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[deliverable/linux.git] / drivers / gpu / drm / drm_edid.c
1 /*
2 * Copyright (c) 2006 Luc Verhaegen (quirks list)
3 * Copyright (c) 2007-2008 Intel Corporation
4 * Jesse Barnes <jesse.barnes@intel.com>
5 * Copyright 2010 Red Hat, Inc.
6 *
7 * DDC probing routines (drm_ddc_read & drm_do_probe_ddc_edid) originally from
8 * FB layer.
9 * Copyright (C) 2006 Dennis Munsie <dmunsie@cecropia.com>
10 *
11 * Permission is hereby granted, free of charge, to any person obtaining a
12 * copy of this software and associated documentation files (the "Software"),
13 * to deal in the Software without restriction, including without limitation
14 * the rights to use, copy, modify, merge, publish, distribute, sub license,
15 * and/or sell copies of the Software, and to permit persons to whom the
16 * Software is furnished to do so, subject to the following conditions:
17 *
18 * The above copyright notice and this permission notice (including the
19 * next paragraph) shall be included in all copies or substantial portions
20 * of the Software.
21 *
22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
23 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
24 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
25 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
26 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
27 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
28 * DEALINGS IN THE SOFTWARE.
29 */
30 #include <linux/kernel.h>
31 #include <linux/i2c.h>
32 #include <linux/i2c-algo-bit.h>
33 #include "drmP.h"
34 #include "drm_edid.h"
35
36 /*
37 * EDID blocks out in the wild have a variety of bugs, try to collect
38 * them here (note that userspace may work around broken monitors first,
39 * but fixes should make their way here so that the kernel "just works"
40 * on as many displays as possible).
41 */
42
43 /* First detailed mode wrong, use largest 60Hz mode */
44 #define EDID_QUIRK_PREFER_LARGE_60 (1 << 0)
45 /* Reported 135MHz pixel clock is too high, needs adjustment */
46 #define EDID_QUIRK_135_CLOCK_TOO_HIGH (1 << 1)
47 /* Prefer the largest mode at 75 Hz */
48 #define EDID_QUIRK_PREFER_LARGE_75 (1 << 2)
49 /* Detail timing is in cm not mm */
50 #define EDID_QUIRK_DETAILED_IN_CM (1 << 3)
51 /* Detailed timing descriptors have bogus size values, so just take the
52 * maximum size and use that.
53 */
54 #define EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE (1 << 4)
55 /* Monitor forgot to set the first detailed is preferred bit. */
56 #define EDID_QUIRK_FIRST_DETAILED_PREFERRED (1 << 5)
57 /* use +hsync +vsync for detailed mode */
58 #define EDID_QUIRK_DETAILED_SYNC_PP (1 << 6)
59
60
61 #define LEVEL_DMT 0
62 #define LEVEL_GTF 1
63 #define LEVEL_CVT 2
64
65 static struct edid_quirk {
66 char *vendor;
67 int product_id;
68 u32 quirks;
69 } edid_quirk_list[] = {
70 /* Acer AL1706 */
71 { "ACR", 44358, EDID_QUIRK_PREFER_LARGE_60 },
72 /* Acer F51 */
73 { "API", 0x7602, EDID_QUIRK_PREFER_LARGE_60 },
74 /* Unknown Acer */
75 { "ACR", 2423, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
76
77 /* Belinea 10 15 55 */
78 { "MAX", 1516, EDID_QUIRK_PREFER_LARGE_60 },
79 { "MAX", 0x77e, EDID_QUIRK_PREFER_LARGE_60 },
80
81 /* Envision Peripherals, Inc. EN-7100e */
82 { "EPI", 59264, EDID_QUIRK_135_CLOCK_TOO_HIGH },
83
84 /* Funai Electronics PM36B */
85 { "FCM", 13600, EDID_QUIRK_PREFER_LARGE_75 |
86 EDID_QUIRK_DETAILED_IN_CM },
87
88 /* LG Philips LCD LP154W01-A5 */
89 { "LPL", 0, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
90 { "LPL", 0x2a00, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
91
92 /* Philips 107p5 CRT */
93 { "PHL", 57364, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
94
95 /* Proview AY765C */
96 { "PTS", 765, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
97
98 /* Samsung SyncMaster 205BW. Note: irony */
99 { "SAM", 541, EDID_QUIRK_DETAILED_SYNC_PP },
100 /* Samsung SyncMaster 22[5-6]BW */
101 { "SAM", 596, EDID_QUIRK_PREFER_LARGE_60 },
102 { "SAM", 638, EDID_QUIRK_PREFER_LARGE_60 },
103 };
104
105 /*** DDC fetch and block validation ***/
106
107 static const u8 edid_header[] = {
108 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00
109 };
110
111 /*
112 * Sanity check the EDID block (base or extension). Return 0 if the block
113 * doesn't check out, or 1 if it's valid.
114 */
115 static bool
116 drm_edid_block_valid(u8 *raw_edid)
117 {
118 int i;
119 u8 csum = 0;
120 struct edid *edid = (struct edid *)raw_edid;
121
122 if (raw_edid[0] == 0x00) {
123 int score = 0;
124
125 for (i = 0; i < sizeof(edid_header); i++)
126 if (raw_edid[i] == edid_header[i])
127 score++;
128
129 if (score == 8) ;
130 else if (score >= 6) {
131 DRM_DEBUG("Fixing EDID header, your hardware may be failing\n");
132 memcpy(raw_edid, edid_header, sizeof(edid_header));
133 } else {
134 goto bad;
135 }
136 }
137
138 for (i = 0; i < EDID_LENGTH; i++)
139 csum += raw_edid[i];
140 if (csum) {
141 DRM_ERROR("EDID checksum is invalid, remainder is %d\n", csum);
142 goto bad;
143 }
144
145 /* per-block-type checks */
146 switch (raw_edid[0]) {
147 case 0: /* base */
148 if (edid->version != 1) {
149 DRM_ERROR("EDID has major version %d, instead of 1\n", edid->version);
150 goto bad;
151 }
152
153 if (edid->revision > 4)
154 DRM_DEBUG("EDID minor > 4, assuming backward compatibility\n");
155 break;
156
157 default:
158 break;
159 }
160
161 return 1;
162
163 bad:
164 if (raw_edid) {
165 DRM_ERROR("Raw EDID:\n");
166 print_hex_dump_bytes(KERN_ERR, DUMP_PREFIX_NONE, raw_edid, EDID_LENGTH);
167 printk("\n");
168 }
169 return 0;
170 }
171
172 /**
173 * drm_edid_is_valid - sanity check EDID data
174 * @edid: EDID data
175 *
176 * Sanity-check an entire EDID record (including extensions)
177 */
178 bool drm_edid_is_valid(struct edid *edid)
179 {
180 int i;
181 u8 *raw = (u8 *)edid;
182
183 if (!edid)
184 return false;
185
186 for (i = 0; i <= edid->extensions; i++)
187 if (!drm_edid_block_valid(raw + i * EDID_LENGTH))
188 return false;
189
190 return true;
191 }
192 EXPORT_SYMBOL(drm_edid_is_valid);
193
194 #define DDC_ADDR 0x50
195 #define DDC_SEGMENT_ADDR 0x30
196 /**
197 * Get EDID information via I2C.
198 *
199 * \param adapter : i2c device adaptor
200 * \param buf : EDID data buffer to be filled
201 * \param len : EDID data buffer length
202 * \return 0 on success or -1 on failure.
203 *
204 * Try to fetch EDID information by calling i2c driver function.
205 */
206 static int
207 drm_do_probe_ddc_edid(struct i2c_adapter *adapter, unsigned char *buf,
208 int block, int len)
209 {
210 unsigned char start = block * EDID_LENGTH;
211 struct i2c_msg msgs[] = {
212 {
213 .addr = DDC_ADDR,
214 .flags = 0,
215 .len = 1,
216 .buf = &start,
217 }, {
218 .addr = DDC_ADDR,
219 .flags = I2C_M_RD,
220 .len = len,
221 .buf = buf + start,
222 }
223 };
224
225 if (i2c_transfer(adapter, msgs, 2) == 2)
226 return 0;
227
228 return -1;
229 }
230
231 static u8 *
232 drm_do_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter)
233 {
234 int i, j = 0;
235 u8 *block, *new;
236
237 if ((block = kmalloc(EDID_LENGTH, GFP_KERNEL)) == NULL)
238 return NULL;
239
240 /* base block fetch */
241 for (i = 0; i < 4; i++) {
242 if (drm_do_probe_ddc_edid(adapter, block, 0, EDID_LENGTH))
243 goto out;
244 if (drm_edid_block_valid(block))
245 break;
246 }
247 if (i == 4)
248 goto carp;
249
250 /* if there's no extensions, we're done */
251 if (block[0x7e] == 0)
252 return block;
253
254 new = krealloc(block, (block[0x7e] + 1) * EDID_LENGTH, GFP_KERNEL);
255 if (!new)
256 goto out;
257 block = new;
258
259 for (j = 1; j <= block[0x7e]; j++) {
260 for (i = 0; i < 4; i++) {
261 if (drm_do_probe_ddc_edid(adapter, block, j,
262 EDID_LENGTH))
263 goto out;
264 if (drm_edid_block_valid(block + j * EDID_LENGTH))
265 break;
266 }
267 if (i == 4)
268 goto carp;
269 }
270
271 return block;
272
273 carp:
274 dev_warn(&connector->dev->pdev->dev, "%s: EDID block %d invalid.\n",
275 drm_get_connector_name(connector), j);
276
277 out:
278 kfree(block);
279 return NULL;
280 }
281
282 /**
283 * Probe DDC presence.
284 *
285 * \param adapter : i2c device adaptor
286 * \return 1 on success
287 */
288 static bool
289 drm_probe_ddc(struct i2c_adapter *adapter)
290 {
291 unsigned char out;
292
293 return (drm_do_probe_ddc_edid(adapter, &out, 0, 1) == 0);
294 }
295
296 /**
297 * drm_get_edid - get EDID data, if available
298 * @connector: connector we're probing
299 * @adapter: i2c adapter to use for DDC
300 *
301 * Poke the given i2c channel to grab EDID data if possible. If found,
302 * attach it to the connector.
303 *
304 * Return edid data or NULL if we couldn't find any.
305 */
306 struct edid *drm_get_edid(struct drm_connector *connector,
307 struct i2c_adapter *adapter)
308 {
309 struct edid *edid = NULL;
310
311 if (drm_probe_ddc(adapter))
312 edid = (struct edid *)drm_do_get_edid(connector, adapter);
313
314 connector->display_info.raw_edid = (char *)edid;
315
316 return edid;
317
318 }
319 EXPORT_SYMBOL(drm_get_edid);
320
321 /*** EDID parsing ***/
322
323 /**
324 * edid_vendor - match a string against EDID's obfuscated vendor field
325 * @edid: EDID to match
326 * @vendor: vendor string
327 *
328 * Returns true if @vendor is in @edid, false otherwise
329 */
330 static bool edid_vendor(struct edid *edid, char *vendor)
331 {
332 char edid_vendor[3];
333
334 edid_vendor[0] = ((edid->mfg_id[0] & 0x7c) >> 2) + '@';
335 edid_vendor[1] = (((edid->mfg_id[0] & 0x3) << 3) |
336 ((edid->mfg_id[1] & 0xe0) >> 5)) + '@';
337 edid_vendor[2] = (edid->mfg_id[1] & 0x1f) + '@';
338
339 return !strncmp(edid_vendor, vendor, 3);
340 }
341
342 /**
343 * edid_get_quirks - return quirk flags for a given EDID
344 * @edid: EDID to process
345 *
346 * This tells subsequent routines what fixes they need to apply.
347 */
348 static u32 edid_get_quirks(struct edid *edid)
349 {
350 struct edid_quirk *quirk;
351 int i;
352
353 for (i = 0; i < ARRAY_SIZE(edid_quirk_list); i++) {
354 quirk = &edid_quirk_list[i];
355
356 if (edid_vendor(edid, quirk->vendor) &&
357 (EDID_PRODUCT_ID(edid) == quirk->product_id))
358 return quirk->quirks;
359 }
360
361 return 0;
362 }
363
364 #define MODE_SIZE(m) ((m)->hdisplay * (m)->vdisplay)
365 #define MODE_REFRESH_DIFF(m,r) (abs((m)->vrefresh - target_refresh))
366
367
368 /**
369 * edid_fixup_preferred - set preferred modes based on quirk list
370 * @connector: has mode list to fix up
371 * @quirks: quirks list
372 *
373 * Walk the mode list for @connector, clearing the preferred status
374 * on existing modes and setting it anew for the right mode ala @quirks.
375 */
376 static void edid_fixup_preferred(struct drm_connector *connector,
377 u32 quirks)
378 {
379 struct drm_display_mode *t, *cur_mode, *preferred_mode;
380 int target_refresh = 0;
381
382 if (list_empty(&connector->probed_modes))
383 return;
384
385 if (quirks & EDID_QUIRK_PREFER_LARGE_60)
386 target_refresh = 60;
387 if (quirks & EDID_QUIRK_PREFER_LARGE_75)
388 target_refresh = 75;
389
390 preferred_mode = list_first_entry(&connector->probed_modes,
391 struct drm_display_mode, head);
392
393 list_for_each_entry_safe(cur_mode, t, &connector->probed_modes, head) {
394 cur_mode->type &= ~DRM_MODE_TYPE_PREFERRED;
395
396 if (cur_mode == preferred_mode)
397 continue;
398
399 /* Largest mode is preferred */
400 if (MODE_SIZE(cur_mode) > MODE_SIZE(preferred_mode))
401 preferred_mode = cur_mode;
402
403 /* At a given size, try to get closest to target refresh */
404 if ((MODE_SIZE(cur_mode) == MODE_SIZE(preferred_mode)) &&
405 MODE_REFRESH_DIFF(cur_mode, target_refresh) <
406 MODE_REFRESH_DIFF(preferred_mode, target_refresh)) {
407 preferred_mode = cur_mode;
408 }
409 }
410
411 preferred_mode->type |= DRM_MODE_TYPE_PREFERRED;
412 }
413
414 /*
415 * Add the Autogenerated from the DMT spec.
416 * This table is copied from xfree86/modes/xf86EdidModes.c.
417 * But the mode with Reduced blank feature is deleted.
418 */
419 static struct drm_display_mode drm_dmt_modes[] = {
420 /* 640x350@85Hz */
421 { DRM_MODE("640x350", DRM_MODE_TYPE_DRIVER, 31500, 640, 672,
422 736, 832, 0, 350, 382, 385, 445, 0,
423 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC) },
424 /* 640x400@85Hz */
425 { DRM_MODE("640x400", DRM_MODE_TYPE_DRIVER, 31500, 640, 672,
426 736, 832, 0, 400, 401, 404, 445, 0,
427 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
428 /* 720x400@85Hz */
429 { DRM_MODE("720x400", DRM_MODE_TYPE_DRIVER, 35500, 720, 756,
430 828, 936, 0, 400, 401, 404, 446, 0,
431 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
432 /* 640x480@60Hz */
433 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 25175, 640, 656,
434 752, 800, 0, 480, 489, 492, 525, 0,
435 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
436 /* 640x480@72Hz */
437 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 664,
438 704, 832, 0, 480, 489, 492, 520, 0,
439 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
440 /* 640x480@75Hz */
441 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 656,
442 720, 840, 0, 480, 481, 484, 500, 0,
443 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
444 /* 640x480@85Hz */
445 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 36000, 640, 696,
446 752, 832, 0, 480, 481, 484, 509, 0,
447 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
448 /* 800x600@56Hz */
449 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 36000, 800, 824,
450 896, 1024, 0, 600, 601, 603, 625, 0,
451 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
452 /* 800x600@60Hz */
453 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 40000, 800, 840,
454 968, 1056, 0, 600, 601, 605, 628, 0,
455 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
456 /* 800x600@72Hz */
457 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 50000, 800, 856,
458 976, 1040, 0, 600, 637, 643, 666, 0,
459 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
460 /* 800x600@75Hz */
461 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 49500, 800, 816,
462 896, 1056, 0, 600, 601, 604, 625, 0,
463 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
464 /* 800x600@85Hz */
465 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 56250, 800, 832,
466 896, 1048, 0, 600, 601, 604, 631, 0,
467 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
468 /* 848x480@60Hz */
469 { DRM_MODE("848x480", DRM_MODE_TYPE_DRIVER, 33750, 848, 864,
470 976, 1088, 0, 480, 486, 494, 517, 0,
471 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
472 /* 1024x768@43Hz, interlace */
473 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 44900, 1024, 1032,
474 1208, 1264, 0, 768, 768, 772, 817, 0,
475 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC |
476 DRM_MODE_FLAG_INTERLACE) },
477 /* 1024x768@60Hz */
478 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 65000, 1024, 1048,
479 1184, 1344, 0, 768, 771, 777, 806, 0,
480 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
481 /* 1024x768@70Hz */
482 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 75000, 1024, 1048,
483 1184, 1328, 0, 768, 771, 777, 806, 0,
484 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) },
485 /* 1024x768@75Hz */
486 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 78750, 1024, 1040,
487 1136, 1312, 0, 768, 769, 772, 800, 0,
488 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
489 /* 1024x768@85Hz */
490 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 94500, 1024, 1072,
491 1072, 1376, 0, 768, 769, 772, 808, 0,
492 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
493 /* 1152x864@75Hz */
494 { DRM_MODE("1152x864", DRM_MODE_TYPE_DRIVER, 108000, 1152, 1216,
495 1344, 1600, 0, 864, 865, 868, 900, 0,
496 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
497 /* 1280x768@60Hz */
498 { DRM_MODE("1280x768", DRM_MODE_TYPE_DRIVER, 79500, 1280, 1344,
499 1472, 1664, 0, 768, 771, 778, 798, 0,
500 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
501 /* 1280x768@75Hz */
502 { DRM_MODE("1280x768", DRM_MODE_TYPE_DRIVER, 102250, 1280, 1360,
503 1488, 1696, 0, 768, 771, 778, 805, 0,
504 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC) },
505 /* 1280x768@85Hz */
506 { DRM_MODE("1280x768", DRM_MODE_TYPE_DRIVER, 117500, 1280, 1360,
507 1496, 1712, 0, 768, 771, 778, 809, 0,
508 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
509 /* 1280x800@60Hz */
510 { DRM_MODE("1280x800", DRM_MODE_TYPE_DRIVER, 83500, 1280, 1352,
511 1480, 1680, 0, 800, 803, 809, 831, 0,
512 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC) },
513 /* 1280x800@75Hz */
514 { DRM_MODE("1280x800", DRM_MODE_TYPE_DRIVER, 106500, 1280, 1360,
515 1488, 1696, 0, 800, 803, 809, 838, 0,
516 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
517 /* 1280x800@85Hz */
518 { DRM_MODE("1280x800", DRM_MODE_TYPE_DRIVER, 122500, 1280, 1360,
519 1496, 1712, 0, 800, 803, 809, 843, 0,
520 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
521 /* 1280x960@60Hz */
522 { DRM_MODE("1280x960", DRM_MODE_TYPE_DRIVER, 108000, 1280, 1376,
523 1488, 1800, 0, 960, 961, 964, 1000, 0,
524 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
525 /* 1280x960@85Hz */
526 { DRM_MODE("1280x960", DRM_MODE_TYPE_DRIVER, 148500, 1280, 1344,
527 1504, 1728, 0, 960, 961, 964, 1011, 0,
528 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
529 /* 1280x1024@60Hz */
530 { DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 108000, 1280, 1328,
531 1440, 1688, 0, 1024, 1025, 1028, 1066, 0,
532 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
533 /* 1280x1024@75Hz */
534 { DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 135000, 1280, 1296,
535 1440, 1688, 0, 1024, 1025, 1028, 1066, 0,
536 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
537 /* 1280x1024@85Hz */
538 { DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 157500, 1280, 1344,
539 1504, 1728, 0, 1024, 1025, 1028, 1072, 0,
540 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
541 /* 1360x768@60Hz */
542 { DRM_MODE("1360x768", DRM_MODE_TYPE_DRIVER, 85500, 1360, 1424,
543 1536, 1792, 0, 768, 771, 777, 795, 0,
544 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
545 /* 1440x1050@60Hz */
546 { DRM_MODE("1400x1050", DRM_MODE_TYPE_DRIVER, 121750, 1400, 1488,
547 1632, 1864, 0, 1050, 1053, 1057, 1089, 0,
548 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
549 /* 1440x1050@75Hz */
550 { DRM_MODE("1400x1050", DRM_MODE_TYPE_DRIVER, 156000, 1400, 1504,
551 1648, 1896, 0, 1050, 1053, 1057, 1099, 0,
552 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
553 /* 1440x1050@85Hz */
554 { DRM_MODE("1400x1050", DRM_MODE_TYPE_DRIVER, 179500, 1400, 1504,
555 1656, 1912, 0, 1050, 1053, 1057, 1105, 0,
556 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
557 /* 1440x900@60Hz */
558 { DRM_MODE("1440x900", DRM_MODE_TYPE_DRIVER, 106500, 1440, 1520,
559 1672, 1904, 0, 900, 903, 909, 934, 0,
560 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
561 /* 1440x900@75Hz */
562 { DRM_MODE("1440x900", DRM_MODE_TYPE_DRIVER, 136750, 1440, 1536,
563 1688, 1936, 0, 900, 903, 909, 942, 0,
564 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
565 /* 1440x900@85Hz */
566 { DRM_MODE("1440x900", DRM_MODE_TYPE_DRIVER, 157000, 1440, 1544,
567 1696, 1952, 0, 900, 903, 909, 948, 0,
568 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
569 /* 1600x1200@60Hz */
570 { DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 162000, 1600, 1664,
571 1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
572 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
573 /* 1600x1200@65Hz */
574 { DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 175500, 1600, 1664,
575 1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
576 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
577 /* 1600x1200@70Hz */
578 { DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 189000, 1600, 1664,
579 1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
580 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
581 /* 1600x1200@75Hz */
582 { DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 2025000, 1600, 1664,
583 1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
584 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
585 /* 1600x1200@85Hz */
586 { DRM_MODE("1600x1200", DRM_MODE_TYPE_DRIVER, 229500, 1600, 1664,
587 1856, 2160, 0, 1200, 1201, 1204, 1250, 0,
588 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
589 /* 1680x1050@60Hz */
590 { DRM_MODE("1680x1050", DRM_MODE_TYPE_DRIVER, 146250, 1680, 1784,
591 1960, 2240, 0, 1050, 1053, 1059, 1089, 0,
592 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
593 /* 1680x1050@75Hz */
594 { DRM_MODE("1680x1050", DRM_MODE_TYPE_DRIVER, 187000, 1680, 1800,
595 1976, 2272, 0, 1050, 1053, 1059, 1099, 0,
596 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
597 /* 1680x1050@85Hz */
598 { DRM_MODE("1680x1050", DRM_MODE_TYPE_DRIVER, 214750, 1680, 1808,
599 1984, 2288, 0, 1050, 1053, 1059, 1105, 0,
600 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
601 /* 1792x1344@60Hz */
602 { DRM_MODE("1792x1344", DRM_MODE_TYPE_DRIVER, 204750, 1792, 1920,
603 2120, 2448, 0, 1344, 1345, 1348, 1394, 0,
604 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
605 /* 1729x1344@75Hz */
606 { DRM_MODE("1792x1344", DRM_MODE_TYPE_DRIVER, 261000, 1792, 1888,
607 2104, 2456, 0, 1344, 1345, 1348, 1417, 0,
608 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
609 /* 1853x1392@60Hz */
610 { DRM_MODE("1856x1392", DRM_MODE_TYPE_DRIVER, 218250, 1856, 1952,
611 2176, 2528, 0, 1392, 1393, 1396, 1439, 0,
612 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
613 /* 1856x1392@75Hz */
614 { DRM_MODE("1856x1392", DRM_MODE_TYPE_DRIVER, 288000, 1856, 1984,
615 2208, 2560, 0, 1392, 1395, 1399, 1500, 0,
616 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
617 /* 1920x1200@60Hz */
618 { DRM_MODE("1920x1200", DRM_MODE_TYPE_DRIVER, 193250, 1920, 2056,
619 2256, 2592, 0, 1200, 1203, 1209, 1245, 0,
620 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
621 /* 1920x1200@75Hz */
622 { DRM_MODE("1920x1200", DRM_MODE_TYPE_DRIVER, 245250, 1920, 2056,
623 2264, 2608, 0, 1200, 1203, 1209, 1255, 0,
624 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
625 /* 1920x1200@85Hz */
626 { DRM_MODE("1920x1200", DRM_MODE_TYPE_DRIVER, 281250, 1920, 2064,
627 2272, 2624, 0, 1200, 1203, 1209, 1262, 0,
628 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
629 /* 1920x1440@60Hz */
630 { DRM_MODE("1920x1440", DRM_MODE_TYPE_DRIVER, 234000, 1920, 2048,
631 2256, 2600, 0, 1440, 1441, 1444, 1500, 0,
632 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
633 /* 1920x1440@75Hz */
634 { DRM_MODE("1920x1440", DRM_MODE_TYPE_DRIVER, 297000, 1920, 2064,
635 2288, 2640, 0, 1440, 1441, 1444, 1500, 0,
636 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
637 /* 2560x1600@60Hz */
638 { DRM_MODE("2560x1600", DRM_MODE_TYPE_DRIVER, 348500, 2560, 2752,
639 3032, 3504, 0, 1600, 1603, 1609, 1658, 0,
640 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
641 /* 2560x1600@75HZ */
642 { DRM_MODE("2560x1600", DRM_MODE_TYPE_DRIVER, 443250, 2560, 2768,
643 3048, 3536, 0, 1600, 1603, 1609, 1672, 0,
644 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
645 /* 2560x1600@85HZ */
646 { DRM_MODE("2560x1600", DRM_MODE_TYPE_DRIVER, 505250, 2560, 2768,
647 3048, 3536, 0, 1600, 1603, 1609, 1682, 0,
648 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
649 };
650 static const int drm_num_dmt_modes =
651 sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
652
653 static struct drm_display_mode *drm_find_dmt(struct drm_device *dev,
654 int hsize, int vsize, int fresh)
655 {
656 int i;
657 struct drm_display_mode *ptr, *mode;
658
659 mode = NULL;
660 for (i = 0; i < drm_num_dmt_modes; i++) {
661 ptr = &drm_dmt_modes[i];
662 if (hsize == ptr->hdisplay &&
663 vsize == ptr->vdisplay &&
664 fresh == drm_mode_vrefresh(ptr)) {
665 /* get the expected default mode */
666 mode = drm_mode_duplicate(dev, ptr);
667 break;
668 }
669 }
670 return mode;
671 }
672
673 /*
674 * 0 is reserved. The spec says 0x01 fill for unused timings. Some old
675 * monitors fill with ascii space (0x20) instead.
676 */
677 static int
678 bad_std_timing(u8 a, u8 b)
679 {
680 return (a == 0x00 && b == 0x00) ||
681 (a == 0x01 && b == 0x01) ||
682 (a == 0x20 && b == 0x20);
683 }
684
685 /**
686 * drm_mode_std - convert standard mode info (width, height, refresh) into mode
687 * @t: standard timing params
688 * @timing_level: standard timing level
689 *
690 * Take the standard timing params (in this case width, aspect, and refresh)
691 * and convert them into a real mode using CVT/GTF/DMT.
692 */
693 struct drm_display_mode *drm_mode_std(struct drm_device *dev,
694 struct std_timing *t,
695 int revision,
696 int timing_level)
697 {
698 struct drm_display_mode *mode;
699 int hsize, vsize;
700 int vrefresh_rate;
701 unsigned aspect_ratio = (t->vfreq_aspect & EDID_TIMING_ASPECT_MASK)
702 >> EDID_TIMING_ASPECT_SHIFT;
703 unsigned vfreq = (t->vfreq_aspect & EDID_TIMING_VFREQ_MASK)
704 >> EDID_TIMING_VFREQ_SHIFT;
705
706 if (bad_std_timing(t->hsize, t->vfreq_aspect))
707 return NULL;
708
709 /* According to the EDID spec, the hdisplay = hsize * 8 + 248 */
710 hsize = t->hsize * 8 + 248;
711 /* vrefresh_rate = vfreq + 60 */
712 vrefresh_rate = vfreq + 60;
713 /* the vdisplay is calculated based on the aspect ratio */
714 if (aspect_ratio == 0) {
715 if (revision < 3)
716 vsize = hsize;
717 else
718 vsize = (hsize * 10) / 16;
719 } else if (aspect_ratio == 1)
720 vsize = (hsize * 3) / 4;
721 else if (aspect_ratio == 2)
722 vsize = (hsize * 4) / 5;
723 else
724 vsize = (hsize * 9) / 16;
725 /* HDTV hack */
726 if (hsize == 1360 && vsize == 765 && vrefresh_rate == 60) {
727 mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0,
728 false);
729 mode->hdisplay = 1366;
730 mode->vsync_start = mode->vsync_start - 1;
731 mode->vsync_end = mode->vsync_end - 1;
732 return mode;
733 }
734 mode = NULL;
735 /* check whether it can be found in default mode table */
736 mode = drm_find_dmt(dev, hsize, vsize, vrefresh_rate);
737 if (mode)
738 return mode;
739
740 switch (timing_level) {
741 case LEVEL_DMT:
742 break;
743 case LEVEL_GTF:
744 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
745 break;
746 case LEVEL_CVT:
747 mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0,
748 false);
749 break;
750 }
751 return mode;
752 }
753
754 /*
755 * EDID is delightfully ambiguous about how interlaced modes are to be
756 * encoded. Our internal representation is of frame height, but some
757 * HDTV detailed timings are encoded as field height.
758 *
759 * The format list here is from CEA, in frame size. Technically we
760 * should be checking refresh rate too. Whatever.
761 */
762 static void
763 drm_mode_do_interlace_quirk(struct drm_display_mode *mode,
764 struct detailed_pixel_timing *pt)
765 {
766 int i;
767 static const struct {
768 int w, h;
769 } cea_interlaced[] = {
770 { 1920, 1080 },
771 { 720, 480 },
772 { 1440, 480 },
773 { 2880, 480 },
774 { 720, 576 },
775 { 1440, 576 },
776 { 2880, 576 },
777 };
778 static const int n_sizes =
779 sizeof(cea_interlaced)/sizeof(cea_interlaced[0]);
780
781 if (!(pt->misc & DRM_EDID_PT_INTERLACED))
782 return;
783
784 for (i = 0; i < n_sizes; i++) {
785 if ((mode->hdisplay == cea_interlaced[i].w) &&
786 (mode->vdisplay == cea_interlaced[i].h / 2)) {
787 mode->vdisplay *= 2;
788 mode->vsync_start *= 2;
789 mode->vsync_end *= 2;
790 mode->vtotal *= 2;
791 mode->vtotal |= 1;
792 }
793 }
794
795 mode->flags |= DRM_MODE_FLAG_INTERLACE;
796 }
797
798 /**
799 * drm_mode_detailed - create a new mode from an EDID detailed timing section
800 * @dev: DRM device (needed to create new mode)
801 * @edid: EDID block
802 * @timing: EDID detailed timing info
803 * @quirks: quirks to apply
804 *
805 * An EDID detailed timing block contains enough info for us to create and
806 * return a new struct drm_display_mode.
807 */
808 static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev,
809 struct edid *edid,
810 struct detailed_timing *timing,
811 u32 quirks)
812 {
813 struct drm_display_mode *mode;
814 struct detailed_pixel_timing *pt = &timing->data.pixel_data;
815 unsigned hactive = (pt->hactive_hblank_hi & 0xf0) << 4 | pt->hactive_lo;
816 unsigned vactive = (pt->vactive_vblank_hi & 0xf0) << 4 | pt->vactive_lo;
817 unsigned hblank = (pt->hactive_hblank_hi & 0xf) << 8 | pt->hblank_lo;
818 unsigned vblank = (pt->vactive_vblank_hi & 0xf) << 8 | pt->vblank_lo;
819 unsigned hsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc0) << 2 | pt->hsync_offset_lo;
820 unsigned hsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x30) << 4 | pt->hsync_pulse_width_lo;
821 unsigned vsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc) >> 2 | pt->vsync_offset_pulse_width_lo >> 4;
822 unsigned vsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x3) << 4 | (pt->vsync_offset_pulse_width_lo & 0xf);
823
824 /* ignore tiny modes */
825 if (hactive < 64 || vactive < 64)
826 return NULL;
827
828 if (pt->misc & DRM_EDID_PT_STEREO) {
829 printk(KERN_WARNING "stereo mode not supported\n");
830 return NULL;
831 }
832 if (!(pt->misc & DRM_EDID_PT_SEPARATE_SYNC)) {
833 printk(KERN_WARNING "composite sync not supported\n");
834 }
835
836 /* it is incorrect if hsync/vsync width is zero */
837 if (!hsync_pulse_width || !vsync_pulse_width) {
838 DRM_DEBUG_KMS("Incorrect Detailed timing. "
839 "Wrong Hsync/Vsync pulse width\n");
840 return NULL;
841 }
842 mode = drm_mode_create(dev);
843 if (!mode)
844 return NULL;
845
846 mode->type = DRM_MODE_TYPE_DRIVER;
847
848 if (quirks & EDID_QUIRK_135_CLOCK_TOO_HIGH)
849 timing->pixel_clock = cpu_to_le16(1088);
850
851 mode->clock = le16_to_cpu(timing->pixel_clock) * 10;
852
853 mode->hdisplay = hactive;
854 mode->hsync_start = mode->hdisplay + hsync_offset;
855 mode->hsync_end = mode->hsync_start + hsync_pulse_width;
856 mode->htotal = mode->hdisplay + hblank;
857
858 mode->vdisplay = vactive;
859 mode->vsync_start = mode->vdisplay + vsync_offset;
860 mode->vsync_end = mode->vsync_start + vsync_pulse_width;
861 mode->vtotal = mode->vdisplay + vblank;
862
863 /* Some EDIDs have bogus h/vtotal values */
864 if (mode->hsync_end > mode->htotal)
865 mode->htotal = mode->hsync_end + 1;
866 if (mode->vsync_end > mode->vtotal)
867 mode->vtotal = mode->vsync_end + 1;
868
869 drm_mode_set_name(mode);
870
871 drm_mode_do_interlace_quirk(mode, pt);
872
873 if (quirks & EDID_QUIRK_DETAILED_SYNC_PP) {
874 pt->misc |= DRM_EDID_PT_HSYNC_POSITIVE | DRM_EDID_PT_VSYNC_POSITIVE;
875 }
876
877 mode->flags |= (pt->misc & DRM_EDID_PT_HSYNC_POSITIVE) ?
878 DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC;
879 mode->flags |= (pt->misc & DRM_EDID_PT_VSYNC_POSITIVE) ?
880 DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC;
881
882 mode->width_mm = pt->width_mm_lo | (pt->width_height_mm_hi & 0xf0) << 4;
883 mode->height_mm = pt->height_mm_lo | (pt->width_height_mm_hi & 0xf) << 8;
884
885 if (quirks & EDID_QUIRK_DETAILED_IN_CM) {
886 mode->width_mm *= 10;
887 mode->height_mm *= 10;
888 }
889
890 if (quirks & EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE) {
891 mode->width_mm = edid->width_cm * 10;
892 mode->height_mm = edid->height_cm * 10;
893 }
894
895 return mode;
896 }
897
898 /*
899 * Detailed mode info for the EDID "established modes" data to use.
900 */
901 static struct drm_display_mode edid_est_modes[] = {
902 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 40000, 800, 840,
903 968, 1056, 0, 600, 601, 605, 628, 0,
904 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@60Hz */
905 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 36000, 800, 824,
906 896, 1024, 0, 600, 601, 603, 625, 0,
907 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@56Hz */
908 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 656,
909 720, 840, 0, 480, 481, 484, 500, 0,
910 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@75Hz */
911 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 664,
912 704, 832, 0, 480, 489, 491, 520, 0,
913 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@72Hz */
914 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 30240, 640, 704,
915 768, 864, 0, 480, 483, 486, 525, 0,
916 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@67Hz */
917 { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 25200, 640, 656,
918 752, 800, 0, 480, 490, 492, 525, 0,
919 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@60Hz */
920 { DRM_MODE("720x400", DRM_MODE_TYPE_DRIVER, 35500, 720, 738,
921 846, 900, 0, 400, 421, 423, 449, 0,
922 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 720x400@88Hz */
923 { DRM_MODE("720x400", DRM_MODE_TYPE_DRIVER, 28320, 720, 738,
924 846, 900, 0, 400, 412, 414, 449, 0,
925 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 720x400@70Hz */
926 { DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 135000, 1280, 1296,
927 1440, 1688, 0, 1024, 1025, 1028, 1066, 0,
928 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 1280x1024@75Hz */
929 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 78800, 1024, 1040,
930 1136, 1312, 0, 768, 769, 772, 800, 0,
931 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 1024x768@75Hz */
932 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 75000, 1024, 1048,
933 1184, 1328, 0, 768, 771, 777, 806, 0,
934 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 1024x768@70Hz */
935 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 65000, 1024, 1048,
936 1184, 1344, 0, 768, 771, 777, 806, 0,
937 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 1024x768@60Hz */
938 { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER,44900, 1024, 1032,
939 1208, 1264, 0, 768, 768, 776, 817, 0,
940 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC | DRM_MODE_FLAG_INTERLACE) }, /* 1024x768@43Hz */
941 { DRM_MODE("832x624", DRM_MODE_TYPE_DRIVER, 57284, 832, 864,
942 928, 1152, 0, 624, 625, 628, 667, 0,
943 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 832x624@75Hz */
944 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 49500, 800, 816,
945 896, 1056, 0, 600, 601, 604, 625, 0,
946 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@75Hz */
947 { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 50000, 800, 856,
948 976, 1040, 0, 600, 637, 643, 666, 0,
949 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@72Hz */
950 { DRM_MODE("1152x864", DRM_MODE_TYPE_DRIVER, 108000, 1152, 1216,
951 1344, 1600, 0, 864, 865, 868, 900, 0,
952 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 1152x864@75Hz */
953 };
954
955 #define EDID_EST_TIMINGS 16
956 #define EDID_STD_TIMINGS 8
957 #define EDID_DETAILED_TIMINGS 4
958
959 /**
960 * add_established_modes - get est. modes from EDID and add them
961 * @edid: EDID block to scan
962 *
963 * Each EDID block contains a bitmap of the supported "established modes" list
964 * (defined above). Tease them out and add them to the global modes list.
965 */
966 static int add_established_modes(struct drm_connector *connector, struct edid *edid)
967 {
968 struct drm_device *dev = connector->dev;
969 unsigned long est_bits = edid->established_timings.t1 |
970 (edid->established_timings.t2 << 8) |
971 ((edid->established_timings.mfg_rsvd & 0x80) << 9);
972 int i, modes = 0;
973
974 for (i = 0; i <= EDID_EST_TIMINGS; i++)
975 if (est_bits & (1<<i)) {
976 struct drm_display_mode *newmode;
977 newmode = drm_mode_duplicate(dev, &edid_est_modes[i]);
978 if (newmode) {
979 drm_mode_probed_add(connector, newmode);
980 modes++;
981 }
982 }
983
984 return modes;
985 }
986 /**
987 * stanard_timing_level - get std. timing level(CVT/GTF/DMT)
988 * @edid: EDID block to scan
989 */
990 static int standard_timing_level(struct edid *edid)
991 {
992 if (edid->revision >= 2) {
993 if (edid->revision >= 4 && (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF))
994 return LEVEL_CVT;
995 return LEVEL_GTF;
996 }
997 return LEVEL_DMT;
998 }
999
1000 /**
1001 * add_standard_modes - get std. modes from EDID and add them
1002 * @edid: EDID block to scan
1003 *
1004 * Standard modes can be calculated using the CVT standard. Grab them from
1005 * @edid, calculate them, and add them to the list.
1006 */
1007 static int add_standard_modes(struct drm_connector *connector, struct edid *edid)
1008 {
1009 struct drm_device *dev = connector->dev;
1010 int i, modes = 0;
1011 int timing_level;
1012
1013 timing_level = standard_timing_level(edid);
1014
1015 for (i = 0; i < EDID_STD_TIMINGS; i++) {
1016 struct std_timing *t = &edid->standard_timings[i];
1017 struct drm_display_mode *newmode;
1018
1019 newmode = drm_mode_std(dev, &edid->standard_timings[i],
1020 edid->revision, timing_level);
1021 if (newmode) {
1022 drm_mode_probed_add(connector, newmode);
1023 modes++;
1024 }
1025 }
1026
1027 return modes;
1028 }
1029
1030 /*
1031 * XXX fix this for:
1032 * - GTF secondary curve formula
1033 * - EDID 1.4 range offsets
1034 * - CVT extended bits
1035 */
1036 static bool
1037 mode_in_range(struct drm_display_mode *mode, struct detailed_timing *timing)
1038 {
1039 struct detailed_data_monitor_range *range;
1040 int hsync, vrefresh;
1041
1042 range = &timing->data.other_data.data.range;
1043
1044 hsync = drm_mode_hsync(mode);
1045 vrefresh = drm_mode_vrefresh(mode);
1046
1047 if (hsync < range->min_hfreq_khz || hsync > range->max_hfreq_khz)
1048 return false;
1049
1050 if (vrefresh < range->min_vfreq || vrefresh > range->max_vfreq)
1051 return false;
1052
1053 if (range->pixel_clock_mhz && range->pixel_clock_mhz != 0xff) {
1054 /* be forgiving since it's in units of 10MHz */
1055 int max_clock = range->pixel_clock_mhz * 10 + 9;
1056 max_clock *= 1000;
1057 if (mode->clock > max_clock)
1058 return false;
1059 }
1060
1061 return true;
1062 }
1063
1064 /*
1065 * XXX If drm_dmt_modes ever regrows the CVT-R modes (and it will) this will
1066 * need to account for them.
1067 */
1068 static int drm_gtf_modes_for_range(struct drm_connector *connector,
1069 struct detailed_timing *timing)
1070 {
1071 int i, modes = 0;
1072 struct drm_display_mode *newmode;
1073 struct drm_device *dev = connector->dev;
1074
1075 for (i = 0; i < drm_num_dmt_modes; i++) {
1076 if (mode_in_range(drm_dmt_modes + i, timing)) {
1077 newmode = drm_mode_duplicate(dev, &drm_dmt_modes[i]);
1078 if (newmode) {
1079 drm_mode_probed_add(connector, newmode);
1080 modes++;
1081 }
1082 }
1083 }
1084
1085 return modes;
1086 }
1087
1088 static int drm_cvt_modes(struct drm_connector *connector,
1089 struct detailed_timing *timing)
1090 {
1091 int i, j, modes = 0;
1092 struct drm_display_mode *newmode;
1093 struct drm_device *dev = connector->dev;
1094 struct cvt_timing *cvt;
1095 const int rates[] = { 60, 85, 75, 60, 50 };
1096 const u8 empty[3] = { 0, 0, 0 };
1097
1098 for (i = 0; i < 4; i++) {
1099 int uninitialized_var(width), height;
1100 cvt = &(timing->data.other_data.data.cvt[i]);
1101
1102 if (!memcmp(cvt->code, empty, 3))
1103 continue;
1104
1105 height = (cvt->code[0] + ((cvt->code[1] & 0xf0) << 4) + 1) * 2;
1106 switch (cvt->code[1] & 0x0c) {
1107 case 0x00:
1108 width = height * 4 / 3;
1109 break;
1110 case 0x04:
1111 width = height * 16 / 9;
1112 break;
1113 case 0x08:
1114 width = height * 16 / 10;
1115 break;
1116 case 0x0c:
1117 width = height * 15 / 9;
1118 break;
1119 }
1120
1121 for (j = 1; j < 5; j++) {
1122 if (cvt->code[2] & (1 << j)) {
1123 newmode = drm_cvt_mode(dev, width, height,
1124 rates[j], j == 0,
1125 false, false);
1126 if (newmode) {
1127 drm_mode_probed_add(connector, newmode);
1128 modes++;
1129 }
1130 }
1131 }
1132 }
1133
1134 return modes;
1135 }
1136
1137 static const struct {
1138 short w;
1139 short h;
1140 short r;
1141 short rb;
1142 } est3_modes[] = {
1143 /* byte 6 */
1144 { 640, 350, 85, 0 },
1145 { 640, 400, 85, 0 },
1146 { 720, 400, 85, 0 },
1147 { 640, 480, 85, 0 },
1148 { 848, 480, 60, 0 },
1149 { 800, 600, 85, 0 },
1150 { 1024, 768, 85, 0 },
1151 { 1152, 864, 75, 0 },
1152 /* byte 7 */
1153 { 1280, 768, 60, 1 },
1154 { 1280, 768, 60, 0 },
1155 { 1280, 768, 75, 0 },
1156 { 1280, 768, 85, 0 },
1157 { 1280, 960, 60, 0 },
1158 { 1280, 960, 85, 0 },
1159 { 1280, 1024, 60, 0 },
1160 { 1280, 1024, 85, 0 },
1161 /* byte 8 */
1162 { 1360, 768, 60, 0 },
1163 { 1440, 900, 60, 1 },
1164 { 1440, 900, 60, 0 },
1165 { 1440, 900, 75, 0 },
1166 { 1440, 900, 85, 0 },
1167 { 1400, 1050, 60, 1 },
1168 { 1400, 1050, 60, 0 },
1169 { 1400, 1050, 75, 0 },
1170 /* byte 9 */
1171 { 1400, 1050, 85, 0 },
1172 { 1680, 1050, 60, 1 },
1173 { 1680, 1050, 60, 0 },
1174 { 1680, 1050, 75, 0 },
1175 { 1680, 1050, 85, 0 },
1176 { 1600, 1200, 60, 0 },
1177 { 1600, 1200, 65, 0 },
1178 { 1600, 1200, 70, 0 },
1179 /* byte 10 */
1180 { 1600, 1200, 75, 0 },
1181 { 1600, 1200, 85, 0 },
1182 { 1792, 1344, 60, 0 },
1183 { 1792, 1344, 85, 0 },
1184 { 1856, 1392, 60, 0 },
1185 { 1856, 1392, 75, 0 },
1186 { 1920, 1200, 60, 1 },
1187 { 1920, 1200, 60, 0 },
1188 /* byte 11 */
1189 { 1920, 1200, 75, 0 },
1190 { 1920, 1200, 85, 0 },
1191 { 1920, 1440, 60, 0 },
1192 { 1920, 1440, 75, 0 },
1193 };
1194 static const int num_est3_modes = sizeof(est3_modes) / sizeof(est3_modes[0]);
1195
1196 static int
1197 drm_est3_modes(struct drm_connector *connector, struct detailed_timing *timing)
1198 {
1199 int i, j, m, modes = 0;
1200 struct drm_display_mode *mode;
1201 u8 *est = ((u8 *)timing) + 5;
1202
1203 for (i = 0; i < 6; i++) {
1204 for (j = 7; j > 0; j--) {
1205 m = (i * 8) + (7 - j);
1206 if (m > num_est3_modes)
1207 break;
1208 if (est[i] & (1 << j)) {
1209 mode = drm_find_dmt(connector->dev,
1210 est3_modes[m].w,
1211 est3_modes[m].h,
1212 est3_modes[m].r
1213 /*, est3_modes[m].rb */);
1214 if (mode) {
1215 drm_mode_probed_add(connector, mode);
1216 modes++;
1217 }
1218 }
1219 }
1220 }
1221
1222 return modes;
1223 }
1224
1225 static int add_detailed_modes(struct drm_connector *connector,
1226 struct detailed_timing *timing,
1227 struct edid *edid, u32 quirks, int preferred)
1228 {
1229 int i, modes = 0;
1230 struct detailed_non_pixel *data = &timing->data.other_data;
1231 int timing_level = standard_timing_level(edid);
1232 int gtf = (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF);
1233 struct drm_display_mode *newmode;
1234 struct drm_device *dev = connector->dev;
1235
1236 if (timing->pixel_clock) {
1237 newmode = drm_mode_detailed(dev, edid, timing, quirks);
1238 if (!newmode)
1239 return 0;
1240
1241 if (preferred)
1242 newmode->type |= DRM_MODE_TYPE_PREFERRED;
1243
1244 drm_mode_probed_add(connector, newmode);
1245 return 1;
1246 }
1247
1248 /* other timing types */
1249 switch (data->type) {
1250 case EDID_DETAIL_MONITOR_RANGE:
1251 if (gtf)
1252 modes += drm_gtf_modes_for_range(connector, timing);
1253 break;
1254 case EDID_DETAIL_STD_MODES:
1255 /* Six modes per detailed section */
1256 for (i = 0; i < 6; i++) {
1257 struct std_timing *std;
1258 struct drm_display_mode *newmode;
1259
1260 std = &data->data.timings[i];
1261 newmode = drm_mode_std(dev, std, edid->revision,
1262 timing_level);
1263 if (newmode) {
1264 drm_mode_probed_add(connector, newmode);
1265 modes++;
1266 }
1267 }
1268 break;
1269 case EDID_DETAIL_CVT_3BYTE:
1270 modes += drm_cvt_modes(connector, timing);
1271 break;
1272 case EDID_DETAIL_EST_TIMINGS:
1273 modes += drm_est3_modes(connector, timing);
1274 break;
1275 default:
1276 break;
1277 }
1278
1279 return modes;
1280 }
1281
1282 /**
1283 * add_detailed_info - get detailed mode info from EDID data
1284 * @connector: attached connector
1285 * @edid: EDID block to scan
1286 * @quirks: quirks to apply
1287 *
1288 * Some of the detailed timing sections may contain mode information. Grab
1289 * it and add it to the list.
1290 */
1291 static int add_detailed_info(struct drm_connector *connector,
1292 struct edid *edid, u32 quirks)
1293 {
1294 int i, modes = 0;
1295
1296 for (i = 0; i < EDID_DETAILED_TIMINGS; i++) {
1297 struct detailed_timing *timing = &edid->detailed_timings[i];
1298 int preferred = (i == 0) && (edid->features & DRM_EDID_FEATURE_PREFERRED_TIMING);
1299
1300 /* In 1.0, only timings are allowed */
1301 if (!timing->pixel_clock && edid->version == 1 &&
1302 edid->revision == 0)
1303 continue;
1304
1305 modes += add_detailed_modes(connector, timing, edid, quirks,
1306 preferred);
1307 }
1308
1309 return modes;
1310 }
1311
1312 /**
1313 * add_detailed_mode_eedid - get detailed mode info from addtional timing
1314 * EDID block
1315 * @connector: attached connector
1316 * @edid: EDID block to scan(It is only to get addtional timing EDID block)
1317 * @quirks: quirks to apply
1318 *
1319 * Some of the detailed timing sections may contain mode information. Grab
1320 * it and add it to the list.
1321 */
1322 static int add_detailed_info_eedid(struct drm_connector *connector,
1323 struct edid *edid, u32 quirks)
1324 {
1325 int i, modes = 0;
1326 char *edid_ext = NULL;
1327 struct detailed_timing *timing;
1328 int edid_ext_num;
1329 int start_offset, end_offset;
1330 int timing_level;
1331
1332 if (edid->version == 1 && edid->revision < 3) {
1333 /* If the EDID version is less than 1.3, there is no
1334 * extension EDID.
1335 */
1336 return 0;
1337 }
1338 if (!edid->extensions) {
1339 /* if there is no extension EDID, it is unnecessary to
1340 * parse the E-EDID to get detailed info
1341 */
1342 return 0;
1343 }
1344
1345 /* Chose real EDID extension number */
1346 edid_ext_num = edid->extensions > DRM_MAX_EDID_EXT_NUM ?
1347 DRM_MAX_EDID_EXT_NUM : edid->extensions;
1348
1349 /* Find CEA extension */
1350 for (i = 0; i < edid_ext_num; i++) {
1351 edid_ext = (char *)edid + EDID_LENGTH * (i + 1);
1352 /* This block is CEA extension */
1353 if (edid_ext[0] == 0x02)
1354 break;
1355 }
1356
1357 if (i == edid_ext_num) {
1358 /* if there is no additional timing EDID block, return */
1359 return 0;
1360 }
1361
1362 /* Get the start offset of detailed timing block */
1363 start_offset = edid_ext[2];
1364 if (start_offset == 0) {
1365 /* If the start_offset is zero, it means that neither detailed
1366 * info nor data block exist. In such case it is also
1367 * unnecessary to parse the detailed timing info.
1368 */
1369 return 0;
1370 }
1371
1372 timing_level = standard_timing_level(edid);
1373 end_offset = EDID_LENGTH;
1374 end_offset -= sizeof(struct detailed_timing);
1375 for (i = start_offset; i < end_offset;
1376 i += sizeof(struct detailed_timing)) {
1377 timing = (struct detailed_timing *)(edid_ext + i);
1378 modes += add_detailed_modes(connector, timing, edid, quirks, 0);
1379 }
1380
1381 return modes;
1382 }
1383
1384 #define HDMI_IDENTIFIER 0x000C03
1385 #define VENDOR_BLOCK 0x03
1386 /**
1387 * drm_detect_hdmi_monitor - detect whether monitor is hdmi.
1388 * @edid: monitor EDID information
1389 *
1390 * Parse the CEA extension according to CEA-861-B.
1391 * Return true if HDMI, false if not or unknown.
1392 */
1393 bool drm_detect_hdmi_monitor(struct edid *edid)
1394 {
1395 char *edid_ext = NULL;
1396 int i, hdmi_id, edid_ext_num;
1397 int start_offset, end_offset;
1398 bool is_hdmi = false;
1399
1400 /* No EDID or EDID extensions */
1401 if (edid == NULL || edid->extensions == 0)
1402 goto end;
1403
1404 /* Chose real EDID extension number */
1405 edid_ext_num = edid->extensions > DRM_MAX_EDID_EXT_NUM ?
1406 DRM_MAX_EDID_EXT_NUM : edid->extensions;
1407
1408 /* Find CEA extension */
1409 for (i = 0; i < edid_ext_num; i++) {
1410 edid_ext = (char *)edid + EDID_LENGTH * (i + 1);
1411 /* This block is CEA extension */
1412 if (edid_ext[0] == 0x02)
1413 break;
1414 }
1415
1416 if (i == edid_ext_num)
1417 goto end;
1418
1419 /* Data block offset in CEA extension block */
1420 start_offset = 4;
1421 end_offset = edid_ext[2];
1422
1423 /*
1424 * Because HDMI identifier is in Vendor Specific Block,
1425 * search it from all data blocks of CEA extension.
1426 */
1427 for (i = start_offset; i < end_offset;
1428 /* Increased by data block len */
1429 i += ((edid_ext[i] & 0x1f) + 1)) {
1430 /* Find vendor specific block */
1431 if ((edid_ext[i] >> 5) == VENDOR_BLOCK) {
1432 hdmi_id = edid_ext[i + 1] | (edid_ext[i + 2] << 8) |
1433 edid_ext[i + 3] << 16;
1434 /* Find HDMI identifier */
1435 if (hdmi_id == HDMI_IDENTIFIER)
1436 is_hdmi = true;
1437 break;
1438 }
1439 }
1440
1441 end:
1442 return is_hdmi;
1443 }
1444 EXPORT_SYMBOL(drm_detect_hdmi_monitor);
1445
1446 /**
1447 * drm_add_edid_modes - add modes from EDID data, if available
1448 * @connector: connector we're probing
1449 * @edid: edid data
1450 *
1451 * Add the specified modes to the connector's mode list.
1452 *
1453 * Return number of modes added or 0 if we couldn't find any.
1454 */
1455 int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid)
1456 {
1457 int num_modes = 0;
1458 u32 quirks;
1459
1460 if (edid == NULL) {
1461 return 0;
1462 }
1463 if (!drm_edid_is_valid(edid)) {
1464 dev_warn(&connector->dev->pdev->dev, "%s: EDID invalid.\n",
1465 drm_get_connector_name(connector));
1466 return 0;
1467 }
1468
1469 quirks = edid_get_quirks(edid);
1470
1471 /*
1472 * EDID spec says modes should be preferred in this order:
1473 * - preferred detailed mode
1474 * - other detailed modes from base block
1475 * - detailed modes from extension blocks
1476 * - CVT 3-byte code modes
1477 * - standard timing codes
1478 * - established timing codes
1479 * - modes inferred from GTF or CVT range information
1480 *
1481 * We don't quite implement this yet, but we're close.
1482 *
1483 * XXX order for additional mode types in extension blocks?
1484 */
1485 num_modes += add_detailed_info(connector, edid, quirks);
1486 num_modes += add_detailed_info_eedid(connector, edid, quirks);
1487 num_modes += add_standard_modes(connector, edid);
1488 num_modes += add_established_modes(connector, edid);
1489
1490 if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75))
1491 edid_fixup_preferred(connector, quirks);
1492
1493 connector->display_info.serration_vsync = (edid->input & DRM_EDID_INPUT_SERRATION_VSYNC) ? 1 : 0;
1494 connector->display_info.sync_on_green = (edid->input & DRM_EDID_INPUT_SYNC_ON_GREEN) ? 1 : 0;
1495 connector->display_info.composite_sync = (edid->input & DRM_EDID_INPUT_COMPOSITE_SYNC) ? 1 : 0;
1496 connector->display_info.separate_syncs = (edid->input & DRM_EDID_INPUT_SEPARATE_SYNCS) ? 1 : 0;
1497 connector->display_info.blank_to_black = (edid->input & DRM_EDID_INPUT_BLANK_TO_BLACK) ? 1 : 0;
1498 connector->display_info.video_level = (edid->input & DRM_EDID_INPUT_VIDEO_LEVEL) >> 5;
1499 connector->display_info.digital = (edid->input & DRM_EDID_INPUT_DIGITAL) ? 1 : 0;
1500 connector->display_info.width_mm = edid->width_cm * 10;
1501 connector->display_info.height_mm = edid->height_cm * 10;
1502 connector->display_info.gamma = edid->gamma;
1503 connector->display_info.gtf_supported = (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF) ? 1 : 0;
1504 connector->display_info.standard_color = (edid->features & DRM_EDID_FEATURE_STANDARD_COLOR) ? 1 : 0;
1505 connector->display_info.display_type = (edid->features & DRM_EDID_FEATURE_DISPLAY_TYPE) >> 3;
1506 connector->display_info.active_off_supported = (edid->features & DRM_EDID_FEATURE_PM_ACTIVE_OFF) ? 1 : 0;
1507 connector->display_info.suspend_supported = (edid->features & DRM_EDID_FEATURE_PM_SUSPEND) ? 1 : 0;
1508 connector->display_info.standby_supported = (edid->features & DRM_EDID_FEATURE_PM_STANDBY) ? 1 : 0;
1509 connector->display_info.gamma = edid->gamma;
1510
1511 return num_modes;
1512 }
1513 EXPORT_SYMBOL(drm_add_edid_modes);
1514
1515 /**
1516 * drm_add_modes_noedid - add modes for the connectors without EDID
1517 * @connector: connector we're probing
1518 * @hdisplay: the horizontal display limit
1519 * @vdisplay: the vertical display limit
1520 *
1521 * Add the specified modes to the connector's mode list. Only when the
1522 * hdisplay/vdisplay is not beyond the given limit, it will be added.
1523 *
1524 * Return number of modes added or 0 if we couldn't find any.
1525 */
1526 int drm_add_modes_noedid(struct drm_connector *connector,
1527 int hdisplay, int vdisplay)
1528 {
1529 int i, count, num_modes = 0;
1530 struct drm_display_mode *mode, *ptr;
1531 struct drm_device *dev = connector->dev;
1532
1533 count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
1534 if (hdisplay < 0)
1535 hdisplay = 0;
1536 if (vdisplay < 0)
1537 vdisplay = 0;
1538
1539 for (i = 0; i < count; i++) {
1540 ptr = &drm_dmt_modes[i];
1541 if (hdisplay && vdisplay) {
1542 /*
1543 * Only when two are valid, they will be used to check
1544 * whether the mode should be added to the mode list of
1545 * the connector.
1546 */
1547 if (ptr->hdisplay > hdisplay ||
1548 ptr->vdisplay > vdisplay)
1549 continue;
1550 }
1551 if (drm_mode_vrefresh(ptr) > 61)
1552 continue;
1553 mode = drm_mode_duplicate(dev, ptr);
1554 if (mode) {
1555 drm_mode_probed_add(connector, mode);
1556 num_modes++;
1557 }
1558 }
1559 return num_modes;
1560 }
1561 EXPORT_SYMBOL(drm_add_modes_noedid);
Linux kernel - Deliverables
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