1 /* $OpenBSD: drm_edid.c,v 1.1 2013/03/18 12:36:51 jsg Exp $ */ 2 /* 3 * Copyright (c) 2006 Luc Verhaegen (quirks list) 4 * Copyright (c) 2007-2008 Intel Corporation 5 * Jesse Barnes <jesse.barnes@intel.com> 6 * Copyright 2010 Red Hat, Inc. 7 * 8 * DDC probing routines (drm_ddc_read & drm_do_probe_ddc_edid) originally from 9 * FB layer. 10 * Copyright (C) 2006 Dennis Munsie <dmunsie@cecropia.com> 11 * 12 * Permission is hereby granted, free of charge, to any person obtaining a 13 * copy of this software and associated documentation files (the "Software"), 14 * to deal in the Software without restriction, including without limitation 15 * the rights to use, copy, modify, merge, publish, distribute, sub license, 16 * and/or sell copies of the Software, and to permit persons to whom the 17 * Software is furnished to do so, subject to the following conditions: 18 * 19 * The above copyright notice and this permission notice (including the 20 * next paragraph) shall be included in all copies or substantial portions 21 * of the Software. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 24 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 25 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 26 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 27 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 28 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 29 * DEALINGS IN THE SOFTWARE. 30 */ 31 #include "drmP.h" 32 #include "drm_edid.h" 33 #include "drm_edid_modes.h" 34 35 #include <dev/i2c/i2cvar.h> 36 37 typedef void detailed_cb(struct detailed_timing *timing, void *closure); 38 39 u8 *drm_do_get_edid(struct drm_connector *, struct i2c_controller *); 40 int drm_do_probe_ddc_edid(struct i2c_controller *, unsigned char *, int, 41 int); 42 bool drm_edid_is_zero(u8 *, int); 43 bool edid_vendor(struct edid *, char *); 44 u32 edid_get_quirks(struct edid *); 45 void edid_fixup_preferred(struct drm_connector *, u32); 46 void cea_for_each_detailed_block(u8 *, detailed_cb *, void *); 47 void vtb_for_each_detailed_block(u8 *, detailed_cb *, void *); 48 void drm_for_each_detailed_block(u8 *, detailed_cb *, void *); 49 void is_rb(struct detailed_timing *, void *); 50 bool drm_monitor_supports_rb(struct edid *); 51 void find_gtf2(struct detailed_timing *, void *); 52 int drm_gtf2_hbreak(struct edid *); 53 int drm_gtf2_2c(struct edid *); 54 int drm_gtf2_m(struct edid *); 55 int drm_gtf2_k(struct edid *); 56 int drm_gtf2_2j(struct edid *); 57 int standard_timing_level(struct edid *); 58 int bad_std_timing(u8, u8); 59 struct drm_display_mode *drm_mode_std(struct drm_connector *, struct edid *, 60 struct std_timing *, int); 61 void drm_mode_do_interlace_quirk(struct drm_display_mode *, 62 struct detailed_pixel_timing *); 63 struct drm_display_mode * 64 drm_mode_detailed(struct drm_device *, struct edid *, 65 struct detailed_timing *, u32); 66 bool mode_is_rb(const struct drm_display_mode *); 67 bool mode_in_hsync_range(const struct drm_display_mode *, struct edid *, 68 u8 *); 69 bool mode_in_vsync_range(const struct drm_display_mode *, 70 struct edid *, u8 *); 71 u32 range_pixel_clock(struct edid *, u8 *); 72 bool mode_in_range(const struct drm_display_mode *, struct edid *, 73 struct detailed_timing *); 74 int drm_gtf_modes_for_range(struct drm_connector *, struct edid *, 75 struct detailed_timing *); 76 void do_inferred_modes(struct detailed_timing *, void *); 77 int add_inferred_modes(struct drm_connector *, struct edid *); 78 int drm_est3_modes(struct drm_connector *, struct detailed_timing *); 79 void do_established_modes(struct detailed_timing *, void *); 80 int add_established_modes(struct drm_connector *, struct edid *); 81 void do_standard_modes(struct detailed_timing *, void *); 82 int add_standard_modes(struct drm_connector *, struct edid *); 83 int drm_cvt_modes(struct drm_connector *, struct detailed_timing *); 84 void do_cvt_mode(struct detailed_timing *, void *); 85 int add_cvt_modes(struct drm_connector *, struct edid *); 86 void do_detailed_mode(struct detailed_timing *, void *); 87 int add_detailed_modes(struct drm_connector *, struct edid *, u32); 88 void drm_add_display_info(struct edid *, struct drm_display_info *); 89 void parse_hdmi_vsdb(struct drm_connector *, const u8 *); 90 void monitor_name(struct detailed_timing *, void *); 91 bool valid_inferred_mode(const struct drm_connector *, 92 const struct drm_display_mode *); 93 int drm_dmt_modes_for_range(struct drm_connector *, struct edid *, 94 struct detailed_timing *); 95 void fixup_mode_1366x768(struct drm_display_mode *); 96 int drm_cvt_modes_for_range(struct drm_connector *, struct edid *, 97 struct detailed_timing *); 98 int do_cea_modes (struct drm_connector *, u8 *, u8); 99 int cea_db_payload_len(const u8 *); 100 int cea_db_tag(const u8 *); 101 int cea_revision(const u8 *); 102 int cea_db_offsets(const u8 *, int *, int *); 103 int add_cea_modes(struct drm_connector *, struct edid *); 104 bool cea_db_is_hdmi_vsdb(const u8 *); 105 106 #define version_greater(edid, maj, min) \ 107 (((edid)->version > (maj)) || \ 108 ((edid)->version == (maj) && (edid)->revision > (min))) 109 110 #define EDID_EST_TIMINGS 16 111 #define EDID_STD_TIMINGS 8 112 #define EDID_DETAILED_TIMINGS 4 113 114 /* 115 * EDID blocks out in the wild have a variety of bugs, try to collect 116 * them here (note that userspace may work around broken monitors first, 117 * but fixes should make their way here so that the kernel "just works" 118 * on as many displays as possible). 119 */ 120 121 /* First detailed mode wrong, use largest 60Hz mode */ 122 #define EDID_QUIRK_PREFER_LARGE_60 (1 << 0) 123 /* Reported 135MHz pixel clock is too high, needs adjustment */ 124 #define EDID_QUIRK_135_CLOCK_TOO_HIGH (1 << 1) 125 /* Prefer the largest mode at 75 Hz */ 126 #define EDID_QUIRK_PREFER_LARGE_75 (1 << 2) 127 /* Detail timing is in cm not mm */ 128 #define EDID_QUIRK_DETAILED_IN_CM (1 << 3) 129 /* Detailed timing descriptors have bogus size values, so just take the 130 * maximum size and use that. 131 */ 132 #define EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE (1 << 4) 133 /* Monitor forgot to set the first detailed is preferred bit. */ 134 #define EDID_QUIRK_FIRST_DETAILED_PREFERRED (1 << 5) 135 /* use +hsync +vsync for detailed mode */ 136 #define EDID_QUIRK_DETAILED_SYNC_PP (1 << 6) 137 /* Force reduced-blanking timings for detailed modes */ 138 #define EDID_QUIRK_FORCE_REDUCED_BLANKING (1 << 7) 139 140 struct detailed_mode_closure { 141 struct drm_connector *connector; 142 struct edid *edid; 143 bool preferred; 144 u32 quirks; 145 int modes; 146 }; 147 148 #define LEVEL_DMT 0 149 #define LEVEL_GTF 1 150 #define LEVEL_GTF2 2 151 #define LEVEL_CVT 3 152 153 static struct edid_quirk { 154 char vendor[4]; 155 int product_id; 156 u32 quirks; 157 } edid_quirk_list[] = { 158 /* Acer AL1706 */ 159 { "ACR", 44358, EDID_QUIRK_PREFER_LARGE_60 }, 160 /* Acer F51 */ 161 { "API", 0x7602, EDID_QUIRK_PREFER_LARGE_60 }, 162 /* Unknown Acer */ 163 { "ACR", 2423, EDID_QUIRK_FIRST_DETAILED_PREFERRED }, 164 165 /* Belinea 10 15 55 */ 166 { "MAX", 1516, EDID_QUIRK_PREFER_LARGE_60 }, 167 { "MAX", 0x77e, EDID_QUIRK_PREFER_LARGE_60 }, 168 169 /* Envision Peripherals, Inc. EN-7100e */ 170 { "EPI", 59264, EDID_QUIRK_135_CLOCK_TOO_HIGH }, 171 /* Envision EN2028 */ 172 { "EPI", 8232, EDID_QUIRK_PREFER_LARGE_60 }, 173 174 /* Funai Electronics PM36B */ 175 { "FCM", 13600, EDID_QUIRK_PREFER_LARGE_75 | 176 EDID_QUIRK_DETAILED_IN_CM }, 177 178 /* LG Philips LCD LP154W01-A5 */ 179 { "LPL", 0, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE }, 180 { "LPL", 0x2a00, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE }, 181 182 /* Philips 107p5 CRT */ 183 { "PHL", 57364, EDID_QUIRK_FIRST_DETAILED_PREFERRED }, 184 185 /* Proview AY765C */ 186 { "PTS", 765, EDID_QUIRK_FIRST_DETAILED_PREFERRED }, 187 188 /* Samsung SyncMaster 205BW. Note: irony */ 189 { "SAM", 541, EDID_QUIRK_DETAILED_SYNC_PP }, 190 /* Samsung SyncMaster 22[5-6]BW */ 191 { "SAM", 596, EDID_QUIRK_PREFER_LARGE_60 }, 192 { "SAM", 638, EDID_QUIRK_PREFER_LARGE_60 }, 193 194 /* ViewSonic VA2026w */ 195 { "VSC", 5020, EDID_QUIRK_FORCE_REDUCED_BLANKING }, 196 }; 197 198 /*** DDC fetch and block validation ***/ 199 200 static const u8 edid_header[] = { 201 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 202 }; 203 204 /* 205 * Sanity check the header of the base EDID block. Return 8 if the header 206 * is perfect, down to 0 if it's totally wrong. 207 */ 208 int 209 drm_edid_header_is_valid(const u8 *raw_edid) 210 { 211 int i, score = 0; 212 213 for (i = 0; i < sizeof(edid_header); i++) 214 if (raw_edid[i] == edid_header[i]) 215 score++; 216 217 return score; 218 } 219 EXPORT_SYMBOL(drm_edid_header_is_valid); 220 221 /* Minimum number of valid EDID header bytes (0-8, default 6) */ 222 static int edid_fixup = 6; 223 224 /* 225 * Sanity check the EDID block (base or extension). Return 0 if the block 226 * doesn't check out, or 1 if it's valid. 227 */ 228 bool 229 drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid) 230 { 231 int i; 232 u8 csum = 0; 233 struct edid *edid = (struct edid *)raw_edid; 234 235 if (edid_fixup > 8 || edid_fixup < 0) 236 edid_fixup = 6; 237 238 if (block == 0) { 239 int score = drm_edid_header_is_valid(raw_edid); 240 if (score == 8) ; 241 else if (score >= edid_fixup) { 242 DRM_DEBUG("Fixing EDID header, your hardware may be failing\n"); 243 memcpy(raw_edid, edid_header, sizeof(edid_header)); 244 } else { 245 goto bad; 246 } 247 } 248 249 for (i = 0; i < EDID_LENGTH; i++) 250 csum += raw_edid[i]; 251 if (csum) { 252 if (print_bad_edid) { 253 DRM_ERROR("EDID checksum is invalid, remainder is %d\n", csum); 254 } 255 256 /* allow CEA to slide through, switches mangle this */ 257 if (raw_edid[0] != 0x02) 258 goto bad; 259 } 260 261 /* per-block-type checks */ 262 switch (raw_edid[0]) { 263 case 0: /* base */ 264 if (edid->version != 1) { 265 DRM_ERROR("EDID has major version %d, instead of 1\n", edid->version); 266 goto bad; 267 } 268 269 if (edid->revision > 4) 270 DRM_DEBUG("EDID minor > 4, assuming backward compatibility\n"); 271 break; 272 273 default: 274 break; 275 } 276 277 return 1; 278 279 bad: 280 if (raw_edid && print_bad_edid) { 281 printf("Raw EDID:\n"); 282 for (i = 0; i < EDID_LENGTH; i++) { 283 if (i % 16 == 0) 284 printf("\n"); 285 else if (i % 8 == 0) 286 printf(" "); 287 printf("%02x ", raw_edid[i]); 288 } 289 printf("\n"); 290 } 291 return 0; 292 } 293 EXPORT_SYMBOL(drm_edid_block_valid); 294 295 /** 296 * drm_edid_is_valid - sanity check EDID data 297 * @edid: EDID data 298 * 299 * Sanity-check an entire EDID record (including extensions) 300 */ 301 bool 302 drm_edid_is_valid(struct edid *edid) 303 { 304 int i; 305 u8 *raw = (u8 *)edid; 306 307 if (!edid) 308 return false; 309 310 for (i = 0; i <= edid->extensions; i++) 311 if (!drm_edid_block_valid(raw + i * EDID_LENGTH, i, true)) 312 return false; 313 314 return true; 315 } 316 EXPORT_SYMBOL(drm_edid_is_valid); 317 318 #define DDC_SEGMENT_ADDR 0x30 319 /** 320 * Get EDID information via I2C. 321 * 322 * \param adapter : i2c device adaptor 323 * \param buf : EDID data buffer to be filled 324 * \param len : EDID data buffer length 325 * \return 0 on success or -1 on failure. 326 * 327 * Try to fetch EDID information by calling i2c driver function. 328 */ 329 int 330 drm_do_probe_ddc_edid(struct i2c_controller *adapter, unsigned char *buf, 331 int block, int len) 332 { 333 uint8_t cmd = 0; 334 unsigned char start = block * EDID_LENGTH; 335 unsigned char segment = block >> 1; 336 int ret; 337 338 iic_acquire_bus(adapter, 0); 339 if (segment) { 340 ret = iic_exec(adapter, I2C_OP_WRITE_WITH_STOP, 341 DDC_SEGMENT_ADDR, &cmd, 1, &segment, 1, 0); 342 if (ret) 343 return ret; 344 } 345 ret = iic_exec(adapter, I2C_OP_WRITE_WITH_STOP, DDC_ADDR, &cmd, 1, 346 &start, 1, 0); 347 if (ret) 348 return (ret); 349 ret = iic_exec(adapter, I2C_OP_READ_WITH_STOP, DDC_ADDR, &cmd, 1, 350 buf, len, 0); 351 if (ret) 352 return (ret); 353 iic_release_bus(adapter, 0); 354 355 return 0; 356 } 357 358 bool 359 drm_edid_is_zero(u8 *in_edid, int length) 360 { 361 int i; 362 u32 *raw_edid = (u32 *)in_edid; 363 364 for (i = 0; i < length / 4; i++) 365 if (*(raw_edid + i) != 0) 366 return false; 367 return true; 368 } 369 370 u8 * 371 drm_do_get_edid(struct drm_connector *connector, struct i2c_controller *adapter) 372 { 373 int i, j = 0, valid_extensions = 0; 374 u8 *block, *new; 375 bool print_bad_edid = !connector->bad_edid_counter; 376 377 if ((block = malloc(EDID_LENGTH, M_DRM, M_WAITOK)) == NULL) 378 return NULL; 379 380 /* base block fetch */ 381 for (i = 0; i < 4; i++) { 382 if (drm_do_probe_ddc_edid(adapter, block, 0, EDID_LENGTH)) 383 goto out; 384 if (drm_edid_block_valid(block, 0, print_bad_edid)) 385 break; 386 if (i == 0 && drm_edid_is_zero(block, EDID_LENGTH)) { 387 connector->null_edid_counter++; 388 goto carp; 389 } 390 } 391 if (i == 4) 392 goto carp; 393 394 /* if there's no extensions, we're done */ 395 if (block[0x7e] == 0) 396 return block; 397 398 new = malloc((block[0x7e] + 1) * EDID_LENGTH, M_DRM, M_WAITOK); 399 if (!new) 400 goto out; 401 bcopy(block, new, EDID_LENGTH); 402 free(block, M_DRM); 403 block = new; 404 405 for (j = 1; j <= block[0x7e]; j++) { 406 for (i = 0; i < 4; i++) { 407 if (drm_do_probe_ddc_edid(adapter, 408 block + (valid_extensions + 1) * EDID_LENGTH, 409 j, EDID_LENGTH)) 410 goto out; 411 if (drm_edid_block_valid(block + (valid_extensions + 1) * EDID_LENGTH, j, print_bad_edid)) { 412 valid_extensions++; 413 break; 414 } 415 } 416 417 if (i == 4 && print_bad_edid) { 418 printf("%s: Ignoring invalid EDID block %d.\n", 419 drm_get_connector_name(connector), j); 420 421 connector->bad_edid_counter++; 422 } 423 } 424 425 if (valid_extensions != block[0x7e]) { 426 block[EDID_LENGTH-1] += block[0x7e] - valid_extensions; 427 block[0x7e] = valid_extensions; 428 new = malloc((valid_extensions + 1) * EDID_LENGTH, 429 M_DRM, M_WAITOK); 430 if (!new) 431 goto out; 432 bcopy(block, new, (valid_extensions + 1) * EDID_LENGTH); 433 free(block, M_DRM); 434 block = new; 435 } 436 437 return block; 438 439 carp: 440 if (print_bad_edid) { 441 printf("%s: EDID block %d invalid.\n", 442 drm_get_connector_name(connector), j); 443 } 444 connector->bad_edid_counter++; 445 446 out: 447 free(block, M_DRM); 448 return NULL; 449 } 450 451 /** 452 * Probe DDC presence. 453 * 454 * \param adapter : i2c device adaptor 455 * \return 1 on success 456 */ 457 bool 458 drm_probe_ddc(struct i2c_controller *adapter) 459 { 460 unsigned char out; 461 462 return (drm_do_probe_ddc_edid(adapter, &out, 0, 1) == 0); 463 } 464 EXPORT_SYMBOL(drm_probe_ddc); 465 466 /** 467 * drm_get_edid - get EDID data, if available 468 * @connector: connector we're probing 469 * @adapter: i2c adapter to use for DDC 470 * 471 * Poke the given i2c channel to grab EDID data if possible. If found, 472 * attach it to the connector. 473 * 474 * Return edid data or NULL if we couldn't find any. 475 */ 476 struct edid * 477 drm_get_edid(struct drm_connector *connector, 478 struct i2c_controller *adapter) 479 { 480 struct edid *edid = NULL; 481 482 if (drm_probe_ddc(adapter)) 483 edid = (struct edid *)drm_do_get_edid(connector, adapter); 484 485 return edid; 486 } 487 EXPORT_SYMBOL(drm_get_edid); 488 489 /*** EDID parsing ***/ 490 491 /** 492 * edid_vendor - match a string against EDID's obfuscated vendor field 493 * @edid: EDID to match 494 * @vendor: vendor string 495 * 496 * Returns true if @vendor is in @edid, false otherwise 497 */ 498 bool 499 edid_vendor(struct edid *edid, char *vendor) 500 { 501 char edid_vendor[3]; 502 503 edid_vendor[0] = ((edid->mfg_id[0] & 0x7c) >> 2) + '@'; 504 edid_vendor[1] = (((edid->mfg_id[0] & 0x3) << 3) | 505 ((edid->mfg_id[1] & 0xe0) >> 5)) + '@'; 506 edid_vendor[2] = (edid->mfg_id[1] & 0x1f) + '@'; 507 508 return !strncmp(edid_vendor, vendor, 3); 509 } 510 511 /** 512 * edid_get_quirks - return quirk flags for a given EDID 513 * @edid: EDID to process 514 * 515 * This tells subsequent routines what fixes they need to apply. 516 */ 517 u32 518 edid_get_quirks(struct edid *edid) 519 { 520 struct edid_quirk *quirk; 521 int i; 522 523 for (i = 0; i < ARRAY_SIZE(edid_quirk_list); i++) { 524 quirk = &edid_quirk_list[i]; 525 526 if (edid_vendor(edid, quirk->vendor) && 527 (EDID_PRODUCT_ID(edid) == quirk->product_id)) 528 return quirk->quirks; 529 } 530 531 return 0; 532 } 533 534 #define MODE_SIZE(m) ((m)->hdisplay * (m)->vdisplay) 535 #define MODE_REFRESH_DIFF(m,r) (abs((m)->vrefresh - target_refresh)) 536 537 /** 538 * edid_fixup_preferred - set preferred modes based on quirk list 539 * @connector: has mode list to fix up 540 * @quirks: quirks list 541 * 542 * Walk the mode list for @connector, clearing the preferred status 543 * on existing modes and setting it anew for the right mode ala @quirks. 544 */ 545 void 546 edid_fixup_preferred(struct drm_connector *connector, 547 u32 quirks) 548 { 549 struct drm_display_mode *t, *cur_mode, *preferred_mode; 550 int target_refresh = 0; 551 552 if (list_empty(&connector->probed_modes)) 553 return; 554 555 if (quirks & EDID_QUIRK_PREFER_LARGE_60) 556 target_refresh = 60; 557 if (quirks & EDID_QUIRK_PREFER_LARGE_75) 558 target_refresh = 75; 559 560 preferred_mode = list_first_entry(&connector->probed_modes, 561 struct drm_display_mode, head); 562 563 list_for_each_entry_safe(cur_mode, t, &connector->probed_modes, head) { 564 cur_mode->type &= ~DRM_MODE_TYPE_PREFERRED; 565 566 if (cur_mode == preferred_mode) 567 continue; 568 569 /* Largest mode is preferred */ 570 if (MODE_SIZE(cur_mode) > MODE_SIZE(preferred_mode)) 571 preferred_mode = cur_mode; 572 573 /* At a given size, try to get closest to target refresh */ 574 if ((MODE_SIZE(cur_mode) == MODE_SIZE(preferred_mode)) && 575 MODE_REFRESH_DIFF(cur_mode, target_refresh) < 576 MODE_REFRESH_DIFF(preferred_mode, target_refresh)) { 577 preferred_mode = cur_mode; 578 } 579 } 580 581 preferred_mode->type |= DRM_MODE_TYPE_PREFERRED; 582 } 583 584 bool 585 mode_is_rb(const struct drm_display_mode *mode) 586 { 587 return (mode->htotal - mode->hdisplay == 160) && 588 (mode->hsync_end - mode->hdisplay == 80) && 589 (mode->hsync_end - mode->hsync_start == 32) && 590 (mode->vsync_start - mode->vdisplay == 3); 591 } 592 593 /* 594 * drm_mode_find_dmt - Create a copy of a mode if present in DMT 595 * @dev: Device to duplicate against 596 * @hsize: Mode width 597 * @vsize: Mode height 598 * @fresh: Mode refresh rate 599 * @rb: Mode reduced-blanking-ness 600 * 601 * Walk the DMT mode list looking for a match for the given parameters. 602 * Return a newly allocated copy of the mode, or NULL if not found. 603 */ 604 struct drm_display_mode * 605 drm_mode_find_dmt(struct drm_device *dev, 606 int hsize, int vsize, int fresh, 607 bool rb) 608 { 609 int i; 610 611 for (i = 0; i < drm_num_dmt_modes; i++) { 612 const struct drm_display_mode *ptr = &drm_dmt_modes[i]; 613 if (hsize != ptr->hdisplay) 614 continue; 615 if (vsize != ptr->vdisplay) 616 continue; 617 if (fresh != drm_mode_vrefresh(ptr)) 618 continue; 619 if (rb != mode_is_rb(ptr)) 620 continue; 621 622 return drm_mode_duplicate(dev, ptr); 623 } 624 625 return NULL; 626 } 627 EXPORT_SYMBOL(drm_mode_find_dmt); 628 629 void 630 cea_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure) 631 { 632 int i, n = 0; 633 u8 d = ext[0x02]; 634 u8 *det_base = ext + d; 635 636 n = (127 - d) / 18; 637 for (i = 0; i < n; i++) 638 cb((struct detailed_timing *)(det_base + 18 * i), closure); 639 } 640 641 void 642 vtb_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure) 643 { 644 unsigned int i, n = min((int)ext[0x02], 6); 645 u8 *det_base = ext + 5; 646 647 if (ext[0x01] != 1) 648 return; /* unknown version */ 649 650 for (i = 0; i < n; i++) 651 cb((struct detailed_timing *)(det_base + 18 * i), closure); 652 } 653 654 void 655 drm_for_each_detailed_block(u8 *raw_edid, detailed_cb *cb, void *closure) 656 { 657 int i; 658 struct edid *edid = (struct edid *)raw_edid; 659 660 if (edid == NULL) 661 return; 662 663 for (i = 0; i < EDID_DETAILED_TIMINGS; i++) 664 cb(&(edid->detailed_timings[i]), closure); 665 666 for (i = 1; i <= raw_edid[0x7e]; i++) { 667 u8 *ext = raw_edid + (i * EDID_LENGTH); 668 switch (*ext) { 669 case CEA_EXT: 670 cea_for_each_detailed_block(ext, cb, closure); 671 break; 672 case VTB_EXT: 673 vtb_for_each_detailed_block(ext, cb, closure); 674 break; 675 default: 676 break; 677 } 678 } 679 } 680 681 void 682 is_rb(struct detailed_timing *t, void *data) 683 { 684 u8 *r = (u8 *)t; 685 if (r[3] == EDID_DETAIL_MONITOR_RANGE) 686 if (r[15] & 0x10) 687 *(bool *)data = true; 688 } 689 690 /* EDID 1.4 defines this explicitly. For EDID 1.3, we guess, badly. */ 691 bool 692 drm_monitor_supports_rb(struct edid *edid) 693 { 694 if (edid->revision >= 4) { 695 bool ret = false; 696 drm_for_each_detailed_block((u8 *)edid, is_rb, &ret); 697 return ret; 698 } 699 700 return ((edid->input & DRM_EDID_INPUT_DIGITAL) != 0); 701 } 702 703 void 704 find_gtf2(struct detailed_timing *t, void *data) 705 { 706 u8 *r = (u8 *)t; 707 if (r[3] == EDID_DETAIL_MONITOR_RANGE && r[10] == 0x02) 708 *(u8 **)data = r; 709 } 710 711 /* Secondary GTF curve kicks in above some break frequency */ 712 int 713 drm_gtf2_hbreak(struct edid *edid) 714 { 715 u8 *r = NULL; 716 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); 717 return r ? (r[12] * 2) : 0; 718 } 719 720 int 721 drm_gtf2_2c(struct edid *edid) 722 { 723 u8 *r = NULL; 724 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); 725 return r ? r[13] : 0; 726 } 727 728 int 729 drm_gtf2_m(struct edid *edid) 730 { 731 u8 *r = NULL; 732 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); 733 return r ? (r[15] << 8) + r[14] : 0; 734 } 735 736 int 737 drm_gtf2_k(struct edid *edid) 738 { 739 u8 *r = NULL; 740 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); 741 return r ? r[16] : 0; 742 } 743 744 int 745 drm_gtf2_2j(struct edid *edid) 746 { 747 u8 *r = NULL; 748 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); 749 return r ? r[17] : 0; 750 } 751 752 /** 753 * standard_timing_level - get std. timing level(CVT/GTF/DMT) 754 * @edid: EDID block to scan 755 */ 756 int 757 standard_timing_level(struct edid *edid) 758 { 759 if (edid->revision >= 2) { 760 if (edid->revision >= 4 && (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF)) 761 return LEVEL_CVT; 762 if (drm_gtf2_hbreak(edid)) 763 return LEVEL_GTF2; 764 return LEVEL_GTF; 765 } 766 return LEVEL_DMT; 767 } 768 769 /* 770 * 0 is reserved. The spec says 0x01 fill for unused timings. Some old 771 * monitors fill with ascii space (0x20) instead. 772 */ 773 int 774 bad_std_timing(u8 a, u8 b) 775 { 776 return (a == 0x00 && b == 0x00) || 777 (a == 0x01 && b == 0x01) || 778 (a == 0x20 && b == 0x20); 779 } 780 781 /** 782 * drm_mode_std - convert standard mode info (width, height, refresh) into mode 783 * @t: standard timing params 784 * @timing_level: standard timing level 785 * 786 * Take the standard timing params (in this case width, aspect, and refresh) 787 * and convert them into a real mode using CVT/GTF/DMT. 788 */ 789 struct drm_display_mode * 790 drm_mode_std(struct drm_connector *connector, struct edid *edid, 791 struct std_timing *t, int revision) 792 { 793 struct drm_device *dev = connector->dev; 794 struct drm_display_mode *m, *mode = NULL; 795 int hsize, vsize; 796 int vrefresh_rate; 797 unsigned aspect_ratio = (t->vfreq_aspect & EDID_TIMING_ASPECT_MASK) 798 >> EDID_TIMING_ASPECT_SHIFT; 799 unsigned vfreq = (t->vfreq_aspect & EDID_TIMING_VFREQ_MASK) 800 >> EDID_TIMING_VFREQ_SHIFT; 801 int timing_level = standard_timing_level(edid); 802 803 if (bad_std_timing(t->hsize, t->vfreq_aspect)) 804 return NULL; 805 806 /* According to the EDID spec, the hdisplay = hsize * 8 + 248 */ 807 hsize = t->hsize * 8 + 248; 808 /* vrefresh_rate = vfreq + 60 */ 809 vrefresh_rate = vfreq + 60; 810 /* the vdisplay is calculated based on the aspect ratio */ 811 if (aspect_ratio == 0) { 812 if (revision < 3) 813 vsize = hsize; 814 else 815 vsize = (hsize * 10) / 16; 816 } else if (aspect_ratio == 1) 817 vsize = (hsize * 3) / 4; 818 else if (aspect_ratio == 2) 819 vsize = (hsize * 4) / 5; 820 else 821 vsize = (hsize * 9) / 16; 822 823 /* HDTV hack, part 1 */ 824 if (vrefresh_rate == 60 && 825 ((hsize == 1360 && vsize == 765) || 826 (hsize == 1368 && vsize == 769))) { 827 hsize = 1366; 828 vsize = 768; 829 } 830 831 /* 832 * If this connector already has a mode for this size and refresh 833 * rate (because it came from detailed or CVT info), use that 834 * instead. This way we don't have to guess at interlace or 835 * reduced blanking. 836 */ 837 list_for_each_entry(m, &connector->probed_modes, head) 838 if (m->hdisplay == hsize && m->vdisplay == vsize && 839 drm_mode_vrefresh(m) == vrefresh_rate) 840 return NULL; 841 842 /* HDTV hack, part 2 */ 843 if (hsize == 1366 && vsize == 768 && vrefresh_rate == 60) { 844 mode = drm_cvt_mode(dev, 1366, 768, vrefresh_rate, 0, 0, 845 false); 846 mode->hdisplay = 1366; 847 mode->hsync_start = mode->hsync_start - 1; 848 mode->hsync_end = mode->hsync_end - 1; 849 return mode; 850 } 851 852 /* check whether it can be found in default mode table */ 853 if (drm_monitor_supports_rb(edid)) { 854 mode = drm_mode_find_dmt(dev, hsize, vsize, vrefresh_rate, 855 true); 856 if (mode) 857 return mode; 858 } 859 mode = drm_mode_find_dmt(dev, hsize, vsize, vrefresh_rate, false); 860 if (mode) 861 return mode; 862 863 /* okay, generate it */ 864 switch (timing_level) { 865 case LEVEL_DMT: 866 break; 867 case LEVEL_GTF: 868 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0); 869 break; 870 case LEVEL_GTF2: 871 /* 872 * This is potentially wrong if there's ever a monitor with 873 * more than one ranges section, each claiming a different 874 * secondary GTF curve. Please don't do that. 875 */ 876 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0); 877 if (!mode) 878 return NULL; 879 if (drm_mode_hsync(mode) > drm_gtf2_hbreak(edid)) { 880 drm_mode_destroy(dev, mode); 881 mode = drm_gtf_mode_complex(dev, hsize, vsize, 882 vrefresh_rate, 0, 0, 883 drm_gtf2_m(edid), 884 drm_gtf2_2c(edid), 885 drm_gtf2_k(edid), 886 drm_gtf2_2j(edid)); 887 } 888 break; 889 case LEVEL_CVT: 890 mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0, 891 false); 892 break; 893 } 894 return mode; 895 } 896 897 /* 898 * EDID is delightfully ambiguous about how interlaced modes are to be 899 * encoded. Our internal representation is of frame height, but some 900 * HDTV detailed timings are encoded as field height. 901 * 902 * The format list here is from CEA, in frame size. Technically we 903 * should be checking refresh rate too. Whatever. 904 */ 905 void 906 drm_mode_do_interlace_quirk(struct drm_display_mode *mode, 907 struct detailed_pixel_timing *pt) 908 { 909 int i; 910 static const struct { 911 int w, h; 912 } cea_interlaced[] = { 913 { 1920, 1080 }, 914 { 720, 480 }, 915 { 1440, 480 }, 916 { 2880, 480 }, 917 { 720, 576 }, 918 { 1440, 576 }, 919 { 2880, 576 }, 920 }; 921 922 if (!(pt->misc & DRM_EDID_PT_INTERLACED)) 923 return; 924 925 for (i = 0; i < ARRAY_SIZE(cea_interlaced); i++) { 926 if ((mode->hdisplay == cea_interlaced[i].w) && 927 (mode->vdisplay == cea_interlaced[i].h / 2)) { 928 mode->vdisplay *= 2; 929 mode->vsync_start *= 2; 930 mode->vsync_end *= 2; 931 mode->vtotal *= 2; 932 mode->vtotal |= 1; 933 } 934 } 935 936 mode->flags |= DRM_MODE_FLAG_INTERLACE; 937 } 938 939 /** 940 * drm_mode_detailed - create a new mode from an EDID detailed timing section 941 * @dev: DRM device (needed to create new mode) 942 * @edid: EDID block 943 * @timing: EDID detailed timing info 944 * @quirks: quirks to apply 945 * 946 * An EDID detailed timing block contains enough info for us to create and 947 * return a new struct drm_display_mode. 948 */ 949 struct drm_display_mode * 950 drm_mode_detailed(struct drm_device *dev, 951 struct edid *edid, 952 struct detailed_timing *timing, 953 u32 quirks) 954 { 955 struct drm_display_mode *mode; 956 struct detailed_pixel_timing *pt = &timing->data.pixel_data; 957 unsigned hactive = (pt->hactive_hblank_hi & 0xf0) << 4 | pt->hactive_lo; 958 unsigned vactive = (pt->vactive_vblank_hi & 0xf0) << 4 | pt->vactive_lo; 959 unsigned hblank = (pt->hactive_hblank_hi & 0xf) << 8 | pt->hblank_lo; 960 unsigned vblank = (pt->vactive_vblank_hi & 0xf) << 8 | pt->vblank_lo; 961 unsigned hsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc0) << 2 | pt->hsync_offset_lo; 962 unsigned hsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x30) << 4 | pt->hsync_pulse_width_lo; 963 unsigned vsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc) >> 2 | pt->vsync_offset_pulse_width_lo >> 4; 964 unsigned vsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x3) << 4 | (pt->vsync_offset_pulse_width_lo & 0xf); 965 966 /* ignore tiny modes */ 967 if (hactive < 64 || vactive < 64) 968 return NULL; 969 970 if (pt->misc & DRM_EDID_PT_STEREO) { 971 printf("stereo mode not supported\n"); 972 return NULL; 973 } 974 if (!(pt->misc & DRM_EDID_PT_SEPARATE_SYNC)) { 975 printf("composite sync not supported\n"); 976 } 977 978 /* it is incorrect if hsync/vsync width is zero */ 979 if (!hsync_pulse_width || !vsync_pulse_width) { 980 DRM_DEBUG_KMS("Incorrect Detailed timing. " 981 "Wrong Hsync/Vsync pulse width\n"); 982 return NULL; 983 } 984 985 if (quirks & EDID_QUIRK_FORCE_REDUCED_BLANKING) { 986 mode = drm_cvt_mode(dev, hactive, vactive, 60, true, false, false); 987 if (!mode) 988 return NULL; 989 990 goto set_size; 991 } 992 993 mode = drm_mode_create(dev); 994 if (!mode) 995 return NULL; 996 997 if (quirks & EDID_QUIRK_135_CLOCK_TOO_HIGH) 998 timing->pixel_clock = htole16(1088); 999 1000 mode->clock = letoh16(timing->pixel_clock) * 10; 1001 1002 mode->hdisplay = hactive; 1003 mode->hsync_start = mode->hdisplay + hsync_offset; 1004 mode->hsync_end = mode->hsync_start + hsync_pulse_width; 1005 mode->htotal = mode->hdisplay + hblank; 1006 1007 mode->vdisplay = vactive; 1008 mode->vsync_start = mode->vdisplay + vsync_offset; 1009 mode->vsync_end = mode->vsync_start + vsync_pulse_width; 1010 mode->vtotal = mode->vdisplay + vblank; 1011 1012 /* Some EDIDs have bogus h/vtotal values */ 1013 if (mode->hsync_end > mode->htotal) 1014 mode->htotal = mode->hsync_end + 1; 1015 if (mode->vsync_end > mode->vtotal) 1016 mode->vtotal = mode->vsync_end + 1; 1017 1018 drm_mode_do_interlace_quirk(mode, pt); 1019 1020 if (quirks & EDID_QUIRK_DETAILED_SYNC_PP) { 1021 pt->misc |= DRM_EDID_PT_HSYNC_POSITIVE | DRM_EDID_PT_VSYNC_POSITIVE; 1022 } 1023 1024 mode->flags |= (pt->misc & DRM_EDID_PT_HSYNC_POSITIVE) ? 1025 DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC; 1026 mode->flags |= (pt->misc & DRM_EDID_PT_VSYNC_POSITIVE) ? 1027 DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC; 1028 1029 set_size: 1030 mode->width_mm = pt->width_mm_lo | (pt->width_height_mm_hi & 0xf0) << 4; 1031 mode->height_mm = pt->height_mm_lo | (pt->width_height_mm_hi & 0xf) << 8; 1032 1033 if (quirks & EDID_QUIRK_DETAILED_IN_CM) { 1034 mode->width_mm *= 10; 1035 mode->height_mm *= 10; 1036 } 1037 1038 if (quirks & EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE) { 1039 mode->width_mm = edid->width_cm * 10; 1040 mode->height_mm = edid->height_cm * 10; 1041 } 1042 1043 mode->type = DRM_MODE_TYPE_DRIVER; 1044 drm_mode_set_name(mode); 1045 1046 return mode; 1047 } 1048 1049 bool 1050 mode_in_hsync_range(const struct drm_display_mode *mode, 1051 struct edid *edid, u8 *t) 1052 { 1053 int hsync, hmin, hmax; 1054 1055 hmin = t[7]; 1056 if (edid->revision >= 4) 1057 hmin += ((t[4] & 0x04) ? 255 : 0); 1058 hmax = t[8]; 1059 if (edid->revision >= 4) 1060 hmax += ((t[4] & 0x08) ? 255 : 0); 1061 hsync = drm_mode_hsync(mode); 1062 1063 return (hsync <= hmax && hsync >= hmin); 1064 } 1065 1066 bool 1067 mode_in_vsync_range(const struct drm_display_mode *mode, 1068 struct edid *edid, u8 *t) 1069 { 1070 int vsync, vmin, vmax; 1071 1072 vmin = t[5]; 1073 if (edid->revision >= 4) 1074 vmin += ((t[4] & 0x01) ? 255 : 0); 1075 vmax = t[6]; 1076 if (edid->revision >= 4) 1077 vmax += ((t[4] & 0x02) ? 255 : 0); 1078 vsync = drm_mode_vrefresh(mode); 1079 1080 return (vsync <= vmax && vsync >= vmin); 1081 } 1082 1083 u32 1084 range_pixel_clock(struct edid *edid, u8 *t) 1085 { 1086 /* unspecified */ 1087 if (t[9] == 0 || t[9] == 255) 1088 return 0; 1089 1090 /* 1.4 with CVT support gives us real precision, yay */ 1091 if (edid->revision >= 4 && t[10] == 0x04) 1092 return (t[9] * 10000) - ((t[12] >> 2) * 250); 1093 1094 /* 1.3 is pathetic, so fuzz up a bit */ 1095 return t[9] * 10000 + 5001; 1096 } 1097 1098 bool 1099 mode_in_range(const struct drm_display_mode *mode, struct edid *edid, 1100 struct detailed_timing *timing) 1101 { 1102 u32 max_clock; 1103 u8 *t = (u8 *)timing; 1104 1105 if (!mode_in_hsync_range(mode, edid, t)) 1106 return false; 1107 1108 if (!mode_in_vsync_range(mode, edid, t)) 1109 return false; 1110 1111 if ((max_clock = range_pixel_clock(edid, t))) 1112 if (mode->clock > max_clock) 1113 return false; 1114 1115 /* 1.4 max horizontal check */ 1116 if (edid->revision >= 4 && t[10] == 0x04) 1117 if (t[13] && mode->hdisplay > 8 * (t[13] + (256 * (t[12]&0x3)))) 1118 return false; 1119 1120 if (mode_is_rb(mode) && !drm_monitor_supports_rb(edid)) 1121 return false; 1122 1123 return true; 1124 } 1125 1126 bool 1127 valid_inferred_mode(const struct drm_connector *connector, 1128 const struct drm_display_mode *mode) 1129 { 1130 struct drm_display_mode *m; 1131 bool ok = false; 1132 1133 list_for_each_entry(m, &connector->probed_modes, head) { 1134 if (mode->hdisplay == m->hdisplay && 1135 mode->vdisplay == m->vdisplay && 1136 drm_mode_vrefresh(mode) == drm_mode_vrefresh(m)) 1137 return false; /* duplicated */ 1138 if (mode->hdisplay <= m->hdisplay && 1139 mode->vdisplay <= m->vdisplay) 1140 ok = true; 1141 } 1142 return ok; 1143 } 1144 1145 int 1146 drm_dmt_modes_for_range(struct drm_connector *connector, struct edid *edid, 1147 struct detailed_timing *timing) 1148 { 1149 int i, modes = 0; 1150 struct drm_display_mode *newmode; 1151 struct drm_device *dev = connector->dev; 1152 1153 for (i = 0; i < drm_num_dmt_modes; i++) { 1154 if (mode_in_range(drm_dmt_modes + i, edid, timing) && 1155 valid_inferred_mode(connector, drm_dmt_modes + i)) { 1156 newmode = drm_mode_duplicate(dev, &drm_dmt_modes[i]); 1157 if (newmode) { 1158 drm_mode_probed_add(connector, newmode); 1159 modes++; 1160 } 1161 } 1162 } 1163 1164 return modes; 1165 } 1166 1167 /* fix up 1366x768 mode from 1368x768; 1168 * GFT/CVT can't express 1366 width which isn't dividable by 8 1169 */ 1170 void 1171 fixup_mode_1366x768(struct drm_display_mode *mode) 1172 { 1173 if (mode->hdisplay == 1368 && mode->vdisplay == 768) { 1174 mode->hdisplay = 1366; 1175 mode->hsync_start--; 1176 mode->hsync_end--; 1177 drm_mode_set_name(mode); 1178 } 1179 } 1180 1181 int 1182 drm_gtf_modes_for_range(struct drm_connector *connector, struct edid *edid, 1183 struct detailed_timing *timing) 1184 { 1185 int i, modes = 0; 1186 struct drm_display_mode *newmode; 1187 struct drm_device *dev = connector->dev; 1188 1189 for (i = 0; i < num_extra_modes; i++) { 1190 const struct minimode *m = &extra_modes[i]; 1191 newmode = drm_gtf_mode(dev, m->w, m->h, m->r, 0, 0); 1192 if (!newmode) 1193 return modes; 1194 1195 fixup_mode_1366x768(newmode); 1196 if (!mode_in_range(newmode, edid, timing) || 1197 !valid_inferred_mode(connector, newmode)) { 1198 drm_mode_destroy(dev, newmode); 1199 continue; 1200 } 1201 1202 drm_mode_probed_add(connector, newmode); 1203 modes++; 1204 } 1205 1206 return modes; 1207 } 1208 1209 int 1210 drm_cvt_modes_for_range(struct drm_connector *connector, struct edid *edid, 1211 struct detailed_timing *timing) 1212 { 1213 int i, modes = 0; 1214 struct drm_display_mode *newmode; 1215 struct drm_device *dev = connector->dev; 1216 bool rb = drm_monitor_supports_rb(edid); 1217 1218 for (i = 0; i < num_extra_modes; i++) { 1219 const struct minimode *m = &extra_modes[i]; 1220 newmode = drm_cvt_mode(dev, m->w, m->h, m->r, rb, 0, 0); 1221 if (!newmode) 1222 return modes; 1223 1224 fixup_mode_1366x768(newmode); 1225 if (!mode_in_range(newmode, edid, timing) || 1226 !valid_inferred_mode(connector, newmode)) { 1227 drm_mode_destroy(dev, newmode); 1228 continue; 1229 } 1230 1231 drm_mode_probed_add(connector, newmode); 1232 modes++; 1233 } 1234 1235 return modes; 1236 } 1237 1238 void 1239 do_inferred_modes(struct detailed_timing *timing, void *c) 1240 { 1241 struct detailed_mode_closure *closure = c; 1242 struct detailed_non_pixel *data = &timing->data.other_data; 1243 struct detailed_data_monitor_range *range = &data->data.range; 1244 1245 if (data->type != EDID_DETAIL_MONITOR_RANGE) 1246 return; 1247 1248 closure->modes += drm_dmt_modes_for_range(closure->connector, 1249 closure->edid, 1250 timing); 1251 1252 if (!version_greater(closure->edid, 1, 1)) 1253 return; /* GTF not defined yet */ 1254 1255 switch (range->flags) { 1256 case 0x02: /* secondary gtf, XXX could do more */ 1257 case 0x00: /* default gtf */ 1258 closure->modes += drm_gtf_modes_for_range(closure->connector, 1259 closure->edid, 1260 timing); 1261 break; 1262 case 0x04: /* cvt, only in 1.4+ */ 1263 if (!version_greater(closure->edid, 1, 3)) 1264 break; 1265 1266 closure->modes += drm_cvt_modes_for_range(closure->connector, 1267 closure->edid, 1268 timing); 1269 break; 1270 case 0x01: /* just the ranges, no formula */ 1271 default: 1272 break; 1273 } 1274 } 1275 1276 int 1277 add_inferred_modes(struct drm_connector *connector, struct edid *edid) 1278 { 1279 struct detailed_mode_closure closure = { 1280 connector, edid, 0, 0, 0 1281 }; 1282 1283 if (version_greater(edid, 1, 0)) 1284 drm_for_each_detailed_block((u8 *)edid, do_inferred_modes, 1285 &closure); 1286 1287 return closure.modes; 1288 } 1289 1290 int 1291 drm_est3_modes(struct drm_connector *connector, struct detailed_timing *timing) 1292 { 1293 int i, j, m, modes = 0; 1294 struct drm_display_mode *mode; 1295 u8 *est = ((u8 *)timing) + 5; 1296 1297 for (i = 0; i < 6; i++) { 1298 for (j = 7; j > 0; j--) { 1299 m = (i * 8) + (7 - j); 1300 if (m >= ARRAY_SIZE(est3_modes)) 1301 break; 1302 if (est[i] & (1 << j)) { 1303 mode = drm_mode_find_dmt(connector->dev, 1304 est3_modes[m].w, 1305 est3_modes[m].h, 1306 est3_modes[m].r, 1307 est3_modes[m].rb); 1308 if (mode) { 1309 drm_mode_probed_add(connector, mode); 1310 modes++; 1311 } 1312 } 1313 } 1314 } 1315 1316 return modes; 1317 } 1318 1319 void 1320 do_established_modes(struct detailed_timing *timing, void *c) 1321 { 1322 struct detailed_mode_closure *closure = c; 1323 struct detailed_non_pixel *data = &timing->data.other_data; 1324 1325 if (data->type == EDID_DETAIL_EST_TIMINGS) 1326 closure->modes += drm_est3_modes(closure->connector, timing); 1327 } 1328 1329 /** 1330 * add_established_modes - get est. modes from EDID and add them 1331 * @edid: EDID block to scan 1332 * 1333 * Each EDID block contains a bitmap of the supported "established modes" list 1334 * (defined above). Tease them out and add them to the global modes list. 1335 */ 1336 int 1337 add_established_modes(struct drm_connector *connector, struct edid *edid) 1338 { 1339 struct drm_device *dev = connector->dev; 1340 unsigned long est_bits = edid->established_timings.t1 | 1341 (edid->established_timings.t2 << 8) | 1342 ((edid->established_timings.mfg_rsvd & 0x80) << 9); 1343 int i, modes = 0; 1344 struct detailed_mode_closure closure = { 1345 connector, edid, 0, 0, 0 1346 }; 1347 1348 for (i = 0; i <= EDID_EST_TIMINGS; i++) { 1349 if (est_bits & (1<<i)) { 1350 struct drm_display_mode *newmode; 1351 newmode = drm_mode_duplicate(dev, &edid_est_modes[i]); 1352 if (newmode) { 1353 drm_mode_probed_add(connector, newmode); 1354 modes++; 1355 } 1356 } 1357 } 1358 1359 if (version_greater(edid, 1, 0)) 1360 drm_for_each_detailed_block((u8 *)edid, 1361 do_established_modes, &closure); 1362 1363 return modes + closure.modes; 1364 } 1365 1366 void 1367 do_standard_modes(struct detailed_timing *timing, void *c) 1368 { 1369 struct detailed_mode_closure *closure = c; 1370 struct detailed_non_pixel *data = &timing->data.other_data; 1371 struct drm_connector *connector = closure->connector; 1372 struct edid *edid = closure->edid; 1373 1374 if (data->type == EDID_DETAIL_STD_MODES) { 1375 int i; 1376 for (i = 0; i < 6; i++) { 1377 struct std_timing *std; 1378 struct drm_display_mode *newmode; 1379 1380 std = &data->data.timings[i]; 1381 newmode = drm_mode_std(connector, edid, std, 1382 edid->revision); 1383 if (newmode) { 1384 drm_mode_probed_add(connector, newmode); 1385 closure->modes++; 1386 } 1387 } 1388 } 1389 } 1390 1391 /** 1392 * add_standard_modes - get std. modes from EDID and add them 1393 * @edid: EDID block to scan 1394 * 1395 * Standard modes can be calculated using the appropriate standard (DMT, 1396 * GTF or CVT. Grab them from @edid and add them to the list. 1397 */ 1398 int 1399 add_standard_modes(struct drm_connector *connector, struct edid *edid) 1400 { 1401 int i, modes = 0; 1402 struct detailed_mode_closure closure = { 1403 connector, edid, 0, 0, 0 1404 }; 1405 1406 for (i = 0; i < EDID_STD_TIMINGS; i++) { 1407 struct drm_display_mode *newmode; 1408 1409 newmode = drm_mode_std(connector, edid, 1410 &edid->standard_timings[i], 1411 edid->revision); 1412 if (newmode) { 1413 drm_mode_probed_add(connector, newmode); 1414 modes++; 1415 } 1416 } 1417 1418 if (version_greater(edid, 1, 0)) 1419 drm_for_each_detailed_block((u8 *)edid, do_standard_modes, 1420 &closure); 1421 1422 /* XXX should also look for standard codes in VTB blocks */ 1423 1424 return modes + closure.modes; 1425 } 1426 1427 int 1428 drm_cvt_modes(struct drm_connector *connector, 1429 struct detailed_timing *timing) 1430 { 1431 int i, j, modes = 0; 1432 struct drm_display_mode *newmode; 1433 struct drm_device *dev = connector->dev; 1434 struct cvt_timing *cvt; 1435 const int rates[] = { 60, 85, 75, 60, 50 }; 1436 const u8 empty[3] = { 0, 0, 0 }; 1437 1438 for (i = 0; i < 4; i++) { 1439 int width, height; 1440 cvt = &(timing->data.other_data.data.cvt[i]); 1441 1442 if (!memcmp(cvt->code, empty, 3)) 1443 continue; 1444 1445 height = (cvt->code[0] + ((cvt->code[1] & 0xf0) << 4) + 1) * 2; 1446 switch (cvt->code[1] & 0x0c) { 1447 case 0x00: 1448 width = height * 4 / 3; 1449 break; 1450 case 0x04: 1451 width = height * 16 / 9; 1452 break; 1453 case 0x08: 1454 width = height * 16 / 10; 1455 break; 1456 case 0x0c: 1457 width = height * 15 / 9; 1458 break; 1459 } 1460 1461 for (j = 1; j < 5; j++) { 1462 if (cvt->code[2] & (1 << j)) { 1463 newmode = drm_cvt_mode(dev, width, height, 1464 rates[j], j == 0, 1465 false, false); 1466 if (newmode) { 1467 drm_mode_probed_add(connector, newmode); 1468 modes++; 1469 } 1470 } 1471 } 1472 } 1473 1474 return modes; 1475 } 1476 1477 void 1478 do_cvt_mode(struct detailed_timing *timing, void *c) 1479 { 1480 struct detailed_mode_closure *closure = c; 1481 struct detailed_non_pixel *data = &timing->data.other_data; 1482 1483 if (data->type == EDID_DETAIL_CVT_3BYTE) 1484 closure->modes += drm_cvt_modes(closure->connector, timing); 1485 } 1486 1487 int 1488 add_cvt_modes(struct drm_connector *connector, struct edid *edid) 1489 { 1490 struct detailed_mode_closure closure = { 1491 connector, edid, 0, 0, 0 1492 }; 1493 1494 if (version_greater(edid, 1, 2)) 1495 drm_for_each_detailed_block((u8 *)edid, do_cvt_mode, &closure); 1496 1497 /* XXX should also look for CVT codes in VTB blocks */ 1498 1499 return closure.modes; 1500 } 1501 1502 void 1503 do_detailed_mode(struct detailed_timing *timing, void *c) 1504 { 1505 struct detailed_mode_closure *closure = c; 1506 struct drm_display_mode *newmode; 1507 1508 if (timing->pixel_clock) { 1509 newmode = drm_mode_detailed(closure->connector->dev, 1510 closure->edid, timing, 1511 closure->quirks); 1512 if (!newmode) 1513 return; 1514 1515 if (closure->preferred) 1516 newmode->type |= DRM_MODE_TYPE_PREFERRED; 1517 1518 drm_mode_probed_add(closure->connector, newmode); 1519 closure->modes++; 1520 closure->preferred = 0; 1521 } 1522 } 1523 1524 /* 1525 * add_detailed_modes - Add modes from detailed timings 1526 * @connector: attached connector 1527 * @edid: EDID block to scan 1528 * @quirks: quirks to apply 1529 */ 1530 int 1531 add_detailed_modes(struct drm_connector *connector, struct edid *edid, 1532 u32 quirks) 1533 { 1534 struct detailed_mode_closure closure = { 1535 connector, 1536 edid, 1537 1, 1538 quirks, 1539 0 1540 }; 1541 1542 if (closure.preferred && !version_greater(edid, 1, 3)) 1543 closure.preferred = 1544 (edid->features & DRM_EDID_FEATURE_PREFERRED_TIMING); 1545 1546 drm_for_each_detailed_block((u8 *)edid, do_detailed_mode, &closure); 1547 1548 return closure.modes; 1549 } 1550 1551 #define HDMI_IDENTIFIER 0x000C03 1552 #define AUDIO_BLOCK 0x01 1553 #define VIDEO_BLOCK 0x02 1554 #define VENDOR_BLOCK 0x03 1555 #define SPEAKER_BLOCK 0x04 1556 #define EDID_BASIC_AUDIO (1 << 6) 1557 #define EDID_CEA_YCRCB444 (1 << 5) 1558 #define EDID_CEA_YCRCB422 (1 << 4) 1559 1560 /** 1561 * Search EDID for CEA extension block. 1562 */ 1563 u8 * 1564 drm_find_cea_extension(struct edid *edid) 1565 { 1566 u8 *edid_ext = NULL; 1567 int i; 1568 1569 /* No EDID or EDID extensions */ 1570 if (edid == NULL || edid->extensions == 0) 1571 return NULL; 1572 1573 /* Find CEA extension */ 1574 for (i = 0; i < edid->extensions; i++) { 1575 edid_ext = (u8 *)edid + EDID_LENGTH * (i + 1); 1576 if (edid_ext[0] == CEA_EXT) 1577 break; 1578 } 1579 1580 if (i == edid->extensions) 1581 return NULL; 1582 1583 return edid_ext; 1584 } 1585 EXPORT_SYMBOL(drm_find_cea_extension); 1586 1587 /* 1588 * Looks for a CEA mode matching given drm_display_mode. 1589 * Returns its CEA Video ID code, or 0 if not found. 1590 */ 1591 u8 1592 drm_match_cea_mode(struct drm_display_mode *to_match) 1593 { 1594 struct drm_display_mode *cea_mode; 1595 u8 mode; 1596 1597 for (mode = 0; mode < drm_num_cea_modes; mode++) { 1598 cea_mode = (struct drm_display_mode *)&edid_cea_modes[mode]; 1599 1600 if (drm_mode_equal(to_match, cea_mode)) 1601 return mode + 1; 1602 } 1603 return 0; 1604 } 1605 EXPORT_SYMBOL(drm_match_cea_mode); 1606 1607 1608 int 1609 do_cea_modes (struct drm_connector *connector, u8 *db, u8 len) 1610 { 1611 struct drm_device *dev = connector->dev; 1612 u8 * mode, cea_mode; 1613 int modes = 0; 1614 1615 for (mode = db; mode < db + len; mode++) { 1616 cea_mode = (*mode & 127) - 1; /* CEA modes are numbered 1..127 */ 1617 if (cea_mode < drm_num_cea_modes) { 1618 struct drm_display_mode *newmode; 1619 newmode = drm_mode_duplicate(dev, 1620 &edid_cea_modes[cea_mode]); 1621 if (newmode) { 1622 drm_mode_probed_add(connector, newmode); 1623 modes++; 1624 } 1625 } 1626 } 1627 1628 return modes; 1629 } 1630 1631 int 1632 cea_db_payload_len(const u8 *db) 1633 { 1634 return db[0] & 0x1f; 1635 } 1636 1637 int 1638 cea_db_tag(const u8 *db) 1639 { 1640 return db[0] >> 5; 1641 } 1642 1643 int 1644 cea_revision(const u8 *cea) 1645 { 1646 return cea[1]; 1647 } 1648 1649 int 1650 cea_db_offsets(const u8 *cea, int *start, int *end) 1651 { 1652 /* Data block offset in CEA extension block */ 1653 *start = 4; 1654 *end = cea[2]; 1655 if (*end == 0) 1656 *end = 127; 1657 if (*end < 4 || *end > 127) 1658 return -ERANGE; 1659 return 0; 1660 } 1661 1662 #define for_each_cea_db(cea, i, start, end) \ 1663 for ((i) = (start); (i) < (end) && (i) + cea_db_payload_len(&(cea)[(i)]) < (end); (i) += cea_db_payload_len(&(cea)[(i)]) + 1) 1664 1665 int 1666 add_cea_modes(struct drm_connector *connector, struct edid *edid) 1667 { 1668 u8 * cea = drm_find_cea_extension(edid); 1669 u8 * db, dbl; 1670 int modes = 0; 1671 1672 if (cea && cea_revision(cea) >= 3) { 1673 int i, start, end; 1674 1675 if (cea_db_offsets(cea, &start, &end)) 1676 return 0; 1677 1678 for_each_cea_db(cea, i, start, end) { 1679 db = &cea[i]; 1680 dbl = cea_db_payload_len(db); 1681 1682 if (cea_db_tag(db) == VIDEO_BLOCK) 1683 modes += do_cea_modes (connector, db+1, dbl); 1684 } 1685 } 1686 1687 return modes; 1688 } 1689 1690 void 1691 parse_hdmi_vsdb(struct drm_connector *connector, const u8 *db) 1692 { 1693 u8 len = cea_db_payload_len(db); 1694 1695 if (len >= 6) { 1696 connector->eld[5] |= (db[6] >> 7) << 1; /* Supports_AI */ 1697 connector->dvi_dual = db[6] & 1; 1698 } 1699 if (len >= 7) 1700 connector->max_tmds_clock = db[7] * 5; 1701 if (len >= 8) { 1702 connector->latency_present[0] = db[8] >> 7; 1703 connector->latency_present[1] = (db[8] >> 6) & 1; 1704 } 1705 if (len >= 9) 1706 connector->video_latency[0] = db[9]; 1707 if (len >= 10) 1708 connector->audio_latency[0] = db[10]; 1709 if (len >= 11) 1710 connector->video_latency[1] = db[11]; 1711 if (len >= 12) 1712 connector->audio_latency[1] = db[12]; 1713 1714 DRM_DEBUG_KMS("HDMI: DVI dual %d, " 1715 "max TMDS clock %d, " 1716 "latency present %d %d, " 1717 "video latency %d %d, " 1718 "audio latency %d %d\n", 1719 connector->dvi_dual, 1720 connector->max_tmds_clock, 1721 (int) connector->latency_present[0], 1722 (int) connector->latency_present[1], 1723 connector->video_latency[0], 1724 connector->video_latency[1], 1725 connector->audio_latency[0], 1726 connector->audio_latency[1]); 1727 } 1728 1729 void 1730 monitor_name(struct detailed_timing *t, void *data) 1731 { 1732 if (t->data.other_data.type == EDID_DETAIL_MONITOR_NAME) 1733 *(u8 **)data = t->data.other_data.data.str.str; 1734 } 1735 1736 bool 1737 cea_db_is_hdmi_vsdb(const u8 *db) 1738 { 1739 int hdmi_id; 1740 1741 if (cea_db_tag(db) != VENDOR_BLOCK) 1742 return false; 1743 1744 if (cea_db_payload_len(db) < 5) 1745 return false; 1746 1747 hdmi_id = db[1] | (db[2] << 8) | (db[3] << 16); 1748 1749 return hdmi_id == HDMI_IDENTIFIER; 1750 } 1751 1752 /** 1753 * drm_edid_to_eld - build ELD from EDID 1754 * @connector: connector corresponding to the HDMI/DP sink 1755 * @edid: EDID to parse 1756 * 1757 * Fill the ELD (EDID-Like Data) buffer for passing to the audio driver. 1758 * Some ELD fields are left to the graphics driver caller: 1759 * - Conn_Type 1760 * - HDCP 1761 * - Port_ID 1762 */ 1763 void 1764 drm_edid_to_eld(struct drm_connector *connector, struct edid *edid) 1765 { 1766 uint8_t *eld = connector->eld; 1767 u8 *cea; 1768 u8 *name; 1769 u8 *db; 1770 int sad_count = 0; 1771 int mnl; 1772 int dbl; 1773 1774 memset(eld, 0, sizeof(connector->eld)); 1775 1776 cea = drm_find_cea_extension(edid); 1777 if (!cea) { 1778 DRM_DEBUG_KMS("ELD: no CEA Extension found\n"); 1779 return; 1780 } 1781 1782 name = NULL; 1783 drm_for_each_detailed_block((u8 *)edid, monitor_name, &name); 1784 for (mnl = 0; name && mnl < 13; mnl++) { 1785 if (name[mnl] == 0x0a) 1786 break; 1787 eld[20 + mnl] = name[mnl]; 1788 } 1789 eld[4] = (cea[1] << 5) | mnl; 1790 DRM_DEBUG_KMS("ELD monitor %s\n", eld + 20); 1791 1792 eld[0] = 2 << 3; /* ELD version: 2 */ 1793 1794 eld[16] = edid->mfg_id[0]; 1795 eld[17] = edid->mfg_id[1]; 1796 eld[18] = edid->prod_code[0]; 1797 eld[19] = edid->prod_code[1]; 1798 1799 if (cea_revision(cea) >= 3) { 1800 int i, start, end; 1801 1802 if (cea_db_offsets(cea, &start, &end)) { 1803 start = 0; 1804 end = 0; 1805 } 1806 1807 for_each_cea_db(cea, i, start, end) { 1808 db = &cea[i]; 1809 dbl = cea_db_payload_len(db); 1810 1811 switch (cea_db_tag(db)) { 1812 case AUDIO_BLOCK: 1813 /* Audio Data Block, contains SADs */ 1814 sad_count = dbl / 3; 1815 if (dbl >= 1) 1816 memcpy(eld + 20 + mnl, &db[1], dbl); 1817 break; 1818 case SPEAKER_BLOCK: 1819 /* Speaker Allocation Data Block */ 1820 if (dbl >= 1) 1821 eld[7] = db[1]; 1822 break; 1823 case VENDOR_BLOCK: 1824 /* HDMI Vendor-Specific Data Block */ 1825 if (cea_db_is_hdmi_vsdb(db)) 1826 parse_hdmi_vsdb(connector, db); 1827 break; 1828 default: 1829 break; 1830 } 1831 } 1832 } 1833 eld[5] |= sad_count << 4; 1834 eld[2] = (20 + mnl + sad_count * 3 + 3) / 4; 1835 1836 DRM_DEBUG_KMS("ELD size %d, SAD count %d\n", (int)eld[2], sad_count); 1837 } 1838 EXPORT_SYMBOL(drm_edid_to_eld); 1839 1840 /** 1841 * drm_av_sync_delay - HDMI/DP sink audio-video sync delay in millisecond 1842 * @connector: connector associated with the HDMI/DP sink 1843 * @mode: the display mode 1844 */ 1845 int 1846 drm_av_sync_delay(struct drm_connector *connector, 1847 struct drm_display_mode *mode) 1848 { 1849 int i = !!(mode->flags & DRM_MODE_FLAG_INTERLACE); 1850 int a, v; 1851 1852 if (!connector->latency_present[0]) 1853 return 0; 1854 if (!connector->latency_present[1]) 1855 i = 0; 1856 1857 a = connector->audio_latency[i]; 1858 v = connector->video_latency[i]; 1859 1860 /* 1861 * HDMI/DP sink doesn't support audio or video? 1862 */ 1863 if (a == 255 || v == 255) 1864 return 0; 1865 1866 /* 1867 * Convert raw EDID values to millisecond. 1868 * Treat unknown latency as 0ms. 1869 */ 1870 if (a) 1871 a = min(2 * (a - 1), 500); 1872 if (v) 1873 v = min(2 * (v - 1), 500); 1874 1875 return max(v - a, 0); 1876 } 1877 EXPORT_SYMBOL(drm_av_sync_delay); 1878 1879 /** 1880 * drm_select_eld - select one ELD from multiple HDMI/DP sinks 1881 * @encoder: the encoder just changed display mode 1882 * @mode: the adjusted display mode 1883 * 1884 * It's possible for one encoder to be associated with multiple HDMI/DP sinks. 1885 * The policy is now hard coded to simply use the first HDMI/DP sink's ELD. 1886 */ 1887 struct drm_connector * 1888 drm_select_eld(struct drm_encoder *encoder, 1889 struct drm_display_mode *mode) 1890 { 1891 struct drm_connector *connector; 1892 struct drm_device *dev = encoder->dev; 1893 1894 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 1895 if (connector->encoder == encoder && connector->eld[0]) 1896 return connector; 1897 1898 return NULL; 1899 } 1900 EXPORT_SYMBOL(drm_select_eld); 1901 1902 /** 1903 * drm_detect_hdmi_monitor - detect whether monitor is hdmi. 1904 * @edid: monitor EDID information 1905 * 1906 * Parse the CEA extension according to CEA-861-B. 1907 * Return true if HDMI, false if not or unknown. 1908 */ 1909 bool 1910 drm_detect_hdmi_monitor(struct edid *edid) 1911 { 1912 u8 *edid_ext; 1913 int i; 1914 int start_offset, end_offset; 1915 1916 edid_ext = drm_find_cea_extension(edid); 1917 if (!edid_ext) 1918 return false; 1919 1920 if (cea_db_offsets(edid_ext, &start_offset, &end_offset)) 1921 return false; 1922 1923 /* 1924 * Because HDMI identifier is in Vendor Specific Block, 1925 * search it from all data blocks of CEA extension. 1926 */ 1927 for_each_cea_db(edid_ext, i, start_offset, end_offset) { 1928 if (cea_db_is_hdmi_vsdb(&edid_ext[i])) 1929 return true; 1930 } 1931 1932 return false; 1933 } 1934 EXPORT_SYMBOL(drm_detect_hdmi_monitor); 1935 1936 /** 1937 * drm_detect_monitor_audio - check monitor audio capability 1938 * 1939 * Monitor should have CEA extension block. 1940 * If monitor has 'basic audio', but no CEA audio blocks, it's 'basic 1941 * audio' only. If there is any audio extension block and supported 1942 * audio format, assume at least 'basic audio' support, even if 'basic 1943 * audio' is not defined in EDID. 1944 * 1945 */ 1946 bool 1947 drm_detect_monitor_audio(struct edid *edid) 1948 { 1949 u8 *edid_ext; 1950 int i, j; 1951 bool has_audio = false; 1952 int start_offset, end_offset; 1953 1954 edid_ext = drm_find_cea_extension(edid); 1955 if (!edid_ext) 1956 goto end; 1957 1958 has_audio = ((edid_ext[3] & EDID_BASIC_AUDIO) != 0); 1959 1960 if (has_audio) { 1961 DRM_DEBUG_KMS("Monitor has basic audio support\n"); 1962 goto end; 1963 } 1964 1965 if (cea_db_offsets(edid_ext, &start_offset, &end_offset)) 1966 goto end; 1967 1968 for_each_cea_db(edid_ext, i, start_offset, end_offset) { 1969 if (cea_db_tag(&edid_ext[i]) == AUDIO_BLOCK) { 1970 has_audio = true; 1971 for (j = 1; j < cea_db_payload_len(&edid_ext[i]) + 1; j += 3) 1972 DRM_DEBUG_KMS("CEA audio format %d\n", 1973 (edid_ext[i + j] >> 3) & 0xf); 1974 goto end; 1975 } 1976 } 1977 end: 1978 return has_audio; 1979 } 1980 EXPORT_SYMBOL(drm_detect_monitor_audio); 1981 1982 /** 1983 * drm_add_display_info - pull display info out if present 1984 * @edid: EDID data 1985 * @info: display info (attached to connector) 1986 * 1987 * Grab any available display info and stuff it into the drm_display_info 1988 * structure that's part of the connector. Useful for tracking bpp and 1989 * color spaces. 1990 */ 1991 void 1992 drm_add_display_info(struct edid *edid, 1993 struct drm_display_info *info) 1994 { 1995 u8 *edid_ext; 1996 1997 info->width_mm = edid->width_cm * 10; 1998 info->height_mm = edid->height_cm * 10; 1999 2000 /* driver figures it out in this case */ 2001 info->bpc = 0; 2002 info->color_formats = 0; 2003 2004 if (edid->revision < 3) 2005 return; 2006 2007 if (!(edid->input & DRM_EDID_INPUT_DIGITAL)) 2008 return; 2009 2010 /* Get data from CEA blocks if present */ 2011 edid_ext = drm_find_cea_extension(edid); 2012 if (edid_ext) { 2013 info->cea_rev = edid_ext[1]; 2014 2015 /* The existence of a CEA block should imply RGB support */ 2016 info->color_formats = DRM_COLOR_FORMAT_RGB444; 2017 if (edid_ext[3] & EDID_CEA_YCRCB444) 2018 info->color_formats |= DRM_COLOR_FORMAT_YCRCB444; 2019 if (edid_ext[3] & EDID_CEA_YCRCB422) 2020 info->color_formats |= DRM_COLOR_FORMAT_YCRCB422; 2021 } 2022 2023 /* Only defined for 1.4 with digital displays */ 2024 if (edid->revision < 4) 2025 return; 2026 2027 switch (edid->input & DRM_EDID_DIGITAL_DEPTH_MASK) { 2028 case DRM_EDID_DIGITAL_DEPTH_6: 2029 info->bpc = 6; 2030 break; 2031 case DRM_EDID_DIGITAL_DEPTH_8: 2032 info->bpc = 8; 2033 break; 2034 case DRM_EDID_DIGITAL_DEPTH_10: 2035 info->bpc = 10; 2036 break; 2037 case DRM_EDID_DIGITAL_DEPTH_12: 2038 info->bpc = 12; 2039 break; 2040 case DRM_EDID_DIGITAL_DEPTH_14: 2041 info->bpc = 14; 2042 break; 2043 case DRM_EDID_DIGITAL_DEPTH_16: 2044 info->bpc = 16; 2045 break; 2046 case DRM_EDID_DIGITAL_DEPTH_UNDEF: 2047 default: 2048 info->bpc = 0; 2049 break; 2050 } 2051 2052 info->color_formats |= DRM_COLOR_FORMAT_RGB444; 2053 if (edid->features & DRM_EDID_FEATURE_RGB_YCRCB444) 2054 info->color_formats |= DRM_COLOR_FORMAT_YCRCB444; 2055 if (edid->features & DRM_EDID_FEATURE_RGB_YCRCB422) 2056 info->color_formats |= DRM_COLOR_FORMAT_YCRCB422; 2057 } 2058 2059 /** 2060 * drm_add_edid_modes - add modes from EDID data, if available 2061 * @connector: connector we're probing 2062 * @edid: edid data 2063 * 2064 * Add the specified modes to the connector's mode list. 2065 * 2066 * Return number of modes added or 0 if we couldn't find any. 2067 */ 2068 int 2069 drm_add_edid_modes(struct drm_connector *connector, struct edid *edid) 2070 { 2071 int num_modes = 0; 2072 u32 quirks; 2073 2074 if (edid == NULL) { 2075 return 0; 2076 } 2077 if (!drm_edid_is_valid(edid)) { 2078 printf("%s: EDID invalid.\n", 2079 drm_get_connector_name(connector)); 2080 return 0; 2081 } 2082 2083 quirks = edid_get_quirks(edid); 2084 2085 /* 2086 * EDID spec says modes should be preferred in this order: 2087 * - preferred detailed mode 2088 * - other detailed modes from base block 2089 * - detailed modes from extension blocks 2090 * - CVT 3-byte code modes 2091 * - standard timing codes 2092 * - established timing codes 2093 * - modes inferred from GTF or CVT range information 2094 * 2095 * We get this pretty much right. 2096 * 2097 * XXX order for additional mode types in extension blocks? 2098 */ 2099 num_modes += add_detailed_modes(connector, edid, quirks); 2100 num_modes += add_cvt_modes(connector, edid); 2101 num_modes += add_standard_modes(connector, edid); 2102 num_modes += add_established_modes(connector, edid); 2103 if (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF) 2104 num_modes += add_inferred_modes(connector, edid); 2105 num_modes += add_cea_modes(connector, edid); 2106 2107 if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75)) 2108 edid_fixup_preferred(connector, quirks); 2109 2110 drm_add_display_info(edid, &connector->display_info); 2111 2112 return num_modes; 2113 } 2114 EXPORT_SYMBOL(drm_add_edid_modes); 2115 2116 /** 2117 * drm_add_modes_noedid - add modes for the connectors without EDID 2118 * @connector: connector we're probing 2119 * @hdisplay: the horizontal display limit 2120 * @vdisplay: the vertical display limit 2121 * 2122 * Add the specified modes to the connector's mode list. Only when the 2123 * hdisplay/vdisplay is not beyond the given limit, it will be added. 2124 * 2125 * Return number of modes added or 0 if we couldn't find any. 2126 */ 2127 int 2128 drm_add_modes_noedid(struct drm_connector *connector, 2129 int hdisplay, int vdisplay) 2130 { 2131 int i, count, num_modes = 0; 2132 struct drm_display_mode *mode; 2133 struct drm_device *dev = connector->dev; 2134 2135 count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode); 2136 if (hdisplay < 0) 2137 hdisplay = 0; 2138 if (vdisplay < 0) 2139 vdisplay = 0; 2140 2141 for (i = 0; i < count; i++) { 2142 const struct drm_display_mode *ptr = &drm_dmt_modes[i]; 2143 if (hdisplay && vdisplay) { 2144 /* 2145 * Only when two are valid, they will be used to check 2146 * whether the mode should be added to the mode list of 2147 * the connector. 2148 */ 2149 if (ptr->hdisplay > hdisplay || 2150 ptr->vdisplay > vdisplay) 2151 continue; 2152 } 2153 if (drm_mode_vrefresh(ptr) > 61) 2154 continue; 2155 mode = drm_mode_duplicate(dev, ptr); 2156 if (mode) { 2157 drm_mode_probed_add(connector, mode); 2158 num_modes++; 2159 } 2160 } 2161 return num_modes; 2162 } 2163 EXPORT_SYMBOL(drm_add_modes_noedid); 2164 2165 /** 2166 * drm_mode_cea_vic - return the CEA-861 VIC of a given mode 2167 * @mode: mode 2168 * 2169 * RETURNS: 2170 * The VIC number, 0 in case it's not a CEA-861 mode. 2171 */ 2172 uint8_t 2173 drm_mode_cea_vic(const struct drm_display_mode *mode) 2174 { 2175 uint8_t i; 2176 2177 for (i = 0; i < drm_num_cea_modes; i++) 2178 if (drm_mode_equal(mode, &edid_cea_modes[i])) 2179 return i + 1; 2180 2181 return 0; 2182 } 2183 EXPORT_SYMBOL(drm_mode_cea_vic); 2184