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[PATCH] uml build fix
[linux-2.6/linux-2.6-openrd.git] / drivers / video / fbmon.c
blob3ccfff715a5147c18b266b512c9bfbd4342efe96
1 /*
2 * linux/drivers/video/fbmon.c
3 *
4 * Copyright (C) 2002 James Simmons <jsimmons@users.sf.net>
5 *
6 * Credits:
7 *
8 * The EDID Parser is a conglomeration from the following sources:
9 *
10 * 1. SciTech SNAP Graphics Architecture
11 * Copyright (C) 1991-2002 SciTech Software, Inc. All rights reserved.
12 *
13 * 2. XFree86 4.3.0, interpret_edid.c
14 * Copyright 1998 by Egbert Eich <Egbert.Eich@Physik.TU-Darmstadt.DE>
15 *
16 * 3. John Fremlin <vii@users.sourceforge.net> and
17 * Ani Joshi <ajoshi@unixbox.com>
18 *
19 * Generalized Timing Formula is derived from:
20 *
21 * GTF Spreadsheet by Andy Morrish (1/5/97)
22 * available at http://www.vesa.org
23 *
24 * This file is subject to the terms and conditions of the GNU General Public
25 * License. See the file COPYING in the main directory of this archive
26 * for more details.
27 *
28 */
29 #include <linux/tty.h>
30 #include <linux/fb.h>
31 #include <linux/module.h>
32 #include <linux/pci.h>
33 #include <video/edid.h>
34 #ifdef CONFIG_PPC_OF
35 #include <asm/prom.h>
36 #include <asm/pci-bridge.h>
37 #endif
38 #include "edid.h"
39
40 /*
41 * EDID parser
42 */
43
44 #undef DEBUG /* define this for verbose EDID parsing output */
45
46 #ifdef DEBUG
47 #define DPRINTK(fmt, args...) printk(fmt,## args)
48 #else
49 #define DPRINTK(fmt, args...)
50 #endif
51
52 #define FBMON_FIX_HEADER 1
53 #define FBMON_FIX_INPUT 2
54
55 #ifdef CONFIG_FB_MODE_HELPERS
56 struct broken_edid {
57 u8 manufacturer[4];
58 u32 model;
59 u32 fix;
60 };
61
62 static struct broken_edid brokendb[] = {
63 /* DEC FR-PCXAV-YZ */
64 {
65 .manufacturer = "DEC",
66 .model = 0x073a,
67 .fix = FBMON_FIX_HEADER,
68 },
69 /* ViewSonic PF775a */
70 {
71 .manufacturer = "VSC",
72 .model = 0x5a44,
73 .fix = FBMON_FIX_INPUT,
74 },
75 };
76
77 static const unsigned char edid_v1_header[] = { 0x00, 0xff, 0xff, 0xff,
78 0xff, 0xff, 0xff, 0x00
79 };
80
81 static void copy_string(unsigned char *c, unsigned char *s)
82 {
83 int i;
84 c = c + 5;
85 for (i = 0; (i < 13 && *c != 0x0A); i++)
86 *(s++) = *(c++);
87 *s = 0;
88 while (i-- && (*--s == 0x20)) *s = 0;
89 }
90
91 static int check_edid(unsigned char *edid)
92 {
93 unsigned char *block = edid + ID_MANUFACTURER_NAME, manufacturer[4];
94 unsigned char *b;
95 u32 model;
96 int i, fix = 0, ret = 0;
97
98 manufacturer[0] = ((block[0] & 0x7c) >> 2) + '@';
99 manufacturer[1] = ((block[0] & 0x03) << 3) +
100 ((block[1] & 0xe0) >> 5) + '@';
101 manufacturer[2] = (block[1] & 0x1f) + '@';
102 manufacturer[3] = 0;
103 model = block[2] + (block[3] << 8);
104
105 for (i = 0; i < ARRAY_SIZE(brokendb); i++) {
106 if (!strncmp(manufacturer, brokendb[i].manufacturer, 4) &&
107 brokendb[i].model == model) {
108 printk("fbmon: The EDID Block of "
109 "Manufacturer: %s Model: 0x%x is known to "
110 "be broken,\n", manufacturer, model);
111 fix = brokendb[i].fix;
112 break;
113 }
114 }
115
116 switch (fix) {
117 case FBMON_FIX_HEADER:
118 for (i = 0; i < 8; i++) {
119 if (edid[i] != edid_v1_header[i])
120 ret = fix;
121 }
122 break;
123 case FBMON_FIX_INPUT:
124 b = edid + EDID_STRUCT_DISPLAY;
125 /* Only if display is GTF capable will
126 the input type be reset to analog */
127 if (b[4] & 0x01 && b[0] & 0x80)
128 ret = fix;
129 break;
130 }
131
132 return ret;
133 }
134
135 static void fix_edid(unsigned char *edid, int fix)
136 {
137 unsigned char *b;
138
139 switch (fix) {
140 case FBMON_FIX_HEADER:
141 printk("fbmon: trying a header reconstruct\n");
142 memcpy(edid, edid_v1_header, 8);
143 break;
144 case FBMON_FIX_INPUT:
145 printk("fbmon: trying to fix input type\n");
146 b = edid + EDID_STRUCT_DISPLAY;
147 b[0] &= ~0x80;
148 edid[127] += 0x80;
149 }
150 }
151
152 static int edid_checksum(unsigned char *edid)
153 {
154 unsigned char i, csum = 0, all_null = 0;
155 int err = 0, fix = check_edid(edid);
156
157 if (fix)
158 fix_edid(edid, fix);
159
160 for (i = 0; i < EDID_LENGTH; i++) {
161 csum += edid[i];
162 all_null |= edid[i];
163 }
164
165 if (csum == 0x00 && all_null) {
166 /* checksum passed, everything's good */
167 err = 1;
168 }
169
170 return err;
171 }
172
173 static int edid_check_header(unsigned char *edid)
174 {
175 int i, err = 1, fix = check_edid(edid);
176
177 if (fix)
178 fix_edid(edid, fix);
179
180 for (i = 0; i < 8; i++) {
181 if (edid[i] != edid_v1_header[i])
182 err = 0;
183 }
184
185 return err;
186 }
187
188 static void parse_vendor_block(unsigned char *block, struct fb_monspecs *specs)
189 {
190 specs->manufacturer[0] = ((block[0] & 0x7c) >> 2) + '@';
191 specs->manufacturer[1] = ((block[0] & 0x03) << 3) +
192 ((block[1] & 0xe0) >> 5) + '@';
193 specs->manufacturer[2] = (block[1] & 0x1f) + '@';
194 specs->manufacturer[3] = 0;
195 specs->model = block[2] + (block[3] << 8);
196 specs->serial = block[4] + (block[5] << 8) +
197 (block[6] << 16) + (block[7] << 24);
198 specs->year = block[9] + 1990;
199 specs->week = block[8];
200 DPRINTK(" Manufacturer: %s\n", specs->manufacturer);
201 DPRINTK(" Model: %x\n", specs->model);
202 DPRINTK(" Serial#: %u\n", specs->serial);
203 DPRINTK(" Year: %u Week %u\n", specs->year, specs->week);
204 }
205
206 static void get_dpms_capabilities(unsigned char flags,
207 struct fb_monspecs *specs)
208 {
209 specs->dpms = 0;
210 if (flags & DPMS_ACTIVE_OFF)
211 specs->dpms |= FB_DPMS_ACTIVE_OFF;
212 if (flags & DPMS_SUSPEND)
213 specs->dpms |= FB_DPMS_SUSPEND;
214 if (flags & DPMS_STANDBY)
215 specs->dpms |= FB_DPMS_STANDBY;
216 DPRINTK(" DPMS: Active %s, Suspend %s, Standby %s\n",
217 (flags & DPMS_ACTIVE_OFF) ? "yes" : "no",
218 (flags & DPMS_SUSPEND) ? "yes" : "no",
219 (flags & DPMS_STANDBY) ? "yes" : "no");
220 }
221
222 static void get_chroma(unsigned char *block, struct fb_monspecs *specs)
223 {
224 int tmp;
225
226 DPRINTK(" Chroma\n");
227 /* Chromaticity data */
228 tmp = ((block[5] & (3 << 6)) >> 6) | (block[0x7] << 2);
229 tmp *= 1000;
230 tmp += 512;
231 specs->chroma.redx = tmp/1024;
232 DPRINTK(" RedX: 0.%03d ", specs->chroma.redx);
233
234 tmp = ((block[5] & (3 << 4)) >> 4) | (block[0x8] << 2);
235 tmp *= 1000;
236 tmp += 512;
237 specs->chroma.redy = tmp/1024;
238 DPRINTK("RedY: 0.%03d\n", specs->chroma.redy);
239
240 tmp = ((block[5] & (3 << 2)) >> 2) | (block[0x9] << 2);
241 tmp *= 1000;
242 tmp += 512;
243 specs->chroma.greenx = tmp/1024;
244 DPRINTK(" GreenX: 0.%03d ", specs->chroma.greenx);
245
246 tmp = (block[5] & 3) | (block[0xa] << 2);
247 tmp *= 1000;
248 tmp += 512;
249 specs->chroma.greeny = tmp/1024;
250 DPRINTK("GreenY: 0.%03d\n", specs->chroma.greeny);
251
252 tmp = ((block[6] & (3 << 6)) >> 6) | (block[0xb] << 2);
253 tmp *= 1000;
254 tmp += 512;
255 specs->chroma.bluex = tmp/1024;
256 DPRINTK(" BlueX: 0.%03d ", specs->chroma.bluex);
257
258 tmp = ((block[6] & (3 << 4)) >> 4) | (block[0xc] << 2);
259 tmp *= 1000;
260 tmp += 512;
261 specs->chroma.bluey = tmp/1024;
262 DPRINTK("BlueY: 0.%03d\n", specs->chroma.bluey);
263
264 tmp = ((block[6] & (3 << 2)) >> 2) | (block[0xd] << 2);
265 tmp *= 1000;
266 tmp += 512;
267 specs->chroma.whitex = tmp/1024;
268 DPRINTK(" WhiteX: 0.%03d ", specs->chroma.whitex);
269
270 tmp = (block[6] & 3) | (block[0xe] << 2);
271 tmp *= 1000;
272 tmp += 512;
273 specs->chroma.whitey = tmp/1024;
274 DPRINTK("WhiteY: 0.%03d\n", specs->chroma.whitey);
275 }
276
277 static int edid_is_serial_block(unsigned char *block)
278 {
279 if ((block[0] == 0x00) && (block[1] == 0x00) &&
280 (block[2] == 0x00) && (block[3] == 0xff) &&
281 (block[4] == 0x00))
282 return 1;
283 else
284 return 0;
285 }
286
287 static int edid_is_ascii_block(unsigned char *block)
288 {
289 if ((block[0] == 0x00) && (block[1] == 0x00) &&
290 (block[2] == 0x00) && (block[3] == 0xfe) &&
291 (block[4] == 0x00))
292 return 1;
293 else
294 return 0;
295 }
296
297 static int edid_is_limits_block(unsigned char *block)
298 {
299 if ((block[0] == 0x00) && (block[1] == 0x00) &&
300 (block[2] == 0x00) && (block[3] == 0xfd) &&
301 (block[4] == 0x00))
302 return 1;
303 else
304 return 0;
305 }
306
307 static int edid_is_monitor_block(unsigned char *block)
308 {
309 if ((block[0] == 0x00) && (block[1] == 0x00) &&
310 (block[2] == 0x00) && (block[3] == 0xfc) &&
311 (block[4] == 0x00))
312 return 1;
313 else
314 return 0;
315 }
316
317 static void calc_mode_timings(int xres, int yres, int refresh,
318 struct fb_videomode *mode)
319 {
320 struct fb_var_screeninfo *var;
321
322 var = kzalloc(sizeof(struct fb_var_screeninfo), GFP_KERNEL);
323
324 if (var) {
325 var->xres = xres;
326 var->yres = yres;
327 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON,
328 refresh, var, NULL);
329 mode->xres = xres;
330 mode->yres = yres;
331 mode->pixclock = var->pixclock;
332 mode->refresh = refresh;
333 mode->left_margin = var->left_margin;
334 mode->right_margin = var->right_margin;
335 mode->upper_margin = var->upper_margin;
336 mode->lower_margin = var->lower_margin;
337 mode->hsync_len = var->hsync_len;
338 mode->vsync_len = var->vsync_len;
339 mode->vmode = 0;
340 mode->sync = 0;
341 kfree(var);
342 }
343 }
344
345 static int get_est_timing(unsigned char *block, struct fb_videomode *mode)
346 {
347 int num = 0;
348 unsigned char c;
349
350 c = block[0];
351 if (c&0x80) {
352 calc_mode_timings(720, 400, 70, &mode[num]);
353 mode[num++].flag = FB_MODE_IS_CALCULATED;
354 DPRINTK(" 720x400@70Hz\n");
355 }
356 if (c&0x40) {
357 calc_mode_timings(720, 400, 88, &mode[num]);
358 mode[num++].flag = FB_MODE_IS_CALCULATED;
359 DPRINTK(" 720x400@88Hz\n");
360 }
361 if (c&0x20) {
362 mode[num++] = vesa_modes[3];
363 DPRINTK(" 640x480@60Hz\n");
364 }
365 if (c&0x10) {
366 calc_mode_timings(640, 480, 67, &mode[num]);
367 mode[num++].flag = FB_MODE_IS_CALCULATED;
368 DPRINTK(" 640x480@67Hz\n");
369 }
370 if (c&0x08) {
371 mode[num++] = vesa_modes[4];
372 DPRINTK(" 640x480@72Hz\n");
373 }
374 if (c&0x04) {
375 mode[num++] = vesa_modes[5];
376 DPRINTK(" 640x480@75Hz\n");
377 }
378 if (c&0x02) {
379 mode[num++] = vesa_modes[7];
380 DPRINTK(" 800x600@56Hz\n");
381 }
382 if (c&0x01) {
383 mode[num++] = vesa_modes[8];
384 DPRINTK(" 800x600@60Hz\n");
385 }
386
387 c = block[1];
388 if (c&0x80) {
389 mode[num++] = vesa_modes[9];
390 DPRINTK(" 800x600@72Hz\n");
391 }
392 if (c&0x40) {
393 mode[num++] = vesa_modes[10];
394 DPRINTK(" 800x600@75Hz\n");
395 }
396 if (c&0x20) {
397 calc_mode_timings(832, 624, 75, &mode[num]);
398 mode[num++].flag = FB_MODE_IS_CALCULATED;
399 DPRINTK(" 832x624@75Hz\n");
400 }
401 if (c&0x10) {
402 mode[num++] = vesa_modes[12];
403 DPRINTK(" 1024x768@87Hz Interlaced\n");
404 }
405 if (c&0x08) {
406 mode[num++] = vesa_modes[13];
407 DPRINTK(" 1024x768@60Hz\n");
408 }
409 if (c&0x04) {
410 mode[num++] = vesa_modes[14];
411 DPRINTK(" 1024x768@70Hz\n");
412 }
413 if (c&0x02) {
414 mode[num++] = vesa_modes[15];
415 DPRINTK(" 1024x768@75Hz\n");
416 }
417 if (c&0x01) {
418 mode[num++] = vesa_modes[21];
419 DPRINTK(" 1280x1024@75Hz\n");
420 }
421 c = block[2];
422 if (c&0x80) {
423 mode[num++] = vesa_modes[17];
424 DPRINTK(" 1152x870@75Hz\n");
425 }
426 DPRINTK(" Manufacturer's mask: %x\n",c&0x7F);
427 return num;
428 }
429
430 static int get_std_timing(unsigned char *block, struct fb_videomode *mode)
431 {
432 int xres, yres = 0, refresh, ratio, i;
433
434 xres = (block[0] + 31) * 8;
435 if (xres <= 256)
436 return 0;
437
438 ratio = (block[1] & 0xc0) >> 6;
439 switch (ratio) {
440 case 0:
441 yres = xres;
442 break;
443 case 1:
444 yres = (xres * 3)/4;
445 break;
446 case 2:
447 yres = (xres * 4)/5;
448 break;
449 case 3:
450 yres = (xres * 9)/16;
451 break;
452 }
453 refresh = (block[1] & 0x3f) + 60;
454
455 DPRINTK(" %dx%d@%dHz\n", xres, yres, refresh);
456 for (i = 0; i < VESA_MODEDB_SIZE; i++) {
457 if (vesa_modes[i].xres == xres &&
458 vesa_modes[i].yres == yres &&
459 vesa_modes[i].refresh == refresh) {
460 *mode = vesa_modes[i];
461 mode->flag |= FB_MODE_IS_STANDARD;
462 return 1;
463 }
464 }
465 calc_mode_timings(xres, yres, refresh, mode);
466 return 1;
467 }
468
469 static int get_dst_timing(unsigned char *block,
470 struct fb_videomode *mode)
471 {
472 int j, num = 0;
473
474 for (j = 0; j < 6; j++, block+= STD_TIMING_DESCRIPTION_SIZE)
475 num += get_std_timing(block, &mode[num]);
476
477 return num;
478 }
479
480 static void get_detailed_timing(unsigned char *block,
481 struct fb_videomode *mode)
482 {
483 mode->xres = H_ACTIVE;
484 mode->yres = V_ACTIVE;
485 mode->pixclock = PIXEL_CLOCK;
486 mode->pixclock /= 1000;
487 mode->pixclock = KHZ2PICOS(mode->pixclock);
488 mode->right_margin = H_SYNC_OFFSET;
489 mode->left_margin = (H_ACTIVE + H_BLANKING) -
490 (H_ACTIVE + H_SYNC_OFFSET + H_SYNC_WIDTH);
491 mode->upper_margin = V_BLANKING - V_SYNC_OFFSET -
492 V_SYNC_WIDTH;
493 mode->lower_margin = V_SYNC_OFFSET;
494 mode->hsync_len = H_SYNC_WIDTH;
495 mode->vsync_len = V_SYNC_WIDTH;
496 if (HSYNC_POSITIVE)
497 mode->sync |= FB_SYNC_HOR_HIGH_ACT;
498 if (VSYNC_POSITIVE)
499 mode->sync |= FB_SYNC_VERT_HIGH_ACT;
500 mode->refresh = PIXEL_CLOCK/((H_ACTIVE + H_BLANKING) *
501 (V_ACTIVE + V_BLANKING));
502 mode->vmode = 0;
503 mode->flag = FB_MODE_IS_DETAILED;
504
505 DPRINTK(" %d MHz ", PIXEL_CLOCK/1000000);
506 DPRINTK("%d %d %d %d ", H_ACTIVE, H_ACTIVE + H_SYNC_OFFSET,
507 H_ACTIVE + H_SYNC_OFFSET + H_SYNC_WIDTH, H_ACTIVE + H_BLANKING);
508 DPRINTK("%d %d %d %d ", V_ACTIVE, V_ACTIVE + V_SYNC_OFFSET,
509 V_ACTIVE + V_SYNC_OFFSET + V_SYNC_WIDTH, V_ACTIVE + V_BLANKING);
510 DPRINTK("%sHSync %sVSync\n\n", (HSYNC_POSITIVE) ? "+" : "-",
511 (VSYNC_POSITIVE) ? "+" : "-");
512 }
513
514 /**
515 * fb_create_modedb - create video mode database
516 * @edid: EDID data
517 * @dbsize: database size
518 *
519 * RETURNS: struct fb_videomode, @dbsize contains length of database
520 *
521 * DESCRIPTION:
522 * This function builds a mode database using the contents of the EDID
523 * data
524 */
525 static struct fb_videomode *fb_create_modedb(unsigned char *edid, int *dbsize)
526 {
527 struct fb_videomode *mode, *m;
528 unsigned char *block;
529 int num = 0, i;
530
531 mode = kzalloc(50 * sizeof(struct fb_videomode), GFP_KERNEL);
532 if (mode == NULL)
533 return NULL;
534
535 if (edid == NULL || !edid_checksum(edid) ||
536 !edid_check_header(edid)) {
537 kfree(mode);
538 return NULL;
539 }
540
541 *dbsize = 0;
542
543 DPRINTK(" Detailed Timings\n");
544 block = edid + DETAILED_TIMING_DESCRIPTIONS_START;
545 for (i = 0; i < 4; i++, block+= DETAILED_TIMING_DESCRIPTION_SIZE) {
546 int first = 1;
547
548 if (!(block[0] == 0x00 && block[1] == 0x00)) {
549 get_detailed_timing(block, &mode[num]);
550 if (first) {
551 mode[num].flag |= FB_MODE_IS_FIRST;
552 first = 0;
553 }
554 num++;
555 }
556 }
557
558 DPRINTK(" Supported VESA Modes\n");
559 block = edid + ESTABLISHED_TIMING_1;
560 num += get_est_timing(block, &mode[num]);
561
562 DPRINTK(" Standard Timings\n");
563 block = edid + STD_TIMING_DESCRIPTIONS_START;
564 for (i = 0; i < STD_TIMING; i++, block += STD_TIMING_DESCRIPTION_SIZE)
565 num += get_std_timing(block, &mode[num]);
566
567 block = edid + DETAILED_TIMING_DESCRIPTIONS_START;
568 for (i = 0; i < 4; i++, block+= DETAILED_TIMING_DESCRIPTION_SIZE) {
569 if (block[0] == 0x00 && block[1] == 0x00 && block[3] == 0xfa)
570 num += get_dst_timing(block + 5, &mode[num]);
571 }
572
573 /* Yikes, EDID data is totally useless */
574 if (!num) {
575 kfree(mode);
576 return NULL;
577 }
578
579 *dbsize = num;
580 m = kmalloc(num * sizeof(struct fb_videomode), GFP_KERNEL);
581 if (!m)
582 return mode;
583 memmove(m, mode, num * sizeof(struct fb_videomode));
584 kfree(mode);
585 return m;
586 }
587
588 /**
589 * fb_destroy_modedb - destroys mode database
590 * @modedb: mode database to destroy
591 *
592 * DESCRIPTION:
593 * Destroy mode database created by fb_create_modedb
594 */
595 void fb_destroy_modedb(struct fb_videomode *modedb)
596 {
597 kfree(modedb);
598 }
599
600 static int fb_get_monitor_limits(unsigned char *edid, struct fb_monspecs *specs)
601 {
602 int i, retval = 1;
603 unsigned char *block;
604
605 block = edid + DETAILED_TIMING_DESCRIPTIONS_START;
606
607 DPRINTK(" Monitor Operating Limits: ");
608
609 for (i = 0; i < 4; i++, block += DETAILED_TIMING_DESCRIPTION_SIZE) {
610 if (edid_is_limits_block(block)) {
611 specs->hfmin = H_MIN_RATE * 1000;
612 specs->hfmax = H_MAX_RATE * 1000;
613 specs->vfmin = V_MIN_RATE;
614 specs->vfmax = V_MAX_RATE;
615 specs->dclkmax = MAX_PIXEL_CLOCK * 1000000;
616 specs->gtf = (GTF_SUPPORT) ? 1 : 0;
617 retval = 0;
618 DPRINTK("From EDID\n");
619 break;
620 }
621 }
622
623 /* estimate monitor limits based on modes supported */
624 if (retval) {
625 struct fb_videomode *modes, *mode;
626 int num_modes, i, hz, hscan, pixclock;
627 int vtotal, htotal;
628
629 modes = fb_create_modedb(edid, &num_modes);
630 if (!modes) {
631 DPRINTK("None Available\n");
632 return 1;
633 }
634
635 retval = 0;
636 for (i = 0; i < num_modes; i++) {
637 mode = &modes[i];
638 pixclock = PICOS2KHZ(modes[i].pixclock) * 1000;
639 htotal = mode->xres + mode->right_margin + mode->hsync_len
640 + mode->left_margin;
641 vtotal = mode->yres + mode->lower_margin + mode->vsync_len
642 + mode->upper_margin;
643
644 if (mode->vmode & FB_VMODE_INTERLACED)
645 vtotal /= 2;
646
647 if (mode->vmode & FB_VMODE_DOUBLE)
648 vtotal *= 2;
649
650 hscan = (pixclock + htotal / 2) / htotal;
651 hscan = (hscan + 500) / 1000 * 1000;
652 hz = (hscan + vtotal / 2) / vtotal;
653
654 if (specs->dclkmax == 0 || specs->dclkmax < pixclock)
655 specs->dclkmax = pixclock;
656
657 if (specs->dclkmin == 0 || specs->dclkmin > pixclock)
658 specs->dclkmin = pixclock;
659
660 if (specs->hfmax == 0 || specs->hfmax < hscan)
661 specs->hfmax = hscan;
662
663 if (specs->hfmin == 0 || specs->hfmin > hscan)
664 specs->hfmin = hscan;
665
666 if (specs->vfmax == 0 || specs->vfmax < hz)
667 specs->vfmax = hz;
668
669 if (specs->vfmin == 0 || specs->vfmin > hz)
670 specs->vfmin = hz;
671 }
672 DPRINTK("Extrapolated\n");
673 fb_destroy_modedb(modes);
674 }
675 DPRINTK(" H: %d-%dKHz V: %d-%dHz DCLK: %dMHz\n",
676 specs->hfmin/1000, specs->hfmax/1000, specs->vfmin,
677 specs->vfmax, specs->dclkmax/1000000);
678 return retval;
679 }
680
681 static void get_monspecs(unsigned char *edid, struct fb_monspecs *specs)
682 {
683 unsigned char c, *block;
684
685 block = edid + EDID_STRUCT_DISPLAY;
686
687 fb_get_monitor_limits(edid, specs);
688
689 c = block[0] & 0x80;
690 specs->input = 0;
691 if (c) {
692 specs->input |= FB_DISP_DDI;
693 DPRINTK(" Digital Display Input");
694 } else {
695 DPRINTK(" Analog Display Input: Input Voltage - ");
696 switch ((block[0] & 0x60) >> 5) {
697 case 0:
698 DPRINTK("0.700V/0.300V");
699 specs->input |= FB_DISP_ANA_700_300;
700 break;
701 case 1:
702 DPRINTK("0.714V/0.286V");
703 specs->input |= FB_DISP_ANA_714_286;
704 break;
705 case 2:
706 DPRINTK("1.000V/0.400V");
707 specs->input |= FB_DISP_ANA_1000_400;
708 break;
709 case 3:
710 DPRINTK("0.700V/0.000V");
711 specs->input |= FB_DISP_ANA_700_000;
712 break;
713 }
714 }
715 DPRINTK("\n Sync: ");
716 c = block[0] & 0x10;
717 if (c)
718 DPRINTK(" Configurable signal level\n");
719 c = block[0] & 0x0f;
720 specs->signal = 0;
721 if (c & 0x10) {
722 DPRINTK("Blank to Blank ");
723 specs->signal |= FB_SIGNAL_BLANK_BLANK;
724 }
725 if (c & 0x08) {
726 DPRINTK("Separate ");
727 specs->signal |= FB_SIGNAL_SEPARATE;
728 }
729 if (c & 0x04) {
730 DPRINTK("Composite ");
731 specs->signal |= FB_SIGNAL_COMPOSITE;
732 }
733 if (c & 0x02) {
734 DPRINTK("Sync on Green ");
735 specs->signal |= FB_SIGNAL_SYNC_ON_GREEN;
736 }
737 if (c & 0x01) {
738 DPRINTK("Serration on ");
739 specs->signal |= FB_SIGNAL_SERRATION_ON;
740 }
741 DPRINTK("\n");
742 specs->max_x = block[1];
743 specs->max_y = block[2];
744 DPRINTK(" Max H-size in cm: ");
745 if (specs->max_x)
746 DPRINTK("%d\n", specs->max_x);
747 else
748 DPRINTK("variable\n");
749 DPRINTK(" Max V-size in cm: ");
750 if (specs->max_y)
751 DPRINTK("%d\n", specs->max_y);
752 else
753 DPRINTK("variable\n");
754
755 c = block[3];
756 specs->gamma = c+100;
757 DPRINTK(" Gamma: ");
758 DPRINTK("%d.%d\n", specs->gamma/100, specs->gamma % 100);
759
760 get_dpms_capabilities(block[4], specs);
761
762 switch ((block[4] & 0x18) >> 3) {
763 case 0:
764 DPRINTK(" Monochrome/Grayscale\n");
765 specs->input |= FB_DISP_MONO;
766 break;
767 case 1:
768 DPRINTK(" RGB Color Display\n");
769 specs->input |= FB_DISP_RGB;
770 break;
771 case 2:
772 DPRINTK(" Non-RGB Multicolor Display\n");
773 specs->input |= FB_DISP_MULTI;
774 break;
775 default:
776 DPRINTK(" Unknown\n");
777 specs->input |= FB_DISP_UNKNOWN;
778 break;
779 }
780
781 get_chroma(block, specs);
782
783 specs->misc = 0;
784 c = block[4] & 0x7;
785 if (c & 0x04) {
786 DPRINTK(" Default color format is primary\n");
787 specs->misc |= FB_MISC_PRIM_COLOR;
788 }
789 if (c & 0x02) {
790 DPRINTK(" First DETAILED Timing is preferred\n");
791 specs->misc |= FB_MISC_1ST_DETAIL;
792 }
793 if (c & 0x01) {
794 printk(" Display is GTF capable\n");
795 specs->gtf = 1;
796 }
797 }
798
799 static int edid_is_timing_block(unsigned char *block)
800 {
801 if ((block[0] != 0x00) || (block[1] != 0x00) ||
802 (block[2] != 0x00) || (block[4] != 0x00))
803 return 1;
804 else
805 return 0;
806 }
807
808 int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var)
809 {
810 int i;
811 unsigned char *block;
812
813 if (edid == NULL || var == NULL)
814 return 1;
815
816 if (!(edid_checksum(edid)))
817 return 1;
818
819 if (!(edid_check_header(edid)))
820 return 1;
821
822 block = edid + DETAILED_TIMING_DESCRIPTIONS_START;
823
824 for (i = 0; i < 4; i++, block += DETAILED_TIMING_DESCRIPTION_SIZE) {
825 if (edid_is_timing_block(block)) {
826 var->xres = var->xres_virtual = H_ACTIVE;
827 var->yres = var->yres_virtual = V_ACTIVE;
828 var->height = var->width = -1;
829 var->right_margin = H_SYNC_OFFSET;
830 var->left_margin = (H_ACTIVE + H_BLANKING) -
831 (H_ACTIVE + H_SYNC_OFFSET + H_SYNC_WIDTH);
832 var->upper_margin = V_BLANKING - V_SYNC_OFFSET -
833 V_SYNC_WIDTH;
834 var->lower_margin = V_SYNC_OFFSET;
835 var->hsync_len = H_SYNC_WIDTH;
836 var->vsync_len = V_SYNC_WIDTH;
837 var->pixclock = PIXEL_CLOCK;
838 var->pixclock /= 1000;
839 var->pixclock = KHZ2PICOS(var->pixclock);
840
841 if (HSYNC_POSITIVE)
842 var->sync |= FB_SYNC_HOR_HIGH_ACT;
843 if (VSYNC_POSITIVE)
844 var->sync |= FB_SYNC_VERT_HIGH_ACT;
845 return 0;
846 }
847 }
848 return 1;
849 }
850
851 void fb_edid_to_monspecs(unsigned char *edid, struct fb_monspecs *specs)
852 {
853 unsigned char *block;
854 int i, found = 0;
855
856 if (edid == NULL)
857 return;
858
859 if (!(edid_checksum(edid)))
860 return;
861
862 if (!(edid_check_header(edid)))
863 return;
864
865 memset(specs, 0, sizeof(struct fb_monspecs));
866
867 specs->version = edid[EDID_STRUCT_VERSION];
868 specs->revision = edid[EDID_STRUCT_REVISION];
869
870 DPRINTK("========================================\n");
871 DPRINTK("Display Information (EDID)\n");
872 DPRINTK("========================================\n");
873 DPRINTK(" EDID Version %d.%d\n", (int) specs->version,
874 (int) specs->revision);
875
876 parse_vendor_block(edid + ID_MANUFACTURER_NAME, specs);
877
878 block = edid + DETAILED_TIMING_DESCRIPTIONS_START;
879 for (i = 0; i < 4; i++, block += DETAILED_TIMING_DESCRIPTION_SIZE) {
880 if (edid_is_serial_block(block)) {
881 copy_string(block, specs->serial_no);
882 DPRINTK(" Serial Number: %s\n", specs->serial_no);
883 } else if (edid_is_ascii_block(block)) {
884 copy_string(block, specs->ascii);
885 DPRINTK(" ASCII Block: %s\n", specs->ascii);
886 } else if (edid_is_monitor_block(block)) {
887 copy_string(block, specs->monitor);
888 DPRINTK(" Monitor Name: %s\n", specs->monitor);
889 }
890 }
891
892 DPRINTK(" Display Characteristics:\n");
893 get_monspecs(edid, specs);
894
895 specs->modedb = fb_create_modedb(edid, &specs->modedb_len);
896
897 /*
898 * Workaround for buggy EDIDs that sets that the first
899 * detailed timing is preferred but has not detailed
900 * timing specified
901 */
902 for (i = 0; i < specs->modedb_len; i++) {
903 if (specs->modedb[i].flag & FB_MODE_IS_DETAILED) {
904 found = 1;
905 break;
906 }
907 }
908
909 if (!found)
910 specs->misc &= ~FB_MISC_1ST_DETAIL;
911
912 DPRINTK("========================================\n");
913 }
914
915 /*
916 * VESA Generalized Timing Formula (GTF)
917 */
918
919 #define FLYBACK 550
920 #define V_FRONTPORCH 1
921 #define H_OFFSET 40
922 #define H_SCALEFACTOR 20
923 #define H_BLANKSCALE 128
924 #define H_GRADIENT 600
925 #define C_VAL 30
926 #define M_VAL 300
927
928 struct __fb_timings {
929 u32 dclk;
930 u32 hfreq;
931 u32 vfreq;
932 u32 hactive;
933 u32 vactive;
934 u32 hblank;
935 u32 vblank;
936 u32 htotal;
937 u32 vtotal;
938 };
939
940 /**
941 * fb_get_vblank - get vertical blank time
942 * @hfreq: horizontal freq
943 *
944 * DESCRIPTION:
945 * vblank = right_margin + vsync_len + left_margin
946 *
947 * given: right_margin = 1 (V_FRONTPORCH)
948 * vsync_len = 3
949 * flyback = 550
950 *
951 * flyback * hfreq
952 * left_margin = --------------- - vsync_len
953 * 1000000
954 */
955 static u32 fb_get_vblank(u32 hfreq)
956 {
957 u32 vblank;
958
959 vblank = (hfreq * FLYBACK)/1000;
960 vblank = (vblank + 500)/1000;
961 return (vblank + V_FRONTPORCH);
962 }
963
964 /**
965 * fb_get_hblank_by_freq - get horizontal blank time given hfreq
966 * @hfreq: horizontal freq
967 * @xres: horizontal resolution in pixels
968 *
969 * DESCRIPTION:
970 *
971 * xres * duty_cycle
972 * hblank = ------------------
973 * 100 - duty_cycle
974 *
975 * duty cycle = percent of htotal assigned to inactive display
976 * duty cycle = C - (M/Hfreq)
977 *
978 * where: C = ((offset - scale factor) * blank_scale)
979 * -------------------------------------- + scale factor
980 * 256
981 * M = blank_scale * gradient
982 *
983 */
984 static u32 fb_get_hblank_by_hfreq(u32 hfreq, u32 xres)
985 {
986 u32 c_val, m_val, duty_cycle, hblank;
987
988 c_val = (((H_OFFSET - H_SCALEFACTOR) * H_BLANKSCALE)/256 +
989 H_SCALEFACTOR) * 1000;
990 m_val = (H_BLANKSCALE * H_GRADIENT)/256;
991 m_val = (m_val * 1000000)/hfreq;
992 duty_cycle = c_val - m_val;
993 hblank = (xres * duty_cycle)/(100000 - duty_cycle);
994 return (hblank);
995 }
996
997 /**
998 * fb_get_hblank_by_dclk - get horizontal blank time given pixelclock
999 * @dclk: pixelclock in Hz
1000 * @xres: horizontal resolution in pixels
1001 *
1002 * DESCRIPTION:
1003 *
1004 * xres * duty_cycle
1005 * hblank = ------------------
1006 * 100 - duty_cycle
1007 *
1008 * duty cycle = percent of htotal assigned to inactive display
1009 * duty cycle = C - (M * h_period)
1010 *
1011 * where: h_period = SQRT(100 - C + (0.4 * xres * M)/dclk) + C - 100
1012 * -----------------------------------------------
1013 * 2 * M
1014 * M = 300;
1015 * C = 30;
1016
1017 */
1018 static u32 fb_get_hblank_by_dclk(u32 dclk, u32 xres)
1019 {
1020 u32 duty_cycle, h_period, hblank;
1021
1022 dclk /= 1000;
1023 h_period = 100 - C_VAL;
1024 h_period *= h_period;
1025 h_period += (M_VAL * xres * 2 * 1000)/(5 * dclk);
1026 h_period *=10000;
1027
1028 h_period = int_sqrt(h_period);
1029 h_period -= (100 - C_VAL) * 100;
1030 h_period *= 1000;
1031 h_period /= 2 * M_VAL;
1032
1033 duty_cycle = C_VAL * 1000 - (M_VAL * h_period)/100;
1034 hblank = (xres * duty_cycle)/(100000 - duty_cycle) + 8;
1035 hblank &= ~15;
1036 return (hblank);
1037 }
1038
1039 /**
1040 * fb_get_hfreq - estimate hsync
1041 * @vfreq: vertical refresh rate
1042 * @yres: vertical resolution
1043 *
1044 * DESCRIPTION:
1045 *
1046 * (yres + front_port) * vfreq * 1000000
1047 * hfreq = -------------------------------------
1048 * (1000000 - (vfreq * FLYBACK)
1049 *
1050 */
1051
1052 static u32 fb_get_hfreq(u32 vfreq, u32 yres)
1053 {
1054 u32 divisor, hfreq;
1055
1056 divisor = (1000000 - (vfreq * FLYBACK))/1000;
1057 hfreq = (yres + V_FRONTPORCH) * vfreq * 1000;
1058 return (hfreq/divisor);
1059 }
1060
1061 static void fb_timings_vfreq(struct __fb_timings *timings)
1062 {
1063 timings->hfreq = fb_get_hfreq(timings->vfreq, timings->vactive);
1064 timings->vblank = fb_get_vblank(timings->hfreq);
1065 timings->vtotal = timings->vactive + timings->vblank;
1066 timings->hblank = fb_get_hblank_by_hfreq(timings->hfreq,
1067 timings->hactive);
1068 timings->htotal = timings->hactive + timings->hblank;
1069 timings->dclk = timings->htotal * timings->hfreq;
1070 }
1071
1072 static void fb_timings_hfreq(struct __fb_timings *timings)
1073 {
1074 timings->vblank = fb_get_vblank(timings->hfreq);
1075 timings->vtotal = timings->vactive + timings->vblank;
1076 timings->vfreq = timings->hfreq/timings->vtotal;
1077 timings->hblank = fb_get_hblank_by_hfreq(timings->hfreq,
1078 timings->hactive);
1079 timings->htotal = timings->hactive + timings->hblank;
1080 timings->dclk = timings->htotal * timings->hfreq;
1081 }
1082
1083 static void fb_timings_dclk(struct __fb_timings *timings)
1084 {
1085 timings->hblank = fb_get_hblank_by_dclk(timings->dclk,
1086 timings->hactive);
1087 timings->htotal = timings->hactive + timings->hblank;
1088 timings->hfreq = timings->dclk/timings->htotal;
1089 timings->vblank = fb_get_vblank(timings->hfreq);
1090 timings->vtotal = timings->vactive + timings->vblank;
1091 timings->vfreq = timings->hfreq/timings->vtotal;
1092 }
1093
1094 /*
1095 * fb_get_mode - calculates video mode using VESA GTF
1096 * @flags: if: 0 - maximize vertical refresh rate
1097 * 1 - vrefresh-driven calculation;
1098 * 2 - hscan-driven calculation;
1099 * 3 - pixelclock-driven calculation;
1100 * @val: depending on @flags, ignored, vrefresh, hsync or pixelclock
1101 * @var: pointer to fb_var_screeninfo
1102 * @info: pointer to fb_info
1103 *
1104 * DESCRIPTION:
1105 * Calculates video mode based on monitor specs using VESA GTF.
1106 * The GTF is best for VESA GTF compliant monitors but is
1107 * specifically formulated to work for older monitors as well.
1108 *
1109 * If @flag==0, the function will attempt to maximize the
1110 * refresh rate. Otherwise, it will calculate timings based on
1111 * the flag and accompanying value.
1112 *
1113 * If FB_IGNOREMON bit is set in @flags, monitor specs will be
1114 * ignored and @var will be filled with the calculated timings.
1115 *
1116 * All calculations are based on the VESA GTF Spreadsheet
1117 * available at VESA's public ftp (http://www.vesa.org).
1118 *
1119 * NOTES:
1120 * The timings generated by the GTF will be different from VESA
1121 * DMT. It might be a good idea to keep a table of standard
1122 * VESA modes as well. The GTF may also not work for some displays,
1123 * such as, and especially, analog TV.
1124 *
1125 * REQUIRES:
1126 * A valid info->monspecs, otherwise 'safe numbers' will be used.
1127 */
1128 int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var, struct fb_info *info)
1129 {
1130 struct __fb_timings *timings;
1131 u32 interlace = 1, dscan = 1;
1132 u32 hfmin, hfmax, vfmin, vfmax, dclkmin, dclkmax, err = 0;
1133
1134
1135 timings = kzalloc(sizeof(struct __fb_timings), GFP_KERNEL);
1136
1137 if (!timings)
1138 return -ENOMEM;
1139
1140 /*
1141 * If monspecs are invalid, use values that are enough
1142 * for 640x480@60
1143 */
1144 if (!info || !info->monspecs.hfmax || !info->monspecs.vfmax ||
1145 !info->monspecs.dclkmax ||
1146 info->monspecs.hfmax < info->monspecs.hfmin ||
1147 info->monspecs.vfmax < info->monspecs.vfmin ||
1148 info->monspecs.dclkmax < info->monspecs.dclkmin) {
1149 hfmin = 29000; hfmax = 30000;
1150 vfmin = 60; vfmax = 60;
1151 dclkmin = 0; dclkmax = 25000000;
1152 } else {
1153 hfmin = info->monspecs.hfmin;
1154 hfmax = info->monspecs.hfmax;
1155 vfmin = info->monspecs.vfmin;
1156 vfmax = info->monspecs.vfmax;
1157 dclkmin = info->monspecs.dclkmin;
1158 dclkmax = info->monspecs.dclkmax;
1159 }
1160
1161 timings->hactive = var->xres;
1162 timings->vactive = var->yres;
1163 if (var->vmode & FB_VMODE_INTERLACED) {
1164 timings->vactive /= 2;
1165 interlace = 2;
1166 }
1167 if (var->vmode & FB_VMODE_DOUBLE) {
1168 timings->vactive *= 2;
1169 dscan = 2;
1170 }
1171
1172 switch (flags & ~FB_IGNOREMON) {
1173 case FB_MAXTIMINGS: /* maximize refresh rate */
1174 timings->hfreq = hfmax;
1175 fb_timings_hfreq(timings);
1176 if (timings->vfreq > vfmax) {
1177 timings->vfreq = vfmax;
1178 fb_timings_vfreq(timings);
1179 }
1180 if (timings->dclk > dclkmax) {
1181 timings->dclk = dclkmax;
1182 fb_timings_dclk(timings);
1183 }
1184 break;
1185 case FB_VSYNCTIMINGS: /* vrefresh driven */
1186 timings->vfreq = val;
1187 fb_timings_vfreq(timings);
1188 break;
1189 case FB_HSYNCTIMINGS: /* hsync driven */
1190 timings->hfreq = val;
1191 fb_timings_hfreq(timings);
1192 break;
1193 case FB_DCLKTIMINGS: /* pixelclock driven */
1194 timings->dclk = PICOS2KHZ(val) * 1000;
1195 fb_timings_dclk(timings);
1196 break;
1197 default:
1198 err = -EINVAL;
1199
1200 }
1201
1202 if (err || (!(flags & FB_IGNOREMON) &&
1203 (timings->vfreq < vfmin || timings->vfreq > vfmax ||
1204 timings->hfreq < hfmin || timings->hfreq > hfmax ||
1205 timings->dclk < dclkmin || timings->dclk > dclkmax))) {
1206 err = -EINVAL;
1207 } else {
1208 var->pixclock = KHZ2PICOS(timings->dclk/1000);
1209 var->hsync_len = (timings->htotal * 8)/100;
1210 var->right_margin = (timings->hblank/2) - var->hsync_len;
1211 var->left_margin = timings->hblank - var->right_margin -
1212 var->hsync_len;
1213 var->vsync_len = (3 * interlace)/dscan;
1214 var->lower_margin = (1 * interlace)/dscan;
1215 var->upper_margin = (timings->vblank * interlace)/dscan -
1216 (var->vsync_len + var->lower_margin);
1217 }
1218
1219 kfree(timings);
1220 return err;
1221 }
1222 #else
1223 int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var)
1224 {
1225 return 1;
1226 }
1227 void fb_edid_to_monspecs(unsigned char *edid, struct fb_monspecs *specs)
1228 {
1229 specs = NULL;
1230 }
1231 void fb_destroy_modedb(struct fb_videomode *modedb)
1232 {
1233 }
1234 int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var,
1235 struct fb_info *info)
1236 {
1237 return -EINVAL;
1238 }
1239 #endif /* CONFIG_FB_MODE_HELPERS */
1240
1241 /*
1242 * fb_validate_mode - validates var against monitor capabilities
1243 * @var: pointer to fb_var_screeninfo
1244 * @info: pointer to fb_info
1245 *
1246 * DESCRIPTION:
1247 * Validates video mode against monitor capabilities specified in
1248 * info->monspecs.
1249 *
1250 * REQUIRES:
1251 * A valid info->monspecs.
1252 */
1253 int fb_validate_mode(const struct fb_var_screeninfo *var, struct fb_info *info)
1254 {
1255 u32 hfreq, vfreq, htotal, vtotal, pixclock;
1256 u32 hfmin, hfmax, vfmin, vfmax, dclkmin, dclkmax;
1257
1258 /*
1259 * If monspecs are invalid, use values that are enough
1260 * for 640x480@60
1261 */
1262 if (!info->monspecs.hfmax || !info->monspecs.vfmax ||
1263 !info->monspecs.dclkmax ||
1264 info->monspecs.hfmax < info->monspecs.hfmin ||
1265 info->monspecs.vfmax < info->monspecs.vfmin ||
1266 info->monspecs.dclkmax < info->monspecs.dclkmin) {
1267 hfmin = 29000; hfmax = 30000;
1268 vfmin = 60; vfmax = 60;
1269 dclkmin = 0; dclkmax = 25000000;
1270 } else {
1271 hfmin = info->monspecs.hfmin;
1272 hfmax = info->monspecs.hfmax;
1273 vfmin = info->monspecs.vfmin;
1274 vfmax = info->monspecs.vfmax;
1275 dclkmin = info->monspecs.dclkmin;
1276 dclkmax = info->monspecs.dclkmax;
1277 }
1278
1279 if (!var->pixclock)
1280 return -EINVAL;
1281 pixclock = PICOS2KHZ(var->pixclock) * 1000;
1282
1283 htotal = var->xres + var->right_margin + var->hsync_len +
1284 var->left_margin;
1285 vtotal = var->yres + var->lower_margin + var->vsync_len +
1286 var->upper_margin;
1287
1288 if (var->vmode & FB_VMODE_INTERLACED)
1289 vtotal /= 2;
1290 if (var->vmode & FB_VMODE_DOUBLE)
1291 vtotal *= 2;
1292
1293 hfreq = pixclock/htotal;
1294 hfreq = (hfreq + 500) / 1000 * 1000;
1295
1296 vfreq = hfreq/vtotal;
1297
1298 return (vfreq < vfmin || vfreq > vfmax ||
1299 hfreq < hfmin || hfreq > hfmax ||
1300 pixclock < dclkmin || pixclock > dclkmax) ?
1301 -EINVAL : 0;
1302 }
1303
1304 #if defined(CONFIG_FIRMWARE_EDID) && defined(CONFIG_X86)
1305
1306 /*
1307 * We need to ensure that the EDID block is only returned for
1308 * the primary graphics adapter.
1309 */
1310
1311 const unsigned char *fb_firmware_edid(struct device *device)
1312 {
1313 struct pci_dev *dev = NULL;
1314 struct resource *res = NULL;
1315 unsigned char *edid = NULL;
1316
1317 if (device)
1318 dev = to_pci_dev(device);
1319
1320 if (dev)
1321 res = &dev->resource[PCI_ROM_RESOURCE];
1322
1323 if (res && res->flags & IORESOURCE_ROM_SHADOW)
1324 edid = edid_info.dummy;
1325
1326 return edid;
1327 }
1328 #else
1329 const unsigned char *fb_firmware_edid(struct device *device)
1330 {
1331 return NULL;
1332 }
1333 #endif
1334 EXPORT_SYMBOL(fb_firmware_edid);
1335
1336 EXPORT_SYMBOL(fb_parse_edid);
1337 EXPORT_SYMBOL(fb_edid_to_monspecs);
1338 EXPORT_SYMBOL(fb_get_mode);
1339 EXPORT_SYMBOL(fb_validate_mode);
1340 EXPORT_SYMBOL(fb_destroy_modedb);
linux 2.6 git repository for openrd