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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: | |
8c85fd89 | 7 | * |
1da177e4 LT |
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> | |
8c85fd89 AH |
15 | * |
16 | * 3. John Fremlin <vii@users.sourceforge.net> and | |
1da177e4 | 17 | * Ani Joshi <ajoshi@unixbox.com> |
8c85fd89 | 18 | * |
1da177e4 LT |
19 | * Generalized Timing Formula is derived from: |
20 | * | |
8c85fd89 | 21 | * GTF Spreadsheet by Andy Morrish (1/5/97) |
1da177e4 LT |
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 | */ | |
1da177e4 LT |
29 | #include <linux/fb.h> |
30 | #include <linux/module.h> | |
22f4a00f | 31 | #include <linux/pci.h> |
5a0e3ad6 | 32 | #include <linux/slab.h> |
5e518d76 | 33 | #include <video/edid.h> |
79089044 | 34 | #include <video/of_videomode.h> |
2db54c72 | 35 | #include <video/videomode.h> |
1da177e4 | 36 | #ifdef CONFIG_PPC_OF |
1da177e4 LT |
37 | #include <asm/prom.h> |
38 | #include <asm/pci-bridge.h> | |
39 | #endif | |
1da177e4 LT |
40 | #include "edid.h" |
41 | ||
8c85fd89 | 42 | /* |
1da177e4 LT |
43 | * EDID parser |
44 | */ | |
45 | ||
46 | #undef DEBUG /* define this for verbose EDID parsing output */ | |
47 | ||
48 | #ifdef DEBUG | |
49 | #define DPRINTK(fmt, args...) printk(fmt,## args) | |
50 | #else | |
51 | #define DPRINTK(fmt, args...) | |
52 | #endif | |
53 | ||
33a9f640 AD |
54 | #define FBMON_FIX_HEADER 1 |
55 | #define FBMON_FIX_INPUT 2 | |
56 | #define FBMON_FIX_TIMINGS 3 | |
1da177e4 LT |
57 | |
58 | #ifdef CONFIG_FB_MODE_HELPERS | |
59 | struct broken_edid { | |
60 | u8 manufacturer[4]; | |
61 | u32 model; | |
62 | u32 fix; | |
63 | }; | |
64 | ||
d95159cf | 65 | static const struct broken_edid brokendb[] = { |
1da177e4 LT |
66 | /* DEC FR-PCXAV-YZ */ |
67 | { | |
68 | .manufacturer = "DEC", | |
69 | .model = 0x073a, | |
70 | .fix = FBMON_FIX_HEADER, | |
71 | }, | |
72 | /* ViewSonic PF775a */ | |
73 | { | |
74 | .manufacturer = "VSC", | |
75 | .model = 0x5a44, | |
76 | .fix = FBMON_FIX_INPUT, | |
77 | }, | |
33a9f640 AD |
78 | /* Sharp UXGA? */ |
79 | { | |
80 | .manufacturer = "SHP", | |
81 | .model = 0x138e, | |
82 | .fix = FBMON_FIX_TIMINGS, | |
83 | }, | |
1da177e4 LT |
84 | }; |
85 | ||
86 | static const unsigned char edid_v1_header[] = { 0x00, 0xff, 0xff, 0xff, | |
87 | 0xff, 0xff, 0xff, 0x00 | |
88 | }; | |
89 | ||
90 | static void copy_string(unsigned char *c, unsigned char *s) | |
91 | { | |
92 | int i; | |
93 | c = c + 5; | |
94 | for (i = 0; (i < 13 && *c != 0x0A); i++) | |
95 | *(s++) = *(c++); | |
96 | *s = 0; | |
97 | while (i-- && (*--s == 0x20)) *s = 0; | |
98 | } | |
99 | ||
33a9f640 AD |
100 | static int edid_is_serial_block(unsigned char *block) |
101 | { | |
102 | if ((block[0] == 0x00) && (block[1] == 0x00) && | |
103 | (block[2] == 0x00) && (block[3] == 0xff) && | |
104 | (block[4] == 0x00)) | |
105 | return 1; | |
106 | else | |
107 | return 0; | |
108 | } | |
109 | ||
110 | static int edid_is_ascii_block(unsigned char *block) | |
111 | { | |
112 | if ((block[0] == 0x00) && (block[1] == 0x00) && | |
113 | (block[2] == 0x00) && (block[3] == 0xfe) && | |
114 | (block[4] == 0x00)) | |
115 | return 1; | |
116 | else | |
117 | return 0; | |
118 | } | |
119 | ||
120 | static int edid_is_limits_block(unsigned char *block) | |
121 | { | |
122 | if ((block[0] == 0x00) && (block[1] == 0x00) && | |
123 | (block[2] == 0x00) && (block[3] == 0xfd) && | |
124 | (block[4] == 0x00)) | |
125 | return 1; | |
126 | else | |
127 | return 0; | |
128 | } | |
129 | ||
130 | static int edid_is_monitor_block(unsigned char *block) | |
131 | { | |
132 | if ((block[0] == 0x00) && (block[1] == 0x00) && | |
133 | (block[2] == 0x00) && (block[3] == 0xfc) && | |
134 | (block[4] == 0x00)) | |
135 | return 1; | |
136 | else | |
137 | return 0; | |
138 | } | |
139 | ||
140 | static int edid_is_timing_block(unsigned char *block) | |
141 | { | |
142 | if ((block[0] != 0x00) || (block[1] != 0x00) || | |
143 | (block[2] != 0x00) || (block[4] != 0x00)) | |
144 | return 1; | |
145 | else | |
146 | return 0; | |
147 | } | |
148 | ||
1da177e4 LT |
149 | static int check_edid(unsigned char *edid) |
150 | { | |
151 | unsigned char *block = edid + ID_MANUFACTURER_NAME, manufacturer[4]; | |
152 | unsigned char *b; | |
153 | u32 model; | |
154 | int i, fix = 0, ret = 0; | |
155 | ||
156 | manufacturer[0] = ((block[0] & 0x7c) >> 2) + '@'; | |
157 | manufacturer[1] = ((block[0] & 0x03) << 3) + | |
158 | ((block[1] & 0xe0) >> 5) + '@'; | |
159 | manufacturer[2] = (block[1] & 0x1f) + '@'; | |
160 | manufacturer[3] = 0; | |
161 | model = block[2] + (block[3] << 8); | |
162 | ||
163 | for (i = 0; i < ARRAY_SIZE(brokendb); i++) { | |
164 | if (!strncmp(manufacturer, brokendb[i].manufacturer, 4) && | |
165 | brokendb[i].model == model) { | |
8c85fd89 AH |
166 | fix = brokendb[i].fix; |
167 | break; | |
1da177e4 LT |
168 | } |
169 | } | |
170 | ||
171 | switch (fix) { | |
172 | case FBMON_FIX_HEADER: | |
173 | for (i = 0; i < 8; i++) { | |
33a9f640 | 174 | if (edid[i] != edid_v1_header[i]) { |
1da177e4 | 175 | ret = fix; |
33a9f640 AD |
176 | break; |
177 | } | |
1da177e4 LT |
178 | } |
179 | break; | |
180 | case FBMON_FIX_INPUT: | |
181 | b = edid + EDID_STRUCT_DISPLAY; | |
182 | /* Only if display is GTF capable will | |
183 | the input type be reset to analog */ | |
184 | if (b[4] & 0x01 && b[0] & 0x80) | |
185 | ret = fix; | |
186 | break; | |
33a9f640 AD |
187 | case FBMON_FIX_TIMINGS: |
188 | b = edid + DETAILED_TIMING_DESCRIPTIONS_START; | |
189 | ret = fix; | |
190 | ||
191 | for (i = 0; i < 4; i++) { | |
192 | if (edid_is_limits_block(b)) { | |
193 | ret = 0; | |
194 | break; | |
195 | } | |
196 | ||
197 | b += DETAILED_TIMING_DESCRIPTION_SIZE; | |
198 | } | |
199 | ||
200 | break; | |
1da177e4 LT |
201 | } |
202 | ||
33a9f640 AD |
203 | if (ret) |
204 | printk("fbmon: The EDID Block of " | |
205 | "Manufacturer: %s Model: 0x%x is known to " | |
206 | "be broken,\n", manufacturer, model); | |
207 | ||
1da177e4 LT |
208 | return ret; |
209 | } | |
210 | ||
211 | static void fix_edid(unsigned char *edid, int fix) | |
212 | { | |
33a9f640 AD |
213 | int i; |
214 | unsigned char *b, csum = 0; | |
1da177e4 LT |
215 | |
216 | switch (fix) { | |
217 | case FBMON_FIX_HEADER: | |
218 | printk("fbmon: trying a header reconstruct\n"); | |
219 | memcpy(edid, edid_v1_header, 8); | |
220 | break; | |
221 | case FBMON_FIX_INPUT: | |
222 | printk("fbmon: trying to fix input type\n"); | |
223 | b = edid + EDID_STRUCT_DISPLAY; | |
224 | b[0] &= ~0x80; | |
225 | edid[127] += 0x80; | |
33a9f640 AD |
226 | break; |
227 | case FBMON_FIX_TIMINGS: | |
228 | printk("fbmon: trying to fix monitor timings\n"); | |
229 | b = edid + DETAILED_TIMING_DESCRIPTIONS_START; | |
230 | for (i = 0; i < 4; i++) { | |
231 | if (!(edid_is_serial_block(b) || | |
232 | edid_is_ascii_block(b) || | |
233 | edid_is_monitor_block(b) || | |
234 | edid_is_timing_block(b))) { | |
235 | b[0] = 0x00; | |
236 | b[1] = 0x00; | |
237 | b[2] = 0x00; | |
238 | b[3] = 0xfd; | |
239 | b[4] = 0x00; | |
240 | b[5] = 60; /* vfmin */ | |
241 | b[6] = 60; /* vfmax */ | |
242 | b[7] = 30; /* hfmin */ | |
243 | b[8] = 75; /* hfmax */ | |
244 | b[9] = 17; /* pixclock - 170 MHz*/ | |
245 | b[10] = 0; /* GTF */ | |
246 | break; | |
247 | } | |
248 | ||
249 | b += DETAILED_TIMING_DESCRIPTION_SIZE; | |
250 | } | |
251 | ||
252 | for (i = 0; i < EDID_LENGTH - 1; i++) | |
253 | csum += edid[i]; | |
254 | ||
255 | edid[127] = 256 - csum; | |
256 | break; | |
1da177e4 LT |
257 | } |
258 | } | |
259 | ||
260 | static int edid_checksum(unsigned char *edid) | |
261 | { | |
3730793d LT |
262 | unsigned char csum = 0, all_null = 0; |
263 | int i, err = 0, fix = check_edid(edid); | |
1da177e4 LT |
264 | |
265 | if (fix) | |
266 | fix_edid(edid, fix); | |
267 | ||
268 | for (i = 0; i < EDID_LENGTH; i++) { | |
269 | csum += edid[i]; | |
270 | all_null |= edid[i]; | |
271 | } | |
272 | ||
273 | if (csum == 0x00 && all_null) { | |
274 | /* checksum passed, everything's good */ | |
275 | err = 1; | |
276 | } | |
277 | ||
278 | return err; | |
279 | } | |
280 | ||
281 | static int edid_check_header(unsigned char *edid) | |
282 | { | |
283 | int i, err = 1, fix = check_edid(edid); | |
284 | ||
285 | if (fix) | |
286 | fix_edid(edid, fix); | |
287 | ||
288 | for (i = 0; i < 8; i++) { | |
289 | if (edid[i] != edid_v1_header[i]) | |
290 | err = 0; | |
291 | } | |
292 | ||
293 | return err; | |
294 | } | |
295 | ||
296 | static void parse_vendor_block(unsigned char *block, struct fb_monspecs *specs) | |
297 | { | |
298 | specs->manufacturer[0] = ((block[0] & 0x7c) >> 2) + '@'; | |
299 | specs->manufacturer[1] = ((block[0] & 0x03) << 3) + | |
300 | ((block[1] & 0xe0) >> 5) + '@'; | |
301 | specs->manufacturer[2] = (block[1] & 0x1f) + '@'; | |
302 | specs->manufacturer[3] = 0; | |
303 | specs->model = block[2] + (block[3] << 8); | |
304 | specs->serial = block[4] + (block[5] << 8) + | |
305 | (block[6] << 16) + (block[7] << 24); | |
306 | specs->year = block[9] + 1990; | |
307 | specs->week = block[8]; | |
308 | DPRINTK(" Manufacturer: %s\n", specs->manufacturer); | |
309 | DPRINTK(" Model: %x\n", specs->model); | |
310 | DPRINTK(" Serial#: %u\n", specs->serial); | |
311 | DPRINTK(" Year: %u Week %u\n", specs->year, specs->week); | |
312 | } | |
313 | ||
314 | static void get_dpms_capabilities(unsigned char flags, | |
315 | struct fb_monspecs *specs) | |
316 | { | |
317 | specs->dpms = 0; | |
318 | if (flags & DPMS_ACTIVE_OFF) | |
319 | specs->dpms |= FB_DPMS_ACTIVE_OFF; | |
320 | if (flags & DPMS_SUSPEND) | |
321 | specs->dpms |= FB_DPMS_SUSPEND; | |
322 | if (flags & DPMS_STANDBY) | |
323 | specs->dpms |= FB_DPMS_STANDBY; | |
324 | DPRINTK(" DPMS: Active %s, Suspend %s, Standby %s\n", | |
325 | (flags & DPMS_ACTIVE_OFF) ? "yes" : "no", | |
326 | (flags & DPMS_SUSPEND) ? "yes" : "no", | |
327 | (flags & DPMS_STANDBY) ? "yes" : "no"); | |
328 | } | |
8c85fd89 | 329 | |
1da177e4 LT |
330 | static void get_chroma(unsigned char *block, struct fb_monspecs *specs) |
331 | { | |
332 | int tmp; | |
333 | ||
334 | DPRINTK(" Chroma\n"); | |
335 | /* Chromaticity data */ | |
336 | tmp = ((block[5] & (3 << 6)) >> 6) | (block[0x7] << 2); | |
337 | tmp *= 1000; | |
338 | tmp += 512; | |
339 | specs->chroma.redx = tmp/1024; | |
340 | DPRINTK(" RedX: 0.%03d ", specs->chroma.redx); | |
341 | ||
342 | tmp = ((block[5] & (3 << 4)) >> 4) | (block[0x8] << 2); | |
343 | tmp *= 1000; | |
344 | tmp += 512; | |
345 | specs->chroma.redy = tmp/1024; | |
346 | DPRINTK("RedY: 0.%03d\n", specs->chroma.redy); | |
347 | ||
348 | tmp = ((block[5] & (3 << 2)) >> 2) | (block[0x9] << 2); | |
349 | tmp *= 1000; | |
350 | tmp += 512; | |
351 | specs->chroma.greenx = tmp/1024; | |
352 | DPRINTK(" GreenX: 0.%03d ", specs->chroma.greenx); | |
353 | ||
354 | tmp = (block[5] & 3) | (block[0xa] << 2); | |
355 | tmp *= 1000; | |
356 | tmp += 512; | |
357 | specs->chroma.greeny = tmp/1024; | |
358 | DPRINTK("GreenY: 0.%03d\n", specs->chroma.greeny); | |
359 | ||
360 | tmp = ((block[6] & (3 << 6)) >> 6) | (block[0xb] << 2); | |
361 | tmp *= 1000; | |
362 | tmp += 512; | |
363 | specs->chroma.bluex = tmp/1024; | |
364 | DPRINTK(" BlueX: 0.%03d ", specs->chroma.bluex); | |
365 | ||
366 | tmp = ((block[6] & (3 << 4)) >> 4) | (block[0xc] << 2); | |
367 | tmp *= 1000; | |
368 | tmp += 512; | |
369 | specs->chroma.bluey = tmp/1024; | |
370 | DPRINTK("BlueY: 0.%03d\n", specs->chroma.bluey); | |
8c85fd89 | 371 | |
1da177e4 LT |
372 | tmp = ((block[6] & (3 << 2)) >> 2) | (block[0xd] << 2); |
373 | tmp *= 1000; | |
374 | tmp += 512; | |
375 | specs->chroma.whitex = tmp/1024; | |
376 | DPRINTK(" WhiteX: 0.%03d ", specs->chroma.whitex); | |
377 | ||
378 | tmp = (block[6] & 3) | (block[0xe] << 2); | |
379 | tmp *= 1000; | |
380 | tmp += 512; | |
381 | specs->chroma.whitey = tmp/1024; | |
382 | DPRINTK("WhiteY: 0.%03d\n", specs->chroma.whitey); | |
383 | } | |
384 | ||
61ab7903 AD |
385 | static void calc_mode_timings(int xres, int yres, int refresh, |
386 | struct fb_videomode *mode) | |
1da177e4 | 387 | { |
af5d0f7e | 388 | struct fb_var_screeninfo *var; |
8c85fd89 | 389 | |
af5d0f7e AD |
390 | var = kzalloc(sizeof(struct fb_var_screeninfo), GFP_KERNEL); |
391 | ||
392 | if (var) { | |
393 | var->xres = xres; | |
394 | var->yres = yres; | |
395 | fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, | |
396 | refresh, var, NULL); | |
397 | mode->xres = xres; | |
398 | mode->yres = yres; | |
399 | mode->pixclock = var->pixclock; | |
400 | mode->refresh = refresh; | |
401 | mode->left_margin = var->left_margin; | |
402 | mode->right_margin = var->right_margin; | |
403 | mode->upper_margin = var->upper_margin; | |
404 | mode->lower_margin = var->lower_margin; | |
405 | mode->hsync_len = var->hsync_len; | |
406 | mode->vsync_len = var->vsync_len; | |
407 | mode->vmode = 0; | |
408 | mode->sync = 0; | |
409 | kfree(var); | |
410 | } | |
1da177e4 LT |
411 | } |
412 | ||
413 | static int get_est_timing(unsigned char *block, struct fb_videomode *mode) | |
414 | { | |
415 | int num = 0; | |
416 | unsigned char c; | |
417 | ||
418 | c = block[0]; | |
419 | if (c&0x80) { | |
420 | calc_mode_timings(720, 400, 70, &mode[num]); | |
421 | mode[num++].flag = FB_MODE_IS_CALCULATED; | |
422 | DPRINTK(" 720x400@70Hz\n"); | |
423 | } | |
424 | if (c&0x40) { | |
425 | calc_mode_timings(720, 400, 88, &mode[num]); | |
426 | mode[num++].flag = FB_MODE_IS_CALCULATED; | |
427 | DPRINTK(" 720x400@88Hz\n"); | |
428 | } | |
429 | if (c&0x20) { | |
430 | mode[num++] = vesa_modes[3]; | |
431 | DPRINTK(" 640x480@60Hz\n"); | |
432 | } | |
433 | if (c&0x10) { | |
434 | calc_mode_timings(640, 480, 67, &mode[num]); | |
435 | mode[num++].flag = FB_MODE_IS_CALCULATED; | |
436 | DPRINTK(" 640x480@67Hz\n"); | |
437 | } | |
438 | if (c&0x08) { | |
439 | mode[num++] = vesa_modes[4]; | |
440 | DPRINTK(" 640x480@72Hz\n"); | |
441 | } | |
442 | if (c&0x04) { | |
443 | mode[num++] = vesa_modes[5]; | |
444 | DPRINTK(" 640x480@75Hz\n"); | |
445 | } | |
446 | if (c&0x02) { | |
447 | mode[num++] = vesa_modes[7]; | |
448 | DPRINTK(" 800x600@56Hz\n"); | |
449 | } | |
450 | if (c&0x01) { | |
451 | mode[num++] = vesa_modes[8]; | |
452 | DPRINTK(" 800x600@60Hz\n"); | |
453 | } | |
454 | ||
455 | c = block[1]; | |
456 | if (c&0x80) { | |
8c85fd89 | 457 | mode[num++] = vesa_modes[9]; |
1da177e4 LT |
458 | DPRINTK(" 800x600@72Hz\n"); |
459 | } | |
460 | if (c&0x40) { | |
8c85fd89 | 461 | mode[num++] = vesa_modes[10]; |
1da177e4 LT |
462 | DPRINTK(" 800x600@75Hz\n"); |
463 | } | |
464 | if (c&0x20) { | |
465 | calc_mode_timings(832, 624, 75, &mode[num]); | |
466 | mode[num++].flag = FB_MODE_IS_CALCULATED; | |
467 | DPRINTK(" 832x624@75Hz\n"); | |
468 | } | |
469 | if (c&0x10) { | |
470 | mode[num++] = vesa_modes[12]; | |
471 | DPRINTK(" 1024x768@87Hz Interlaced\n"); | |
472 | } | |
473 | if (c&0x08) { | |
474 | mode[num++] = vesa_modes[13]; | |
475 | DPRINTK(" 1024x768@60Hz\n"); | |
476 | } | |
477 | if (c&0x04) { | |
478 | mode[num++] = vesa_modes[14]; | |
479 | DPRINTK(" 1024x768@70Hz\n"); | |
480 | } | |
481 | if (c&0x02) { | |
482 | mode[num++] = vesa_modes[15]; | |
483 | DPRINTK(" 1024x768@75Hz\n"); | |
484 | } | |
485 | if (c&0x01) { | |
486 | mode[num++] = vesa_modes[21]; | |
487 | DPRINTK(" 1280x1024@75Hz\n"); | |
488 | } | |
489 | c = block[2]; | |
490 | if (c&0x80) { | |
491 | mode[num++] = vesa_modes[17]; | |
492 | DPRINTK(" 1152x870@75Hz\n"); | |
493 | } | |
494 | DPRINTK(" Manufacturer's mask: %x\n",c&0x7F); | |
495 | return num; | |
496 | } | |
497 | ||
43dcd13b TV |
498 | static int get_std_timing(unsigned char *block, struct fb_videomode *mode, |
499 | int ver, int rev) | |
1da177e4 LT |
500 | { |
501 | int xres, yres = 0, refresh, ratio, i; | |
8c85fd89 | 502 | |
1da177e4 LT |
503 | xres = (block[0] + 31) * 8; |
504 | if (xres <= 256) | |
505 | return 0; | |
506 | ||
507 | ratio = (block[1] & 0xc0) >> 6; | |
508 | switch (ratio) { | |
509 | case 0: | |
43dcd13b TV |
510 | /* in EDID 1.3 the meaning of 0 changed to 16:10 (prior 1:1) */ |
511 | if (ver < 1 || (ver == 1 && rev < 3)) | |
512 | yres = xres; | |
513 | else | |
514 | yres = (xres * 10)/16; | |
1da177e4 LT |
515 | break; |
516 | case 1: | |
517 | yres = (xres * 3)/4; | |
518 | break; | |
519 | case 2: | |
520 | yres = (xres * 4)/5; | |
521 | break; | |
522 | case 3: | |
523 | yres = (xres * 9)/16; | |
524 | break; | |
525 | } | |
526 | refresh = (block[1] & 0x3f) + 60; | |
527 | ||
528 | DPRINTK(" %dx%d@%dHz\n", xres, yres, refresh); | |
529 | for (i = 0; i < VESA_MODEDB_SIZE; i++) { | |
8c85fd89 | 530 | if (vesa_modes[i].xres == xres && |
1da177e4 LT |
531 | vesa_modes[i].yres == yres && |
532 | vesa_modes[i].refresh == refresh) { | |
533 | *mode = vesa_modes[i]; | |
534 | mode->flag |= FB_MODE_IS_STANDARD; | |
535 | return 1; | |
536 | } | |
537 | } | |
538 | calc_mode_timings(xres, yres, refresh, mode); | |
539 | return 1; | |
540 | } | |
541 | ||
542 | static int get_dst_timing(unsigned char *block, | |
43dcd13b | 543 | struct fb_videomode *mode, int ver, int rev) |
1da177e4 LT |
544 | { |
545 | int j, num = 0; | |
546 | ||
8c85fd89 | 547 | for (j = 0; j < 6; j++, block += STD_TIMING_DESCRIPTION_SIZE) |
43dcd13b | 548 | num += get_std_timing(block, &mode[num], ver, rev); |
1da177e4 LT |
549 | |
550 | return num; | |
551 | } | |
552 | ||
8c85fd89 | 553 | static void get_detailed_timing(unsigned char *block, |
1da177e4 LT |
554 | struct fb_videomode *mode) |
555 | { | |
556 | mode->xres = H_ACTIVE; | |
557 | mode->yres = V_ACTIVE; | |
558 | mode->pixclock = PIXEL_CLOCK; | |
559 | mode->pixclock /= 1000; | |
560 | mode->pixclock = KHZ2PICOS(mode->pixclock); | |
561 | mode->right_margin = H_SYNC_OFFSET; | |
562 | mode->left_margin = (H_ACTIVE + H_BLANKING) - | |
563 | (H_ACTIVE + H_SYNC_OFFSET + H_SYNC_WIDTH); | |
8c85fd89 | 564 | mode->upper_margin = V_BLANKING - V_SYNC_OFFSET - |
1da177e4 LT |
565 | V_SYNC_WIDTH; |
566 | mode->lower_margin = V_SYNC_OFFSET; | |
567 | mode->hsync_len = H_SYNC_WIDTH; | |
568 | mode->vsync_len = V_SYNC_WIDTH; | |
569 | if (HSYNC_POSITIVE) | |
570 | mode->sync |= FB_SYNC_HOR_HIGH_ACT; | |
571 | if (VSYNC_POSITIVE) | |
572 | mode->sync |= FB_SYNC_VERT_HIGH_ACT; | |
573 | mode->refresh = PIXEL_CLOCK/((H_ACTIVE + H_BLANKING) * | |
574 | (V_ACTIVE + V_BLANKING)); | |
1a3b09dc JD |
575 | if (INTERLACED) { |
576 | mode->yres *= 2; | |
577 | mode->upper_margin *= 2; | |
578 | mode->lower_margin *= 2; | |
579 | mode->vsync_len *= 2; | |
580 | mode->vmode |= FB_VMODE_INTERLACED; | |
581 | } | |
1da177e4 LT |
582 | mode->flag = FB_MODE_IS_DETAILED; |
583 | ||
584 | DPRINTK(" %d MHz ", PIXEL_CLOCK/1000000); | |
585 | DPRINTK("%d %d %d %d ", H_ACTIVE, H_ACTIVE + H_SYNC_OFFSET, | |
586 | H_ACTIVE + H_SYNC_OFFSET + H_SYNC_WIDTH, H_ACTIVE + H_BLANKING); | |
587 | DPRINTK("%d %d %d %d ", V_ACTIVE, V_ACTIVE + V_SYNC_OFFSET, | |
588 | V_ACTIVE + V_SYNC_OFFSET + V_SYNC_WIDTH, V_ACTIVE + V_BLANKING); | |
589 | DPRINTK("%sHSync %sVSync\n\n", (HSYNC_POSITIVE) ? "+" : "-", | |
590 | (VSYNC_POSITIVE) ? "+" : "-"); | |
591 | } | |
592 | ||
593 | /** | |
594 | * fb_create_modedb - create video mode database | |
595 | * @edid: EDID data | |
596 | * @dbsize: database size | |
597 | * | |
598 | * RETURNS: struct fb_videomode, @dbsize contains length of database | |
599 | * | |
600 | * DESCRIPTION: | |
601 | * This function builds a mode database using the contents of the EDID | |
602 | * data | |
603 | */ | |
604 | static struct fb_videomode *fb_create_modedb(unsigned char *edid, int *dbsize) | |
605 | { | |
606 | struct fb_videomode *mode, *m; | |
607 | unsigned char *block; | |
5a258d03 | 608 | int num = 0, i, first = 1; |
43dcd13b TV |
609 | int ver, rev; |
610 | ||
611 | ver = edid[EDID_STRUCT_VERSION]; | |
612 | rev = edid[EDID_STRUCT_REVISION]; | |
1da177e4 | 613 | |
def1eded | 614 | mode = kzalloc(50 * sizeof(struct fb_videomode), GFP_KERNEL); |
1da177e4 LT |
615 | if (mode == NULL) |
616 | return NULL; | |
1da177e4 | 617 | |
8c85fd89 | 618 | if (edid == NULL || !edid_checksum(edid) || |
1da177e4 LT |
619 | !edid_check_header(edid)) { |
620 | kfree(mode); | |
621 | return NULL; | |
622 | } | |
623 | ||
624 | *dbsize = 0; | |
625 | ||
1da177e4 LT |
626 | DPRINTK(" Detailed Timings\n"); |
627 | block = edid + DETAILED_TIMING_DESCRIPTIONS_START; | |
628 | for (i = 0; i < 4; i++, block+= DETAILED_TIMING_DESCRIPTION_SIZE) { | |
14c8102f | 629 | if (!(block[0] == 0x00 && block[1] == 0x00)) { |
1da177e4 LT |
630 | get_detailed_timing(block, &mode[num]); |
631 | if (first) { | |
632 | mode[num].flag |= FB_MODE_IS_FIRST; | |
633 | first = 0; | |
634 | } | |
635 | num++; | |
636 | } | |
637 | } | |
14c8102f AD |
638 | |
639 | DPRINTK(" Supported VESA Modes\n"); | |
640 | block = edid + ESTABLISHED_TIMING_1; | |
641 | num += get_est_timing(block, &mode[num]); | |
642 | ||
643 | DPRINTK(" Standard Timings\n"); | |
644 | block = edid + STD_TIMING_DESCRIPTIONS_START; | |
645 | for (i = 0; i < STD_TIMING; i++, block += STD_TIMING_DESCRIPTION_SIZE) | |
43dcd13b | 646 | num += get_std_timing(block, &mode[num], ver, rev); |
14c8102f AD |
647 | |
648 | block = edid + DETAILED_TIMING_DESCRIPTIONS_START; | |
649 | for (i = 0; i < 4; i++, block+= DETAILED_TIMING_DESCRIPTION_SIZE) { | |
650 | if (block[0] == 0x00 && block[1] == 0x00 && block[3] == 0xfa) | |
43dcd13b | 651 | num += get_dst_timing(block + 5, &mode[num], ver, rev); |
14c8102f | 652 | } |
8c85fd89 | 653 | |
1da177e4 LT |
654 | /* Yikes, EDID data is totally useless */ |
655 | if (!num) { | |
656 | kfree(mode); | |
657 | return NULL; | |
658 | } | |
659 | ||
660 | *dbsize = num; | |
661 | m = kmalloc(num * sizeof(struct fb_videomode), GFP_KERNEL); | |
662 | if (!m) | |
663 | return mode; | |
664 | memmove(m, mode, num * sizeof(struct fb_videomode)); | |
665 | kfree(mode); | |
666 | return m; | |
667 | } | |
668 | ||
669 | /** | |
670 | * fb_destroy_modedb - destroys mode database | |
671 | * @modedb: mode database to destroy | |
672 | * | |
673 | * DESCRIPTION: | |
674 | * Destroy mode database created by fb_create_modedb | |
675 | */ | |
676 | void fb_destroy_modedb(struct fb_videomode *modedb) | |
677 | { | |
678 | kfree(modedb); | |
679 | } | |
680 | ||
681 | static int fb_get_monitor_limits(unsigned char *edid, struct fb_monspecs *specs) | |
682 | { | |
683 | int i, retval = 1; | |
684 | unsigned char *block; | |
685 | ||
686 | block = edid + DETAILED_TIMING_DESCRIPTIONS_START; | |
687 | ||
688 | DPRINTK(" Monitor Operating Limits: "); | |
30076831 | 689 | |
1da177e4 LT |
690 | for (i = 0; i < 4; i++, block += DETAILED_TIMING_DESCRIPTION_SIZE) { |
691 | if (edid_is_limits_block(block)) { | |
692 | specs->hfmin = H_MIN_RATE * 1000; | |
693 | specs->hfmax = H_MAX_RATE * 1000; | |
694 | specs->vfmin = V_MIN_RATE; | |
695 | specs->vfmax = V_MAX_RATE; | |
696 | specs->dclkmax = MAX_PIXEL_CLOCK * 1000000; | |
697 | specs->gtf = (GTF_SUPPORT) ? 1 : 0; | |
698 | retval = 0; | |
699 | DPRINTK("From EDID\n"); | |
700 | break; | |
701 | } | |
702 | } | |
30076831 | 703 | |
1da177e4 LT |
704 | /* estimate monitor limits based on modes supported */ |
705 | if (retval) { | |
30076831 | 706 | struct fb_videomode *modes, *mode; |
cb85063a | 707 | int num_modes, hz, hscan, pixclock; |
30076831 | 708 | int vtotal, htotal; |
1da177e4 LT |
709 | |
710 | modes = fb_create_modedb(edid, &num_modes); | |
711 | if (!modes) { | |
712 | DPRINTK("None Available\n"); | |
713 | return 1; | |
714 | } | |
715 | ||
716 | retval = 0; | |
717 | for (i = 0; i < num_modes; i++) { | |
30076831 | 718 | mode = &modes[i]; |
1da177e4 | 719 | pixclock = PICOS2KHZ(modes[i].pixclock) * 1000; |
30076831 AD |
720 | htotal = mode->xres + mode->right_margin + mode->hsync_len |
721 | + mode->left_margin; | |
722 | vtotal = mode->yres + mode->lower_margin + mode->vsync_len | |
723 | + mode->upper_margin; | |
724 | ||
725 | if (mode->vmode & FB_VMODE_INTERLACED) | |
726 | vtotal /= 2; | |
727 | ||
728 | if (mode->vmode & FB_VMODE_DOUBLE) | |
729 | vtotal *= 2; | |
730 | ||
731 | hscan = (pixclock + htotal / 2) / htotal; | |
732 | hscan = (hscan + 500) / 1000 * 1000; | |
733 | hz = (hscan + vtotal / 2) / vtotal; | |
8c85fd89 | 734 | |
1da177e4 LT |
735 | if (specs->dclkmax == 0 || specs->dclkmax < pixclock) |
736 | specs->dclkmax = pixclock; | |
30076831 | 737 | |
1da177e4 LT |
738 | if (specs->dclkmin == 0 || specs->dclkmin > pixclock) |
739 | specs->dclkmin = pixclock; | |
30076831 | 740 | |
1da177e4 LT |
741 | if (specs->hfmax == 0 || specs->hfmax < hscan) |
742 | specs->hfmax = hscan; | |
30076831 | 743 | |
1da177e4 LT |
744 | if (specs->hfmin == 0 || specs->hfmin > hscan) |
745 | specs->hfmin = hscan; | |
30076831 | 746 | |
1da177e4 LT |
747 | if (specs->vfmax == 0 || specs->vfmax < hz) |
748 | specs->vfmax = hz; | |
30076831 | 749 | |
1da177e4 LT |
750 | if (specs->vfmin == 0 || specs->vfmin > hz) |
751 | specs->vfmin = hz; | |
752 | } | |
753 | DPRINTK("Extrapolated\n"); | |
754 | fb_destroy_modedb(modes); | |
755 | } | |
756 | DPRINTK(" H: %d-%dKHz V: %d-%dHz DCLK: %dMHz\n", | |
757 | specs->hfmin/1000, specs->hfmax/1000, specs->vfmin, | |
758 | specs->vfmax, specs->dclkmax/1000000); | |
759 | return retval; | |
760 | } | |
761 | ||
762 | static void get_monspecs(unsigned char *edid, struct fb_monspecs *specs) | |
763 | { | |
764 | unsigned char c, *block; | |
765 | ||
766 | block = edid + EDID_STRUCT_DISPLAY; | |
767 | ||
768 | fb_get_monitor_limits(edid, specs); | |
769 | ||
770 | c = block[0] & 0x80; | |
771 | specs->input = 0; | |
772 | if (c) { | |
773 | specs->input |= FB_DISP_DDI; | |
774 | DPRINTK(" Digital Display Input"); | |
775 | } else { | |
776 | DPRINTK(" Analog Display Input: Input Voltage - "); | |
777 | switch ((block[0] & 0x60) >> 5) { | |
778 | case 0: | |
779 | DPRINTK("0.700V/0.300V"); | |
780 | specs->input |= FB_DISP_ANA_700_300; | |
781 | break; | |
782 | case 1: | |
783 | DPRINTK("0.714V/0.286V"); | |
784 | specs->input |= FB_DISP_ANA_714_286; | |
785 | break; | |
786 | case 2: | |
787 | DPRINTK("1.000V/0.400V"); | |
788 | specs->input |= FB_DISP_ANA_1000_400; | |
789 | break; | |
790 | case 3: | |
791 | DPRINTK("0.700V/0.000V"); | |
792 | specs->input |= FB_DISP_ANA_700_000; | |
793 | break; | |
794 | } | |
795 | } | |
796 | DPRINTK("\n Sync: "); | |
797 | c = block[0] & 0x10; | |
798 | if (c) | |
799 | DPRINTK(" Configurable signal level\n"); | |
800 | c = block[0] & 0x0f; | |
801 | specs->signal = 0; | |
802 | if (c & 0x10) { | |
803 | DPRINTK("Blank to Blank "); | |
804 | specs->signal |= FB_SIGNAL_BLANK_BLANK; | |
805 | } | |
806 | if (c & 0x08) { | |
807 | DPRINTK("Separate "); | |
808 | specs->signal |= FB_SIGNAL_SEPARATE; | |
809 | } | |
810 | if (c & 0x04) { | |
811 | DPRINTK("Composite "); | |
812 | specs->signal |= FB_SIGNAL_COMPOSITE; | |
813 | } | |
814 | if (c & 0x02) { | |
815 | DPRINTK("Sync on Green "); | |
816 | specs->signal |= FB_SIGNAL_SYNC_ON_GREEN; | |
817 | } | |
818 | if (c & 0x01) { | |
819 | DPRINTK("Serration on "); | |
820 | specs->signal |= FB_SIGNAL_SERRATION_ON; | |
821 | } | |
822 | DPRINTK("\n"); | |
823 | specs->max_x = block[1]; | |
824 | specs->max_y = block[2]; | |
825 | DPRINTK(" Max H-size in cm: "); | |
826 | if (specs->max_x) | |
827 | DPRINTK("%d\n", specs->max_x); | |
828 | else | |
829 | DPRINTK("variable\n"); | |
830 | DPRINTK(" Max V-size in cm: "); | |
831 | if (specs->max_y) | |
832 | DPRINTK("%d\n", specs->max_y); | |
833 | else | |
834 | DPRINTK("variable\n"); | |
835 | ||
836 | c = block[3]; | |
837 | specs->gamma = c+100; | |
838 | DPRINTK(" Gamma: "); | |
839 | DPRINTK("%d.%d\n", specs->gamma/100, specs->gamma % 100); | |
840 | ||
841 | get_dpms_capabilities(block[4], specs); | |
842 | ||
843 | switch ((block[4] & 0x18) >> 3) { | |
844 | case 0: | |
845 | DPRINTK(" Monochrome/Grayscale\n"); | |
846 | specs->input |= FB_DISP_MONO; | |
847 | break; | |
848 | case 1: | |
849 | DPRINTK(" RGB Color Display\n"); | |
850 | specs->input |= FB_DISP_RGB; | |
851 | break; | |
852 | case 2: | |
853 | DPRINTK(" Non-RGB Multicolor Display\n"); | |
854 | specs->input |= FB_DISP_MULTI; | |
855 | break; | |
856 | default: | |
857 | DPRINTK(" Unknown\n"); | |
858 | specs->input |= FB_DISP_UNKNOWN; | |
859 | break; | |
860 | } | |
861 | ||
862 | get_chroma(block, specs); | |
863 | ||
864 | specs->misc = 0; | |
865 | c = block[4] & 0x7; | |
866 | if (c & 0x04) { | |
867 | DPRINTK(" Default color format is primary\n"); | |
868 | specs->misc |= FB_MISC_PRIM_COLOR; | |
869 | } | |
870 | if (c & 0x02) { | |
871 | DPRINTK(" First DETAILED Timing is preferred\n"); | |
872 | specs->misc |= FB_MISC_1ST_DETAIL; | |
873 | } | |
874 | if (c & 0x01) { | |
875 | printk(" Display is GTF capable\n"); | |
876 | specs->gtf = 1; | |
877 | } | |
878 | } | |
879 | ||
1da177e4 LT |
880 | int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var) |
881 | { | |
882 | int i; | |
883 | unsigned char *block; | |
884 | ||
885 | if (edid == NULL || var == NULL) | |
886 | return 1; | |
887 | ||
888 | if (!(edid_checksum(edid))) | |
889 | return 1; | |
890 | ||
891 | if (!(edid_check_header(edid))) | |
892 | return 1; | |
893 | ||
894 | block = edid + DETAILED_TIMING_DESCRIPTIONS_START; | |
895 | ||
896 | for (i = 0; i < 4; i++, block += DETAILED_TIMING_DESCRIPTION_SIZE) { | |
897 | if (edid_is_timing_block(block)) { | |
898 | var->xres = var->xres_virtual = H_ACTIVE; | |
899 | var->yres = var->yres_virtual = V_ACTIVE; | |
43a3abc6 | 900 | var->height = var->width = 0; |
1da177e4 LT |
901 | var->right_margin = H_SYNC_OFFSET; |
902 | var->left_margin = (H_ACTIVE + H_BLANKING) - | |
903 | (H_ACTIVE + H_SYNC_OFFSET + H_SYNC_WIDTH); | |
904 | var->upper_margin = V_BLANKING - V_SYNC_OFFSET - | |
905 | V_SYNC_WIDTH; | |
906 | var->lower_margin = V_SYNC_OFFSET; | |
907 | var->hsync_len = H_SYNC_WIDTH; | |
908 | var->vsync_len = V_SYNC_WIDTH; | |
909 | var->pixclock = PIXEL_CLOCK; | |
910 | var->pixclock /= 1000; | |
911 | var->pixclock = KHZ2PICOS(var->pixclock); | |
912 | ||
913 | if (HSYNC_POSITIVE) | |
914 | var->sync |= FB_SYNC_HOR_HIGH_ACT; | |
915 | if (VSYNC_POSITIVE) | |
916 | var->sync |= FB_SYNC_VERT_HIGH_ACT; | |
917 | return 0; | |
918 | } | |
919 | } | |
920 | return 1; | |
921 | } | |
922 | ||
923 | void fb_edid_to_monspecs(unsigned char *edid, struct fb_monspecs *specs) | |
924 | { | |
925 | unsigned char *block; | |
475666d4 | 926 | int i, found = 0; |
1da177e4 LT |
927 | |
928 | if (edid == NULL) | |
929 | return; | |
930 | ||
931 | if (!(edid_checksum(edid))) | |
932 | return; | |
933 | ||
934 | if (!(edid_check_header(edid))) | |
935 | return; | |
936 | ||
937 | memset(specs, 0, sizeof(struct fb_monspecs)); | |
938 | ||
939 | specs->version = edid[EDID_STRUCT_VERSION]; | |
940 | specs->revision = edid[EDID_STRUCT_REVISION]; | |
941 | ||
942 | DPRINTK("========================================\n"); | |
943 | DPRINTK("Display Information (EDID)\n"); | |
944 | DPRINTK("========================================\n"); | |
945 | DPRINTK(" EDID Version %d.%d\n", (int) specs->version, | |
946 | (int) specs->revision); | |
947 | ||
948 | parse_vendor_block(edid + ID_MANUFACTURER_NAME, specs); | |
949 | ||
950 | block = edid + DETAILED_TIMING_DESCRIPTIONS_START; | |
951 | for (i = 0; i < 4; i++, block += DETAILED_TIMING_DESCRIPTION_SIZE) { | |
952 | if (edid_is_serial_block(block)) { | |
953 | copy_string(block, specs->serial_no); | |
954 | DPRINTK(" Serial Number: %s\n", specs->serial_no); | |
955 | } else if (edid_is_ascii_block(block)) { | |
956 | copy_string(block, specs->ascii); | |
957 | DPRINTK(" ASCII Block: %s\n", specs->ascii); | |
958 | } else if (edid_is_monitor_block(block)) { | |
959 | copy_string(block, specs->monitor); | |
960 | DPRINTK(" Monitor Name: %s\n", specs->monitor); | |
961 | } | |
962 | } | |
963 | ||
964 | DPRINTK(" Display Characteristics:\n"); | |
965 | get_monspecs(edid, specs); | |
966 | ||
967 | specs->modedb = fb_create_modedb(edid, &specs->modedb_len); | |
475666d4 AD |
968 | |
969 | /* | |
970 | * Workaround for buggy EDIDs that sets that the first | |
971 | * detailed timing is preferred but has not detailed | |
972 | * timing specified | |
973 | */ | |
974 | for (i = 0; i < specs->modedb_len; i++) { | |
975 | if (specs->modedb[i].flag & FB_MODE_IS_DETAILED) { | |
976 | found = 1; | |
977 | break; | |
978 | } | |
979 | } | |
980 | ||
981 | if (!found) | |
982 | specs->misc &= ~FB_MISC_1ST_DETAIL; | |
983 | ||
1da177e4 LT |
984 | DPRINTK("========================================\n"); |
985 | } | |
986 | ||
e4105119 GL |
987 | /** |
988 | * fb_edid_add_monspecs() - add monitor video modes from E-EDID data | |
989 | * @edid: 128 byte array with an E-EDID block | |
990 | * @spacs: monitor specs to be extended | |
991 | */ | |
9fbbdde9 EG |
992 | void fb_edid_add_monspecs(unsigned char *edid, struct fb_monspecs *specs) |
993 | { | |
994 | unsigned char *block; | |
e4105119 GL |
995 | struct fb_videomode *m; |
996 | int num = 0, i; | |
0ad83f68 GL |
997 | u8 svd[64], edt[(128 - 4) / DETAILED_TIMING_DESCRIPTION_SIZE]; |
998 | u8 pos = 4, svd_n = 0; | |
9fbbdde9 | 999 | |
e4105119 | 1000 | if (!edid) |
9fbbdde9 EG |
1001 | return; |
1002 | ||
1003 | if (!edid_checksum(edid)) | |
1004 | return; | |
1005 | ||
e4105119 GL |
1006 | if (edid[0] != 0x2 || |
1007 | edid[2] < 4 || edid[2] > 128 - DETAILED_TIMING_DESCRIPTION_SIZE) | |
9fbbdde9 EG |
1008 | return; |
1009 | ||
0ad83f68 GL |
1010 | DPRINTK(" Short Video Descriptors\n"); |
1011 | ||
1012 | while (pos < edid[2]) { | |
1013 | u8 len = edid[pos] & 0x1f, type = (edid[pos] >> 5) & 7; | |
1014 | pr_debug("Data block %u of %u bytes\n", type, len); | |
1015 | if (type == 2) | |
1016 | for (i = pos; i < pos + len; i++) { | |
1017 | u8 idx = edid[pos + i] & 0x7f; | |
1018 | svd[svd_n++] = idx; | |
1019 | pr_debug("N%sative mode #%d\n", | |
1020 | edid[pos + i] & 0x80 ? "" : "on-n", idx); | |
1021 | } | |
1022 | pos += len + 1; | |
1023 | } | |
1024 | ||
e4105119 | 1025 | block = edid + edid[2]; |
9fbbdde9 EG |
1026 | |
1027 | DPRINTK(" Extended Detailed Timings\n"); | |
1028 | ||
e4105119 GL |
1029 | for (i = 0; i < (128 - edid[2]) / DETAILED_TIMING_DESCRIPTION_SIZE; |
1030 | i++, block += DETAILED_TIMING_DESCRIPTION_SIZE) | |
1031 | if (PIXEL_CLOCK) | |
1032 | edt[num++] = block - edid; | |
9fbbdde9 EG |
1033 | |
1034 | /* Yikes, EDID data is totally useless */ | |
0ad83f68 | 1035 | if (!(num + svd_n)) |
9fbbdde9 | 1036 | return; |
9fbbdde9 | 1037 | |
0ad83f68 | 1038 | m = kzalloc((specs->modedb_len + num + svd_n) * |
9fbbdde9 EG |
1039 | sizeof(struct fb_videomode), GFP_KERNEL); |
1040 | ||
e4105119 | 1041 | if (!m) |
9fbbdde9 | 1042 | return; |
e4105119 GL |
1043 | |
1044 | memcpy(m, specs->modedb, specs->modedb_len * sizeof(struct fb_videomode)); | |
1045 | ||
1046 | for (i = specs->modedb_len; i < specs->modedb_len + num; i++) { | |
1047 | get_detailed_timing(edid + edt[i - specs->modedb_len], &m[i]); | |
1048 | if (i == specs->modedb_len) | |
1049 | m[i].flag |= FB_MODE_IS_FIRST; | |
1050 | pr_debug("Adding %ux%u@%u\n", m[i].xres, m[i].yres, m[i].refresh); | |
9fbbdde9 EG |
1051 | } |
1052 | ||
0ad83f68 GL |
1053 | for (i = specs->modedb_len + num; i < specs->modedb_len + num + svd_n; i++) { |
1054 | int idx = svd[i - specs->modedb_len - num]; | |
1055 | if (!idx || idx > 63) { | |
1056 | pr_warning("Reserved SVD code %d\n", idx); | |
1057 | } else if (idx > ARRAY_SIZE(cea_modes) || !cea_modes[idx].xres) { | |
1058 | pr_warning("Unimplemented SVD code %d\n", idx); | |
1059 | } else { | |
1060 | memcpy(&m[i], cea_modes + idx, sizeof(m[i])); | |
1061 | pr_debug("Adding SVD #%d: %ux%u@%u\n", idx, | |
1062 | m[i].xres, m[i].yres, m[i].refresh); | |
1063 | } | |
1064 | } | |
1065 | ||
9fbbdde9 EG |
1066 | kfree(specs->modedb); |
1067 | specs->modedb = m; | |
0ad83f68 | 1068 | specs->modedb_len = specs->modedb_len + num + svd_n; |
9fbbdde9 EG |
1069 | } |
1070 | ||
8c85fd89 AH |
1071 | /* |
1072 | * VESA Generalized Timing Formula (GTF) | |
1da177e4 LT |
1073 | */ |
1074 | ||
1075 | #define FLYBACK 550 | |
1076 | #define V_FRONTPORCH 1 | |
1077 | #define H_OFFSET 40 | |
1078 | #define H_SCALEFACTOR 20 | |
1079 | #define H_BLANKSCALE 128 | |
1080 | #define H_GRADIENT 600 | |
1081 | #define C_VAL 30 | |
1082 | #define M_VAL 300 | |
1083 | ||
1084 | struct __fb_timings { | |
1085 | u32 dclk; | |
1086 | u32 hfreq; | |
1087 | u32 vfreq; | |
1088 | u32 hactive; | |
1089 | u32 vactive; | |
1090 | u32 hblank; | |
1091 | u32 vblank; | |
1092 | u32 htotal; | |
1093 | u32 vtotal; | |
1094 | }; | |
1095 | ||
1096 | /** | |
1097 | * fb_get_vblank - get vertical blank time | |
1098 | * @hfreq: horizontal freq | |
1099 | * | |
1100 | * DESCRIPTION: | |
8c85fd89 | 1101 | * vblank = right_margin + vsync_len + left_margin |
1da177e4 LT |
1102 | * |
1103 | * given: right_margin = 1 (V_FRONTPORCH) | |
1104 | * vsync_len = 3 | |
1105 | * flyback = 550 | |
1106 | * | |
1107 | * flyback * hfreq | |
1108 | * left_margin = --------------- - vsync_len | |
1109 | * 1000000 | |
1110 | */ | |
1111 | static u32 fb_get_vblank(u32 hfreq) | |
1112 | { | |
1113 | u32 vblank; | |
1114 | ||
8c85fd89 | 1115 | vblank = (hfreq * FLYBACK)/1000; |
1da177e4 LT |
1116 | vblank = (vblank + 500)/1000; |
1117 | return (vblank + V_FRONTPORCH); | |
1118 | } | |
1119 | ||
8c85fd89 | 1120 | /** |
1da177e4 LT |
1121 | * fb_get_hblank_by_freq - get horizontal blank time given hfreq |
1122 | * @hfreq: horizontal freq | |
1123 | * @xres: horizontal resolution in pixels | |
1124 | * | |
1125 | * DESCRIPTION: | |
1126 | * | |
1127 | * xres * duty_cycle | |
1128 | * hblank = ------------------ | |
1129 | * 100 - duty_cycle | |
1130 | * | |
1131 | * duty cycle = percent of htotal assigned to inactive display | |
1132 | * duty cycle = C - (M/Hfreq) | |
1133 | * | |
1134 | * where: C = ((offset - scale factor) * blank_scale) | |
1135 | * -------------------------------------- + scale factor | |
8c85fd89 | 1136 | * 256 |
1da177e4 LT |
1137 | * M = blank_scale * gradient |
1138 | * | |
1139 | */ | |
1140 | static u32 fb_get_hblank_by_hfreq(u32 hfreq, u32 xres) | |
1141 | { | |
1142 | u32 c_val, m_val, duty_cycle, hblank; | |
1143 | ||
8c85fd89 | 1144 | c_val = (((H_OFFSET - H_SCALEFACTOR) * H_BLANKSCALE)/256 + |
1da177e4 LT |
1145 | H_SCALEFACTOR) * 1000; |
1146 | m_val = (H_BLANKSCALE * H_GRADIENT)/256; | |
1147 | m_val = (m_val * 1000000)/hfreq; | |
1148 | duty_cycle = c_val - m_val; | |
1149 | hblank = (xres * duty_cycle)/(100000 - duty_cycle); | |
1150 | return (hblank); | |
1151 | } | |
1152 | ||
8c85fd89 | 1153 | /** |
1da177e4 LT |
1154 | * fb_get_hblank_by_dclk - get horizontal blank time given pixelclock |
1155 | * @dclk: pixelclock in Hz | |
1156 | * @xres: horizontal resolution in pixels | |
1157 | * | |
1158 | * DESCRIPTION: | |
1159 | * | |
1160 | * xres * duty_cycle | |
1161 | * hblank = ------------------ | |
1162 | * 100 - duty_cycle | |
1163 | * | |
1164 | * duty cycle = percent of htotal assigned to inactive display | |
1165 | * duty cycle = C - (M * h_period) | |
8c85fd89 | 1166 | * |
1da177e4 LT |
1167 | * where: h_period = SQRT(100 - C + (0.4 * xres * M)/dclk) + C - 100 |
1168 | * ----------------------------------------------- | |
1169 | * 2 * M | |
1170 | * M = 300; | |
1171 | * C = 30; | |
1172 | ||
1173 | */ | |
1174 | static u32 fb_get_hblank_by_dclk(u32 dclk, u32 xres) | |
1175 | { | |
1176 | u32 duty_cycle, h_period, hblank; | |
1177 | ||
1178 | dclk /= 1000; | |
1179 | h_period = 100 - C_VAL; | |
1180 | h_period *= h_period; | |
1181 | h_period += (M_VAL * xres * 2 * 1000)/(5 * dclk); | |
8c85fd89 | 1182 | h_period *= 10000; |
1da177e4 LT |
1183 | |
1184 | h_period = int_sqrt(h_period); | |
1185 | h_period -= (100 - C_VAL) * 100; | |
8c85fd89 | 1186 | h_period *= 1000; |
1da177e4 LT |
1187 | h_period /= 2 * M_VAL; |
1188 | ||
1189 | duty_cycle = C_VAL * 1000 - (M_VAL * h_period)/100; | |
1190 | hblank = (xres * duty_cycle)/(100000 - duty_cycle) + 8; | |
1191 | hblank &= ~15; | |
1192 | return (hblank); | |
1193 | } | |
8c85fd89 | 1194 | |
1da177e4 LT |
1195 | /** |
1196 | * fb_get_hfreq - estimate hsync | |
1197 | * @vfreq: vertical refresh rate | |
1198 | * @yres: vertical resolution | |
1199 | * | |
1200 | * DESCRIPTION: | |
1201 | * | |
1202 | * (yres + front_port) * vfreq * 1000000 | |
1203 | * hfreq = ------------------------------------- | |
1204 | * (1000000 - (vfreq * FLYBACK) | |
8c85fd89 | 1205 | * |
1da177e4 LT |
1206 | */ |
1207 | ||
1208 | static u32 fb_get_hfreq(u32 vfreq, u32 yres) | |
1209 | { | |
1210 | u32 divisor, hfreq; | |
8c85fd89 | 1211 | |
1da177e4 LT |
1212 | divisor = (1000000 - (vfreq * FLYBACK))/1000; |
1213 | hfreq = (yres + V_FRONTPORCH) * vfreq * 1000; | |
1214 | return (hfreq/divisor); | |
1215 | } | |
1216 | ||
1217 | static void fb_timings_vfreq(struct __fb_timings *timings) | |
1218 | { | |
1219 | timings->hfreq = fb_get_hfreq(timings->vfreq, timings->vactive); | |
1220 | timings->vblank = fb_get_vblank(timings->hfreq); | |
1221 | timings->vtotal = timings->vactive + timings->vblank; | |
8c85fd89 | 1222 | timings->hblank = fb_get_hblank_by_hfreq(timings->hfreq, |
1da177e4 LT |
1223 | timings->hactive); |
1224 | timings->htotal = timings->hactive + timings->hblank; | |
1225 | timings->dclk = timings->htotal * timings->hfreq; | |
1226 | } | |
1227 | ||
1228 | static void fb_timings_hfreq(struct __fb_timings *timings) | |
1229 | { | |
1230 | timings->vblank = fb_get_vblank(timings->hfreq); | |
1231 | timings->vtotal = timings->vactive + timings->vblank; | |
1232 | timings->vfreq = timings->hfreq/timings->vtotal; | |
8c85fd89 | 1233 | timings->hblank = fb_get_hblank_by_hfreq(timings->hfreq, |
1da177e4 LT |
1234 | timings->hactive); |
1235 | timings->htotal = timings->hactive + timings->hblank; | |
1236 | timings->dclk = timings->htotal * timings->hfreq; | |
1237 | } | |
1238 | ||
1239 | static void fb_timings_dclk(struct __fb_timings *timings) | |
1240 | { | |
8c85fd89 | 1241 | timings->hblank = fb_get_hblank_by_dclk(timings->dclk, |
1da177e4 LT |
1242 | timings->hactive); |
1243 | timings->htotal = timings->hactive + timings->hblank; | |
1244 | timings->hfreq = timings->dclk/timings->htotal; | |
1245 | timings->vblank = fb_get_vblank(timings->hfreq); | |
1246 | timings->vtotal = timings->vactive + timings->vblank; | |
1247 | timings->vfreq = timings->hfreq/timings->vtotal; | |
1248 | } | |
1249 | ||
1250 | /* | |
1251 | * fb_get_mode - calculates video mode using VESA GTF | |
1252 | * @flags: if: 0 - maximize vertical refresh rate | |
1253 | * 1 - vrefresh-driven calculation; | |
1254 | * 2 - hscan-driven calculation; | |
1255 | * 3 - pixelclock-driven calculation; | |
1256 | * @val: depending on @flags, ignored, vrefresh, hsync or pixelclock | |
1257 | * @var: pointer to fb_var_screeninfo | |
1258 | * @info: pointer to fb_info | |
1259 | * | |
1260 | * DESCRIPTION: | |
8c85fd89 AH |
1261 | * Calculates video mode based on monitor specs using VESA GTF. |
1262 | * The GTF is best for VESA GTF compliant monitors but is | |
1da177e4 LT |
1263 | * specifically formulated to work for older monitors as well. |
1264 | * | |
8c85fd89 | 1265 | * If @flag==0, the function will attempt to maximize the |
1da177e4 | 1266 | * refresh rate. Otherwise, it will calculate timings based on |
8c85fd89 | 1267 | * the flag and accompanying value. |
1da177e4 | 1268 | * |
8c85fd89 | 1269 | * If FB_IGNOREMON bit is set in @flags, monitor specs will be |
1da177e4 LT |
1270 | * ignored and @var will be filled with the calculated timings. |
1271 | * | |
1272 | * All calculations are based on the VESA GTF Spreadsheet | |
1273 | * available at VESA's public ftp (http://www.vesa.org). | |
8c85fd89 | 1274 | * |
1da177e4 LT |
1275 | * NOTES: |
1276 | * The timings generated by the GTF will be different from VESA | |
1277 | * DMT. It might be a good idea to keep a table of standard | |
1278 | * VESA modes as well. The GTF may also not work for some displays, | |
1279 | * such as, and especially, analog TV. | |
8c85fd89 | 1280 | * |
1da177e4 LT |
1281 | * REQUIRES: |
1282 | * A valid info->monspecs, otherwise 'safe numbers' will be used. | |
8c85fd89 | 1283 | */ |
1da177e4 LT |
1284 | int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var, struct fb_info *info) |
1285 | { | |
af5d0f7e | 1286 | struct __fb_timings *timings; |
1da177e4 | 1287 | u32 interlace = 1, dscan = 1; |
af5d0f7e AD |
1288 | u32 hfmin, hfmax, vfmin, vfmax, dclkmin, dclkmax, err = 0; |
1289 | ||
1290 | ||
1291 | timings = kzalloc(sizeof(struct __fb_timings), GFP_KERNEL); | |
1292 | ||
1293 | if (!timings) | |
1294 | return -ENOMEM; | |
1da177e4 | 1295 | |
8c85fd89 | 1296 | /* |
1da177e4 LT |
1297 | * If monspecs are invalid, use values that are enough |
1298 | * for 640x480@60 | |
1299 | */ | |
af5d0f7e | 1300 | if (!info || !info->monspecs.hfmax || !info->monspecs.vfmax || |
1da177e4 LT |
1301 | !info->monspecs.dclkmax || |
1302 | info->monspecs.hfmax < info->monspecs.hfmin || | |
1303 | info->monspecs.vfmax < info->monspecs.vfmin || | |
1304 | info->monspecs.dclkmax < info->monspecs.dclkmin) { | |
1305 | hfmin = 29000; hfmax = 30000; | |
1306 | vfmin = 60; vfmax = 60; | |
1307 | dclkmin = 0; dclkmax = 25000000; | |
1308 | } else { | |
1309 | hfmin = info->monspecs.hfmin; | |
1310 | hfmax = info->monspecs.hfmax; | |
1311 | vfmin = info->monspecs.vfmin; | |
1312 | vfmax = info->monspecs.vfmax; | |
1313 | dclkmin = info->monspecs.dclkmin; | |
1314 | dclkmax = info->monspecs.dclkmax; | |
1315 | } | |
1316 | ||
af5d0f7e AD |
1317 | timings->hactive = var->xres; |
1318 | timings->vactive = var->yres; | |
8c85fd89 | 1319 | if (var->vmode & FB_VMODE_INTERLACED) { |
af5d0f7e | 1320 | timings->vactive /= 2; |
1da177e4 LT |
1321 | interlace = 2; |
1322 | } | |
1323 | if (var->vmode & FB_VMODE_DOUBLE) { | |
af5d0f7e | 1324 | timings->vactive *= 2; |
1da177e4 LT |
1325 | dscan = 2; |
1326 | } | |
1327 | ||
1328 | switch (flags & ~FB_IGNOREMON) { | |
1329 | case FB_MAXTIMINGS: /* maximize refresh rate */ | |
af5d0f7e AD |
1330 | timings->hfreq = hfmax; |
1331 | fb_timings_hfreq(timings); | |
1332 | if (timings->vfreq > vfmax) { | |
1333 | timings->vfreq = vfmax; | |
1334 | fb_timings_vfreq(timings); | |
1da177e4 | 1335 | } |
af5d0f7e AD |
1336 | if (timings->dclk > dclkmax) { |
1337 | timings->dclk = dclkmax; | |
1338 | fb_timings_dclk(timings); | |
1da177e4 LT |
1339 | } |
1340 | break; | |
1341 | case FB_VSYNCTIMINGS: /* vrefresh driven */ | |
af5d0f7e AD |
1342 | timings->vfreq = val; |
1343 | fb_timings_vfreq(timings); | |
1da177e4 LT |
1344 | break; |
1345 | case FB_HSYNCTIMINGS: /* hsync driven */ | |
af5d0f7e AD |
1346 | timings->hfreq = val; |
1347 | fb_timings_hfreq(timings); | |
1da177e4 LT |
1348 | break; |
1349 | case FB_DCLKTIMINGS: /* pixelclock driven */ | |
af5d0f7e AD |
1350 | timings->dclk = PICOS2KHZ(val) * 1000; |
1351 | fb_timings_dclk(timings); | |
1da177e4 LT |
1352 | break; |
1353 | default: | |
af5d0f7e | 1354 | err = -EINVAL; |
8c85fd89 AH |
1355 | |
1356 | } | |
1357 | ||
af5d0f7e AD |
1358 | if (err || (!(flags & FB_IGNOREMON) && |
1359 | (timings->vfreq < vfmin || timings->vfreq > vfmax || | |
1360 | timings->hfreq < hfmin || timings->hfreq > hfmax || | |
1361 | timings->dclk < dclkmin || timings->dclk > dclkmax))) { | |
1362 | err = -EINVAL; | |
1363 | } else { | |
1364 | var->pixclock = KHZ2PICOS(timings->dclk/1000); | |
1365 | var->hsync_len = (timings->htotal * 8)/100; | |
1366 | var->right_margin = (timings->hblank/2) - var->hsync_len; | |
1367 | var->left_margin = timings->hblank - var->right_margin - | |
1368 | var->hsync_len; | |
1369 | var->vsync_len = (3 * interlace)/dscan; | |
1370 | var->lower_margin = (1 * interlace)/dscan; | |
1371 | var->upper_margin = (timings->vblank * interlace)/dscan - | |
1372 | (var->vsync_len + var->lower_margin); | |
1373 | } | |
8c85fd89 | 1374 | |
af5d0f7e AD |
1375 | kfree(timings); |
1376 | return err; | |
1da177e4 | 1377 | } |
2db54c72 | 1378 | |
a38884f6 | 1379 | #ifdef CONFIG_VIDEOMODE_HELPERS |
2db54c72 ST |
1380 | int fb_videomode_from_videomode(const struct videomode *vm, |
1381 | struct fb_videomode *fbmode) | |
1382 | { | |
1383 | unsigned int htotal, vtotal; | |
1384 | ||
1385 | fbmode->xres = vm->hactive; | |
1386 | fbmode->left_margin = vm->hback_porch; | |
1387 | fbmode->right_margin = vm->hfront_porch; | |
1388 | fbmode->hsync_len = vm->hsync_len; | |
1389 | ||
1390 | fbmode->yres = vm->vactive; | |
1391 | fbmode->upper_margin = vm->vback_porch; | |
1392 | fbmode->lower_margin = vm->vfront_porch; | |
1393 | fbmode->vsync_len = vm->vsync_len; | |
1394 | ||
1395 | /* prevent division by zero in KHZ2PICOS macro */ | |
1396 | fbmode->pixclock = vm->pixelclock ? | |
1397 | KHZ2PICOS(vm->pixelclock / 1000) : 0; | |
1398 | ||
1399 | fbmode->sync = 0; | |
1400 | fbmode->vmode = 0; | |
06a33079 | 1401 | if (vm->flags & DISPLAY_FLAGS_HSYNC_HIGH) |
2db54c72 | 1402 | fbmode->sync |= FB_SYNC_HOR_HIGH_ACT; |
9bf9d47a | 1403 | if (vm->flags & DISPLAY_FLAGS_VSYNC_HIGH) |
2db54c72 | 1404 | fbmode->sync |= FB_SYNC_VERT_HIGH_ACT; |
06a33079 | 1405 | if (vm->flags & DISPLAY_FLAGS_INTERLACED) |
2db54c72 | 1406 | fbmode->vmode |= FB_VMODE_INTERLACED; |
06a33079 | 1407 | if (vm->flags & DISPLAY_FLAGS_DOUBLESCAN) |
2db54c72 ST |
1408 | fbmode->vmode |= FB_VMODE_DOUBLE; |
1409 | fbmode->flag = 0; | |
1410 | ||
1411 | htotal = vm->hactive + vm->hfront_porch + vm->hback_porch + | |
1412 | vm->hsync_len; | |
1413 | vtotal = vm->vactive + vm->vfront_porch + vm->vback_porch + | |
1414 | vm->vsync_len; | |
1415 | /* prevent division by zero */ | |
1416 | if (htotal && vtotal) { | |
1417 | fbmode->refresh = vm->pixelclock / (htotal * vtotal); | |
1418 | /* a mode must have htotal and vtotal != 0 or it is invalid */ | |
1419 | } else { | |
1420 | fbmode->refresh = 0; | |
1421 | return -EINVAL; | |
1422 | } | |
1423 | ||
1424 | return 0; | |
1425 | } | |
1426 | EXPORT_SYMBOL_GPL(fb_videomode_from_videomode); | |
2db54c72 | 1427 | |
a38884f6 | 1428 | #ifdef CONFIG_OF |
79089044 ST |
1429 | static inline void dump_fb_videomode(const struct fb_videomode *m) |
1430 | { | |
1431 | pr_debug("fb_videomode = %ux%u@%uHz (%ukHz) %u %u %u %u %u %u %u %u %u\n", | |
1432 | m->xres, m->yres, m->refresh, m->pixclock, m->left_margin, | |
1433 | m->right_margin, m->upper_margin, m->lower_margin, | |
1434 | m->hsync_len, m->vsync_len, m->sync, m->vmode, m->flag); | |
1435 | } | |
1436 | ||
1437 | /** | |
1438 | * of_get_fb_videomode - get a fb_videomode from devicetree | |
1439 | * @np: device_node with the timing specification | |
1440 | * @fb: will be set to the return value | |
1441 | * @index: index into the list of display timings in devicetree | |
1442 | * | |
1443 | * DESCRIPTION: | |
1444 | * This function is expensive and should only be used, if only one mode is to be | |
1445 | * read from DT. To get multiple modes start with of_get_display_timings ond | |
1446 | * work with that instead. | |
1447 | */ | |
1448 | int of_get_fb_videomode(struct device_node *np, struct fb_videomode *fb, | |
1449 | int index) | |
1450 | { | |
1451 | struct videomode vm; | |
1452 | int ret; | |
1453 | ||
1454 | ret = of_get_videomode(np, &vm, index); | |
1455 | if (ret) | |
1456 | return ret; | |
1457 | ||
1458 | fb_videomode_from_videomode(&vm, fb); | |
1459 | ||
1460 | pr_debug("%s: got %dx%d display mode from %s\n", | |
1461 | of_node_full_name(np), vm.hactive, vm.vactive, np->name); | |
1462 | dump_fb_videomode(fb); | |
1463 | ||
1464 | return 0; | |
1465 | } | |
1466 | EXPORT_SYMBOL_GPL(of_get_fb_videomode); | |
a38884f6 TV |
1467 | #endif /* CONFIG_OF */ |
1468 | #endif /* CONFIG_VIDEOMODE_HELPERS */ | |
79089044 | 1469 | |
1da177e4 LT |
1470 | #else |
1471 | int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var) | |
1472 | { | |
1473 | return 1; | |
1474 | } | |
1475 | void fb_edid_to_monspecs(unsigned char *edid, struct fb_monspecs *specs) | |
1476 | { | |
1477 | specs = NULL; | |
1478 | } | |
e4105119 GL |
1479 | void fb_edid_add_monspecs(unsigned char *edid, struct fb_monspecs *specs) |
1480 | { | |
1481 | } | |
1da177e4 LT |
1482 | void fb_destroy_modedb(struct fb_videomode *modedb) |
1483 | { | |
1484 | } | |
1485 | int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var, | |
1486 | struct fb_info *info) | |
1487 | { | |
1488 | return -EINVAL; | |
1489 | } | |
1490 | #endif /* CONFIG_FB_MODE_HELPERS */ | |
8c85fd89 | 1491 | |
1da177e4 LT |
1492 | /* |
1493 | * fb_validate_mode - validates var against monitor capabilities | |
1494 | * @var: pointer to fb_var_screeninfo | |
1495 | * @info: pointer to fb_info | |
1496 | * | |
1497 | * DESCRIPTION: | |
1498 | * Validates video mode against monitor capabilities specified in | |
1499 | * info->monspecs. | |
1500 | * | |
1501 | * REQUIRES: | |
1502 | * A valid info->monspecs. | |
1503 | */ | |
1504 | int fb_validate_mode(const struct fb_var_screeninfo *var, struct fb_info *info) | |
1505 | { | |
1506 | u32 hfreq, vfreq, htotal, vtotal, pixclock; | |
1507 | u32 hfmin, hfmax, vfmin, vfmax, dclkmin, dclkmax; | |
1508 | ||
8c85fd89 | 1509 | /* |
1da177e4 LT |
1510 | * If monspecs are invalid, use values that are enough |
1511 | * for 640x480@60 | |
1512 | */ | |
1513 | if (!info->monspecs.hfmax || !info->monspecs.vfmax || | |
1514 | !info->monspecs.dclkmax || | |
1515 | info->monspecs.hfmax < info->monspecs.hfmin || | |
1516 | info->monspecs.vfmax < info->monspecs.vfmin || | |
1517 | info->monspecs.dclkmax < info->monspecs.dclkmin) { | |
1518 | hfmin = 29000; hfmax = 30000; | |
1519 | vfmin = 60; vfmax = 60; | |
1520 | dclkmin = 0; dclkmax = 25000000; | |
1521 | } else { | |
1522 | hfmin = info->monspecs.hfmin; | |
1523 | hfmax = info->monspecs.hfmax; | |
1524 | vfmin = info->monspecs.vfmin; | |
1525 | vfmax = info->monspecs.vfmax; | |
1526 | dclkmin = info->monspecs.dclkmin; | |
1527 | dclkmax = info->monspecs.dclkmax; | |
1528 | } | |
1529 | ||
1530 | if (!var->pixclock) | |
1531 | return -EINVAL; | |
1532 | pixclock = PICOS2KHZ(var->pixclock) * 1000; | |
8c85fd89 AH |
1533 | |
1534 | htotal = var->xres + var->right_margin + var->hsync_len + | |
1da177e4 | 1535 | var->left_margin; |
8c85fd89 | 1536 | vtotal = var->yres + var->lower_margin + var->vsync_len + |
1da177e4 LT |
1537 | var->upper_margin; |
1538 | ||
1539 | if (var->vmode & FB_VMODE_INTERLACED) | |
1540 | vtotal /= 2; | |
1541 | if (var->vmode & FB_VMODE_DOUBLE) | |
1542 | vtotal *= 2; | |
1543 | ||
1544 | hfreq = pixclock/htotal; | |
0a793b77 JS |
1545 | hfreq = (hfreq + 500) / 1000 * 1000; |
1546 | ||
1da177e4 LT |
1547 | vfreq = hfreq/vtotal; |
1548 | ||
8c85fd89 | 1549 | return (vfreq < vfmin || vfreq > vfmax || |
1da177e4 LT |
1550 | hfreq < hfmin || hfreq > hfmax || |
1551 | pixclock < dclkmin || pixclock > dclkmax) ? | |
1552 | -EINVAL : 0; | |
1553 | } | |
1554 | ||
ba70710e | 1555 | #if defined(CONFIG_FIRMWARE_EDID) && defined(CONFIG_X86) |
5e518d76 AD |
1556 | |
1557 | /* | |
1558 | * We need to ensure that the EDID block is only returned for | |
1559 | * the primary graphics adapter. | |
1560 | */ | |
1561 | ||
1562 | const unsigned char *fb_firmware_edid(struct device *device) | |
1563 | { | |
1564 | struct pci_dev *dev = NULL; | |
1565 | struct resource *res = NULL; | |
1566 | unsigned char *edid = NULL; | |
1567 | ||
1568 | if (device) | |
1569 | dev = to_pci_dev(device); | |
1570 | ||
1571 | if (dev) | |
1572 | res = &dev->resource[PCI_ROM_RESOURCE]; | |
1573 | ||
1574 | if (res && res->flags & IORESOURCE_ROM_SHADOW) | |
1575 | edid = edid_info.dummy; | |
1576 | ||
1577 | return edid; | |
1578 | } | |
1579 | #else | |
1580 | const unsigned char *fb_firmware_edid(struct device *device) | |
1581 | { | |
1582 | return NULL; | |
1583 | } | |
59153f7d AD |
1584 | #endif |
1585 | EXPORT_SYMBOL(fb_firmware_edid); | |
5e518d76 | 1586 | |
1da177e4 LT |
1587 | EXPORT_SYMBOL(fb_parse_edid); |
1588 | EXPORT_SYMBOL(fb_edid_to_monspecs); | |
e4105119 | 1589 | EXPORT_SYMBOL(fb_edid_add_monspecs); |
1da177e4 LT |
1590 | EXPORT_SYMBOL(fb_get_mode); |
1591 | EXPORT_SYMBOL(fb_validate_mode); | |
1592 | EXPORT_SYMBOL(fb_destroy_modedb); |