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