1 | /* $NetBSD: edid.c,v 1.13 2014/11/17 00:46:04 jmcneill Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 2006 Itronix Inc. |
5 | * All rights reserved. |
6 | * |
7 | * Written by Garrett D'Amore for Itronix Inc. |
8 | * |
9 | * Redistribution and use in source and binary forms, with or without |
10 | * modification, are permitted provided that the following conditions |
11 | * are met: |
12 | * 1. Redistributions of source code must retain the above copyright |
13 | * notice, this list of conditions and the following disclaimer. |
14 | * 2. Redistributions in binary form must reproduce the above copyright |
15 | * notice, this list of conditions and the following disclaimer in the |
16 | * documentation and/or other materials provided with the distribution. |
17 | * 3. The name of Itronix Inc. may not be used to endorse |
18 | * or promote products derived from this software without specific |
19 | * prior written permission. |
20 | * |
21 | * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND ANY EXPRESS |
22 | * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
23 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY |
25 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE |
27 | * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
28 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
29 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
32 | */ |
33 | |
34 | #include <sys/cdefs.h> |
35 | __KERNEL_RCSID(0, "$NetBSD: edid.c,v 1.13 2014/11/17 00:46:04 jmcneill Exp $" ); |
36 | |
37 | #include <sys/param.h> |
38 | #include <sys/systm.h> |
39 | #include <sys/device.h> |
40 | #include <sys/kernel.h> |
41 | #include <sys/malloc.h> |
42 | #include <dev/videomode/videomode.h> |
43 | #include <dev/videomode/ediddevs.h> |
44 | #include <dev/videomode/edidreg.h> |
45 | #include <dev/videomode/edidvar.h> |
46 | #include <dev/videomode/vesagtf.h> |
47 | |
48 | #define EDIDVERBOSE 1 |
49 | #define DIVIDE(x,y) (((x) + ((y) / 2)) / (y)) |
50 | |
51 | /* These are reversed established timing order */ |
52 | static const char *_edid_modes[] = { |
53 | "1280x1024x75" , |
54 | "1024x768x75" , |
55 | "1024x768x70" , |
56 | "1024x768x60" , |
57 | "1024x768x87i" , |
58 | "832x624x74" , /* rounding error, 74.55 Hz aka "832x624x75" */ |
59 | "800x600x75" , |
60 | "800x600x72" , |
61 | "800x600x60" , |
62 | "800x600x56" , |
63 | "640x480x75" , |
64 | "640x480x72" , |
65 | "640x480x67" , |
66 | "640x480x60" , |
67 | "720x400x87" , /* rounding error, 87.85 Hz aka "720x400x88" */ |
68 | "720x400x70" , |
69 | }; |
70 | |
71 | #ifdef EDIDVERBOSE |
72 | struct edid_vendor { |
73 | const char *vendor; |
74 | const char *name; |
75 | }; |
76 | |
77 | struct edid_product { |
78 | const char *vendor; |
79 | uint16_t product; |
80 | const char *name; |
81 | }; |
82 | |
83 | #include <dev/videomode/ediddevs_data.h> |
84 | #endif /* EDIDVERBOSE */ |
85 | |
86 | static const char * |
87 | edid_findvendor(const char *vendor) |
88 | { |
89 | #ifdef EDIDVERBOSE |
90 | int n; |
91 | |
92 | for (n = 0; n < edid_nvendors; n++) |
93 | if (memcmp(edid_vendors[n].vendor, vendor, 3) == 0) |
94 | return edid_vendors[n].name; |
95 | #endif |
96 | return NULL; |
97 | } |
98 | |
99 | static const char * |
100 | edid_findproduct(const char *vendor, uint16_t product) |
101 | { |
102 | #ifdef EDIDVERBOSE |
103 | int n; |
104 | |
105 | for (n = 0; n < edid_nproducts; n++) |
106 | if (edid_products[n].product == product && |
107 | memcmp(edid_products[n].vendor, vendor, 3) == 0) |
108 | return edid_products[n].name; |
109 | #endif /* EDIDVERBOSE */ |
110 | return NULL; |
111 | |
112 | } |
113 | |
114 | static void |
115 | edid_strchomp(char *ptr) |
116 | { |
117 | for (;;) { |
118 | switch (*ptr) { |
119 | case '\0': |
120 | return; |
121 | case '\r': |
122 | case '\n': |
123 | *ptr = '\0'; |
124 | return; |
125 | } |
126 | ptr++; |
127 | } |
128 | } |
129 | |
130 | int |
131 | edid_is_valid(uint8_t *d) |
132 | { |
133 | int sum = 0, i; |
134 | uint8_t sig[8] = EDID_SIGNATURE; |
135 | |
136 | if (memcmp(d, sig, 8) != 0) |
137 | return EINVAL; |
138 | |
139 | for (i = 0; i < 128; i++) |
140 | sum += d[i]; |
141 | if ((sum & 0xff) != 0) |
142 | return EINVAL; |
143 | |
144 | return 0; |
145 | } |
146 | |
147 | void |
148 | edid_print(struct edid_info *edid) |
149 | { |
150 | int i; |
151 | |
152 | if (edid == NULL) |
153 | return; |
154 | printf("Vendor: [%s] %s\n" , edid->edid_vendor, edid->edid_vendorname); |
155 | printf("Product: [%04X] %s\n" , edid->edid_product, |
156 | edid->edid_productname); |
157 | printf("Serial number: %s\n" , edid->edid_serial); |
158 | printf("Manufactured %d Week %d\n" , |
159 | edid->edid_year, edid->edid_week); |
160 | printf("EDID Version %d.%d\n" , edid->edid_version, |
161 | edid->edid_revision); |
162 | printf("EDID Comment: %s\n" , edid->edid_comment); |
163 | |
164 | printf("Video Input: %x\n" , edid->edid_video_input); |
165 | if (edid->edid_video_input & EDID_VIDEO_INPUT_DIGITAL) { |
166 | printf("\tDigital" ); |
167 | if (edid->edid_video_input & EDID_VIDEO_INPUT_DFP1_COMPAT) |
168 | printf(" (DFP 1.x compatible)" ); |
169 | printf("\n" ); |
170 | } else { |
171 | printf("\tAnalog\n" ); |
172 | switch (EDID_VIDEO_INPUT_LEVEL(edid->edid_video_input)) { |
173 | case 0: |
174 | printf("\t-0.7, 0.3V\n" ); |
175 | break; |
176 | case 1: |
177 | printf("\t-0.714, 0.286V\n" ); |
178 | break; |
179 | case 2: |
180 | printf("\t-1.0, 0.4V\n" ); |
181 | break; |
182 | case 3: |
183 | printf("\t-0.7, 0.0V\n" ); |
184 | break; |
185 | } |
186 | if (edid->edid_video_input & EDID_VIDEO_INPUT_BLANK_TO_BLACK) |
187 | printf("\tBlank-to-black setup\n" ); |
188 | if (edid->edid_video_input & EDID_VIDEO_INPUT_SEPARATE_SYNCS) |
189 | printf("\tSeperate syncs\n" ); |
190 | if (edid->edid_video_input & EDID_VIDEO_INPUT_COMPOSITE_SYNC) |
191 | printf("\tComposite sync\n" ); |
192 | if (edid->edid_video_input & EDID_VIDEO_INPUT_SYNC_ON_GRN) |
193 | printf("\tSync on green\n" ); |
194 | if (edid->edid_video_input & EDID_VIDEO_INPUT_SERRATION) |
195 | printf("\tSerration vsync\n" ); |
196 | } |
197 | |
198 | printf("Gamma: %d.%02d\n" , |
199 | edid->edid_gamma / 100, edid->edid_gamma % 100); |
200 | |
201 | printf("Max Size: %d cm x %d cm\n" , |
202 | edid->edid_max_hsize, edid->edid_max_vsize); |
203 | |
204 | printf("Features: %x\n" , edid->edid_features); |
205 | if (edid->edid_features & EDID_FEATURES_STANDBY) |
206 | printf("\tDPMS standby\n" ); |
207 | if (edid->edid_features & EDID_FEATURES_SUSPEND) |
208 | printf("\tDPMS suspend\n" ); |
209 | if (edid->edid_features & EDID_FEATURES_ACTIVE_OFF) |
210 | printf("\tDPMS active-off\n" ); |
211 | switch (EDID_FEATURES_DISP_TYPE(edid->edid_features)) { |
212 | case EDID_FEATURES_DISP_TYPE_MONO: |
213 | printf("\tMonochrome\n" ); |
214 | break; |
215 | case EDID_FEATURES_DISP_TYPE_RGB: |
216 | printf("\tRGB\n" ); |
217 | break; |
218 | case EDID_FEATURES_DISP_TYPE_NON_RGB: |
219 | printf("\tMulticolor\n" ); |
220 | break; |
221 | case EDID_FEATURES_DISP_TYPE_UNDEFINED: |
222 | printf("\tUndefined monitor type\n" ); |
223 | break; |
224 | } |
225 | if (edid->edid_features & EDID_FEATURES_STD_COLOR) |
226 | printf("\tStandard color space\n" ); |
227 | if (edid->edid_features & EDID_FEATURES_PREFERRED_TIMING) |
228 | printf("\tPreferred timing\n" ); |
229 | if (edid->edid_features & EDID_FEATURES_DEFAULT_GTF) |
230 | printf("\tDefault GTF supported\n" ); |
231 | |
232 | printf("Chroma Info:\n" ); |
233 | printf("\tRed X: 0.%03d\n" , edid->edid_chroma.ec_redx); |
234 | printf("\tRed Y: 0.%03d\n" , edid->edid_chroma.ec_redy); |
235 | printf("\tGrn X: 0.%03d\n" , edid->edid_chroma.ec_greenx); |
236 | printf("\tGrn Y: 0.%03d\n" , edid->edid_chroma.ec_greeny); |
237 | printf("\tBlu X: 0.%03d\n" , edid->edid_chroma.ec_bluex); |
238 | printf("\tBlu Y: 0.%03d\n" , edid->edid_chroma.ec_bluey); |
239 | printf("\tWht X: 0.%03d\n" , edid->edid_chroma.ec_whitex); |
240 | printf("\tWht Y: 0.%03d\n" , edid->edid_chroma.ec_whitey); |
241 | |
242 | if (edid->edid_have_range) { |
243 | printf("Range:\n" ); |
244 | printf("\tHorizontal: %d - %d kHz\n" , |
245 | edid->edid_range.er_min_hfreq, |
246 | edid->edid_range.er_max_hfreq); |
247 | printf("\tVertical: %d - %d Hz\n" , |
248 | edid->edid_range.er_min_vfreq, |
249 | edid->edid_range.er_max_vfreq); |
250 | printf("\tMax Dot Clock: %d MHz\n" , |
251 | edid->edid_range.er_max_clock); |
252 | if (edid->edid_range.er_have_gtf2) { |
253 | printf("\tGTF2 hfreq: %d\n" , |
254 | edid->edid_range.er_gtf2_hfreq); |
255 | printf("\tGTF2 C: %d\n" , edid->edid_range.er_gtf2_c); |
256 | printf("\tGTF2 M: %d\n" , edid->edid_range.er_gtf2_m); |
257 | printf("\tGTF2 J: %d\n" , edid->edid_range.er_gtf2_j); |
258 | printf("\tGTF2 K: %d\n" , edid->edid_range.er_gtf2_k); |
259 | } |
260 | } |
261 | printf("Video modes:\n" ); |
262 | for (i = 0; i < edid->edid_nmodes; i++) { |
263 | printf("\t%dx%d @ %dHz" , |
264 | edid->edid_modes[i].hdisplay, |
265 | edid->edid_modes[i].vdisplay, |
266 | DIVIDE(DIVIDE(edid->edid_modes[i].dot_clock * 1000, |
267 | edid->edid_modes[i].htotal), edid->edid_modes[i].vtotal)); |
268 | printf(" (%d %d %d %d %d %d %d" , |
269 | edid->edid_modes[i].dot_clock, |
270 | edid->edid_modes[i].hsync_start, |
271 | edid->edid_modes[i].hsync_end, |
272 | edid->edid_modes[i].htotal, |
273 | edid->edid_modes[i].vsync_start, |
274 | edid->edid_modes[i].vsync_end, |
275 | edid->edid_modes[i].vtotal); |
276 | printf(" %s%sH %s%sV)\n" , |
277 | edid->edid_modes[i].flags & VID_PHSYNC ? "+" : "" , |
278 | edid->edid_modes[i].flags & VID_NHSYNC ? "-" : "" , |
279 | edid->edid_modes[i].flags & VID_PVSYNC ? "+" : "" , |
280 | edid->edid_modes[i].flags & VID_NVSYNC ? "-" : "" ); |
281 | } |
282 | if (edid->edid_preferred_mode) |
283 | printf("Preferred mode: %dx%d @ %dHz\n" , |
284 | edid->edid_preferred_mode->hdisplay, |
285 | edid->edid_preferred_mode->vdisplay, |
286 | DIVIDE(DIVIDE(edid->edid_preferred_mode->dot_clock * 1000, |
287 | edid->edid_preferred_mode->htotal), |
288 | edid->edid_preferred_mode->vtotal)); |
289 | |
290 | printf("Number of extension blocks: %d\n" , edid->edid_ext_block_count); |
291 | } |
292 | |
293 | static const struct videomode * |
294 | edid_mode_lookup_list(const char *name) |
295 | { |
296 | int i; |
297 | |
298 | for (i = 0; i < videomode_count; i++) |
299 | if (strcmp(name, videomode_list[i].name) == 0) |
300 | return &videomode_list[i]; |
301 | return NULL; |
302 | } |
303 | |
304 | static struct videomode * |
305 | edid_search_mode(struct edid_info *edid, const struct videomode *mode) |
306 | { |
307 | int refresh, i; |
308 | |
309 | refresh = DIVIDE(DIVIDE(mode->dot_clock * 1000, |
310 | mode->htotal), mode->vtotal); |
311 | for (i = 0; i < edid->edid_nmodes; i++) { |
312 | if (mode->hdisplay == edid->edid_modes[i].hdisplay && |
313 | mode->vdisplay == edid->edid_modes[i].vdisplay && |
314 | refresh == DIVIDE(DIVIDE( |
315 | edid->edid_modes[i].dot_clock * 1000, |
316 | edid->edid_modes[i].htotal), edid->edid_modes[i].vtotal)) { |
317 | return &edid->edid_modes[i]; |
318 | } |
319 | } |
320 | return NULL; |
321 | } |
322 | |
323 | static int |
324 | edid_std_timing(uint8_t *data, struct videomode *vmp) |
325 | { |
326 | unsigned x, y, f; |
327 | const struct videomode *lookup; |
328 | char name[80]; |
329 | |
330 | if ((data[0] == 1 && data[1] == 1) || |
331 | (data[0] == 0 && data[1] == 0) || |
332 | (data[0] == 0x20 && data[1] == 0x20)) |
333 | return 0; |
334 | |
335 | x = EDID_STD_TIMING_HRES(data); |
336 | switch (EDID_STD_TIMING_RATIO(data)) { |
337 | case EDID_STD_TIMING_RATIO_16_10: |
338 | y = x * 10 / 16; |
339 | break; |
340 | case EDID_STD_TIMING_RATIO_4_3: |
341 | y = x * 3 / 4; |
342 | break; |
343 | case EDID_STD_TIMING_RATIO_5_4: |
344 | y = x * 4 / 5; |
345 | break; |
346 | case EDID_STD_TIMING_RATIO_16_9: |
347 | default: |
348 | y = x * 9 / 16; |
349 | break; |
350 | } |
351 | f = EDID_STD_TIMING_VFREQ(data); |
352 | |
353 | /* first try to lookup the mode as a DMT timing */ |
354 | snprintf(name, sizeof(name), "%dx%dx%d" , x, y, f); |
355 | if ((lookup = edid_mode_lookup_list(name)) != NULL) { |
356 | *vmp = *lookup; |
357 | } else { |
358 | /* failing that, calculate it using gtf */ |
359 | /* |
360 | * Hmm. I'm not using alternate GTF timings, which |
361 | * could, in theory, be present. |
362 | */ |
363 | vesagtf_mode(x, y, f, vmp); |
364 | } |
365 | return 1; |
366 | } |
367 | |
368 | static int |
369 | edid_det_timing(uint8_t *data, struct videomode *vmp) |
370 | { |
371 | unsigned hactive, hblank, hsyncwid, hsyncoff; |
372 | unsigned vactive, vblank, vsyncwid, vsyncoff; |
373 | uint8_t flags; |
374 | |
375 | flags = EDID_DET_TIMING_FLAGS(data); |
376 | |
377 | /* we don't support stereo modes (for now) */ |
378 | if (flags & (EDID_DET_TIMING_FLAG_STEREO | |
379 | EDID_DET_TIMING_FLAG_STEREO_MODE)) |
380 | return 0; |
381 | |
382 | vmp->dot_clock = EDID_DET_TIMING_DOT_CLOCK(data) / 1000; |
383 | |
384 | hactive = EDID_DET_TIMING_HACTIVE(data); |
385 | hblank = EDID_DET_TIMING_HBLANK(data); |
386 | hsyncwid = EDID_DET_TIMING_HSYNC_WIDTH(data); |
387 | hsyncoff = EDID_DET_TIMING_HSYNC_OFFSET(data); |
388 | |
389 | vactive = EDID_DET_TIMING_VACTIVE(data); |
390 | vblank = EDID_DET_TIMING_VBLANK(data); |
391 | vsyncwid = EDID_DET_TIMING_VSYNC_WIDTH(data); |
392 | vsyncoff = EDID_DET_TIMING_VSYNC_OFFSET(data); |
393 | |
394 | /* Borders are contained within the blank areas. */ |
395 | |
396 | vmp->hdisplay = hactive; |
397 | vmp->htotal = hactive + hblank; |
398 | vmp->hsync_start = hactive + hsyncoff; |
399 | vmp->hsync_end = vmp->hsync_start + hsyncwid; |
400 | |
401 | vmp->vdisplay = vactive; |
402 | vmp->vtotal = vactive + vblank; |
403 | vmp->vsync_start = vactive + vsyncoff; |
404 | vmp->vsync_end = vmp->vsync_start + vsyncwid; |
405 | |
406 | vmp->flags = 0; |
407 | |
408 | if (flags & EDID_DET_TIMING_FLAG_INTERLACE) |
409 | vmp->flags |= VID_INTERLACE; |
410 | if (flags & EDID_DET_TIMING_FLAG_HSYNC_POSITIVE) |
411 | vmp->flags |= VID_PHSYNC; |
412 | else |
413 | vmp->flags |= VID_NHSYNC; |
414 | |
415 | if (flags & EDID_DET_TIMING_FLAG_VSYNC_POSITIVE) |
416 | vmp->flags |= VID_PVSYNC; |
417 | else |
418 | vmp->flags |= VID_NVSYNC; |
419 | |
420 | return 1; |
421 | } |
422 | |
423 | static void |
424 | edid_block(struct edid_info *edid, uint8_t *data) |
425 | { |
426 | int i; |
427 | struct videomode mode, *exist_mode; |
428 | |
429 | if (EDID_BLOCK_IS_DET_TIMING(data)) { |
430 | if (!edid_det_timing(data, &mode)) |
431 | return; |
432 | /* Does this mode already exist? */ |
433 | exist_mode = edid_search_mode(edid, &mode); |
434 | if (exist_mode != NULL) { |
435 | *exist_mode = mode; |
436 | if (edid->edid_preferred_mode == NULL) |
437 | edid->edid_preferred_mode = exist_mode; |
438 | } else { |
439 | edid->edid_modes[edid->edid_nmodes] = mode; |
440 | if (edid->edid_preferred_mode == NULL) |
441 | edid->edid_preferred_mode = |
442 | &edid->edid_modes[edid->edid_nmodes]; |
443 | edid->edid_nmodes++; |
444 | } |
445 | return; |
446 | } |
447 | |
448 | switch (EDID_BLOCK_TYPE(data)) { |
449 | case EDID_DESC_BLOCK_TYPE_SERIAL: |
450 | memcpy(edid->edid_serial, data + EDID_DESC_ASCII_DATA_OFFSET, |
451 | EDID_DESC_ASCII_DATA_LEN); |
452 | edid->edid_serial[sizeof(edid->edid_serial) - 1] = 0; |
453 | break; |
454 | |
455 | case EDID_DESC_BLOCK_TYPE_ASCII: |
456 | memcpy(edid->edid_comment, data + EDID_DESC_ASCII_DATA_OFFSET, |
457 | EDID_DESC_ASCII_DATA_LEN); |
458 | edid->edid_comment[sizeof(edid->edid_comment) - 1] = 0; |
459 | break; |
460 | |
461 | case EDID_DESC_BLOCK_TYPE_RANGE: |
462 | edid->edid_have_range = 1; |
463 | edid->edid_range.er_min_vfreq = EDID_DESC_RANGE_MIN_VFREQ(data); |
464 | edid->edid_range.er_max_vfreq = EDID_DESC_RANGE_MAX_VFREQ(data); |
465 | edid->edid_range.er_min_hfreq = EDID_DESC_RANGE_MIN_HFREQ(data); |
466 | edid->edid_range.er_max_hfreq = EDID_DESC_RANGE_MAX_HFREQ(data); |
467 | edid->edid_range.er_max_clock = EDID_DESC_RANGE_MAX_CLOCK(data); |
468 | if (!EDID_DESC_RANGE_HAVE_GTF2(data)) |
469 | break; |
470 | edid->edid_range.er_have_gtf2 = 1; |
471 | edid->edid_range.er_gtf2_hfreq = |
472 | EDID_DESC_RANGE_GTF2_HFREQ(data); |
473 | edid->edid_range.er_gtf2_c = EDID_DESC_RANGE_GTF2_C(data); |
474 | edid->edid_range.er_gtf2_m = EDID_DESC_RANGE_GTF2_M(data); |
475 | edid->edid_range.er_gtf2_j = EDID_DESC_RANGE_GTF2_J(data); |
476 | edid->edid_range.er_gtf2_k = EDID_DESC_RANGE_GTF2_K(data); |
477 | break; |
478 | |
479 | case EDID_DESC_BLOCK_TYPE_NAME: |
480 | /* copy the product name into place */ |
481 | memcpy(edid->edid_productname, |
482 | data + EDID_DESC_ASCII_DATA_OFFSET, |
483 | EDID_DESC_ASCII_DATA_LEN); |
484 | break; |
485 | |
486 | case EDID_DESC_BLOCK_TYPE_STD_TIMING: |
487 | data += EDID_DESC_STD_TIMING_START; |
488 | for (i = 0; i < EDID_DESC_STD_TIMING_COUNT; i++) { |
489 | if (edid_std_timing(data, &mode)) { |
490 | /* Does this mode already exist? */ |
491 | exist_mode = edid_search_mode(edid, &mode); |
492 | if (exist_mode == NULL) { |
493 | edid->edid_modes[edid->edid_nmodes] = |
494 | mode; |
495 | edid->edid_nmodes++; |
496 | } |
497 | } |
498 | data += 2; |
499 | } |
500 | break; |
501 | |
502 | case EDID_DESC_BLOCK_TYPE_COLOR_POINT: |
503 | /* XXX: not implemented yet */ |
504 | break; |
505 | } |
506 | } |
507 | |
508 | /* |
509 | * Gets EDID version in BCD, e.g. EDID v1.3 returned as 0x0103 |
510 | */ |
511 | int |
512 | edid_parse(uint8_t *data, struct edid_info *edid) |
513 | { |
514 | uint16_t manfid, estmodes; |
515 | const struct videomode *vmp; |
516 | int i; |
517 | const char *name; |
518 | int max_dotclock = 0; |
519 | int mhz; |
520 | |
521 | if (edid_is_valid(data) != 0) |
522 | return -1; |
523 | |
524 | /* get product identification */ |
525 | manfid = EDID_VENDOR_ID(data); |
526 | edid->edid_vendor[0] = EDID_MANFID_0(manfid); |
527 | edid->edid_vendor[1] = EDID_MANFID_1(manfid); |
528 | edid->edid_vendor[2] = EDID_MANFID_2(manfid); |
529 | edid->edid_vendor[3] = 0; /* null terminate for convenience */ |
530 | |
531 | edid->edid_product = data[EDID_OFFSET_PRODUCT_ID] + |
532 | (data[EDID_OFFSET_PRODUCT_ID + 1] << 8); |
533 | |
534 | name = edid_findvendor(edid->edid_vendor); |
535 | if (name != NULL) |
536 | strlcpy(edid->edid_vendorname, name, |
537 | sizeof(edid->edid_vendorname)); |
538 | else |
539 | edid->edid_vendorname[0] = '\0'; |
540 | |
541 | name = edid_findproduct(edid->edid_vendor, edid->edid_product); |
542 | if (name != NULL) |
543 | strlcpy(edid->edid_productname, name, |
544 | sizeof(edid->edid_productname)); |
545 | else |
546 | edid->edid_productname[0] = '\0'; |
547 | |
548 | snprintf(edid->edid_serial, sizeof(edid->edid_serial), "%08x" , |
549 | EDID_SERIAL_NUMBER(data)); |
550 | |
551 | edid->edid_week = EDID_WEEK(data); |
552 | edid->edid_year = EDID_YEAR(data); |
553 | |
554 | /* get edid revision */ |
555 | edid->edid_version = EDID_VERSION(data); |
556 | edid->edid_revision = EDID_REVISION(data); |
557 | |
558 | edid->edid_video_input = EDID_VIDEO_INPUT(data); |
559 | edid->edid_max_hsize = EDID_MAX_HSIZE(data); |
560 | edid->edid_max_vsize = EDID_MAX_VSIZE(data); |
561 | |
562 | edid->edid_gamma = EDID_GAMMA(data); |
563 | edid->edid_features = EDID_FEATURES(data); |
564 | |
565 | edid->edid_chroma.ec_redx = EDID_CHROMA_REDX(data); |
566 | edid->edid_chroma.ec_redy = EDID_CHROMA_REDX(data); |
567 | edid->edid_chroma.ec_greenx = EDID_CHROMA_GREENX(data); |
568 | edid->edid_chroma.ec_greeny = EDID_CHROMA_GREENY(data); |
569 | edid->edid_chroma.ec_bluex = EDID_CHROMA_BLUEX(data); |
570 | edid->edid_chroma.ec_bluey = EDID_CHROMA_BLUEY(data); |
571 | edid->edid_chroma.ec_whitex = EDID_CHROMA_WHITEX(data); |
572 | edid->edid_chroma.ec_whitey = EDID_CHROMA_WHITEY(data); |
573 | |
574 | edid->edid_ext_block_count = EDID_EXT_BLOCK_COUNT(data); |
575 | |
576 | /* lookup established modes */ |
577 | edid->edid_nmodes = 0; |
578 | edid->edid_preferred_mode = NULL; |
579 | estmodes = EDID_EST_TIMING(data); |
580 | /* Iterate in esztablished timing order */ |
581 | for (i = 15; i >= 0; i--) { |
582 | if (estmodes & (1 << i)) { |
583 | vmp = edid_mode_lookup_list(_edid_modes[i]); |
584 | if (vmp != NULL) { |
585 | edid->edid_modes[edid->edid_nmodes] = *vmp; |
586 | edid->edid_nmodes++; |
587 | } |
588 | #ifdef DIAGNOSTIC |
589 | else |
590 | printf("no data for est. mode %s\n" , |
591 | _edid_modes[i]); |
592 | #endif |
593 | } |
594 | } |
595 | |
596 | /* do standard timing section */ |
597 | for (i = 0; i < EDID_STD_TIMING_COUNT; i++) { |
598 | struct videomode mode, *exist_mode; |
599 | if (edid_std_timing(data + EDID_OFFSET_STD_TIMING + i * 2, |
600 | &mode)) { |
601 | /* Does this mode already exist? */ |
602 | exist_mode = edid_search_mode(edid, &mode); |
603 | if (exist_mode == NULL) { |
604 | edid->edid_modes[edid->edid_nmodes] = mode; |
605 | edid->edid_nmodes++; |
606 | } |
607 | } |
608 | } |
609 | |
610 | /* do detailed timings and descriptors */ |
611 | for (i = 0; i < EDID_BLOCK_COUNT; i++) { |
612 | edid_block(edid, data + EDID_OFFSET_DESC_BLOCK + |
613 | i * EDID_BLOCK_SIZE); |
614 | } |
615 | |
616 | edid_strchomp(edid->edid_vendorname); |
617 | edid_strchomp(edid->edid_productname); |
618 | edid_strchomp(edid->edid_serial); |
619 | edid_strchomp(edid->edid_comment); |
620 | |
621 | /* |
622 | * XXX |
623 | * some monitors lie about their maximum supported dot clock |
624 | * by claiming to support modes which need a higher dot clock |
625 | * than the stated maximum. |
626 | * For sanity's sake we bump it to the highest dot clock we find |
627 | * in the list of supported modes |
628 | */ |
629 | for (i = 0; i < edid->edid_nmodes; i++) |
630 | if (edid->edid_modes[i].dot_clock > max_dotclock) |
631 | max_dotclock = edid->edid_modes[i].dot_clock; |
632 | |
633 | aprint_debug("max_dotclock according to supported modes: %d\n" , |
634 | max_dotclock); |
635 | |
636 | mhz = (max_dotclock + 999) / 1000; |
637 | |
638 | if (edid->edid_have_range) { |
639 | if (mhz > edid->edid_range.er_max_clock) |
640 | edid->edid_range.er_max_clock = mhz; |
641 | } else |
642 | edid->edid_range.er_max_clock = mhz; |
643 | |
644 | return 0; |
645 | } |
646 | |
647 | |