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[thirdparty/kernel/stable.git] / drivers / gpu / drm / drm_edid.c
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f453ba04
DA		 1/*
2 * Copyright (c) 2006 Luc Verhaegen (quirks list)
3 * Copyright (c) 2007-2008 Intel Corporation
4 * Jesse Barnes <jesse.barnes@intel.com>
5 *
6 * DDC probing routines (drm_ddc_read & drm_do_probe_ddc_edid) originally from
7 * FB layer.
8 * Copyright (C) 2006 Dennis Munsie <dmunsie@cecropia.com>
9 *
10 * Permission is hereby granted, free of charge, to any person obtaining a
11 * copy of this software and associated documentation files (the "Software"),
12 * to deal in the Software without restriction, including without limitation
13 * the rights to use, copy, modify, merge, publish, distribute, sub license,
14 * and/or sell copies of the Software, and to permit persons to whom the
15 * Software is furnished to do so, subject to the following conditions:
16 *
17 * The above copyright notice and this permission notice (including the
18 * next paragraph) shall be included in all copies or substantial portions
19 * of the Software.
20 *
21 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
22 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
23 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
24 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
25 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
26 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
27 * DEALINGS IN THE SOFTWARE.
28 */
29#include <linux/kernel.h>
30#include <linux/i2c.h>
31#include <linux/i2c-algo-bit.h>
32#include "drmP.h"
33#include "drm_edid.h"
34
35/*
36 * TODO:
37 * - support EDID 1.4 (incl. CE blocks)
38 */
39
40/*
41 * EDID blocks out in the wild have a variety of bugs, try to collect
42 * them here (note that userspace may work around broken monitors first,
43 * but fixes should make their way here so that the kernel "just works"
44 * on as many displays as possible).
45 */
46
47/* First detailed mode wrong, use largest 60Hz mode */
48#define EDID_QUIRK_PREFER_LARGE_60 (1 << 0)
49/* Reported 135MHz pixel clock is too high, needs adjustment */
50#define EDID_QUIRK_135_CLOCK_TOO_HIGH (1 << 1)
51/* Prefer the largest mode at 75 Hz */
52#define EDID_QUIRK_PREFER_LARGE_75 (1 << 2)
53/* Detail timing is in cm not mm */
54#define EDID_QUIRK_DETAILED_IN_CM (1 << 3)
55/* Detailed timing descriptors have bogus size values, so just take the
56 * maximum size and use that.
57 */
58#define EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE (1 << 4)
59/* Monitor forgot to set the first detailed is preferred bit. */
60#define EDID_QUIRK_FIRST_DETAILED_PREFERRED (1 << 5)
61/* use +hsync +vsync for detailed mode */
62#define EDID_QUIRK_DETAILED_SYNC_PP (1 << 6)
3c537889 63
f453ba04 64
5c61259e
ZY		 65#define LEVEL_DMT 0
66#define LEVEL_GTF 1
67#define LEVEL_CVT 2
68
f453ba04
DA		 69static struct edid_quirk {
70 char *vendor;
71 int product_id;
72 u32 quirks;
73} edid_quirk_list[] = {
74 /* Acer AL1706 */
75 { "ACR", 44358, EDID_QUIRK_PREFER_LARGE_60 },
76 /* Acer F51 */
77 { "API", 0x7602, EDID_QUIRK_PREFER_LARGE_60 },
78 /* Unknown Acer */
79 { "ACR", 2423, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
80
81 /* Belinea 10 15 55 */
82 { "MAX", 1516, EDID_QUIRK_PREFER_LARGE_60 },
83 { "MAX", 0x77e, EDID_QUIRK_PREFER_LARGE_60 },
84
85 /* Envision Peripherals, Inc. EN-7100e */
86 { "EPI", 59264, EDID_QUIRK_135_CLOCK_TOO_HIGH },
87
88 /* Funai Electronics PM36B */
89 { "FCM", 13600, EDID_QUIRK_PREFER_LARGE_75 |
90 EDID_QUIRK_DETAILED_IN_CM },
91
92 /* LG Philips LCD LP154W01-A5 */
93 { "LPL", 0, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
94 { "LPL", 0x2a00, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
95
96 /* Philips 107p5 CRT */
97 { "PHL", 57364, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
98
99 /* Proview AY765C */
100 { "PTS", 765, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
101
102 /* Samsung SyncMaster 205BW. Note: irony */
103 { "SAM", 541, EDID_QUIRK_DETAILED_SYNC_PP },
104 /* Samsung SyncMaster 22[5-6]BW */
105 { "SAM", 596, EDID_QUIRK_PREFER_LARGE_60 },
106 { "SAM", 638, EDID_QUIRK_PREFER_LARGE_60 },
107};
108
109
110/* Valid EDID header has these bytes */
083ae056
AJ		 111static const u8 edid_header[] = {
112 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00
113};
f453ba04
DA		 114
115/**
3c537889 116 * drm_edid_is_valid - sanity check EDID data
f453ba04
DA		 117 * @edid: EDID data
118 *
119 * Sanity check the EDID block by looking at the header, the version number
120 * and the checksum. Return 0 if the EDID doesn't check out, or 1 if it's
121 * valid.
122 */
3c537889 123bool drm_edid_is_valid(struct edid *edid)
f453ba04 124{
862b89c0 125 int i, score = 0;
f453ba04
DA		 126 u8 csum = 0;
127 u8 *raw_edid = (u8 *)edid;
128
862b89c0
AJ		 129 for (i = 0; i < sizeof(edid_header); i++)
130 if (raw_edid[i] == edid_header[i])
131 score++;
132
133 if (score == 8) ;
134 else if (score >= 6) {
135 DRM_DEBUG("Fixing EDID header, your hardware may be failing\n");
136 memcpy(raw_edid, edid_header, sizeof(edid_header));
137 } else
f453ba04 138 goto bad;
f453ba04
DA		 139
140 for (i = 0; i < EDID_LENGTH; i++)
141 csum += raw_edid[i];
142 if (csum) {
143 DRM_ERROR("EDID checksum is invalid, remainder is %d\n", csum);
144 goto bad;
145 }
146
862b89c0
AJ		 147 if (edid->version != 1) {
148 DRM_ERROR("EDID has major version %d, instead of 1\n", edid->version);
149 goto bad;
150 }
151
47ee4ccf
AJ		 152 if (edid->revision > 4)
153 DRM_DEBUG("EDID minor > 4, assuming backward compatibility\n");
154
f453ba04
DA		 155 return 1;
156
157bad:
158 if (raw_edid) {
159 DRM_ERROR("Raw EDID:\n");
160 print_hex_dump_bytes(KERN_ERR, DUMP_PREFIX_NONE, raw_edid, EDID_LENGTH);
161 printk("\n");
162 }
163 return 0;
164}
3c537889 165EXPORT_SYMBOL(drm_edid_is_valid);
f453ba04
DA		 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 */
174static 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)) + '@';
16456c87 181 edid_vendor[2] = (edid->mfg_id[1] & 0x1f) + '@';
f453ba04
DA		 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 */
192static 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 */
220static void edid_fixup_preferred(struct drm_connector *connector,
221 u32 quirks)
222{
223 struct drm_display_mode *t, *cur_mode, *preferred_mode;
f890607b 224 int target_refresh = 0;
f453ba04
DA		 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
aa9eaa1f
ZY		 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 */
263static 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};
07a5e632
AJ		 494static const int drm_num_dmt_modes =
495 sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
aa9eaa1f 496
559ee21d
ZY		 497static struct drm_display_mode *drm_find_dmt(struct drm_device *dev,
498 int hsize, int vsize, int fresh)
499{
07a5e632 500 int i;
559ee21d
ZY		 501 struct drm_display_mode *ptr, *mode;
502
559ee21d 503 mode = NULL;
07a5e632 504 for (i = 0; i < drm_num_dmt_modes; i++) {
559ee21d
ZY		 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}
23425cae
AJ		 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 */
521static int
522bad_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
f453ba04
DA		 529/**
530 * drm_mode_std - convert standard mode info (width, height, refresh) into mode
531 * @t: standard timing params
5c61259e 532 * @timing_level: standard timing level
f453ba04
DA		 533 *
534 * Take the standard timing params (in this case width, aspect, and refresh)
5c61259e 535 * and convert them into a real mode using CVT/GTF/DMT.
f453ba04
DA		 536 *
537 * Punts for now, but should eventually use the FB layer's CVT based mode
538 * generation code.
539 */
540struct drm_display_mode *drm_mode_std(struct drm_device *dev,
5c61259e 541 struct std_timing *t,
f066a17d 542 int revision,
5c61259e 543 int timing_level)
f453ba04
DA		 544{
545 struct drm_display_mode *mode;
5c61259e
ZY		 546 int hsize, vsize;
547 int vrefresh_rate;
0454beab
MD		 548 unsigned aspect_ratio = (t->vfreq_aspect & EDID_TIMING_ASPECT_MASK)
549 >> EDID_TIMING_ASPECT_SHIFT;
5c61259e
ZY		 550 unsigned vfreq = (t->vfreq_aspect & EDID_TIMING_VFREQ_MASK)
551 >> EDID_TIMING_VFREQ_SHIFT;
552
23425cae
AJ		 553 if (bad_std_timing(t->hsize, t->vfreq_aspect))
554 return NULL;
555
5c61259e
ZY		 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 */
f066a17d
AJ		 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)
f453ba04 567 vsize = (hsize * 3) / 4;
0454beab 568 else if (aspect_ratio == 2)
f453ba04
DA		 569 vsize = (hsize * 4) / 5;
570 else
571 vsize = (hsize * 9) / 16;
559ee21d
ZY		 572 /* HDTV hack */
573 if (hsize == 1360 && vsize == 765 && vrefresh_rate == 60) {
d50ba256
DA		 574 mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0,
575 false);
559ee21d
ZY		 576 mode->hdisplay = 1366;
577 mode->vsync_start = mode->vsync_start - 1;
578 mode->vsync_end = mode->vsync_end - 1;
579 return mode;
580 }
5c61259e 581 mode = NULL;
559ee21d
ZY		 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
5c61259e
ZY		 587 switch (timing_level) {
588 case LEVEL_DMT:
5c61259e
ZY		 589 break;
590 case LEVEL_GTF:
591 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
592 break;
593 case LEVEL_CVT:
d50ba256
DA		 594 mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0,
595 false);
5c61259e
ZY		 596 break;
597 }
f453ba04
DA		 598 return mode;
599}
600
b58db2c6
AJ		 601/*
602 * EDID is delightfully ambiguous about how interlaced modes are to be
603 * encoded. Our internal representation is of frame height, but some
604 * HDTV detailed timings are encoded as field height.
605 *
606 * The format list here is from CEA, in frame size. Technically we
607 * should be checking refresh rate too. Whatever.
608 */
609static void
610drm_mode_do_interlace_quirk(struct drm_display_mode *mode,
611 struct detailed_pixel_timing *pt)
612{
613 int i;
614 static const struct {
615 int w, h;
616 } cea_interlaced[] = {
617 { 1920, 1080 },
618 { 720, 480 },
619 { 1440, 480 },
620 { 2880, 480 },
621 { 720, 576 },
622 { 1440, 576 },
623 { 2880, 576 },
624 };
625 static const int n_sizes =
626 sizeof(cea_interlaced)/sizeof(cea_interlaced[0]);
627
628 if (!(pt->misc & DRM_EDID_PT_INTERLACED))
629 return;
630
631 for (i = 0; i < n_sizes; i++) {
632 if ((mode->hdisplay == cea_interlaced[i].w) &&
633 (mode->vdisplay == cea_interlaced[i].h / 2)) {
634 mode->vdisplay *= 2;
635 mode->vsync_start *= 2;
636 mode->vsync_end *= 2;
637 mode->vtotal *= 2;
638 mode->vtotal |= 1;
639 }
640 }
641
642 mode->flags |= DRM_MODE_FLAG_INTERLACE;
643}
644
f453ba04
DA		 645/**
646 * drm_mode_detailed - create a new mode from an EDID detailed timing section
647 * @dev: DRM device (needed to create new mode)
648 * @edid: EDID block
649 * @timing: EDID detailed timing info
650 * @quirks: quirks to apply
651 *
652 * An EDID detailed timing block contains enough info for us to create and
653 * return a new struct drm_display_mode.
654 */
655static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev,
656 struct edid *edid,
657 struct detailed_timing *timing,
658 u32 quirks)
659{
660 struct drm_display_mode *mode;
661 struct detailed_pixel_timing *pt = &timing->data.pixel_data;
0454beab
MD		 662 unsigned hactive = (pt->hactive_hblank_hi & 0xf0) << 4 | pt->hactive_lo;
663 unsigned vactive = (pt->vactive_vblank_hi & 0xf0) << 4 | pt->vactive_lo;
664 unsigned hblank = (pt->hactive_hblank_hi & 0xf) << 8 | pt->hblank_lo;
665 unsigned vblank = (pt->vactive_vblank_hi & 0xf) << 8 | pt->vblank_lo;
e14cbee4
MD		 666 unsigned hsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc0) << 2 | pt->hsync_offset_lo;
667 unsigned hsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x30) << 4 | pt->hsync_pulse_width_lo;
668 unsigned vsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc) >> 2 | pt->vsync_offset_pulse_width_lo >> 4;
669 unsigned vsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x3) << 4 | (pt->vsync_offset_pulse_width_lo & 0xf);
f453ba04 670
fc438966 671 /* ignore tiny modes */
0454beab 672 if (hactive < 64 || vactive < 64)
fc438966
AJ		 673 return NULL;
674
0454beab 675 if (pt->misc & DRM_EDID_PT_STEREO) {
f453ba04
DA		 676 printk(KERN_WARNING "stereo mode not supported\n");
677 return NULL;
678 }
0454beab 679 if (!(pt->misc & DRM_EDID_PT_SEPARATE_SYNC)) {
79b7dcb2 680 printk(KERN_WARNING "composite sync not supported\n");
f453ba04
DA		 681 }
682
fcb45611
ZY		 683 /* it is incorrect if hsync/vsync width is zero */
684 if (!hsync_pulse_width || !vsync_pulse_width) {
685 DRM_DEBUG_KMS("Incorrect Detailed timing. "
686 "Wrong Hsync/Vsync pulse width\n");
687 return NULL;
688 }
f453ba04
DA		 689 mode = drm_mode_create(dev);
690 if (!mode)
691 return NULL;
692
693 mode->type = DRM_MODE_TYPE_DRIVER;
694
695 if (quirks & EDID_QUIRK_135_CLOCK_TOO_HIGH)
0454beab
MD		 696 timing->pixel_clock = cpu_to_le16(1088);
697
698 mode->clock = le16_to_cpu(timing->pixel_clock) * 10;
699
700 mode->hdisplay = hactive;
701 mode->hsync_start = mode->hdisplay + hsync_offset;
702 mode->hsync_end = mode->hsync_start + hsync_pulse_width;
703 mode->htotal = mode->hdisplay + hblank;
704
705 mode->vdisplay = vactive;
706 mode->vsync_start = mode->vdisplay + vsync_offset;
707 mode->vsync_end = mode->vsync_start + vsync_pulse_width;
708 mode->vtotal = mode->vdisplay + vblank;
f453ba04 709
7064fef5
JB		 710 /* Some EDIDs have bogus h/vtotal values */
711 if (mode->hsync_end > mode->htotal)
712 mode->htotal = mode->hsync_end + 1;
713 if (mode->vsync_end > mode->vtotal)
714 mode->vtotal = mode->vsync_end + 1;
715
f453ba04
DA		 716 drm_mode_set_name(mode);
717
b58db2c6 718 drm_mode_do_interlace_quirk(mode, pt);
f453ba04
DA		 719
720 if (quirks & EDID_QUIRK_DETAILED_SYNC_PP) {
0454beab 721 pt->misc |= DRM_EDID_PT_HSYNC_POSITIVE | DRM_EDID_PT_VSYNC_POSITIVE;
f453ba04
DA		 722 }
723
0454beab
MD		 724 mode->flags |= (pt->misc & DRM_EDID_PT_HSYNC_POSITIVE) ?
725 DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC;
726 mode->flags |= (pt->misc & DRM_EDID_PT_VSYNC_POSITIVE) ?
727 DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC;
f453ba04 728
e14cbee4
MD		 729 mode->width_mm = pt->width_mm_lo | (pt->width_height_mm_hi & 0xf0) << 4;
730 mode->height_mm = pt->height_mm_lo | (pt->width_height_mm_hi & 0xf) << 8;
f453ba04
DA		 731
732 if (quirks & EDID_QUIRK_DETAILED_IN_CM) {
733 mode->width_mm *= 10;
734 mode->height_mm *= 10;
735 }
736
737 if (quirks & EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE) {
738 mode->width_mm = edid->width_cm * 10;
739 mode->height_mm = edid->height_cm * 10;
740 }
741
742 return mode;
743}
744
745/*
746 * Detailed mode info for the EDID "established modes" data to use.
747 */
748static struct drm_display_mode edid_est_modes[] = {
749 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 40000, 800, 840,
750 968, 1056, 0, 600, 601, 605, 628, 0,
751 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@60Hz */
752 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 36000, 800, 824,
753 896, 1024, 0, 600, 601, 603, 625, 0,
754 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@56Hz */
755 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 656,
756 720, 840, 0, 480, 481, 484, 500, 0,
757 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@75Hz */
758 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 664,
759 704, 832, 0, 480, 489, 491, 520, 0,
760 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@72Hz */
761 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 30240, 640, 704,
762 768, 864, 0, 480, 483, 486, 525, 0,
763 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@67Hz */
764 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 25200, 640, 656,
765 752, 800, 0, 480, 490, 492, 525, 0,
766 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@60Hz */
767 { DRM_MODE("720x400", DRM_MODE_TYPE_DRIVER, 35500, 720, 738,
768 846, 900, 0, 400, 421, 423, 449, 0,
769 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 720x400@88Hz */
770 { DRM_MODE("720x400", DRM_MODE_TYPE_DRIVER, 28320, 720, 738,
771 846, 900, 0, 400, 412, 414, 449, 0,
772 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 720x400@70Hz */
773 { DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 135000, 1280, 1296,
774 1440, 1688, 0, 1024, 1025, 1028, 1066, 0,
775 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 1280x1024@75Hz */
776 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 78800, 1024, 1040,
777 1136, 1312, 0, 768, 769, 772, 800, 0,
778 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 1024x768@75Hz */
779 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 75000, 1024, 1048,
780 1184, 1328, 0, 768, 771, 777, 806, 0,
781 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 1024x768@70Hz */
782 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 65000, 1024, 1048,
783 1184, 1344, 0, 768, 771, 777, 806, 0,
784 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 1024x768@60Hz */
785 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER,44900, 1024, 1032,
786 1208, 1264, 0, 768, 768, 776, 817, 0,
787 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC | DRM_MODE_FLAG_INTERLACE) }, /* 1024x768@43Hz */
788 { DRM_MODE("832x624", DRM_MODE_TYPE_DRIVER, 57284, 832, 864,
789 928, 1152, 0, 624, 625, 628, 667, 0,
790 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 832x624@75Hz */
791 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 49500, 800, 816,
792 896, 1056, 0, 600, 601, 604, 625, 0,
793 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@75Hz */
794 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 50000, 800, 856,
795 976, 1040, 0, 600, 637, 643, 666, 0,
796 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@72Hz */
797 { DRM_MODE("1152x864", DRM_MODE_TYPE_DRIVER, 108000, 1152, 1216,
798 1344, 1600, 0, 864, 865, 868, 900, 0,
799 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 1152x864@75Hz */
800};
801
802#define EDID_EST_TIMINGS 16
803#define EDID_STD_TIMINGS 8
804#define EDID_DETAILED_TIMINGS 4
805
806/**
807 * add_established_modes - get est. modes from EDID and add them
808 * @edid: EDID block to scan
809 *
810 * Each EDID block contains a bitmap of the supported "established modes" list
811 * (defined above). Tease them out and add them to the global modes list.
812 */
813static int add_established_modes(struct drm_connector *connector, struct edid *edid)
814{
815 struct drm_device *dev = connector->dev;
816 unsigned long est_bits = edid->established_timings.t1 |
817 (edid->established_timings.t2 << 8) |
818 ((edid->established_timings.mfg_rsvd & 0x80) << 9);
819 int i, modes = 0;
820
821 for (i = 0; i <= EDID_EST_TIMINGS; i++)
822 if (est_bits & (1<<i)) {
823 struct drm_display_mode *newmode;
824 newmode = drm_mode_duplicate(dev, &edid_est_modes[i]);
825 if (newmode) {
826 drm_mode_probed_add(connector, newmode);
827 modes++;
828 }
829 }
830
831 return modes;
832}
5c61259e
ZY		 833/**
834 * stanard_timing_level - get std. timing level(CVT/GTF/DMT)
835 * @edid: EDID block to scan
836 */
837static int standard_timing_level(struct edid *edid)
838{
839 if (edid->revision >= 2) {
840 if (edid->revision >= 4 && (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF))
841 return LEVEL_CVT;
842 return LEVEL_GTF;
843 }
844 return LEVEL_DMT;
845}
f453ba04
DA		 846
847/**
848 * add_standard_modes - get std. modes from EDID and add them
849 * @edid: EDID block to scan
850 *
851 * Standard modes can be calculated using the CVT standard. Grab them from
852 * @edid, calculate them, and add them to the list.
853 */
854static int add_standard_modes(struct drm_connector *connector, struct edid *edid)
855{
856 struct drm_device *dev = connector->dev;
857 int i, modes = 0;
5c61259e
ZY		 858 int timing_level;
859
860 timing_level = standard_timing_level(edid);
f453ba04
DA		 861
862 for (i = 0; i < EDID_STD_TIMINGS; i++) {
863 struct std_timing *t = &edid->standard_timings[i];
864 struct drm_display_mode *newmode;
865
866 /* If std timings bytes are 1, 1 it's empty */
0454beab 867 if (t->hsize == 1 && t->vfreq_aspect == 1)
f453ba04
DA		 868 continue;
869
5c61259e 870 newmode = drm_mode_std(dev, &edid->standard_timings[i],
f066a17d 871 edid->revision, timing_level);
f453ba04
DA		 872 if (newmode) {
873 drm_mode_probed_add(connector, newmode);
874 modes++;
875 }
876 }
877
878 return modes;
879}
880
07a5e632
AJ		 881/*
882 * XXX fix this for:
883 * - GTF secondary curve formula
884 * - EDID 1.4 range offsets
885 * - CVT extended bits
886 */
887static bool
888mode_in_range(struct drm_display_mode *mode, struct detailed_timing *timing)
889{
890 struct detailed_data_monitor_range *range;
891 int hsync, vrefresh;
892
893 range = &timing->data.other_data.data.range;
894
895 hsync = drm_mode_hsync(mode);
896 vrefresh = drm_mode_vrefresh(mode);
897
898 if (hsync < range->min_hfreq_khz || hsync > range->max_hfreq_khz)
899 return false;
900
901 if (vrefresh < range->min_vfreq || vrefresh > range->max_vfreq)
902 return false;
903
904 if (range->pixel_clock_mhz && range->pixel_clock_mhz != 0xff) {
905 /* be forgiving since it's in units of 10MHz */
906 int max_clock = range->pixel_clock_mhz * 10 + 9;
907 max_clock *= 1000;
908 if (mode->clock > max_clock)
909 return false;
910 }
911
912 return true;
913}
914
915/*
916 * XXX If drm_dmt_modes ever regrows the CVT-R modes (and it will) this will
917 * need to account for them.
918 */
919static int drm_gtf_modes_for_range(struct drm_connector *connector,
920 struct detailed_timing *timing)
921{
922 int i, modes = 0;
923 struct drm_display_mode *newmode;
924 struct drm_device *dev = connector->dev;
925
926 for (i = 0; i < drm_num_dmt_modes; i++) {
927 if (mode_in_range(drm_dmt_modes + i, timing)) {
928 newmode = drm_mode_duplicate(dev, &drm_dmt_modes[i]);
929 if (newmode) {
930 drm_mode_probed_add(connector, newmode);
931 modes++;
932 }
933 }
934 }
935
936 return modes;
937}
938
9340d8cf
AJ		 939static int drm_cvt_modes(struct drm_connector *connector,
940 struct detailed_timing *timing)
941{
942 int i, j, modes = 0;
943 struct drm_display_mode *newmode;
944 struct drm_device *dev = connector->dev;
945 struct cvt_timing *cvt;
946 const int rates[] = { 60, 85, 75, 60, 50 };
69da3015 947 const u8 empty[3] = { 0, 0, 0 };
9340d8cf
AJ		 948
949 for (i = 0; i < 4; i++) {
29ebdf92 950 int uninitialized_var(width), height;
9340d8cf
AJ		 951 cvt = &(timing->data.other_data.data.cvt[i]);
952
69da3015
AJ		 953 if (!memcmp(cvt->code, empty, 3))
954 continue;
955
8e10ee9a
AJ		 956 height = (cvt->code[0] + ((cvt->code[1] & 0xf0) << 4) + 1) * 2;
957 switch (cvt->code[1] & 0x0c) {
9340d8cf
AJ		 958 case 0x00:
959 width = height * 4 / 3;
960 break;
8e10ee9a 961 case 0x04:
9340d8cf
AJ		 962 width = height * 16 / 9;
963 break;
8e10ee9a 964 case 0x08:
9340d8cf
AJ		 965 width = height * 16 / 10;
966 break;
8e10ee9a 967 case 0x0c:
9340d8cf
AJ		 968 width = height * 15 / 9;
969 break;
970 }
971
972 for (j = 1; j < 5; j++) {
973 if (cvt->code[2] & (1 << j)) {
974 newmode = drm_cvt_mode(dev, width, height,
975 rates[j], j == 0,
976 false, false);
977 if (newmode) {
978 drm_mode_probed_add(connector, newmode);
979 modes++;
980 }
981 }
982 }
983 }
984
985 return modes;
986}
987
9cf00977
AJ		 988static int add_detailed_modes(struct drm_connector *connector,
989 struct detailed_timing *timing,
990 struct edid *edid, u32 quirks, int preferred)
991{
992 int i, modes = 0;
993 struct detailed_non_pixel *data = &timing->data.other_data;
994 int timing_level = standard_timing_level(edid);
07a5e632 995 int gtf = (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF);
9cf00977
AJ		 996 struct drm_display_mode *newmode;
997 struct drm_device *dev = connector->dev;
998
999 if (timing->pixel_clock) {
1000 newmode = drm_mode_detailed(dev, edid, timing, quirks);
1001 if (!newmode)
1002 return 0;
1003
1004 if (preferred)
1005 newmode->type |= DRM_MODE_TYPE_PREFERRED;
1006
1007 drm_mode_probed_add(connector, newmode);
1008 return 1;
1009 }
1010
1011 /* other timing types */
1012 switch (data->type) {
1013 case EDID_DETAIL_MONITOR_RANGE:
07a5e632
AJ		 1014 if (gtf)
1015 modes += drm_gtf_modes_for_range(connector, timing);
9cf00977
AJ		 1016 break;
1017 case EDID_DETAIL_STD_MODES:
1018 /* Six modes per detailed section */
1019 for (i = 0; i < 6; i++) {
1020 struct std_timing *std;
1021 struct drm_display_mode *newmode;
1022
1023 std = &data->data.timings[i];
1024 newmode = drm_mode_std(dev, std, edid->revision,
1025 timing_level);
1026 if (newmode) {
1027 drm_mode_probed_add(connector, newmode);
1028 modes++;
1029 }
1030 }
1031 break;
9340d8cf
AJ		 1032 case EDID_DETAIL_CVT_3BYTE:
1033 modes += drm_cvt_modes(connector, timing);
1034 break;
9cf00977
AJ		 1035 default:
1036 break;
1037 }
1038
1039 return modes;
1040}
1041
f453ba04 1042/**
9cf00977 1043 * add_detailed_info - get detailed mode info from EDID data
f453ba04
DA		 1044 * @connector: attached connector
1045 * @edid: EDID block to scan
1046 * @quirks: quirks to apply
1047 *
1048 * Some of the detailed timing sections may contain mode information. Grab
1049 * it and add it to the list.
1050 */
1051static int add_detailed_info(struct drm_connector *connector,
1052 struct edid *edid, u32 quirks)
1053{
9cf00977 1054 int i, modes = 0;
f453ba04
DA		 1055
1056 for (i = 0; i < EDID_DETAILED_TIMINGS; i++) {
1057 struct detailed_timing *timing = &edid->detailed_timings[i];
9cf00977 1058 int preferred = (i == 0) && (edid->features & DRM_EDID_FEATURE_PREFERRED_TIMING);
f453ba04 1059
9cf00977
AJ		 1060 /* In 1.0, only timings are allowed */
1061 if (!timing->pixel_clock && edid->version == 1 &&
1062 edid->revision == 0)
1063 continue;
f453ba04 1064
9cf00977
AJ		 1065 modes += add_detailed_modes(connector, timing, edid, quirks,
1066 preferred);
f453ba04
DA		 1067 }
1068
1069 return modes;
1070}
9cf00977 1071
882f0219
ZY		 1072/**
1073 * add_detailed_mode_eedid - get detailed mode info from addtional timing
1074 * EDID block
1075 * @connector: attached connector
1076 * @edid: EDID block to scan(It is only to get addtional timing EDID block)
1077 * @quirks: quirks to apply
1078 *
1079 * Some of the detailed timing sections may contain mode information. Grab
1080 * it and add it to the list.
1081 */
1082static int add_detailed_info_eedid(struct drm_connector *connector,
1083 struct edid *edid, u32 quirks)
1084{
9cf00977 1085 int i, modes = 0;
882f0219
ZY		 1086 char *edid_ext = NULL;
1087 struct detailed_timing *timing;
882f0219
ZY		 1088 int edid_ext_num;
1089 int start_offset, end_offset;
1090 int timing_level;
1091
1092 if (edid->version == 1 && edid->revision < 3) {
1093 /* If the EDID version is less than 1.3, there is no
1094 * extension EDID.
1095 */
1096 return 0;
1097 }
1098 if (!edid->extensions) {
1099 /* if there is no extension EDID, it is unnecessary to
1100 * parse the E-EDID to get detailed info
1101 */
1102 return 0;
1103 }
1104
1105 /* Chose real EDID extension number */
3c537889
AD		 1106 edid_ext_num = edid->extensions > DRM_MAX_EDID_EXT_NUM ?
1107 DRM_MAX_EDID_EXT_NUM : edid->extensions;
882f0219
ZY		 1108
1109 /* Find CEA extension */
1110 for (i = 0; i < edid_ext_num; i++) {
1111 edid_ext = (char *)edid + EDID_LENGTH * (i + 1);
1112 /* This block is CEA extension */
1113 if (edid_ext[0] == 0x02)
1114 break;
1115 }
1116
1117 if (i == edid_ext_num) {
1118 /* if there is no additional timing EDID block, return */
1119 return 0;
1120 }
1121
1122 /* Get the start offset of detailed timing block */
1123 start_offset = edid_ext[2];
1124 if (start_offset == 0) {
1125 /* If the start_offset is zero, it means that neither detailed
1126 * info nor data block exist. In such case it is also
1127 * unnecessary to parse the detailed timing info.
1128 */
1129 return 0;
1130 }
1131
1132 timing_level = standard_timing_level(edid);
1133 end_offset = EDID_LENGTH;
1134 end_offset -= sizeof(struct detailed_timing);
1135 for (i = start_offset; i < end_offset;
1136 i += sizeof(struct detailed_timing)) {
1137 timing = (struct detailed_timing *)(edid_ext + i);
9cf00977 1138 modes += add_detailed_modes(connector, timing, edid, quirks, 0);
882f0219
ZY		 1139 }
1140
1141 return modes;
1142}
f453ba04
DA		 1143
1144#define DDC_ADDR 0x50
167f3a04
ML		 1145/**
1146 * Get EDID information via I2C.
1147 *
1148 * \param adapter : i2c device adaptor
1149 * \param buf : EDID data buffer to be filled
1150 * \param len : EDID data buffer length
1151 * \return 0 on success or -1 on failure.
1152 *
1153 * Try to fetch EDID information by calling i2c driver function.
1154 */
1155int drm_do_probe_ddc_edid(struct i2c_adapter *adapter,
1156 unsigned char *buf, int len)
f453ba04
DA		 1157{
1158 unsigned char start = 0x0;
f453ba04
DA		 1159 struct i2c_msg msgs[] = {
1160 {
1161 .addr = DDC_ADDR,
1162 .flags = 0,
1163 .len = 1,
1164 .buf = &start,
1165 }, {
1166 .addr = DDC_ADDR,
1167 .flags = I2C_M_RD,
167f3a04 1168 .len = len,
f453ba04
DA		 1169 .buf = buf,
1170 }
1171 };
1172
f453ba04 1173 if (i2c_transfer(adapter, msgs, 2) == 2)
167f3a04 1174 return 0;
f453ba04 1175
167f3a04 1176 return -1;
f453ba04
DA		 1177}
1178EXPORT_SYMBOL(drm_do_probe_ddc_edid);
1179
167f3a04
ML		 1180static int drm_ddc_read_edid(struct drm_connector *connector,
1181 struct i2c_adapter *adapter,
1182 char *buf, int len)
1183{
47ee4ccf 1184 int i;
167f3a04 1185
47ee4ccf
AJ		 1186 for (i = 0; i < 4; i++) {
1187 if (drm_do_probe_ddc_edid(adapter, buf, len))
1188 return -1;
3c537889 1189 if (drm_edid_is_valid((struct edid *)buf))
47ee4ccf 1190 return 0;
167f3a04 1191 }
47ee4ccf
AJ		 1192
1193 /* repeated checksum failures; warn, but carry on */
1194 dev_warn(&connector->dev->pdev->dev, "%s: EDID invalid.\n",
1195 drm_get_connector_name(connector));
1196 return -1;
f453ba04
DA		 1197}
1198
1199/**
1200 * drm_get_edid - get EDID data, if available
1201 * @connector: connector we're probing
1202 * @adapter: i2c adapter to use for DDC
1203 *
1204 * Poke the given connector's i2c channel to grab EDID data if possible.
1205 *
1206 * Return edid data or NULL if we couldn't find any.
1207 */
1208struct edid *drm_get_edid(struct drm_connector *connector,
1209 struct i2c_adapter *adapter)
1210{
167f3a04 1211 int ret;
f453ba04
DA		 1212 struct edid *edid;
1213
3c537889 1214 edid = kmalloc(EDID_LENGTH * (DRM_MAX_EDID_EXT_NUM + 1),
167f3a04
ML		 1215 GFP_KERNEL);
1216 if (edid == NULL) {
1217 dev_warn(&connector->dev->pdev->dev,
1218 "Failed to allocate EDID\n");
1219 goto end;
f453ba04 1220 }
167f3a04
ML		 1221
1222 /* Read first EDID block */
1223 ret = drm_ddc_read_edid(connector, adapter,
1224 (unsigned char *)edid, EDID_LENGTH);
1225 if (ret != 0)
1226 goto clean_up;
1227
1228 /* There are EDID extensions to be read */
1229 if (edid->extensions != 0) {
1230 int edid_ext_num = edid->extensions;
1231
3c537889 1232 if (edid_ext_num > DRM_MAX_EDID_EXT_NUM) {
167f3a04
ML		 1233 dev_warn(&connector->dev->pdev->dev,
1234 "The number of extension(%d) is "
1235 "over max (%d), actually read number (%d)\n",
3c537889
AD		 1236 edid_ext_num, DRM_MAX_EDID_EXT_NUM,
1237 DRM_MAX_EDID_EXT_NUM);
167f3a04 1238 /* Reset EDID extension number to be read */
3c537889 1239 edid_ext_num = DRM_MAX_EDID_EXT_NUM;
167f3a04
ML		 1240 }
1241 /* Read EDID including extensions too */
1242 ret = drm_ddc_read_edid(connector, adapter, (char *)edid,
1243 EDID_LENGTH * (edid_ext_num + 1));
1244 if (ret != 0)
1245 goto clean_up;
1246
f453ba04
DA		 1247 }
1248
1249 connector->display_info.raw_edid = (char *)edid;
167f3a04 1250 goto end;
f453ba04 1251
167f3a04
ML		 1252clean_up:
1253 kfree(edid);
1254 edid = NULL;
1255end:
f453ba04 1256 return edid;
167f3a04 1257
f453ba04
DA		 1258}
1259EXPORT_SYMBOL(drm_get_edid);
1260
f23c20c8
ML		 1261#define HDMI_IDENTIFIER 0x000C03
1262#define VENDOR_BLOCK 0x03
1263/**
1264 * drm_detect_hdmi_monitor - detect whether monitor is hdmi.
1265 * @edid: monitor EDID information
1266 *
1267 * Parse the CEA extension according to CEA-861-B.
1268 * Return true if HDMI, false if not or unknown.
1269 */
1270bool drm_detect_hdmi_monitor(struct edid *edid)
1271{
1272 char *edid_ext = NULL;
1273 int i, hdmi_id, edid_ext_num;
1274 int start_offset, end_offset;
1275 bool is_hdmi = false;
1276
1277 /* No EDID or EDID extensions */
1278 if (edid == NULL || edid->extensions == 0)
1279 goto end;
1280
1281 /* Chose real EDID extension number */
3c537889
AD		 1282 edid_ext_num = edid->extensions > DRM_MAX_EDID_EXT_NUM ?
1283 DRM_MAX_EDID_EXT_NUM : edid->extensions;
f23c20c8
ML		 1284
1285 /* Find CEA extension */
1286 for (i = 0; i < edid_ext_num; i++) {
1287 edid_ext = (char *)edid + EDID_LENGTH * (i + 1);
1288 /* This block is CEA extension */
1289 if (edid_ext[0] == 0x02)
1290 break;
1291 }
1292
1293 if (i == edid_ext_num)
1294 goto end;
1295
1296 /* Data block offset in CEA extension block */
1297 start_offset = 4;
1298 end_offset = edid_ext[2];
1299
1300 /*
1301 * Because HDMI identifier is in Vendor Specific Block,
1302 * search it from all data blocks of CEA extension.
1303 */
1304 for (i = start_offset; i < end_offset;
1305 /* Increased by data block len */
1306 i += ((edid_ext[i] & 0x1f) + 1)) {
1307 /* Find vendor specific block */
1308 if ((edid_ext[i] >> 5) == VENDOR_BLOCK) {
1309 hdmi_id = edid_ext[i + 1] | (edid_ext[i + 2] << 8) |
1310 edid_ext[i + 3] << 16;
1311 /* Find HDMI identifier */
1312 if (hdmi_id == HDMI_IDENTIFIER)
1313 is_hdmi = true;
1314 break;
1315 }
1316 }
1317
1318end:
1319 return is_hdmi;
1320}
1321EXPORT_SYMBOL(drm_detect_hdmi_monitor);
1322
f453ba04
DA		 1323/**
1324 * drm_add_edid_modes - add modes from EDID data, if available
1325 * @connector: connector we're probing
1326 * @edid: edid data
1327 *
1328 * Add the specified modes to the connector's mode list.
1329 *
1330 * Return number of modes added or 0 if we couldn't find any.
1331 */
1332int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid)
1333{
1334 int num_modes = 0;
1335 u32 quirks;
1336
1337 if (edid == NULL) {
1338 return 0;
1339 }
3c537889 1340 if (!drm_edid_is_valid(edid)) {
f453ba04
DA		 1341 dev_warn(&connector->dev->pdev->dev, "%s: EDID invalid.\n",
1342 drm_get_connector_name(connector));
1343 return 0;
1344 }
1345
1346 quirks = edid_get_quirks(edid);
1347
1348 num_modes += add_established_modes(connector, edid);
1349 num_modes += add_standard_modes(connector, edid);
1350 num_modes += add_detailed_info(connector, edid, quirks);
882f0219 1351 num_modes += add_detailed_info_eedid(connector, edid, quirks);
f453ba04
DA		 1352
1353 if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75))
1354 edid_fixup_preferred(connector, quirks);
1355
0454beab
MD		 1356 connector->display_info.serration_vsync = (edid->input & DRM_EDID_INPUT_SERRATION_VSYNC) ? 1 : 0;
1357 connector->display_info.sync_on_green = (edid->input & DRM_EDID_INPUT_SYNC_ON_GREEN) ? 1 : 0;
1358 connector->display_info.composite_sync = (edid->input & DRM_EDID_INPUT_COMPOSITE_SYNC) ? 1 : 0;
1359 connector->display_info.separate_syncs = (edid->input & DRM_EDID_INPUT_SEPARATE_SYNCS) ? 1 : 0;
1360 connector->display_info.blank_to_black = (edid->input & DRM_EDID_INPUT_BLANK_TO_BLACK) ? 1 : 0;
1361 connector->display_info.video_level = (edid->input & DRM_EDID_INPUT_VIDEO_LEVEL) >> 5;
1362 connector->display_info.digital = (edid->input & DRM_EDID_INPUT_DIGITAL) ? 1 : 0;
f453ba04
DA		 1363 connector->display_info.width_mm = edid->width_cm * 10;
1364 connector->display_info.height_mm = edid->height_cm * 10;
1365 connector->display_info.gamma = edid->gamma;
0454beab
MD		 1366 connector->display_info.gtf_supported = (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF) ? 1 : 0;
1367 connector->display_info.standard_color = (edid->features & DRM_EDID_FEATURE_STANDARD_COLOR) ? 1 : 0;
1368 connector->display_info.display_type = (edid->features & DRM_EDID_FEATURE_DISPLAY_TYPE) >> 3;
1369 connector->display_info.active_off_supported = (edid->features & DRM_EDID_FEATURE_PM_ACTIVE_OFF) ? 1 : 0;
1370 connector->display_info.suspend_supported = (edid->features & DRM_EDID_FEATURE_PM_SUSPEND) ? 1 : 0;
1371 connector->display_info.standby_supported = (edid->features & DRM_EDID_FEATURE_PM_STANDBY) ? 1 : 0;
f453ba04
DA		 1372 connector->display_info.gamma = edid->gamma;
1373
1374 return num_modes;
1375}
1376EXPORT_SYMBOL(drm_add_edid_modes);
f0fda0a4
ZY		 1377
1378/**
1379 * drm_add_modes_noedid - add modes for the connectors without EDID
1380 * @connector: connector we're probing
1381 * @hdisplay: the horizontal display limit
1382 * @vdisplay: the vertical display limit
1383 *
1384 * Add the specified modes to the connector's mode list. Only when the
1385 * hdisplay/vdisplay is not beyond the given limit, it will be added.
1386 *
1387 * Return number of modes added or 0 if we couldn't find any.
1388 */
1389int drm_add_modes_noedid(struct drm_connector *connector,
1390 int hdisplay, int vdisplay)
1391{
1392 int i, count, num_modes = 0;
1393 struct drm_display_mode *mode, *ptr;
1394 struct drm_device *dev = connector->dev;
1395
1396 count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
1397 if (hdisplay < 0)
1398 hdisplay = 0;
1399 if (vdisplay < 0)
1400 vdisplay = 0;
1401
1402 for (i = 0; i < count; i++) {
1403 ptr = &drm_dmt_modes[i];
1404 if (hdisplay && vdisplay) {
1405 /*
1406 * Only when two are valid, they will be used to check
1407 * whether the mode should be added to the mode list of
1408 * the connector.
1409 */
1410 if (ptr->hdisplay > hdisplay ||
1411 ptr->vdisplay > vdisplay)
1412 continue;
1413 }
f985dedb
AJ		 1414 if (drm_mode_vrefresh(ptr) > 61)
1415 continue;
f0fda0a4
ZY		 1416 mode = drm_mode_duplicate(dev, ptr);
1417 if (mode) {
1418 drm_mode_probed_add(connector, mode);
1419 num_modes++;
1420 }
1421 }
1422 return num_modes;
1423}
1424EXPORT_SYMBOL(drm_add_modes_noedid);
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git