2 * Copyright (c) 2006 Luc Verhaegen (quirks list)
3 * Copyright (c) 2007-2008 Intel Corporation
4 * Jesse Barnes <jesse.barnes@intel.com>
6 * DDC probing routines (drm_ddc_read & drm_do_probe_ddc_edid) originally from
8 * Copyright (C) 2006 Dennis Munsie <dmunsie@cecropia.com>
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:
17 * The above copyright notice and this permission notice (including the
18 * next paragraph) shall be included in all copies or substantial portions
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.
29 #include <linux/kernel.h>
30 #include <linux/i2c.h>
31 #include <linux/i2c-algo-bit.h>
37 * - support EDID 1.4 (incl. CE blocks)
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).
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.
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
70 static struct edid_quirk {
74 } edid_quirk_list[] = {
76 { "ACR", 44358, EDID_QUIRK_PREFER_LARGE_60 },
78 { "API", 0x7602, EDID_QUIRK_PREFER_LARGE_60 },
80 { "ACR", 2423, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
82 /* Belinea 10 15 55 */
83 { "MAX", 1516, EDID_QUIRK_PREFER_LARGE_60 },
84 { "MAX", 0x77e, EDID_QUIRK_PREFER_LARGE_60 },
86 /* Envision Peripherals, Inc. EN-7100e */
87 { "EPI", 59264, EDID_QUIRK_135_CLOCK_TOO_HIGH },
89 /* Funai Electronics PM36B */
90 { "FCM", 13600, EDID_QUIRK_PREFER_LARGE_75 |
91 EDID_QUIRK_DETAILED_IN_CM },
93 /* LG Philips LCD LP154W01-A5 */
94 { "LPL", 0, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
95 { "LPL", 0x2a00, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
97 /* Philips 107p5 CRT */
98 { "PHL", 57364, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
101 { "PTS", 765, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
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 },
111 /* Valid EDID header has these bytes */
112 static u8 edid_header[] = { 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 };
115 * edid_is_valid - sanity check EDID data
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
122 static bool edid_is_valid(struct edid *edid)
126 u8 *raw_edid = (u8 *)edid;
128 if (memcmp(edid->header, edid_header, sizeof(edid_header)))
130 if (edid->version != 1) {
131 DRM_ERROR("EDID has major version %d, instead of 1\n", edid->version);
134 if (edid->revision > 4)
135 DRM_DEBUG("EDID minor > 4, assuming backward compatibility\n");
137 for (i = 0; i < EDID_LENGTH; i++)
140 DRM_ERROR("EDID checksum is invalid, remainder is %d\n", csum);
148 DRM_ERROR("Raw EDID:\n");
149 print_hex_dump_bytes(KERN_ERR, DUMP_PREFIX_NONE, raw_edid, EDID_LENGTH);
156 * edid_vendor - match a string against EDID's obfuscated vendor field
157 * @edid: EDID to match
158 * @vendor: vendor string
160 * Returns true if @vendor is in @edid, false otherwise
162 static bool edid_vendor(struct edid *edid, char *vendor)
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) + '@';
171 return !strncmp(edid_vendor, vendor, 3);
175 * edid_get_quirks - return quirk flags for a given EDID
176 * @edid: EDID to process
178 * This tells subsequent routines what fixes they need to apply.
180 static u32 edid_get_quirks(struct edid *edid)
182 struct edid_quirk *quirk;
185 for (i = 0; i < ARRAY_SIZE(edid_quirk_list); i++) {
186 quirk = &edid_quirk_list[i];
188 if (edid_vendor(edid, quirk->vendor) &&
189 (EDID_PRODUCT_ID(edid) == quirk->product_id))
190 return quirk->quirks;
196 #define MODE_SIZE(m) ((m)->hdisplay * (m)->vdisplay)
197 #define MODE_REFRESH_DIFF(m,r) (abs((m)->vrefresh - target_refresh))
201 * edid_fixup_preferred - set preferred modes based on quirk list
202 * @connector: has mode list to fix up
203 * @quirks: quirks list
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.
208 static void edid_fixup_preferred(struct drm_connector *connector,
211 struct drm_display_mode *t, *cur_mode, *preferred_mode;
212 int target_refresh = 0;
214 if (list_empty(&connector->probed_modes))
217 if (quirks & EDID_QUIRK_PREFER_LARGE_60)
219 if (quirks & EDID_QUIRK_PREFER_LARGE_75)
222 preferred_mode = list_first_entry(&connector->probed_modes,
223 struct drm_display_mode, head);
225 list_for_each_entry_safe(cur_mode, t, &connector->probed_modes, head) {
226 cur_mode->type &= ~DRM_MODE_TYPE_PREFERRED;
228 if (cur_mode == preferred_mode)
231 /* Largest mode is preferred */
232 if (MODE_SIZE(cur_mode) > MODE_SIZE(preferred_mode))
233 preferred_mode = cur_mode;
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;
243 preferred_mode->type |= DRM_MODE_TYPE_PREFERRED;
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.
251 static struct drm_display_mode drm_dmt_modes[] = {
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
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) },
483 static struct drm_display_mode *drm_find_dmt(struct drm_device *dev,
484 int hsize, int vsize, int fresh)
487 struct drm_display_mode *ptr, *mode;
489 count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
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);
504 * drm_mode_std - convert standard mode info (width, height, refresh) into mode
505 * @t: standard timing params
506 * @timing_level: standard timing level
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.
511 * Punts for now, but should eventually use the FB layer's CVT based mode
514 struct drm_display_mode *drm_mode_std(struct drm_device *dev,
515 struct std_timing *t,
518 struct drm_display_mode *mode;
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;
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;
538 vsize = (hsize * 9) / 16;
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;
548 /* check whether it can be found in default mode table */
549 mode = drm_find_dmt(dev, hsize, vsize, vrefresh_rate);
553 switch (timing_level) {
557 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
560 mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
567 * drm_mode_detailed - create a new mode from an EDID detailed timing section
568 * @dev: DRM device (needed to create new mode)
570 * @timing: EDID detailed timing info
571 * @quirks: quirks to apply
573 * An EDID detailed timing block contains enough info for us to create and
574 * return a new struct drm_display_mode.
576 static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev,
578 struct detailed_timing *timing,
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);
592 /* ignore tiny modes */
593 if (hactive < 64 || vactive < 64)
596 if (pt->misc & DRM_EDID_PT_STEREO) {
597 printk(KERN_WARNING "stereo mode not supported\n");
600 if (!(pt->misc & DRM_EDID_PT_SEPARATE_SYNC)) {
601 printk(KERN_WARNING "integrated sync not supported\n");
605 mode = drm_mode_create(dev);
609 mode->type = DRM_MODE_TYPE_DRIVER;
611 if (quirks & EDID_QUIRK_135_CLOCK_TOO_HIGH)
612 timing->pixel_clock = cpu_to_le16(1088);
614 mode->clock = le16_to_cpu(timing->pixel_clock) * 10;
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;
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;
626 drm_mode_set_name(mode);
628 if (pt->misc & DRM_EDID_PT_INTERLACED)
629 mode->flags |= DRM_MODE_FLAG_INTERLACE;
631 if (quirks & EDID_QUIRK_DETAILED_SYNC_PP) {
632 pt->misc |= DRM_EDID_PT_HSYNC_POSITIVE | DRM_EDID_PT_VSYNC_POSITIVE;
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;
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;
643 if (quirks & EDID_QUIRK_DETAILED_IN_CM) {
644 mode->width_mm *= 10;
645 mode->height_mm *= 10;
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;
657 * Detailed mode info for the EDID "established modes" data to use.
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 */
713 #define EDID_EST_TIMINGS 16
714 #define EDID_STD_TIMINGS 8
715 #define EDID_DETAILED_TIMINGS 4
718 * add_established_modes - get est. modes from EDID and add them
719 * @edid: EDID block to scan
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.
724 static int add_established_modes(struct drm_connector *connector, struct edid *edid)
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);
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]);
737 drm_mode_probed_add(connector, newmode);
745 * stanard_timing_level - get std. timing level(CVT/GTF/DMT)
746 * @edid: EDID block to scan
748 static int standard_timing_level(struct edid *edid)
750 if (edid->revision >= 2) {
751 if (edid->revision >= 4 && (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF))
759 * add_standard_modes - get std. modes from EDID and add them
760 * @edid: EDID block to scan
762 * Standard modes can be calculated using the CVT standard. Grab them from
763 * @edid, calculate them, and add them to the list.
765 static int add_standard_modes(struct drm_connector *connector, struct edid *edid)
767 struct drm_device *dev = connector->dev;
771 timing_level = standard_timing_level(edid);
773 for (i = 0; i < EDID_STD_TIMINGS; i++) {
774 struct std_timing *t = &edid->standard_timings[i];
775 struct drm_display_mode *newmode;
777 /* If std timings bytes are 1, 1 it's empty */
778 if (t->hsize == 1 && t->vfreq_aspect == 1)
781 newmode = drm_mode_std(dev, &edid->standard_timings[i],
784 drm_mode_probed_add(connector, newmode);
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
798 * Some of the detailed timing sections may contain mode information. Grab
799 * it and add it to the list.
801 static int add_detailed_info(struct drm_connector *connector,
802 struct edid *edid, u32 quirks)
804 struct drm_device *dev = connector->dev;
808 timing_level = standard_timing_level(edid);
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;
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:
822 case EDID_DETAIL_MONITOR_STRING:
824 case EDID_DETAIL_MONITOR_RANGE:
825 /* Get monitor range data */
827 case EDID_DETAIL_MONITOR_NAME:
829 case EDID_DETAIL_MONITOR_CPDATA:
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;
837 std = &data->data.timings[j];
838 newmode = drm_mode_std(dev, std,
841 drm_mode_probed_add(connector, newmode);
850 newmode = drm_mode_detailed(dev, edid, timing, quirks);
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);
866 * add_detailed_mode_eedid - get detailed mode info from addtional timing
868 * @connector: attached connector
869 * @edid: EDID block to scan(It is only to get addtional timing EDID block)
870 * @quirks: quirks to apply
872 * Some of the detailed timing sections may contain mode information. Grab
873 * it and add it to the list.
875 static int add_detailed_info_eedid(struct drm_connector *connector,
876 struct edid *edid, u32 quirks)
878 struct drm_device *dev = connector->dev;
880 char *edid_ext = NULL;
881 struct detailed_timing *timing;
882 struct detailed_non_pixel *data;
883 struct drm_display_mode *newmode;
885 int start_offset, end_offset;
888 if (edid->version == 1 && edid->revision < 3) {
889 /* If the EDID version is less than 1.3, there is no
894 if (!edid->extensions) {
895 /* if there is no extension EDID, it is unnecessary to
896 * parse the E-EDID to get detailed info
901 /* Chose real EDID extension number */
902 edid_ext_num = edid->extensions > MAX_EDID_EXT_NUM ?
903 MAX_EDID_EXT_NUM : edid->extensions;
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)
913 if (i == edid_ext_num) {
914 /* if there is no additional timing EDID block, return */
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.
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);
941 drm_mode_probed_add(connector, newmode);
947 /* Other timing or info */
948 switch (data->type) {
949 case EDID_DETAIL_MONITOR_SERIAL:
951 case EDID_DETAIL_MONITOR_STRING:
953 case EDID_DETAIL_MONITOR_RANGE:
954 /* Get monitor range data */
956 case EDID_DETAIL_MONITOR_NAME:
958 case EDID_DETAIL_MONITOR_CPDATA:
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;
966 std = &data->data.timings[j];
967 newmode = drm_mode_std(dev, std, timing_level);
969 drm_mode_probed_add(connector, newmode);
982 #define DDC_ADDR 0x50
984 * Get EDID information via I2C.
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.
991 * Try to fetch EDID information by calling i2c driver function.
993 int drm_do_probe_ddc_edid(struct i2c_adapter *adapter,
994 unsigned char *buf, int len)
996 unsigned char start = 0x0;
997 struct i2c_msg msgs[] = {
1011 if (i2c_transfer(adapter, msgs, 2) == 2)
1016 EXPORT_SYMBOL(drm_do_probe_ddc_edid);
1018 static int drm_ddc_read_edid(struct drm_connector *connector,
1019 struct i2c_adapter *adapter,
1024 ret = drm_do_probe_ddc_edid(adapter, buf, len);
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));
1038 * drm_get_edid - get EDID data, if available
1039 * @connector: connector we're probing
1040 * @adapter: i2c adapter to use for DDC
1042 * Poke the given connector's i2c channel to grab EDID data if possible.
1044 * Return edid data or NULL if we couldn't find any.
1046 struct edid *drm_get_edid(struct drm_connector *connector,
1047 struct i2c_adapter *adapter)
1052 edid = kmalloc(EDID_LENGTH * (MAX_EDID_EXT_NUM + 1),
1055 dev_warn(&connector->dev->pdev->dev,
1056 "Failed to allocate EDID\n");
1060 /* Read first EDID block */
1061 ret = drm_ddc_read_edid(connector, adapter,
1062 (unsigned char *)edid, EDID_LENGTH);
1066 /* There are EDID extensions to be read */
1067 if (edid->extensions != 0) {
1068 int edid_ext_num = edid->extensions;
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,
1076 /* Reset EDID extension number to be read */
1077 edid_ext_num = MAX_EDID_EXT_NUM;
1079 /* Read EDID including extensions too */
1080 ret = drm_ddc_read_edid(connector, adapter, (char *)edid,
1081 EDID_LENGTH * (edid_ext_num + 1));
1087 connector->display_info.raw_edid = (char *)edid;
1097 EXPORT_SYMBOL(drm_get_edid);
1099 #define HDMI_IDENTIFIER 0x000C03
1100 #define VENDOR_BLOCK 0x03
1102 * drm_detect_hdmi_monitor - detect whether monitor is hdmi.
1103 * @edid: monitor EDID information
1105 * Parse the CEA extension according to CEA-861-B.
1106 * Return true if HDMI, false if not or unknown.
1108 bool drm_detect_hdmi_monitor(struct edid *edid)
1110 char *edid_ext = NULL;
1111 int i, hdmi_id, edid_ext_num;
1112 int start_offset, end_offset;
1113 bool is_hdmi = false;
1115 /* No EDID or EDID extensions */
1116 if (edid == NULL || edid->extensions == 0)
1119 /* Chose real EDID extension number */
1120 edid_ext_num = edid->extensions > MAX_EDID_EXT_NUM ?
1121 MAX_EDID_EXT_NUM : edid->extensions;
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)
1131 if (i == edid_ext_num)
1134 /* Data block offset in CEA extension block */
1136 end_offset = edid_ext[2];
1139 * Because HDMI identifier is in Vendor Specific Block,
1140 * search it from all data blocks of CEA extension.
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)
1159 EXPORT_SYMBOL(drm_detect_hdmi_monitor);
1162 * drm_add_edid_modes - add modes from EDID data, if available
1163 * @connector: connector we're probing
1166 * Add the specified modes to the connector's mode list.
1168 * Return number of modes added or 0 if we couldn't find any.
1170 int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid)
1178 if (!edid_is_valid(edid)) {
1179 dev_warn(&connector->dev->pdev->dev, "%s: EDID invalid.\n",
1180 drm_get_connector_name(connector));
1184 quirks = edid_get_quirks(edid);
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);
1191 if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75))
1192 edid_fixup_preferred(connector, quirks);
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;
1214 EXPORT_SYMBOL(drm_add_edid_modes);
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
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.
1225 * Return number of modes added or 0 if we couldn't find any.
1227 int drm_add_modes_noedid(struct drm_connector *connector,
1228 int hdisplay, int vdisplay)
1230 int i, count, num_modes = 0;
1231 struct drm_display_mode *mode, *ptr;
1232 struct drm_device *dev = connector->dev;
1234 count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
1240 for (i = 0; i < count; i++) {
1241 ptr = &drm_dmt_modes[i];
1242 if (hdisplay && vdisplay) {
1244 * Only when two are valid, they will be used to check
1245 * whether the mode should be added to the mode list of
1248 if (ptr->hdisplay > hdisplay ||
1249 ptr->vdisplay > vdisplay)
1252 mode = drm_mode_duplicate(dev, ptr);
1254 drm_mode_probed_add(connector, mode);
1260 EXPORT_SYMBOL(drm_add_modes_noedid);