1 /* $NetBSD: edid.c,v 1.12 2013/02/08 16:35:10 skrll Exp $ */ 2 3 /*- 4 * Copyright (c) 2006 Itronix Inc. 5 * All rights reserved. 6 * 7 * Written by Garrett D'Amore for Itronix Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. The name of Itronix Inc. may not be used to endorse 18 * or promote products derived from this software without specific 19 * prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND ANY EXPRESS 22 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 23 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY 25 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 27 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 31 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/kernel.h> 37 #include <sys/malloc.h> 38 #include <sys/libkern.h> 39 #include <dev/videomode/videomode.h> 40 #include <dev/videomode/ediddevs.h> 41 #include <dev/videomode/edidreg.h> 42 #include <dev/videomode/edidvar.h> 43 #include <dev/videomode/vesagtf.h> 44 45 #define EDIDVERBOSE 1 46 #define DIVIDE(x,y) (((x) + ((y) / 2)) / (y)) 47 48 /* These are reversed established timing order */ 49 static const char *_edid_modes[] = { 50 "1280x1024x75", 51 "1024x768x75", 52 "1024x768x70", 53 "1024x768x60", 54 "1024x768x87i", 55 "832x624x74", /* rounding error, 74.55 Hz aka "832x624x75" */ 56 "800x600x75", 57 "800x600x72", 58 "800x600x60", 59 "800x600x56", 60 "640x480x75", 61 "640x480x72", 62 "640x480x67", 63 "640x480x60", 64 "720x400x87", /* rounding error, 87.85 Hz aka "720x400x88" */ 65 "720x400x70", 66 }; 67 68 #ifdef EDIDVERBOSE 69 struct edid_vendor { 70 const char *vendor; 71 const char *name; 72 }; 73 74 struct edid_product { 75 const char *vendor; 76 uint16_t product; 77 const char *name; 78 }; 79 80 #include <dev/videomode/ediddevs_data.h> 81 #endif /* EDIDVERBOSE */ 82 83 static const char * 84 edid_findvendor(const char *vendor) 85 { 86 #ifdef EDIDVERBOSE 87 int n; 88 89 for (n = 0; n < edid_nvendors; n++) 90 if (memcmp(edid_vendors[n].vendor, vendor, 3) == 0) 91 return edid_vendors[n].name; 92 #endif 93 return NULL; 94 } 95 96 static const char * 97 edid_findproduct(const char *vendor, uint16_t product) 98 { 99 #ifdef EDIDVERBOSE 100 int n; 101 102 for (n = 0; n < edid_nproducts; n++) 103 if (edid_products[n].product == product && 104 memcmp(edid_products[n].vendor, vendor, 3) == 0) 105 return edid_products[n].name; 106 #endif /* EDIDVERBOSE */ 107 return NULL; 108 109 } 110 111 static void 112 edid_strchomp(char *ptr) 113 { 114 for (;;) { 115 switch (*ptr) { 116 case '\0': 117 return; 118 case '\r': 119 case '\n': 120 *ptr = '\0'; 121 return; 122 } 123 ptr++; 124 } 125 } 126 127 int 128 edid_is_valid(uint8_t *d) 129 { 130 int sum = 0, i; 131 uint8_t sig[8] = EDID_SIGNATURE; 132 133 if (memcmp(d, sig, 8) != 0) 134 return EINVAL; 135 136 for (i = 0; i < 128; i++) 137 sum += d[i]; 138 if ((sum & 0xff) != 0) 139 return EINVAL; 140 141 return 0; 142 } 143 144 void 145 edid_print(struct edid_info *edid) 146 { 147 int i; 148 149 if (edid == NULL) 150 return; 151 printf("Vendor: [%s] %s\n", edid->edid_vendor, edid->edid_vendorname); 152 printf("Product: [%04X] %s\n", edid->edid_product, 153 edid->edid_productname); 154 printf("Serial number: %s\n", edid->edid_serial); 155 printf("Manufactured %d Week %d\n", 156 edid->edid_year, edid->edid_week); 157 printf("EDID Version %d.%d\n", edid->edid_version, 158 edid->edid_revision); 159 printf("EDID Comment: %s\n", edid->edid_comment); 160 161 printf("Video Input: %x\n", edid->edid_video_input); 162 if (edid->edid_video_input & EDID_VIDEO_INPUT_DIGITAL) { 163 printf("\tDigital"); 164 if (edid->edid_video_input & EDID_VIDEO_INPUT_DFP1_COMPAT) 165 printf(" (DFP 1.x compatible)"); 166 printf("\n"); 167 } else { 168 printf("\tAnalog\n"); 169 switch (EDID_VIDEO_INPUT_LEVEL(edid->edid_video_input)) { 170 case 0: 171 printf("\t-0.7, 0.3V\n"); 172 break; 173 case 1: 174 printf("\t-0.714, 0.286V\n"); 175 break; 176 case 2: 177 printf("\t-1.0, 0.4V\n"); 178 break; 179 case 3: 180 printf("\t-0.7, 0.0V\n"); 181 break; 182 } 183 if (edid->edid_video_input & EDID_VIDEO_INPUT_BLANK_TO_BLACK) 184 printf("\tBlank-to-black setup\n"); 185 if (edid->edid_video_input & EDID_VIDEO_INPUT_SEPARATE_SYNCS) 186 printf("\tSeparate syncs\n"); 187 if (edid->edid_video_input & EDID_VIDEO_INPUT_COMPOSITE_SYNC) 188 printf("\tComposite sync\n"); 189 if (edid->edid_video_input & EDID_VIDEO_INPUT_SYNC_ON_GRN) 190 printf("\tSync on green\n"); 191 if (edid->edid_video_input & EDID_VIDEO_INPUT_SERRATION) 192 printf("\tSerration vsync\n"); 193 } 194 195 printf("Gamma: %d.%02d\n", 196 edid->edid_gamma / 100, edid->edid_gamma % 100); 197 198 printf("Max Size: %d cm x %d cm\n", 199 edid->edid_max_hsize, edid->edid_max_vsize); 200 201 printf("Features: %x\n", edid->edid_features); 202 if (edid->edid_features & EDID_FEATURES_STANDBY) 203 printf("\tDPMS standby\n"); 204 if (edid->edid_features & EDID_FEATURES_SUSPEND) 205 printf("\tDPMS suspend\n"); 206 if (edid->edid_features & EDID_FEATURES_ACTIVE_OFF) 207 printf("\tDPMS active-off\n"); 208 switch (EDID_FEATURES_DISP_TYPE(edid->edid_features)) { 209 case EDID_FEATURES_DISP_TYPE_MONO: 210 printf("\tMonochrome\n"); 211 break; 212 case EDID_FEATURES_DISP_TYPE_RGB: 213 printf("\tRGB\n"); 214 break; 215 case EDID_FEATURES_DISP_TYPE_NON_RGB: 216 printf("\tMulticolor\n"); 217 break; 218 case EDID_FEATURES_DISP_TYPE_UNDEFINED: 219 printf("\tUndefined monitor type\n"); 220 break; 221 } 222 if (edid->edid_features & EDID_FEATURES_STD_COLOR) 223 printf("\tStandard color space\n"); 224 if (edid->edid_features & EDID_FEATURES_PREFERRED_TIMING) 225 printf("\tPreferred timing\n"); 226 if (edid->edid_features & EDID_FEATURES_DEFAULT_GTF) 227 printf("\tDefault GTF supported\n"); 228 229 printf("Chroma Info:\n"); 230 printf("\tRed X: 0.%03d\n", edid->edid_chroma.ec_redx); 231 printf("\tRed Y: 0.%03d\n", edid->edid_chroma.ec_redy); 232 printf("\tGrn X: 0.%03d\n", edid->edid_chroma.ec_greenx); 233 printf("\tGrn Y: 0.%03d\n", edid->edid_chroma.ec_greeny); 234 printf("\tBlu X: 0.%03d\n", edid->edid_chroma.ec_bluex); 235 printf("\tBlu Y: 0.%03d\n", edid->edid_chroma.ec_bluey); 236 printf("\tWht X: 0.%03d\n", edid->edid_chroma.ec_whitex); 237 printf("\tWht Y: 0.%03d\n", edid->edid_chroma.ec_whitey); 238 239 if (edid->edid_have_range) { 240 printf("Range:\n"); 241 printf("\tHorizontal: %d - %d kHz\n", 242 edid->edid_range.er_min_hfreq, 243 edid->edid_range.er_max_hfreq); 244 printf("\tVertical: %d - %d Hz\n", 245 edid->edid_range.er_min_vfreq, 246 edid->edid_range.er_max_vfreq); 247 printf("\tMax Dot Clock: %d MHz\n", 248 edid->edid_range.er_max_clock); 249 if (edid->edid_range.er_have_gtf2) { 250 printf("\tGTF2 hfreq: %d\n", 251 edid->edid_range.er_gtf2_hfreq); 252 printf("\tGTF2 C: %d\n", edid->edid_range.er_gtf2_c); 253 printf("\tGTF2 M: %d\n", edid->edid_range.er_gtf2_m); 254 printf("\tGTF2 J: %d\n", edid->edid_range.er_gtf2_j); 255 printf("\tGTF2 K: %d\n", edid->edid_range.er_gtf2_k); 256 } 257 } 258 printf("Video modes:\n"); 259 for (i = 0; i < edid->edid_nmodes; i++) { 260 printf("\t%dx%d @ %dHz", 261 edid->edid_modes[i].hdisplay, 262 edid->edid_modes[i].vdisplay, 263 DIVIDE(DIVIDE(edid->edid_modes[i].dot_clock * 1000, 264 edid->edid_modes[i].htotal), edid->edid_modes[i].vtotal)); 265 printf(" (%d %d %d %d %d %d %d", 266 edid->edid_modes[i].dot_clock, 267 edid->edid_modes[i].hsync_start, 268 edid->edid_modes[i].hsync_end, 269 edid->edid_modes[i].htotal, 270 edid->edid_modes[i].vsync_start, 271 edid->edid_modes[i].vsync_end, 272 edid->edid_modes[i].vtotal); 273 printf(" %s%sH %s%sV)\n", 274 edid->edid_modes[i].flags & VID_PHSYNC ? "+" : "", 275 edid->edid_modes[i].flags & VID_NHSYNC ? "-" : "", 276 edid->edid_modes[i].flags & VID_PVSYNC ? "+" : "", 277 edid->edid_modes[i].flags & VID_NVSYNC ? "-" : ""); 278 } 279 if (edid->edid_preferred_mode) 280 printf("Preferred mode: %dx%d @ %dHz\n", 281 edid->edid_preferred_mode->hdisplay, 282 edid->edid_preferred_mode->vdisplay, 283 DIVIDE(DIVIDE(edid->edid_preferred_mode->dot_clock * 1000, 284 edid->edid_preferred_mode->htotal), 285 edid->edid_preferred_mode->vtotal)); 286 287 printf("Number of extension blocks: %d\n", edid->edid_ext_block_count); 288 } 289 290 static const struct videomode * 291 edid_mode_lookup_list(const char *name) 292 { 293 int i; 294 295 for (i = 0; i < videomode_count; i++) 296 if (strcmp(name, videomode_list[i].name) == 0) 297 return &videomode_list[i]; 298 return NULL; 299 } 300 301 static struct videomode * 302 edid_search_mode(struct edid_info *edid, const struct videomode *mode) 303 { 304 int refresh, i; 305 306 refresh = DIVIDE(DIVIDE(mode->dot_clock * 1000, 307 mode->htotal), mode->vtotal); 308 for (i = 0; i < edid->edid_nmodes; i++) { 309 if (mode->hdisplay == edid->edid_modes[i].hdisplay && 310 mode->vdisplay == edid->edid_modes[i].vdisplay && 311 refresh == DIVIDE(DIVIDE( 312 edid->edid_modes[i].dot_clock * 1000, 313 edid->edid_modes[i].htotal), edid->edid_modes[i].vtotal)) { 314 return &edid->edid_modes[i]; 315 } 316 } 317 return NULL; 318 } 319 320 static int 321 edid_std_timing(uint8_t *data, struct videomode *vmp) 322 { 323 unsigned x, y, f; 324 const struct videomode *lookup; 325 char name[80]; 326 327 if ((data[0] == 1 && data[1] == 1) || 328 (data[0] == 0 && data[1] == 0) || 329 (data[0] == 0x20 && data[1] == 0x20)) 330 return 0; 331 332 x = EDID_STD_TIMING_HRES(data); 333 switch (EDID_STD_TIMING_RATIO(data)) { 334 case EDID_STD_TIMING_RATIO_16_10: 335 y = x * 10 / 16; 336 break; 337 case EDID_STD_TIMING_RATIO_4_3: 338 y = x * 3 / 4; 339 break; 340 case EDID_STD_TIMING_RATIO_5_4: 341 y = x * 4 / 5; 342 break; 343 case EDID_STD_TIMING_RATIO_16_9: 344 default: 345 y = x * 9 / 16; 346 break; 347 } 348 f = EDID_STD_TIMING_VFREQ(data); 349 350 /* first try to lookup the mode as a DMT timing */ 351 snprintf(name, sizeof(name), "%dx%dx%d", x, y, f); 352 if ((lookup = edid_mode_lookup_list(name)) != NULL) { 353 *vmp = *lookup; 354 } else { 355 /* failing that, calculate it using gtf */ 356 /* 357 * Hmm. I'm not using alternate GTF timings, which 358 * could, in theory, be present. 359 */ 360 vesagtf_mode(x, y, f, vmp); 361 } 362 return 1; 363 } 364 365 static int 366 edid_det_timing(uint8_t *data, struct videomode *vmp) 367 { 368 unsigned hactive, hblank, hsyncwid, hsyncoff; 369 unsigned vactive, vblank, vsyncwid, vsyncoff; 370 uint8_t flags; 371 372 flags = EDID_DET_TIMING_FLAGS(data); 373 374 /* we don't support stereo modes (for now) */ 375 if (flags & (EDID_DET_TIMING_FLAG_STEREO | 376 EDID_DET_TIMING_FLAG_STEREO_MODE)) 377 return 0; 378 379 vmp->dot_clock = EDID_DET_TIMING_DOT_CLOCK(data) / 1000; 380 381 hactive = EDID_DET_TIMING_HACTIVE(data); 382 hblank = EDID_DET_TIMING_HBLANK(data); 383 hsyncwid = EDID_DET_TIMING_HSYNC_WIDTH(data); 384 hsyncoff = EDID_DET_TIMING_HSYNC_OFFSET(data); 385 386 vactive = EDID_DET_TIMING_VACTIVE(data); 387 vblank = EDID_DET_TIMING_VBLANK(data); 388 vsyncwid = EDID_DET_TIMING_VSYNC_WIDTH(data); 389 vsyncoff = EDID_DET_TIMING_VSYNC_OFFSET(data); 390 391 /* Borders are contained within the blank areas. */ 392 393 vmp->hdisplay = hactive; 394 vmp->htotal = hactive + hblank; 395 vmp->hsync_start = hactive + hsyncoff; 396 vmp->hsync_end = vmp->hsync_start + hsyncwid; 397 398 vmp->vdisplay = vactive; 399 vmp->vtotal = vactive + vblank; 400 vmp->vsync_start = vactive + vsyncoff; 401 vmp->vsync_end = vmp->vsync_start + vsyncwid; 402 403 vmp->flags = 0; 404 405 if (flags & EDID_DET_TIMING_FLAG_INTERLACE) 406 vmp->flags |= VID_INTERLACE; 407 if (flags & EDID_DET_TIMING_FLAG_HSYNC_POSITIVE) 408 vmp->flags |= VID_PHSYNC; 409 else 410 vmp->flags |= VID_NHSYNC; 411 412 if (flags & EDID_DET_TIMING_FLAG_VSYNC_POSITIVE) 413 vmp->flags |= VID_PVSYNC; 414 else 415 vmp->flags |= VID_NVSYNC; 416 417 return 1; 418 } 419 420 static void 421 edid_block(struct edid_info *edid, uint8_t *data) 422 { 423 int i; 424 struct videomode mode, *exist_mode; 425 426 if (EDID_BLOCK_IS_DET_TIMING(data)) { 427 if (!edid_det_timing(data, &mode)) 428 return; 429 /* Does this mode already exist? */ 430 exist_mode = edid_search_mode(edid, &mode); 431 if (exist_mode != NULL) { 432 *exist_mode = mode; 433 if (edid->edid_preferred_mode == NULL) 434 edid->edid_preferred_mode = exist_mode; 435 } else { 436 edid->edid_modes[edid->edid_nmodes] = mode; 437 if (edid->edid_preferred_mode == NULL) 438 edid->edid_preferred_mode = 439 &edid->edid_modes[edid->edid_nmodes]; 440 edid->edid_nmodes++; 441 } 442 return; 443 } 444 445 switch (EDID_BLOCK_TYPE(data)) { 446 case EDID_DESC_BLOCK_TYPE_SERIAL: 447 memcpy(edid->edid_serial, data + EDID_DESC_ASCII_DATA_OFFSET, 448 EDID_DESC_ASCII_DATA_LEN); 449 edid->edid_serial[sizeof(edid->edid_serial) - 1] = 0; 450 break; 451 452 case EDID_DESC_BLOCK_TYPE_ASCII: 453 memcpy(edid->edid_comment, data + EDID_DESC_ASCII_DATA_OFFSET, 454 EDID_DESC_ASCII_DATA_LEN); 455 edid->edid_comment[sizeof(edid->edid_comment) - 1] = 0; 456 break; 457 458 case EDID_DESC_BLOCK_TYPE_RANGE: 459 edid->edid_have_range = 1; 460 edid->edid_range.er_min_vfreq = EDID_DESC_RANGE_MIN_VFREQ(data); 461 edid->edid_range.er_max_vfreq = EDID_DESC_RANGE_MAX_VFREQ(data); 462 edid->edid_range.er_min_hfreq = EDID_DESC_RANGE_MIN_HFREQ(data); 463 edid->edid_range.er_max_hfreq = EDID_DESC_RANGE_MAX_HFREQ(data); 464 edid->edid_range.er_max_clock = EDID_DESC_RANGE_MAX_CLOCK(data); 465 if (!EDID_DESC_RANGE_HAVE_GTF2(data)) 466 break; 467 edid->edid_range.er_have_gtf2 = 1; 468 edid->edid_range.er_gtf2_hfreq = 469 EDID_DESC_RANGE_GTF2_HFREQ(data); 470 edid->edid_range.er_gtf2_c = EDID_DESC_RANGE_GTF2_C(data); 471 edid->edid_range.er_gtf2_m = EDID_DESC_RANGE_GTF2_M(data); 472 edid->edid_range.er_gtf2_j = EDID_DESC_RANGE_GTF2_J(data); 473 edid->edid_range.er_gtf2_k = EDID_DESC_RANGE_GTF2_K(data); 474 break; 475 476 case EDID_DESC_BLOCK_TYPE_NAME: 477 /* copy the product name into place */ 478 memcpy(edid->edid_productname, 479 data + EDID_DESC_ASCII_DATA_OFFSET, 480 EDID_DESC_ASCII_DATA_LEN); 481 break; 482 483 case EDID_DESC_BLOCK_TYPE_STD_TIMING: 484 data += EDID_DESC_STD_TIMING_START; 485 for (i = 0; i < EDID_DESC_STD_TIMING_COUNT; i++) { 486 if (edid_std_timing(data, &mode)) { 487 /* Does this mode already exist? */ 488 exist_mode = edid_search_mode(edid, &mode); 489 if (exist_mode == NULL) { 490 edid->edid_modes[edid->edid_nmodes] = 491 mode; 492 edid->edid_nmodes++; 493 } 494 } 495 data += 2; 496 } 497 break; 498 499 case EDID_DESC_BLOCK_TYPE_COLOR_POINT: 500 /* XXX: not implemented yet */ 501 break; 502 } 503 } 504 505 /* 506 * Gets EDID version in BCD, e.g. EDID v1.3 returned as 0x0103 507 */ 508 int 509 edid_parse(uint8_t *data, struct edid_info *edid) 510 { 511 uint16_t manfid, estmodes; 512 const struct videomode *vmp; 513 int i; 514 const char *name; 515 int max_dotclock = 0; 516 int mhz; 517 518 if (edid_is_valid(data) != 0) 519 return -1; 520 521 /* get product identification */ 522 manfid = EDID_VENDOR_ID(data); 523 edid->edid_vendor[0] = EDID_MANFID_0(manfid); 524 edid->edid_vendor[1] = EDID_MANFID_1(manfid); 525 edid->edid_vendor[2] = EDID_MANFID_2(manfid); 526 edid->edid_vendor[3] = 0; /* null terminate for convenience */ 527 528 edid->edid_product = data[EDID_OFFSET_PRODUCT_ID] + 529 (data[EDID_OFFSET_PRODUCT_ID + 1] << 8); 530 531 name = edid_findvendor(edid->edid_vendor); 532 if (name != NULL) 533 strlcpy(edid->edid_vendorname, name, 534 sizeof(edid->edid_vendorname)); 535 else 536 edid->edid_vendorname[0] = '\0'; 537 538 name = edid_findproduct(edid->edid_vendor, edid->edid_product); 539 if (name != NULL) 540 strlcpy(edid->edid_productname, name, 541 sizeof(edid->edid_productname)); 542 else 543 edid->edid_productname[0] = '\0'; 544 545 snprintf(edid->edid_serial, sizeof(edid->edid_serial), "%08x", 546 EDID_SERIAL_NUMBER(data)); 547 548 edid->edid_week = EDID_WEEK(data); 549 edid->edid_year = EDID_YEAR(data); 550 551 /* get edid revision */ 552 edid->edid_version = EDID_VERSION(data); 553 edid->edid_revision = EDID_REVISION(data); 554 555 edid->edid_video_input = EDID_VIDEO_INPUT(data); 556 edid->edid_max_hsize = EDID_MAX_HSIZE(data); 557 edid->edid_max_vsize = EDID_MAX_VSIZE(data); 558 559 edid->edid_gamma = EDID_GAMMA(data); 560 edid->edid_features = EDID_FEATURES(data); 561 562 edid->edid_chroma.ec_redx = EDID_CHROMA_REDX(data); 563 edid->edid_chroma.ec_redy = EDID_CHROMA_REDX(data); 564 edid->edid_chroma.ec_greenx = EDID_CHROMA_GREENX(data); 565 edid->edid_chroma.ec_greeny = EDID_CHROMA_GREENY(data); 566 edid->edid_chroma.ec_bluex = EDID_CHROMA_BLUEX(data); 567 edid->edid_chroma.ec_bluey = EDID_CHROMA_BLUEY(data); 568 edid->edid_chroma.ec_whitex = EDID_CHROMA_WHITEX(data); 569 edid->edid_chroma.ec_whitey = EDID_CHROMA_WHITEY(data); 570 571 edid->edid_ext_block_count = EDID_EXT_BLOCK_COUNT(data); 572 573 /* lookup established modes */ 574 edid->edid_nmodes = 0; 575 edid->edid_preferred_mode = NULL; 576 estmodes = EDID_EST_TIMING(data); 577 /* Iterate in esztablished timing order */ 578 for (i = 15; i >= 0; i--) { 579 if (estmodes & (1 << i)) { 580 vmp = edid_mode_lookup_list(_edid_modes[i]); 581 if (vmp != NULL) { 582 edid->edid_modes[edid->edid_nmodes] = *vmp; 583 edid->edid_nmodes++; 584 } 585 #ifdef DIAGNOSTIC 586 else 587 printf("no data for est. mode %s\n", 588 _edid_modes[i]); 589 #endif 590 } 591 } 592 593 /* do standard timing section */ 594 for (i = 0; i < EDID_STD_TIMING_COUNT; i++) { 595 struct videomode mode, *exist_mode; 596 if (edid_std_timing(data + EDID_OFFSET_STD_TIMING + i * 2, 597 &mode)) { 598 /* Does this mode already exist? */ 599 exist_mode = edid_search_mode(edid, &mode); 600 if (exist_mode == NULL) { 601 edid->edid_modes[edid->edid_nmodes] = mode; 602 edid->edid_nmodes++; 603 } 604 } 605 } 606 607 /* do detailed timings and descriptors */ 608 for (i = 0; i < EDID_BLOCK_COUNT; i++) { 609 edid_block(edid, data + EDID_OFFSET_DESC_BLOCK + 610 i * EDID_BLOCK_SIZE); 611 } 612 613 edid_strchomp(edid->edid_vendorname); 614 edid_strchomp(edid->edid_productname); 615 edid_strchomp(edid->edid_serial); 616 edid_strchomp(edid->edid_comment); 617 618 /* 619 * XXX 620 * some monitors lie about their maximum supported dot clock 621 * by claiming to support modes which need a higher dot clock 622 * than the stated maximum. 623 * For sanity's sake we bump it to the highest dot clock we find 624 * in the list of supported modes 625 */ 626 for (i = 0; i < edid->edid_nmodes; i++) 627 if (edid->edid_modes[i].dot_clock > max_dotclock) 628 max_dotclock = edid->edid_modes[i].dot_clock; 629 if (bootverbose) { 630 printf("edid: max_dotclock according to supported modes: %d\n", 631 max_dotclock); 632 } 633 mhz = (max_dotclock + 999) / 1000; 634 635 if (edid->edid_have_range) { 636 if (mhz > edid->edid_range.er_max_clock) 637 edid->edid_range.er_max_clock = mhz; 638 } else 639 edid->edid_range.er_max_clock = mhz; 640 641 return 0; 642 } 643