?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
initial commit with v2.6.32.60
[linux-2.6.32.60-moxart.git] / drivers / gpu / drm / drm_edid.c
blob1097dece323cafadbf6c3532aa42cbe9b36a27b5
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 /* Envision EN2028 */
89 { "EPI", 8232, EDID_QUIRK_PREFER_LARGE_60 },
90
91 /* Funai Electronics PM36B */
92 { "FCM", 13600, EDID_QUIRK_PREFER_LARGE_75 |
93 EDID_QUIRK_DETAILED_IN_CM },
94
95 /* LG Philips LCD LP154W01-A5 */
96 { "LPL", 0, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
97 { "LPL", 0x2a00, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
98
99 /* Philips 107p5 CRT */
100 { "PHL", 57364, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
101
102 /* Proview AY765C */
103 { "PTS", 765, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
104
105 /* Samsung SyncMaster 205BW. Note: irony */
106 { "SAM", 541, EDID_QUIRK_DETAILED_SYNC_PP },
107 /* Samsung SyncMaster 22[5-6]BW */
108 { "SAM", 596, EDID_QUIRK_PREFER_LARGE_60 },
109 { "SAM", 638, EDID_QUIRK_PREFER_LARGE_60 },
110 };
111
112
113 /* Valid EDID header has these bytes */
114 static const u8 edid_header[] = {
115 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00
116 };
117
118 /**
119 * edid_is_valid - sanity check EDID data
120 * @edid: EDID data
121 *
122 * Sanity check the EDID block by looking at the header, the version number
123 * and the checksum. Return 0 if the EDID doesn't check out, or 1 if it's
124 * valid.
125 */
126 static bool edid_is_valid(struct edid *edid)
127 {
128 int i;
129 u8 csum = 0;
130 u8 *raw_edid = (u8 *)edid;
131
132 if (memcmp(edid->header, edid_header, sizeof(edid_header)))
133 goto bad;
134 if (edid->version != 1) {
135 DRM_ERROR("EDID has major version %d, instead of 1\n", edid->version);
136 goto bad;
137 }
138 if (edid->revision > 4)
139 DRM_DEBUG("EDID minor > 4, assuming backward compatibility\n");
140
141 for (i = 0; i < EDID_LENGTH; i++)
142 csum += raw_edid[i];
143 if (csum) {
144 DRM_ERROR("EDID checksum is invalid, remainder is %d\n", csum);
145 goto bad;
146 }
147
148 return 1;
149
150 bad:
151 if (raw_edid) {
152 DRM_ERROR("Raw EDID:\n");
153 print_hex_dump_bytes(KERN_ERR, DUMP_PREFIX_NONE, raw_edid, EDID_LENGTH);
154 printk("\n");
155 }
156 return 0;
157 }
158
159 /**
160 * edid_vendor - match a string against EDID's obfuscated vendor field
161 * @edid: EDID to match
162 * @vendor: vendor string
163 *
164 * Returns true if @vendor is in @edid, false otherwise
165 */
166 static bool edid_vendor(struct edid *edid, char *vendor)
167 {
168 char edid_vendor[3];
169
170 edid_vendor[0] = ((edid->mfg_id[0] & 0x7c) >> 2) + '@';
171 edid_vendor[1] = (((edid->mfg_id[0] & 0x3) << 3) |
172 ((edid->mfg_id[1] & 0xe0) >> 5)) + '@';
173 edid_vendor[2] = (edid->mfg_id[1] & 0x1f) + '@';
174
175 return !strncmp(edid_vendor, vendor, 3);
176 }
177
178 /**
179 * edid_get_quirks - return quirk flags for a given EDID
180 * @edid: EDID to process
181 *
182 * This tells subsequent routines what fixes they need to apply.
183 */
184 static u32 edid_get_quirks(struct edid *edid)
185 {
186 struct edid_quirk *quirk;
187 int i;
188
189 for (i = 0; i < ARRAY_SIZE(edid_quirk_list); i++) {
190 quirk = &edid_quirk_list[i];
191
192 if (edid_vendor(edid, quirk->vendor) &&
193 (EDID_PRODUCT_ID(edid) == quirk->product_id))
194 return quirk->quirks;
195 }
196
197 return 0;
198 }
199
200 #define MODE_SIZE(m) ((m)->hdisplay * (m)->vdisplay)
201 #define MODE_REFRESH_DIFF(m,r) (abs((m)->vrefresh - target_refresh))
202
203
204 /**
205 * edid_fixup_preferred - set preferred modes based on quirk list
206 * @connector: has mode list to fix up
207 * @quirks: quirks list
208 *
209 * Walk the mode list for @connector, clearing the preferred status
210 * on existing modes and setting it anew for the right mode ala @quirks.
211 */
212 static void edid_fixup_preferred(struct drm_connector *connector,
213 u32 quirks)
214 {
215 struct drm_display_mode *t, *cur_mode, *preferred_mode;
216 int target_refresh = 0;
217
218 if (list_empty(&connector->probed_modes))
219 return;
220
221 if (quirks & EDID_QUIRK_PREFER_LARGE_60)
222 target_refresh = 60;
223 if (quirks & EDID_QUIRK_PREFER_LARGE_75)
224 target_refresh = 75;
225
226 preferred_mode = list_first_entry(&connector->probed_modes,
227 struct drm_display_mode, head);
228
229 list_for_each_entry_safe(cur_mode, t, &connector->probed_modes, head) {
230 cur_mode->type &= ~DRM_MODE_TYPE_PREFERRED;
231
232 if (cur_mode == preferred_mode)
233 continue;
234
235 /* Largest mode is preferred */
236 if (MODE_SIZE(cur_mode) > MODE_SIZE(preferred_mode))
237 preferred_mode = cur_mode;
238
239 /* At a given size, try to get closest to target refresh */
240 if ((MODE_SIZE(cur_mode) == MODE_SIZE(preferred_mode)) &&
241 MODE_REFRESH_DIFF(cur_mode, target_refresh) <
242 MODE_REFRESH_DIFF(preferred_mode, target_refresh)) {
243 preferred_mode = cur_mode;
244 }
245 }
246
247 preferred_mode->type |= DRM_MODE_TYPE_PREFERRED;
248 }
249
250 /*
251 * Add the Autogenerated from the DMT spec.
252 * This table is copied from xfree86/modes/xf86EdidModes.c.
253 * But the mode with Reduced blank feature is deleted.
254 */
255 static struct drm_display_mode drm_dmt_modes[] = {
256 /* 640x350@85Hz */
257 { DRM_MODE("640x350", DRM_MODE_TYPE_DRIVER, 31500, 640, 672,
258 736, 832, 0, 350, 382, 385, 445, 0,
259 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC) },
260 /* 640x400@85Hz */
261 { DRM_MODE("640x400", DRM_MODE_TYPE_DRIVER, 31500, 640, 672,
262 736, 832, 0, 400, 401, 404, 445, 0,
263 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
264 /* 720x400@85Hz */
265 { DRM_MODE("720x400", DRM_MODE_TYPE_DRIVER, 35500, 720, 756,
266 828, 936, 0, 400, 401, 404, 446, 0,
267 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
268 /* 640x480@60Hz */
269 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 25175, 640, 656,
270 752, 800, 0, 480, 489, 492, 525, 0,
271 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
272 /* 640x480@72Hz */
273 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 664,
274 704, 832, 0, 480, 489, 492, 520, 0,
275 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
276 /* 640x480@75Hz */
277 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 656,
278 720, 840, 0, 480, 481, 484, 500, 0,
279 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
280 /* 640x480@85Hz */
281 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 36000, 640, 696,
282 752, 832, 0, 480, 481, 484, 509, 0,
283 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
284 /* 800x600@56Hz */
285 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 36000, 800, 824,
286 896, 1024, 0, 600, 601, 603, 625, 0,
287 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
288 /* 800x600@60Hz */
289 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 40000, 800, 840,
290 968, 1056, 0, 600, 601, 605, 628, 0,
291 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
292 /* 800x600@72Hz */
293 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 50000, 800, 856,
294 976, 1040, 0, 600, 637, 643, 666, 0,
295 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
296 /* 800x600@75Hz */
297 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 49500, 800, 816,
298 896, 1056, 0, 600, 601, 604, 625, 0,
299 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
300 /* 800x600@85Hz */
301 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 56250, 800, 832,
302 896, 1048, 0, 600, 601, 604, 631, 0,
303 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
304 /* 848x480@60Hz */
305 { DRM_MODE("848x480", DRM_MODE_TYPE_DRIVER, 33750, 848, 864,
306 976, 1088, 0, 480, 486, 494, 517, 0,
307 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
308 /* 1024x768@43Hz, interlace */
309 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 44900, 1024, 1032,
310 1208, 1264, 0, 768, 768, 772, 817, 0,
311 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC |
312 DRM_MODE_FLAG_INTERLACE) },
313 /* 1024x768@60Hz */
314 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 65000, 1024, 1048,
315 1184, 1344, 0, 768, 771, 777, 806, 0,
316 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
317 /* 1024x768@70Hz */
318 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 75000, 1024, 1048,
319 1184, 1328, 0, 768, 771, 777, 806, 0,
320 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
321 /* 1024x768@75Hz */
322 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 78750, 1024, 1040,
323 1136, 1312, 0, 768, 769, 772, 800, 0,
324 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
325 /* 1024x768@85Hz */
326 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 94500, 1024, 1072,
327 1168, 1376, 0, 768, 769, 772, 808, 0,
328 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
329 /* 1152x864@75Hz */
330 { DRM_MODE("1152x864", DRM_MODE_TYPE_DRIVER, 108000, 1152, 1216,
331 1344, 1600, 0, 864, 865, 868, 900, 0,
332 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
333 /* 1280x768@60Hz */
334 { DRM_MODE("1280x768", DRM_MODE_TYPE_DRIVER, 79500, 1280, 1344,
335 1472, 1664, 0, 768, 771, 778, 798, 0,
336 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
337 /* 1280x768@75Hz */
338 { DRM_MODE("1280x768", DRM_MODE_TYPE_DRIVER, 102250, 1280, 1360,
339 1488, 1696, 0, 768, 771, 778, 805, 0,
340 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC) },
341 /* 1280x768@85Hz */
342 { DRM_MODE("1280x768", DRM_MODE_TYPE_DRIVER, 117500, 1280, 1360,
343 1496, 1712, 0, 768, 771, 778, 809, 0,
344 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
345 /* 1280x800@60Hz */
346 { DRM_MODE("1280x800", DRM_MODE_TYPE_DRIVER, 83500, 1280, 1352,
347 1480, 1680, 0, 800, 803, 809, 831, 0,
348 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC) },
349 /* 1280x800@75Hz */
350 { DRM_MODE("1280x800", DRM_MODE_TYPE_DRIVER, 106500, 1280, 1360,
351 1488, 1696, 0, 800, 803, 809, 838, 0,
352 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
353 /* 1280x800@85Hz */
354 { DRM_MODE("1280x800", DRM_MODE_TYPE_DRIVER, 122500, 1280, 1360,
355 1496, 1712, 0, 800, 803, 809, 843, 0,
356 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
357 /* 1280x960@60Hz */
358 { DRM_MODE("1280x960", DRM_MODE_TYPE_DRIVER, 108000, 1280, 1376,
359 1488, 1800, 0, 960, 961, 964, 1000, 0,
360 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
361 /* 1280x960@85Hz */
362 { DRM_MODE("1280x960", DRM_MODE_TYPE_DRIVER, 148500, 1280, 1344,
363 1504, 1728, 0, 960, 961, 964, 1011, 0,
364 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
365 /* 1280x1024@60Hz */
366 { DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 108000, 1280, 1328,
367 1440, 1688, 0, 1024, 1025, 1028, 1066, 0,
368 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
369 /* 1280x1024@75Hz */
370 { DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 135000, 1280, 1296,
371 1440, 1688, 0, 1024, 1025, 1028, 1066, 0,
372 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
373 /* 1280x1024@85Hz */
374 { DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 157500, 1280, 1344,
375 1504, 1728, 0, 1024, 1025, 1028, 1072, 0,
376 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
377 /* 1360x768@60Hz */
378 { DRM_MODE("1360x768", DRM_MODE_TYPE_DRIVER, 85500, 1360, 1424,
379 1536, 1792, 0, 768, 771, 777, 795, 0,
380 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
381 /* 1440x1050@60Hz */
382 { DRM_MODE("1400x1050", DRM_MODE_TYPE_DRIVER, 121750, 1400, 1488,
383 1632, 1864, 0, 1050, 1053, 1057, 1089, 0,
384 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
385 /* 1440x1050@75Hz */
386 { DRM_MODE("1400x1050", DRM_MODE_TYPE_DRIVER, 156000, 1400, 1504,
387 1648, 1896, 0, 1050, 1053, 1057, 1099, 0,
388 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
389 /* 1440x1050@85Hz */
390 { DRM_MODE("1400x1050", DRM_MODE_TYPE_DRIVER, 179500, 1400, 1504,
391 1656, 1912, 0, 1050, 1053, 1057, 1105, 0,
392 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
393 /* 1440x900@60Hz */
394 { DRM_MODE("1440x900", DRM_MODE_TYPE_DRIVER, 106500, 1440, 1520,
395 1672, 1904, 0, 900, 903, 909, 934, 0,
396 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
397 /* 1440x900@75Hz */
398 { DRM_MODE("1440x900", DRM_MODE_TYPE_DRIVER, 136750, 1440, 1536,
399 1688, 1936, 0, 900, 903, 909, 942, 0,
400 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
401 /* 1440x900@85Hz */
402 { DRM_MODE("1440x900", DRM_MODE_TYPE_DRIVER, 157000, 1440, 1544,
403 1696, 1952, 0, 900, 903, 909, 948, 0,
404 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
405 /* 1600x1200@60Hz */
406 { DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 162000, 1600, 1664,
407 1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
408 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
409 /* 1600x1200@65Hz */
410 { DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 175500, 1600, 1664,
411 1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
412 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
413 /* 1600x1200@70Hz */
414 { DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 189000, 1600, 1664,
415 1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
416 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
417 /* 1600x1200@75Hz */
418 { DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 2025000, 1600, 1664,
419 1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
420 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
421 /* 1600x1200@85Hz */
422 { DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 229500, 1600, 1664,
423 1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
424 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
425 /* 1680x1050@60Hz */
426 { DRM_MODE("1680x1050", DRM_MODE_TYPE_DRIVER, 146250, 1680, 1784,
427 1960, 2240, 0, 1050, 1053, 1059, 1089, 0,
428 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
429 /* 1680x1050@75Hz */
430 { DRM_MODE("1680x1050", DRM_MODE_TYPE_DRIVER, 187000, 1680, 1800,
431 1976, 2272, 0, 1050, 1053, 1059, 1099, 0,
432 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
433 /* 1680x1050@85Hz */
434 { DRM_MODE("1680x1050", DRM_MODE_TYPE_DRIVER, 214750, 1680, 1808,
435 1984, 2288, 0, 1050, 1053, 1059, 1105, 0,
436 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
437 /* 1792x1344@60Hz */
438 { DRM_MODE("1792x1344", DRM_MODE_TYPE_DRIVER, 204750, 1792, 1920,
439 2120, 2448, 0, 1344, 1345, 1348, 1394, 0,
440 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
441 /* 1729x1344@75Hz */
442 { DRM_MODE("1792x1344", DRM_MODE_TYPE_DRIVER, 261000, 1792, 1888,
443 2104, 2456, 0, 1344, 1345, 1348, 1417, 0,
444 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
445 /* 1853x1392@60Hz */
446 { DRM_MODE("1856x1392", DRM_MODE_TYPE_DRIVER, 218250, 1856, 1952,
447 2176, 2528, 0, 1392, 1393, 1396, 1439, 0,
448 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
449 /* 1856x1392@75Hz */
450 { DRM_MODE("1856x1392", DRM_MODE_TYPE_DRIVER, 288000, 1856, 1984,
451 2208, 2560, 0, 1392, 1395, 1399, 1500, 0,
452 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
453 /* 1920x1200@60Hz */
454 { DRM_MODE("1920x1200", DRM_MODE_TYPE_DRIVER, 193250, 1920, 2056,
455 2256, 2592, 0, 1200, 1203, 1209, 1245, 0,
456 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
457 /* 1920x1200@75Hz */
458 { DRM_MODE("1920x1200", DRM_MODE_TYPE_DRIVER, 245250, 1920, 2056,
459 2264, 2608, 0, 1200, 1203, 1209, 1255, 0,
460 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
461 /* 1920x1200@85Hz */
462 { DRM_MODE("1920x1200", DRM_MODE_TYPE_DRIVER, 281250, 1920, 2064,
463 2272, 2624, 0, 1200, 1203, 1209, 1262, 0,
464 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
465 /* 1920x1440@60Hz */
466 { DRM_MODE("1920x1440", DRM_MODE_TYPE_DRIVER, 234000, 1920, 2048,
467 2256, 2600, 0, 1440, 1441, 1444, 1500, 0,
468 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
469 /* 1920x1440@75Hz */
470 { DRM_MODE("1920x1440", DRM_MODE_TYPE_DRIVER, 297000, 1920, 2064,
471 2288, 2640, 0, 1440, 1441, 1444, 1500, 0,
472 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
473 /* 2560x1600@60Hz */
474 { DRM_MODE("2560x1600", DRM_MODE_TYPE_DRIVER, 348500, 2560, 2752,
475 3032, 3504, 0, 1600, 1603, 1609, 1658, 0,
476 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
477 /* 2560x1600@75HZ */
478 { DRM_MODE("2560x1600", DRM_MODE_TYPE_DRIVER, 443250, 2560, 2768,
479 3048, 3536, 0, 1600, 1603, 1609, 1672, 0,
480 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
481 /* 2560x1600@85HZ */
482 { DRM_MODE("2560x1600", DRM_MODE_TYPE_DRIVER, 505250, 2560, 2768,
483 3048, 3536, 0, 1600, 1603, 1609, 1682, 0,
484 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
485 };
486
487 static struct drm_display_mode *drm_find_dmt(struct drm_device *dev,
488 int hsize, int vsize, int fresh)
489 {
490 int i, count;
491 struct drm_display_mode *ptr, *mode;
492
493 count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
494 mode = NULL;
495 for (i = 0; i < count; i++) {
496 ptr = &drm_dmt_modes[i];
497 if (hsize == ptr->hdisplay &&
498 vsize == ptr->vdisplay &&
499 fresh == drm_mode_vrefresh(ptr)) {
500 /* get the expected default mode */
501 mode = drm_mode_duplicate(dev, ptr);
502 break;
503 }
504 }
505 return mode;
506 }
507
508 /*
509 * 0 is reserved. The spec says 0x01 fill for unused timings. Some old
510 * monitors fill with ascii space (0x20) instead.
511 */
512 static int
513 bad_std_timing(u8 a, u8 b)
514 {
515 return (a == 0x00 && b == 0x00) ||
516 (a == 0x01 && b == 0x01) ||
517 (a == 0x20 && b == 0x20);
518 }
519
520 /**
521 * drm_mode_std - convert standard mode info (width, height, refresh) into mode
522 * @t: standard timing params
523 * @timing_level: standard timing level
524 *
525 * Take the standard timing params (in this case width, aspect, and refresh)
526 * and convert them into a real mode using CVT/GTF/DMT.
527 *
528 * Punts for now, but should eventually use the FB layer's CVT based mode
529 * generation code.
530 */
531 struct drm_display_mode *drm_mode_std(struct drm_device *dev,
532 struct std_timing *t,
533 int revision,
534 int timing_level)
535 {
536 struct drm_display_mode *mode;
537 int hsize, vsize;
538 int vrefresh_rate;
539 unsigned aspect_ratio = (t->vfreq_aspect & EDID_TIMING_ASPECT_MASK)
540 >> EDID_TIMING_ASPECT_SHIFT;
541 unsigned vfreq = (t->vfreq_aspect & EDID_TIMING_VFREQ_MASK)
542 >> EDID_TIMING_VFREQ_SHIFT;
543
544 if (bad_std_timing(t->hsize, t->vfreq_aspect))
545 return NULL;
546
547 /* According to the EDID spec, the hdisplay = hsize * 8 + 248 */
548 hsize = t->hsize * 8 + 248;
549 /* vrefresh_rate = vfreq + 60 */
550 vrefresh_rate = vfreq + 60;
551 /* the vdisplay is calculated based on the aspect ratio */
552 if (aspect_ratio == 0) {
553 if (revision < 3)
554 vsize = hsize;
555 else
556 vsize = (hsize * 10) / 16;
557 } else if (aspect_ratio == 1)
558 vsize = (hsize * 3) / 4;
559 else if (aspect_ratio == 2)
560 vsize = (hsize * 4) / 5;
561 else
562 vsize = (hsize * 9) / 16;
563 /* HDTV hack */
564 if (hsize == 1360 && vsize == 765 && vrefresh_rate == 60) {
565 mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0,
566 false);
567 mode->hdisplay = 1366;
568 mode->hsync_start = mode->hsync_start - 1;
569 mode->hsync_end = mode->hsync_end - 1;
570 return mode;
571 }
572 mode = NULL;
573 /* check whether it can be found in default mode table */
574 mode = drm_find_dmt(dev, hsize, vsize, vrefresh_rate);
575 if (mode)
576 return mode;
577
578 switch (timing_level) {
579 case LEVEL_DMT:
580 break;
581 case LEVEL_GTF:
582 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
583 break;
584 case LEVEL_CVT:
585 mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0,
586 false);
587 break;
588 }
589 return mode;
590 }
591
592 /**
593 * drm_mode_detailed - create a new mode from an EDID detailed timing section
594 * @dev: DRM device (needed to create new mode)
595 * @edid: EDID block
596 * @timing: EDID detailed timing info
597 * @quirks: quirks to apply
598 *
599 * An EDID detailed timing block contains enough info for us to create and
600 * return a new struct drm_display_mode.
601 */
602 static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev,
603 struct edid *edid,
604 struct detailed_timing *timing,
605 u32 quirks)
606 {
607 struct drm_display_mode *mode;
608 struct detailed_pixel_timing *pt = &timing->data.pixel_data;
609 unsigned hactive = (pt->hactive_hblank_hi & 0xf0) << 4 | pt->hactive_lo;
610 unsigned vactive = (pt->vactive_vblank_hi & 0xf0) << 4 | pt->vactive_lo;
611 unsigned hblank = (pt->hactive_hblank_hi & 0xf) << 8 | pt->hblank_lo;
612 unsigned vblank = (pt->vactive_vblank_hi & 0xf) << 8 | pt->vblank_lo;
613 unsigned hsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc0) << 2 | pt->hsync_offset_lo;
614 unsigned hsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x30) << 4 | pt->hsync_pulse_width_lo;
615 unsigned vsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc) >> 2 | pt->vsync_offset_pulse_width_lo >> 4;
616 unsigned vsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x3) << 4 | (pt->vsync_offset_pulse_width_lo & 0xf);
617
618 /* ignore tiny modes */
619 if (hactive < 64 || vactive < 64)
620 return NULL;
621
622 if (pt->misc & DRM_EDID_PT_STEREO) {
623 printk(KERN_WARNING "stereo mode not supported\n");
624 return NULL;
625 }
626 if (!(pt->misc & DRM_EDID_PT_SEPARATE_SYNC)) {
627 printk(KERN_WARNING "integrated sync not supported\n");
628 return NULL;
629 }
630
631 /* it is incorrect if hsync/vsync width is zero */
632 if (!hsync_pulse_width || !vsync_pulse_width) {
633 DRM_DEBUG_KMS("Incorrect Detailed timing. "
634 "Wrong Hsync/Vsync pulse width\n");
635 return NULL;
636 }
637 mode = drm_mode_create(dev);
638 if (!mode)
639 return NULL;
640
641 mode->type = DRM_MODE_TYPE_DRIVER;
642
643 if (quirks & EDID_QUIRK_135_CLOCK_TOO_HIGH)
644 timing->pixel_clock = cpu_to_le16(1088);
645
646 mode->clock = le16_to_cpu(timing->pixel_clock) * 10;
647
648 mode->hdisplay = hactive;
649 mode->hsync_start = mode->hdisplay + hsync_offset;
650 mode->hsync_end = mode->hsync_start + hsync_pulse_width;
651 mode->htotal = mode->hdisplay + hblank;
652
653 mode->vdisplay = vactive;
654 mode->vsync_start = mode->vdisplay + vsync_offset;
655 mode->vsync_end = mode->vsync_start + vsync_pulse_width;
656 mode->vtotal = mode->vdisplay + vblank;
657
658 /* Some EDIDs have bogus h/vtotal values */
659 if (mode->hsync_end > mode->htotal)
660 mode->htotal = mode->hsync_end + 1;
661 if (mode->vsync_end > mode->vtotal)
662 mode->vtotal = mode->vsync_end + 1;
663
664 drm_mode_set_name(mode);
665
666 if (pt->misc & DRM_EDID_PT_INTERLACED)
667 mode->flags |= DRM_MODE_FLAG_INTERLACE;
668
669 if (quirks & EDID_QUIRK_DETAILED_SYNC_PP) {
670 pt->misc |= DRM_EDID_PT_HSYNC_POSITIVE | DRM_EDID_PT_VSYNC_POSITIVE;
671 }
672
673 mode->flags |= (pt->misc & DRM_EDID_PT_HSYNC_POSITIVE) ?
674 DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC;
675 mode->flags |= (pt->misc & DRM_EDID_PT_VSYNC_POSITIVE) ?
676 DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC;
677
678 mode->width_mm = pt->width_mm_lo | (pt->width_height_mm_hi & 0xf0) << 4;
679 mode->height_mm = pt->height_mm_lo | (pt->width_height_mm_hi & 0xf) << 8;
680
681 if (quirks & EDID_QUIRK_DETAILED_IN_CM) {
682 mode->width_mm *= 10;
683 mode->height_mm *= 10;
684 }
685
686 if (quirks & EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE) {
687 mode->width_mm = edid->width_cm * 10;
688 mode->height_mm = edid->height_cm * 10;
689 }
690
691 return mode;
692 }
693
694 /*
695 * Detailed mode info for the EDID "established modes" data to use.
696 */
697 static struct drm_display_mode edid_est_modes[] = {
698 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 40000, 800, 840,
699 968, 1056, 0, 600, 601, 605, 628, 0,
700 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@60Hz */
701 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 36000, 800, 824,
702 896, 1024, 0, 600, 601, 603, 625, 0,
703 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@56Hz */
704 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 656,
705 720, 840, 0, 480, 481, 484, 500, 0,
706 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@75Hz */
707 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 664,
708 704, 832, 0, 480, 489, 491, 520, 0,
709 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@72Hz */
710 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 30240, 640, 704,
711 768, 864, 0, 480, 483, 486, 525, 0,
712 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@67Hz */
713 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 25200, 640, 656,
714 752, 800, 0, 480, 490, 492, 525, 0,
715 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@60Hz */
716 { DRM_MODE("720x400", DRM_MODE_TYPE_DRIVER, 35500, 720, 738,
717 846, 900, 0, 400, 421, 423, 449, 0,
718 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 720x400@88Hz */
719 { DRM_MODE("720x400", DRM_MODE_TYPE_DRIVER, 28320, 720, 738,
720 846, 900, 0, 400, 412, 414, 449, 0,
721 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 720x400@70Hz */
722 { DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 135000, 1280, 1296,
723 1440, 1688, 0, 1024, 1025, 1028, 1066, 0,
724 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 1280x1024@75Hz */
725 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 78800, 1024, 1040,
726 1136, 1312, 0, 768, 769, 772, 800, 0,
727 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 1024x768@75Hz */
728 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 75000, 1024, 1048,
729 1184, 1328, 0, 768, 771, 777, 806, 0,
730 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 1024x768@70Hz */
731 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 65000, 1024, 1048,
732 1184, 1344, 0, 768, 771, 777, 806, 0,
733 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 1024x768@60Hz */
734 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER,44900, 1024, 1032,
735 1208, 1264, 0, 768, 768, 776, 817, 0,
736 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC | DRM_MODE_FLAG_INTERLACE) }, /* 1024x768@43Hz */
737 { DRM_MODE("832x624", DRM_MODE_TYPE_DRIVER, 57284, 832, 864,
738 928, 1152, 0, 624, 625, 628, 667, 0,
739 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 832x624@75Hz */
740 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 49500, 800, 816,
741 896, 1056, 0, 600, 601, 604, 625, 0,
742 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@75Hz */
743 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 50000, 800, 856,
744 976, 1040, 0, 600, 637, 643, 666, 0,
745 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@72Hz */
746 { DRM_MODE("1152x864", DRM_MODE_TYPE_DRIVER, 108000, 1152, 1216,
747 1344, 1600, 0, 864, 865, 868, 900, 0,
748 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 1152x864@75Hz */
749 };
750
751 #define EDID_EST_TIMINGS 16
752 #define EDID_STD_TIMINGS 8
753 #define EDID_DETAILED_TIMINGS 4
754
755 /**
756 * add_established_modes - get est. modes from EDID and add them
757 * @edid: EDID block to scan
758 *
759 * Each EDID block contains a bitmap of the supported "established modes" list
760 * (defined above). Tease them out and add them to the global modes list.
761 */
762 static int add_established_modes(struct drm_connector *connector, struct edid *edid)
763 {
764 struct drm_device *dev = connector->dev;
765 unsigned long est_bits = edid->established_timings.t1 |
766 (edid->established_timings.t2 << 8) |
767 ((edid->established_timings.mfg_rsvd & 0x80) << 9);
768 int i, modes = 0;
769
770 for (i = 0; i <= EDID_EST_TIMINGS; i++)
771 if (est_bits & (1<<i)) {
772 struct drm_display_mode *newmode;
773 newmode = drm_mode_duplicate(dev, &edid_est_modes[i]);
774 if (newmode) {
775 drm_mode_probed_add(connector, newmode);
776 modes++;
777 }
778 }
779
780 return modes;
781 }
782 /**
783 * stanard_timing_level - get std. timing level(CVT/GTF/DMT)
784 * @edid: EDID block to scan
785 */
786 static int standard_timing_level(struct edid *edid)
787 {
788 if (edid->revision >= 2) {
789 if (edid->revision >= 4 && (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF))
790 return LEVEL_CVT;
791 return LEVEL_GTF;
792 }
793 return LEVEL_DMT;
794 }
795
796 /**
797 * add_standard_modes - get std. modes from EDID and add them
798 * @edid: EDID block to scan
799 *
800 * Standard modes can be calculated using the CVT standard. Grab them from
801 * @edid, calculate them, and add them to the list.
802 */
803 static int add_standard_modes(struct drm_connector *connector, struct edid *edid)
804 {
805 struct drm_device *dev = connector->dev;
806 int i, modes = 0;
807 int timing_level;
808
809 timing_level = standard_timing_level(edid);
810
811 for (i = 0; i < EDID_STD_TIMINGS; i++) {
812 struct std_timing *t = &edid->standard_timings[i];
813 struct drm_display_mode *newmode;
814
815 /* If std timings bytes are 1, 1 it's empty */
816 if (t->hsize == 1 && t->vfreq_aspect == 1)
817 continue;
818
819 newmode = drm_mode_std(dev, &edid->standard_timings[i],
820 edid->revision, timing_level);
821 if (newmode) {
822 drm_mode_probed_add(connector, newmode);
823 modes++;
824 }
825 }
826
827 return modes;
828 }
829
830 static int add_detailed_modes(struct drm_connector *connector,
831 struct detailed_timing *timing,
832 struct edid *edid, u32 quirks, int preferred)
833 {
834 int i, modes = 0;
835 struct detailed_non_pixel *data = &timing->data.other_data;
836 int timing_level = standard_timing_level(edid);
837 struct drm_display_mode *newmode;
838 struct drm_device *dev = connector->dev;
839
840 if (timing->pixel_clock) {
841 newmode = drm_mode_detailed(dev, edid, timing, quirks);
842 if (!newmode)
843 return 0;
844
845 if (preferred)
846 newmode->type |= DRM_MODE_TYPE_PREFERRED;
847
848 drm_mode_probed_add(connector, newmode);
849 return 1;
850 }
851
852 /* other timing types */
853 switch (data->type) {
854 case EDID_DETAIL_MONITOR_RANGE:
855 /* Get monitor range data */
856 break;
857 case EDID_DETAIL_STD_MODES:
858 /* Six modes per detailed section */
859 for (i = 0; i < 6; i++) {
860 struct std_timing *std;
861 struct drm_display_mode *newmode;
862
863 std = &data->data.timings[i];
864 newmode = drm_mode_std(dev, std, edid->revision,
865 timing_level);
866 if (newmode) {
867 drm_mode_probed_add(connector, newmode);
868 modes++;
869 }
870 }
871 break;
872 default:
873 break;
874 }
875
876 return modes;
877 }
878
879 /**
880 * add_detailed_info - get detailed mode info from EDID data
881 * @connector: attached connector
882 * @edid: EDID block to scan
883 * @quirks: quirks to apply
884 *
885 * Some of the detailed timing sections may contain mode information. Grab
886 * it and add it to the list.
887 */
888 static int add_detailed_info(struct drm_connector *connector,
889 struct edid *edid, u32 quirks)
890 {
891 int i, modes = 0;
892
893 for (i = 0; i < EDID_DETAILED_TIMINGS; i++) {
894 struct detailed_timing *timing = &edid->detailed_timings[i];
895 int preferred = (i == 0) && (edid->features & DRM_EDID_FEATURE_PREFERRED_TIMING);
896
897 /* In 1.0, only timings are allowed */
898 if (!timing->pixel_clock && edid->version == 1 &&
899 edid->revision == 0)
900 continue;
901
902 modes += add_detailed_modes(connector, timing, edid, quirks,
903 preferred);
904 }
905
906 return modes;
907 }
908
909 /**
910 * add_detailed_mode_eedid - get detailed mode info from addtional timing
911 * EDID block
912 * @connector: attached connector
913 * @edid: EDID block to scan(It is only to get addtional timing EDID block)
914 * @quirks: quirks to apply
915 *
916 * Some of the detailed timing sections may contain mode information. Grab
917 * it and add it to the list.
918 */
919 static int add_detailed_info_eedid(struct drm_connector *connector,
920 struct edid *edid, u32 quirks)
921 {
922 int i, modes = 0;
923 char *edid_ext = NULL;
924 struct detailed_timing *timing;
925 int edid_ext_num;
926 int start_offset, end_offset;
927 int timing_level;
928
929 if (edid->version == 1 && edid->revision < 3) {
930 /* If the EDID version is less than 1.3, there is no
931 * extension EDID.
932 */
933 return 0;
934 }
935 if (!edid->extensions) {
936 /* if there is no extension EDID, it is unnecessary to
937 * parse the E-EDID to get detailed info
938 */
939 return 0;
940 }
941
942 /* Chose real EDID extension number */
943 edid_ext_num = edid->extensions > MAX_EDID_EXT_NUM ?
944 MAX_EDID_EXT_NUM : edid->extensions;
945
946 /* Find CEA extension */
947 for (i = 0; i < edid_ext_num; i++) {
948 edid_ext = (char *)edid + EDID_LENGTH * (i + 1);
949 /* This block is CEA extension */
950 if (edid_ext[0] == 0x02)
951 break;
952 }
953
954 if (i == edid_ext_num) {
955 /* if there is no additional timing EDID block, return */
956 return 0;
957 }
958
959 /* Get the start offset of detailed timing block */
960 start_offset = edid_ext[2];
961 if (start_offset == 0) {
962 /* If the start_offset is zero, it means that neither detailed
963 * info nor data block exist. In such case it is also
964 * unnecessary to parse the detailed timing info.
965 */
966 return 0;
967 }
968
969 timing_level = standard_timing_level(edid);
970 end_offset = EDID_LENGTH;
971 end_offset -= sizeof(struct detailed_timing);
972 for (i = start_offset; i < end_offset;
973 i += sizeof(struct detailed_timing)) {
974 timing = (struct detailed_timing *)(edid_ext + i);
975 modes += add_detailed_modes(connector, timing, edid, quirks, 0);
976 }
977
978 return modes;
979 }
980
981 #define DDC_ADDR 0x50
982 /**
983 * Get EDID information via I2C.
984 *
985 * \param adapter : i2c device adaptor
986 * \param buf : EDID data buffer to be filled
987 * \param len : EDID data buffer length
988 * \return 0 on success or -1 on failure.
989 *
990 * Try to fetch EDID information by calling i2c driver function.
991 */
992 int drm_do_probe_ddc_edid(struct i2c_adapter *adapter,
993 unsigned char *buf, int len)
994 {
995 unsigned char start = 0x0;
996 struct i2c_msg msgs[] = {
997 {
998 .addr = DDC_ADDR,
999 .flags = 0,
1000 .len = 1,
1001 .buf = &start,
1002 }, {
1003 .addr = DDC_ADDR,
1004 .flags = I2C_M_RD,
1005 .len = len,
1006 .buf = buf,
1007 }
1008 };
1009
1010 if (i2c_transfer(adapter, msgs, 2) == 2)
1011 return 0;
1012
1013 return -1;
1014 }
1015 EXPORT_SYMBOL(drm_do_probe_ddc_edid);
1016
1017 static int drm_ddc_read_edid(struct drm_connector *connector,
1018 struct i2c_adapter *adapter,
1019 char *buf, int len)
1020 {
1021 int ret;
1022
1023 ret = drm_do_probe_ddc_edid(adapter, buf, len);
1024 if (ret != 0) {
1025 goto end;
1026 }
1027 if (!edid_is_valid((struct edid *)buf)) {
1028 dev_warn(&connector->dev->pdev->dev, "%s: EDID invalid.\n",
1029 drm_get_connector_name(connector));
1030 ret = -1;
1031 }
1032 end:
1033 return ret;
1034 }
1035
1036 /**
1037 * drm_get_edid - get EDID data, if available
1038 * @connector: connector we're probing
1039 * @adapter: i2c adapter to use for DDC
1040 *
1041 * Poke the given connector's i2c channel to grab EDID data if possible.
1042 *
1043 * Return edid data or NULL if we couldn't find any.
1044 */
1045 struct edid *drm_get_edid(struct drm_connector *connector,
1046 struct i2c_adapter *adapter)
1047 {
1048 int ret;
1049 struct edid *edid;
1050
1051 edid = kmalloc(EDID_LENGTH * (MAX_EDID_EXT_NUM + 1),
1052 GFP_KERNEL);
1053 if (edid == NULL) {
1054 dev_warn(&connector->dev->pdev->dev,
1055 "Failed to allocate EDID\n");
1056 goto end;
1057 }
1058
1059 /* Read first EDID block */
1060 ret = drm_ddc_read_edid(connector, adapter,
1061 (unsigned char *)edid, EDID_LENGTH);
1062 if (ret != 0)
1063 goto clean_up;
1064
1065 /* There are EDID extensions to be read */
1066 if (edid->extensions != 0) {
1067 int edid_ext_num = edid->extensions;
1068
1069 if (edid_ext_num > MAX_EDID_EXT_NUM) {
1070 dev_warn(&connector->dev->pdev->dev,
1071 "The number of extension(%d) is "
1072 "over max (%d), actually read number (%d)\n",
1073 edid_ext_num, MAX_EDID_EXT_NUM,
1074 MAX_EDID_EXT_NUM);
1075 /* Reset EDID extension number to be read */
1076 edid_ext_num = MAX_EDID_EXT_NUM;
1077 }
1078 /* Read EDID including extensions too */
1079 ret = drm_ddc_read_edid(connector, adapter, (char *)edid,
1080 EDID_LENGTH * (edid_ext_num + 1));
1081 if (ret != 0)
1082 goto clean_up;
1083
1084 }
1085
1086 connector->display_info.raw_edid = (char *)edid;
1087 goto end;
1088
1089 clean_up:
1090 kfree(edid);
1091 edid = NULL;
1092 end:
1093 return edid;
1094
1095 }
1096 EXPORT_SYMBOL(drm_get_edid);
1097
1098 #define HDMI_IDENTIFIER 0x000C03
1099 #define VENDOR_BLOCK 0x03
1100 /**
1101 * drm_detect_hdmi_monitor - detect whether monitor is hdmi.
1102 * @edid: monitor EDID information
1103 *
1104 * Parse the CEA extension according to CEA-861-B.
1105 * Return true if HDMI, false if not or unknown.
1106 */
1107 bool drm_detect_hdmi_monitor(struct edid *edid)
1108 {
1109 char *edid_ext = NULL;
1110 int i, hdmi_id, edid_ext_num;
1111 int start_offset, end_offset;
1112 bool is_hdmi = false;
1113
1114 /* No EDID or EDID extensions */
1115 if (edid == NULL || edid->extensions == 0)
1116 goto end;
1117
1118 /* Chose real EDID extension number */
1119 edid_ext_num = edid->extensions > MAX_EDID_EXT_NUM ?
1120 MAX_EDID_EXT_NUM : edid->extensions;
1121
1122 /* Find CEA extension */
1123 for (i = 0; i < edid_ext_num; i++) {
1124 edid_ext = (char *)edid + EDID_LENGTH * (i + 1);
1125 /* This block is CEA extension */
1126 if (edid_ext[0] == 0x02)
1127 break;
1128 }
1129
1130 if (i == edid_ext_num)
1131 goto end;
1132
1133 /* Data block offset in CEA extension block */
1134 start_offset = 4;
1135 end_offset = edid_ext[2];
1136
1137 /*
1138 * Because HDMI identifier is in Vendor Specific Block,
1139 * search it from all data blocks of CEA extension.
1140 */
1141 for (i = start_offset; i < end_offset;
1142 /* Increased by data block len */
1143 i += ((edid_ext[i] & 0x1f) + 1)) {
1144 /* Find vendor specific block */
1145 if ((edid_ext[i] >> 5) == VENDOR_BLOCK) {
1146 hdmi_id = edid_ext[i + 1] | (edid_ext[i + 2] << 8) |
1147 edid_ext[i + 3] << 16;
1148 /* Find HDMI identifier */
1149 if (hdmi_id == HDMI_IDENTIFIER)
1150 is_hdmi = true;
1151 break;
1152 }
1153 }
1154
1155 end:
1156 return is_hdmi;
1157 }
1158 EXPORT_SYMBOL(drm_detect_hdmi_monitor);
1159
1160 /**
1161 * drm_add_edid_modes - add modes from EDID data, if available
1162 * @connector: connector we're probing
1163 * @edid: edid data
1164 *
1165 * Add the specified modes to the connector's mode list.
1166 *
1167 * Return number of modes added or 0 if we couldn't find any.
1168 */
1169 int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid)
1170 {
1171 int num_modes = 0;
1172 u32 quirks;
1173
1174 if (edid == NULL) {
1175 return 0;
1176 }
1177 if (!edid_is_valid(edid)) {
1178 dev_warn(&connector->dev->pdev->dev, "%s: EDID invalid.\n",
1179 drm_get_connector_name(connector));
1180 return 0;
1181 }
1182
1183 quirks = edid_get_quirks(edid);
1184
1185 num_modes += add_established_modes(connector, edid);
1186 num_modes += add_standard_modes(connector, edid);
1187 num_modes += add_detailed_info(connector, edid, quirks);
1188 num_modes += add_detailed_info_eedid(connector, edid, quirks);
1189
1190 if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75))
1191 edid_fixup_preferred(connector, quirks);
1192
1193 connector->display_info.serration_vsync = (edid->input & DRM_EDID_INPUT_SERRATION_VSYNC) ? 1 : 0;
1194 connector->display_info.sync_on_green = (edid->input & DRM_EDID_INPUT_SYNC_ON_GREEN) ? 1 : 0;
1195 connector->display_info.composite_sync = (edid->input & DRM_EDID_INPUT_COMPOSITE_SYNC) ? 1 : 0;
1196 connector->display_info.separate_syncs = (edid->input & DRM_EDID_INPUT_SEPARATE_SYNCS) ? 1 : 0;
1197 connector->display_info.blank_to_black = (edid->input & DRM_EDID_INPUT_BLANK_TO_BLACK) ? 1 : 0;
1198 connector->display_info.video_level = (edid->input & DRM_EDID_INPUT_VIDEO_LEVEL) >> 5;
1199 connector->display_info.digital = (edid->input & DRM_EDID_INPUT_DIGITAL) ? 1 : 0;
1200 connector->display_info.width_mm = edid->width_cm * 10;
1201 connector->display_info.height_mm = edid->height_cm * 10;
1202 connector->display_info.gamma = edid->gamma;
1203 connector->display_info.gtf_supported = (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF) ? 1 : 0;
1204 connector->display_info.standard_color = (edid->features & DRM_EDID_FEATURE_STANDARD_COLOR) ? 1 : 0;
1205 connector->display_info.display_type = (edid->features & DRM_EDID_FEATURE_DISPLAY_TYPE) >> 3;
1206 connector->display_info.active_off_supported = (edid->features & DRM_EDID_FEATURE_PM_ACTIVE_OFF) ? 1 : 0;
1207 connector->display_info.suspend_supported = (edid->features & DRM_EDID_FEATURE_PM_SUSPEND) ? 1 : 0;
1208 connector->display_info.standby_supported = (edid->features & DRM_EDID_FEATURE_PM_STANDBY) ? 1 : 0;
1209 connector->display_info.gamma = edid->gamma;
1210
1211 return num_modes;
1212 }
1213 EXPORT_SYMBOL(drm_add_edid_modes);
1214
1215 /**
1216 * drm_add_modes_noedid - add modes for the connectors without EDID
1217 * @connector: connector we're probing
1218 * @hdisplay: the horizontal display limit
1219 * @vdisplay: the vertical display limit
1220 *
1221 * Add the specified modes to the connector's mode list. Only when the
1222 * hdisplay/vdisplay is not beyond the given limit, it will be added.
1223 *
1224 * Return number of modes added or 0 if we couldn't find any.
1225 */
1226 int drm_add_modes_noedid(struct drm_connector *connector,
1227 int hdisplay, int vdisplay)
1228 {
1229 int i, count, num_modes = 0;
1230 struct drm_display_mode *mode, *ptr;
1231 struct drm_device *dev = connector->dev;
1232
1233 count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
1234 if (hdisplay < 0)
1235 hdisplay = 0;
1236 if (vdisplay < 0)
1237 vdisplay = 0;
1238
1239 for (i = 0; i < count; i++) {
1240 ptr = &drm_dmt_modes[i];
1241 if (hdisplay && vdisplay) {
1242 /*
1243 * Only when two are valid, they will be used to check
1244 * whether the mode should be added to the mode list of
1245 * the connector.
1246 */
1247 if (ptr->hdisplay > hdisplay ||
1248 ptr->vdisplay > vdisplay)
1249 continue;
1250 }
1251 mode = drm_mode_duplicate(dev, ptr);
1252 if (mode) {
1253 drm_mode_probed_add(connector, mode);
1254 num_modes++;
1255 }
1256 }
1257 return num_modes;
1258 }
1259 EXPORT_SYMBOL(drm_add_modes_noedid);
Linux ARM platform port for MOXA ART SoC