT can't express 1366 width which isn't dividable by 8 1101 */ 1102 static void fixup_mode_1366x768(struct drm_display_mode *mode) 1103 { 1104 if (mode->hdisplay == 1368 && mode->vdisplay == 768) { 1105 mode->hdisplay = 1366; 1106 mode->hsync_start--; 1107 mode->hsync_end--; 1108 drm_mode_set_name(mode); 1109 } 1110 } 1111 1112 static int 1113 drm_gtf_modes_for_range(struct drm_connector *connector, struct edid *edid, 1114 struct detailed_timing *timing) 1115 { 1116 int i, modes = 0; 1117 struct drm_display_mode *newmode; 1118 struct drm_device *dev = connector->dev; 1119 1120 for (i = 0; i < num_extra_modes; i++) { 1121 const struct minimode *m = &extra_modes[i]; 1122 newmode = drm_gtf_mode(dev, m->w, m->h, m->r, 0, 0); 1123 if (!newmode) 1124 return modes; 1125 1126 fixup_mode_1366x768(newmode); 1127 if (!mode_in_range(newmode, edid, timing) || 1128 !valid_inferred_mode(connector, newmode)) { 1129 drm_mode_destroy(dev, newmode); 1130 continue; 1131 } 1132 1133 drm_mode_probed_add(connector, newmode); 1134 modes++; 1135 } 1136 1137 return modes; 1138 } 1139 1140 static int 1141 drm_cvt_modes_for_range(struct drm_connector *connector, struct edid *edid, 1142 struct detailed_timing *timing) 1143 { 1144 int i, modes = 0; 1145 struct drm_display_mode *newmode; 1146 struct drm_device *dev = connector->dev; 1147 bool rb = drm_monitor_supports_rb(edid); 1148 1149 for (i = 0; i < num_extra_modes; i++) { 1150 const struct minimode *m = &extra_modes[i]; 1151 newmode = drm_cvt_mode(dev, m->w, m->h, m->r, rb, 0, 0); 1152 if (!newmode) 1153 return modes; 1154 1155 fixup_mode_1366x768(newmode); 1156 if (!mode_in_range(newmode, edid, timing) || 1157 !valid_inferred_mode(connector, newmode)) { 1158 drm_mode_destroy(dev, newmode); 1159 continue; 1160 } 1161 1162 drm_mode_probed_add(connector, newmode); 1163 modes++; 1164 } 1165 1166 return modes; 1167 } 1168 1169 static void 1170 do_inferred_modes(struct detailed_timing *timing, void *c) 1171 { 1172 struct detailed_mode_closure *closure = c; 1173 struct detailed_non_pixel *data = &timing->data.other_data; 1174 struct detailed_data_monitor_range *range = &data->data.range; 1175 1176 if (data->type != EDID_DETAIL_MONITOR_RANGE) 1177 return; 1178 1179 closure->modes += drm_dmt_modes_for_range(closure->connector, 1180 closure->edid, 1181 timing); 1182 1183 if (!version_greater(closure->edid, 1, 1)) 1184 return; /* GTF not defined yet */ 1185 1186 switch (range->flags) { 1187 case 0x02: /* secondary gtf, XXX could do more */ 1188 case 0x00: /* default gtf */ 1189 closure->modes += drm_gtf_modes_for_range(closure->connector, 1190 closure->edid, 1191 timing); 1192 break; 1193 case 0x04: /* cvt, only in 1.4+ */ 1194 if (!version_greater(closure->edid, 1, 3)) 1195 break; 1196 1197 closure->modes += drm_cvt_modes_for_range(closure->connector, 1198 closure->edid, 1199 timing); 1200 break; 1201 case 0x01: /* just the ranges, no formula */ 1202 default: 1203 break; 1204 } 1205 } 1206 1207 static int 1208 add_inferred_modes(struct drm_connector *connector, struct edid *edid) 1209 { 1210 struct detailed_mode_closure closure = { 1211 connector, edid, 0, 0, 0 1212 }; 1213 1214 if (version_greater(edid, 1, 0)) 1215 drm_for_each_detailed_block((u8 *)edid, do_inferred_modes, 1216 &closure); 1217 1218 return closure.modes; 1219 } 1220 1221 static int 1222 drm_est3_modes(struct drm_connector *connector, struct detailed_timing *timing) 1223 { 1224 int i, j, m, modes = 0; 1225 struct drm_display_mode *mode; 1226 u8 *est = ((u8 *)timing) + 5; 1227 1228 for (i = 0; i < 6; i++) { 1229 for (j = 7; j > 0; j--) { 1230 m = (i * 8) + (7 - j); 1231 if (m >= ARRAY_SIZE(est3_modes)) 1232 break; 1233 if (est[i] & (1 << j)) { 1234 mode = drm_mode_find_dmt(connector->dev, 1235 est3_modes[m].w, 1236 est3_modes[m].h, 1237 est3_modes[m].r, 1238 est3_modes[m].rb); 1239 if (mode) { 1240 drm_mode_probed_add(connector, mode); 1241 modes++; 1242 } 1243 } 1244 } 1245 } 1246 1247 return modes; 1248 } 1249 1250 static void 1251 do_established_modes(struct detailed_timing *timing, void *c) 1252 { 1253 struct detailed_mode_closure *closure = c; 1254 struct detailed_non_pixel *data = &timing->data.other_data; 1255 1256 if (data->type == EDID_DETAIL_EST_TIMINGS) 1257 closure->modes += drm_est3_modes(closure->connector, timing); 1258 } 1259 1260 /** 1261 * add_established_modes - get est. modes from EDID and add them 1262 * @edid: EDID block to scan 1263 * 1264 * Each EDID block contains a bitmap of the supported "established modes" list 1265 * (defined above). Tease them out and add them to the global modes list. 1266 */ 1267 static int 1268 add_established_modes(struct drm_connector *connector, struct edid *edid) 1269 { 1270 struct drm_device *dev = connector->dev; 1271 unsigned long est_bits = edid->established_timings.t1 | 1272 (edid->established_timings.t2 << 8) | 1273 ((edid->established_timings.mfg_rsvd & 0x80) << 9); 1274 int i, modes = 0; 1275 struct detailed_mode_closure closure = { 1276 connector, edid, 0, 0, 0 1277 }; 1278 1279 for (i = 0; i <= EDID_EST_TIMINGS; i++) { 1280 if (est_bits & (1<<i)) { 1281 struct drm_display_mode *newmode; 1282 newmode = drm_mode_duplicate(dev, &edid_est_modes[i]); 1283 if (newmode) { 1284 drm_mode_probed_add(connector, newmode); 1285 modes++; 1286 } 1287 } 1288 } 1289 1290 if (version_greater(edid, 1, 0)) 1291 drm_for_each_detailed_block((u8 *)edid, 1292 do_established_modes, &closure); 1293 1294 return modes + closure.modes; 1295 } 1296 1297 static void 1298 do_standard_modes(struct detailed_timing *timing, void *c) 1299 { 1300 struct detailed_mode_closure *closure = c; 1301 struct detailed_non_pixel *data = &timing->data.other_data; 1302 struct drm_connector *connector = closure->connector; 1303 struct edid *edid = closure->edid; 1304 1305 if (data->type == EDID_DETAIL_STD_MODES) { 1306 int i; 1307 for (i = 0; i < 6; i++) { 1308 struct std_timing *std; 1309 struct drm_display_mode *newmode; 1310 1311 std = &data->data.timings[i]; 1312 newmode = drm_mode_std(connector, edid, std, 1313 edid->revision); 1314 if (newmode) { 1315 drm_mode_probed_add(connector, newmode); 1316 closure->modes++; 1317 } 1318 } 1319 } 1320 } 1321 1322 /** 1323 * add_standard_modes - get std. modes from EDID and add them 1324 * @edid: EDID block to scan 1325 * 1326 * Standard modes can be calculated using the appropriate standard (DMT, 1327 * GTF or CVT. Grab them from @edid and add them to the list. 1328 */ 1329 static int 1330 add_standard_modes(struct drm_connector *connector, struct edid *edid) 1331 { 1332 int i, modes = 0; 1333 struct detailed_mode_closure closure = { 1334 connector, edid, 0, 0, 0 1335 }; 1336 1337 for (i = 0; i < EDID_STD_TIMINGS; i++) { 1338 struct drm_display_mode *newmode; 1339 1340 newmode = drm_mode_std(connector, edid, 1341 &edid->standard_timings[i], 1342 edid->revision); 1343 if (newmode) { 1344 drm_mode_probed_add(connector, newmode); 1345 modes++; 1346 } 1347 } 1348 1349 if (version_greater(edid, 1, 0)) 1350 drm_for_each_detailed_block((u8 *)edid, do_standard_modes, 1351 &closure); 1352 1353 /* XXX should also look for standard codes in VTB blocks */ 1354 1355 return modes + closure.modes; 1356 } 1357 1358 static int drm_cvt_modes(struct drm_connector *connector, 1359 struct detailed_timing *timing) 1360 { 1361 int i, j, modes = 0; 1362 struct drm_display_mode *newmode; 1363 struct drm_device *dev = connector->dev; 1364 struct cvt_timing *cvt; 1365 const int rates[] = { 60, 85, 75, 60, 50 }; 1366 const u8 empty[3] = { 0, 0, 0 }; 1367 1368 for (i = 0; i < 4; i++) { 1369 int uninitialized_var(width), height; 1370 cvt = &(timing->data.other_data.data.cvt[i]); 1371 1372 if (!memcmp(cvt->code, empty, 3)) 1373 continue; 1374 1375 height = (cvt->code[0] + ((cvt->code[1] & 0xf0) << 4) + 1) * 2; 1376 switch (cvt->code[1] & 0x0c) { 1377 case 0x00: 1378 width = height * 4 / 3; 1379 break; 1380 case 0x04: 1381 width = height * 16 / 9; 1382 break; 1383 case 0x08: 1384 width = height * 16 / 10; 1385 break; 1386 case 0x0c: 1387 width = height * 15 / 9; 1388 break; 1389 } 1390 1391 for (j = 1; j < 5; j++) { 1392 if (cvt->code[2] & (1 << j)) { 1393 newmode = drm_cvt_mode(dev, width, height, 1394 rates[j], j == 0, 1395 false, false); 1396 if (newmode) { 1397 drm_mode_probed_add(connector, newmode); 1398 modes++; 1399 } 1400 } 1401 } 1402 } 1403 1404 return modes; 1405 } 1406 1407 static void 1408 do_cvt_mode(struct detailed_timing *timing, void *c) 1409 { 1410 struct detailed_mode_closure *closure = c; 1411 struct detailed_non_pixel *data = &timing->data.other_data; 1412 1413 if (data->type == EDID_DETAIL_CVT_3BYTE) 1414 closure->modes += drm_cvt_modes(closure->connector, timing); 1415 } 1416 1417 static int 1418 add_cvt_modes(struct drm_connector *connector, struct edid *edid) 1419 { 1420 struct detailed_mode_closure closure = { 1421 connector, edid, 0, 0, 0 1422 }; 1423 1424 if (version_greater(edid, 1, 2)) 1425 drm_for_each_detailed_block((u8 *)edid, do_cvt_mode, &closure); 1426 1427 /* XXX should also look for CVT codes in VTB blocks */ 1428 1429 return closure.modes; 1430 } 1431 1432 static void 1433 do_detailed_mode(struct detailed_timing *timing, void *c) 1434 { 1435 struct detailed_mode_closure *closure = c; 1436 struct drm_display_mode *newmode; 1437 1438 if (timing->pixel_clock) { 1439 newmode = drm_mode_detailed(closure->connector->dev, 1440 closure->edid, timing, 1441 closure->quirks); 1442 if (!newmode) 1443 return; 1444 1445 if (closure->preferred) 1446 newmode->type |= DRM_MODE_TYPE_PREFERRED; 1447 1448 drm_mode_probed_add(closure->connector, newmode); 1449 closure->modes++; 1450 closure->preferred = 0; 1451 } 1452 } 1453 1454 /* 1455 * add_detailed_modes - Add modes from detailed timings 1456 * @connector: attached connector 1457 * @edid: EDID block to scan 1458 * @quirks: quirks to apply 1459 */ 1460 static int 1461 add_detailed_modes(struct drm_connector *connector, struct edid *edid, 1462 u32 quirks) 1463 { 1464 struct detailed_mode_closure closure = { 1465 connector, 1466 edid, 1467 1, 1468 quirks, 1469 0 1470 }; 1471 1472 if (closure.preferred && !version_greater(edid, 1, 3)) 1473 closure.preferred = 1474 (edid->features & DRM_EDID_FEATURE_PREFERRED_TIMING); 1475 1476 drm_for_each_detailed_block((u8 *)edid, do_detailed_mode, &closure); 1477 1478 return closure.modes; 1479 } 1480 1481 #define HDMI_IDENTIFIER 0x000C03 1482 #define AUDIO_BLOCK 0x01 1483 #define VIDEO_BLOCK 0x02 1484 #define VENDOR_BLOCK 0x03 1485 #define SPEAKER_BLOCK 0x04 1486 #define EDID_BASIC_AUDIO (1 << 6) 1487 #define EDID_CEA_YCRCB444 (1 << 5) 1488 #define EDID_CEA_YCRCB422 (1 << 4) 1489 1490 /** 1491 * Search EDID for CEA extension block. 1492 */ 1493 u8 *drm_find_cea_extension(struct edid *edid) 1494 { 1495 u8 *edid_ext = NULL; 1496 int i; 1497 1498 /* No EDID or EDID extensions */ 1499 if (edid == NULL || edid->extensions == 0) 1500 return NULL; 1501 1502 /* Find CEA extension */ 1503 for (i = 0; i < edid->extensions; i++) { 1504 edid_ext = (u8 *)edid + EDID_LENGTH * (i + 1); 1505 if (edid_ext[0] == CEA_EXT) 1506 break; 1507 } 1508 1509 if (i == edid->extensions) 1510 return NULL; 1511 1512 return edid_ext; 1513 } 1514 EXPORT_SYMBOL(drm_find_cea_extension); 1515 1516 /* 1517 * Looks for a CEA mode matching given drm_display_mode. 1518 * Returns its CEA Video ID code, or 0 if not found. 1519 */ 1520 u8 drm_match_cea_mode(struct drm_display_mode *to_match) 1521 { 1522 struct drm_display_mode *cea_mode; 1523 u8 mode; 1524 1525 for (mode = 0; mode < drm_num_cea_modes; mode++) { 1526 cea_mode = (struct drm_display_mode *)&edid_cea_modes[mode]; 1527 1528 if (drm_mode_equal(to_match, cea_mode)) 1529 return mode + 1; 1530 } 1531 return 0; 1532 } 1533 EXPORT_SYMBOL(drm_match_cea_mode); 1534 1535 1536 static int 1537 do_cea_modes (struct drm_connector *connector, u8 *db, u8 len) 1538 { 1539 struct drm_device *dev = connector->dev; 1540 u8 * mode, cea_mode; 1541 int modes = 0; 1542 1543 for (mode = db; mode < db + len; mode++) { 1544 cea_mode = (*mode & 127) - 1; /* CEA modes are numbered 1..127 */ 1545 if (cea_mode < drm_num_cea_modes) { 1546 struct drm_display_mode *newmode; 1547 newmode = drm_mode_duplicate(dev, 1548 &edid_cea_modes[cea_mode]); 1549 if (newmode) { 1550 drm_mode_probed_add(connector, newmode); 1551 modes++; 1552 } 1553 } 1554 } 1555 1556 return modes; 1557 } 1558 1559 static int 1560 cea_db_payload_len(const u8 *db) 1561 { 1562 return db[0] & 0x1f; 1563 } 1564 1565 static int 1566 cea_db_tag(const u8 *db) 1567 { 1568 return db[0] >> 5; 1569 } 1570 1571 static int 1572 cea_revision(const u8 *cea) 1573 { 1574 return cea[1]; 1575 } 1576 1577 static int 1578 cea_db_offsets(const u8 *cea, int *start, int *end) 1579 { 1580 /* Data block offset in CEA extension block */ 1581 *start = 4; 1582 *end = cea[2]; 1583 if (*end == 0) 1584 *end = 127; 1585 if (*end < 4 || *end > 127) 1586 return -ERANGE; 1587 return 0; 1588 } 1589 1590 #define for_each_cea_db(cea, i, start, end) \ 1591 for ((i) = (start); (i) < (end) && (i) + cea_db_payload_len(&(cea)[(i)]) < (end); (i) += cea_db_payload_len(&(cea)[(i)]) + 1) 1592 1593 static int 1594 add_cea_modes(struct drm_connector *connector, struct edid *edid) 1595 { 1596 u8 * cea = drm_find_cea_extension(edid); 1597 u8 * db, dbl; 1598 int modes = 0; 1599 1600 if (cea && cea_revision(cea) >= 3) { 1601 int i, start, end; 1602 1603 if (cea_db_offsets(cea, &start, &end)) 1604 return 0; 1605 1606 for_each_cea_db(cea, i, start, end) { 1607 db = &cea[i]; 1608 dbl = cea_db_payload_len(db); 1609 1610 if (cea_db_tag(db) == VIDEO_BLOCK) 1611 modes += do_cea_modes (connector, db+1, dbl); 1612 } 1613 } 1614 1615 return modes; 1616 } 1617 1618 static void 1619 parse_hdmi_vsdb(struct drm_connector *connector, const u8 *db) 1620 { 1621 u8 len = cea_db_payload_len(db); 1622 1623 if (len >= 6) { 1624 connector->eld[5] |= (db[6] >> 7) << 1; /* Supports_AI */ 1625 connector->dvi_dual = db[6] & 1; 1626 } 1627 if (len >= 7) 1628 connector->max_tmds_clock = db[7] * 5; 1629 if (len >= 8) { 1630 connector->latency_present[0] = db[8] >> 7; 1631 connector->latency_present[1] = (db[8] >> 6) & 1; 1632 } 1633 if (len >= 9) 1634 connector->video_latency[0] = db[9]; 1635 if (len >= 10) 1636 connector->audio_latency[0] = db[10]; 1637 if (len >= 11) 1638 connector->video_latency[1] = db[11]; 1639 if (len >= 12) 1640 connector->audio_latency[1] = db[12]; 1641 1642 DRM_DEBUG_KMS("HDMI: DVI dual %d, " 1643 "max TMDS clock %d, " 1644 "latency present %d %d, " 1645 "video latency %d %d, " 1646 "audio latency %d %d\n", 1647 connector->dvi_dual, 1648 connector->max_tmds_clock, 1649 (int) connector->latency_present[0], 1650 (int) connector->latency_present[1], 1651 connector->video_latency[0], 1652 connector->video_latency[1], 1653 connector->audio_latency[0], 1654 connector->audio_latency[1]); 1655 } 1656 1657 static void 1658 monitor_name(struct detailed_timing *t, void *data) 1659 { 1660 if (t->data.other_data.type == EDID_DETAIL_MONITOR_NAME) 1661 *(u8 **)data = t->data.other_data.data.str.str; 1662 } 1663 1664 static bool cea_db_is_hdmi_vsdb(const u8 *db) 1665 { 1666 int hdmi_id; 1667 1668 if (cea_db_tag(db) != VENDOR_BLOCK) 1669 return false; 1670 1671 if (cea_db_payload_len(db) < 5) 1672 return false; 1673 1674 hdmi_id = db[1] | (db[2] << 8) | (db[3] << 16); 1675 1676 return hdmi_id == HDMI_IDENTIFIER; 1677 } 1678 1679 /** 1680 * drm_edid_to_eld - build ELD from EDID 1681 * @connector: connector corresponding to the HDMI/DP sink 1682 * @edid: EDID to parse 1683 * 1684 * Fill the ELD (EDID-Like Data) buffer for passing to the audio driver. 1685 * Some ELD fields are left to the graphics driver caller: 1686 * - Conn_Type 1687 * - HDCP 1688 * - Port_ID 1689 */ 1690 void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid) 1691 { 1692 uint8_t *eld = connector->eld; 1693 u8 *cea; 1694 u8 *name; 1695 u8 *db; 1696 int sad_count = 0; 1697 int mnl; 1698 int dbl; 1699 1700 memset(eld, 0, sizeof(connector->eld)); 1701 1702 cea = drm_find_cea_extension(edid); 1703 if (!cea) { 1704 DRM_DEBUG_KMS("ELD: no CEA Extension found\n"); 1705 return; 1706 } 1707 1708 name = NULL; 1709 drm_for_each_detailed_block((u8 *)edid, monitor_name, &name); 1710 for (mnl = 0; name && mnl < 13; mnl++) { 1711 if (name[mnl] == 0x0a) 1712 break; 1713 eld[20 + mnl] = name[mnl]; 1714 } 1715 eld[4] = (cea[1] << 5) | mnl; 1716 DRM_DEBUG_KMS("ELD monitor %s\n", eld + 20); 1717 1718 eld[0] = 2 << 3; /* ELD version: 2 */ 1719 1720 eld[16] = edid->mfg_id[0]; 1721 eld[17] = edid->mfg_id[1]; 1722 eld[18] = edid->prod_code[0]; 1723 eld[19] = edid->prod_code[1]; 1724 1725 if (cea_revision(cea) >= 3) { 1726 int i, start, end; 1727 1728 if (cea_db_offsets(cea, &start, &end)) { 1729 start = 0; 1730 end = 0; 1731 } 1732 1733 for_each_cea_db(cea, i, start, end) { 1734 db = &cea[i]; 1735 dbl = cea_db_payload_len(db); 1736 1737 switch (cea_db_tag(db)) { 1738 case AUDIO_BLOCK: 1739 /* Audio Data Block, contains SADs */ 1740 sad_count = dbl / 3; 1741 if (dbl >= 1) 1742 memcpy(eld + 20 + mnl, &db[1], dbl); 1743 break; 1744 case SPEAKER_BLOCK: 1745 /* Speaker Allocation Data Block */ 1746 if (dbl >= 1) 1747 eld[7] = db[1]; 1748 break; 1749 case VENDOR_BLOCK: 1750 /* HDMI Vendor-Specific Data Block */ 1751 if (cea_db_is_hdmi_vsdb(db)) 1752 parse_hdmi_vsdb(connector, db); 1753 break; 1754 default: 1755 break; 1756 } 1757 } 1758 } 1759 eld[5] |= sad_count << 4; 1760 eld[2] = (20 + mnl + sad_count * 3 + 3) / 4; 1761 1762 DRM_DEBUG_KMS("ELD size %d, SAD count %d\n", (int)eld[2], sad_count); 1763 } 1764 EXPORT_SYMBOL(drm_edid_to_eld); 1765 1766 /** 1767 * drm_av_sync_delay - HDMI/DP sink audio-video sync delay in millisecond 1768 * @connector: connector associated with the HDMI/DP sink 1769 * @mode: the display mode 1770 */ 1771 int drm_av_sync_delay(struct drm_connector *connector, 1772 struct drm_display_mode *mode) 1773 { 1774 int i = !!(mode->flags & DRM_MODE_FLAG_INTERLACE); 1775 int a, v; 1776 1777 if (!connector->latency_present[0]) 1778 return 0; 1779 if (!connector->latency_present[1]) 1780 i = 0; 1781 1782 a = connector->audio_latency[i]; 1783 v = connector->video_latency[i]; 1784 1785 /* 1786 * HDMI/DP sink doesn't support audio or video? 1787 */ 1788 if (a == 255 || v == 255) 1789 return 0; 1790 1791 /* 1792 * Convert raw EDID values to millisecond. 1793 * Treat unknown latency as 0ms. 1794 */ 1795 if (a) 1796 a = min(2 * (a - 1), 500); 1797 if (v) 1798 v = min(2 * (v - 1), 500); 1799 1800 return max(v - a, 0); 1801 } 1802 EXPORT_SYMBOL(drm_av_sync_delay); 1803 1804 /** 1805 * drm_select_eld - select one ELD from multiple HDMI/DP sinks 1806 * @encoder: the encoder just changed display mode 1807 * @mode: the adjusted display mode 1808 * 1809 * It's possible for one encoder to be associated with multiple HDMI/DP sinks. 1810 * The policy is now hard coded to simply use the first HDMI/DP sink's ELD. 1811 */ 1812 struct drm_connector *drm_select_eld(struct drm_encoder *encoder, 1813 struct drm_display_mode *mode) 1814 { 1815 struct drm_connector *connector; 1816 struct drm_device *dev = encoder->dev; 1817 1818 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 1819 if (connector->encoder == encoder && connector->eld[0]) 1820 return connector; 1821 1822 return NULL; 1823 } 1824 EXPORT_SYMBOL(drm_select_eld); 1825 1826 /** 1827 * drm_detect_hdmi_monitor - detect whether monitor is hdmi. 1828 * @edid: monitor EDID information 1829 * 1830 * Parse the CEA extension according to CEA-861-B. 1831 * Return true if HDMI, false if not or unknown. 1832 */ 1833 bool drm_detect_hdmi_monitor(struct edid *edid) 1834 { 1835 u8 *edid_ext; 1836 int i; 1837 int start_offset, end_offset; 1838 1839 edid_ext = drm_find_cea_extension(edid); 1840 if (!edid_ext) 1841 return false; 1842 1843 if (cea_db_offsets(edid_ext, &start_offset, &end_offset)) 1844 return false; 1845 1846 /* 1847 * Because HDMI identifier is in Vendor Specific Block, 1848 * search it from all data blocks of CEA extension. 1849 */ 1850 for_each_cea_db(edid_ext, i, start_offset, end_offset) { 1851 if (cea_db_is_hdmi_vsdb(&edid_ext[i])) 1852 return true; 1853 } 1854 1855 return false; 1856 } 1857 EXPORT_SYMBOL(drm_detect_hdmi_monitor); 1858 1859 /** 1860 * drm_detect_monitor_audio - check monitor audio capability 1861 * 1862 * Monitor should have CEA extension block. 1863 * If monitor has 'basic audio', but no CEA audio blocks, it's 'basic 1864 * audio' only. If there is any audio extension block and supported 1865 * audio format, assume at least 'basic audio' support, even if 'basic 1866 * audio' is not defined in EDID. 1867 * 1868 */ 1869 bool drm_detect_monitor_audio(struct edid *edid) 1870 { 1871 u8 *edid_ext; 1872 int i, j; 1873 bool has_audio = false; 1874 int start_offset, end_offset; 1875 1876 edid_ext = drm_find_cea_extension(edid); 1877 if (!edid_ext) 1878 goto end; 1879 1880 has_audio = ((edid_ext[3] & EDID_BASIC_AUDIO) != 0); 1881 1882 if (has_audio) { 1883 DRM_DEBUG_KMS("Monitor has basic audio support\n"); 1884 goto end; 1885 } 1886 1887 if (cea_db_offsets(edid_ext, &start_offset, &end_offset)) 1888 goto end; 1889 1890 for_each_cea_db(edid_ext, i, start_offset, end_offset) { 1891 if (cea_db_tag(&edid_ext[i]) == AUDIO_BLOCK) { 1892 has_audio = true; 1893 for (j = 1; j < cea_db_payload_len(&edid_ext[i]) + 1; j += 3) 1894 DRM_DEBUG_KMS("CEA audio format %d\n", 1895 (edid_ext[i + j] >> 3) & 0xf); 1896 goto end; 1897 } 1898 } 1899 end: 1900 return has_audio; 1901 } 1902 EXPORT_SYMBOL(drm_detect_monitor_audio); 1903 1904 /** 1905 * drm_add_display_info - pull display info out if present 1906 * @edid: EDID data 1907 * @info: display info (attached to connector) 1908 * 1909 * Grab any available display info and stuff it into the drm_display_info 1910 * structure that's part of the connector. Useful for tracking bpp and 1911 * color spaces. 1912 */ 1913 static void drm_add_display_info(struct edid *edid, 1914 struct drm_display_info *info) 1915 { 1916 u8 *edid_ext; 1917 1918 info->width_mm = edid->width_cm * 10; 1919 info->height_mm = edid->height_cm * 10; 1920 1921 /* driver figures it out in this case */ 1922 info->bpc = 0; 1923 info->color_formats = 0; 1924 1925 if (edid->revision < 3) 1926 return; 1927 1928 if (!(edid->input & DRM_EDID_INPUT_DIGITAL)) 1929 return; 1930 1931 /* Get data from CEA blocks if present */ 1932 edid_ext = drm_find_cea_extension(edid); 1933 if (edid_ext) { 1934 info->cea_rev = edid_ext[1]; 1935 1936 /* The existence of a CEA block should imply RGB support */ 1937 info->color_formats = DRM_COLOR_FORMAT_RGB444; 1938 if (edid_ext[3] & EDID_CEA_YCRCB444) 1939 info->color_formats |= DRM_COLOR_FORMAT_YCRCB444; 1940 if (edid_ext[3] & EDID_CEA_YCRCB422) 1941 info->color_formats |= DRM_COLOR_FORMAT_YCRCB422; 1942 } 1943 1944 /* Only defined for 1.4 with digital displays */ 1945 if (edid->revision < 4) 1946 return; 1947 1948 switch (edid->input & DRM_EDID_DIGITAL_DEPTH_MASK) { 1949 case DRM_EDID_DIGITAL_DEPTH_6: 1950 info->bpc = 6; 1951 break; 1952 case DRM_EDID_DIGITAL_DEPTH_8: 1953 info->bpc = 8; 1954 break; 1955 case DRM_EDID_DIGITAL_DEPTH_10: 1956 info->bpc = 10; 1957 break; 1958 case DRM_EDID_DIGITAL_DEPTH_12: 1959 info->bpc = 12; 1960 break; 1961 case DRM_EDID_DIGITAL_DEPTH_14: 1962 info->bpc = 14; 1963 break; 1964 case DRM_EDID_DIGITAL_DEPTH_16: 1965 info->bpc = 16; 1966 break; 1967 case DRM_EDID_DIGITAL_DEPTH_UNDEF: 1968 default: 1969 info->bpc = 0; 1970 break; 1971 } 1972 1973 info->color_formats |= DRM_COLOR_FORMAT_RGB444; 1974 if (edid->features & DRM_EDID_FEATURE_RGB_YCRCB444) 1975 info->color_formats |= DRM_COLOR_FORMAT_YCRCB444; 1976 if (edid->features & DRM_EDID_FEATURE_RGB_YCRCB422) 1977 info->color_formats |= DRM_COLOR_FORMAT_YCRCB422; 1978 } 1979 1980 /** 1981 * drm_add_edid_modes - add modes from EDID data, if available 1982 * @connector: connector we're probing 1983 * @edid: edid data 1984 * 1985 * Add the specified modes to the connector's mode list. 1986 * 1987 * Return number of modes added or 0 if we couldn't find any. 1988 */ 1989 int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid) 1990 { 1991 int num_modes = 0; 1992 u32 quirks; 1993 1994 if (edid == NULL) { 1995 return 0; 1996 } 1997 if (!drm_edid_is_valid(edid)) { 1998 dev_warn(connector->dev->dev, "%s: EDID invalid.\n", 1999 drm_get_connector_name(connector)); 2000 return 0; 2001 } 2002 2003 quirks = edid_get_quirks(edid); 2004 2005 /* 2006 * EDID spec says modes should be preferred in this order: 2007 * - preferred detailed mode 2008 * - other detailed modes from base block 2009 * - detailed modes from extension blocks 2010 * - CVT 3-byte code modes 2011 * - standard timing codes 2012 * - established timing codes 2013 * - modes inferred from GTF or CVT range information 2014 * 2015 * We get this pretty much right. 2016 * 2017 * XXX order for additional mode types in extension blocks? 2018 */ 2019 num_modes += add_detailed_modes(connector, edid, quirks); 2020 num_modes += add_cvt_modes(connector, edid); 2021 num_modes += add_standard_modes(connector, edid); 2022 num_modes += add_established_modes(connector, edid); 2023 num_modes += add_inferred_modes(connector, edid); 2024 num_modes += add_cea_modes(connector, edid); 2025 2026 if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75)) 2027 edid_fixup_preferred(connector, quirks); 2028 2029 drm_add_display_info(edid, &connector->display_info); 2030 2031 return num_modes; 2032 } 2033 EXPORT_SYMBOL(drm_add_edid_modes); 2034 2035 /** 2036 * drm_add_modes_noedid - add modes for the connectors without EDID 2037 * @connector: connector we're probing 2038 * @hdisplay: the horizontal display limit 2039 * @vdisplay: the vertical display limit 2040 * 2041 * Add the specified modes to the connector's mode list. Only when the 2042 * hdisplay/vdisplay is not beyond the given limit, it will be added. 2043 * 2044 * Return number of modes added or 0 if we couldn't find any. 2045 */ 2046 int drm_add_modes_noedid(struct drm_connector *connector, 2047 int hdisplay, int vdisplay) 2048 { 2049 int i, count, num_modes = 0; 2050 struct drm_display_mode *mode; 2051 struct drm_device *dev = connector->dev; 2052 2053 count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode); 2054 if (hdisplay < 0) 2055 hdisplay = 0; 2056 if (vdisplay < 0) 2057 vdisplay = 0; 2058 2059 for (i = 0; i < count; i++) { 2060 const struct drm_display_mode *ptr = &drm_dmt_modes[i]; 2061 if (hdisplay && vdisplay) { 2062 /* 2063 * Only when two are valid, they will be used to check 2064 * whether the mode should be added to the mode list of 2065 * the connector. 2066 */ 2067 if (ptr->hdisplay > hdisplay || 2068 ptr->vdisplay > vdisplay) 2069 continue; 2070 } 2071 if (drm_mode_vrefresh(ptr) > 61) 2072 continue; 2073 mode = drm_mode_duplicate(dev, ptr); 2074 if (mode) { 2075 drm_mode_probed_add(connector, mode); 2076 num_modes++; 2077 } 2078 } 2079 return num_modes; 2080 } 2081 EXPORT_SYMBOL(drm_add_modes_noedid); 2082 2083 /** 2084 * drm_mode_cea_vic - return the CEA-861 VIC of a given mode 2085 * @mode: mode 2086 * 2087 * RETURNS: 2088 * The VIC number, 0 in case it's not a CEA-861 mode. 2089 */ 2090 uint8_t drm_mode_cea_vic(const struct drm_display_mode *mode) 2091 { 2092 uint8_t i; 2093 2094 for (i = 0; i < drm_num_cea_modes; i++) 2095 if (drm_mode_equal(mode, &edid_cea_modes[i])) 2096 return i + 1; 2097 2098 return 0; 2099 } 2100 EXPORT_SYMBOL(drm_mode_cea_vic); 2101