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drm/edid: Ignore bad standard timings.
[deliverable/linux.git] / drivers / gpu / drm / drm_edid.c
CommitLineData
f453ba04
DA		 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)
882f0219
ZY		 63/* define the number of Extension EDID block */
64#define MAX_EDID_EXT_NUM 4
f453ba04 65
5c61259e
ZY		 66#define LEVEL_DMT 0
67#define LEVEL_GTF 1
68#define LEVEL_CVT 2
69
f453ba04
DA		 70static 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 */
083ae056
AJ		 112static const u8 edid_header[] = {
113 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00
114};
f453ba04
DA		 115
116/**
117 * edid_is_valid - sanity check EDID data
118 * @edid: EDID data
119 *
120 * Sanity check the EDID block by looking at the header, the version number
121 * and the checksum. Return 0 if the EDID doesn't check out, or 1 if it's
122 * valid.
123 */
124static bool edid_is_valid(struct edid *edid)
125{
126 int i;
127 u8 csum = 0;
128 u8 *raw_edid = (u8 *)edid;
129
130 if (memcmp(edid->header, edid_header, sizeof(edid_header)))
131 goto bad;
132 if (edid->version != 1) {
133 DRM_ERROR("EDID has major version %d, instead of 1\n", edid->version);
134 goto bad;
135 }
b94ee652
JB		 136 if (edid->revision > 4)
137 DRM_DEBUG("EDID minor > 4, assuming backward compatibility\n");
f453ba04
DA		 138
139 for (i = 0; i < EDID_LENGTH; i++)
140 csum += raw_edid[i];
141 if (csum) {
142 DRM_ERROR("EDID checksum is invalid, remainder is %d\n", csum);
143 goto bad;
144 }
145
146 return 1;
147
148bad:
149 if (raw_edid) {
150 DRM_ERROR("Raw EDID:\n");
151 print_hex_dump_bytes(KERN_ERR, DUMP_PREFIX_NONE, raw_edid, EDID_LENGTH);
152 printk("\n");
153 }
154 return 0;
155}
156
157/**
158 * edid_vendor - match a string against EDID's obfuscated vendor field
159 * @edid: EDID to match
160 * @vendor: vendor string
161 *
162 * Returns true if @vendor is in @edid, false otherwise
163 */
164static bool edid_vendor(struct edid *edid, char *vendor)
165{
166 char edid_vendor[3];
167
168 edid_vendor[0] = ((edid->mfg_id[0] & 0x7c) >> 2) + '@';
169 edid_vendor[1] = (((edid->mfg_id[0] & 0x3) << 3) |
170 ((edid->mfg_id[1] & 0xe0) >> 5)) + '@';
16456c87 171 edid_vendor[2] = (edid->mfg_id[1] & 0x1f) + '@';
f453ba04
DA		 172
173 return !strncmp(edid_vendor, vendor, 3);
174}
175
176/**
177 * edid_get_quirks - return quirk flags for a given EDID
178 * @edid: EDID to process
179 *
180 * This tells subsequent routines what fixes they need to apply.
181 */
182static u32 edid_get_quirks(struct edid *edid)
183{
184 struct edid_quirk *quirk;
185 int i;
186
187 for (i = 0; i < ARRAY_SIZE(edid_quirk_list); i++) {
188 quirk = &edid_quirk_list[i];
189
190 if (edid_vendor(edid, quirk->vendor) &&
191 (EDID_PRODUCT_ID(edid) == quirk->product_id))
192 return quirk->quirks;
193 }
194
195 return 0;
196}
197
198#define MODE_SIZE(m) ((m)->hdisplay * (m)->vdisplay)
199#define MODE_REFRESH_DIFF(m,r) (abs((m)->vrefresh - target_refresh))
200
201
202/**
203 * edid_fixup_preferred - set preferred modes based on quirk list
204 * @connector: has mode list to fix up
205 * @quirks: quirks list
206 *
207 * Walk the mode list for @connector, clearing the preferred status
208 * on existing modes and setting it anew for the right mode ala @quirks.
209 */
210static void edid_fixup_preferred(struct drm_connector *connector,
211 u32 quirks)
212{
213 struct drm_display_mode *t, *cur_mode, *preferred_mode;
f890607b 214 int target_refresh = 0;
f453ba04
DA		 215
216 if (list_empty(&connector->probed_modes))
217 return;
218
219 if (quirks & EDID_QUIRK_PREFER_LARGE_60)
220 target_refresh = 60;
221 if (quirks & EDID_QUIRK_PREFER_LARGE_75)
222 target_refresh = 75;
223
224 preferred_mode = list_first_entry(&connector->probed_modes,
225 struct drm_display_mode, head);
226
227 list_for_each_entry_safe(cur_mode, t, &connector->probed_modes, head) {
228 cur_mode->type &= ~DRM_MODE_TYPE_PREFERRED;
229
230 if (cur_mode == preferred_mode)
231 continue;
232
233 /* Largest mode is preferred */
234 if (MODE_SIZE(cur_mode) > MODE_SIZE(preferred_mode))
235 preferred_mode = cur_mode;
236
237 /* At a given size, try to get closest to target refresh */
238 if ((MODE_SIZE(cur_mode) == MODE_SIZE(preferred_mode)) &&
239 MODE_REFRESH_DIFF(cur_mode, target_refresh) <
240 MODE_REFRESH_DIFF(preferred_mode, target_refresh)) {
241 preferred_mode = cur_mode;
242 }
243 }
244
245 preferred_mode->type |= DRM_MODE_TYPE_PREFERRED;
246}
247
aa9eaa1f
ZY		 248/*
249 * Add the Autogenerated from the DMT spec.
250 * This table is copied from xfree86/modes/xf86EdidModes.c.
251 * But the mode with Reduced blank feature is deleted.
252 */
253static struct drm_display_mode drm_dmt_modes[] = {
254 /* 640x350@85Hz */
255 { DRM_MODE("640x350", DRM_MODE_TYPE_DRIVER, 31500, 640, 672,
256 736, 832, 0, 350, 382, 385, 445, 0,
257 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC) },
258 /* 640x400@85Hz */
259 { DRM_MODE("640x400", DRM_MODE_TYPE_DRIVER, 31500, 640, 672,
260 736, 832, 0, 400, 401, 404, 445, 0,
261 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
262 /* 720x400@85Hz */
263 { DRM_MODE("720x400", DRM_MODE_TYPE_DRIVER, 35500, 720, 756,
264 828, 936, 0, 400, 401, 404, 446, 0,
265 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
266 /* 640x480@60Hz */
267 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 25175, 640, 656,
268 752, 800, 0, 480, 489, 492, 525, 0,
269 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
270 /* 640x480@72Hz */
271 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 664,
272 704, 832, 0, 480, 489, 492, 520, 0,
273 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
274 /* 640x480@75Hz */
275 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 656,
276 720, 840, 0, 480, 481, 484, 500, 0,
277 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
278 /* 640x480@85Hz */
279 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 36000, 640, 696,
280 752, 832, 0, 480, 481, 484, 509, 0,
281 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
282 /* 800x600@56Hz */
283 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 36000, 800, 824,
284 896, 1024, 0, 600, 601, 603, 625, 0,
285 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
286 /* 800x600@60Hz */
287 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 40000, 800, 840,
288 968, 1056, 0, 600, 601, 605, 628, 0,
289 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
290 /* 800x600@72Hz */
291 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 50000, 800, 856,
292 976, 1040, 0, 600, 637, 643, 666, 0,
293 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
294 /* 800x600@75Hz */
295 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 49500, 800, 816,
296 896, 1056, 0, 600, 601, 604, 625, 0,
297 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
298 /* 800x600@85Hz */
299 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 56250, 800, 832,
300 896, 1048, 0, 600, 601, 604, 631, 0,
301 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
302 /* 848x480@60Hz */
303 { DRM_MODE("848x480", DRM_MODE_TYPE_DRIVER, 33750, 848, 864,
304 976, 1088, 0, 480, 486, 494, 517, 0,
305 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
306 /* 1024x768@43Hz, interlace */
307 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 44900, 1024, 1032,
308 1208, 1264, 0, 768, 768, 772, 817, 0,
309 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC |
310 DRM_MODE_FLAG_INTERLACE) },
311 /* 1024x768@60Hz */
312 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 65000, 1024, 1048,
313 1184, 1344, 0, 768, 771, 777, 806, 0,
314 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
315 /* 1024x768@70Hz */
316 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 75000, 1024, 1048,
317 1184, 1328, 0, 768, 771, 777, 806, 0,
318 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
319 /* 1024x768@75Hz */
320 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 78750, 1024, 1040,
321 1136, 1312, 0, 768, 769, 772, 800, 0,
322 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
323 /* 1024x768@85Hz */
324 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 94500, 1024, 1072,
325 1072, 1376, 0, 768, 769, 772, 808, 0,
326 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
327 /* 1152x864@75Hz */
328 { DRM_MODE("1152x864", DRM_MODE_TYPE_DRIVER, 108000, 1152, 1216,
329 1344, 1600, 0, 864, 865, 868, 900, 0,
330 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
331 /* 1280x768@60Hz */
332 { DRM_MODE("1280x768", DRM_MODE_TYPE_DRIVER, 79500, 1280, 1344,
333 1472, 1664, 0, 768, 771, 778, 798, 0,
334 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
335 /* 1280x768@75Hz */
336 { DRM_MODE("1280x768", DRM_MODE_TYPE_DRIVER, 102250, 1280, 1360,
337 1488, 1696, 0, 768, 771, 778, 805, 0,
338 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC) },
339 /* 1280x768@85Hz */
340 { DRM_MODE("1280x768", DRM_MODE_TYPE_DRIVER, 117500, 1280, 1360,
341 1496, 1712, 0, 768, 771, 778, 809, 0,
342 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
343 /* 1280x800@60Hz */
344 { DRM_MODE("1280x800", DRM_MODE_TYPE_DRIVER, 83500, 1280, 1352,
345 1480, 1680, 0, 800, 803, 809, 831, 0,
346 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC) },
347 /* 1280x800@75Hz */
348 { DRM_MODE("1280x800", DRM_MODE_TYPE_DRIVER, 106500, 1280, 1360,
349 1488, 1696, 0, 800, 803, 809, 838, 0,
350 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
351 /* 1280x800@85Hz */
352 { DRM_MODE("1280x800", DRM_MODE_TYPE_DRIVER, 122500, 1280, 1360,
353 1496, 1712, 0, 800, 803, 809, 843, 0,
354 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
355 /* 1280x960@60Hz */
356 { DRM_MODE("1280x960", DRM_MODE_TYPE_DRIVER, 108000, 1280, 1376,
357 1488, 1800, 0, 960, 961, 964, 1000, 0,
358 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
359 /* 1280x960@85Hz */
360 { DRM_MODE("1280x960", DRM_MODE_TYPE_DRIVER, 148500, 1280, 1344,
361 1504, 1728, 0, 960, 961, 964, 1011, 0,
362 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
363 /* 1280x1024@60Hz */
364 { DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 108000, 1280, 1328,
365 1440, 1688, 0, 1024, 1025, 1028, 1066, 0,
366 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
367 /* 1280x1024@75Hz */
368 { DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 135000, 1280, 1296,
369 1440, 1688, 0, 1024, 1025, 1028, 1066, 0,
370 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
371 /* 1280x1024@85Hz */
372 { DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 157500, 1280, 1344,
373 1504, 1728, 0, 1024, 1025, 1028, 1072, 0,
374 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
375 /* 1360x768@60Hz */
376 { DRM_MODE("1360x768", DRM_MODE_TYPE_DRIVER, 85500, 1360, 1424,
377 1536, 1792, 0, 768, 771, 777, 795, 0,
378 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
379 /* 1440x1050@60Hz */
380 { DRM_MODE("1400x1050", DRM_MODE_TYPE_DRIVER, 121750, 1400, 1488,
381 1632, 1864, 0, 1050, 1053, 1057, 1089, 0,
382 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
383 /* 1440x1050@75Hz */
384 { DRM_MODE("1400x1050", DRM_MODE_TYPE_DRIVER, 156000, 1400, 1504,
385 1648, 1896, 0, 1050, 1053, 1057, 1099, 0,
386 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
387 /* 1440x1050@85Hz */
388 { DRM_MODE("1400x1050", DRM_MODE_TYPE_DRIVER, 179500, 1400, 1504,
389 1656, 1912, 0, 1050, 1053, 1057, 1105, 0,
390 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
391 /* 1440x900@60Hz */
392 { DRM_MODE("1440x900", DRM_MODE_TYPE_DRIVER, 106500, 1440, 1520,
393 1672, 1904, 0, 900, 903, 909, 934, 0,
394 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
395 /* 1440x900@75Hz */
396 { DRM_MODE("1440x900", DRM_MODE_TYPE_DRIVER, 136750, 1440, 1536,
397 1688, 1936, 0, 900, 903, 909, 942, 0,
398 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
399 /* 1440x900@85Hz */
400 { DRM_MODE("1440x900", DRM_MODE_TYPE_DRIVER, 157000, 1440, 1544,
401 1696, 1952, 0, 900, 903, 909, 948, 0,
402 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
403 /* 1600x1200@60Hz */
404 { DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 162000, 1600, 1664,
405 1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
406 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
407 /* 1600x1200@65Hz */
408 { DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 175500, 1600, 1664,
409 1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
410 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
411 /* 1600x1200@70Hz */
412 { DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 189000, 1600, 1664,
413 1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
414 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
415 /* 1600x1200@75Hz */
416 { DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 2025000, 1600, 1664,
417 1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
418 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
419 /* 1600x1200@85Hz */
420 { DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 229500, 1600, 1664,
421 1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
422 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
423 /* 1680x1050@60Hz */
424 { DRM_MODE("1680x1050", DRM_MODE_TYPE_DRIVER, 146250, 1680, 1784,
425 1960, 2240, 0, 1050, 1053, 1059, 1089, 0,
426 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
427 /* 1680x1050@75Hz */
428 { DRM_MODE("1680x1050", DRM_MODE_TYPE_DRIVER, 187000, 1680, 1800,
429 1976, 2272, 0, 1050, 1053, 1059, 1099, 0,
430 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
431 /* 1680x1050@85Hz */
432 { DRM_MODE("1680x1050", DRM_MODE_TYPE_DRIVER, 214750, 1680, 1808,
433 1984, 2288, 0, 1050, 1053, 1059, 1105, 0,
434 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
435 /* 1792x1344@60Hz */
436 { DRM_MODE("1792x1344", DRM_MODE_TYPE_DRIVER, 204750, 1792, 1920,
437 2120, 2448, 0, 1344, 1345, 1348, 1394, 0,
438 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
439 /* 1729x1344@75Hz */
440 { DRM_MODE("1792x1344", DRM_MODE_TYPE_DRIVER, 261000, 1792, 1888,
441 2104, 2456, 0, 1344, 1345, 1348, 1417, 0,
442 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
443 /* 1853x1392@60Hz */
444 { DRM_MODE("1856x1392", DRM_MODE_TYPE_DRIVER, 218250, 1856, 1952,
445 2176, 2528, 0, 1392, 1393, 1396, 1439, 0,
446 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
447 /* 1856x1392@75Hz */
448 { DRM_MODE("1856x1392", DRM_MODE_TYPE_DRIVER, 288000, 1856, 1984,
449 2208, 2560, 0, 1392, 1395, 1399, 1500, 0,
450 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
451 /* 1920x1200@60Hz */
452 { DRM_MODE("1920x1200", DRM_MODE_TYPE_DRIVER, 193250, 1920, 2056,
453 2256, 2592, 0, 1200, 1203, 1209, 1245, 0,
454 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
455 /* 1920x1200@75Hz */
456 { DRM_MODE("1920x1200", DRM_MODE_TYPE_DRIVER, 245250, 1920, 2056,
457 2264, 2608, 0, 1200, 1203, 1209, 1255, 0,
458 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
459 /* 1920x1200@85Hz */
460 { DRM_MODE("1920x1200", DRM_MODE_TYPE_DRIVER, 281250, 1920, 2064,
461 2272, 2624, 0, 1200, 1203, 1209, 1262, 0,
462 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
463 /* 1920x1440@60Hz */
464 { DRM_MODE("1920x1440", DRM_MODE_TYPE_DRIVER, 234000, 1920, 2048,
465 2256, 2600, 0, 1440, 1441, 1444, 1500, 0,
466 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
467 /* 1920x1440@75Hz */
468 { DRM_MODE("1920x1440", DRM_MODE_TYPE_DRIVER, 297000, 1920, 2064,
469 2288, 2640, 0, 1440, 1441, 1444, 1500, 0,
470 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
471 /* 2560x1600@60Hz */
472 { DRM_MODE("2560x1600", DRM_MODE_TYPE_DRIVER, 348500, 2560, 2752,
473 3032, 3504, 0, 1600, 1603, 1609, 1658, 0,
474 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
475 /* 2560x1600@75HZ */
476 { DRM_MODE("2560x1600", DRM_MODE_TYPE_DRIVER, 443250, 2560, 2768,
477 3048, 3536, 0, 1600, 1603, 1609, 1672, 0,
478 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
479 /* 2560x1600@85HZ */
480 { DRM_MODE("2560x1600", DRM_MODE_TYPE_DRIVER, 505250, 2560, 2768,
481 3048, 3536, 0, 1600, 1603, 1609, 1682, 0,
482 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
483};
484
559ee21d
ZY		 485static struct drm_display_mode *drm_find_dmt(struct drm_device *dev,
486 int hsize, int vsize, int fresh)
487{
488 int i, count;
489 struct drm_display_mode *ptr, *mode;
490
491 count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
492 mode = NULL;
493 for (i = 0; i < count; i++) {
494 ptr = &drm_dmt_modes[i];
495 if (hsize == ptr->hdisplay &&
496 vsize == ptr->vdisplay &&
497 fresh == drm_mode_vrefresh(ptr)) {
498 /* get the expected default mode */
499 mode = drm_mode_duplicate(dev, ptr);
500 break;
501 }
502 }
503 return mode;
504}
23425cae
AJ		 505
506/*
507 * 0 is reserved. The spec says 0x01 fill for unused timings. Some old
508 * monitors fill with ascii space (0x20) instead.
509 */
510static int
511bad_std_timing(u8 a, u8 b)
512{
513 return (a == 0x00 && b == 0x00) ||
514 (a == 0x01 && b == 0x01) ||
515 (a == 0x20 && b == 0x20);
516}
517
f453ba04
DA		 518/**
519 * drm_mode_std - convert standard mode info (width, height, refresh) into mode
520 * @t: standard timing params
5c61259e 521 * @timing_level: standard timing level
f453ba04
DA		 522 *
523 * Take the standard timing params (in this case width, aspect, and refresh)
5c61259e 524 * and convert them into a real mode using CVT/GTF/DMT.
f453ba04
DA		 525 *
526 * Punts for now, but should eventually use the FB layer's CVT based mode
527 * generation code.
528 */
529struct drm_display_mode *drm_mode_std(struct drm_device *dev,
5c61259e
ZY		 530 struct std_timing *t,
531 int timing_level)
f453ba04
DA		 532{
533 struct drm_display_mode *mode;
5c61259e
ZY		 534 int hsize, vsize;
535 int vrefresh_rate;
0454beab
MD		 536 unsigned aspect_ratio = (t->vfreq_aspect & EDID_TIMING_ASPECT_MASK)
537 >> EDID_TIMING_ASPECT_SHIFT;
5c61259e
ZY		 538 unsigned vfreq = (t->vfreq_aspect & EDID_TIMING_VFREQ_MASK)
539 >> EDID_TIMING_VFREQ_SHIFT;
540
23425cae
AJ		 541 if (bad_std_timing(t->hsize, t->vfreq_aspect))
542 return NULL;
543
5c61259e
ZY		 544 /* According to the EDID spec, the hdisplay = hsize * 8 + 248 */
545 hsize = t->hsize * 8 + 248;
546 /* vrefresh_rate = vfreq + 60 */
547 vrefresh_rate = vfreq + 60;
548 /* the vdisplay is calculated based on the aspect ratio */
0454beab 549 if (aspect_ratio == 0)
f453ba04 550 vsize = (hsize * 10) / 16;
0454beab 551 else if (aspect_ratio == 1)
f453ba04 552 vsize = (hsize * 3) / 4;
0454beab 553 else if (aspect_ratio == 2)
f453ba04
DA		 554 vsize = (hsize * 4) / 5;
555 else
556 vsize = (hsize * 9) / 16;
559ee21d
ZY		 557 /* HDTV hack */
558 if (hsize == 1360 && vsize == 765 && vrefresh_rate == 60) {
559 mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
560 mode->hdisplay = 1366;
561 mode->vsync_start = mode->vsync_start - 1;
562 mode->vsync_end = mode->vsync_end - 1;
563 return mode;
564 }
5c61259e 565 mode = NULL;
559ee21d
ZY		 566 /* check whether it can be found in default mode table */
567 mode = drm_find_dmt(dev, hsize, vsize, vrefresh_rate);
568 if (mode)
569 return mode;
570
5c61259e
ZY		 571 switch (timing_level) {
572 case LEVEL_DMT:
5c61259e
ZY		 573 break;
574 case LEVEL_GTF:
575 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
576 break;
577 case LEVEL_CVT:
578 mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
579 break;
580 }
f453ba04
DA		 581 return mode;
582}
583
584/**
585 * drm_mode_detailed - create a new mode from an EDID detailed timing section
586 * @dev: DRM device (needed to create new mode)
587 * @edid: EDID block
588 * @timing: EDID detailed timing info
589 * @quirks: quirks to apply
590 *
591 * An EDID detailed timing block contains enough info for us to create and
592 * return a new struct drm_display_mode.
593 */
594static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev,
595 struct edid *edid,
596 struct detailed_timing *timing,
597 u32 quirks)
598{
599 struct drm_display_mode *mode;
600 struct detailed_pixel_timing *pt = &timing->data.pixel_data;
0454beab
MD		 601 unsigned hactive = (pt->hactive_hblank_hi & 0xf0) << 4 | pt->hactive_lo;
602 unsigned vactive = (pt->vactive_vblank_hi & 0xf0) << 4 | pt->vactive_lo;
603 unsigned hblank = (pt->hactive_hblank_hi & 0xf) << 8 | pt->hblank_lo;
604 unsigned vblank = (pt->vactive_vblank_hi & 0xf) << 8 | pt->vblank_lo;
e14cbee4
MD		 605 unsigned hsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc0) << 2 | pt->hsync_offset_lo;
606 unsigned hsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x30) << 4 | pt->hsync_pulse_width_lo;
607 unsigned vsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc) >> 2 | pt->vsync_offset_pulse_width_lo >> 4;
608 unsigned vsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x3) << 4 | (pt->vsync_offset_pulse_width_lo & 0xf);
f453ba04 609
fc438966 610 /* ignore tiny modes */
0454beab 611 if (hactive < 64 || vactive < 64)
fc438966
AJ		 612 return NULL;
613
0454beab 614 if (pt->misc & DRM_EDID_PT_STEREO) {
f453ba04
DA		 615 printk(KERN_WARNING "stereo mode not supported\n");
616 return NULL;
617 }
0454beab 618 if (!(pt->misc & DRM_EDID_PT_SEPARATE_SYNC)) {
f453ba04
DA		 619 printk(KERN_WARNING "integrated sync not supported\n");
620 return NULL;
621 }
622
623 mode = drm_mode_create(dev);
624 if (!mode)
625 return NULL;
626
627 mode->type = DRM_MODE_TYPE_DRIVER;
628
629 if (quirks & EDID_QUIRK_135_CLOCK_TOO_HIGH)
0454beab
MD		 630 timing->pixel_clock = cpu_to_le16(1088);
631
632 mode->clock = le16_to_cpu(timing->pixel_clock) * 10;
633
634 mode->hdisplay = hactive;
635 mode->hsync_start = mode->hdisplay + hsync_offset;
636 mode->hsync_end = mode->hsync_start + hsync_pulse_width;
637 mode->htotal = mode->hdisplay + hblank;
638
639 mode->vdisplay = vactive;
640 mode->vsync_start = mode->vdisplay + vsync_offset;
641 mode->vsync_end = mode->vsync_start + vsync_pulse_width;
642 mode->vtotal = mode->vdisplay + vblank;
f453ba04
DA		 643
644 drm_mode_set_name(mode);
645
0454beab 646 if (pt->misc & DRM_EDID_PT_INTERLACED)
f453ba04
DA		 647 mode->flags |= DRM_MODE_FLAG_INTERLACE;
648
649 if (quirks & EDID_QUIRK_DETAILED_SYNC_PP) {
0454beab 650 pt->misc |= DRM_EDID_PT_HSYNC_POSITIVE | DRM_EDID_PT_VSYNC_POSITIVE;
f453ba04
DA		 651 }
652
0454beab
MD		 653 mode->flags |= (pt->misc & DRM_EDID_PT_HSYNC_POSITIVE) ?
654 DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC;
655 mode->flags |= (pt->misc & DRM_EDID_PT_VSYNC_POSITIVE) ?
656 DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC;
f453ba04 657
e14cbee4
MD		 658 mode->width_mm = pt->width_mm_lo | (pt->width_height_mm_hi & 0xf0) << 4;
659 mode->height_mm = pt->height_mm_lo | (pt->width_height_mm_hi & 0xf) << 8;
f453ba04
DA		 660
661 if (quirks & EDID_QUIRK_DETAILED_IN_CM) {
662 mode->width_mm *= 10;
663 mode->height_mm *= 10;
664 }
665
666 if (quirks & EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE) {
667 mode->width_mm = edid->width_cm * 10;
668 mode->height_mm = edid->height_cm * 10;
669 }
670
671 return mode;
672}
673
674/*
675 * Detailed mode info for the EDID "established modes" data to use.
676 */
677static struct drm_display_mode edid_est_modes[] = {
678 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 40000, 800, 840,
679 968, 1056, 0, 600, 601, 605, 628, 0,
680 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@60Hz */
681 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 36000, 800, 824,
682 896, 1024, 0, 600, 601, 603, 625, 0,
683 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@56Hz */
684 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 656,
685 720, 840, 0, 480, 481, 484, 500, 0,
686 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@75Hz */
687 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 664,
688 704, 832, 0, 480, 489, 491, 520, 0,
689 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@72Hz */
690 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 30240, 640, 704,
691 768, 864, 0, 480, 483, 486, 525, 0,
692 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@67Hz */
693 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 25200, 640, 656,
694 752, 800, 0, 480, 490, 492, 525, 0,
695 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@60Hz */
696 { DRM_MODE("720x400", DRM_MODE_TYPE_DRIVER, 35500, 720, 738,
697 846, 900, 0, 400, 421, 423, 449, 0,
698 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 720x400@88Hz */
699 { DRM_MODE("720x400", DRM_MODE_TYPE_DRIVER, 28320, 720, 738,
700 846, 900, 0, 400, 412, 414, 449, 0,
701 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 720x400@70Hz */
702 { DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 135000, 1280, 1296,
703 1440, 1688, 0, 1024, 1025, 1028, 1066, 0,
704 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 1280x1024@75Hz */
705 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 78800, 1024, 1040,
706 1136, 1312, 0, 768, 769, 772, 800, 0,
707 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 1024x768@75Hz */
708 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 75000, 1024, 1048,
709 1184, 1328, 0, 768, 771, 777, 806, 0,
710 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 1024x768@70Hz */
711 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 65000, 1024, 1048,
712 1184, 1344, 0, 768, 771, 777, 806, 0,
713 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 1024x768@60Hz */
714 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER,44900, 1024, 1032,
715 1208, 1264, 0, 768, 768, 776, 817, 0,
716 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC | DRM_MODE_FLAG_INTERLACE) }, /* 1024x768@43Hz */
717 { DRM_MODE("832x624", DRM_MODE_TYPE_DRIVER, 57284, 832, 864,
718 928, 1152, 0, 624, 625, 628, 667, 0,
719 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 832x624@75Hz */
720 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 49500, 800, 816,
721 896, 1056, 0, 600, 601, 604, 625, 0,
722 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@75Hz */
723 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 50000, 800, 856,
724 976, 1040, 0, 600, 637, 643, 666, 0,
725 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@72Hz */
726 { DRM_MODE("1152x864", DRM_MODE_TYPE_DRIVER, 108000, 1152, 1216,
727 1344, 1600, 0, 864, 865, 868, 900, 0,
728 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 1152x864@75Hz */
729};
730
731#define EDID_EST_TIMINGS 16
732#define EDID_STD_TIMINGS 8
733#define EDID_DETAILED_TIMINGS 4
734
735/**
736 * add_established_modes - get est. modes from EDID and add them
737 * @edid: EDID block to scan
738 *
739 * Each EDID block contains a bitmap of the supported "established modes" list
740 * (defined above). Tease them out and add them to the global modes list.
741 */
742static int add_established_modes(struct drm_connector *connector, struct edid *edid)
743{
744 struct drm_device *dev = connector->dev;
745 unsigned long est_bits = edid->established_timings.t1 |
746 (edid->established_timings.t2 << 8) |
747 ((edid->established_timings.mfg_rsvd & 0x80) << 9);
748 int i, modes = 0;
749
750 for (i = 0; i <= EDID_EST_TIMINGS; i++)
751 if (est_bits & (1<<i)) {
752 struct drm_display_mode *newmode;
753 newmode = drm_mode_duplicate(dev, &edid_est_modes[i]);
754 if (newmode) {
755 drm_mode_probed_add(connector, newmode);
756 modes++;
757 }
758 }
759
760 return modes;
761}
5c61259e
ZY		 762/**
763 * stanard_timing_level - get std. timing level(CVT/GTF/DMT)
764 * @edid: EDID block to scan
765 */
766static int standard_timing_level(struct edid *edid)
767{
768 if (edid->revision >= 2) {
769 if (edid->revision >= 4 && (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF))
770 return LEVEL_CVT;
771 return LEVEL_GTF;
772 }
773 return LEVEL_DMT;
774}
f453ba04
DA		 775
776/**
777 * add_standard_modes - get std. modes from EDID and add them
778 * @edid: EDID block to scan
779 *
780 * Standard modes can be calculated using the CVT standard. Grab them from
781 * @edid, calculate them, and add them to the list.
782 */
783static int add_standard_modes(struct drm_connector *connector, struct edid *edid)
784{
785 struct drm_device *dev = connector->dev;
786 int i, modes = 0;
5c61259e
ZY		 787 int timing_level;
788
789 timing_level = standard_timing_level(edid);
f453ba04
DA		 790
791 for (i = 0; i < EDID_STD_TIMINGS; i++) {
792 struct std_timing *t = &edid->standard_timings[i];
793 struct drm_display_mode *newmode;
794
795 /* If std timings bytes are 1, 1 it's empty */
0454beab 796 if (t->hsize == 1 && t->vfreq_aspect == 1)
f453ba04
DA		 797 continue;
798
5c61259e
ZY		 799 newmode = drm_mode_std(dev, &edid->standard_timings[i],
800 timing_level);
f453ba04
DA		 801 if (newmode) {
802 drm_mode_probed_add(connector, newmode);
803 modes++;
804 }
805 }
806
807 return modes;
808}
809
810/**
811 * add_detailed_modes - get detailed mode info from EDID data
812 * @connector: attached connector
813 * @edid: EDID block to scan
814 * @quirks: quirks to apply
815 *
816 * Some of the detailed timing sections may contain mode information. Grab
817 * it and add it to the list.
818 */
819static int add_detailed_info(struct drm_connector *connector,
820 struct edid *edid, u32 quirks)
821{
822 struct drm_device *dev = connector->dev;
823 int i, j, modes = 0;
5c61259e
ZY		 824 int timing_level;
825
826 timing_level = standard_timing_level(edid);
f453ba04
DA		 827
828 for (i = 0; i < EDID_DETAILED_TIMINGS; i++) {
829 struct detailed_timing *timing = &edid->detailed_timings[i];
830 struct detailed_non_pixel *data = &timing->data.other_data;
831 struct drm_display_mode *newmode;
832
ebb177d2
DA		 833 /* X server check is version 1.1 or higher */
834 if (edid->version == 1 && edid->revision >= 1 &&
835 !timing->pixel_clock) {
836 /* Other timing or info */
837 switch (data->type) {
838 case EDID_DETAIL_MONITOR_SERIAL:
839 break;
840 case EDID_DETAIL_MONITOR_STRING:
841 break;
842 case EDID_DETAIL_MONITOR_RANGE:
843 /* Get monitor range data */
844 break;
845 case EDID_DETAIL_MONITOR_NAME:
846 break;
847 case EDID_DETAIL_MONITOR_CPDATA:
848 break;
849 case EDID_DETAIL_STD_MODES:
850 /* Five modes per detailed section */
851 for (j = 0; j < 5; i++) {
852 struct std_timing *std;
853 struct drm_display_mode *newmode;
854
855 std = &data->data.timings[j];
51c8b407
DA		 856 newmode = drm_mode_std(dev, std,
857 timing_level);
ebb177d2
DA		 858 if (newmode) {
859 drm_mode_probed_add(connector, newmode);
860 modes++;
861 }
862 }
863 break;
864 default:
865 break;
866 }
867 } else {
f453ba04
DA		 868 newmode = drm_mode_detailed(dev, edid, timing, quirks);
869 if (!newmode)
870 continue;
871
872 /* First detailed mode is preferred */
0454beab 873 if (i == 0 && (edid->features & DRM_EDID_FEATURE_PREFERRED_TIMING))
f453ba04
DA		 874 newmode->type |= DRM_MODE_TYPE_PREFERRED;
875 drm_mode_probed_add(connector, newmode);
876
877 modes++;
f453ba04
DA		 878 }
879 }
880
881 return modes;
882}
882f0219
ZY		 883/**
884 * add_detailed_mode_eedid - get detailed mode info from addtional timing
885 * EDID block
886 * @connector: attached connector
887 * @edid: EDID block to scan(It is only to get addtional timing EDID block)
888 * @quirks: quirks to apply
889 *
890 * Some of the detailed timing sections may contain mode information. Grab
891 * it and add it to the list.
892 */
893static int add_detailed_info_eedid(struct drm_connector *connector,
894 struct edid *edid, u32 quirks)
895{
896 struct drm_device *dev = connector->dev;
897 int i, j, modes = 0;
898 char *edid_ext = NULL;
899 struct detailed_timing *timing;
900 struct detailed_non_pixel *data;
901 struct drm_display_mode *newmode;
902 int edid_ext_num;
903 int start_offset, end_offset;
904 int timing_level;
905
906 if (edid->version == 1 && edid->revision < 3) {
907 /* If the EDID version is less than 1.3, there is no
908 * extension EDID.
909 */
910 return 0;
911 }
912 if (!edid->extensions) {
913 /* if there is no extension EDID, it is unnecessary to
914 * parse the E-EDID to get detailed info
915 */
916 return 0;
917 }
918
919 /* Chose real EDID extension number */
920 edid_ext_num = edid->extensions > MAX_EDID_EXT_NUM ?
921 MAX_EDID_EXT_NUM : edid->extensions;
922
923 /* Find CEA extension */
924 for (i = 0; i < edid_ext_num; i++) {
925 edid_ext = (char *)edid + EDID_LENGTH * (i + 1);
926 /* This block is CEA extension */
927 if (edid_ext[0] == 0x02)
928 break;
929 }
930
931 if (i == edid_ext_num) {
932 /* if there is no additional timing EDID block, return */
933 return 0;
934 }
935
936 /* Get the start offset of detailed timing block */
937 start_offset = edid_ext[2];
938 if (start_offset == 0) {
939 /* If the start_offset is zero, it means that neither detailed
940 * info nor data block exist. In such case it is also
941 * unnecessary to parse the detailed timing info.
942 */
943 return 0;
944 }
945
946 timing_level = standard_timing_level(edid);
947 end_offset = EDID_LENGTH;
948 end_offset -= sizeof(struct detailed_timing);
949 for (i = start_offset; i < end_offset;
950 i += sizeof(struct detailed_timing)) {
951 timing = (struct detailed_timing *)(edid_ext + i);
952 data = &timing->data.other_data;
953 /* Detailed mode timing */
954 if (timing->pixel_clock) {
955 newmode = drm_mode_detailed(dev, edid, timing, quirks);
956 if (!newmode)
957 continue;
958
959 drm_mode_probed_add(connector, newmode);
960
961 modes++;
962 continue;
963 }
964
965 /* Other timing or info */
966 switch (data->type) {
967 case EDID_DETAIL_MONITOR_SERIAL:
968 break;
969 case EDID_DETAIL_MONITOR_STRING:
970 break;
971 case EDID_DETAIL_MONITOR_RANGE:
972 /* Get monitor range data */
973 break;
974 case EDID_DETAIL_MONITOR_NAME:
975 break;
976 case EDID_DETAIL_MONITOR_CPDATA:
977 break;
978 case EDID_DETAIL_STD_MODES:
979 /* Five modes per detailed section */
980 for (j = 0; j < 5; i++) {
981 struct std_timing *std;
982 struct drm_display_mode *newmode;
983
984 std = &data->data.timings[j];
985 newmode = drm_mode_std(dev, std, timing_level);
986 if (newmode) {
987 drm_mode_probed_add(connector, newmode);
988 modes++;
989 }
990 }
991 break;
992 default:
993 break;
994 }
995 }
996
997 return modes;
998}
f453ba04
DA		 999
1000#define DDC_ADDR 0x50
167f3a04
ML		 1001/**
1002 * Get EDID information via I2C.
1003 *
1004 * \param adapter : i2c device adaptor
1005 * \param buf : EDID data buffer to be filled
1006 * \param len : EDID data buffer length
1007 * \return 0 on success or -1 on failure.
1008 *
1009 * Try to fetch EDID information by calling i2c driver function.
1010 */
1011int drm_do_probe_ddc_edid(struct i2c_adapter *adapter,
1012 unsigned char *buf, int len)
f453ba04
DA		 1013{
1014 unsigned char start = 0x0;
f453ba04
DA		 1015 struct i2c_msg msgs[] = {
1016 {
1017 .addr = DDC_ADDR,
1018 .flags = 0,
1019 .len = 1,
1020 .buf = &start,
1021 }, {
1022 .addr = DDC_ADDR,
1023 .flags = I2C_M_RD,
167f3a04 1024 .len = len,
f453ba04
DA		 1025 .buf = buf,
1026 }
1027 };
1028
f453ba04 1029 if (i2c_transfer(adapter, msgs, 2) == 2)
167f3a04 1030 return 0;
f453ba04 1031
167f3a04 1032 return -1;
f453ba04
DA		 1033}
1034EXPORT_SYMBOL(drm_do_probe_ddc_edid);
1035
167f3a04
ML		 1036static int drm_ddc_read_edid(struct drm_connector *connector,
1037 struct i2c_adapter *adapter,
1038 char *buf, int len)
1039{
1040 int ret;
1041
61f11699 1042 ret = drm_do_probe_ddc_edid(adapter, buf, len);
167f3a04 1043 if (ret != 0) {
167f3a04
ML		 1044 goto end;
1045 }
1046 if (!edid_is_valid((struct edid *)buf)) {
1047 dev_warn(&connector->dev->pdev->dev, "%s: EDID invalid.\n",
1048 drm_get_connector_name(connector));
1049 ret = -1;
1050 }
1051end:
1052 return ret;
f453ba04
DA		 1053}
1054
1055/**
1056 * drm_get_edid - get EDID data, if available
1057 * @connector: connector we're probing
1058 * @adapter: i2c adapter to use for DDC
1059 *
1060 * Poke the given connector's i2c channel to grab EDID data if possible.
1061 *
1062 * Return edid data or NULL if we couldn't find any.
1063 */
1064struct edid *drm_get_edid(struct drm_connector *connector,
1065 struct i2c_adapter *adapter)
1066{
167f3a04 1067 int ret;
f453ba04
DA		 1068 struct edid *edid;
1069
167f3a04
ML		 1070 edid = kmalloc(EDID_LENGTH * (MAX_EDID_EXT_NUM + 1),
1071 GFP_KERNEL);
1072 if (edid == NULL) {
1073 dev_warn(&connector->dev->pdev->dev,
1074 "Failed to allocate EDID\n");
1075 goto end;
f453ba04 1076 }
167f3a04
ML		 1077
1078 /* Read first EDID block */
1079 ret = drm_ddc_read_edid(connector, adapter,
1080 (unsigned char *)edid, EDID_LENGTH);
1081 if (ret != 0)
1082 goto clean_up;
1083
1084 /* There are EDID extensions to be read */
1085 if (edid->extensions != 0) {
1086 int edid_ext_num = edid->extensions;
1087
1088 if (edid_ext_num > MAX_EDID_EXT_NUM) {
1089 dev_warn(&connector->dev->pdev->dev,
1090 "The number of extension(%d) is "
1091 "over max (%d), actually read number (%d)\n",
1092 edid_ext_num, MAX_EDID_EXT_NUM,
1093 MAX_EDID_EXT_NUM);
1094 /* Reset EDID extension number to be read */
1095 edid_ext_num = MAX_EDID_EXT_NUM;
1096 }
1097 /* Read EDID including extensions too */
1098 ret = drm_ddc_read_edid(connector, adapter, (char *)edid,
1099 EDID_LENGTH * (edid_ext_num + 1));
1100 if (ret != 0)
1101 goto clean_up;
1102
f453ba04
DA		 1103 }
1104
1105 connector->display_info.raw_edid = (char *)edid;
167f3a04 1106 goto end;
f453ba04 1107
167f3a04
ML		 1108clean_up:
1109 kfree(edid);
1110 edid = NULL;
1111end:
f453ba04 1112 return edid;
167f3a04 1113
f453ba04
DA		 1114}
1115EXPORT_SYMBOL(drm_get_edid);
1116
f23c20c8
ML		 1117#define HDMI_IDENTIFIER 0x000C03
1118#define VENDOR_BLOCK 0x03
1119/**
1120 * drm_detect_hdmi_monitor - detect whether monitor is hdmi.
1121 * @edid: monitor EDID information
1122 *
1123 * Parse the CEA extension according to CEA-861-B.
1124 * Return true if HDMI, false if not or unknown.
1125 */
1126bool drm_detect_hdmi_monitor(struct edid *edid)
1127{
1128 char *edid_ext = NULL;
1129 int i, hdmi_id, edid_ext_num;
1130 int start_offset, end_offset;
1131 bool is_hdmi = false;
1132
1133 /* No EDID or EDID extensions */
1134 if (edid == NULL || edid->extensions == 0)
1135 goto end;
1136
1137 /* Chose real EDID extension number */
1138 edid_ext_num = edid->extensions > MAX_EDID_EXT_NUM ?
1139 MAX_EDID_EXT_NUM : edid->extensions;
1140
1141 /* Find CEA extension */
1142 for (i = 0; i < edid_ext_num; i++) {
1143 edid_ext = (char *)edid + EDID_LENGTH * (i + 1);
1144 /* This block is CEA extension */
1145 if (edid_ext[0] == 0x02)
1146 break;
1147 }
1148
1149 if (i == edid_ext_num)
1150 goto end;
1151
1152 /* Data block offset in CEA extension block */
1153 start_offset = 4;
1154 end_offset = edid_ext[2];
1155
1156 /*
1157 * Because HDMI identifier is in Vendor Specific Block,
1158 * search it from all data blocks of CEA extension.
1159 */
1160 for (i = start_offset; i < end_offset;
1161 /* Increased by data block len */
1162 i += ((edid_ext[i] & 0x1f) + 1)) {
1163 /* Find vendor specific block */
1164 if ((edid_ext[i] >> 5) == VENDOR_BLOCK) {
1165 hdmi_id = edid_ext[i + 1] | (edid_ext[i + 2] << 8) |
1166 edid_ext[i + 3] << 16;
1167 /* Find HDMI identifier */
1168 if (hdmi_id == HDMI_IDENTIFIER)
1169 is_hdmi = true;
1170 break;
1171 }
1172 }
1173
1174end:
1175 return is_hdmi;
1176}
1177EXPORT_SYMBOL(drm_detect_hdmi_monitor);
1178
f453ba04
DA		 1179/**
1180 * drm_add_edid_modes - add modes from EDID data, if available
1181 * @connector: connector we're probing
1182 * @edid: edid data
1183 *
1184 * Add the specified modes to the connector's mode list.
1185 *
1186 * Return number of modes added or 0 if we couldn't find any.
1187 */
1188int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid)
1189{
1190 int num_modes = 0;
1191 u32 quirks;
1192
1193 if (edid == NULL) {
1194 return 0;
1195 }
1196 if (!edid_is_valid(edid)) {
1197 dev_warn(&connector->dev->pdev->dev, "%s: EDID invalid.\n",
1198 drm_get_connector_name(connector));
1199 return 0;
1200 }
1201
1202 quirks = edid_get_quirks(edid);
1203
1204 num_modes += add_established_modes(connector, edid);
1205 num_modes += add_standard_modes(connector, edid);
1206 num_modes += add_detailed_info(connector, edid, quirks);
882f0219 1207 num_modes += add_detailed_info_eedid(connector, edid, quirks);
f453ba04
DA		 1208
1209 if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75))
1210 edid_fixup_preferred(connector, quirks);
1211
0454beab
MD		 1212 connector->display_info.serration_vsync = (edid->input & DRM_EDID_INPUT_SERRATION_VSYNC) ? 1 : 0;
1213 connector->display_info.sync_on_green = (edid->input & DRM_EDID_INPUT_SYNC_ON_GREEN) ? 1 : 0;
1214 connector->display_info.composite_sync = (edid->input & DRM_EDID_INPUT_COMPOSITE_SYNC) ? 1 : 0;
1215 connector->display_info.separate_syncs = (edid->input & DRM_EDID_INPUT_SEPARATE_SYNCS) ? 1 : 0;
1216 connector->display_info.blank_to_black = (edid->input & DRM_EDID_INPUT_BLANK_TO_BLACK) ? 1 : 0;
1217 connector->display_info.video_level = (edid->input & DRM_EDID_INPUT_VIDEO_LEVEL) >> 5;
1218 connector->display_info.digital = (edid->input & DRM_EDID_INPUT_DIGITAL) ? 1 : 0;
f453ba04
DA		 1219 connector->display_info.width_mm = edid->width_cm * 10;
1220 connector->display_info.height_mm = edid->height_cm * 10;
1221 connector->display_info.gamma = edid->gamma;
0454beab
MD		 1222 connector->display_info.gtf_supported = (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF) ? 1 : 0;
1223 connector->display_info.standard_color = (edid->features & DRM_EDID_FEATURE_STANDARD_COLOR) ? 1 : 0;
1224 connector->display_info.display_type = (edid->features & DRM_EDID_FEATURE_DISPLAY_TYPE) >> 3;
1225 connector->display_info.active_off_supported = (edid->features & DRM_EDID_FEATURE_PM_ACTIVE_OFF) ? 1 : 0;
1226 connector->display_info.suspend_supported = (edid->features & DRM_EDID_FEATURE_PM_SUSPEND) ? 1 : 0;
1227 connector->display_info.standby_supported = (edid->features & DRM_EDID_FEATURE_PM_STANDBY) ? 1 : 0;
f453ba04
DA		 1228 connector->display_info.gamma = edid->gamma;
1229
1230 return num_modes;
1231}
1232EXPORT_SYMBOL(drm_add_edid_modes);
f0fda0a4
ZY		 1233
1234/**
1235 * drm_add_modes_noedid - add modes for the connectors without EDID
1236 * @connector: connector we're probing
1237 * @hdisplay: the horizontal display limit
1238 * @vdisplay: the vertical display limit
1239 *
1240 * Add the specified modes to the connector's mode list. Only when the
1241 * hdisplay/vdisplay is not beyond the given limit, it will be added.
1242 *
1243 * Return number of modes added or 0 if we couldn't find any.
1244 */
1245int drm_add_modes_noedid(struct drm_connector *connector,
1246 int hdisplay, int vdisplay)
1247{
1248 int i, count, num_modes = 0;
1249 struct drm_display_mode *mode, *ptr;
1250 struct drm_device *dev = connector->dev;
1251
1252 count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
1253 if (hdisplay < 0)
1254 hdisplay = 0;
1255 if (vdisplay < 0)
1256 vdisplay = 0;
1257
1258 for (i = 0; i < count; i++) {
1259 ptr = &drm_dmt_modes[i];
1260 if (hdisplay && vdisplay) {
1261 /*
1262 * Only when two are valid, they will be used to check
1263 * whether the mode should be added to the mode list of
1264 * the connector.
1265 */
1266 if (ptr->hdisplay > hdisplay ||
1267 ptr->vdisplay > vdisplay)
1268 continue;
1269 }
1270 mode = drm_mode_duplicate(dev, ptr);
1271 if (mode) {
1272 drm_mode_probed_add(connector, mode);
1273 num_modes++;
1274 }
1275 }
1276 return num_modes;
1277}
1278EXPORT_SYMBOL(drm_add_modes_noedid);
Linux kernel - Deliverables
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