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Linux 2.6.33-rc6
[cris-mirror.git] / drivers / gpu / drm / drm_edid.c
blobf665b05592f3ea878760de1651600ef4d73a35b1
1 /*
2 * Copyright (c) 2006 Luc Verhaegen (quirks list)
3 * Copyright (c) 2007-2008 Intel Corporation
4 * Jesse Barnes <jesse.barnes@intel.com>
5 *
6 * DDC probing routines (drm_ddc_read & drm_do_probe_ddc_edid) originally from
7 * FB layer.
8 * Copyright (C) 2006 Dennis Munsie <dmunsie@cecropia.com>
9 *
10 * Permission is hereby granted, free of charge, to any person obtaining a
11 * copy of this software and associated documentation files (the "Software"),
12 * to deal in the Software without restriction, including without limitation
13 * the rights to use, copy, modify, merge, publish, distribute, sub license,
14 * and/or sell copies of the Software, and to permit persons to whom the
15 * Software is furnished to do so, subject to the following conditions:
16 *
17 * The above copyright notice and this permission notice (including the
18 * next paragraph) shall be included in all copies or substantial portions
19 * of the Software.
20 *
21 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
22 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
23 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
24 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
25 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
26 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
27 * DEALINGS IN THE SOFTWARE.
28 */
29 #include <linux/kernel.h>
30 #include <linux/i2c.h>
31 #include <linux/i2c-algo-bit.h>
32 #include "drmP.h"
33 #include "drm_edid.h"
34
35 /*
36 * TODO:
37 * - support EDID 1.4 (incl. CE blocks)
38 */
39
40 /*
41 * EDID blocks out in the wild have a variety of bugs, try to collect
42 * them here (note that userspace may work around broken monitors first,
43 * but fixes should make their way here so that the kernel "just works"
44 * on as many displays as possible).
45 */
46
47 /* First detailed mode wrong, use largest 60Hz mode */
48 #define EDID_QUIRK_PREFER_LARGE_60 (1 << 0)
49 /* Reported 135MHz pixel clock is too high, needs adjustment */
50 #define EDID_QUIRK_135_CLOCK_TOO_HIGH (1 << 1)
51 /* Prefer the largest mode at 75 Hz */
52 #define EDID_QUIRK_PREFER_LARGE_75 (1 << 2)
53 /* Detail timing is in cm not mm */
54 #define EDID_QUIRK_DETAILED_IN_CM (1 << 3)
55 /* Detailed timing descriptors have bogus size values, so just take the
56 * maximum size and use that.
57 */
58 #define EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE (1 << 4)
59 /* Monitor forgot to set the first detailed is preferred bit. */
60 #define EDID_QUIRK_FIRST_DETAILED_PREFERRED (1 << 5)
61 /* use +hsync +vsync for detailed mode */
62 #define EDID_QUIRK_DETAILED_SYNC_PP (1 << 6)
63 /* define the number of Extension EDID block */
64 #define MAX_EDID_EXT_NUM 4
65
66 #define LEVEL_DMT 0
67 #define LEVEL_GTF 1
68 #define LEVEL_CVT 2
69
70 static struct edid_quirk {
71 char *vendor;
72 int product_id;
73 u32 quirks;
74 } edid_quirk_list[] = {
75 /* Acer AL1706 */
76 { "ACR", 44358, EDID_QUIRK_PREFER_LARGE_60 },
77 /* Acer F51 */
78 { "API", 0x7602, EDID_QUIRK_PREFER_LARGE_60 },
79 /* Unknown Acer */
80 { "ACR", 2423, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
81
82 /* Belinea 10 15 55 */
83 { "MAX", 1516, EDID_QUIRK_PREFER_LARGE_60 },
84 { "MAX", 0x77e, EDID_QUIRK_PREFER_LARGE_60 },
85
86 /* Envision Peripherals, Inc. EN-7100e */
87 { "EPI", 59264, EDID_QUIRK_135_CLOCK_TOO_HIGH },
88
89 /* Funai Electronics PM36B */
90 { "FCM", 13600, EDID_QUIRK_PREFER_LARGE_75 |
91 EDID_QUIRK_DETAILED_IN_CM },
92
93 /* LG Philips LCD LP154W01-A5 */
94 { "LPL", 0, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
95 { "LPL", 0x2a00, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
96
97 /* Philips 107p5 CRT */
98 { "PHL", 57364, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
99
100 /* Proview AY765C */
101 { "PTS", 765, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
102
103 /* Samsung SyncMaster 205BW. Note: irony */
104 { "SAM", 541, EDID_QUIRK_DETAILED_SYNC_PP },
105 /* Samsung SyncMaster 22[5-6]BW */
106 { "SAM", 596, EDID_QUIRK_PREFER_LARGE_60 },
107 { "SAM", 638, EDID_QUIRK_PREFER_LARGE_60 },
108 };
109
110
111 /* Valid EDID header has these bytes */
112 static const u8 edid_header[] = {
113 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00
114 };
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 */
124 static bool edid_is_valid(struct edid *edid)
125 {
126 int i, score = 0;
127 u8 csum = 0;
128 u8 *raw_edid = (u8 *)edid;
129
130 for (i = 0; i < sizeof(edid_header); i++)
131 if (raw_edid[i] == edid_header[i])
132 score++;
133
134 if (score == 8) ;
135 else if (score >= 6) {
136 DRM_DEBUG("Fixing EDID header, your hardware may be failing\n");
137 memcpy(raw_edid, edid_header, sizeof(edid_header));
138 } else
139 goto bad;
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 if (edid->version != 1) {
149 DRM_ERROR("EDID has major version %d, instead of 1\n", edid->version);
150 goto bad;
151 }
152
153 if (edid->revision > 4)
154 DRM_DEBUG("EDID minor > 4, assuming backward compatibility\n");
155
156 return 1;
157
158 bad:
159 if (raw_edid) {
160 DRM_ERROR("Raw EDID:\n");
161 print_hex_dump_bytes(KERN_ERR, DUMP_PREFIX_NONE, raw_edid, EDID_LENGTH);
162 printk("\n");
163 }
164 return 0;
165 }
166
167 /**
168 * edid_vendor - match a string against EDID's obfuscated vendor field
169 * @edid: EDID to match
170 * @vendor: vendor string
171 *
172 * Returns true if @vendor is in @edid, false otherwise
173 */
174 static bool edid_vendor(struct edid *edid, char *vendor)
175 {
176 char edid_vendor[3];
177
178 edid_vendor[0] = ((edid->mfg_id[0] & 0x7c) >> 2) + '@';
179 edid_vendor[1] = (((edid->mfg_id[0] & 0x3) << 3) |
180 ((edid->mfg_id[1] & 0xe0) >> 5)) + '@';
181 edid_vendor[2] = (edid->mfg_id[1] & 0x1f) + '@';
182
183 return !strncmp(edid_vendor, vendor, 3);
184 }
185
186 /**
187 * edid_get_quirks - return quirk flags for a given EDID
188 * @edid: EDID to process
189 *
190 * This tells subsequent routines what fixes they need to apply.
191 */
192 static u32 edid_get_quirks(struct edid *edid)
193 {
194 struct edid_quirk *quirk;
195 int i;
196
197 for (i = 0; i < ARRAY_SIZE(edid_quirk_list); i++) {
198 quirk = &edid_quirk_list[i];
199
200 if (edid_vendor(edid, quirk->vendor) &&
201 (EDID_PRODUCT_ID(edid) == quirk->product_id))
202 return quirk->quirks;
203 }
204
205 return 0;
206 }
207
208 #define MODE_SIZE(m) ((m)->hdisplay * (m)->vdisplay)
209 #define MODE_REFRESH_DIFF(m,r) (abs((m)->vrefresh - target_refresh))
210
211
212 /**
213 * edid_fixup_preferred - set preferred modes based on quirk list
214 * @connector: has mode list to fix up
215 * @quirks: quirks list
216 *
217 * Walk the mode list for @connector, clearing the preferred status
218 * on existing modes and setting it anew for the right mode ala @quirks.
219 */
220 static void edid_fixup_preferred(struct drm_connector *connector,
221 u32 quirks)
222 {
223 struct drm_display_mode *t, *cur_mode, *preferred_mode;
224 int target_refresh = 0;
225
226 if (list_empty(&connector->probed_modes))
227 return;
228
229 if (quirks & EDID_QUIRK_PREFER_LARGE_60)
230 target_refresh = 60;
231 if (quirks & EDID_QUIRK_PREFER_LARGE_75)
232 target_refresh = 75;
233
234 preferred_mode = list_first_entry(&connector->probed_modes,
235 struct drm_display_mode, head);
236
237 list_for_each_entry_safe(cur_mode, t, &connector->probed_modes, head) {
238 cur_mode->type &= ~DRM_MODE_TYPE_PREFERRED;
239
240 if (cur_mode == preferred_mode)
241 continue;
242
243 /* Largest mode is preferred */
244 if (MODE_SIZE(cur_mode) > MODE_SIZE(preferred_mode))
245 preferred_mode = cur_mode;
246
247 /* At a given size, try to get closest to target refresh */
248 if ((MODE_SIZE(cur_mode) == MODE_SIZE(preferred_mode)) &&
249 MODE_REFRESH_DIFF(cur_mode, target_refresh) <
250 MODE_REFRESH_DIFF(preferred_mode, target_refresh)) {
251 preferred_mode = cur_mode;
252 }
253 }
254
255 preferred_mode->type |= DRM_MODE_TYPE_PREFERRED;
256 }
257
258 /*
259 * Add the Autogenerated from the DMT spec.
260 * This table is copied from xfree86/modes/xf86EdidModes.c.
261 * But the mode with Reduced blank feature is deleted.
262 */
263 static struct drm_display_mode drm_dmt_modes[] = {
264 /* 640x350@85Hz */
265 { DRM_MODE("640x350", DRM_MODE_TYPE_DRIVER, 31500, 640, 672,
266 736, 832, 0, 350, 382, 385, 445, 0,
267 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC) },
268 /* 640x400@85Hz */
269 { DRM_MODE("640x400", DRM_MODE_TYPE_DRIVER, 31500, 640, 672,
270 736, 832, 0, 400, 401, 404, 445, 0,
271 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
272 /* 720x400@85Hz */
273 { DRM_MODE("720x400", DRM_MODE_TYPE_DRIVER, 35500, 720, 756,
274 828, 936, 0, 400, 401, 404, 446, 0,
275 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
276 /* 640x480@60Hz */
277 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 25175, 640, 656,
278 752, 800, 0, 480, 489, 492, 525, 0,
279 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
280 /* 640x480@72Hz */
281 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 664,
282 704, 832, 0, 480, 489, 492, 520, 0,
283 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
284 /* 640x480@75Hz */
285 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 656,
286 720, 840, 0, 480, 481, 484, 500, 0,
287 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
288 /* 640x480@85Hz */
289 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 36000, 640, 696,
290 752, 832, 0, 480, 481, 484, 509, 0,
291 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
292 /* 800x600@56Hz */
293 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 36000, 800, 824,
294 896, 1024, 0, 600, 601, 603, 625, 0,
295 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
296 /* 800x600@60Hz */
297 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 40000, 800, 840,
298 968, 1056, 0, 600, 601, 605, 628, 0,
299 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
300 /* 800x600@72Hz */
301 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 50000, 800, 856,
302 976, 1040, 0, 600, 637, 643, 666, 0,
303 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
304 /* 800x600@75Hz */
305 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 49500, 800, 816,
306 896, 1056, 0, 600, 601, 604, 625, 0,
307 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
308 /* 800x600@85Hz */
309 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 56250, 800, 832,
310 896, 1048, 0, 600, 601, 604, 631, 0,
311 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
312 /* 848x480@60Hz */
313 { DRM_MODE("848x480", DRM_MODE_TYPE_DRIVER, 33750, 848, 864,
314 976, 1088, 0, 480, 486, 494, 517, 0,
315 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
316 /* 1024x768@43Hz, interlace */
317 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 44900, 1024, 1032,
318 1208, 1264, 0, 768, 768, 772, 817, 0,
319 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC |
320 DRM_MODE_FLAG_INTERLACE) },
321 /* 1024x768@60Hz */
322 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 65000, 1024, 1048,
323 1184, 1344, 0, 768, 771, 777, 806, 0,
324 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
325 /* 1024x768@70Hz */
326 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 75000, 1024, 1048,
327 1184, 1328, 0, 768, 771, 777, 806, 0,
328 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
329 /* 1024x768@75Hz */
330 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 78750, 1024, 1040,
331 1136, 1312, 0, 768, 769, 772, 800, 0,
332 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
333 /* 1024x768@85Hz */
334 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 94500, 1024, 1072,
335 1072, 1376, 0, 768, 769, 772, 808, 0,
336 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
337 /* 1152x864@75Hz */
338 { DRM_MODE("1152x864", DRM_MODE_TYPE_DRIVER, 108000, 1152, 1216,
339 1344, 1600, 0, 864, 865, 868, 900, 0,
340 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
341 /* 1280x768@60Hz */
342 { DRM_MODE("1280x768", DRM_MODE_TYPE_DRIVER, 79500, 1280, 1344,
343 1472, 1664, 0, 768, 771, 778, 798, 0,
344 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
345 /* 1280x768@75Hz */
346 { DRM_MODE("1280x768", DRM_MODE_TYPE_DRIVER, 102250, 1280, 1360,
347 1488, 1696, 0, 768, 771, 778, 805, 0,
348 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC) },
349 /* 1280x768@85Hz */
350 { DRM_MODE("1280x768", DRM_MODE_TYPE_DRIVER, 117500, 1280, 1360,
351 1496, 1712, 0, 768, 771, 778, 809, 0,
352 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
353 /* 1280x800@60Hz */
354 { DRM_MODE("1280x800", DRM_MODE_TYPE_DRIVER, 83500, 1280, 1352,
355 1480, 1680, 0, 800, 803, 809, 831, 0,
356 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC) },
357 /* 1280x800@75Hz */
358 { DRM_MODE("1280x800", DRM_MODE_TYPE_DRIVER, 106500, 1280, 1360,
359 1488, 1696, 0, 800, 803, 809, 838, 0,
360 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
361 /* 1280x800@85Hz */
362 { DRM_MODE("1280x800", DRM_MODE_TYPE_DRIVER, 122500, 1280, 1360,
363 1496, 1712, 0, 800, 803, 809, 843, 0,
364 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
365 /* 1280x960@60Hz */
366 { DRM_MODE("1280x960", DRM_MODE_TYPE_DRIVER, 108000, 1280, 1376,
367 1488, 1800, 0, 960, 961, 964, 1000, 0,
368 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
369 /* 1280x960@85Hz */
370 { DRM_MODE("1280x960", DRM_MODE_TYPE_DRIVER, 148500, 1280, 1344,
371 1504, 1728, 0, 960, 961, 964, 1011, 0,
372 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
373 /* 1280x1024@60Hz */
374 { DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 108000, 1280, 1328,
375 1440, 1688, 0, 1024, 1025, 1028, 1066, 0,
376 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
377 /* 1280x1024@75Hz */
378 { DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 135000, 1280, 1296,
379 1440, 1688, 0, 1024, 1025, 1028, 1066, 0,
380 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
381 /* 1280x1024@85Hz */
382 { DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 157500, 1280, 1344,
383 1504, 1728, 0, 1024, 1025, 1028, 1072, 0,
384 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
385 /* 1360x768@60Hz */
386 { DRM_MODE("1360x768", DRM_MODE_TYPE_DRIVER, 85500, 1360, 1424,
387 1536, 1792, 0, 768, 771, 777, 795, 0,
388 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
389 /* 1440x1050@60Hz */
390 { DRM_MODE("1400x1050", DRM_MODE_TYPE_DRIVER, 121750, 1400, 1488,
391 1632, 1864, 0, 1050, 1053, 1057, 1089, 0,
392 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
393 /* 1440x1050@75Hz */
394 { DRM_MODE("1400x1050", DRM_MODE_TYPE_DRIVER, 156000, 1400, 1504,
395 1648, 1896, 0, 1050, 1053, 1057, 1099, 0,
396 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
397 /* 1440x1050@85Hz */
398 { DRM_MODE("1400x1050", DRM_MODE_TYPE_DRIVER, 179500, 1400, 1504,
399 1656, 1912, 0, 1050, 1053, 1057, 1105, 0,
400 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
401 /* 1440x900@60Hz */
402 { DRM_MODE("1440x900", DRM_MODE_TYPE_DRIVER, 106500, 1440, 1520,
403 1672, 1904, 0, 900, 903, 909, 934, 0,
404 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
405 /* 1440x900@75Hz */
406 { DRM_MODE("1440x900", DRM_MODE_TYPE_DRIVER, 136750, 1440, 1536,
407 1688, 1936, 0, 900, 903, 909, 942, 0,
408 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
409 /* 1440x900@85Hz */
410 { DRM_MODE("1440x900", DRM_MODE_TYPE_DRIVER, 157000, 1440, 1544,
411 1696, 1952, 0, 900, 903, 909, 948, 0,
412 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
413 /* 1600x1200@60Hz */
414 { DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 162000, 1600, 1664,
415 1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
416 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
417 /* 1600x1200@65Hz */
418 { DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 175500, 1600, 1664,
419 1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
420 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
421 /* 1600x1200@70Hz */
422 { DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 189000, 1600, 1664,
423 1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
424 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
425 /* 1600x1200@75Hz */
426 { DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 2025000, 1600, 1664,
427 1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
428 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
429 /* 1600x1200@85Hz */
430 { DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 229500, 1600, 1664,
431 1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
432 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
433 /* 1680x1050@60Hz */
434 { DRM_MODE("1680x1050", DRM_MODE_TYPE_DRIVER, 146250, 1680, 1784,
435 1960, 2240, 0, 1050, 1053, 1059, 1089, 0,
436 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
437 /* 1680x1050@75Hz */
438 { DRM_MODE("1680x1050", DRM_MODE_TYPE_DRIVER, 187000, 1680, 1800,
439 1976, 2272, 0, 1050, 1053, 1059, 1099, 0,
440 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
441 /* 1680x1050@85Hz */
442 { DRM_MODE("1680x1050", DRM_MODE_TYPE_DRIVER, 214750, 1680, 1808,
443 1984, 2288, 0, 1050, 1053, 1059, 1105, 0,
444 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
445 /* 1792x1344@60Hz */
446 { DRM_MODE("1792x1344", DRM_MODE_TYPE_DRIVER, 204750, 1792, 1920,
447 2120, 2448, 0, 1344, 1345, 1348, 1394, 0,
448 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
449 /* 1729x1344@75Hz */
450 { DRM_MODE("1792x1344", DRM_MODE_TYPE_DRIVER, 261000, 1792, 1888,
451 2104, 2456, 0, 1344, 1345, 1348, 1417, 0,
452 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
453 /* 1853x1392@60Hz */
454 { DRM_MODE("1856x1392", DRM_MODE_TYPE_DRIVER, 218250, 1856, 1952,
455 2176, 2528, 0, 1392, 1393, 1396, 1439, 0,
456 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
457 /* 1856x1392@75Hz */
458 { DRM_MODE("1856x1392", DRM_MODE_TYPE_DRIVER, 288000, 1856, 1984,
459 2208, 2560, 0, 1392, 1395, 1399, 1500, 0,
460 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
461 /* 1920x1200@60Hz */
462 { DRM_MODE("1920x1200", DRM_MODE_TYPE_DRIVER, 193250, 1920, 2056,
463 2256, 2592, 0, 1200, 1203, 1209, 1245, 0,
464 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
465 /* 1920x1200@75Hz */
466 { DRM_MODE("1920x1200", DRM_MODE_TYPE_DRIVER, 245250, 1920, 2056,
467 2264, 2608, 0, 1200, 1203, 1209, 1255, 0,
468 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
469 /* 1920x1200@85Hz */
470 { DRM_MODE("1920x1200", DRM_MODE_TYPE_DRIVER, 281250, 1920, 2064,
471 2272, 2624, 0, 1200, 1203, 1209, 1262, 0,
472 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
473 /* 1920x1440@60Hz */
474 { DRM_MODE("1920x1440", DRM_MODE_TYPE_DRIVER, 234000, 1920, 2048,
475 2256, 2600, 0, 1440, 1441, 1444, 1500, 0,
476 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
477 /* 1920x1440@75Hz */
478 { DRM_MODE("1920x1440", DRM_MODE_TYPE_DRIVER, 297000, 1920, 2064,
479 2288, 2640, 0, 1440, 1441, 1444, 1500, 0,
480 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
481 /* 2560x1600@60Hz */
482 { DRM_MODE("2560x1600", DRM_MODE_TYPE_DRIVER, 348500, 2560, 2752,
483 3032, 3504, 0, 1600, 1603, 1609, 1658, 0,
484 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
485 /* 2560x1600@75HZ */
486 { DRM_MODE("2560x1600", DRM_MODE_TYPE_DRIVER, 443250, 2560, 2768,
487 3048, 3536, 0, 1600, 1603, 1609, 1672, 0,
488 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
489 /* 2560x1600@85HZ */
490 { DRM_MODE("2560x1600", DRM_MODE_TYPE_DRIVER, 505250, 2560, 2768,
491 3048, 3536, 0, 1600, 1603, 1609, 1682, 0,
492 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
493 };
494 static const int drm_num_dmt_modes =
495 sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
496
497 static struct drm_display_mode *drm_find_dmt(struct drm_device *dev,
498 int hsize, int vsize, int fresh)
499 {
500 int i;
501 struct drm_display_mode *ptr, *mode;
502
503 mode = NULL;
504 for (i = 0; i < drm_num_dmt_modes; i++) {
505 ptr = &drm_dmt_modes[i];
506 if (hsize == ptr->hdisplay &&
507 vsize == ptr->vdisplay &&
508 fresh == drm_mode_vrefresh(ptr)) {
509 /* get the expected default mode */
510 mode = drm_mode_duplicate(dev, ptr);
511 break;
512 }
513 }
514 return mode;
515 }
516
517 /*
518 * 0 is reserved. The spec says 0x01 fill for unused timings. Some old
519 * monitors fill with ascii space (0x20) instead.
520 */
521 static int
522 bad_std_timing(u8 a, u8 b)
523 {
524 return (a == 0x00 && b == 0x00) ||
525 (a == 0x01 && b == 0x01) ||
526 (a == 0x20 && b == 0x20);
527 }
528
529 /**
530 * drm_mode_std - convert standard mode info (width, height, refresh) into mode
531 * @t: standard timing params
532 * @timing_level: standard timing level
533 *
534 * Take the standard timing params (in this case width, aspect, and refresh)
535 * and convert them into a real mode using CVT/GTF/DMT.
536 *
537 * Punts for now, but should eventually use the FB layer's CVT based mode
538 * generation code.
539 */
540 struct drm_display_mode *drm_mode_std(struct drm_device *dev,
541 struct std_timing *t,
542 int revision,
543 int timing_level)
544 {
545 struct drm_display_mode *mode;
546 int hsize, vsize;
547 int vrefresh_rate;
548 unsigned aspect_ratio = (t->vfreq_aspect & EDID_TIMING_ASPECT_MASK)
549 >> EDID_TIMING_ASPECT_SHIFT;
550 unsigned vfreq = (t->vfreq_aspect & EDID_TIMING_VFREQ_MASK)
551 >> EDID_TIMING_VFREQ_SHIFT;
552
553 if (bad_std_timing(t->hsize, t->vfreq_aspect))
554 return NULL;
555
556 /* According to the EDID spec, the hdisplay = hsize * 8 + 248 */
557 hsize = t->hsize * 8 + 248;
558 /* vrefresh_rate = vfreq + 60 */
559 vrefresh_rate = vfreq + 60;
560 /* the vdisplay is calculated based on the aspect ratio */
561 if (aspect_ratio == 0) {
562 if (revision < 3)
563 vsize = hsize;
564 else
565 vsize = (hsize * 10) / 16;
566 } else if (aspect_ratio == 1)
567 vsize = (hsize * 3) / 4;
568 else if (aspect_ratio == 2)
569 vsize = (hsize * 4) / 5;
570 else
571 vsize = (hsize * 9) / 16;
572 /* HDTV hack */
573 if (hsize == 1360 && vsize == 765 && vrefresh_rate == 60) {
574 mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0,
575 false);
576 mode->hdisplay = 1366;
577 mode->vsync_start = mode->vsync_start - 1;
578 mode->vsync_end = mode->vsync_end - 1;
579 return mode;
580 }
581 mode = NULL;
582 /* check whether it can be found in default mode table */
583 mode = drm_find_dmt(dev, hsize, vsize, vrefresh_rate);
584 if (mode)
585 return mode;
586
587 switch (timing_level) {
588 case LEVEL_DMT:
589 break;
590 case LEVEL_GTF:
591 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
592 break;
593 case LEVEL_CVT:
594 mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0,
595 false);
596 break;
597 }
598 return mode;
599 }
600
601 /**
602 * drm_mode_detailed - create a new mode from an EDID detailed timing section
603 * @dev: DRM device (needed to create new mode)
604 * @edid: EDID block
605 * @timing: EDID detailed timing info
606 * @quirks: quirks to apply
607 *
608 * An EDID detailed timing block contains enough info for us to create and
609 * return a new struct drm_display_mode.
610 */
611 static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev,
612 struct edid *edid,
613 struct detailed_timing *timing,
614 u32 quirks)
615 {
616 struct drm_display_mode *mode;
617 struct detailed_pixel_timing *pt = &timing->data.pixel_data;
618 unsigned hactive = (pt->hactive_hblank_hi & 0xf0) << 4 | pt->hactive_lo;
619 unsigned vactive = (pt->vactive_vblank_hi & 0xf0) << 4 | pt->vactive_lo;
620 unsigned hblank = (pt->hactive_hblank_hi & 0xf) << 8 | pt->hblank_lo;
621 unsigned vblank = (pt->vactive_vblank_hi & 0xf) << 8 | pt->vblank_lo;
622 unsigned hsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc0) << 2 | pt->hsync_offset_lo;
623 unsigned hsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x30) << 4 | pt->hsync_pulse_width_lo;
624 unsigned vsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc) >> 2 | pt->vsync_offset_pulse_width_lo >> 4;
625 unsigned vsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x3) << 4 | (pt->vsync_offset_pulse_width_lo & 0xf);
626
627 /* ignore tiny modes */
628 if (hactive < 64 || vactive < 64)
629 return NULL;
630
631 if (pt->misc & DRM_EDID_PT_STEREO) {
632 printk(KERN_WARNING "stereo mode not supported\n");
633 return NULL;
634 }
635 if (!(pt->misc & DRM_EDID_PT_SEPARATE_SYNC)) {
636 printk(KERN_WARNING "composite sync not supported\n");
637 }
638
639 /* it is incorrect if hsync/vsync width is zero */
640 if (!hsync_pulse_width || !vsync_pulse_width) {
641 DRM_DEBUG_KMS("Incorrect Detailed timing. "
642 "Wrong Hsync/Vsync pulse width\n");
643 return NULL;
644 }
645 mode = drm_mode_create(dev);
646 if (!mode)
647 return NULL;
648
649 mode->type = DRM_MODE_TYPE_DRIVER;
650
651 if (quirks & EDID_QUIRK_135_CLOCK_TOO_HIGH)
652 timing->pixel_clock = cpu_to_le16(1088);
653
654 mode->clock = le16_to_cpu(timing->pixel_clock) * 10;
655
656 mode->hdisplay = hactive;
657 mode->hsync_start = mode->hdisplay + hsync_offset;
658 mode->hsync_end = mode->hsync_start + hsync_pulse_width;
659 mode->htotal = mode->hdisplay + hblank;
660
661 mode->vdisplay = vactive;
662 mode->vsync_start = mode->vdisplay + vsync_offset;
663 mode->vsync_end = mode->vsync_start + vsync_pulse_width;
664 mode->vtotal = mode->vdisplay + vblank;
665
666 /* perform the basic check for the detailed timing */
667 if (mode->hsync_end > mode->htotal ||
668 mode->vsync_end > mode->vtotal) {
669 drm_mode_destroy(dev, mode);
670 DRM_DEBUG_KMS("Incorrect detailed timing. "
671 "Sync is beyond the blank.\n");
672 return NULL;
673 }
674
675 /* Some EDIDs have bogus h/vtotal values */
676 if (mode->hsync_end > mode->htotal)
677 mode->htotal = mode->hsync_end + 1;
678 if (mode->vsync_end > mode->vtotal)
679 mode->vtotal = mode->vsync_end + 1;
680
681 drm_mode_set_name(mode);
682
683 if (pt->misc & DRM_EDID_PT_INTERLACED)
684 mode->flags |= DRM_MODE_FLAG_INTERLACE;
685
686 if (quirks & EDID_QUIRK_DETAILED_SYNC_PP) {
687 pt->misc |= DRM_EDID_PT_HSYNC_POSITIVE | DRM_EDID_PT_VSYNC_POSITIVE;
688 }
689
690 mode->flags |= (pt->misc & DRM_EDID_PT_HSYNC_POSITIVE) ?
691 DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC;
692 mode->flags |= (pt->misc & DRM_EDID_PT_VSYNC_POSITIVE) ?
693 DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC;
694
695 mode->width_mm = pt->width_mm_lo | (pt->width_height_mm_hi & 0xf0) << 4;
696 mode->height_mm = pt->height_mm_lo | (pt->width_height_mm_hi & 0xf) << 8;
697
698 if (quirks & EDID_QUIRK_DETAILED_IN_CM) {
699 mode->width_mm *= 10;
700 mode->height_mm *= 10;
701 }
702
703 if (quirks & EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE) {
704 mode->width_mm = edid->width_cm * 10;
705 mode->height_mm = edid->height_cm * 10;
706 }
707
708 return mode;
709 }
710
711 /*
712 * Detailed mode info for the EDID "established modes" data to use.
713 */
714 static struct drm_display_mode edid_est_modes[] = {
715 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 40000, 800, 840,
716 968, 1056, 0, 600, 601, 605, 628, 0,
717 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@60Hz */
718 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 36000, 800, 824,
719 896, 1024, 0, 600, 601, 603, 625, 0,
720 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@56Hz */
721 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 656,
722 720, 840, 0, 480, 481, 484, 500, 0,
723 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@75Hz */
724 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 664,
725 704, 832, 0, 480, 489, 491, 520, 0,
726 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@72Hz */
727 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 30240, 640, 704,
728 768, 864, 0, 480, 483, 486, 525, 0,
729 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@67Hz */
730 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 25200, 640, 656,
731 752, 800, 0, 480, 490, 492, 525, 0,
732 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@60Hz */
733 { DRM_MODE("720x400", DRM_MODE_TYPE_DRIVER, 35500, 720, 738,
734 846, 900, 0, 400, 421, 423, 449, 0,
735 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 720x400@88Hz */
736 { DRM_MODE("720x400", DRM_MODE_TYPE_DRIVER, 28320, 720, 738,
737 846, 900, 0, 400, 412, 414, 449, 0,
738 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 720x400@70Hz */
739 { DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 135000, 1280, 1296,
740 1440, 1688, 0, 1024, 1025, 1028, 1066, 0,
741 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 1280x1024@75Hz */
742 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 78800, 1024, 1040,
743 1136, 1312, 0, 768, 769, 772, 800, 0,
744 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 1024x768@75Hz */
745 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 75000, 1024, 1048,
746 1184, 1328, 0, 768, 771, 777, 806, 0,
747 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 1024x768@70Hz */
748 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 65000, 1024, 1048,
749 1184, 1344, 0, 768, 771, 777, 806, 0,
750 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 1024x768@60Hz */
751 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER,44900, 1024, 1032,
752 1208, 1264, 0, 768, 768, 776, 817, 0,
753 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC | DRM_MODE_FLAG_INTERLACE) }, /* 1024x768@43Hz */
754 { DRM_MODE("832x624", DRM_MODE_TYPE_DRIVER, 57284, 832, 864,
755 928, 1152, 0, 624, 625, 628, 667, 0,
756 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 832x624@75Hz */
757 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 49500, 800, 816,
758 896, 1056, 0, 600, 601, 604, 625, 0,
759 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@75Hz */
760 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 50000, 800, 856,
761 976, 1040, 0, 600, 637, 643, 666, 0,
762 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@72Hz */
763 { DRM_MODE("1152x864", DRM_MODE_TYPE_DRIVER, 108000, 1152, 1216,
764 1344, 1600, 0, 864, 865, 868, 900, 0,
765 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 1152x864@75Hz */
766 };
767
768 #define EDID_EST_TIMINGS 16
769 #define EDID_STD_TIMINGS 8
770 #define EDID_DETAILED_TIMINGS 4
771
772 /**
773 * add_established_modes - get est. modes from EDID and add them
774 * @edid: EDID block to scan
775 *
776 * Each EDID block contains a bitmap of the supported "established modes" list
777 * (defined above). Tease them out and add them to the global modes list.
778 */
779 static int add_established_modes(struct drm_connector *connector, struct edid *edid)
780 {
781 struct drm_device *dev = connector->dev;
782 unsigned long est_bits = edid->established_timings.t1 |
783 (edid->established_timings.t2 << 8) |
784 ((edid->established_timings.mfg_rsvd & 0x80) << 9);
785 int i, modes = 0;
786
787 for (i = 0; i <= EDID_EST_TIMINGS; i++)
788 if (est_bits & (1<<i)) {
789 struct drm_display_mode *newmode;
790 newmode = drm_mode_duplicate(dev, &edid_est_modes[i]);
791 if (newmode) {
792 drm_mode_probed_add(connector, newmode);
793 modes++;
794 }
795 }
796
797 return modes;
798 }
799 /**
800 * stanard_timing_level - get std. timing level(CVT/GTF/DMT)
801 * @edid: EDID block to scan
802 */
803 static int standard_timing_level(struct edid *edid)
804 {
805 if (edid->revision >= 2) {
806 if (edid->revision >= 4 && (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF))
807 return LEVEL_CVT;
808 return LEVEL_GTF;
809 }
810 return LEVEL_DMT;
811 }
812
813 /**
814 * add_standard_modes - get std. modes from EDID and add them
815 * @edid: EDID block to scan
816 *
817 * Standard modes can be calculated using the CVT standard. Grab them from
818 * @edid, calculate them, and add them to the list.
819 */
820 static int add_standard_modes(struct drm_connector *connector, struct edid *edid)
821 {
822 struct drm_device *dev = connector->dev;
823 int i, modes = 0;
824 int timing_level;
825
826 timing_level = standard_timing_level(edid);
827
828 for (i = 0; i < EDID_STD_TIMINGS; i++) {
829 struct std_timing *t = &edid->standard_timings[i];
830 struct drm_display_mode *newmode;
831
832 /* If std timings bytes are 1, 1 it's empty */
833 if (t->hsize == 1 && t->vfreq_aspect == 1)
834 continue;
835
836 newmode = drm_mode_std(dev, &edid->standard_timings[i],
837 edid->revision, timing_level);
838 if (newmode) {
839 drm_mode_probed_add(connector, newmode);
840 modes++;
841 }
842 }
843
844 return modes;
845 }
846
847 /*
848 * XXX fix this for:
849 * - GTF secondary curve formula
850 * - EDID 1.4 range offsets
851 * - CVT extended bits
852 */
853 static bool
854 mode_in_range(struct drm_display_mode *mode, struct detailed_timing *timing)
855 {
856 struct detailed_data_monitor_range *range;
857 int hsync, vrefresh;
858
859 range = &timing->data.other_data.data.range;
860
861 hsync = drm_mode_hsync(mode);
862 vrefresh = drm_mode_vrefresh(mode);
863
864 if (hsync < range->min_hfreq_khz || hsync > range->max_hfreq_khz)
865 return false;
866
867 if (vrefresh < range->min_vfreq || vrefresh > range->max_vfreq)
868 return false;
869
870 if (range->pixel_clock_mhz && range->pixel_clock_mhz != 0xff) {
871 /* be forgiving since it's in units of 10MHz */
872 int max_clock = range->pixel_clock_mhz * 10 + 9;
873 max_clock *= 1000;
874 if (mode->clock > max_clock)
875 return false;
876 }
877
878 return true;
879 }
880
881 /*
882 * XXX If drm_dmt_modes ever regrows the CVT-R modes (and it will) this will
883 * need to account for them.
884 */
885 static int drm_gtf_modes_for_range(struct drm_connector *connector,
886 struct detailed_timing *timing)
887 {
888 int i, modes = 0;
889 struct drm_display_mode *newmode;
890 struct drm_device *dev = connector->dev;
891
892 for (i = 0; i < drm_num_dmt_modes; i++) {
893 if (mode_in_range(drm_dmt_modes + i, timing)) {
894 newmode = drm_mode_duplicate(dev, &drm_dmt_modes[i]);
895 if (newmode) {
896 drm_mode_probed_add(connector, newmode);
897 modes++;
898 }
899 }
900 }
901
902 return modes;
903 }
904
905 static int drm_cvt_modes(struct drm_connector *connector,
906 struct detailed_timing *timing)
907 {
908 int i, j, modes = 0;
909 struct drm_display_mode *newmode;
910 struct drm_device *dev = connector->dev;
911 struct cvt_timing *cvt;
912 const int rates[] = { 60, 85, 75, 60, 50 };
913 const u8 empty[3] = { 0, 0, 0 };
914
915 for (i = 0; i < 4; i++) {
916 int uninitialized_var(width), height;
917 cvt = &(timing->data.other_data.data.cvt[i]);
918
919 if (!memcmp(cvt->code, empty, 3))
920 continue;
921
922 height = (cvt->code[0] + ((cvt->code[1] & 0xf0) << 4) + 1) * 2;
923 switch (cvt->code[1] & 0x0c) {
924 case 0x00:
925 width = height * 4 / 3;
926 break;
927 case 0x04:
928 width = height * 16 / 9;
929 break;
930 case 0x08:
931 width = height * 16 / 10;
932 break;
933 case 0x0c:
934 width = height * 15 / 9;
935 break;
936 }
937
938 for (j = 1; j < 5; j++) {
939 if (cvt->code[2] & (1 << j)) {
940 newmode = drm_cvt_mode(dev, width, height,
941 rates[j], j == 0,
942 false, false);
943 if (newmode) {
944 drm_mode_probed_add(connector, newmode);
945 modes++;
946 }
947 }
948 }
949 }
950
951 return modes;
952 }
953
954 static int add_detailed_modes(struct drm_connector *connector,
955 struct detailed_timing *timing,
956 struct edid *edid, u32 quirks, int preferred)
957 {
958 int i, modes = 0;
959 struct detailed_non_pixel *data = &timing->data.other_data;
960 int timing_level = standard_timing_level(edid);
961 int gtf = (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF);
962 struct drm_display_mode *newmode;
963 struct drm_device *dev = connector->dev;
964
965 if (timing->pixel_clock) {
966 newmode = drm_mode_detailed(dev, edid, timing, quirks);
967 if (!newmode)
968 return 0;
969
970 if (preferred)
971 newmode->type |= DRM_MODE_TYPE_PREFERRED;
972
973 drm_mode_probed_add(connector, newmode);
974 return 1;
975 }
976
977 /* other timing types */
978 switch (data->type) {
979 case EDID_DETAIL_MONITOR_RANGE:
980 if (gtf)
981 modes += drm_gtf_modes_for_range(connector, timing);
982 break;
983 case EDID_DETAIL_STD_MODES:
984 /* Six modes per detailed section */
985 for (i = 0; i < 6; i++) {
986 struct std_timing *std;
987 struct drm_display_mode *newmode;
988
989 std = &data->data.timings[i];
990 newmode = drm_mode_std(dev, std, edid->revision,
991 timing_level);
992 if (newmode) {
993 drm_mode_probed_add(connector, newmode);
994 modes++;
995 }
996 }
997 break;
998 case EDID_DETAIL_CVT_3BYTE:
999 modes += drm_cvt_modes(connector, timing);
1000 break;
1001 default:
1002 break;
1003 }
1004
1005 return modes;
1006 }
1007
1008 /**
1009 * add_detailed_info - get detailed mode info from EDID data
1010 * @connector: attached connector
1011 * @edid: EDID block to scan
1012 * @quirks: quirks to apply
1013 *
1014 * Some of the detailed timing sections may contain mode information. Grab
1015 * it and add it to the list.
1016 */
1017 static int add_detailed_info(struct drm_connector *connector,
1018 struct edid *edid, u32 quirks)
1019 {
1020 int i, modes = 0;
1021
1022 for (i = 0; i < EDID_DETAILED_TIMINGS; i++) {
1023 struct detailed_timing *timing = &edid->detailed_timings[i];
1024 int preferred = (i == 0) && (edid->features & DRM_EDID_FEATURE_PREFERRED_TIMING);
1025
1026 /* In 1.0, only timings are allowed */
1027 if (!timing->pixel_clock && edid->version == 1 &&
1028 edid->revision == 0)
1029 continue;
1030
1031 modes += add_detailed_modes(connector, timing, edid, quirks,
1032 preferred);
1033 }
1034
1035 return modes;
1036 }
1037
1038 /**
1039 * add_detailed_mode_eedid - get detailed mode info from addtional timing
1040 * EDID block
1041 * @connector: attached connector
1042 * @edid: EDID block to scan(It is only to get addtional timing EDID block)
1043 * @quirks: quirks to apply
1044 *
1045 * Some of the detailed timing sections may contain mode information. Grab
1046 * it and add it to the list.
1047 */
1048 static int add_detailed_info_eedid(struct drm_connector *connector,
1049 struct edid *edid, u32 quirks)
1050 {
1051 int i, modes = 0;
1052 char *edid_ext = NULL;
1053 struct detailed_timing *timing;
1054 int edid_ext_num;
1055 int start_offset, end_offset;
1056 int timing_level;
1057
1058 if (edid->version == 1 && edid->revision < 3) {
1059 /* If the EDID version is less than 1.3, there is no
1060 * extension EDID.
1061 */
1062 return 0;
1063 }
1064 if (!edid->extensions) {
1065 /* if there is no extension EDID, it is unnecessary to
1066 * parse the E-EDID to get detailed info
1067 */
1068 return 0;
1069 }
1070
1071 /* Chose real EDID extension number */
1072 edid_ext_num = edid->extensions > MAX_EDID_EXT_NUM ?
1073 MAX_EDID_EXT_NUM : edid->extensions;
1074
1075 /* Find CEA extension */
1076 for (i = 0; i < edid_ext_num; i++) {
1077 edid_ext = (char *)edid + EDID_LENGTH * (i + 1);
1078 /* This block is CEA extension */
1079 if (edid_ext[0] == 0x02)
1080 break;
1081 }
1082
1083 if (i == edid_ext_num) {
1084 /* if there is no additional timing EDID block, return */
1085 return 0;
1086 }
1087
1088 /* Get the start offset of detailed timing block */
1089 start_offset = edid_ext[2];
1090 if (start_offset == 0) {
1091 /* If the start_offset is zero, it means that neither detailed
1092 * info nor data block exist. In such case it is also
1093 * unnecessary to parse the detailed timing info.
1094 */
1095 return 0;
1096 }
1097
1098 timing_level = standard_timing_level(edid);
1099 end_offset = EDID_LENGTH;
1100 end_offset -= sizeof(struct detailed_timing);
1101 for (i = start_offset; i < end_offset;
1102 i += sizeof(struct detailed_timing)) {
1103 timing = (struct detailed_timing *)(edid_ext + i);
1104 modes += add_detailed_modes(connector, timing, edid, quirks, 0);
1105 }
1106
1107 return modes;
1108 }
1109
1110 #define DDC_ADDR 0x50
1111 /**
1112 * Get EDID information via I2C.
1113 *
1114 * \param adapter : i2c device adaptor
1115 * \param buf : EDID data buffer to be filled
1116 * \param len : EDID data buffer length
1117 * \return 0 on success or -1 on failure.
1118 *
1119 * Try to fetch EDID information by calling i2c driver function.
1120 */
1121 int drm_do_probe_ddc_edid(struct i2c_adapter *adapter,
1122 unsigned char *buf, int len)
1123 {
1124 unsigned char start = 0x0;
1125 struct i2c_msg msgs[] = {
1126 {
1127 .addr = DDC_ADDR,
1128 .flags = 0,
1129 .len = 1,
1130 .buf = &start,
1131 }, {
1132 .addr = DDC_ADDR,
1133 .flags = I2C_M_RD,
1134 .len = len,
1135 .buf = buf,
1136 }
1137 };
1138
1139 if (i2c_transfer(adapter, msgs, 2) == 2)
1140 return 0;
1141
1142 return -1;
1143 }
1144 EXPORT_SYMBOL(drm_do_probe_ddc_edid);
1145
1146 static int drm_ddc_read_edid(struct drm_connector *connector,
1147 struct i2c_adapter *adapter,
1148 char *buf, int len)
1149 {
1150 int i;
1151
1152 for (i = 0; i < 4; i++) {
1153 if (drm_do_probe_ddc_edid(adapter, buf, len))
1154 return -1;
1155 if (edid_is_valid((struct edid *)buf))
1156 return 0;
1157 }
1158
1159 /* repeated checksum failures; warn, but carry on */
1160 dev_warn(&connector->dev->pdev->dev, "%s: EDID invalid.\n",
1161 drm_get_connector_name(connector));
1162 return -1;
1163 }
1164
1165 /**
1166 * drm_get_edid - get EDID data, if available
1167 * @connector: connector we're probing
1168 * @adapter: i2c adapter to use for DDC
1169 *
1170 * Poke the given connector's i2c channel to grab EDID data if possible.
1171 *
1172 * Return edid data or NULL if we couldn't find any.
1173 */
1174 struct edid *drm_get_edid(struct drm_connector *connector,
1175 struct i2c_adapter *adapter)
1176 {
1177 int ret;
1178 struct edid *edid;
1179
1180 edid = kmalloc(EDID_LENGTH * (MAX_EDID_EXT_NUM + 1),
1181 GFP_KERNEL);
1182 if (edid == NULL) {
1183 dev_warn(&connector->dev->pdev->dev,
1184 "Failed to allocate EDID\n");
1185 goto end;
1186 }
1187
1188 /* Read first EDID block */
1189 ret = drm_ddc_read_edid(connector, adapter,
1190 (unsigned char *)edid, EDID_LENGTH);
1191 if (ret != 0)
1192 goto clean_up;
1193
1194 /* There are EDID extensions to be read */
1195 if (edid->extensions != 0) {
1196 int edid_ext_num = edid->extensions;
1197
1198 if (edid_ext_num > MAX_EDID_EXT_NUM) {
1199 dev_warn(&connector->dev->pdev->dev,
1200 "The number of extension(%d) is "
1201 "over max (%d), actually read number (%d)\n",
1202 edid_ext_num, MAX_EDID_EXT_NUM,
1203 MAX_EDID_EXT_NUM);
1204 /* Reset EDID extension number to be read */
1205 edid_ext_num = MAX_EDID_EXT_NUM;
1206 }
1207 /* Read EDID including extensions too */
1208 ret = drm_ddc_read_edid(connector, adapter, (char *)edid,
1209 EDID_LENGTH * (edid_ext_num + 1));
1210 if (ret != 0)
1211 goto clean_up;
1212
1213 }
1214
1215 connector->display_info.raw_edid = (char *)edid;
1216 goto end;
1217
1218 clean_up:
1219 kfree(edid);
1220 edid = NULL;
1221 end:
1222 return edid;
1223
1224 }
1225 EXPORT_SYMBOL(drm_get_edid);
1226
1227 #define HDMI_IDENTIFIER 0x000C03
1228 #define VENDOR_BLOCK 0x03
1229 /**
1230 * drm_detect_hdmi_monitor - detect whether monitor is hdmi.
1231 * @edid: monitor EDID information
1232 *
1233 * Parse the CEA extension according to CEA-861-B.
1234 * Return true if HDMI, false if not or unknown.
1235 */
1236 bool drm_detect_hdmi_monitor(struct edid *edid)
1237 {
1238 char *edid_ext = NULL;
1239 int i, hdmi_id, edid_ext_num;
1240 int start_offset, end_offset;
1241 bool is_hdmi = false;
1242
1243 /* No EDID or EDID extensions */
1244 if (edid == NULL || edid->extensions == 0)
1245 goto end;
1246
1247 /* Chose real EDID extension number */
1248 edid_ext_num = edid->extensions > MAX_EDID_EXT_NUM ?
1249 MAX_EDID_EXT_NUM : edid->extensions;
1250
1251 /* Find CEA extension */
1252 for (i = 0; i < edid_ext_num; i++) {
1253 edid_ext = (char *)edid + EDID_LENGTH * (i + 1);
1254 /* This block is CEA extension */
1255 if (edid_ext[0] == 0x02)
1256 break;
1257 }
1258
1259 if (i == edid_ext_num)
1260 goto end;
1261
1262 /* Data block offset in CEA extension block */
1263 start_offset = 4;
1264 end_offset = edid_ext[2];
1265
1266 /*
1267 * Because HDMI identifier is in Vendor Specific Block,
1268 * search it from all data blocks of CEA extension.
1269 */
1270 for (i = start_offset; i < end_offset;
1271 /* Increased by data block len */
1272 i += ((edid_ext[i] & 0x1f) + 1)) {
1273 /* Find vendor specific block */
1274 if ((edid_ext[i] >> 5) == VENDOR_BLOCK) {
1275 hdmi_id = edid_ext[i + 1] | (edid_ext[i + 2] << 8) |
1276 edid_ext[i + 3] << 16;
1277 /* Find HDMI identifier */
1278 if (hdmi_id == HDMI_IDENTIFIER)
1279 is_hdmi = true;
1280 break;
1281 }
1282 }
1283
1284 end:
1285 return is_hdmi;
1286 }
1287 EXPORT_SYMBOL(drm_detect_hdmi_monitor);
1288
1289 /**
1290 * drm_add_edid_modes - add modes from EDID data, if available
1291 * @connector: connector we're probing
1292 * @edid: edid data
1293 *
1294 * Add the specified modes to the connector's mode list.
1295 *
1296 * Return number of modes added or 0 if we couldn't find any.
1297 */
1298 int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid)
1299 {
1300 int num_modes = 0;
1301 u32 quirks;
1302
1303 if (edid == NULL) {
1304 return 0;
1305 }
1306 if (!edid_is_valid(edid)) {
1307 dev_warn(&connector->dev->pdev->dev, "%s: EDID invalid.\n",
1308 drm_get_connector_name(connector));
1309 return 0;
1310 }
1311
1312 quirks = edid_get_quirks(edid);
1313
1314 num_modes += add_established_modes(connector, edid);
1315 num_modes += add_standard_modes(connector, edid);
1316 num_modes += add_detailed_info(connector, edid, quirks);
1317 num_modes += add_detailed_info_eedid(connector, edid, quirks);
1318
1319 if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75))
1320 edid_fixup_preferred(connector, quirks);
1321
1322 connector->display_info.serration_vsync = (edid->input & DRM_EDID_INPUT_SERRATION_VSYNC) ? 1 : 0;
1323 connector->display_info.sync_on_green = (edid->input & DRM_EDID_INPUT_SYNC_ON_GREEN) ? 1 : 0;
1324 connector->display_info.composite_sync = (edid->input & DRM_EDID_INPUT_COMPOSITE_SYNC) ? 1 : 0;
1325 connector->display_info.separate_syncs = (edid->input & DRM_EDID_INPUT_SEPARATE_SYNCS) ? 1 : 0;
1326 connector->display_info.blank_to_black = (edid->input & DRM_EDID_INPUT_BLANK_TO_BLACK) ? 1 : 0;
1327 connector->display_info.video_level = (edid->input & DRM_EDID_INPUT_VIDEO_LEVEL) >> 5;
1328 connector->display_info.digital = (edid->input & DRM_EDID_INPUT_DIGITAL) ? 1 : 0;
1329 connector->display_info.width_mm = edid->width_cm * 10;
1330 connector->display_info.height_mm = edid->height_cm * 10;
1331 connector->display_info.gamma = edid->gamma;
1332 connector->display_info.gtf_supported = (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF) ? 1 : 0;
1333 connector->display_info.standard_color = (edid->features & DRM_EDID_FEATURE_STANDARD_COLOR) ? 1 : 0;
1334 connector->display_info.display_type = (edid->features & DRM_EDID_FEATURE_DISPLAY_TYPE) >> 3;
1335 connector->display_info.active_off_supported = (edid->features & DRM_EDID_FEATURE_PM_ACTIVE_OFF) ? 1 : 0;
1336 connector->display_info.suspend_supported = (edid->features & DRM_EDID_FEATURE_PM_SUSPEND) ? 1 : 0;
1337 connector->display_info.standby_supported = (edid->features & DRM_EDID_FEATURE_PM_STANDBY) ? 1 : 0;
1338 connector->display_info.gamma = edid->gamma;
1339
1340 return num_modes;
1341 }
1342 EXPORT_SYMBOL(drm_add_edid_modes);
1343
1344 /**
1345 * drm_add_modes_noedid - add modes for the connectors without EDID
1346 * @connector: connector we're probing
1347 * @hdisplay: the horizontal display limit
1348 * @vdisplay: the vertical display limit
1349 *
1350 * Add the specified modes to the connector's mode list. Only when the
1351 * hdisplay/vdisplay is not beyond the given limit, it will be added.
1352 *
1353 * Return number of modes added or 0 if we couldn't find any.
1354 */
1355 int drm_add_modes_noedid(struct drm_connector *connector,
1356 int hdisplay, int vdisplay)
1357 {
1358 int i, count, num_modes = 0;
1359 struct drm_display_mode *mode, *ptr;
1360 struct drm_device *dev = connector->dev;
1361
1362 count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
1363 if (hdisplay < 0)
1364 hdisplay = 0;
1365 if (vdisplay < 0)
1366 vdisplay = 0;
1367
1368 for (i = 0; i < count; i++) {
1369 ptr = &drm_dmt_modes[i];
1370 if (hdisplay && vdisplay) {
1371 /*
1372 * Only when two are valid, they will be used to check
1373 * whether the mode should be added to the mode list of
1374 * the connector.
1375 */
1376 if (ptr->hdisplay > hdisplay ||
1377 ptr->vdisplay > vdisplay)
1378 continue;
1379 }
1380 if (drm_mode_vrefresh(ptr) > 61)
1381 continue;
1382 mode = drm_mode_duplicate(dev, ptr);
1383 if (mode) {
1384 drm_mode_probed_add(connector, mode);
1385 num_modes++;
1386 }
1387 }
1388 return num_modes;
1389 }
1390 EXPORT_SYMBOL(drm_add_modes_noedid);
CRIS linux kernel tree