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 "drmP.h" 35 #include "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) 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 DRM_ERROR("EDID checksum is invalid, remainder is %d\n", csum); 188 189 /* allow CEA to slide through, switches mangle this */ 190 if (raw_edid[0] != 0x02) 191 goto bad; 192 } 193 194 /* per-block-type checks */ 195 switch (raw_edid[0]) { 196 case 0: /* base */ 197 if (edid->version != 1) { 198 DRM_ERROR("EDID has major version %d, instead of 1\n", edid->version); 199 goto bad; 200 } 201 202 if (edid->revision > 4) 203 DRM_DEBUG("EDID minor > 4, assuming backward compatibility\n"); 204 break; 205 206 default: 207 break; 208 } 209 210 return 1; 211 212 bad: 213 if (raw_edid) { 214 printk(KERN_ERR "Raw EDID:\n"); 215 print_hex_dump(KERN_ERR, " \t", DUMP_PREFIX_NONE, 16, 1, 216 raw_edid, EDID_LENGTH, false); 217 } 218 return 0; 219 } 220 EXPORT_SYMBOL(drm_edid_block_valid); 221 222 /** 223 * drm_edid_is_valid - sanity check EDID data 224 * @edid: EDID data 225 * 226 * Sanity-check an entire EDID record (including extensions) 227 */ 228 bool drm_edid_is_valid(struct edid *edid) 229 { 230 int i; 231 u8 *raw = (u8 *)edid; 232 233 if (!edid) 234 return false; 235 236 for (i = 0; i <= edid->extensions; i++) 237 if (!drm_edid_block_valid(raw + i * EDID_LENGTH, i)) 238 return false; 239 240 return true; 241 } 242 EXPORT_SYMBOL(drm_edid_is_valid); 243 244 #define DDC_SEGMENT_ADDR 0x30 245 /** 246 * Get EDID information via I2C. 247 * 248 * \param adapter : i2c device adaptor 249 * \param buf : EDID data buffer to be filled 250 * \param len : EDID data buffer length 251 * \return 0 on success or -1 on failure. 252 * 253 * Try to fetch EDID information by calling i2c driver function. 254 */ 255 static int 256 drm_do_probe_ddc_edid(struct i2c_adapter *adapter, unsigned char *buf, 257 int block, int len) 258 { 259 unsigned char start = block * EDID_LENGTH; 260 int ret, retries = 5; 261 262 /* The core i2c driver will automatically retry the transfer if the 263 * adapter reports EAGAIN. However, we find that bit-banging transfers 264 * are susceptible to errors under a heavily loaded machine and 265 * generate spurious NAKs and timeouts. Retrying the transfer 266 * of the individual block a few times seems to overcome this. 267 */ 268 do { 269 struct i2c_msg msgs[] = { 270 { 271 .addr = DDC_ADDR, 272 .flags = 0, 273 .len = 1, 274 .buf = &start, 275 }, { 276 .addr = DDC_ADDR, 277 .flags = I2C_M_RD, 278 .len = len, 279 .buf = buf, 280 } 281 }; 282 ret = i2c_transfer(adapter, msgs, 2); 283 if (ret == -ENXIO) { 284 DRM_DEBUG_KMS("drm: skipping non-existent adapter %s\n", 285 adapter->name); 286 break; 287 } 288 } while (ret != 2 && --retries); 289 290 return ret == 2 ? 0 : -1; 291 } 292 293 static bool drm_edid_is_zero(u8 *in_edid, int length) 294 { 295 int i; 296 u32 *raw_edid = (u32 *)in_edid; 297 298 for (i = 0; i < length / 4; i++) 299 if (*(raw_edid + i) != 0) 300 return false; 301 return true; 302 } 303 304 static u8 * 305 drm_do_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter) 306 { 307 int i, j = 0, valid_extensions = 0; 308 u8 *block, *new; 309 310 if ((block = kmalloc(EDID_LENGTH, GFP_KERNEL)) == NULL) 311 return NULL; 312 313 /* base block fetch */ 314 for (i = 0; i < 4; i++) { 315 if (drm_do_probe_ddc_edid(adapter, block, 0, EDID_LENGTH)) 316 goto out; 317 if (drm_edid_block_valid(block, 0)) 318 break; 319 if (i == 0 && drm_edid_is_zero(block, EDID_LENGTH)) { 320 connector->null_edid_counter++; 321 goto carp; 322 } 323 } 324 if (i == 4) 325 goto carp; 326 327 /* if there's no extensions, we're done */ 328 if (block[0x7e] == 0) 329 return block; 330 331 new = krealloc(block, (block[0x7e] + 1) * EDID_LENGTH, GFP_KERNEL); 332 if (!new) 333 goto out; 334 block = new; 335 336 for (j = 1; j <= block[0x7e]; j++) { 337 for (i = 0; i < 4; i++) { 338 if (drm_do_probe_ddc_edid(adapter, 339 block + (valid_extensions + 1) * EDID_LENGTH, 340 j, EDID_LENGTH)) 341 goto out; 342 if (drm_edid_block_valid(block + (valid_extensions + 1) * EDID_LENGTH, j)) { 343 valid_extensions++; 344 break; 345 } 346 } 347 if (i == 4) 348 dev_warn(connector->dev->dev, 349 "%s: Ignoring invalid EDID block %d.\n", 350 drm_get_connector_name(connector), j); 351 } 352 353 if (valid_extensions != block[0x7e]) { 354 block[EDID_LENGTH-1] += block[0x7e] - valid_extensions; 355 block[0x7e] = valid_extensions; 356 new = krealloc(block, (valid_extensions + 1) * EDID_LENGTH, GFP_KERNEL); 357 if (!new) 358 goto out; 359 block = new; 360 } 361 362 return block; 363 364 carp: 365 dev_warn(connector->dev->dev, "%s: EDID block %d invalid.\n", 366 drm_get_connector_name(connector), j); 367 368 out: 369 kfree(block); 370 return NULL; 371 } 372 373 /** 374 * Probe DDC presence. 375 * 376 * \param adapter : i2c device adaptor 377 * \return 1 on success 378 */ 379 static bool 380 drm_probe_ddc(struct i2c_adapter *adapter) 381 { 382 unsigned char out; 383 384 return (drm_do_probe_ddc_edid(adapter, &out, 0, 1) == 0); 385 } 386 387 /** 388 * drm_get_edid - get EDID data, if available 389 * @connector: connector we're probing 390 * @adapter: i2c adapter to use for DDC 391 * 392 * Poke the given i2c channel to grab EDID data if possible. If found, 393 * attach it to the connector. 394 * 395 * Return edid data or NULL if we couldn't find any. 396 */ 397 struct edid *drm_get_edid(struct drm_connector *connector, 398 struct i2c_adapter *adapter) 399 { 400 struct edid *edid = NULL; 401 402 if (drm_probe_ddc(adapter)) 403 edid = (struct edid *)drm_do_get_edid(connector, adapter); 404 405 connector->display_info.raw_edid = (char *)edid; 406 407 return edid; 408 409 } 410 EXPORT_SYMBOL(drm_get_edid); 411 412 /*** EDID parsing ***/ 413 414 /** 415 * edid_vendor - match a string against EDID's obfuscated vendor field 416 * @edid: EDID to match 417 * @vendor: vendor string 418 * 419 * Returns true if @vendor is in @edid, false otherwise 420 */ 421 static bool edid_vendor(struct edid *edid, char *vendor) 422 { 423 char edid_vendor[3]; 424 425 edid_vendor[0] = ((edid->mfg_id[0] & 0x7c) >> 2) + '@'; 426 edid_vendor[1] = (((edid->mfg_id[0] & 0x3) << 3) | 427 ((edid->mfg_id[1] & 0xe0) >> 5)) + '@'; 428 edid_vendor[2] = (edid->mfg_id[1] & 0x1f) + '@'; 429 430 return !strncmp(edid_vendor, vendor, 3); 431 } 432 433 /** 434 * edid_get_quirks - return quirk flags for a given EDID 435 * @edid: EDID to process 436 * 437 * This tells subsequent routines what fixes they need to apply. 438 */ 439 static u32 edid_get_quirks(struct edid *edid) 440 { 441 struct edid_quirk *quirk; 442 int i; 443 444 for (i = 0; i < ARRAY_SIZE(edid_quirk_list); i++) { 445 quirk = &edid_quirk_list[i]; 446 447 if (edid_vendor(edid, quirk->vendor) && 448 (EDID_PRODUCT_ID(edid) == quirk->product_id)) 449 return quirk->quirks; 450 } 451 452 return 0; 453 } 454 455 #define MODE_SIZE(m) ((m)->hdisplay * (m)->vdisplay) 456 #define MODE_REFRESH_DIFF(m,r) (abs((m)->vrefresh - target_refresh)) 457 458 /** 459 * edid_fixup_preferred - set preferred modes based on quirk list 460 * @connector: has mode list to fix up 461 * @quirks: quirks list 462 * 463 * Walk the mode list for @connector, clearing the preferred status 464 * on existing modes and setting it anew for the right mode ala @quirks. 465 */ 466 static void edid_fixup_preferred(struct drm_connector *connector, 467 u32 quirks) 468 { 469 struct drm_display_mode *t, *cur_mode, *preferred_mode; 470 int target_refresh = 0; 471 472 if (list_empty(&connector->probed_modes)) 473 return; 474 475 if (quirks & EDID_QUIRK_PREFER_LARGE_60) 476 target_refresh = 60; 477 if (quirks & EDID_QUIRK_PREFER_LARGE_75) 478 target_refresh = 75; 479 480 preferred_mode = list_first_entry(&connector->probed_modes, 481 struct drm_display_mode, head); 482 483 list_for_each_entry_safe(cur_mode, t, &connector->probed_modes, head) { 484 cur_mode->type &= ~DRM_MODE_TYPE_PREFERRED; 485 486 if (cur_mode == preferred_mode) 487 continue; 488 489 /* Largest mode is preferred */ 490 if (MODE_SIZE(cur_mode) > MODE_SIZE(preferred_mode)) 491 preferred_mode = cur_mode; 492 493 /* At a given size, try to get closest to target refresh */ 494 if ((MODE_SIZE(cur_mode) == MODE_SIZE(preferred_mode)) && 495 MODE_REFRESH_DIFF(cur_mode, target_refresh) < 496 MODE_REFRESH_DIFF(preferred_mode, target_refresh)) { 497 preferred_mode = cur_mode; 498 } 499 } 500 501 preferred_mode->type |= DRM_MODE_TYPE_PREFERRED; 502 } 503 504 static bool 505 mode_is_rb(const struct drm_display_mode *mode) 506 { 507 return (mode->htotal - mode->hdisplay == 160) && 508 (mode->hsync_end - mode->hdisplay == 80) && 509 (mode->hsync_end - mode->hsync_start == 32) && 510 (mode->vsync_start - mode->vdisplay == 3); 511 } 512 513 /* 514 * drm_mode_find_dmt - Create a copy of a mode if present in DMT 515 * @dev: Device to duplicate against 516 * @hsize: Mode width 517 * @vsize: Mode height 518 * @fresh: Mode refresh rate 519 * @rb: Mode reduced-blanking-ness 520 * 521 * Walk the DMT mode list looking for a match for the given parameters. 522 * Return a newly allocated copy of the mode, or NULL if not found. 523 */ 524 struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev, 525 int hsize, int vsize, int fresh, 526 bool rb) 527 { 528 int i; 529 530 for (i = 0; i < drm_num_dmt_modes; i++) { 531 const struct drm_display_mode *ptr = &drm_dmt_modes[i]; 532 if (hsize != ptr->hdisplay) 533 continue; 534 if (vsize != ptr->vdisplay) 535 continue; 536 if (fresh != drm_mode_vrefresh(ptr)) 537 continue; 538 if (rb != mode_is_rb(ptr)) 539 continue; 540 541 return drm_mode_duplicate(dev, ptr); 542 } 543 544 return NULL; 545 } 546 EXPORT_SYMBOL(drm_mode_find_dmt); 547 548 typedef void detailed_cb(struct detailed_timing *timing, void *closure); 549 550 static void 551 cea_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure) 552 { 553 int i, n = 0; 554 u8 d = ext[0x02]; 555 u8 *det_base = ext + d; 556 557 n = (127 - d) / 18; 558 for (i = 0; i < n; i++) 559 cb((struct detailed_timing *)(det_base + 18 * i), closure); 560 } 561 562 static void 563 vtb_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure) 564 { 565 unsigned int i, n = min((int)ext[0x02], 6); 566 u8 *det_base = ext + 5; 567 568 if (ext[0x01] != 1) 569 return; /* unknown version */ 570 571 for (i = 0; i < n; i++) 572 cb((struct detailed_timing *)(det_base + 18 * i), closure); 573 } 574 575 static void 576 drm_for_each_detailed_block(u8 *raw_edid, detailed_cb *cb, void *closure) 577 { 578 int i; 579 struct edid *edid = (struct edid *)raw_edid; 580 581 if (edid == NULL) 582 return; 583 584 for (i = 0; i < EDID_DETAILED_TIMINGS; i++) 585 cb(&(edid->detailed_timings[i]), closure); 586 587 for (i = 1; i <= raw_edid[0x7e]; i++) { 588 u8 *ext = raw_edid + (i * EDID_LENGTH); 589 switch (*ext) { 590 case CEA_EXT: 591 cea_for_each_detailed_block(ext, cb, closure); 592 break; 593 case VTB_EXT: 594 vtb_for_each_detailed_block(ext, cb, closure); 595 break; 596 default: 597 break; 598 } 599 } 600 } 601 602 static void 603 is_rb(struct detailed_timing *t, void *data) 604 { 605 u8 *r = (u8 *)t; 606 if (r[3] == EDID_DETAIL_MONITOR_RANGE) 607 if (r[15] & 0x10) 608 *(bool *)data = true; 609 } 610 611 /* EDID 1.4 defines this explicitly. For EDID 1.3, we guess, badly. */ 612 static bool 613 drm_monitor_supports_rb(struct edid *edid) 614 { 615 if (edid->revision >= 4) { 616 bool ret = false; 617 drm_for_each_detailed_block((u8 *)edid, is_rb, &ret); 618 return ret; 619 } 620 621 return ((edid->input & DRM_EDID_INPUT_DIGITAL) != 0); 622 } 623 624 static void 625 find_gtf2(struct detailed_timing *t, void *data) 626 { 627 u8 *r = (u8 *)t; 628 if (r[3] == EDID_DETAIL_MONITOR_RANGE && r[10] == 0x02) 629 *(u8 **)data = r; 630 } 631 632 /* Secondary GTF curve kicks in above some break frequency */ 633 static int 634 drm_gtf2_hbreak(struct edid *edid) 635 { 636 u8 *r = NULL; 637 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); 638 return r ? (r[12] * 2) : 0; 639 } 640 641 static int 642 drm_gtf2_2c(struct edid *edid) 643 { 644 u8 *r = NULL; 645 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); 646 return r ? r[13] : 0; 647 } 648 649 static int 650 drm_gtf2_m(struct edid *edid) 651 { 652 u8 *r = NULL; 653 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); 654 return r ? (r[15] << 8) + r[14] : 0; 655 } 656 657 static int 658 drm_gtf2_k(struct edid *edid) 659 { 660 u8 *r = NULL; 661 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); 662 return r ? r[16] : 0; 663 } 664 665 static int 666 drm_gtf2_2j(struct edid *edid) 667 { 668 u8 *r = NULL; 669 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); 670 return r ? r[17] : 0; 671 } 672 673 /** 674 * standard_timing_level - get std. timing level(CVT/GTF/DMT) 675 * @edid: EDID block to scan 676 */ 677 static int standard_timing_level(struct edid *edid) 678 { 679 if (edid->revision >= 2) { 680 if (edid->revision >= 4 && (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF)) 681 return LEVEL_CVT; 682 if (drm_gtf2_hbreak(edid)) 683 return LEVEL_GTF2; 684 return LEVEL_GTF; 685 } 686 return LEVEL_DMT; 687 } 688 689 /* 690 * 0 is reserved. The spec says 0x01 fill for unused timings. Some old 691 * monitors fill with ascii space (0x20) instead. 692 */ 693 static int 694 bad_std_timing(u8 a, u8 b) 695 { 696 return (a == 0x00 && b == 0x00) || 697 (a == 0x01 && b == 0x01) || 698 (a == 0x20 && b == 0x20); 699 } 700 701 /** 702 * drm_mode_std - convert standard mode info (width, height, refresh) into mode 703 * @t: standard timing params 704 * @timing_level: standard timing level 705 * 706 * Take the standard timing params (in this case width, aspect, and refresh) 707 * and convert them into a real mode using CVT/GTF/DMT. 708 */ 709 static struct drm_display_mode * 710 drm_mode_std(struct drm_connector *connector, struct edid *edid, 711 struct std_timing *t, int revision) 712 { 713 struct drm_device *dev = connector->dev; 714 struct drm_display_mode *m, *mode = NULL; 715 int hsize, vsize; 716 int vrefresh_rate; 717 unsigned aspect_ratio = (t->vfreq_aspect & EDID_TIMING_ASPECT_MASK) 718 >> EDID_TIMING_ASPECT_SHIFT; 719 unsigned vfreq = (t->vfreq_aspect & EDID_TIMING_VFREQ_MASK) 720 >> EDID_TIMING_VFREQ_SHIFT; 721 int timing_level = standard_timing_level(edid); 722 723 if (bad_std_timing(t->hsize, t->vfreq_aspect)) 724 return NULL; 725 726 /* According to the EDID spec, the hdisplay = hsize * 8 + 248 */ 727 hsize = t->hsize * 8 + 248; 728 /* vrefresh_rate = vfreq + 60 */ 729 vrefresh_rate = vfreq + 60; 730 /* the vdisplay is calculated based on the aspect ratio */ 731 if (aspect_ratio == 0) { 732 if (revision < 3) 733 vsize = hsize; 734 else 735 vsize = (hsize * 10) / 16; 736 } else if (aspect_ratio == 1) 737 vsize = (hsize * 3) / 4; 738 else if (aspect_ratio == 2) 739 vsize = (hsize * 4) / 5; 740 else 741 vsize = (hsize * 9) / 16; 742 743 /* HDTV hack, part 1 */ 744 if (vrefresh_rate == 60 && 745 ((hsize == 1360 && vsize == 765) || 746 (hsize == 1368 && vsize == 769))) { 747 hsize = 1366; 748 vsize = 768; 749 } 750 751 /* 752 * If this connector already has a mode for this size and refresh 753 * rate (because it came from detailed or CVT info), use that 754 * instead. This way we don't have to guess at interlace or 755 * reduced blanking. 756 */ 757 list_for_each_entry(m, &connector->probed_modes, head) 758 if (m->hdisplay == hsize && m->vdisplay == vsize && 759 drm_mode_vrefresh(m) == vrefresh_rate) 760 return NULL; 761 762 /* HDTV hack, part 2 */ 763 if (hsize == 1366 && vsize == 768 && vrefresh_rate == 60) { 764 mode = drm_cvt_mode(dev, 1366, 768, vrefresh_rate, 0, 0, 765 false); 766 mode->hdisplay = 1366; 767 mode->hsync_start = mode->hsync_start - 1; 768 mode->hsync_end = mode->hsync_end - 1; 769 return mode; 770 } 771 772 /* check whether it can be found in default mode table */ 773 if (drm_monitor_supports_rb(edid)) { 774 mode = drm_mode_find_dmt(dev, hsize, vsize, vrefresh_rate, 775 true); 776 if (mode) 777 return mode; 778 } 779 mode = drm_mode_find_dmt(dev, hsize, vsize, vrefresh_rate, false); 780 if (mode) 781 return mode; 782 783 /* okay, generate it */ 784 switch (timing_level) { 785 case LEVEL_DMT: 786 break; 787 case LEVEL_GTF: 788 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0); 789 break; 790 case LEVEL_GTF2: 791 /* 792 * This is potentially wrong if there's ever a monitor with 793 * more than one ranges section, each claiming a different 794 * secondary GTF curve. Please don't do that. 795 */ 796 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0); 797 if (!mode) 798 return NULL; 799 if (drm_mode_hsync(mode) > drm_gtf2_hbreak(edid)) { 800 drm_mode_destroy(dev, mode); 801 mode = drm_gtf_mode_complex(dev, hsize, vsize, 802 vrefresh_rate, 0, 0, 803 drm_gtf2_m(edid), 804 drm_gtf2_2c(edid), 805 drm_gtf2_k(edid), 806 drm_gtf2_2j(edid)); 807 } 808 break; 809 case LEVEL_CVT: 810 mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0, 811 false); 812 break; 813 } 814 return mode; 815 } 816 817 /* 818 * EDID is delightfully ambiguous about how interlaced modes are to be 819 * encoded. Our internal representation is of frame height, but some 820 * HDTV detailed timings are encoded as field height. 821 * 822 * The format list here is from CEA, in frame size. Technically we 823 * should be checking refresh rate too. Whatever. 824 */ 825 static void 826 drm_mode_do_interlace_quirk(struct drm_display_mode *mode, 827 struct detailed_pixel_timing *pt) 828 { 829 int i; 830 static const struct { 831 int w, h; 832 } cea_interlaced[] = { 833 { 1920, 1080 }, 834 { 720, 480 }, 835 { 1440, 480 }, 836 { 2880, 480 }, 837 { 720, 576 }, 838 { 1440, 576 }, 839 { 2880, 576 }, 840 }; 841 842 if (!(pt->misc & DRM_EDID_PT_INTERLACED)) 843 return; 844 845 for (i = 0; i < ARRAY_SIZE(cea_interlaced); i++) { 846 if ((mode->hdisplay == cea_interlaced[i].w) && 847 (mode->vdisplay == cea_interlaced[i].h / 2)) { 848 mode->vdisplay *= 2; 849 mode->vsync_start *= 2; 850 mode->vsync_end *= 2; 851 mode->vtotal *= 2; 852 mode->vtotal |= 1; 853 } 854 } 855 856 mode->flags |= DRM_MODE_FLAG_INTERLACE; 857 } 858 859 /** 860 * drm_mode_detailed - create a new mode from an EDID detailed timing section 861 * @dev: DRM device (needed to create new mode) 862 * @edid: EDID block 863 * @timing: EDID detailed timing info 864 * @quirks: quirks to apply 865 * 866 * An EDID detailed timing block contains enough info for us to create and 867 * return a new struct drm_display_mode. 868 */ 869 static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev, 870 struct edid *edid, 871 struct detailed_timing *timing, 872 u32 quirks) 873 { 874 struct drm_display_mode *mode; 875 struct detailed_pixel_timing *pt = &timing->data.pixel_data; 876 unsigned hactive = (pt->hactive_hblank_hi & 0xf0) << 4 | pt->hactive_lo; 877 unsigned vactive = (pt->vactive_vblank_hi & 0xf0) << 4 | pt->vactive_lo; 878 unsigned hblank = (pt->hactive_hblank_hi & 0xf) << 8 | pt->hblank_lo; 879 unsigned vblank = (pt->vactive_vblank_hi & 0xf) << 8 | pt->vblank_lo; 880 unsigned hsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc0) << 2 | pt->hsync_offset_lo; 881 unsigned hsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x30) << 4 | pt->hsync_pulse_width_lo; 882 unsigned vsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc) >> 2 | pt->vsync_offset_pulse_width_lo >> 4; 883 unsigned vsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x3) << 4 | (pt->vsync_offset_pulse_width_lo & 0xf); 884 885 /* ignore tiny modes */ 886 if (hactive < 64 || vactive < 64) 887 return NULL; 888 889 if (pt->misc & DRM_EDID_PT_STEREO) { 890 printk(KERN_WARNING "stereo mode not supported\n"); 891 return NULL; 892 } 893 if (!(pt->misc & DRM_EDID_PT_SEPARATE_SYNC)) { 894 printk(KERN_WARNING "composite sync not supported\n"); 895 } 896 897 /* it is incorrect if hsync/vsync width is zero */ 898 if (!hsync_pulse_width || !vsync_pulse_width) { 899 DRM_DEBUG_KMS("Incorrect Detailed timing. " 900 "Wrong Hsync/Vsync pulse width\n"); 901 return NULL; 902 } 903 904 if (quirks & EDID_QUIRK_FORCE_REDUCED_BLANKING) { 905 mode = drm_cvt_mode(dev, hactive, vactive, 60, true, false, false); 906 if (!mode) 907 return NULL; 908 909 goto set_size; 910 } 911 912 mode = drm_mode_create(dev); 913 if (!mode) 914 return NULL; 915 916 if (quirks & EDID_QUIRK_135_CLOCK_TOO_HIGH) 917 timing->pixel_clock = cpu_to_le16(1088); 918 919 mode->clock = le16_to_cpu(timing->pixel_clock) * 10; 920 921 mode->hdisplay = hactive; 922 mode->hsync_start = mode->hdisplay + hsync_offset; 923 mode->hsync_end = mode->hsync_start + hsync_pulse_width; 924 mode->htotal = mode->hdisplay + hblank; 925 926 mode->vdisplay = vactive; 927 mode->vsync_start = mode->vdisplay + vsync_offset; 928 mode->vsync_end = mode->vsync_start + vsync_pulse_width; 929 mode->vtotal = mode->vdisplay + vblank; 930 931 /* Some EDIDs have bogus h/vtotal values */ 932 if (mode->hsync_end > mode->htotal) 933 mode->htotal = mode->hsync_end + 1; 934 if (mode->vsync_end > mode->vtotal) 935 mode->vtotal = mode->vsync_end + 1; 936 937 drm_mode_do_interlace_quirk(mode, pt); 938 939 if (quirks & EDID_QUIRK_DETAILED_SYNC_PP) { 940 pt->misc |= DRM_EDID_PT_HSYNC_POSITIVE | DRM_EDID_PT_VSYNC_POSITIVE; 941 } 942 943 mode->flags |= (pt->misc & DRM_EDID_PT_HSYNC_POSITIVE) ? 944 DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC; 945 mode->flags |= (pt->misc & DRM_EDID_PT_VSYNC_POSITIVE) ? 946 DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC; 947 948 set_size: 949 mode->width_mm = pt->width_mm_lo | (pt->width_height_mm_hi & 0xf0) << 4; 950 mode->height_mm = pt->height_mm_lo | (pt->width_height_mm_hi & 0xf) << 8; 951 952 if (quirks & EDID_QUIRK_DETAILED_IN_CM) { 953 mode->width_mm *= 10; 954 mode->height_mm *= 10; 955 } 956 957 if (quirks & EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE) { 958 mode->width_mm = edid->width_cm * 10; 959 mode->height_mm = edid->height_cm * 10; 960 } 961 962 mode->type = DRM_MODE_TYPE_DRIVER; 963 drm_mode_set_name(mode); 964 965 return mode; 966 } 967 968 static bool 969 mode_in_hsync_range(const struct drm_display_mode *mode, 970 struct edid *edid, u8 *t) 971 { 972 int hsync, hmin, hmax; 973 974 hmin = t[7]; 975 if (edid->revision >= 4) 976 hmin += ((t[4] & 0x04) ? 255 : 0); 977 hmax = t[8]; 978 if (edid->revision >= 4) 979 hmax += ((t[4] & 0x08) ? 255 : 0); 980 hsync = drm_mode_hsync(mode); 981 982 return (hsync <= hmax && hsync >= hmin); 983 } 984 985 static bool 986 mode_in_vsync_range(const struct drm_display_mode *mode, 987 struct edid *edid, u8 *t) 988 { 989 int vsync, vmin, vmax; 990 991 vmin = t[5]; 992 if (edid->revision >= 4) 993 vmin += ((t[4] & 0x01) ? 255 : 0); 994 vmax = t[6]; 995 if (edid->revision >= 4) 996 vmax += ((t[4] & 0x02) ? 255 : 0); 997 vsync = drm_mode_vrefresh(mode); 998 999 return (vsync <= vmax && vsync >= vmin); 1000 } 1001 1002 static u32 1003 range_pixel_clock(struct edid *edid, u8 *t) 1004 { 1005 /* unspecified */ 1006 if (t[9] == 0 || t[9] == 255) 1007 return 0; 1008 1009 /* 1.4 with CVT support gives us real precision, yay */ 1010 if (edid->revision >= 4 && t[10] == 0x04) 1011 return (t[9] * 10000) - ((t[12] >> 2) * 250); 1012 1013 /* 1.3 is pathetic, so fuzz up a bit */ 1014 return t[9] * 10000 + 5001; 1015 } 1016 1017 static bool 1018 mode_in_range(const struct drm_display_mode *mode, struct edid *edid, 1019 struct detailed_timing *timing) 1020 { 1021 u32 max_clock; 1022 u8 *t = (u8 *)timing; 1023 1024 if (!mode_in_hsync_range(mode, edid, t)) 1025 return false; 1026 1027 if (!mode_in_vsync_range(mode, edid, t)) 1028 return false; 1029 1030 if ((max_clock = range_pixel_clock(edid, t))) 1031 if (mode->clock > max_clock) 1032 return false; 1033 1034 /* 1.4 max horizontal check */ 1035 if (edid->revision >= 4 && t[10] == 0x04) 1036 if (t[13] && mode->hdisplay > 8 * (t[13] + (256 * (t[12]&0x3)))) 1037 return false; 1038 1039 if (mode_is_rb(mode) && !drm_monitor_supports_rb(edid)) 1040 return false; 1041 1042 return true; 1043 } 1044 1045 static bool valid_inferred_mode(const struct drm_connector *connector, 1046 const struct drm_display_mode *mode) 1047 { 1048 struct drm_display_mode *m; 1049 bool ok = false; 1050 1051 list_for_each_entry(m, &connector->probed_modes, head) { 1052 if (mode->hdisplay == m->hdisplay && 1053 mode->vdisplay == m->vdisplay && 1054 drm_mode_vrefresh(mode) == drm_mode_vrefresh(m)) 1055 return false; /* duplicated */ 1056 if (mode->hdisplay <= m->hdisplay && 1057 mode->vdisplay <= m->vdisplay) 1058 ok = true; 1059 } 1060 return ok; 1061 } 1062 1063 static int 1064 drm_dmt_modes_for_range(struct drm_connector *connector, struct edid *edid, 1065 struct detailed_timing *timing) 1066 { 1067 int i, modes = 0; 1068 struct drm_display_mode *newmode; 1069 struct drm_device *dev = connector->dev; 1070 1071 for (i = 0; i < drm_num_dmt_modes; i++) { 1072 if (mode_in_range(drm_dmt_modes + i, edid, timing) && 1073 valid_inferred_mode(connector, drm_dmt_modes + i)) { 1074 newmode = drm_mode_duplicate(dev, &drm_dmt_modes[i]); 1075 if (newmode) { 1076 drm_mode_probed_add(connector, newmode); 1077 modes++; 1078 } 1079 } 1080 } 1081 1082 return modes; 1083 } 1084 1085 /* fix up 1366x768 mode from 1368x768; 1086 * GFT/CVT can't express 1366 width which isn't dividable by 8 1087 */ 1088 static void fixup_mode_1366x768(struct drm_display_mode *mode) 1089 { 1090 if (mode->hdisplay == 1368 && mode->vdisplay == 768) { 1091 mode->hdisplay = 1366; 1092 mode->hsync_start--; 1093 mode->hsync_end--; 1094 drm_mode_set_name(mode); 1095 } 1096 } 1097 1098 static int 1099 drm_gtf_modes_for_range(struct drm_connector *connector, struct edid *edid, 1100 struct detailed_timing *timing) 1101 { 1102 int i, modes = 0; 1103 struct drm_display_mode *newmode; 1104 struct drm_device *dev = connector->dev; 1105 1106 for (i = 0; i < num_extra_modes; i++) { 1107 const struct minimode *m = &extra_modes[i]; 1108 newmode = drm_gtf_mode(dev, m->w, m->h, m->r, 0, 0); 1109 if (!newmode) 1110 return modes; 1111 1112 fixup_mode_1366x768(newmode); 1113 if (!mode_in_range(newmode, edid, timing) || 1114 !valid_inferred_mode(connector, newmode)) { 1115 drm_mode_destroy(dev, newmode); 1116 continue; 1117 } 1118 1119 drm_mode_probed_add(connector, newmode); 1120 modes++; 1121 } 1122 1123 return modes; 1124 } 1125 1126 static int 1127 drm_cvt_modes_for_range(struct drm_connector *connector, struct edid *edid, 1128 struct detailed_timing *timing) 1129 { 1130 int i, modes = 0; 1131 struct drm_display_mode *newmode; 1132 struct drm_device *dev = connector->dev; 1133 bool rb = drm_monitor_supports_rb(edid); 1134 1135 for (i = 0; i < num_extra_modes; i++) { 1136 const struct minimode *m = &extra_modes[i]; 1137 newmode = drm_cvt_mode(dev, m->w, m->h, m->r, rb, 0, 0); 1138 if (!newmode) 1139 return modes; 1140 1141 fixup_mode_1366x768(newmode); 1142 if (!mode_in_range(newmode, edid, timing) || 1143 !valid_inferred_mode(connector, newmode)) { 1144 drm_mode_destroy(dev, newmode); 1145 continue; 1146 } 1147 1148 drm_mode_probed_add(connector, newmode); 1149 modes++; 1150 } 1151 1152 return modes; 1153 } 1154 1155 static void 1156 do_inferred_modes(struct detailed_timing *timing, void *c) 1157 { 1158 struct detailed_mode_closure *closure = c; 1159 struct detailed_non_pixel *data = &timing->data.other_data; 1160 struct detailed_data_monitor_range *range = &data->data.range; 1161 1162 if (data->type != EDID_DETAIL_MONITOR_RANGE) 1163 return; 1164 1165 closure->modes += drm_dmt_modes_for_range(closure->connector, 1166 closure->edid, 1167 timing); 1168 1169 if (!version_greater(closure->edid, 1, 1)) 1170 return; /* GTF not defined yet */ 1171 1172 switch (range->flags) { 1173 case 0x02: /* secondary gtf, XXX could do more */ 1174 case 0x00: /* default gtf */ 1175 closure->modes += drm_gtf_modes_for_range(closure->connector, 1176 closure->edid, 1177 timing); 1178 break; 1179 case 0x04: /* cvt, only in 1.4+ */ 1180 if (!version_greater(closure->edid, 1, 3)) 1181 break; 1182 1183 closure->modes += drm_cvt_modes_for_range(closure->connector, 1184 closure->edid, 1185 timing); 1186 break; 1187 case 0x01: /* just the ranges, no formula */ 1188 default: 1189 break; 1190 } 1191 } 1192 1193 static int 1194 add_inferred_modes(struct drm_connector *connector, struct edid *edid) 1195 { 1196 struct detailed_mode_closure closure = { 1197 connector, edid, 0, 0, 0 1198 }; 1199 1200 if (version_greater(edid, 1, 0)) 1201 drm_for_each_detailed_block((u8 *)edid, do_inferred_modes, 1202 &closure); 1203 1204 return closure.modes; 1205 } 1206 1207 static int 1208 drm_est3_modes(struct drm_connector *connector, struct detailed_timing *timing) 1209 { 1210 int i, j, m, modes = 0; 1211 struct drm_display_mode *mode; 1212 u8 *est = ((u8 *)timing) + 5; 1213 1214 for (i = 0; i < 6; i++) { 1215 for (j = 7; j > 0; j--) { 1216 m = (i * 8) + (7 - j); 1217 if (m >= ARRAY_SIZE(est3_modes)) 1218 break; 1219 if (est[i] & (1 << j)) { 1220 mode = drm_mode_find_dmt(connector->dev, 1221 est3_modes[m].w, 1222 est3_modes[m].h, 1223 est3_modes[m].r, 1224 est3_modes[m].rb); 1225 if (mode) { 1226 drm_mode_probed_add(connector, mode); 1227 modes++; 1228 } 1229 } 1230 } 1231 } 1232 1233 return modes; 1234 } 1235 1236 static void 1237 do_established_modes(struct detailed_timing *timing, void *c) 1238 { 1239 struct detailed_mode_closure *closure = c; 1240 struct detailed_non_pixel *data = &timing->data.other_data; 1241 1242 if (data->type == EDID_DETAIL_EST_TIMINGS) 1243 closure->modes += drm_est3_modes(closure->connector, timing); 1244 } 1245 1246 /** 1247 * add_established_modes - get est. modes from EDID and add them 1248 * @edid: EDID block to scan 1249 * 1250 * Each EDID block contains a bitmap of the supported "established modes" list 1251 * (defined above). Tease them out and add them to the global modes list. 1252 */ 1253 static int 1254 add_established_modes(struct drm_connector *connector, struct edid *edid) 1255 { 1256 struct drm_device *dev = connector->dev; 1257 unsigned long est_bits = edid->established_timings.t1 | 1258 (edid->established_timings.t2 << 8) | 1259 ((edid->established_timings.mfg_rsvd & 0x80) << 9); 1260 int i, modes = 0; 1261 struct detailed_mode_closure closure = { 1262 connector, edid, 0, 0, 0 1263 }; 1264 1265 for (i = 0; i <= EDID_EST_TIMINGS; i++) { 1266 if (est_bits & (1<<i)) { 1267 struct drm_display_mode *newmode; 1268 newmode = drm_mode_duplicate(dev, &edid_est_modes[i]); 1269 if (newmode) { 1270 drm_mode_probed_add(connector, newmode); 1271 modes++; 1272 } 1273 } 1274 } 1275 1276 if (version_greater(edid, 1, 0)) 1277 drm_for_each_detailed_block((u8 *)edid, 1278 do_established_modes, &closure); 1279 1280 return modes + closure.modes; 1281 } 1282 1283 static void 1284 do_standard_modes(struct detailed_timing *timing, void *c) 1285 { 1286 struct detailed_mode_closure *closure = c; 1287 struct detailed_non_pixel *data = &timing->data.other_data; 1288 struct drm_connector *connector = closure->connector; 1289 struct edid *edid = closure->edid; 1290 1291 if (data->type == EDID_DETAIL_STD_MODES) { 1292 int i; 1293 for (i = 0; i < 6; i++) { 1294 struct std_timing *std; 1295 struct drm_display_mode *newmode; 1296 1297 std = &data->data.timings[i]; 1298 newmode = drm_mode_std(connector, edid, std, 1299 edid->revision); 1300 if (newmode) { 1301 drm_mode_probed_add(connector, newmode); 1302 closure->modes++; 1303 } 1304 } 1305 } 1306 } 1307 1308 /** 1309 * add_standard_modes - get std. modes from EDID and add them 1310 * @edid: EDID block to scan 1311 * 1312 * Standard modes can be calculated using the appropriate standard (DMT, 1313 * GTF or CVT. Grab them from @edid and add them to the list. 1314 */ 1315 static int 1316 add_standard_modes(struct drm_connector *connector, struct edid *edid) 1317 { 1318 int i, modes = 0; 1319 struct detailed_mode_closure closure = { 1320 connector, edid, 0, 0, 0 1321 }; 1322 1323 for (i = 0; i < EDID_STD_TIMINGS; i++) { 1324 struct drm_display_mode *newmode; 1325 1326 newmode = drm_mode_std(connector, edid, 1327 &edid->standard_timings[i], 1328 edid->revision); 1329 if (newmode) { 1330 drm_mode_probed_add(connector, newmode); 1331 modes++; 1332 } 1333 } 1334 1335 if (version_greater(edid, 1, 0)) 1336 drm_for_each_detailed_block((u8 *)edid, do_standard_modes, 1337 &closure); 1338 1339 /* XXX should also look for standard codes in VTB blocks */ 1340 1341 return modes + closure.modes; 1342 } 1343 1344 static int drm_cvt_modes(struct drm_connector *connector, 1345 struct detailed_timing *timing) 1346 { 1347 int i, j, modes = 0; 1348 struct drm_display_mode *newmode; 1349 struct drm_device *dev = connector->dev; 1350 struct cvt_timing *cvt; 1351 const int rates[] = { 60, 85, 75, 60, 50 }; 1352 const u8 empty[3] = { 0, 0, 0 }; 1353 1354 for (i = 0; i < 4; i++) { 1355 int uninitialized_var(width), height; 1356 cvt = &(timing->data.other_data.data.cvt[i]); 1357 1358 if (!memcmp(cvt->code, empty, 3)) 1359 continue; 1360 1361 height = (cvt->code[0] + ((cvt->code[1] & 0xf0) << 4) + 1) * 2; 1362 switch (cvt->code[1] & 0x0c) { 1363 case 0x00: 1364 width = height * 4 / 3; 1365 break; 1366 case 0x04: 1367 width = height * 16 / 9; 1368 break; 1369 case 0x08: 1370 width = height * 16 / 10; 1371 break; 1372 case 0x0c: 1373 width = height * 15 / 9; 1374 break; 1375 } 1376 1377 for (j = 1; j < 5; j++) { 1378 if (cvt->code[2] & (1 << j)) { 1379 newmode = drm_cvt_mode(dev, width, height, 1380 rates[j], j == 0, 1381 false, false); 1382 if (newmode) { 1383 drm_mode_probed_add(connector, newmode); 1384 modes++; 1385 } 1386 } 1387 } 1388 } 1389 1390 return modes; 1391 } 1392 1393 static void 1394 do_cvt_mode(struct detailed_timing *timing, void *c) 1395 { 1396 struct detailed_mode_closure *closure = c; 1397 struct detailed_non_pixel *data = &timing->data.other_data; 1398 1399 if (data->type == EDID_DETAIL_CVT_3BYTE) 1400 closure->modes += drm_cvt_modes(closure->connector, timing); 1401 } 1402 1403 static int 1404 add_cvt_modes(struct drm_connector *connector, struct edid *edid) 1405 { 1406 struct detailed_mode_closure closure = { 1407 connector, edid, 0, 0, 0 1408 }; 1409 1410 if (version_greater(edid, 1, 2)) 1411 drm_for_each_detailed_block((u8 *)edid, do_cvt_mode, &closure); 1412 1413 /* XXX should also look for CVT codes in VTB blocks */ 1414 1415 return closure.modes; 1416 } 1417 1418 static void 1419 do_detailed_mode(struct detailed_timing *timing, void *c) 1420 { 1421 struct detailed_mode_closure *closure = c; 1422 struct drm_display_mode *newmode; 1423 1424 if (timing->pixel_clock) { 1425 newmode = drm_mode_detailed(closure->connector->dev, 1426 closure->edid, timing, 1427 closure->quirks); 1428 if (!newmode) 1429 return; 1430 1431 if (closure->preferred) 1432 newmode->type |= DRM_MODE_TYPE_PREFERRED; 1433 1434 drm_mode_probed_add(closure->connector, newmode); 1435 closure->modes++; 1436 closure->preferred = 0; 1437 } 1438 } 1439 1440 /* 1441 * add_detailed_modes - Add modes from detailed timings 1442 * @connector: attached connector 1443 * @edid: EDID block to scan 1444 * @quirks: quirks to apply 1445 */ 1446 static int 1447 add_detailed_modes(struct drm_connector *connector, struct edid *edid, 1448 u32 quirks) 1449 { 1450 struct detailed_mode_closure closure = { 1451 connector, 1452 edid, 1453 1, 1454 quirks, 1455 0 1456 }; 1457 1458 if (closure.preferred && !version_greater(edid, 1, 3)) 1459 closure.preferred = 1460 (edid->features & DRM_EDID_FEATURE_PREFERRED_TIMING); 1461 1462 drm_for_each_detailed_block((u8 *)edid, do_detailed_mode, &closure); 1463 1464 return closure.modes; 1465 } 1466 1467 #define HDMI_IDENTIFIER 0x000C03 1468 #define AUDIO_BLOCK 0x01 1469 #define VIDEO_BLOCK 0x02 1470 #define VENDOR_BLOCK 0x03 1471 #define SPEAKER_BLOCK 0x04 1472 #define EDID_BASIC_AUDIO (1 << 6) 1473 #define EDID_CEA_YCRCB444 (1 << 5) 1474 #define EDID_CEA_YCRCB422 (1 << 4) 1475 1476 /** 1477 * Search EDID for CEA extension block. 1478 */ 1479 u8 *drm_find_cea_extension(struct edid *edid) 1480 { 1481 u8 *edid_ext = NULL; 1482 int i; 1483 1484 /* No EDID or EDID extensions */ 1485 if (edid == NULL || edid->extensions == 0) 1486 return NULL; 1487 1488 /* Find CEA extension */ 1489 for (i = 0; i < edid->extensions; i++) { 1490 edid_ext = (u8 *)edid + EDID_LENGTH * (i + 1); 1491 if (edid_ext[0] == CEA_EXT) 1492 break; 1493 } 1494 1495 if (i == edid->extensions) 1496 return NULL; 1497 1498 return edid_ext; 1499 } 1500 EXPORT_SYMBOL(drm_find_cea_extension); 1501 1502 static int 1503 do_cea_modes (struct drm_connector *connector, u8 *db, u8 len) 1504 { 1505 struct drm_device *dev = connector->dev; 1506 u8 * mode, cea_mode; 1507 int modes = 0; 1508 1509 for (mode = db; mode < db + len; mode++) { 1510 cea_mode = (*mode & 127) - 1; /* CEA modes are numbered 1..127 */ 1511 if (cea_mode < drm_num_cea_modes) { 1512 struct drm_display_mode *newmode; 1513 newmode = drm_mode_duplicate(dev, 1514 &edid_cea_modes[cea_mode]); 1515 if (newmode) { 1516 drm_mode_probed_add(connector, newmode); 1517 modes++; 1518 } 1519 } 1520 } 1521 1522 return modes; 1523 } 1524 1525 static int 1526 add_cea_modes(struct drm_connector *connector, struct edid *edid) 1527 { 1528 u8 * cea = drm_find_cea_extension(edid); 1529 u8 * db, dbl; 1530 int modes = 0; 1531 1532 if (cea && cea[1] >= 3) { 1533 for (db = cea + 4; db < cea + cea[2]; db += dbl + 1) { 1534 dbl = db[0] & 0x1f; 1535 if (((db[0] & 0xe0) >> 5) == VIDEO_BLOCK) 1536 modes += do_cea_modes (connector, db+1, dbl); 1537 } 1538 } 1539 1540 return modes; 1541 } 1542 1543 static void 1544 parse_hdmi_vsdb(struct drm_connector *connector, uint8_t *db) 1545 { 1546 connector->eld[5] |= (db[6] >> 7) << 1; /* Supports_AI */ 1547 1548 connector->dvi_dual = db[6] & 1; 1549 connector->max_tmds_clock = db[7] * 5; 1550 1551 connector->latency_present[0] = db[8] >> 7; 1552 connector->latency_present[1] = (db[8] >> 6) & 1; 1553 connector->video_latency[0] = db[9]; 1554 connector->audio_latency[0] = db[10]; 1555 connector->video_latency[1] = db[11]; 1556 connector->audio_latency[1] = db[12]; 1557 1558 DRM_LOG_KMS("HDMI: DVI dual %d, " 1559 "max TMDS clock %d, " 1560 "latency present %d %d, " 1561 "video latency %d %d, " 1562 "audio latency %d %d\n", 1563 connector->dvi_dual, 1564 connector->max_tmds_clock, 1565 (int) connector->latency_present[0], 1566 (int) connector->latency_present[1], 1567 connector->video_latency[0], 1568 connector->video_latency[1], 1569 connector->audio_latency[0], 1570 connector->audio_latency[1]); 1571 } 1572 1573 static void 1574 monitor_name(struct detailed_timing *t, void *data) 1575 { 1576 if (t->data.other_data.type == EDID_DETAIL_MONITOR_NAME) 1577 *(u8 **)data = t->data.other_data.data.str.str; 1578 } 1579 1580 /** 1581 * drm_edid_to_eld - build ELD from EDID 1582 * @connector: connector corresponding to the HDMI/DP sink 1583 * @edid: EDID to parse 1584 * 1585 * Fill the ELD (EDID-Like Data) buffer for passing to the audio driver. 1586 * Some ELD fields are left to the graphics driver caller: 1587 * - Conn_Type 1588 * - HDCP 1589 * - Port_ID 1590 */ 1591 void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid) 1592 { 1593 uint8_t *eld = connector->eld; 1594 u8 *cea; 1595 u8 *name; 1596 u8 *db; 1597 int sad_count = 0; 1598 int mnl; 1599 int dbl; 1600 1601 memset(eld, 0, sizeof(connector->eld)); 1602 1603 cea = drm_find_cea_extension(edid); 1604 if (!cea) { 1605 DRM_DEBUG_KMS("ELD: no CEA Extension found\n"); 1606 return; 1607 } 1608 1609 name = NULL; 1610 drm_for_each_detailed_block((u8 *)edid, monitor_name, &name); 1611 for (mnl = 0; name && mnl < 13; mnl++) { 1612 if (name[mnl] == 0x0a) 1613 break; 1614 eld[20 + mnl] = name[mnl]; 1615 } 1616 eld[4] = (cea[1] << 5) | mnl; 1617 DRM_DEBUG_KMS("ELD monitor %s\n", eld + 20); 1618 1619 eld[0] = 2 << 3; /* ELD version: 2 */ 1620 1621 eld[16] = edid->mfg_id[0]; 1622 eld[17] = edid->mfg_id[1]; 1623 eld[18] = edid->prod_code[0]; 1624 eld[19] = edid->prod_code[1]; 1625 1626 if (cea[1] >= 3) 1627 for (db = cea + 4; db < cea + cea[2]; db += dbl + 1) { 1628 dbl = db[0] & 0x1f; 1629 1630 switch ((db[0] & 0xe0) >> 5) { 1631 case AUDIO_BLOCK: 1632 /* Audio Data Block, contains SADs */ 1633 sad_count = dbl / 3; 1634 memcpy(eld + 20 + mnl, &db[1], dbl); 1635 break; 1636 case SPEAKER_BLOCK: 1637 /* Speaker Allocation Data Block */ 1638 eld[7] = db[1]; 1639 break; 1640 case VENDOR_BLOCK: 1641 /* HDMI Vendor-Specific Data Block */ 1642 if (db[1] == 0x03 && db[2] == 0x0c && db[3] == 0) 1643 parse_hdmi_vsdb(connector, db); 1644 break; 1645 default: 1646 break; 1647 } 1648 } 1649 eld[5] |= sad_count << 4; 1650 eld[2] = (20 + mnl + sad_count * 3 + 3) / 4; 1651 1652 DRM_DEBUG_KMS("ELD size %d, SAD count %d\n", (int)eld[2], sad_count); 1653 } 1654 EXPORT_SYMBOL(drm_edid_to_eld); 1655 1656 /** 1657 * drm_av_sync_delay - HDMI/DP sink audio-video sync delay in millisecond 1658 * @connector: connector associated with the HDMI/DP sink 1659 * @mode: the display mode 1660 */ 1661 int drm_av_sync_delay(struct drm_connector *connector, 1662 struct drm_display_mode *mode) 1663 { 1664 int i = !!(mode->flags & DRM_MODE_FLAG_INTERLACE); 1665 int a, v; 1666 1667 if (!connector->latency_present[0]) 1668 return 0; 1669 if (!connector->latency_present[1]) 1670 i = 0; 1671 1672 a = connector->audio_latency[i]; 1673 v = connector->video_latency[i]; 1674 1675 /* 1676 * HDMI/DP sink doesn't support audio or video? 1677 */ 1678 if (a == 255 || v == 255) 1679 return 0; 1680 1681 /* 1682 * Convert raw EDID values to millisecond. 1683 * Treat unknown latency as 0ms. 1684 */ 1685 if (a) 1686 a = min(2 * (a - 1), 500); 1687 if (v) 1688 v = min(2 * (v - 1), 500); 1689 1690 return max(v - a, 0); 1691 } 1692 EXPORT_SYMBOL(drm_av_sync_delay); 1693 1694 /** 1695 * drm_select_eld - select one ELD from multiple HDMI/DP sinks 1696 * @encoder: the encoder just changed display mode 1697 * @mode: the adjusted display mode 1698 * 1699 * It's possible for one encoder to be associated with multiple HDMI/DP sinks. 1700 * The policy is now hard coded to simply use the first HDMI/DP sink's ELD. 1701 */ 1702 struct drm_connector *drm_select_eld(struct drm_encoder *encoder, 1703 struct drm_display_mode *mode) 1704 { 1705 struct drm_connector *connector; 1706 struct drm_device *dev = encoder->dev; 1707 1708 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 1709 if (connector->encoder == encoder && connector->eld[0]) 1710 return connector; 1711 1712 return NULL; 1713 } 1714 EXPORT_SYMBOL(drm_select_eld); 1715 1716 /** 1717 * drm_detect_hdmi_monitor - detect whether monitor is hdmi. 1718 * @edid: monitor EDID information 1719 * 1720 * Parse the CEA extension according to CEA-861-B. 1721 * Return true if HDMI, false if not or unknown. 1722 */ 1723 bool drm_detect_hdmi_monitor(struct edid *edid) 1724 { 1725 u8 *edid_ext; 1726 int i, hdmi_id; 1727 int start_offset, end_offset; 1728 bool is_hdmi = false; 1729 1730 edid_ext = drm_find_cea_extension(edid); 1731 if (!edid_ext) 1732 goto end; 1733 1734 /* Data block offset in CEA extension block */ 1735 start_offset = 4; 1736 end_offset = edid_ext[2]; 1737 1738 /* 1739 * Because HDMI identifier is in Vendor Specific Block, 1740 * search it from all data blocks of CEA extension. 1741 */ 1742 for (i = start_offset; i < end_offset; 1743 /* Increased by data block len */ 1744 i += ((edid_ext[i] & 0x1f) + 1)) { 1745 /* Find vendor specific block */ 1746 if ((edid_ext[i] >> 5) == VENDOR_BLOCK) { 1747 hdmi_id = edid_ext[i + 1] | (edid_ext[i + 2] << 8) | 1748 edid_ext[i + 3] << 16; 1749 /* Find HDMI identifier */ 1750 if (hdmi_id == HDMI_IDENTIFIER) 1751 is_hdmi = true; 1752 break; 1753 } 1754 } 1755 1756 end: 1757 return is_hdmi; 1758 } 1759 EXPORT_SYMBOL(drm_detect_hdmi_monitor); 1760 1761 /** 1762 * drm_detect_monitor_audio - check monitor audio capability 1763 * 1764 * Monitor should have CEA extension block. 1765 * If monitor has 'basic audio', but no CEA audio blocks, it's 'basic 1766 * audio' only. If there is any audio extension block and supported 1767 * audio format, assume at least 'basic audio' support, even if 'basic 1768 * audio' is not defined in EDID. 1769 * 1770 */ 1771 bool drm_detect_monitor_audio(struct edid *edid) 1772 { 1773 u8 *edid_ext; 1774 int i, j; 1775 bool has_audio = false; 1776 int start_offset, end_offset; 1777 1778 edid_ext = drm_find_cea_extension(edid); 1779 if (!edid_ext) 1780 goto end; 1781 1782 has_audio = ((edid_ext[3] & EDID_BASIC_AUDIO) != 0); 1783 1784 if (has_audio) { 1785 DRM_DEBUG_KMS("Monitor has basic audio support\n"); 1786 goto end; 1787 } 1788 1789 /* Data block offset in CEA extension block */ 1790 start_offset = 4; 1791 end_offset = edid_ext[2]; 1792 1793 for (i = start_offset; i < end_offset; 1794 i += ((edid_ext[i] & 0x1f) + 1)) { 1795 if ((edid_ext[i] >> 5) == AUDIO_BLOCK) { 1796 has_audio = true; 1797 for (j = 1; j < (edid_ext[i] & 0x1f); j += 3) 1798 DRM_DEBUG_KMS("CEA audio format %d\n", 1799 (edid_ext[i + j] >> 3) & 0xf); 1800 goto end; 1801 } 1802 } 1803 end: 1804 return has_audio; 1805 } 1806 EXPORT_SYMBOL(drm_detect_monitor_audio); 1807 1808 /** 1809 * drm_add_display_info - pull display info out if present 1810 * @edid: EDID data 1811 * @info: display info (attached to connector) 1812 * 1813 * Grab any available display info and stuff it into the drm_display_info 1814 * structure that's part of the connector. Useful for tracking bpp and 1815 * color spaces. 1816 */ 1817 static void drm_add_display_info(struct edid *edid, 1818 struct drm_display_info *info) 1819 { 1820 u8 *edid_ext; 1821 1822 info->width_mm = edid->width_cm * 10; 1823 info->height_mm = edid->height_cm * 10; 1824 1825 /* driver figures it out in this case */ 1826 info->bpc = 0; 1827 info->color_formats = 0; 1828 1829 if (edid->revision < 3) 1830 return; 1831 1832 if (!(edid->input & DRM_EDID_INPUT_DIGITAL)) 1833 return; 1834 1835 /* Get data from CEA blocks if present */ 1836 edid_ext = drm_find_cea_extension(edid); 1837 if (edid_ext) { 1838 info->cea_rev = edid_ext[1]; 1839 1840 /* The existence of a CEA block should imply RGB support */ 1841 info->color_formats = DRM_COLOR_FORMAT_RGB444; 1842 if (edid_ext[3] & EDID_CEA_YCRCB444) 1843 info->color_formats |= DRM_COLOR_FORMAT_YCRCB444; 1844 if (edid_ext[3] & EDID_CEA_YCRCB422) 1845 info->color_formats |= DRM_COLOR_FORMAT_YCRCB422; 1846 } 1847 1848 /* Only defined for 1.4 with digital displays */ 1849 if (edid->revision < 4) 1850 return; 1851 1852 switch (edid->input & DRM_EDID_DIGITAL_DEPTH_MASK) { 1853 case DRM_EDID_DIGITAL_DEPTH_6: 1854 info->bpc = 6; 1855 break; 1856 case DRM_EDID_DIGITAL_DEPTH_8: 1857 info->bpc = 8; 1858 break; 1859 case DRM_EDID_DIGITAL_DEPTH_10: 1860 info->bpc = 10; 1861 break; 1862 case DRM_EDID_DIGITAL_DEPTH_12: 1863 info->bpc = 12; 1864 break; 1865 case DRM_EDID_DIGITAL_DEPTH_14: 1866 info->bpc = 14; 1867 break; 1868 case DRM_EDID_DIGITAL_DEPTH_16: 1869 info->bpc = 16; 1870 break; 1871 case DRM_EDID_DIGITAL_DEPTH_UNDEF: 1872 default: 1873 info->bpc = 0; 1874 break; 1875 } 1876 1877 info->color_formats |= DRM_COLOR_FORMAT_RGB444; 1878 if (edid->features & DRM_EDID_FEATURE_RGB_YCRCB444) 1879 info->color_formats |= DRM_COLOR_FORMAT_YCRCB444; 1880 if (edid->features & DRM_EDID_FEATURE_RGB_YCRCB422) 1881 info->color_formats |= DRM_COLOR_FORMAT_YCRCB422; 1882 } 1883 1884 /** 1885 * drm_add_edid_modes - add modes from EDID data, if available 1886 * @connector: connector we're probing 1887 * @edid: edid data 1888 * 1889 * Add the specified modes to the connector's mode list. 1890 * 1891 * Return number of modes added or 0 if we couldn't find any. 1892 */ 1893 int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid) 1894 { 1895 int num_modes = 0; 1896 u32 quirks; 1897 1898 if (edid == NULL) { 1899 return 0; 1900 } 1901 if (!drm_edid_is_valid(edid)) { 1902 dev_warn(connector->dev->dev, "%s: EDID invalid.\n", 1903 drm_get_connector_name(connector)); 1904 return 0; 1905 } 1906 1907 quirks = edid_get_quirks(edid); 1908 1909 /* 1910 * EDID spec says modes should be preferred in this order: 1911 * - preferred detailed mode 1912 * - other detailed modes from base block 1913 * - detailed modes from extension blocks 1914 * - CVT 3-byte code modes 1915 * - standard timing codes 1916 * - established timing codes 1917 * - modes inferred from GTF or CVT range information 1918 * 1919 * We get this pretty much right. 1920 * 1921 * XXX order for additional mode types in extension blocks? 1922 */ 1923 num_modes += add_detailed_modes(connector, edid, quirks); 1924 num_modes += add_cvt_modes(connector, edid); 1925 num_modes += add_standard_modes(connector, edid); 1926 num_modes += add_established_modes(connector, edid); 1927 num_modes += add_inferred_modes(connector, edid); 1928 num_modes += add_cea_modes(connector, edid); 1929 1930 if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75)) 1931 edid_fixup_preferred(connector, quirks); 1932 1933 drm_add_display_info(edid, &connector->display_info); 1934 1935 return num_modes; 1936 } 1937 EXPORT_SYMBOL(drm_add_edid_modes); 1938 1939 /** 1940 * drm_add_modes_noedid - add modes for the connectors without EDID 1941 * @connector: connector we're probing 1942 * @hdisplay: the horizontal display limit 1943 * @vdisplay: the vertical display limit 1944 * 1945 * Add the specified modes to the connector's mode list. Only when the 1946 * hdisplay/vdisplay is not beyond the given limit, it will be added. 1947 * 1948 * Return number of modes added or 0 if we couldn't find any. 1949 */ 1950 int drm_add_modes_noedid(struct drm_connector *connector, 1951 int hdisplay, int vdisplay) 1952 { 1953 int i, count, num_modes = 0; 1954 struct drm_display_mode *mode; 1955 struct drm_device *dev = connector->dev; 1956 1957 count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode); 1958 if (hdisplay < 0) 1959 hdisplay = 0; 1960 if (vdisplay < 0) 1961 vdisplay = 0; 1962 1963 for (i = 0; i < count; i++) { 1964 const struct drm_display_mode *ptr = &drm_dmt_modes[i]; 1965 if (hdisplay && vdisplay) { 1966 /* 1967 * Only when two are valid, they will be used to check 1968 * whether the mode should be added to the mode list of 1969 * the connector. 1970 */ 1971 if (ptr->hdisplay > hdisplay || 1972 ptr->vdisplay > vdisplay) 1973 continue; 1974 } 1975 if (drm_mode_vrefresh(ptr) > 61) 1976 continue; 1977 mode = drm_mode_duplicate(dev, ptr); 1978 if (mode) { 1979 drm_mode_probed_add(connector, mode); 1980 num_modes++; 1981 } 1982 } 1983 return num_modes; 1984 } 1985 EXPORT_SYMBOL(drm_add_modes_noedid); 1986