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1123 serge 1
/*
2
 * Copyright (c) 2006 Luc Verhaegen (quirks list)
3
 * Copyright (c) 2007-2008 Intel Corporation
4
 *   Jesse Barnes 
5
 *
6
 * DDC probing routines (drm_ddc_read & drm_do_probe_ddc_edid) originally from
7
 * FB layer.
8
 *   Copyright (C) 2006 Dennis Munsie 
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
 */
1221 serge 29
#include 
1125 serge 30
#include 
31
#include 
1123 serge 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)
1179 serge 63
/* define the number of Extension EDID block */
64
#define MAX_EDID_EXT_NUM 4
1123 serge 65
 
1179 serge 66
#define LEVEL_DMT	0
67
#define LEVEL_GTF	1
68
#define LEVEL_CVT	2
69
 
1123 serge 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 */
1221 serge 112
static const u8 edid_header[] = {
113
	0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00
114
};
1123 serge 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;
127
	u8 csum = 0;
128
	u8 *raw_edid = (u8 *)edid;
129
 
130
	if (memcmp(edid->header, edid_header, sizeof(edid_header)))
131
		goto bad;
132
	if (edid->version != 1) {
133
		DRM_ERROR("EDID has major version %d, instead of 1\n", edid->version);
134
		goto bad;
135
	}
136
	if (edid->revision > 4)
137
		DRM_DEBUG("EDID minor > 4, assuming backward compatibility\n");
138
 
139
	for (i = 0; i < EDID_LENGTH; i++)
140
		csum += raw_edid[i];
141
	if (csum) {
142
		DRM_ERROR("EDID checksum is invalid, remainder is %d\n", csum);
143
		goto bad;
144
	}
145
 
146
	return 1;
147
 
148
bad:
149
	if (raw_edid) {
150
		DRM_ERROR("Raw EDID:\n");
151
//       print_hex_dump_bytes(KERN_ERR, DUMP_PREFIX_NONE, raw_edid, EDID_LENGTH);
152
//       printk("\n");
153
	}
154
	return 0;
155
}
156
 
157
/**
158
 * edid_vendor - match a string against EDID's obfuscated vendor field
159
 * @edid: EDID to match
160
 * @vendor: vendor string
161
 *
162
 * Returns true if @vendor is in @edid, false otherwise
163
 */
164
static bool edid_vendor(struct edid *edid, char *vendor)
165
{
166
	char edid_vendor[3];
167
 
168
	edid_vendor[0] = ((edid->mfg_id[0] & 0x7c) >> 2) + '@';
169
	edid_vendor[1] = (((edid->mfg_id[0] & 0x3) << 3) |
170
			  ((edid->mfg_id[1] & 0xe0) >> 5)) + '@';
171
	edid_vendor[2] = (edid->mfg_id[1] & 0x1f) + '@';
172
 
173
	return !strncmp(edid_vendor, vendor, 3);
174
}
175
 
176
/**
177
 * edid_get_quirks - return quirk flags for a given EDID
178
 * @edid: EDID to process
179
 *
180
 * This tells subsequent routines what fixes they need to apply.
181
 */
182
static u32 edid_get_quirks(struct edid *edid)
183
{
184
	struct edid_quirk *quirk;
185
	int i;
186
 
187
	for (i = 0; i < ARRAY_SIZE(edid_quirk_list); i++) {
188
		quirk = &edid_quirk_list[i];
189
 
190
		if (edid_vendor(edid, quirk->vendor) &&
191
		    (EDID_PRODUCT_ID(edid) == quirk->product_id))
192
			return quirk->quirks;
193
	}
194
 
195
	return 0;
196
}
197
 
198
#define MODE_SIZE(m) ((m)->hdisplay * (m)->vdisplay)
199
#define MODE_REFRESH_DIFF(m,r) (abs((m)->vrefresh - target_refresh))
200
 
201
 
202
/**
203
 * edid_fixup_preferred - set preferred modes based on quirk list
204
 * @connector: has mode list to fix up
205
 * @quirks: quirks list
206
 *
207
 * Walk the mode list for @connector, clearing the preferred status
208
 * on existing modes and setting it anew for the right mode ala @quirks.
209
 */
210
static void edid_fixup_preferred(struct drm_connector *connector,
211
				 u32 quirks)
212
{
213
	struct drm_display_mode *t, *cur_mode, *preferred_mode;
214
	int target_refresh = 0;
215
 
216
	if (list_empty(&connector->probed_modes))
217
		return;
218
 
219
	if (quirks & EDID_QUIRK_PREFER_LARGE_60)
220
		target_refresh = 60;
221
	if (quirks & EDID_QUIRK_PREFER_LARGE_75)
222
		target_refresh = 75;
223
 
224
	preferred_mode = list_first_entry(&connector->probed_modes,
225
					  struct drm_display_mode, head);
226
 
227
	list_for_each_entry_safe(cur_mode, t, &connector->probed_modes, head) {
228
		cur_mode->type &= ~DRM_MODE_TYPE_PREFERRED;
229
 
230
		if (cur_mode == preferred_mode)
231
			continue;
232
 
233
		/* Largest mode is preferred */
234
		if (MODE_SIZE(cur_mode) > MODE_SIZE(preferred_mode))
235
			preferred_mode = cur_mode;
236
 
237
		/* At a given size, try to get closest to target refresh */
238
		if ((MODE_SIZE(cur_mode) == MODE_SIZE(preferred_mode)) &&
239
		    MODE_REFRESH_DIFF(cur_mode, target_refresh) <
240
		    MODE_REFRESH_DIFF(preferred_mode, target_refresh)) {
241
			preferred_mode = cur_mode;
242
		}
243
	}
244
 
245
	preferred_mode->type |= DRM_MODE_TYPE_PREFERRED;
246
}
247
 
1179 serge 248
/*
249
 * Add the Autogenerated from the DMT spec.
250
 * This table is copied from xfree86/modes/xf86EdidModes.c.
251
 * But the mode with Reduced blank feature is deleted.
252
 */
253
static struct drm_display_mode drm_dmt_modes[] = {
254
	/* 640x350@85Hz */
255
	{ DRM_MODE("640x350", DRM_MODE_TYPE_DRIVER, 31500, 640, 672,
256
		   736, 832, 0, 350, 382, 385, 445, 0,
257
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC) },
258
	/* 640x400@85Hz */
259
	{ DRM_MODE("640x400", DRM_MODE_TYPE_DRIVER, 31500, 640, 672,
260
		   736, 832, 0, 400, 401, 404, 445, 0,
261
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
262
	/* 720x400@85Hz */
263
	{ DRM_MODE("720x400", DRM_MODE_TYPE_DRIVER, 35500, 720, 756,
264
		   828, 936, 0, 400, 401, 404, 446, 0,
265
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
266
	/* 640x480@60Hz */
267
	{ DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 25175, 640, 656,
268
		   752, 800, 0, 480, 489, 492, 525, 0,
269
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
270
	/* 640x480@72Hz */
271
	{ DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 664,
272
		   704, 832, 0, 480, 489, 492, 520, 0,
273
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
274
	/* 640x480@75Hz */
275
	{ DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 656,
276
		   720, 840, 0, 480, 481, 484, 500, 0,
277
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
278
	/* 640x480@85Hz */
279
	{ DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 36000, 640, 696,
280
		   752, 832, 0, 480, 481, 484, 509, 0,
281
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
282
	/* 800x600@56Hz */
283
	{ DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 36000, 800, 824,
284
		   896, 1024, 0, 600, 601, 603, 625, 0,
285
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
286
	/* 800x600@60Hz */
287
	{ DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 40000, 800, 840,
288
		   968, 1056, 0, 600, 601, 605, 628, 0,
289
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
290
	/* 800x600@72Hz */
291
	{ DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 50000, 800, 856,
292
		   976, 1040, 0, 600, 637, 643, 666, 0,
293
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
294
	/* 800x600@75Hz */
295
	{ DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 49500, 800, 816,
296
		   896, 1056, 0, 600, 601, 604, 625, 0,
297
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
298
	/* 800x600@85Hz */
299
	{ DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 56250, 800, 832,
300
		   896, 1048, 0, 600, 601, 604, 631, 0,
301
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
302
	/* 848x480@60Hz */
303
	{ DRM_MODE("848x480", DRM_MODE_TYPE_DRIVER, 33750, 848, 864,
304
		   976, 1088, 0, 480, 486, 494, 517, 0,
305
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
306
	/* 1024x768@43Hz, interlace */
307
	{ DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 44900, 1024, 1032,
308
		   1208, 1264, 0, 768, 768, 772, 817, 0,
309
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC |
310
			DRM_MODE_FLAG_INTERLACE) },
311
	/* 1024x768@60Hz */
312
	{ DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 65000, 1024, 1048,
313
		   1184, 1344, 0, 768, 771, 777, 806, 0,
314
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
315
	/* 1024x768@70Hz */
316
	{ DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 75000, 1024, 1048,
317
		   1184, 1328, 0, 768, 771, 777, 806, 0,
318
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
319
	/* 1024x768@75Hz */
320
	{ DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 78750, 1024, 1040,
321
		   1136, 1312, 0, 768, 769, 772, 800, 0,
322
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
323
	/* 1024x768@85Hz */
324
	{ DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 94500, 1024, 1072,
325
		   1072, 1376, 0, 768, 769, 772, 808, 0,
326
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
327
	/* 1152x864@75Hz */
328
	{ DRM_MODE("1152x864", DRM_MODE_TYPE_DRIVER, 108000, 1152, 1216,
329
		   1344, 1600, 0, 864, 865, 868, 900, 0,
330
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
331
	/* 1280x768@60Hz */
332
	{ DRM_MODE("1280x768", DRM_MODE_TYPE_DRIVER, 79500, 1280, 1344,
333
		   1472, 1664, 0, 768, 771, 778, 798, 0,
334
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
335
	/* 1280x768@75Hz */
336
	{ DRM_MODE("1280x768", DRM_MODE_TYPE_DRIVER, 102250, 1280, 1360,
337
		   1488, 1696, 0, 768, 771, 778, 805, 0,
338
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC) },
339
	/* 1280x768@85Hz */
340
	{ DRM_MODE("1280x768", DRM_MODE_TYPE_DRIVER, 117500, 1280, 1360,
341
		   1496, 1712, 0, 768, 771, 778, 809, 0,
342
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
343
	/* 1280x800@60Hz */
344
	{ DRM_MODE("1280x800", DRM_MODE_TYPE_DRIVER, 83500, 1280, 1352,
345
		   1480, 1680, 0, 800, 803, 809, 831, 0,
346
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC) },
347
	/* 1280x800@75Hz */
348
	{ DRM_MODE("1280x800", DRM_MODE_TYPE_DRIVER, 106500, 1280, 1360,
349
		   1488, 1696, 0, 800, 803, 809, 838, 0,
350
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
351
	/* 1280x800@85Hz */
352
	{ DRM_MODE("1280x800", DRM_MODE_TYPE_DRIVER, 122500, 1280, 1360,
353
		   1496, 1712, 0, 800, 803, 809, 843, 0,
354
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
355
	/* 1280x960@60Hz */
356
	{ DRM_MODE("1280x960", DRM_MODE_TYPE_DRIVER, 108000, 1280, 1376,
357
		   1488, 1800, 0, 960, 961, 964, 1000, 0,
358
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
359
	/* 1280x960@85Hz */
360
	{ DRM_MODE("1280x960", DRM_MODE_TYPE_DRIVER, 148500, 1280, 1344,
361
		   1504, 1728, 0, 960, 961, 964, 1011, 0,
362
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
363
	/* 1280x1024@60Hz */
364
	{ DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 108000, 1280, 1328,
365
		   1440, 1688, 0, 1024, 1025, 1028, 1066, 0,
366
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
367
	/* 1280x1024@75Hz */
368
	{ DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 135000, 1280, 1296,
369
		   1440, 1688, 0, 1024, 1025, 1028, 1066, 0,
370
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
371
	/* 1280x1024@85Hz */
372
	{ DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 157500, 1280, 1344,
373
		   1504, 1728, 0, 1024, 1025, 1028, 1072, 0,
374
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
375
	/* 1360x768@60Hz */
376
	{ DRM_MODE("1360x768", DRM_MODE_TYPE_DRIVER, 85500, 1360, 1424,
377
		   1536, 1792, 0, 768, 771, 777, 795, 0,
378
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
379
	/* 1440x1050@60Hz */
380
	{ DRM_MODE("1400x1050", DRM_MODE_TYPE_DRIVER, 121750, 1400, 1488,
381
		   1632, 1864, 0, 1050, 1053, 1057, 1089, 0,
382
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
383
	/* 1440x1050@75Hz */
384
	{ DRM_MODE("1400x1050", DRM_MODE_TYPE_DRIVER, 156000, 1400, 1504,
385
		   1648, 1896, 0, 1050, 1053, 1057, 1099, 0,
386
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
387
	/* 1440x1050@85Hz */
388
	{ DRM_MODE("1400x1050", DRM_MODE_TYPE_DRIVER, 179500, 1400, 1504,
389
		   1656, 1912, 0, 1050, 1053, 1057, 1105, 0,
390
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
391
	/* 1440x900@60Hz */
392
	{ DRM_MODE("1440x900", DRM_MODE_TYPE_DRIVER, 106500, 1440, 1520,
393
		   1672, 1904, 0, 900, 903, 909, 934, 0,
394
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
395
	/* 1440x900@75Hz */
396
	{ DRM_MODE("1440x900", DRM_MODE_TYPE_DRIVER, 136750, 1440, 1536,
397
		   1688, 1936, 0, 900, 903, 909, 942, 0,
398
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
399
	/* 1440x900@85Hz */
400
	{ DRM_MODE("1440x900", DRM_MODE_TYPE_DRIVER, 157000, 1440, 1544,
401
		   1696, 1952, 0, 900, 903, 909, 948, 0,
402
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
403
	/* 1600x1200@60Hz */
404
	{ DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 162000, 1600, 1664,
405
		   1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
406
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
407
	/* 1600x1200@65Hz */
408
	{ DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 175500, 1600, 1664,
409
		   1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
410
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
411
	/* 1600x1200@70Hz */
412
	{ DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 189000, 1600, 1664,
413
		   1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
414
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
415
	/* 1600x1200@75Hz */
416
	{ DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 2025000, 1600, 1664,
417
		   1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
418
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
419
	/* 1600x1200@85Hz */
420
	{ DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 229500, 1600, 1664,
421
		   1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
422
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
423
	/* 1680x1050@60Hz */
424
	{ DRM_MODE("1680x1050", DRM_MODE_TYPE_DRIVER, 146250, 1680, 1784,
425
		   1960, 2240, 0, 1050, 1053, 1059, 1089, 0,
426
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
427
	/* 1680x1050@75Hz */
428
	{ DRM_MODE("1680x1050", DRM_MODE_TYPE_DRIVER, 187000, 1680, 1800,
429
		   1976, 2272, 0, 1050, 1053, 1059, 1099, 0,
430
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
431
	/* 1680x1050@85Hz */
432
	{ DRM_MODE("1680x1050", DRM_MODE_TYPE_DRIVER, 214750, 1680, 1808,
433
		   1984, 2288, 0, 1050, 1053, 1059, 1105, 0,
434
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
435
	/* 1792x1344@60Hz */
436
	{ DRM_MODE("1792x1344", DRM_MODE_TYPE_DRIVER, 204750, 1792, 1920,
437
		   2120, 2448, 0, 1344, 1345, 1348, 1394, 0,
438
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
439
	/* 1729x1344@75Hz */
440
	{ DRM_MODE("1792x1344", DRM_MODE_TYPE_DRIVER, 261000, 1792, 1888,
441
		   2104, 2456, 0, 1344, 1345, 1348, 1417, 0,
442
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
443
	/* 1853x1392@60Hz */
444
	{ DRM_MODE("1856x1392", DRM_MODE_TYPE_DRIVER, 218250, 1856, 1952,
445
		   2176, 2528, 0, 1392, 1393, 1396, 1439, 0,
446
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
447
	/* 1856x1392@75Hz */
448
	{ DRM_MODE("1856x1392", DRM_MODE_TYPE_DRIVER, 288000, 1856, 1984,
449
		   2208, 2560, 0, 1392, 1395, 1399, 1500, 0,
450
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
451
	/* 1920x1200@60Hz */
452
	{ DRM_MODE("1920x1200", DRM_MODE_TYPE_DRIVER, 193250, 1920, 2056,
453
		   2256, 2592, 0, 1200, 1203, 1209, 1245, 0,
454
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
455
	/* 1920x1200@75Hz */
456
	{ DRM_MODE("1920x1200", DRM_MODE_TYPE_DRIVER, 245250, 1920, 2056,
457
		   2264, 2608, 0, 1200, 1203, 1209, 1255, 0,
458
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
459
	/* 1920x1200@85Hz */
460
	{ DRM_MODE("1920x1200", DRM_MODE_TYPE_DRIVER, 281250, 1920, 2064,
461
		   2272, 2624, 0, 1200, 1203, 1209, 1262, 0,
462
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
463
	/* 1920x1440@60Hz */
464
	{ DRM_MODE("1920x1440", DRM_MODE_TYPE_DRIVER, 234000, 1920, 2048,
465
		   2256, 2600, 0, 1440, 1441, 1444, 1500, 0,
466
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
467
	/* 1920x1440@75Hz */
468
	{ DRM_MODE("1920x1440", DRM_MODE_TYPE_DRIVER, 297000, 1920, 2064,
469
		   2288, 2640, 0, 1440, 1441, 1444, 1500, 0,
470
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
471
	/* 2560x1600@60Hz */
472
	{ DRM_MODE("2560x1600", DRM_MODE_TYPE_DRIVER, 348500, 2560, 2752,
473
		   3032, 3504, 0, 1600, 1603, 1609, 1658, 0,
474
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
475
	/* 2560x1600@75HZ */
476
	{ DRM_MODE("2560x1600", DRM_MODE_TYPE_DRIVER, 443250, 2560, 2768,
477
		   3048, 3536, 0, 1600, 1603, 1609, 1672, 0,
478
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
479
	/* 2560x1600@85HZ */
480
	{ DRM_MODE("2560x1600", DRM_MODE_TYPE_DRIVER, 505250, 2560, 2768,
481
		   3048, 3536, 0, 1600, 1603, 1609, 1682, 0,
482
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
483
};
484
 
485
static struct drm_display_mode *drm_find_dmt(struct drm_device *dev,
486
			int hsize, int vsize, int fresh)
487
{
488
	int i, count;
489
	struct drm_display_mode *ptr, *mode;
490
 
491
	count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
492
	mode = NULL;
493
	for (i = 0; i < count; i++) {
494
		ptr = &drm_dmt_modes[i];
495
		if (hsize == ptr->hdisplay &&
496
			vsize == ptr->vdisplay &&
497
			fresh == drm_mode_vrefresh(ptr)) {
498
			/* get the expected default mode */
499
			mode = drm_mode_duplicate(dev, ptr);
500
			break;
501
		}
502
	}
503
	return mode;
504
}
1221 serge 505
 
506
/*
507
 * 0 is reserved.  The spec says 0x01 fill for unused timings.  Some old
508
 * monitors fill with ascii space (0x20) instead.
509
 */
510
static int
511
bad_std_timing(u8 a, u8 b)
512
{
513
	return (a == 0x00 && b == 0x00) ||
514
	       (a == 0x01 && b == 0x01) ||
515
	       (a == 0x20 && b == 0x20);
516
}
517
 
1123 serge 518
/**
519
 * drm_mode_std - convert standard mode info (width, height, refresh) into mode
520
 * @t: standard timing params
1221 serge 521
 * @timing_level: standard timing level
1123 serge 522
 *
523
 * Take the standard timing params (in this case width, aspect, and refresh)
1221 serge 524
 * and convert them into a real mode using CVT/GTF/DMT.
1123 serge 525
 *
526
 * Punts for now, but should eventually use the FB layer's CVT based mode
527
 * generation code.
528
 */
529
struct drm_display_mode *drm_mode_std(struct drm_device *dev,
1179 serge 530
				      struct std_timing *t,
1221 serge 531
				      int revision,
1179 serge 532
				      int timing_level)
1123 serge 533
{
534
	struct drm_display_mode *mode;
1179 serge 535
	int hsize, vsize;
536
	int vrefresh_rate;
1123 serge 537
	unsigned aspect_ratio = (t->vfreq_aspect & EDID_TIMING_ASPECT_MASK)
538
		>> EDID_TIMING_ASPECT_SHIFT;
1179 serge 539
	unsigned vfreq = (t->vfreq_aspect & EDID_TIMING_VFREQ_MASK)
540
		>> EDID_TIMING_VFREQ_SHIFT;
1123 serge 541
 
1221 serge 542
	if (bad_std_timing(t->hsize, t->vfreq_aspect))
543
		return NULL;
544
 
1179 serge 545
	/* According to the EDID spec, the hdisplay = hsize * 8 + 248 */
546
	hsize = t->hsize * 8 + 248;
547
	/* vrefresh_rate = vfreq + 60 */
548
	vrefresh_rate = vfreq + 60;
549
	/* the vdisplay is calculated based on the aspect ratio */
1221 serge 550
	if (aspect_ratio == 0) {
551
		if (revision < 3)
552
			vsize = hsize;
553
		else
1123 serge 554
		vsize = (hsize * 10) / 16;
1221 serge 555
	} else if (aspect_ratio == 1)
1123 serge 556
		vsize = (hsize * 3) / 4;
557
	else if (aspect_ratio == 2)
558
		vsize = (hsize * 4) / 5;
559
	else
560
		vsize = (hsize * 9) / 16;
1179 serge 561
	/* HDTV hack */
562
	if (hsize == 1360 && vsize == 765 && vrefresh_rate == 60) {
1221 serge 563
		mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0,
564
				    false);
1179 serge 565
		mode->hdisplay = 1366;
566
		mode->vsync_start = mode->vsync_start - 1;
567
		mode->vsync_end = mode->vsync_end - 1;
568
		return mode;
569
	}
570
	mode = NULL;
571
	/* check whether it can be found in default mode table */
572
	mode = drm_find_dmt(dev, hsize, vsize, vrefresh_rate);
573
	if (mode)
574
		return mode;
1123 serge 575
 
1179 serge 576
	switch (timing_level) {
577
	case LEVEL_DMT:
578
		break;
579
	case LEVEL_GTF:
580
		mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
581
		break;
582
	case LEVEL_CVT:
1221 serge 583
		mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0,
584
				    false);
1179 serge 585
		break;
586
	}
1123 serge 587
	return mode;
588
}
589
 
590
/**
591
 * drm_mode_detailed - create a new mode from an EDID detailed timing section
592
 * @dev: DRM device (needed to create new mode)
593
 * @edid: EDID block
594
 * @timing: EDID detailed timing info
595
 * @quirks: quirks to apply
596
 *
597
 * An EDID detailed timing block contains enough info for us to create and
598
 * return a new struct drm_display_mode.
599
 */
600
static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev,
601
						  struct edid *edid,
602
						  struct detailed_timing *timing,
603
						  u32 quirks)
604
{
605
	struct drm_display_mode *mode;
606
	struct detailed_pixel_timing *pt = &timing->data.pixel_data;
607
	unsigned hactive = (pt->hactive_hblank_hi & 0xf0) << 4 | pt->hactive_lo;
608
	unsigned vactive = (pt->vactive_vblank_hi & 0xf0) << 4 | pt->vactive_lo;
609
	unsigned hblank = (pt->hactive_hblank_hi & 0xf) << 8 | pt->hblank_lo;
610
	unsigned vblank = (pt->vactive_vblank_hi & 0xf) << 8 | pt->vblank_lo;
611
	unsigned hsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc0) << 2 | pt->hsync_offset_lo;
612
	unsigned hsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x30) << 4 | pt->hsync_pulse_width_lo;
613
	unsigned vsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc) >> 2 | pt->vsync_offset_pulse_width_lo >> 4;
614
	unsigned vsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x3) << 4 | (pt->vsync_offset_pulse_width_lo & 0xf);
615
 
616
	/* ignore tiny modes */
617
	if (hactive < 64 || vactive < 64)
618
		return NULL;
619
 
620
	if (pt->misc & DRM_EDID_PT_STEREO) {
621
		printk(KERN_WARNING "stereo mode not supported\n");
622
		return NULL;
623
	}
624
	if (!(pt->misc & DRM_EDID_PT_SEPARATE_SYNC)) {
625
		printk(KERN_WARNING "integrated sync not supported\n");
626
		return NULL;
627
	}
628
 
1246 serge 629
	/* it is incorrect if hsync/vsync width is zero */
630
	if (!hsync_pulse_width || !vsync_pulse_width) {
631
		DRM_DEBUG_KMS("Incorrect Detailed timing. "
632
				"Wrong Hsync/Vsync pulse width\n");
633
		return NULL;
634
	}
1123 serge 635
	mode = drm_mode_create(dev);
636
	if (!mode)
637
		return NULL;
638
 
639
	mode->type = DRM_MODE_TYPE_DRIVER;
640
 
641
	if (quirks & EDID_QUIRK_135_CLOCK_TOO_HIGH)
642
		timing->pixel_clock = cpu_to_le16(1088);
643
 
644
	mode->clock = le16_to_cpu(timing->pixel_clock) * 10;
645
 
646
	mode->hdisplay = hactive;
647
	mode->hsync_start = mode->hdisplay + hsync_offset;
648
	mode->hsync_end = mode->hsync_start + hsync_pulse_width;
649
	mode->htotal = mode->hdisplay + hblank;
650
 
651
	mode->vdisplay = vactive;
652
	mode->vsync_start = mode->vdisplay + vsync_offset;
653
	mode->vsync_end = mode->vsync_start + vsync_pulse_width;
654
	mode->vtotal = mode->vdisplay + vblank;
655
 
1246 serge 656
	/* perform the basic check for the detailed timing */
657
	if (mode->hsync_end > mode->htotal ||
658
		mode->vsync_end > mode->vtotal) {
659
		drm_mode_destroy(dev, mode);
660
		DRM_DEBUG_KMS("Incorrect detailed timing. "
661
				"Sync is beyond the blank.\n");
662
		return NULL;
663
	}
664
 
1313 serge 665
	/* Some EDIDs have bogus h/vtotal values */
666
	if (mode->hsync_end > mode->htotal)
667
		mode->htotal = mode->hsync_end + 1;
668
	if (mode->vsync_end > mode->vtotal)
669
		mode->vtotal = mode->vsync_end + 1;
670
 
1123 serge 671
	drm_mode_set_name(mode);
672
 
673
	if (pt->misc & DRM_EDID_PT_INTERLACED)
674
		mode->flags |= DRM_MODE_FLAG_INTERLACE;
675
 
676
	if (quirks & EDID_QUIRK_DETAILED_SYNC_PP) {
677
		pt->misc |= DRM_EDID_PT_HSYNC_POSITIVE | DRM_EDID_PT_VSYNC_POSITIVE;
678
	}
679
 
680
	mode->flags |= (pt->misc & DRM_EDID_PT_HSYNC_POSITIVE) ?
681
		DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC;
682
	mode->flags |= (pt->misc & DRM_EDID_PT_VSYNC_POSITIVE) ?
683
		DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC;
684
 
685
	mode->width_mm = pt->width_mm_lo | (pt->width_height_mm_hi & 0xf0) << 4;
686
	mode->height_mm = pt->height_mm_lo | (pt->width_height_mm_hi & 0xf) << 8;
687
 
688
	if (quirks & EDID_QUIRK_DETAILED_IN_CM) {
689
		mode->width_mm *= 10;
690
		mode->height_mm *= 10;
691
	}
692
 
693
	if (quirks & EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE) {
694
		mode->width_mm = edid->width_cm * 10;
695
		mode->height_mm = edid->height_cm * 10;
696
	}
697
 
698
	return mode;
699
}
700
 
701
/*
702
 * Detailed mode info for the EDID "established modes" data to use.
703
 */
704
static struct drm_display_mode edid_est_modes[] = {
705
	{ DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 40000, 800, 840,
706
		   968, 1056, 0, 600, 601, 605, 628, 0,
707
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@60Hz */
708
	{ DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 36000, 800, 824,
709
		   896, 1024, 0, 600, 601, 603,  625, 0,
710
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@56Hz */
711
	{ DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 656,
712
		   720, 840, 0, 480, 481, 484, 500, 0,
713
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@75Hz */
714
	{ DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 664,
715
		   704,  832, 0, 480, 489, 491, 520, 0,
716
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@72Hz */
717
	{ DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 30240, 640, 704,
718
		   768,  864, 0, 480, 483, 486, 525, 0,
719
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@67Hz */
720
	{ DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 25200, 640, 656,
721
		   752, 800, 0, 480, 490, 492, 525, 0,
722
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@60Hz */
723
	{ DRM_MODE("720x400", DRM_MODE_TYPE_DRIVER, 35500, 720, 738,
724
		   846, 900, 0, 400, 421, 423,  449, 0,
725
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 720x400@88Hz */
726
	{ DRM_MODE("720x400", DRM_MODE_TYPE_DRIVER, 28320, 720, 738,
727
		   846,  900, 0, 400, 412, 414, 449, 0,
728
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 720x400@70Hz */
729
	{ DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 135000, 1280, 1296,
730
		   1440, 1688, 0, 1024, 1025, 1028, 1066, 0,
731
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 1280x1024@75Hz */
732
	{ DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 78800, 1024, 1040,
733
		   1136, 1312, 0,  768, 769, 772, 800, 0,
734
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 1024x768@75Hz */
735
	{ DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 75000, 1024, 1048,
736
		   1184, 1328, 0,  768, 771, 777, 806, 0,
737
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 1024x768@70Hz */
738
	{ DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 65000, 1024, 1048,
739
		   1184, 1344, 0,  768, 771, 777, 806, 0,
740
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 1024x768@60Hz */
741
	{ DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER,44900, 1024, 1032,
742
		   1208, 1264, 0, 768, 768, 776, 817, 0,
743
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC | DRM_MODE_FLAG_INTERLACE) }, /* 1024x768@43Hz */
744
	{ DRM_MODE("832x624", DRM_MODE_TYPE_DRIVER, 57284, 832, 864,
745
		   928, 1152, 0, 624, 625, 628, 667, 0,
746
		   DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 832x624@75Hz */
747
	{ DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 49500, 800, 816,
748
		   896, 1056, 0, 600, 601, 604,  625, 0,
749
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@75Hz */
750
	{ DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 50000, 800, 856,
751
		   976, 1040, 0, 600, 637, 643, 666, 0,
752
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@72Hz */
753
	{ DRM_MODE("1152x864", DRM_MODE_TYPE_DRIVER, 108000, 1152, 1216,
754
		   1344, 1600, 0,  864, 865, 868, 900, 0,
755
		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 1152x864@75Hz */
756
};
757
 
758
#define EDID_EST_TIMINGS 16
759
#define EDID_STD_TIMINGS 8
760
#define EDID_DETAILED_TIMINGS 4
761
 
762
/**
763
 * add_established_modes - get est. modes from EDID and add them
764
 * @edid: EDID block to scan
765
 *
766
 * Each EDID block contains a bitmap of the supported "established modes" list
767
 * (defined above).  Tease them out and add them to the global modes list.
768
 */
769
static int add_established_modes(struct drm_connector *connector, struct edid *edid)
770
{
771
	struct drm_device *dev = connector->dev;
772
	unsigned long est_bits = edid->established_timings.t1 |
773
		(edid->established_timings.t2 << 8) |
774
		((edid->established_timings.mfg_rsvd & 0x80) << 9);
775
	int i, modes = 0;
776
 
777
	for (i = 0; i <= EDID_EST_TIMINGS; i++)
778
		if (est_bits & (1<
779
			struct drm_display_mode *newmode;
780
			newmode = drm_mode_duplicate(dev, &edid_est_modes[i]);
781
			if (newmode) {
782
				drm_mode_probed_add(connector, newmode);
783
				modes++;
784
			}
785
		}
786
 
787
	return modes;
788
}
1179 serge 789
/**
790
 * stanard_timing_level - get std. timing level(CVT/GTF/DMT)
791
 * @edid: EDID block to scan
792
 */
793
static int standard_timing_level(struct edid *edid)
794
{
795
	if (edid->revision >= 2) {
796
		if (edid->revision >= 4 && (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF))
797
			return LEVEL_CVT;
798
		return LEVEL_GTF;
799
	}
800
	return LEVEL_DMT;
801
}
1123 serge 802
 
803
/**
804
 * add_standard_modes - get std. modes from EDID and add them
805
 * @edid: EDID block to scan
806
 *
807
 * Standard modes can be calculated using the CVT standard.  Grab them from
808
 * @edid, calculate them, and add them to the list.
809
 */
810
static int add_standard_modes(struct drm_connector *connector, struct edid *edid)
811
{
812
	struct drm_device *dev = connector->dev;
813
	int i, modes = 0;
1179 serge 814
	int timing_level;
1123 serge 815
 
1179 serge 816
	timing_level = standard_timing_level(edid);
817
 
1123 serge 818
	for (i = 0; i < EDID_STD_TIMINGS; i++) {
819
		struct std_timing *t = &edid->standard_timings[i];
820
		struct drm_display_mode *newmode;
821
 
822
		/* If std timings bytes are 1, 1 it's empty */
823
		if (t->hsize == 1 && t->vfreq_aspect == 1)
824
			continue;
825
 
1179 serge 826
		newmode = drm_mode_std(dev, &edid->standard_timings[i],
1221 serge 827
				       edid->revision, timing_level);
1123 serge 828
		if (newmode) {
829
			drm_mode_probed_add(connector, newmode);
830
			modes++;
831
		}
832
	}
833
 
834
	return modes;
835
}
836
 
837
/**
838
 * add_detailed_modes - get detailed mode info from EDID data
839
 * @connector: attached connector
840
 * @edid: EDID block to scan
841
 * @quirks: quirks to apply
842
 *
843
 * Some of the detailed timing sections may contain mode information.  Grab
844
 * it and add it to the list.
845
 */
846
static int add_detailed_info(struct drm_connector *connector,
847
			     struct edid *edid, u32 quirks)
848
{
849
	struct drm_device *dev = connector->dev;
850
	int i, j, modes = 0;
1179 serge 851
	int timing_level;
1123 serge 852
 
1179 serge 853
	timing_level = standard_timing_level(edid);
854
 
1123 serge 855
	for (i = 0; i < EDID_DETAILED_TIMINGS; i++) {
856
		struct detailed_timing *timing = &edid->detailed_timings[i];
857
		struct detailed_non_pixel *data = &timing->data.other_data;
858
		struct drm_display_mode *newmode;
859
 
1179 serge 860
		/* X server check is version 1.1 or higher */
861
		if (edid->version == 1 && edid->revision >= 1 &&
862
		    !timing->pixel_clock) {
863
		/* Other timing or info */
864
		switch (data->type) {
865
		case EDID_DETAIL_MONITOR_SERIAL:
866
			break;
867
		case EDID_DETAIL_MONITOR_STRING:
868
			break;
869
		case EDID_DETAIL_MONITOR_RANGE:
870
			/* Get monitor range data */
871
			break;
872
		case EDID_DETAIL_MONITOR_NAME:
873
			break;
874
		case EDID_DETAIL_MONITOR_CPDATA:
875
			break;
876
		case EDID_DETAIL_STD_MODES:
1221 serge 877
				for (j = 0; j < 6; i++) {
1179 serge 878
				struct std_timing *std;
879
				struct drm_display_mode *newmode;
1123 serge 880
 
1179 serge 881
				std = &data->data.timings[j];
882
					newmode = drm_mode_std(dev, std,
1221 serge 883
							       edid->revision,
1179 serge 884
							       timing_level);
885
				if (newmode) {
886
					drm_mode_probed_add(connector, newmode);
887
					modes++;
888
				}
889
			}
890
			break;
891
		default:
892
			break;
893
		}
894
		} else {
1123 serge 895
			newmode = drm_mode_detailed(dev, edid, timing, quirks);
896
			if (!newmode)
897
				continue;
898
 
899
			/* First detailed mode is preferred */
900
			if (i == 0 && (edid->features & DRM_EDID_FEATURE_PREFERRED_TIMING))
901
				newmode->type |= DRM_MODE_TYPE_PREFERRED;
902
			drm_mode_probed_add(connector, newmode);
903
 
904
			modes++;
1179 serge 905
		}
906
	}
907
 
908
	return modes;
909
}
910
/**
911
 * add_detailed_mode_eedid - get detailed mode info from addtional timing
912
 * 			EDID block
913
 * @connector: attached connector
914
 * @edid: EDID block to scan(It is only to get addtional timing EDID block)
915
 * @quirks: quirks to apply
916
 *
917
 * Some of the detailed timing sections may contain mode information.  Grab
918
 * it and add it to the list.
919
 */
920
static int add_detailed_info_eedid(struct drm_connector *connector,
921
			     struct edid *edid, u32 quirks)
922
{
923
	struct drm_device *dev = connector->dev;
924
	int i, j, modes = 0;
925
	char *edid_ext = NULL;
926
	struct detailed_timing *timing;
927
	struct detailed_non_pixel *data;
928
	struct drm_display_mode *newmode;
929
	int edid_ext_num;
930
	int start_offset, end_offset;
931
	int timing_level;
932
 
933
	if (edid->version == 1 && edid->revision < 3) {
934
		/* If the EDID version is less than 1.3, there is no
935
		 * extension EDID.
936
		 */
937
		return 0;
938
	}
939
	if (!edid->extensions) {
940
		/* if there is no extension EDID, it is unnecessary to
941
		 * parse the E-EDID to get detailed info
942
		 */
943
		return 0;
944
	}
945
 
946
	/* Chose real EDID extension number */
947
	edid_ext_num = edid->extensions > MAX_EDID_EXT_NUM ?
948
		       MAX_EDID_EXT_NUM : edid->extensions;
949
 
950
	/* Find CEA extension */
951
	for (i = 0; i < edid_ext_num; i++) {
952
		edid_ext = (char *)edid + EDID_LENGTH * (i + 1);
953
		/* This block is CEA extension */
954
		if (edid_ext[0] == 0x02)
955
			break;
956
	}
957
 
958
	if (i == edid_ext_num) {
959
		/* if there is no additional timing EDID block, return */
960
		return 0;
961
	}
962
 
963
	/* Get the start offset of detailed timing block */
964
	start_offset = edid_ext[2];
965
	if (start_offset == 0) {
966
		/* If the start_offset is zero, it means that neither detailed
967
		 * info nor data block exist. In such case it is also
968
		 * unnecessary to parse the detailed timing info.
969
		 */
970
		return 0;
971
	}
972
 
973
	timing_level = standard_timing_level(edid);
974
	end_offset = EDID_LENGTH;
975
	end_offset -= sizeof(struct detailed_timing);
976
	for (i = start_offset; i < end_offset;
977
			i += sizeof(struct detailed_timing)) {
978
		timing = (struct detailed_timing *)(edid_ext + i);
979
		data = &timing->data.other_data;
980
		/* Detailed mode timing */
981
		if (timing->pixel_clock) {
982
			newmode = drm_mode_detailed(dev, edid, timing, quirks);
983
			if (!newmode)
984
				continue;
985
 
986
			drm_mode_probed_add(connector, newmode);
987
 
988
			modes++;
1123 serge 989
			continue;
990
		}
991
 
992
		/* Other timing or info */
993
		switch (data->type) {
994
		case EDID_DETAIL_MONITOR_SERIAL:
995
			break;
996
		case EDID_DETAIL_MONITOR_STRING:
997
			break;
998
		case EDID_DETAIL_MONITOR_RANGE:
999
			/* Get monitor range data */
1000
			break;
1001
		case EDID_DETAIL_MONITOR_NAME:
1002
			break;
1003
		case EDID_DETAIL_MONITOR_CPDATA:
1004
			break;
1005
		case EDID_DETAIL_STD_MODES:
1006
			/* Five modes per detailed section */
1007
			for (j = 0; j < 5; i++) {
1008
				struct std_timing *std;
1009
				struct drm_display_mode *newmode;
1010
 
1011
				std = &data->data.timings[j];
1221 serge 1012
				newmode = drm_mode_std(dev, std,
1013
						       edid->revision,
1014
						       timing_level);
1123 serge 1015
				if (newmode) {
1016
					drm_mode_probed_add(connector, newmode);
1017
					modes++;
1018
				}
1019
			}
1020
			break;
1021
		default:
1022
			break;
1023
		}
1024
	}
1025
 
1026
	return modes;
1027
}
1028
 
1029
#define DDC_ADDR 0x50
1030
/**
1031
 * Get EDID information via I2C.
1032
 *
1033
 * \param adapter : i2c device adaptor
1034
 * \param buf     : EDID data buffer to be filled
1035
 * \param len     : EDID data buffer length
1036
 * \return 0 on success or -1 on failure.
1037
 *
1038
 * Try to fetch EDID information by calling i2c driver function.
1039
 */
1040
int drm_do_probe_ddc_edid(struct i2c_adapter *adapter,
1041
			  unsigned char *buf, int len)
1042
{
1043
	unsigned char start = 0x0;
1044
	struct i2c_msg msgs[] = {
1045
		{
1046
			.addr	= DDC_ADDR,
1047
			.flags	= 0,
1048
			.len	= 1,
1049
			.buf	= &start,
1050
		}, {
1051
			.addr	= DDC_ADDR,
1052
			.flags	= I2C_M_RD,
1053
			.len	= len,
1054
			.buf	= buf,
1055
		}
1056
	};
1057
 
1058
	if (i2c_transfer(adapter, msgs, 2) == 2)
1059
		return 0;
1060
 
1061
	return -1;
1062
}
1063
EXPORT_SYMBOL(drm_do_probe_ddc_edid);
1064
 
1065
static int drm_ddc_read_edid(struct drm_connector *connector,
1066
			     struct i2c_adapter *adapter,
1067
			     char *buf, int len)
1068
{
1069
	int ret;
1070
 
1071
	ret = drm_do_probe_ddc_edid(adapter, buf, len);
1072
	if (ret != 0) {
1073
		goto end;
1074
	}
1075
	if (!edid_is_valid((struct edid *)buf)) {
1246 serge 1076
		dev_warn(&connector->dev->pdev->dev, "%s: EDID invalid.\n",
1077
			 drm_get_connector_name(connector));
1123 serge 1078
		ret = -1;
1079
	}
1080
end:
1081
	return ret;
1082
}
1083
 
1084
/**
1085
 * drm_get_edid - get EDID data, if available
1086
 * @connector: connector we're probing
1087
 * @adapter: i2c adapter to use for DDC
1088
 *
1089
 * Poke the given connector's i2c channel to grab EDID data if possible.
1090
 *
1091
 * Return edid data or NULL if we couldn't find any.
1092
 */
1093
struct edid *drm_get_edid(struct drm_connector *connector,
1094
			  struct i2c_adapter *adapter)
1095
{
1096
	int ret;
1097
	struct edid *edid;
1098
 
1099
	edid = kmalloc(EDID_LENGTH * (MAX_EDID_EXT_NUM + 1),
1100
		       GFP_KERNEL);
1101
	if (edid == NULL) {
1246 serge 1102
		dev_warn(&connector->dev->pdev->dev,
1103
			 "Failed to allocate EDID\n");
1123 serge 1104
		goto end;
1105
	}
1106
 
1107
	/* Read first EDID block */
1108
	ret = drm_ddc_read_edid(connector, adapter,
1109
				(unsigned char *)edid, EDID_LENGTH);
1110
	if (ret != 0)
1111
		goto clean_up;
1112
 
1113
	/* There are EDID extensions to be read */
1114
	if (edid->extensions != 0) {
1115
		int edid_ext_num = edid->extensions;
1116
 
1117
		if (edid_ext_num > MAX_EDID_EXT_NUM) {
1246 serge 1118
			dev_warn(&connector->dev->pdev->dev,
1119
				 "The number of extension(%d) is "
1120
				 "over max (%d), actually read number (%d)\n",
1121
				 edid_ext_num, MAX_EDID_EXT_NUM,
1122
				 MAX_EDID_EXT_NUM);
1123 serge 1123
			/* Reset EDID extension number to be read */
1124
			edid_ext_num = MAX_EDID_EXT_NUM;
1125
		}
1126
		/* Read EDID including extensions too */
1127
		ret = drm_ddc_read_edid(connector, adapter, (char *)edid,
1128
					EDID_LENGTH * (edid_ext_num + 1));
1129
		if (ret != 0)
1130
			goto clean_up;
1131
 
1132
	}
1133
 
1134
	connector->display_info.raw_edid = (char *)edid;
1135
	goto end;
1136
 
1137
clean_up:
1138
	kfree(edid);
1139
	edid = NULL;
1140
end:
1141
	return edid;
1142
 
1143
}
1144
EXPORT_SYMBOL(drm_get_edid);
1145
 
1146
#define HDMI_IDENTIFIER 0x000C03
1147
#define VENDOR_BLOCK    0x03
1148
/**
1149
 * drm_detect_hdmi_monitor - detect whether monitor is hdmi.
1150
 * @edid: monitor EDID information
1151
 *
1152
 * Parse the CEA extension according to CEA-861-B.
1153
 * Return true if HDMI, false if not or unknown.
1154
 */
1155
bool drm_detect_hdmi_monitor(struct edid *edid)
1156
{
1157
	char *edid_ext = NULL;
1158
	int i, hdmi_id, edid_ext_num;
1159
	int start_offset, end_offset;
1160
	bool is_hdmi = false;
1161
 
1162
	/* No EDID or EDID extensions */
1163
	if (edid == NULL || edid->extensions == 0)
1164
		goto end;
1165
 
1166
	/* Chose real EDID extension number */
1167
	edid_ext_num = edid->extensions > MAX_EDID_EXT_NUM ?
1168
		       MAX_EDID_EXT_NUM : edid->extensions;
1169
 
1170
	/* Find CEA extension */
1171
	for (i = 0; i < edid_ext_num; i++) {
1172
		edid_ext = (char *)edid + EDID_LENGTH * (i + 1);
1173
		/* This block is CEA extension */
1174
		if (edid_ext[0] == 0x02)
1175
			break;
1176
	}
1177
 
1178
	if (i == edid_ext_num)
1179
		goto end;
1180
 
1181
	/* Data block offset in CEA extension block */
1182
	start_offset = 4;
1183
	end_offset = edid_ext[2];
1184
 
1185
	/*
1186
	 * Because HDMI identifier is in Vendor Specific Block,
1187
	 * search it from all data blocks of CEA extension.
1188
	 */
1189
	for (i = start_offset; i < end_offset;
1190
		/* Increased by data block len */
1191
		i += ((edid_ext[i] & 0x1f) + 1)) {
1192
		/* Find vendor specific block */
1193
		if ((edid_ext[i] >> 5) == VENDOR_BLOCK) {
1194
			hdmi_id = edid_ext[i + 1] | (edid_ext[i + 2] << 8) |
1195
				  edid_ext[i + 3] << 16;
1196
			/* Find HDMI identifier */
1197
			if (hdmi_id == HDMI_IDENTIFIER)
1198
				is_hdmi = true;
1199
			break;
1200
		}
1201
	}
1202
 
1203
end:
1204
	return is_hdmi;
1205
}
1206
EXPORT_SYMBOL(drm_detect_hdmi_monitor);
1207
 
1208
/**
1209
 * drm_add_edid_modes - add modes from EDID data, if available
1210
 * @connector: connector we're probing
1211
 * @edid: edid data
1212
 *
1213
 * Add the specified modes to the connector's mode list.
1214
 *
1215
 * Return number of modes added or 0 if we couldn't find any.
1216
 */
1217
int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid)
1218
{
1219
	int num_modes = 0;
1220
	u32 quirks;
1221
 
1222
	if (edid == NULL) {
1223
		return 0;
1224
	}
1225
	if (!edid_is_valid(edid)) {
1246 serge 1226
		dev_warn(&connector->dev->pdev->dev, "%s: EDID invalid.\n",
1227
			 drm_get_connector_name(connector));
1123 serge 1228
		return 0;
1229
	}
1230
 
1231
	quirks = edid_get_quirks(edid);
1232
 
1233
	num_modes += add_established_modes(connector, edid);
1234
	num_modes += add_standard_modes(connector, edid);
1235
	num_modes += add_detailed_info(connector, edid, quirks);
1179 serge 1236
	num_modes += add_detailed_info_eedid(connector, edid, quirks);
1123 serge 1237
 
1238
	if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75))
1239
		edid_fixup_preferred(connector, quirks);
1240
 
1241
	connector->display_info.serration_vsync = (edid->input & DRM_EDID_INPUT_SERRATION_VSYNC) ? 1 : 0;
1242
	connector->display_info.sync_on_green = (edid->input & DRM_EDID_INPUT_SYNC_ON_GREEN) ? 1 : 0;
1243
	connector->display_info.composite_sync = (edid->input & DRM_EDID_INPUT_COMPOSITE_SYNC) ? 1 : 0;
1244
	connector->display_info.separate_syncs = (edid->input & DRM_EDID_INPUT_SEPARATE_SYNCS) ? 1 : 0;
1245
	connector->display_info.blank_to_black = (edid->input & DRM_EDID_INPUT_BLANK_TO_BLACK) ? 1 : 0;
1246
	connector->display_info.video_level = (edid->input & DRM_EDID_INPUT_VIDEO_LEVEL) >> 5;
1247
	connector->display_info.digital = (edid->input & DRM_EDID_INPUT_DIGITAL) ? 1 : 0;
1248
	connector->display_info.width_mm = edid->width_cm * 10;
1249
	connector->display_info.height_mm = edid->height_cm * 10;
1250
	connector->display_info.gamma = edid->gamma;
1251
	connector->display_info.gtf_supported = (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF) ? 1 : 0;
1252
	connector->display_info.standard_color = (edid->features & DRM_EDID_FEATURE_STANDARD_COLOR) ? 1 : 0;
1253
	connector->display_info.display_type = (edid->features & DRM_EDID_FEATURE_DISPLAY_TYPE) >> 3;
1254
	connector->display_info.active_off_supported = (edid->features & DRM_EDID_FEATURE_PM_ACTIVE_OFF) ? 1 : 0;
1255
	connector->display_info.suspend_supported = (edid->features & DRM_EDID_FEATURE_PM_SUSPEND) ? 1 : 0;
1256
	connector->display_info.standby_supported = (edid->features & DRM_EDID_FEATURE_PM_STANDBY) ? 1 : 0;
1257
	connector->display_info.gamma = edid->gamma;
1258
 
1259
	return num_modes;
1260
}
1261
EXPORT_SYMBOL(drm_add_edid_modes);
1179 serge 1262
 
1263
/**
1264
 * drm_add_modes_noedid - add modes for the connectors without EDID
1265
 * @connector: connector we're probing
1266
 * @hdisplay: the horizontal display limit
1267
 * @vdisplay: the vertical display limit
1268
 *
1269
 * Add the specified modes to the connector's mode list. Only when the
1270
 * hdisplay/vdisplay is not beyond the given limit, it will be added.
1271
 *
1272
 * Return number of modes added or 0 if we couldn't find any.
1273
 */
1274
int drm_add_modes_noedid(struct drm_connector *connector,
1275
			int hdisplay, int vdisplay)
1276
{
1277
	int i, count, num_modes = 0;
1278
	struct drm_display_mode *mode, *ptr;
1279
	struct drm_device *dev = connector->dev;
1280
 
1281
	count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
1282
	if (hdisplay < 0)
1283
		hdisplay = 0;
1284
	if (vdisplay < 0)
1285
		vdisplay = 0;
1286
 
1287
	for (i = 0; i < count; i++) {
1288
		ptr = &drm_dmt_modes[i];
1289
		if (hdisplay && vdisplay) {
1290
			/*
1291
			 * Only when two are valid, they will be used to check
1292
			 * whether the mode should be added to the mode list of
1293
			 * the connector.
1294
			 */
1295
			if (ptr->hdisplay > hdisplay ||
1296
					ptr->vdisplay > vdisplay)
1297
				continue;
1298
		}
1299
		mode = drm_mode_duplicate(dev, ptr);
1300
		if (mode) {
1301
			drm_mode_probed_add(connector, mode);
1302
			num_modes++;
1303
		}
1304
	}
1305
	return num_modes;
1306
}
1307
EXPORT_SYMBOL(drm_add_modes_noedid);