| 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 | |