1 /* 2 * Copyright (c) 2006 Luc Verhaegen (quirks list) 3 * Copyright (c) 2007-2008 Intel Corporation 4 * Jesse Barnes <jesse.barnes@intel.com> 5 * 6 * DDC probing routines (drm_ddc_read & drm_do_probe_ddc_edid) originally from 7 * FB layer. 8 * Copyright (C) 2006 Dennis Munsie <dmunsie@cecropia.com> 9 * 10 * Permission is hereby granted, free of charge, to any person obtaining a 11 * copy of this software and associated documentation files (the "Software"), 12 * to deal in the Software without restriction, including without limitation 13 * the rights to use, copy, modify, merge, publish, distribute, sub license, 14 * and/or sell copies of the Software, and to permit persons to whom the 15 * Software is furnished to do so, subject to the following conditions: 16 * 17 * The above copyright notice and this permission notice (including the 18 * next paragraph) shall be included in all copies or substantial portions 19 * of the Software. 20 * 21 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 22 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 23 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 24 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 25 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 26 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 27 * DEALINGS IN THE SOFTWARE. 28 */ 29 #include <linux/kernel.h> 30 #include <linux/i2c.h> 31 #include <linux/i2c-algo-bit.h> 32 #include "drmP.h" 33 #include "drm_edid.h" 34 35 /* 36 * TODO: 37 * - support EDID 1.4 (incl. CE blocks) 38 */ 39 40 /* 41 * EDID blocks out in the wild have a variety of bugs, try to collect 42 * them here (note that userspace may work around broken monitors first, 43 * but fixes should make their way here so that the kernel "just works" 44 * on as many displays as possible). 45 */ 46 47 /* First detailed mode wrong, use largest 60Hz mode */ 48 #define EDID_QUIRK_PREFER_LARGE_60 (1 << 0) 49 /* Reported 135MHz pixel clock is too high, needs adjustment */ 50 #define EDID_QUIRK_135_CLOCK_TOO_HIGH (1 << 1) 51 /* Prefer the largest mode at 75 Hz */ 52 #define EDID_QUIRK_PREFER_LARGE_75 (1 << 2) 53 /* Detail timing is in cm not mm */ 54 #define EDID_QUIRK_DETAILED_IN_CM (1 << 3) 55 /* Detailed timing descriptors have bogus size values, so just take the 56 * maximum size and use that. 57 */ 58 #define EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE (1 << 4) 59 /* Monitor forgot to set the first detailed is preferred bit. */ 60 #define EDID_QUIRK_FIRST_DETAILED_PREFERRED (1 << 5) 61 /* use +hsync +vsync for detailed mode */ 62 #define EDID_QUIRK_DETAILED_SYNC_PP (1 << 6) 63 /* define the number of Extension EDID block */ 64 #define MAX_EDID_EXT_NUM 4 65 66 #define LEVEL_DMT 0 67 #define LEVEL_GTF 1 68 #define LEVEL_CVT 2 69 70 static struct edid_quirk { 71 char *vendor; 72 int product_id; 73 u32 quirks; 74 } edid_quirk_list[] = { 75 /* Acer AL1706 */ 76 { "ACR", 44358, EDID_QUIRK_PREFER_LARGE_60 }, 77 /* Acer F51 */ 78 { "API", 0x7602, EDID_QUIRK_PREFER_LARGE_60 }, 79 /* Unknown Acer */ 80 { "ACR", 2423, EDID_QUIRK_FIRST_DETAILED_PREFERRED }, 81 82 /* Belinea 10 15 55 */ 83 { "MAX", 1516, EDID_QUIRK_PREFER_LARGE_60 }, 84 { "MAX", 0x77e, EDID_QUIRK_PREFER_LARGE_60 }, 85 86 /* Envision Peripherals, Inc. EN-7100e */ 87 { "EPI", 59264, EDID_QUIRK_135_CLOCK_TOO_HIGH }, 88 89 /* Funai Electronics PM36B */ 90 { "FCM", 13600, EDID_QUIRK_PREFER_LARGE_75 | 91 EDID_QUIRK_DETAILED_IN_CM }, 92 93 /* LG Philips LCD LP154W01-A5 */ 94 { "LPL", 0, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE }, 95 { "LPL", 0x2a00, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE }, 96 97 /* Philips 107p5 CRT */ 98 { "PHL", 57364, EDID_QUIRK_FIRST_DETAILED_PREFERRED }, 99 100 /* Proview AY765C */ 101 { "PTS", 765, EDID_QUIRK_FIRST_DETAILED_PREFERRED }, 102 103 /* Samsung SyncMaster 205BW. Note: irony */ 104 { "SAM", 541, EDID_QUIRK_DETAILED_SYNC_PP }, 105 /* Samsung SyncMaster 22[5-6]BW */ 106 { "SAM", 596, EDID_QUIRK_PREFER_LARGE_60 }, 107 { "SAM", 638, EDID_QUIRK_PREFER_LARGE_60 }, 108 }; 109 110 111 /* Valid EDID header has these bytes */ 112 static u8 edid_header[] = { 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 }; 113 114 /** 115 * edid_is_valid - sanity check EDID data 116 * @edid: EDID data 117 * 118 * Sanity check the EDID block by looking at the header, the version number 119 * and the checksum. Return 0 if the EDID doesn't check out, or 1 if it's 120 * valid. 121 */ 122 static bool edid_is_valid(struct edid *edid) 123 { 124 int i; 125 u8 csum = 0; 126 u8 *raw_edid = (u8 *)edid; 127 128 if (memcmp(edid->header, edid_header, sizeof(edid_header))) 129 goto bad; 130 if (edid->version != 1) { 131 DRM_ERROR("EDID has major version %d, instead of 1\n", edid->version); 132 goto bad; 133 } 134 if (edid->revision > 4) 135 DRM_DEBUG("EDID minor > 4, assuming backward compatibility\n"); 136 137 for (i = 0; i < EDID_LENGTH; i++) 138 csum += raw_edid[i]; 139 if (csum) { 140 DRM_ERROR("EDID checksum is invalid, remainder is %d\n", csum); 141 goto bad; 142 } 143 144 return 1; 145 146 bad: 147 if (raw_edid) { 148 DRM_ERROR("Raw EDID:\n"); 149 print_hex_dump_bytes(KERN_ERR, DUMP_PREFIX_NONE, raw_edid, EDID_LENGTH); 150 printk("\n"); 151 } 152 return 0; 153 } 154 155 /** 156 * edid_vendor - match a string against EDID's obfuscated vendor field 157 * @edid: EDID to match 158 * @vendor: vendor string 159 * 160 * Returns true if @vendor is in @edid, false otherwise 161 */ 162 static bool edid_vendor(struct edid *edid, char *vendor) 163 { 164 char edid_vendor[3]; 165 166 edid_vendor[0] = ((edid->mfg_id[0] & 0x7c) >> 2) + '@'; 167 edid_vendor[1] = (((edid->mfg_id[0] & 0x3) << 3) | 168 ((edid->mfg_id[1] & 0xe0) >> 5)) + '@'; 169 edid_vendor[2] = (edid->mfg_id[1] & 0x1f) + '@'; 170 171 return !strncmp(edid_vendor, vendor, 3); 172 } 173 174 /** 175 * edid_get_quirks - return quirk flags for a given EDID 176 * @edid: EDID to process 177 * 178 * This tells subsequent routines what fixes they need to apply. 179 */ 180 static u32 edid_get_quirks(struct edid *edid) 181 { 182 struct edid_quirk *quirk; 183 int i; 184 185 for (i = 0; i < ARRAY_SIZE(edid_quirk_list); i++) { 186 quirk = &edid_quirk_list[i]; 187 188 if (edid_vendor(edid, quirk->vendor) && 189 (EDID_PRODUCT_ID(edid) == quirk->product_id)) 190 return quirk->quirks; 191 } 192 193 return 0; 194 } 195 196 #define MODE_SIZE(m) ((m)->hdisplay * (m)->vdisplay) 197 #define MODE_REFRESH_DIFF(m,r) (abs((m)->vrefresh - target_refresh)) 198 199 200 /** 201 * edid_fixup_preferred - set preferred modes based on quirk list 202 * @connector: has mode list to fix up 203 * @quirks: quirks list 204 * 205 * Walk the mode list for @connector, clearing the preferred status 206 * on existing modes and setting it anew for the right mode ala @quirks. 207 */ 208 static void edid_fixup_preferred(struct drm_connector *connector, 209 u32 quirks) 210 { 211 struct drm_display_mode *t, *cur_mode, *preferred_mode; 212 int target_refresh = 0; 213 214 if (list_empty(&connector->probed_modes)) 215 return; 216 217 if (quirks & EDID_QUIRK_PREFER_LARGE_60) 218 target_refresh = 60; 219 if (quirks & EDID_QUIRK_PREFER_LARGE_75) 220 target_refresh = 75; 221 222 preferred_mode = list_first_entry(&connector->probed_modes, 223 struct drm_display_mode, head); 224 225 list_for_each_entry_safe(cur_mode, t, &connector->probed_modes, head) { 226 cur_mode->type &= ~DRM_MODE_TYPE_PREFERRED; 227 228 if (cur_mode == preferred_mode) 229 continue; 230 231 /* Largest mode is preferred */ 232 if (MODE_SIZE(cur_mode) > MODE_SIZE(preferred_mode)) 233 preferred_mode = cur_mode; 234 235 /* At a given size, try to get closest to target refresh */ 236 if ((MODE_SIZE(cur_mode) == MODE_SIZE(preferred_mode)) && 237 MODE_REFRESH_DIFF(cur_mode, target_refresh) < 238 MODE_REFRESH_DIFF(preferred_mode, target_refresh)) { 239 preferred_mode = cur_mode; 240 } 241 } 242 243 preferred_mode->type |= DRM_MODE_TYPE_PREFERRED; 244 } 245 246 /* 247 * Add the Autogenerated from the DMT spec. 248 * This table is copied from xfree86/modes/xf86EdidModes.c. 249 * But the mode with Reduced blank feature is deleted. 250 */ 251 static struct drm_display_mode drm_dmt_modes[] = { 252 /* 640x350@85Hz */ 253 { DRM_MODE("640x350", DRM_MODE_TYPE_DRIVER, 31500, 640, 672, 254 736, 832, 0, 350, 382, 385, 445, 0, 255 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC) }, 256 /* 640x400@85Hz */ 257 { DRM_MODE("640x400", DRM_MODE_TYPE_DRIVER, 31500, 640, 672, 258 736, 832, 0, 400, 401, 404, 445, 0, 259 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, 260 /* 720x400@85Hz */ 261 { DRM_MODE("720x400", DRM_MODE_TYPE_DRIVER, 35500, 720, 756, 262 828, 936, 0, 400, 401, 404, 446, 0, 263 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, 264 /* 640x480@60Hz */ 265 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 25175, 640, 656, 266 752, 800, 0, 480, 489, 492, 525, 0, 267 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, 268 /* 640x480@72Hz */ 269 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 664, 270 704, 832, 0, 480, 489, 492, 520, 0, 271 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, 272 /* 640x480@75Hz */ 273 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 656, 274 720, 840, 0, 480, 481, 484, 500, 0, 275 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, 276 /* 640x480@85Hz */ 277 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 36000, 640, 696, 278 752, 832, 0, 480, 481, 484, 509, 0, 279 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, 280 /* 800x600@56Hz */ 281 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 36000, 800, 824, 282 896, 1024, 0, 600, 601, 603, 625, 0, 283 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, 284 /* 800x600@60Hz */ 285 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 40000, 800, 840, 286 968, 1056, 0, 600, 601, 605, 628, 0, 287 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, 288 /* 800x600@72Hz */ 289 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 50000, 800, 856, 290 976, 1040, 0, 600, 637, 643, 666, 0, 291 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, 292 /* 800x600@75Hz */ 293 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 49500, 800, 816, 294 896, 1056, 0, 600, 601, 604, 625, 0, 295 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, 296 /* 800x600@85Hz */ 297 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 56250, 800, 832, 298 896, 1048, 0, 600, 601, 604, 631, 0, 299 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, 300 /* 848x480@60Hz */ 301 { DRM_MODE("848x480", DRM_MODE_TYPE_DRIVER, 33750, 848, 864, 302 976, 1088, 0, 480, 486, 494, 517, 0, 303 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, 304 /* 1024x768@43Hz, interlace */ 305 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 44900, 1024, 1032, 306 1208, 1264, 0, 768, 768, 772, 817, 0, 307 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC | 308 DRM_MODE_FLAG_INTERLACE) }, 309 /* 1024x768@60Hz */ 310 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 65000, 1024, 1048, 311 1184, 1344, 0, 768, 771, 777, 806, 0, 312 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, 313 /* 1024x768@70Hz */ 314 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 75000, 1024, 1048, 315 1184, 1328, 0, 768, 771, 777, 806, 0, 316 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, 317 /* 1024x768@75Hz */ 318 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 78750, 1024, 1040, 319 1136, 1312, 0, 768, 769, 772, 800, 0, 320 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, 321 /* 1024x768@85Hz */ 322 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 94500, 1024, 1072, 323 1072, 1376, 0, 768, 769, 772, 808, 0, 324 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, 325 /* 1152x864@75Hz */ 326 { DRM_MODE("1152x864", DRM_MODE_TYPE_DRIVER, 108000, 1152, 1216, 327 1344, 1600, 0, 864, 865, 868, 900, 0, 328 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, 329 /* 1280x768@60Hz */ 330 { DRM_MODE("1280x768", DRM_MODE_TYPE_DRIVER, 79500, 1280, 1344, 331 1472, 1664, 0, 768, 771, 778, 798, 0, 332 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, 333 /* 1280x768@75Hz */ 334 { DRM_MODE("1280x768", DRM_MODE_TYPE_DRIVER, 102250, 1280, 1360, 335 1488, 1696, 0, 768, 771, 778, 805, 0, 336 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC) }, 337 /* 1280x768@85Hz */ 338 { DRM_MODE("1280x768", DRM_MODE_TYPE_DRIVER, 117500, 1280, 1360, 339 1496, 1712, 0, 768, 771, 778, 809, 0, 340 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, 341 /* 1280x800@60Hz */ 342 { DRM_MODE("1280x800", DRM_MODE_TYPE_DRIVER, 83500, 1280, 1352, 343 1480, 1680, 0, 800, 803, 809, 831, 0, 344 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC) }, 345 /* 1280x800@75Hz */ 346 { DRM_MODE("1280x800", DRM_MODE_TYPE_DRIVER, 106500, 1280, 1360, 347 1488, 1696, 0, 800, 803, 809, 838, 0, 348 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, 349 /* 1280x800@85Hz */ 350 { DRM_MODE("1280x800", DRM_MODE_TYPE_DRIVER, 122500, 1280, 1360, 351 1496, 1712, 0, 800, 803, 809, 843, 0, 352 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, 353 /* 1280x960@60Hz */ 354 { DRM_MODE("1280x960", DRM_MODE_TYPE_DRIVER, 108000, 1280, 1376, 355 1488, 1800, 0, 960, 961, 964, 1000, 0, 356 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, 357 /* 1280x960@85Hz */ 358 { DRM_MODE("1280x960", DRM_MODE_TYPE_DRIVER, 148500, 1280, 1344, 359 1504, 1728, 0, 960, 961, 964, 1011, 0, 360 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, 361 /* 1280x1024@60Hz */ 362 { DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 108000, 1280, 1328, 363 1440, 1688, 0, 1024, 1025, 1028, 1066, 0, 364 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, 365 /* 1280x1024@75Hz */ 366 { DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 135000, 1280, 1296, 367 1440, 1688, 0, 1024, 1025, 1028, 1066, 0, 368 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, 369 /* 1280x1024@85Hz */ 370 { DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 157500, 1280, 1344, 371 1504, 1728, 0, 1024, 1025, 1028, 1072, 0, 372 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, 373 /* 1360x768@60Hz */ 374 { DRM_MODE("1360x768", DRM_MODE_TYPE_DRIVER, 85500, 1360, 1424, 375 1536, 1792, 0, 768, 771, 777, 795, 0, 376 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, 377 /* 1440x1050@60Hz */ 378 { DRM_MODE("1400x1050", DRM_MODE_TYPE_DRIVER, 121750, 1400, 1488, 379 1632, 1864, 0, 1050, 1053, 1057, 1089, 0, 380 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, 381 /* 1440x1050@75Hz */ 382 { DRM_MODE("1400x1050", DRM_MODE_TYPE_DRIVER, 156000, 1400, 1504, 383 1648, 1896, 0, 1050, 1053, 1057, 1099, 0, 384 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, 385 /* 1440x1050@85Hz */ 386 { DRM_MODE("1400x1050", DRM_MODE_TYPE_DRIVER, 179500, 1400, 1504, 387 1656, 1912, 0, 1050, 1053, 1057, 1105, 0, 388 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, 389 /* 1440x900@60Hz */ 390 { DRM_MODE("1440x900", DRM_MODE_TYPE_DRIVER, 106500, 1440, 1520, 391 1672, 1904, 0, 900, 903, 909, 934, 0, 392 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, 393 /* 1440x900@75Hz */ 394 { DRM_MODE("1440x900", DRM_MODE_TYPE_DRIVER, 136750, 1440, 1536, 395 1688, 1936, 0, 900, 903, 909, 942, 0, 396 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, 397 /* 1440x900@85Hz */ 398 { DRM_MODE("1440x900", DRM_MODE_TYPE_DRIVER, 157000, 1440, 1544, 399 1696, 1952, 0, 900, 903, 909, 948, 0, 400 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, 401 /* 1600x1200@60Hz */ 402 { DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 162000, 1600, 1664, 403 1856, 2160, 0, 1200, 1201, 1204, 1250, 0, 404 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, 405 /* 1600x1200@65Hz */ 406 { DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 175500, 1600, 1664, 407 1856, 2160, 0, 1200, 1201, 1204, 1250, 0, 408 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, 409 /* 1600x1200@70Hz */ 410 { DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 189000, 1600, 1664, 411 1856, 2160, 0, 1200, 1201, 1204, 1250, 0, 412 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, 413 /* 1600x1200@75Hz */ 414 { DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 2025000, 1600, 1664, 415 1856, 2160, 0, 1200, 1201, 1204, 1250, 0, 416 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, 417 /* 1600x1200@85Hz */ 418 { DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 229500, 1600, 1664, 419 1856, 2160, 0, 1200, 1201, 1204, 1250, 0, 420 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, 421 /* 1680x1050@60Hz */ 422 { DRM_MODE("1680x1050", DRM_MODE_TYPE_DRIVER, 146250, 1680, 1784, 423 1960, 2240, 0, 1050, 1053, 1059, 1089, 0, 424 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, 425 /* 1680x1050@75Hz */ 426 { DRM_MODE("1680x1050", DRM_MODE_TYPE_DRIVER, 187000, 1680, 1800, 427 1976, 2272, 0, 1050, 1053, 1059, 1099, 0, 428 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, 429 /* 1680x1050@85Hz */ 430 { DRM_MODE("1680x1050", DRM_MODE_TYPE_DRIVER, 214750, 1680, 1808, 431 1984, 2288, 0, 1050, 1053, 1059, 1105, 0, 432 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, 433 /* 1792x1344@60Hz */ 434 { DRM_MODE("1792x1344", DRM_MODE_TYPE_DRIVER, 204750, 1792, 1920, 435 2120, 2448, 0, 1344, 1345, 1348, 1394, 0, 436 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, 437 /* 1729x1344@75Hz */ 438 { DRM_MODE("1792x1344", DRM_MODE_TYPE_DRIVER, 261000, 1792, 1888, 439 2104, 2456, 0, 1344, 1345, 1348, 1417, 0, 440 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, 441 /* 1853x1392@60Hz */ 442 { DRM_MODE("1856x1392", DRM_MODE_TYPE_DRIVER, 218250, 1856, 1952, 443 2176, 2528, 0, 1392, 1393, 1396, 1439, 0, 444 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, 445 /* 1856x1392@75Hz */ 446 { DRM_MODE("1856x1392", DRM_MODE_TYPE_DRIVER, 288000, 1856, 1984, 447 2208, 2560, 0, 1392, 1395, 1399, 1500, 0, 448 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, 449 /* 1920x1200@60Hz */ 450 { DRM_MODE("1920x1200", DRM_MODE_TYPE_DRIVER, 193250, 1920, 2056, 451 2256, 2592, 0, 1200, 1203, 1209, 1245, 0, 452 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, 453 /* 1920x1200@75Hz */ 454 { DRM_MODE("1920x1200", DRM_MODE_TYPE_DRIVER, 245250, 1920, 2056, 455 2264, 2608, 0, 1200, 1203, 1209, 1255, 0, 456 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, 457 /* 1920x1200@85Hz */ 458 { DRM_MODE("1920x1200", DRM_MODE_TYPE_DRIVER, 281250, 1920, 2064, 459 2272, 2624, 0, 1200, 1203, 1209, 1262, 0, 460 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, 461 /* 1920x1440@60Hz */ 462 { DRM_MODE("1920x1440", DRM_MODE_TYPE_DRIVER, 234000, 1920, 2048, 463 2256, 2600, 0, 1440, 1441, 1444, 1500, 0, 464 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, 465 /* 1920x1440@75Hz */ 466 { DRM_MODE("1920x1440", DRM_MODE_TYPE_DRIVER, 297000, 1920, 2064, 467 2288, 2640, 0, 1440, 1441, 1444, 1500, 0, 468 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, 469 /* 2560x1600@60Hz */ 470 { DRM_MODE("2560x1600", DRM_MODE_TYPE_DRIVER, 348500, 2560, 2752, 471 3032, 3504, 0, 1600, 1603, 1609, 1658, 0, 472 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, 473 /* 2560x1600@75HZ */ 474 { DRM_MODE("2560x1600", DRM_MODE_TYPE_DRIVER, 443250, 2560, 2768, 475 3048, 3536, 0, 1600, 1603, 1609, 1672, 0, 476 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, 477 /* 2560x1600@85HZ */ 478 { DRM_MODE("2560x1600", DRM_MODE_TYPE_DRIVER, 505250, 2560, 2768, 479 3048, 3536, 0, 1600, 1603, 1609, 1682, 0, 480 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, 481 }; 482 483 static struct drm_display_mode *drm_find_dmt(struct drm_device *dev, 484 int hsize, int vsize, int fresh) 485 { 486 int i, count; 487 struct drm_display_mode *ptr, *mode; 488 489 count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode); 490 mode = NULL; 491 for (i = 0; i < count; i++) { 492 ptr = &drm_dmt_modes[i]; 493 if (hsize == ptr->hdisplay && 494 vsize == ptr->vdisplay && 495 fresh == drm_mode_vrefresh(ptr)) { 496 /* get the expected default mode */ 497 mode = drm_mode_duplicate(dev, ptr); 498 break; 499 } 500 } 501 return mode; 502 } 503 /** 504 * drm_mode_std - convert standard mode info (width, height, refresh) into mode 505 * @t: standard timing params 506 * @timing_level: standard timing level 507 * 508 * Take the standard timing params (in this case width, aspect, and refresh) 509 * and convert them into a real mode using CVT/GTF/DMT. 510 * 511 * Punts for now, but should eventually use the FB layer's CVT based mode 512 * generation code. 513 */ 514 struct drm_display_mode *drm_mode_std(struct drm_device *dev, 515 struct std_timing *t, 516 int timing_level) 517 { 518 struct drm_display_mode *mode; 519 int hsize, vsize; 520 int vrefresh_rate; 521 unsigned aspect_ratio = (t->vfreq_aspect & EDID_TIMING_ASPECT_MASK) 522 >> EDID_TIMING_ASPECT_SHIFT; 523 unsigned vfreq = (t->vfreq_aspect & EDID_TIMING_VFREQ_MASK) 524 >> EDID_TIMING_VFREQ_SHIFT; 525 526 /* According to the EDID spec, the hdisplay = hsize * 8 + 248 */ 527 hsize = t->hsize * 8 + 248; 528 /* vrefresh_rate = vfreq + 60 */ 529 vrefresh_rate = vfreq + 60; 530 /* the vdisplay is calculated based on the aspect ratio */ 531 if (aspect_ratio == 0) 532 vsize = (hsize * 10) / 16; 533 else if (aspect_ratio == 1) 534 vsize = (hsize * 3) / 4; 535 else if (aspect_ratio == 2) 536 vsize = (hsize * 4) / 5; 537 else 538 vsize = (hsize * 9) / 16; 539 /* HDTV hack */ 540 if (hsize == 1360 && vsize == 765 && vrefresh_rate == 60) { 541 mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0); 542 mode->hdisplay = 1366; 543 mode->vsync_start = mode->vsync_start - 1; 544 mode->vsync_end = mode->vsync_end - 1; 545 return mode; 546 } 547 mode = NULL; 548 /* check whether it can be found in default mode table */ 549 mode = drm_find_dmt(dev, hsize, vsize, vrefresh_rate); 550 if (mode) 551 return mode; 552 553 switch (timing_level) { 554 case LEVEL_DMT: 555 break; 556 case LEVEL_GTF: 557 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0); 558 break; 559 case LEVEL_CVT: 560 mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0); 561 break; 562 } 563 return mode; 564 } 565 566 /** 567 * drm_mode_detailed - create a new mode from an EDID detailed timing section 568 * @dev: DRM device (needed to create new mode) 569 * @edid: EDID block 570 * @timing: EDID detailed timing info 571 * @quirks: quirks to apply 572 * 573 * An EDID detailed timing block contains enough info for us to create and 574 * return a new struct drm_display_mode. 575 */ 576 static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev, 577 struct edid *edid, 578 struct detailed_timing *timing, 579 u32 quirks) 580 { 581 struct drm_display_mode *mode; 582 struct detailed_pixel_timing *pt = &timing->data.pixel_data; 583 unsigned hactive = (pt->hactive_hblank_hi & 0xf0) << 4 | pt->hactive_lo; 584 unsigned vactive = (pt->vactive_vblank_hi & 0xf0) << 4 | pt->vactive_lo; 585 unsigned hblank = (pt->hactive_hblank_hi & 0xf) << 8 | pt->hblank_lo; 586 unsigned vblank = (pt->vactive_vblank_hi & 0xf) << 8 | pt->vblank_lo; 587 unsigned hsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc0) << 2 | pt->hsync_offset_lo; 588 unsigned hsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x30) << 4 | pt->hsync_pulse_width_lo; 589 unsigned vsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc) >> 2 | pt->vsync_offset_pulse_width_lo >> 4; 590 unsigned vsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x3) << 4 | (pt->vsync_offset_pulse_width_lo & 0xf); 591 592 /* ignore tiny modes */ 593 if (hactive < 64 || vactive < 64) 594 return NULL; 595 596 if (pt->misc & DRM_EDID_PT_STEREO) { 597 printk(KERN_WARNING "stereo mode not supported\n"); 598 return NULL; 599 } 600 if (!(pt->misc & DRM_EDID_PT_SEPARATE_SYNC)) { 601 printk(KERN_WARNING "integrated sync not supported\n"); 602 return NULL; 603 } 604 605 mode = drm_mode_create(dev); 606 if (!mode) 607 return NULL; 608 609 mode->type = DRM_MODE_TYPE_DRIVER; 610 611 if (quirks & EDID_QUIRK_135_CLOCK_TOO_HIGH) 612 timing->pixel_clock = cpu_to_le16(1088); 613 614 mode->clock = le16_to_cpu(timing->pixel_clock) * 10; 615 616 mode->hdisplay = hactive; 617 mode->hsync_start = mode->hdisplay + hsync_offset; 618 mode->hsync_end = mode->hsync_start + hsync_pulse_width; 619 mode->htotal = mode->hdisplay + hblank; 620 621 mode->vdisplay = vactive; 622 mode->vsync_start = mode->vdisplay + vsync_offset; 623 mode->vsync_end = mode->vsync_start + vsync_pulse_width; 624 mode->vtotal = mode->vdisplay + vblank; 625 626 drm_mode_set_name(mode); 627 628 if (pt->misc & DRM_EDID_PT_INTERLACED) 629 mode->flags |= DRM_MODE_FLAG_INTERLACE; 630 631 if (quirks & EDID_QUIRK_DETAILED_SYNC_PP) { 632 pt->misc |= DRM_EDID_PT_HSYNC_POSITIVE | DRM_EDID_PT_VSYNC_POSITIVE; 633 } 634 635 mode->flags |= (pt->misc & DRM_EDID_PT_HSYNC_POSITIVE) ? 636 DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC; 637 mode->flags |= (pt->misc & DRM_EDID_PT_VSYNC_POSITIVE) ? 638 DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC; 639 640 mode->width_mm = pt->width_mm_lo | (pt->width_height_mm_hi & 0xf0) << 4; 641 mode->height_mm = pt->height_mm_lo | (pt->width_height_mm_hi & 0xf) << 8; 642 643 if (quirks & EDID_QUIRK_DETAILED_IN_CM) { 644 mode->width_mm *= 10; 645 mode->height_mm *= 10; 646 } 647 648 if (quirks & EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE) { 649 mode->width_mm = edid->width_cm * 10; 650 mode->height_mm = edid->height_cm * 10; 651 } 652 653 return mode; 654 } 655 656 /* 657 * Detailed mode info for the EDID "established modes" data to use. 658 */ 659 static struct drm_display_mode edid_est_modes[] = { 660 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 40000, 800, 840, 661 968, 1056, 0, 600, 601, 605, 628, 0, 662 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@60Hz */ 663 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 36000, 800, 824, 664 896, 1024, 0, 600, 601, 603, 625, 0, 665 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@56Hz */ 666 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 656, 667 720, 840, 0, 480, 481, 484, 500, 0, 668 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@75Hz */ 669 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 664, 670 704, 832, 0, 480, 489, 491, 520, 0, 671 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@72Hz */ 672 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 30240, 640, 704, 673 768, 864, 0, 480, 483, 486, 525, 0, 674 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@67Hz */ 675 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 25200, 640, 656, 676 752, 800, 0, 480, 490, 492, 525, 0, 677 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@60Hz */ 678 { DRM_MODE("720x400", DRM_MODE_TYPE_DRIVER, 35500, 720, 738, 679 846, 900, 0, 400, 421, 423, 449, 0, 680 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 720x400@88Hz */ 681 { DRM_MODE("720x400", DRM_MODE_TYPE_DRIVER, 28320, 720, 738, 682 846, 900, 0, 400, 412, 414, 449, 0, 683 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 720x400@70Hz */ 684 { DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 135000, 1280, 1296, 685 1440, 1688, 0, 1024, 1025, 1028, 1066, 0, 686 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 1280x1024@75Hz */ 687 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 78800, 1024, 1040, 688 1136, 1312, 0, 768, 769, 772, 800, 0, 689 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 1024x768@75Hz */ 690 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 75000, 1024, 1048, 691 1184, 1328, 0, 768, 771, 777, 806, 0, 692 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 1024x768@70Hz */ 693 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 65000, 1024, 1048, 694 1184, 1344, 0, 768, 771, 777, 806, 0, 695 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 1024x768@60Hz */ 696 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER,44900, 1024, 1032, 697 1208, 1264, 0, 768, 768, 776, 817, 0, 698 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC | DRM_MODE_FLAG_INTERLACE) }, /* 1024x768@43Hz */ 699 { DRM_MODE("832x624", DRM_MODE_TYPE_DRIVER, 57284, 832, 864, 700 928, 1152, 0, 624, 625, 628, 667, 0, 701 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 832x624@75Hz */ 702 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 49500, 800, 816, 703 896, 1056, 0, 600, 601, 604, 625, 0, 704 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@75Hz */ 705 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 50000, 800, 856, 706 976, 1040, 0, 600, 637, 643, 666, 0, 707 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@72Hz */ 708 { DRM_MODE("1152x864", DRM_MODE_TYPE_DRIVER, 108000, 1152, 1216, 709 1344, 1600, 0, 864, 865, 868, 900, 0, 710 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 1152x864@75Hz */ 711 }; 712 713 #define EDID_EST_TIMINGS 16 714 #define EDID_STD_TIMINGS 8 715 #define EDID_DETAILED_TIMINGS 4 716 717 /** 718 * add_established_modes - get est. modes from EDID and add them 719 * @edid: EDID block to scan 720 * 721 * Each EDID block contains a bitmap of the supported "established modes" list 722 * (defined above). Tease them out and add them to the global modes list. 723 */ 724 static int add_established_modes(struct drm_connector *connector, struct edid *edid) 725 { 726 struct drm_device *dev = connector->dev; 727 unsigned long est_bits = edid->established_timings.t1 | 728 (edid->established_timings.t2 << 8) | 729 ((edid->established_timings.mfg_rsvd & 0x80) << 9); 730 int i, modes = 0; 731 732 for (i = 0; i <= EDID_EST_TIMINGS; i++) 733 if (est_bits & (1<<i)) { 734 struct drm_display_mode *newmode; 735 newmode = drm_mode_duplicate(dev, &edid_est_modes[i]); 736 if (newmode) { 737 drm_mode_probed_add(connector, newmode); 738 modes++; 739 } 740 } 741 742 return modes; 743 } 744 /** 745 * stanard_timing_level - get std. timing level(CVT/GTF/DMT) 746 * @edid: EDID block to scan 747 */ 748 static int standard_timing_level(struct edid *edid) 749 { 750 if (edid->revision >= 2) { 751 if (edid->revision >= 4 && (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF)) 752 return LEVEL_CVT; 753 return LEVEL_GTF; 754 } 755 return LEVEL_DMT; 756 } 757 758 /** 759 * add_standard_modes - get std. modes from EDID and add them 760 * @edid: EDID block to scan 761 * 762 * Standard modes can be calculated using the CVT standard. Grab them from 763 * @edid, calculate them, and add them to the list. 764 */ 765 static int add_standard_modes(struct drm_connector *connector, struct edid *edid) 766 { 767 struct drm_device *dev = connector->dev; 768 int i, modes = 0; 769 int timing_level; 770 771 timing_level = standard_timing_level(edid); 772 773 for (i = 0; i < EDID_STD_TIMINGS; i++) { 774 struct std_timing *t = &edid->standard_timings[i]; 775 struct drm_display_mode *newmode; 776 777 /* If std timings bytes are 1, 1 it's empty */ 778 if (t->hsize == 1 && t->vfreq_aspect == 1) 779 continue; 780 781 newmode = drm_mode_std(dev, &edid->standard_timings[i], 782 timing_level); 783 if (newmode) { 784 drm_mode_probed_add(connector, newmode); 785 modes++; 786 } 787 } 788 789 return modes; 790 } 791 792 /** 793 * add_detailed_modes - get detailed mode info from EDID data 794 * @connector: attached connector 795 * @edid: EDID block to scan 796 * @quirks: quirks to apply 797 * 798 * Some of the detailed timing sections may contain mode information. Grab 799 * it and add it to the list. 800 */ 801 static int add_detailed_info(struct drm_connector *connector, 802 struct edid *edid, u32 quirks) 803 { 804 struct drm_device *dev = connector->dev; 805 int i, j, modes = 0; 806 int timing_level; 807 808 timing_level = standard_timing_level(edid); 809 810 for (i = 0; i < EDID_DETAILED_TIMINGS; i++) { 811 struct detailed_timing *timing = &edid->detailed_timings[i]; 812 struct detailed_non_pixel *data = &timing->data.other_data; 813 struct drm_display_mode *newmode; 814 815 /* X server check is version 1.1 or higher */ 816 if (edid->version == 1 && edid->revision >= 1 && 817 !timing->pixel_clock) { 818 /* Other timing or info */ 819 switch (data->type) { 820 case EDID_DETAIL_MONITOR_SERIAL: 821 break; 822 case EDID_DETAIL_MONITOR_STRING: 823 break; 824 case EDID_DETAIL_MONITOR_RANGE: 825 /* Get monitor range data */ 826 break; 827 case EDID_DETAIL_MONITOR_NAME: 828 break; 829 case EDID_DETAIL_MONITOR_CPDATA: 830 break; 831 case EDID_DETAIL_STD_MODES: 832 /* Five modes per detailed section */ 833 for (j = 0; j < 5; i++) { 834 struct std_timing *std; 835 struct drm_display_mode *newmode; 836 837 std = &data->data.timings[j]; 838 newmode = drm_mode_std(dev, std, 839 timing_level); 840 if (newmode) { 841 drm_mode_probed_add(connector, newmode); 842 modes++; 843 } 844 } 845 break; 846 default: 847 break; 848 } 849 } else { 850 newmode = drm_mode_detailed(dev, edid, timing, quirks); 851 if (!newmode) 852 continue; 853 854 /* First detailed mode is preferred */ 855 if (i == 0 && (edid->features & DRM_EDID_FEATURE_PREFERRED_TIMING)) 856 newmode->type |= DRM_MODE_TYPE_PREFERRED; 857 drm_mode_probed_add(connector, newmode); 858 859 modes++; 860 } 861 } 862 863 return modes; 864 } 865 /** 866 * add_detailed_mode_eedid - get detailed mode info from addtional timing 867 * EDID block 868 * @connector: attached connector 869 * @edid: EDID block to scan(It is only to get addtional timing EDID block) 870 * @quirks: quirks to apply 871 * 872 * Some of the detailed timing sections may contain mode information. Grab 873 * it and add it to the list. 874 */ 875 static int add_detailed_info_eedid(struct drm_connector *connector, 876 struct edid *edid, u32 quirks) 877 { 878 struct drm_device *dev = connector->dev; 879 int i, j, modes = 0; 880 char *edid_ext = NULL; 881 struct detailed_timing *timing; 882 struct detailed_non_pixel *data; 883 struct drm_display_mode *newmode; 884 int edid_ext_num; 885 int start_offset, end_offset; 886 int timing_level; 887 888 if (edid->version == 1 && edid->revision < 3) { 889 /* If the EDID version is less than 1.3, there is no 890 * extension EDID. 891 */ 892 return 0; 893 } 894 if (!edid->extensions) { 895 /* if there is no extension EDID, it is unnecessary to 896 * parse the E-EDID to get detailed info 897 */ 898 return 0; 899 } 900 901 /* Chose real EDID extension number */ 902 edid_ext_num = edid->extensions > MAX_EDID_EXT_NUM ? 903 MAX_EDID_EXT_NUM : edid->extensions; 904 905 /* Find CEA extension */ 906 for (i = 0; i < edid_ext_num; i++) { 907 edid_ext = (char *)edid + EDID_LENGTH * (i + 1); 908 /* This block is CEA extension */ 909 if (edid_ext[0] == 0x02) 910 break; 911 } 912 913 if (i == edid_ext_num) { 914 /* if there is no additional timing EDID block, return */ 915 return 0; 916 } 917 918 /* Get the start offset of detailed timing block */ 919 start_offset = edid_ext[2]; 920 if (start_offset == 0) { 921 /* If the start_offset is zero, it means that neither detailed 922 * info nor data block exist. In such case it is also 923 * unnecessary to parse the detailed timing info. 924 */ 925 return 0; 926 } 927 928 timing_level = standard_timing_level(edid); 929 end_offset = EDID_LENGTH; 930 end_offset -= sizeof(struct detailed_timing); 931 for (i = start_offset; i < end_offset; 932 i += sizeof(struct detailed_timing)) { 933 timing = (struct detailed_timing *)(edid_ext + i); 934 data = &timing->data.other_data; 935 /* Detailed mode timing */ 936 if (timing->pixel_clock) { 937 newmode = drm_mode_detailed(dev, edid, timing, quirks); 938 if (!newmode) 939 continue; 940 941 drm_mode_probed_add(connector, newmode); 942 943 modes++; 944 continue; 945 } 946 947 /* Other timing or info */ 948 switch (data->type) { 949 case EDID_DETAIL_MONITOR_SERIAL: 950 break; 951 case EDID_DETAIL_MONITOR_STRING: 952 break; 953 case EDID_DETAIL_MONITOR_RANGE: 954 /* Get monitor range data */ 955 break; 956 case EDID_DETAIL_MONITOR_NAME: 957 break; 958 case EDID_DETAIL_MONITOR_CPDATA: 959 break; 960 case EDID_DETAIL_STD_MODES: 961 /* Five modes per detailed section */ 962 for (j = 0; j < 5; i++) { 963 struct std_timing *std; 964 struct drm_display_mode *newmode; 965 966 std = &data->data.timings[j]; 967 newmode = drm_mode_std(dev, std, timing_level); 968 if (newmode) { 969 drm_mode_probed_add(connector, newmode); 970 modes++; 971 } 972 } 973 break; 974 default: 975 break; 976 } 977 } 978 979 return modes; 980 } 981 982 #define DDC_ADDR 0x50 983 /** 984 * Get EDID information via I2C. 985 * 986 * \param adapter : i2c device adaptor 987 * \param buf : EDID data buffer to be filled 988 * \param len : EDID data buffer length 989 * \return 0 on success or -1 on failure. 990 * 991 * Try to fetch EDID information by calling i2c driver function. 992 */ 993 int drm_do_probe_ddc_edid(struct i2c_adapter *adapter, 994 unsigned char *buf, int len) 995 { 996 unsigned char start = 0x0; 997 struct i2c_msg msgs[] = { 998 { 999 .addr = DDC_ADDR, 1000 .flags = 0, 1001 .len = 1, 1002 .buf = &start, 1003 }, { 1004 .addr = DDC_ADDR, 1005 .flags = I2C_M_RD, 1006 .len = len, 1007 .buf = buf, 1008 } 1009 }; 1010 1011 if (i2c_transfer(adapter, msgs, 2) == 2) 1012 return 0; 1013 1014 return -1; 1015 } 1016 EXPORT_SYMBOL(drm_do_probe_ddc_edid); 1017 1018 static int drm_ddc_read_edid(struct drm_connector *connector, 1019 struct i2c_adapter *adapter, 1020 char *buf, int len) 1021 { 1022 int ret; 1023 1024 ret = drm_do_probe_ddc_edid(adapter, buf, len); 1025 if (ret != 0) { 1026 goto end; 1027 } 1028 if (!edid_is_valid((struct edid *)buf)) { 1029 dev_warn(&connector->dev->pdev->dev, "%s: EDID invalid.\n", 1030 drm_get_connector_name(connector)); 1031 ret = -1; 1032 } 1033 end: 1034 return ret; 1035 } 1036 1037 /** 1038 * drm_get_edid - get EDID data, if available 1039 * @connector: connector we're probing 1040 * @adapter: i2c adapter to use for DDC 1041 * 1042 * Poke the given connector's i2c channel to grab EDID data if possible. 1043 * 1044 * Return edid data or NULL if we couldn't find any. 1045 */ 1046 struct edid *drm_get_edid(struct drm_connector *connector, 1047 struct i2c_adapter *adapter) 1048 { 1049 int ret; 1050 struct edid *edid; 1051 1052 edid = kmalloc(EDID_LENGTH * (MAX_EDID_EXT_NUM + 1), 1053 GFP_KERNEL); 1054 if (edid == NULL) { 1055 dev_warn(&connector->dev->pdev->dev, 1056 "Failed to allocate EDID\n"); 1057 goto end; 1058 } 1059 1060 /* Read first EDID block */ 1061 ret = drm_ddc_read_edid(connector, adapter, 1062 (unsigned char *)edid, EDID_LENGTH); 1063 if (ret != 0) 1064 goto clean_up; 1065 1066 /* There are EDID extensions to be read */ 1067 if (edid->extensions != 0) { 1068 int edid_ext_num = edid->extensions; 1069 1070 if (edid_ext_num > MAX_EDID_EXT_NUM) { 1071 dev_warn(&connector->dev->pdev->dev, 1072 "The number of extension(%d) is " 1073 "over max (%d), actually read number (%d)\n", 1074 edid_ext_num, MAX_EDID_EXT_NUM, 1075 MAX_EDID_EXT_NUM); 1076 /* Reset EDID extension number to be read */ 1077 edid_ext_num = MAX_EDID_EXT_NUM; 1078 } 1079 /* Read EDID including extensions too */ 1080 ret = drm_ddc_read_edid(connector, adapter, (char *)edid, 1081 EDID_LENGTH * (edid_ext_num + 1)); 1082 if (ret != 0) 1083 goto clean_up; 1084 1085 } 1086 1087 connector->display_info.raw_edid = (char *)edid; 1088 goto end; 1089 1090 clean_up: 1091 kfree(edid); 1092 edid = NULL; 1093 end: 1094 return edid; 1095 1096 } 1097 EXPORT_SYMBOL(drm_get_edid); 1098 1099 #define HDMI_IDENTIFIER 0x000C03 1100 #define VENDOR_BLOCK 0x03 1101 /** 1102 * drm_detect_hdmi_monitor - detect whether monitor is hdmi. 1103 * @edid: monitor EDID information 1104 * 1105 * Parse the CEA extension according to CEA-861-B. 1106 * Return true if HDMI, false if not or unknown. 1107 */ 1108 bool drm_detect_hdmi_monitor(struct edid *edid) 1109 { 1110 char *edid_ext = NULL; 1111 int i, hdmi_id, edid_ext_num; 1112 int start_offset, end_offset; 1113 bool is_hdmi = false; 1114 1115 /* No EDID or EDID extensions */ 1116 if (edid == NULL || edid->extensions == 0) 1117 goto end; 1118 1119 /* Chose real EDID extension number */ 1120 edid_ext_num = edid->extensions > MAX_EDID_EXT_NUM ? 1121 MAX_EDID_EXT_NUM : edid->extensions; 1122 1123 /* Find CEA extension */ 1124 for (i = 0; i < edid_ext_num; i++) { 1125 edid_ext = (char *)edid + EDID_LENGTH * (i + 1); 1126 /* This block is CEA extension */ 1127 if (edid_ext[0] == 0x02) 1128 break; 1129 } 1130 1131 if (i == edid_ext_num) 1132 goto end; 1133 1134 /* Data block offset in CEA extension block */ 1135 start_offset = 4; 1136 end_offset = edid_ext[2]; 1137 1138 /* 1139 * Because HDMI identifier is in Vendor Specific Block, 1140 * search it from all data blocks of CEA extension. 1141 */ 1142 for (i = start_offset; i < end_offset; 1143 /* Increased by data block len */ 1144 i += ((edid_ext[i] & 0x1f) + 1)) { 1145 /* Find vendor specific block */ 1146 if ((edid_ext[i] >> 5) == VENDOR_BLOCK) { 1147 hdmi_id = edid_ext[i + 1] | (edid_ext[i + 2] << 8) | 1148 edid_ext[i + 3] << 16; 1149 /* Find HDMI identifier */ 1150 if (hdmi_id == HDMI_IDENTIFIER) 1151 is_hdmi = true; 1152 break; 1153 } 1154 } 1155 1156 end: 1157 return is_hdmi; 1158 } 1159 EXPORT_SYMBOL(drm_detect_hdmi_monitor); 1160 1161 /** 1162 * drm_add_edid_modes - add modes from EDID data, if available 1163 * @connector: connector we're probing 1164 * @edid: edid data 1165 * 1166 * Add the specified modes to the connector's mode list. 1167 * 1168 * Return number of modes added or 0 if we couldn't find any. 1169 */ 1170 int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid) 1171 { 1172 int num_modes = 0; 1173 u32 quirks; 1174 1175 if (edid == NULL) { 1176 return 0; 1177 } 1178 if (!edid_is_valid(edid)) { 1179 dev_warn(&connector->dev->pdev->dev, "%s: EDID invalid.\n", 1180 drm_get_connector_name(connector)); 1181 return 0; 1182 } 1183 1184 quirks = edid_get_quirks(edid); 1185 1186 num_modes += add_established_modes(connector, edid); 1187 num_modes += add_standard_modes(connector, edid); 1188 num_modes += add_detailed_info(connector, edid, quirks); 1189 num_modes += add_detailed_info_eedid(connector, edid, quirks); 1190 1191 if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75)) 1192 edid_fixup_preferred(connector, quirks); 1193 1194 connector->display_info.serration_vsync = (edid->input & DRM_EDID_INPUT_SERRATION_VSYNC) ? 1 : 0; 1195 connector->display_info.sync_on_green = (edid->input & DRM_EDID_INPUT_SYNC_ON_GREEN) ? 1 : 0; 1196 connector->display_info.composite_sync = (edid->input & DRM_EDID_INPUT_COMPOSITE_SYNC) ? 1 : 0; 1197 connector->display_info.separate_syncs = (edid->input & DRM_EDID_INPUT_SEPARATE_SYNCS) ? 1 : 0; 1198 connector->display_info.blank_to_black = (edid->input & DRM_EDID_INPUT_BLANK_TO_BLACK) ? 1 : 0; 1199 connector->display_info.video_level = (edid->input & DRM_EDID_INPUT_VIDEO_LEVEL) >> 5; 1200 connector->display_info.digital = (edid->input & DRM_EDID_INPUT_DIGITAL) ? 1 : 0; 1201 connector->display_info.width_mm = edid->width_cm * 10; 1202 connector->display_info.height_mm = edid->height_cm * 10; 1203 connector->display_info.gamma = edid->gamma; 1204 connector->display_info.gtf_supported = (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF) ? 1 : 0; 1205 connector->display_info.standard_color = (edid->features & DRM_EDID_FEATURE_STANDARD_COLOR) ? 1 : 0; 1206 connector->display_info.display_type = (edid->features & DRM_EDID_FEATURE_DISPLAY_TYPE) >> 3; 1207 connector->display_info.active_off_supported = (edid->features & DRM_EDID_FEATURE_PM_ACTIVE_OFF) ? 1 : 0; 1208 connector->display_info.suspend_supported = (edid->features & DRM_EDID_FEATURE_PM_SUSPEND) ? 1 : 0; 1209 connector->display_info.standby_supported = (edid->features & DRM_EDID_FEATURE_PM_STANDBY) ? 1 : 0; 1210 connector->display_info.gamma = edid->gamma; 1211 1212 return num_modes; 1213 } 1214 EXPORT_SYMBOL(drm_add_edid_modes); 1215 1216 /** 1217 * drm_add_modes_noedid - add modes for the connectors without EDID 1218 * @connector: connector we're probing 1219 * @hdisplay: the horizontal display limit 1220 * @vdisplay: the vertical display limit 1221 * 1222 * Add the specified modes to the connector's mode list. Only when the 1223 * hdisplay/vdisplay is not beyond the given limit, it will be added. 1224 * 1225 * Return number of modes added or 0 if we couldn't find any. 1226 */ 1227 int drm_add_modes_noedid(struct drm_connector *connector, 1228 int hdisplay, int vdisplay) 1229 { 1230 int i, count, num_modes = 0; 1231 struct drm_display_mode *mode, *ptr; 1232 struct drm_device *dev = connector->dev; 1233 1234 count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode); 1235 if (hdisplay < 0) 1236 hdisplay = 0; 1237 if (vdisplay < 0) 1238 vdisplay = 0; 1239 1240 for (i = 0; i < count; i++) { 1241 ptr = &drm_dmt_modes[i]; 1242 if (hdisplay && vdisplay) { 1243 /* 1244 * Only when two are valid, they will be used to check 1245 * whether the mode should be added to the mode list of 1246 * the connector. 1247 */ 1248 if (ptr->hdisplay > hdisplay || 1249 ptr->vdisplay > vdisplay) 1250 continue; 1251 } 1252 mode = drm_mode_duplicate(dev, ptr); 1253 if (mode) { 1254 drm_mode_probed_add(connector, mode); 1255 num_modes++; 1256 } 1257 } 1258 return num_modes; 1259 } 1260 EXPORT_SYMBOL(drm_add_modes_noedid); 1261