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[PATCH] fbcon: Code cleanups
[deliverable/linux.git] / drivers / video / fbmon.c
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1da177e4
LT		 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>
5e518d76 32#include <video/edid.h>
1da177e4
LT		 33#ifdef CONFIG_PPC_OF
34#include <linux/pci.h>
35#include <asm/prom.h>
36#include <asm/pci-bridge.h>
37#endif
1da177e4
LT		 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
56struct broken_edid {
57 u8 manufacturer[4];
58 u32 model;
59 u32 fix;
60};
61
62static 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
77static const unsigned char edid_v1_header[] = { 0x00, 0xff, 0xff, 0xff,
78 0xff, 0xff, 0xff, 0x00
79};
80
81static 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
91static 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
135static 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
152static 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
173static 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
188static 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
206static 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
222static 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
277static 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
287static 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
297static 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
307static 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
61ab7903
AD		 317static void calc_mode_timings(int xres, int yres, int refresh,
318 struct fb_videomode *mode)
1da177e4 319{
af5d0f7e 320 struct fb_var_screeninfo *var;
1da177e4 321
af5d0f7e
AD		 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 }
1da177e4
LT		 343}
344
345static 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
430static 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
469static 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
480static 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 */
525static 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 = kmalloc(50 * sizeof(struct fb_videomode), GFP_KERNEL);
532 if (mode == NULL)
533 return NULL;
534 memset(mode, 0, 50 * sizeof(struct fb_videomode));
535
536 if (edid == NULL || !edid_checksum(edid) ||
537 !edid_check_header(edid)) {
538 kfree(mode);
539 return NULL;
540 }
541
542 *dbsize = 0;
543
1da177e4
LT		 544 DPRINTK(" Detailed Timings\n");
545 block = edid + DETAILED_TIMING_DESCRIPTIONS_START;
546 for (i = 0; i < 4; i++, block+= DETAILED_TIMING_DESCRIPTION_SIZE) {
547 int first = 1;
548
14c8102f 549 if (!(block[0] == 0x00 && block[1] == 0x00)) {
1da177e4
LT		 550 get_detailed_timing(block, &mode[num]);
551 if (first) {
552 mode[num].flag |= FB_MODE_IS_FIRST;
553 first = 0;
554 }
555 num++;
556 }
557 }
14c8102f
AD		 558
559 DPRINTK(" Supported VESA Modes\n");
560 block = edid + ESTABLISHED_TIMING_1;
561 num += get_est_timing(block, &mode[num]);
562
563 DPRINTK(" Standard Timings\n");
564 block = edid + STD_TIMING_DESCRIPTIONS_START;
565 for (i = 0; i < STD_TIMING; i++, block += STD_TIMING_DESCRIPTION_SIZE)
566 num += get_std_timing(block, &mode[num]);
567
568 block = edid + DETAILED_TIMING_DESCRIPTIONS_START;
569 for (i = 0; i < 4; i++, block+= DETAILED_TIMING_DESCRIPTION_SIZE) {
570 if (block[0] == 0x00 && block[1] == 0x00 && block[3] == 0xfa)
571 num += get_dst_timing(block + 5, &mode[num]);
572 }
1da177e4
LT		 573
574 /* Yikes, EDID data is totally useless */
575 if (!num) {
576 kfree(mode);
577 return NULL;
578 }
579
580 *dbsize = num;
581 m = kmalloc(num * sizeof(struct fb_videomode), GFP_KERNEL);
582 if (!m)
583 return mode;
584 memmove(m, mode, num * sizeof(struct fb_videomode));
585 kfree(mode);
586 return m;
587}
588
589/**
590 * fb_destroy_modedb - destroys mode database
591 * @modedb: mode database to destroy
592 *
593 * DESCRIPTION:
594 * Destroy mode database created by fb_create_modedb
595 */
596void fb_destroy_modedb(struct fb_videomode *modedb)
597{
598 kfree(modedb);
599}
600
601static int fb_get_monitor_limits(unsigned char *edid, struct fb_monspecs *specs)
602{
603 int i, retval = 1;
604 unsigned char *block;
605
606 block = edid + DETAILED_TIMING_DESCRIPTIONS_START;
607
608 DPRINTK(" Monitor Operating Limits: ");
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;
626 int num_modes, i, hz, hscan, pixclock;
627
628 modes = fb_create_modedb(edid, &num_modes);
629 if (!modes) {
630 DPRINTK("None Available\n");
631 return 1;
632 }
633
634 retval = 0;
635 for (i = 0; i < num_modes; i++) {
636 hz = modes[i].refresh;
637 pixclock = PICOS2KHZ(modes[i].pixclock) * 1000;
638 hscan = (modes[i].yres * 105 * hz + 5000)/100;
639
640 if (specs->dclkmax == 0 || specs->dclkmax < pixclock)
641 specs->dclkmax = pixclock;
642 if (specs->dclkmin == 0 || specs->dclkmin > pixclock)
643 specs->dclkmin = pixclock;
644 if (specs->hfmax == 0 || specs->hfmax < hscan)
645 specs->hfmax = hscan;
646 if (specs->hfmin == 0 || specs->hfmin > hscan)
647 specs->hfmin = hscan;
648 if (specs->vfmax == 0 || specs->vfmax < hz)
649 specs->vfmax = hz;
650 if (specs->vfmin == 0 || specs->vfmin > hz)
651 specs->vfmin = hz;
652 }
653 DPRINTK("Extrapolated\n");
654 fb_destroy_modedb(modes);
655 }
656 DPRINTK(" H: %d-%dKHz V: %d-%dHz DCLK: %dMHz\n",
657 specs->hfmin/1000, specs->hfmax/1000, specs->vfmin,
658 specs->vfmax, specs->dclkmax/1000000);
659 return retval;
660}
661
662static void get_monspecs(unsigned char *edid, struct fb_monspecs *specs)
663{
664 unsigned char c, *block;
665
666 block = edid + EDID_STRUCT_DISPLAY;
667
668 fb_get_monitor_limits(edid, specs);
669
670 c = block[0] & 0x80;
671 specs->input = 0;
672 if (c) {
673 specs->input |= FB_DISP_DDI;
674 DPRINTK(" Digital Display Input");
675 } else {
676 DPRINTK(" Analog Display Input: Input Voltage - ");
677 switch ((block[0] & 0x60) >> 5) {
678 case 0:
679 DPRINTK("0.700V/0.300V");
680 specs->input |= FB_DISP_ANA_700_300;
681 break;
682 case 1:
683 DPRINTK("0.714V/0.286V");
684 specs->input |= FB_DISP_ANA_714_286;
685 break;
686 case 2:
687 DPRINTK("1.000V/0.400V");
688 specs->input |= FB_DISP_ANA_1000_400;
689 break;
690 case 3:
691 DPRINTK("0.700V/0.000V");
692 specs->input |= FB_DISP_ANA_700_000;
693 break;
694 }
695 }
696 DPRINTK("\n Sync: ");
697 c = block[0] & 0x10;
698 if (c)
699 DPRINTK(" Configurable signal level\n");
700 c = block[0] & 0x0f;
701 specs->signal = 0;
702 if (c & 0x10) {
703 DPRINTK("Blank to Blank ");
704 specs->signal |= FB_SIGNAL_BLANK_BLANK;
705 }
706 if (c & 0x08) {
707 DPRINTK("Separate ");
708 specs->signal |= FB_SIGNAL_SEPARATE;
709 }
710 if (c & 0x04) {
711 DPRINTK("Composite ");
712 specs->signal |= FB_SIGNAL_COMPOSITE;
713 }
714 if (c & 0x02) {
715 DPRINTK("Sync on Green ");
716 specs->signal |= FB_SIGNAL_SYNC_ON_GREEN;
717 }
718 if (c & 0x01) {
719 DPRINTK("Serration on ");
720 specs->signal |= FB_SIGNAL_SERRATION_ON;
721 }
722 DPRINTK("\n");
723 specs->max_x = block[1];
724 specs->max_y = block[2];
725 DPRINTK(" Max H-size in cm: ");
726 if (specs->max_x)
727 DPRINTK("%d\n", specs->max_x);
728 else
729 DPRINTK("variable\n");
730 DPRINTK(" Max V-size in cm: ");
731 if (specs->max_y)
732 DPRINTK("%d\n", specs->max_y);
733 else
734 DPRINTK("variable\n");
735
736 c = block[3];
737 specs->gamma = c+100;
738 DPRINTK(" Gamma: ");
739 DPRINTK("%d.%d\n", specs->gamma/100, specs->gamma % 100);
740
741 get_dpms_capabilities(block[4], specs);
742
743 switch ((block[4] & 0x18) >> 3) {
744 case 0:
745 DPRINTK(" Monochrome/Grayscale\n");
746 specs->input |= FB_DISP_MONO;
747 break;
748 case 1:
749 DPRINTK(" RGB Color Display\n");
750 specs->input |= FB_DISP_RGB;
751 break;
752 case 2:
753 DPRINTK(" Non-RGB Multicolor Display\n");
754 specs->input |= FB_DISP_MULTI;
755 break;
756 default:
757 DPRINTK(" Unknown\n");
758 specs->input |= FB_DISP_UNKNOWN;
759 break;
760 }
761
762 get_chroma(block, specs);
763
764 specs->misc = 0;
765 c = block[4] & 0x7;
766 if (c & 0x04) {
767 DPRINTK(" Default color format is primary\n");
768 specs->misc |= FB_MISC_PRIM_COLOR;
769 }
770 if (c & 0x02) {
771 DPRINTK(" First DETAILED Timing is preferred\n");
772 specs->misc |= FB_MISC_1ST_DETAIL;
773 }
774 if (c & 0x01) {
775 printk(" Display is GTF capable\n");
776 specs->gtf = 1;
777 }
778}
779
780static int edid_is_timing_block(unsigned char *block)
781{
782 if ((block[0] != 0x00) || (block[1] != 0x00) ||
783 (block[2] != 0x00) || (block[4] != 0x00))
784 return 1;
785 else
786 return 0;
787}
788
789int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var)
790{
791 int i;
792 unsigned char *block;
793
794 if (edid == NULL || var == NULL)
795 return 1;
796
797 if (!(edid_checksum(edid)))
798 return 1;
799
800 if (!(edid_check_header(edid)))
801 return 1;
802
803 block = edid + DETAILED_TIMING_DESCRIPTIONS_START;
804
805 for (i = 0; i < 4; i++, block += DETAILED_TIMING_DESCRIPTION_SIZE) {
806 if (edid_is_timing_block(block)) {
807 var->xres = var->xres_virtual = H_ACTIVE;
808 var->yres = var->yres_virtual = V_ACTIVE;
809 var->height = var->width = -1;
810 var->right_margin = H_SYNC_OFFSET;
811 var->left_margin = (H_ACTIVE + H_BLANKING) -
812 (H_ACTIVE + H_SYNC_OFFSET + H_SYNC_WIDTH);
813 var->upper_margin = V_BLANKING - V_SYNC_OFFSET -
814 V_SYNC_WIDTH;
815 var->lower_margin = V_SYNC_OFFSET;
816 var->hsync_len = H_SYNC_WIDTH;
817 var->vsync_len = V_SYNC_WIDTH;
818 var->pixclock = PIXEL_CLOCK;
819 var->pixclock /= 1000;
820 var->pixclock = KHZ2PICOS(var->pixclock);
821
822 if (HSYNC_POSITIVE)
823 var->sync |= FB_SYNC_HOR_HIGH_ACT;
824 if (VSYNC_POSITIVE)
825 var->sync |= FB_SYNC_VERT_HIGH_ACT;
826 return 0;
827 }
828 }
829 return 1;
830}
831
832void fb_edid_to_monspecs(unsigned char *edid, struct fb_monspecs *specs)
833{
834 unsigned char *block;
475666d4 835 int i, found = 0;
1da177e4
LT		 836
837 if (edid == NULL)
838 return;
839
840 if (!(edid_checksum(edid)))
841 return;
842
843 if (!(edid_check_header(edid)))
844 return;
845
846 memset(specs, 0, sizeof(struct fb_monspecs));
847
848 specs->version = edid[EDID_STRUCT_VERSION];
849 specs->revision = edid[EDID_STRUCT_REVISION];
850
851 DPRINTK("========================================\n");
852 DPRINTK("Display Information (EDID)\n");
853 DPRINTK("========================================\n");
854 DPRINTK(" EDID Version %d.%d\n", (int) specs->version,
855 (int) specs->revision);
856
857 parse_vendor_block(edid + ID_MANUFACTURER_NAME, specs);
858
859 block = edid + DETAILED_TIMING_DESCRIPTIONS_START;
860 for (i = 0; i < 4; i++, block += DETAILED_TIMING_DESCRIPTION_SIZE) {
861 if (edid_is_serial_block(block)) {
862 copy_string(block, specs->serial_no);
863 DPRINTK(" Serial Number: %s\n", specs->serial_no);
864 } else if (edid_is_ascii_block(block)) {
865 copy_string(block, specs->ascii);
866 DPRINTK(" ASCII Block: %s\n", specs->ascii);
867 } else if (edid_is_monitor_block(block)) {
868 copy_string(block, specs->monitor);
869 DPRINTK(" Monitor Name: %s\n", specs->monitor);
870 }
871 }
872
873 DPRINTK(" Display Characteristics:\n");
874 get_monspecs(edid, specs);
875
876 specs->modedb = fb_create_modedb(edid, &specs->modedb_len);
475666d4
AD		 877
878 /*
879 * Workaround for buggy EDIDs that sets that the first
880 * detailed timing is preferred but has not detailed
881 * timing specified
882 */
883 for (i = 0; i < specs->modedb_len; i++) {
884 if (specs->modedb[i].flag & FB_MODE_IS_DETAILED) {
885 found = 1;
886 break;
887 }
888 }
889
890 if (!found)
891 specs->misc &= ~FB_MISC_1ST_DETAIL;
892
1da177e4
LT		 893 DPRINTK("========================================\n");
894}
895
896/*
897 * VESA Generalized Timing Formula (GTF)
898 */
899
900#define FLYBACK 550
901#define V_FRONTPORCH 1
902#define H_OFFSET 40
903#define H_SCALEFACTOR 20
904#define H_BLANKSCALE 128
905#define H_GRADIENT 600
906#define C_VAL 30
907#define M_VAL 300
908
909struct __fb_timings {
910 u32 dclk;
911 u32 hfreq;
912 u32 vfreq;
913 u32 hactive;
914 u32 vactive;
915 u32 hblank;
916 u32 vblank;
917 u32 htotal;
918 u32 vtotal;
919};
920
921/**
922 * fb_get_vblank - get vertical blank time
923 * @hfreq: horizontal freq
924 *
925 * DESCRIPTION:
926 * vblank = right_margin + vsync_len + left_margin
927 *
928 * given: right_margin = 1 (V_FRONTPORCH)
929 * vsync_len = 3
930 * flyback = 550
931 *
932 * flyback * hfreq
933 * left_margin = --------------- - vsync_len
934 * 1000000
935 */
936static u32 fb_get_vblank(u32 hfreq)
937{
938 u32 vblank;
939
940 vblank = (hfreq * FLYBACK)/1000;
941 vblank = (vblank + 500)/1000;
942 return (vblank + V_FRONTPORCH);
943}
944
945/**
946 * fb_get_hblank_by_freq - get horizontal blank time given hfreq
947 * @hfreq: horizontal freq
948 * @xres: horizontal resolution in pixels
949 *
950 * DESCRIPTION:
951 *
952 * xres * duty_cycle
953 * hblank = ------------------
954 * 100 - duty_cycle
955 *
956 * duty cycle = percent of htotal assigned to inactive display
957 * duty cycle = C - (M/Hfreq)
958 *
959 * where: C = ((offset - scale factor) * blank_scale)
960 * -------------------------------------- + scale factor
961 * 256
962 * M = blank_scale * gradient
963 *
964 */
965static u32 fb_get_hblank_by_hfreq(u32 hfreq, u32 xres)
966{
967 u32 c_val, m_val, duty_cycle, hblank;
968
969 c_val = (((H_OFFSET - H_SCALEFACTOR) * H_BLANKSCALE)/256 +
970 H_SCALEFACTOR) * 1000;
971 m_val = (H_BLANKSCALE * H_GRADIENT)/256;
972 m_val = (m_val * 1000000)/hfreq;
973 duty_cycle = c_val - m_val;
974 hblank = (xres * duty_cycle)/(100000 - duty_cycle);
975 return (hblank);
976}
977
978/**
979 * fb_get_hblank_by_dclk - get horizontal blank time given pixelclock
980 * @dclk: pixelclock in Hz
981 * @xres: horizontal resolution in pixels
982 *
983 * DESCRIPTION:
984 *
985 * xres * duty_cycle
986 * hblank = ------------------
987 * 100 - duty_cycle
988 *
989 * duty cycle = percent of htotal assigned to inactive display
990 * duty cycle = C - (M * h_period)
991 *
992 * where: h_period = SQRT(100 - C + (0.4 * xres * M)/dclk) + C - 100
993 * -----------------------------------------------
994 * 2 * M
995 * M = 300;
996 * C = 30;
997
998 */
999static u32 fb_get_hblank_by_dclk(u32 dclk, u32 xres)
1000{
1001 u32 duty_cycle, h_period, hblank;
1002
1003 dclk /= 1000;
1004 h_period = 100 - C_VAL;
1005 h_period *= h_period;
1006 h_period += (M_VAL * xres * 2 * 1000)/(5 * dclk);
1007 h_period *=10000;
1008
1009 h_period = int_sqrt(h_period);
1010 h_period -= (100 - C_VAL) * 100;
1011 h_period *= 1000;
1012 h_period /= 2 * M_VAL;
1013
1014 duty_cycle = C_VAL * 1000 - (M_VAL * h_period)/100;
1015 hblank = (xres * duty_cycle)/(100000 - duty_cycle) + 8;
1016 hblank &= ~15;
1017 return (hblank);
1018}
1019
1020/**
1021 * fb_get_hfreq - estimate hsync
1022 * @vfreq: vertical refresh rate
1023 * @yres: vertical resolution
1024 *
1025 * DESCRIPTION:
1026 *
1027 * (yres + front_port) * vfreq * 1000000
1028 * hfreq = -------------------------------------
1029 * (1000000 - (vfreq * FLYBACK)
1030 *
1031 */
1032
1033static u32 fb_get_hfreq(u32 vfreq, u32 yres)
1034{
1035 u32 divisor, hfreq;
1036
1037 divisor = (1000000 - (vfreq * FLYBACK))/1000;
1038 hfreq = (yres + V_FRONTPORCH) * vfreq * 1000;
1039 return (hfreq/divisor);
1040}
1041
1042static void fb_timings_vfreq(struct __fb_timings *timings)
1043{
1044 timings->hfreq = fb_get_hfreq(timings->vfreq, timings->vactive);
1045 timings->vblank = fb_get_vblank(timings->hfreq);
1046 timings->vtotal = timings->vactive + timings->vblank;
1047 timings->hblank = fb_get_hblank_by_hfreq(timings->hfreq,
1048 timings->hactive);
1049 timings->htotal = timings->hactive + timings->hblank;
1050 timings->dclk = timings->htotal * timings->hfreq;
1051}
1052
1053static void fb_timings_hfreq(struct __fb_timings *timings)
1054{
1055 timings->vblank = fb_get_vblank(timings->hfreq);
1056 timings->vtotal = timings->vactive + timings->vblank;
1057 timings->vfreq = timings->hfreq/timings->vtotal;
1058 timings->hblank = fb_get_hblank_by_hfreq(timings->hfreq,
1059 timings->hactive);
1060 timings->htotal = timings->hactive + timings->hblank;
1061 timings->dclk = timings->htotal * timings->hfreq;
1062}
1063
1064static void fb_timings_dclk(struct __fb_timings *timings)
1065{
1066 timings->hblank = fb_get_hblank_by_dclk(timings->dclk,
1067 timings->hactive);
1068 timings->htotal = timings->hactive + timings->hblank;
1069 timings->hfreq = timings->dclk/timings->htotal;
1070 timings->vblank = fb_get_vblank(timings->hfreq);
1071 timings->vtotal = timings->vactive + timings->vblank;
1072 timings->vfreq = timings->hfreq/timings->vtotal;
1073}
1074
1075/*
1076 * fb_get_mode - calculates video mode using VESA GTF
1077 * @flags: if: 0 - maximize vertical refresh rate
1078 * 1 - vrefresh-driven calculation;
1079 * 2 - hscan-driven calculation;
1080 * 3 - pixelclock-driven calculation;
1081 * @val: depending on @flags, ignored, vrefresh, hsync or pixelclock
1082 * @var: pointer to fb_var_screeninfo
1083 * @info: pointer to fb_info
1084 *
1085 * DESCRIPTION:
1086 * Calculates video mode based on monitor specs using VESA GTF.
1087 * The GTF is best for VESA GTF compliant monitors but is
1088 * specifically formulated to work for older monitors as well.
1089 *
1090 * If @flag==0, the function will attempt to maximize the
1091 * refresh rate. Otherwise, it will calculate timings based on
1092 * the flag and accompanying value.
1093 *
1094 * If FB_IGNOREMON bit is set in @flags, monitor specs will be
1095 * ignored and @var will be filled with the calculated timings.
1096 *
1097 * All calculations are based on the VESA GTF Spreadsheet
1098 * available at VESA's public ftp (http://www.vesa.org).
1099 *
1100 * NOTES:
1101 * The timings generated by the GTF will be different from VESA
1102 * DMT. It might be a good idea to keep a table of standard
1103 * VESA modes as well. The GTF may also not work for some displays,
1104 * such as, and especially, analog TV.
1105 *
1106 * REQUIRES:
1107 * A valid info->monspecs, otherwise 'safe numbers' will be used.
1108 */
1109int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var, struct fb_info *info)
1110{
af5d0f7e 1111 struct __fb_timings *timings;
1da177e4 1112 u32 interlace = 1, dscan = 1;
af5d0f7e
AD		 1113 u32 hfmin, hfmax, vfmin, vfmax, dclkmin, dclkmax, err = 0;
1114
1115
1116 timings = kzalloc(sizeof(struct __fb_timings), GFP_KERNEL);
1117
1118 if (!timings)
1119 return -ENOMEM;
1da177e4
LT		 1120
1121 /*
1122 * If monspecs are invalid, use values that are enough
1123 * for 640x480@60
1124 */
af5d0f7e 1125 if (!info || !info->monspecs.hfmax || !info->monspecs.vfmax ||
1da177e4
LT		 1126 !info->monspecs.dclkmax ||
1127 info->monspecs.hfmax < info->monspecs.hfmin ||
1128 info->monspecs.vfmax < info->monspecs.vfmin ||
1129 info->monspecs.dclkmax < info->monspecs.dclkmin) {
1130 hfmin = 29000; hfmax = 30000;
1131 vfmin = 60; vfmax = 60;
1132 dclkmin = 0; dclkmax = 25000000;
1133 } else {
1134 hfmin = info->monspecs.hfmin;
1135 hfmax = info->monspecs.hfmax;
1136 vfmin = info->monspecs.vfmin;
1137 vfmax = info->monspecs.vfmax;
1138 dclkmin = info->monspecs.dclkmin;
1139 dclkmax = info->monspecs.dclkmax;
1140 }
1141
af5d0f7e
AD		 1142 timings->hactive = var->xres;
1143 timings->vactive = var->yres;
1da177e4 1144 if (var->vmode & FB_VMODE_INTERLACED) {
af5d0f7e 1145 timings->vactive /= 2;
1da177e4
LT		 1146 interlace = 2;
1147 }
1148 if (var->vmode & FB_VMODE_DOUBLE) {
af5d0f7e 1149 timings->vactive *= 2;
1da177e4
LT		 1150 dscan = 2;
1151 }
1152
1153 switch (flags & ~FB_IGNOREMON) {
1154 case FB_MAXTIMINGS: /* maximize refresh rate */
af5d0f7e
AD		 1155 timings->hfreq = hfmax;
1156 fb_timings_hfreq(timings);
1157 if (timings->vfreq > vfmax) {
1158 timings->vfreq = vfmax;
1159 fb_timings_vfreq(timings);
1da177e4 1160 }
af5d0f7e
AD		 1161 if (timings->dclk > dclkmax) {
1162 timings->dclk = dclkmax;
1163 fb_timings_dclk(timings);
1da177e4
LT		 1164 }
1165 break;
1166 case FB_VSYNCTIMINGS: /* vrefresh driven */
af5d0f7e
AD		 1167 timings->vfreq = val;
1168 fb_timings_vfreq(timings);
1da177e4
LT		 1169 break;
1170 case FB_HSYNCTIMINGS: /* hsync driven */
af5d0f7e
AD		 1171 timings->hfreq = val;
1172 fb_timings_hfreq(timings);
1da177e4
LT		 1173 break;
1174 case FB_DCLKTIMINGS: /* pixelclock driven */
af5d0f7e
AD		 1175 timings->dclk = PICOS2KHZ(val) * 1000;
1176 fb_timings_dclk(timings);
1da177e4
LT		 1177 break;
1178 default:
af5d0f7e 1179 err = -EINVAL;
1da177e4
LT		 1180
1181 }
1182
af5d0f7e
AD		 1183 if (err || (!(flags & FB_IGNOREMON) &&
1184 (timings->vfreq < vfmin || timings->vfreq > vfmax ||
1185 timings->hfreq < hfmin || timings->hfreq > hfmax ||
1186 timings->dclk < dclkmin || timings->dclk > dclkmax))) {
1187 err = -EINVAL;
1188 } else {
1189 var->pixclock = KHZ2PICOS(timings->dclk/1000);
1190 var->hsync_len = (timings->htotal * 8)/100;
1191 var->right_margin = (timings->hblank/2) - var->hsync_len;
1192 var->left_margin = timings->hblank - var->right_margin -
1193 var->hsync_len;
1194 var->vsync_len = (3 * interlace)/dscan;
1195 var->lower_margin = (1 * interlace)/dscan;
1196 var->upper_margin = (timings->vblank * interlace)/dscan -
1197 (var->vsync_len + var->lower_margin);
1198 }
1da177e4 1199
af5d0f7e
AD		 1200 kfree(timings);
1201 return err;
1da177e4
LT		 1202}
1203#else
1204int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var)
1205{
1206 return 1;
1207}
1208void fb_edid_to_monspecs(unsigned char *edid, struct fb_monspecs *specs)
1209{
1210 specs = NULL;
1211}
1212void fb_destroy_modedb(struct fb_videomode *modedb)
1213{
1214}
1215int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var,
1216 struct fb_info *info)
1217{
1218 return -EINVAL;
1219}
1220#endif /* CONFIG_FB_MODE_HELPERS */
1221
1222/*
1223 * fb_validate_mode - validates var against monitor capabilities
1224 * @var: pointer to fb_var_screeninfo
1225 * @info: pointer to fb_info
1226 *
1227 * DESCRIPTION:
1228 * Validates video mode against monitor capabilities specified in
1229 * info->monspecs.
1230 *
1231 * REQUIRES:
1232 * A valid info->monspecs.
1233 */
1234int fb_validate_mode(const struct fb_var_screeninfo *var, struct fb_info *info)
1235{
1236 u32 hfreq, vfreq, htotal, vtotal, pixclock;
1237 u32 hfmin, hfmax, vfmin, vfmax, dclkmin, dclkmax;
1238
1239 /*
1240 * If monspecs are invalid, use values that are enough
1241 * for 640x480@60
1242 */
1243 if (!info->monspecs.hfmax || !info->monspecs.vfmax ||
1244 !info->monspecs.dclkmax ||
1245 info->monspecs.hfmax < info->monspecs.hfmin ||
1246 info->monspecs.vfmax < info->monspecs.vfmin ||
1247 info->monspecs.dclkmax < info->monspecs.dclkmin) {
1248 hfmin = 29000; hfmax = 30000;
1249 vfmin = 60; vfmax = 60;
1250 dclkmin = 0; dclkmax = 25000000;
1251 } else {
1252 hfmin = info->monspecs.hfmin;
1253 hfmax = info->monspecs.hfmax;
1254 vfmin = info->monspecs.vfmin;
1255 vfmax = info->monspecs.vfmax;
1256 dclkmin = info->monspecs.dclkmin;
1257 dclkmax = info->monspecs.dclkmax;
1258 }
1259
1260 if (!var->pixclock)
1261 return -EINVAL;
1262 pixclock = PICOS2KHZ(var->pixclock) * 1000;
1263
1264 htotal = var->xres + var->right_margin + var->hsync_len +
1265 var->left_margin;
1266 vtotal = var->yres + var->lower_margin + var->vsync_len +
1267 var->upper_margin;
1268
1269 if (var->vmode & FB_VMODE_INTERLACED)
1270 vtotal /= 2;
1271 if (var->vmode & FB_VMODE_DOUBLE)
1272 vtotal *= 2;
1273
1274 hfreq = pixclock/htotal;
0a793b77
JS		 1275 hfreq = (hfreq + 500) / 1000 * 1000;
1276
1da177e4
LT		 1277 vfreq = hfreq/vtotal;
1278
1279 return (vfreq < vfmin || vfreq > vfmax ||
1280 hfreq < hfmin || hfreq > hfmax ||
1281 pixclock < dclkmin || pixclock > dclkmax) ?
1282 -EINVAL : 0;
1283}
1284
5e518d76
AD		 1285#if defined(__i386__)
1286#include <linux/pci.h>
1287
1288/*
1289 * We need to ensure that the EDID block is only returned for
1290 * the primary graphics adapter.
1291 */
1292
1293const unsigned char *fb_firmware_edid(struct device *device)
1294{
1295 struct pci_dev *dev = NULL;
1296 struct resource *res = NULL;
1297 unsigned char *edid = NULL;
1298
1299 if (device)
1300 dev = to_pci_dev(device);
1301
1302 if (dev)
1303 res = &dev->resource[PCI_ROM_RESOURCE];
1304
1305 if (res && res->flags & IORESOURCE_ROM_SHADOW)
1306 edid = edid_info.dummy;
1307
1308 return edid;
1309}
1310#else
1311const unsigned char *fb_firmware_edid(struct device *device)
1312{
1313 return NULL;
1314}
1315#endif /* _i386_ */
1316
1da177e4
LT		 1317EXPORT_SYMBOL(fb_parse_edid);
1318EXPORT_SYMBOL(fb_edid_to_monspecs);
5e518d76 1319EXPORT_SYMBOL(fb_firmware_edid);
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LT		 1320EXPORT_SYMBOL(fb_get_mode);
1321EXPORT_SYMBOL(fb_validate_mode);
1322EXPORT_SYMBOL(fb_destroy_modedb);
Linux kernel - Deliverables
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