| 1 | |
| 2 | * linux/drivers/video/fbmon.c
|
| 3 | *
|
| 4 | * Copyright (C) 2002 James Simmons <[email protected]>
|
| 5 | *
|
| 6 | * Credits:
|
| 7 | *
|
| 8 | * The EDID Parser is a conglomeration from the following sources:
|
| 9 | *
|
| 10 | * 1. SciTech SNAP Graphics Architecture
|
| 11 | * Copyright (C) 1991-2002 SciTech Software, Inc. All rights reserved.
|
| 12 | *
|
| 13 | * 2. XFree86 4.3.0, interpret_edid.c
|
| 14 | * Copyright 1998 by Egbert Eich <[email protected]>
|
| 15 | *
|
| 16 | * 3. John Fremlin <[email protected]> and
|
| 17 | * Ani Joshi <[email protected]>
|
| 18 | *
|
| 19 | * Generalized Timing Formula is derived from:
|
| 20 | *
|
| 21 | * GTF Spreadsheet by Andy Morrish (1/5/97)
|
| 22 | * available at https://www.vesa.org
|
| 23 | *
|
| 24 | * This file is subject to the terms and conditions of the GNU General Public
|
| 25 | * License. See the file COPYING in the main directory of this archive
|
| 26 | * for more details.
|
| 27 | *
|
| 28 |
|
| 29 |
|
| 30 | #include <linux/export.h>
|
| 31 | #include <linux/fb.h>
|
| 32 | #include <linux/module.h>
|
| 33 | #include <linux/pci.h>
|
| 34 | #include <linux/slab.h>
|
| 35 | #include <linux/string_choices.h>
|
| 36 | #include <linux/sysfb.h>
|
| 37 |
|
| 38 | #include <video/of_videomode.h>
|
| 39 | #include <video/videomode.h>
|
| 40 |
|
| 41 | #include "../edid.h"
|
| 42 |
|
| 43 | |
| 44 | * EDID parser
|
| 45 |
|
| 46 |
|
| 47 | #undef DEBUG
|
| 48 |
|
| 49 | #ifdef DEBUG
|
| 50 | #define DPRINTK(fmt, args...) printk(fmt,## args)
|
| 51 | #else
|
| 52 | #define DPRINTK(fmt, args...) no_printk(fmt, ##args)
|
| 53 | #endif
|
| 54 |
|
| 55 | #define FBMON_FIX_HEADER 1
|
| 56 | #define FBMON_FIX_INPUT 2
|
| 57 | #define FBMON_FIX_TIMINGS 3
|
| 58 |
|
| 59 | #ifdef CONFIG_FB_MODE_HELPERS
|
| 60 | struct broken_edid {
|
| 61 | u8 manufacturer[4];
|
| 62 | u32 model;
|
| 63 | u32 fix;
|
| 64 | };
|
| 65 |
|
| 66 | static const struct broken_edid brokendb[] = {
|
| 67 |
|
| 68 | {
|
| 69 | .manufacturer = "DEC",
|
| 70 | .model = 0x073a,
|
| 71 | .fix = FBMON_FIX_HEADER,
|
| 72 | },
|
| 73 |
|
| 74 | {
|
| 75 | .manufacturer = "VSC",
|
| 76 | .model = 0x5a44,
|
| 77 | .fix = FBMON_FIX_INPUT,
|
| 78 | },
|
| 79 |
|
| 80 | {
|
| 81 | .manufacturer = "SHP",
|
| 82 | .model = 0x138e,
|
| 83 | .fix = FBMON_FIX_TIMINGS,
|
| 84 | },
|
| 85 | };
|
| 86 |
|
| 87 | static const unsigned char edid_v1_header[] = { 0x00, 0xff, 0xff, 0xff,
|
| 88 | 0xff, 0xff, 0xff, 0x00
|
| 89 | };
|
| 90 |
|
| 91 | static void copy_string(unsigned char *c, unsigned char *s)
|
| 92 | {
|
| 93 | int i;
|
| 94 | c = c + 5;
|
| 95 | for (i = 0; (i < 13 && *c != 0x0A); i++)
|
| 96 | *(s++) = *(c++);
|
| 97 | *s = 0;
|
| 98 | while (i-- && (*--s == 0x20)) *s = 0;
|
| 99 | }
|
| 100 |
|
| 101 | static int edid_is_serial_block(unsigned char *block)
|
| 102 | {
|
| 103 | if ((block[0] == 0x00) && (block[1] == 0x00) &&
|
| 104 | (block[2] == 0x00) && (block[3] == 0xff) &&
|
| 105 | (block[4] == 0x00))
|
| 106 | return 1;
|
| 107 | else
|
| 108 | return 0;
|
| 109 | }
|
| 110 |
|
| 111 | static int edid_is_ascii_block(unsigned char *block)
|
| 112 | {
|
| 113 | if ((block[0] == 0x00) && (block[1] == 0x00) &&
|
| 114 | (block[2] == 0x00) && (block[3] == 0xfe) &&
|
| 115 | (block[4] == 0x00))
|
| 116 | return 1;
|
| 117 | else
|
| 118 | return 0;
|
| 119 | }
|
| 120 |
|
| 121 | static int edid_is_limits_block(unsigned char *block)
|
| 122 | {
|
| 123 | if ((block[0] == 0x00) && (block[1] == 0x00) &&
|
| 124 | (block[2] == 0x00) && (block[3] == 0xfd) &&
|
| 125 | (block[4] == 0x00))
|
| 126 | return 1;
|
| 127 | else
|
| 128 | return 0;
|
| 129 | }
|
| 130 |
|
| 131 | static int edid_is_monitor_block(unsigned char *block)
|
| 132 | {
|
| 133 | if ((block[0] == 0x00) && (block[1] == 0x00) &&
|
| 134 | (block[2] == 0x00) && (block[3] == 0xfc) &&
|
| 135 | (block[4] == 0x00))
|
| 136 | return 1;
|
| 137 | else
|
| 138 | return 0;
|
| 139 | }
|
| 140 |
|
| 141 | static int edid_is_timing_block(unsigned char *block)
|
| 142 | {
|
| 143 | if ((block[0] != 0x00) || (block[1] != 0x00) ||
|
| 144 | (block[2] != 0x00) || (block[4] != 0x00))
|
| 145 | return 1;
|
| 146 | else
|
| 147 | return 0;
|
| 148 | }
|
| 149 |
|
| 150 | static int check_edid(unsigned char *edid)
|
| 151 | {
|
| 152 | unsigned char *block = edid + ID_MANUFACTURER_NAME, manufacturer[4];
|
| 153 | unsigned char *b;
|
| 154 | u32 model;
|
| 155 | int i, fix = 0, ret = 0;
|
| 156 |
|
| 157 | manufacturer[0] = ((block[0] & 0x7c) >> 2) + '@';
|
| 158 | manufacturer[1] = ((block[0] & 0x03) << 3) +
|
| 159 | ((block[1] & 0xe0) >> 5) + '@';
|
| 160 | manufacturer[2] = (block[1] & 0x1f) + '@';
|
| 161 | manufacturer[3] = 0;
|
| 162 | model = block[2] + (block[3] << 8);
|
| 163 |
|
| 164 | for (i = 0; i < ARRAY_SIZE(brokendb); i++) {
|
| 165 | if (!strncmp(manufacturer, brokendb[i].manufacturer, 4) &&
|
| 166 | brokendb[i].model == model) {
|
| 167 | fix = brokendb[i].fix;
|
| 168 | break;
|
| 169 | }
|
| 170 | }
|
| 171 |
|
| 172 | switch (fix) {
|
| 173 | case FBMON_FIX_HEADER:
|
| 174 | for (i = 0; i < 8; i++) {
|
| 175 | if (edid[i] != edid_v1_header[i]) {
|
| 176 | ret = fix;
|
| 177 | break;
|
| 178 | }
|
| 179 | }
|
| 180 | break;
|
| 181 | case FBMON_FIX_INPUT:
|
| 182 | b = edid + EDID_STRUCT_DISPLAY;
|
| 183 | |
| 184 | the input type be reset to analog
|
| 185 | if (b[4] & 0x01 && b[0] & 0x80)
|
| 186 | ret = fix;
|
| 187 | break;
|
| 188 | case FBMON_FIX_TIMINGS:
|
| 189 | b = edid + DETAILED_TIMING_DESCRIPTIONS_START;
|
| 190 | ret = fix;
|
| 191 |
|
| 192 | for (i = 0; i < 4; i++) {
|
| 193 | if (edid_is_limits_block(b)) {
|
| 194 | ret = 0;
|
| 195 | break;
|
| 196 | }
|
| 197 |
|
| 198 | b += DETAILED_TIMING_DESCRIPTION_SIZE;
|
| 199 | }
|
| 200 |
|
| 201 | break;
|
| 202 | }
|
| 203 |
|
| 204 | if (ret)
|
| 205 | printk("fbmon: The EDID Block of "
|
| 206 | "Manufacturer: %s Model: 0x%x is known to "
|
| 207 | "be broken,\n", manufacturer, model);
|
| 208 |
|
| 209 | return ret;
|
| 210 | }
|
| 211 |
|
| 212 | static void fix_edid(unsigned char *edid, int fix)
|
| 213 | {
|
| 214 | int i;
|
| 215 | unsigned char *b, csum = 0;
|
| 216 |
|
| 217 | switch (fix) {
|
| 218 | case FBMON_FIX_HEADER:
|
| 219 | printk("fbmon: trying a header reconstruct\n");
|
| 220 | memcpy(edid, edid_v1_header, 8);
|
| 221 | break;
|
| 222 | case FBMON_FIX_INPUT:
|
| 223 | printk("fbmon: trying to fix input type\n");
|
| 224 | b = edid + EDID_STRUCT_DISPLAY;
|
| 225 | b[0] &= ~0x80;
|
| 226 | edid[127] += 0x80;
|
| 227 | break;
|
| 228 | case FBMON_FIX_TIMINGS:
|
| 229 | printk("fbmon: trying to fix monitor timings\n");
|
| 230 | b = edid + DETAILED_TIMING_DESCRIPTIONS_START;
|
| 231 | for (i = 0; i < 4; i++) {
|
| 232 | if (!(edid_is_serial_block(b) ||
|
| 233 | edid_is_ascii_block(b) ||
|
| 234 | edid_is_monitor_block(b) ||
|
| 235 | edid_is_timing_block(b))) {
|
| 236 | b[0] = 0x00;
|
| 237 | b[1] = 0x00;
|
| 238 | b[2] = 0x00;
|
| 239 | b[3] = 0xfd;
|
| 240 | b[4] = 0x00;
|
| 241 | b[5] = 60;
|
| 242 | b[6] = 60;
|
| 243 | b[7] = 30;
|
| 244 | b[8] = 75;
|
| 245 | b[9] = 17;
|
| 246 | b[10] = 0;
|
| 247 | break;
|
| 248 | }
|
| 249 |
|
| 250 | b += DETAILED_TIMING_DESCRIPTION_SIZE;
|
| 251 | }
|
| 252 |
|
| 253 | for (i = 0; i < EDID_LENGTH - 1; i++)
|
| 254 | csum += edid[i];
|
| 255 |
|
| 256 | edid[127] = 256 - csum;
|
| 257 | break;
|
| 258 | }
|
| 259 | }
|
| 260 |
|
| 261 | static int edid_checksum(unsigned char *edid)
|
| 262 | {
|
| 263 | unsigned char csum = 0, all_null = 0;
|
| 264 | int i, err = 0, fix = check_edid(edid);
|
| 265 |
|
| 266 | if (fix)
|
| 267 | fix_edid(edid, fix);
|
| 268 |
|
| 269 | for (i = 0; i < EDID_LENGTH; i++) {
|
| 270 | csum += edid[i];
|
| 271 | all_null |= edid[i];
|
| 272 | }
|
| 273 |
|
| 274 | if (csum == 0x00 && all_null) {
|
| 275 |
|
| 276 | err = 1;
|
| 277 | }
|
| 278 |
|
| 279 | return err;
|
| 280 | }
|
| 281 |
|
| 282 | static int edid_check_header(unsigned char *edid)
|
| 283 | {
|
| 284 | int i, err = 1, fix = check_edid(edid);
|
| 285 |
|
| 286 | if (fix)
|
| 287 | fix_edid(edid, fix);
|
| 288 |
|
| 289 | for (i = 0; i < 8; i++) {
|
| 290 | if (edid[i] != edid_v1_header[i])
|
| 291 | err = 0;
|
| 292 | }
|
| 293 |
|
| 294 | return err;
|
| 295 | }
|
| 296 |
|
| 297 | static void parse_vendor_block(unsigned char *block, struct fb_monspecs *specs)
|
| 298 | {
|
| 299 | specs->manufacturer[0] = ((block[0] & 0x7c) >> 2) + '@';
|
| 300 | specs->manufacturer[1] = ((block[0] & 0x03) << 3) +
|
| 301 | ((block[1] & 0xe0) >> 5) + '@';
|
| 302 | specs->manufacturer[2] = (block[1] & 0x1f) + '@';
|
| 303 | specs->manufacturer[3] = 0;
|
| 304 | specs->model = block[2] + (block[3] << 8);
|
| 305 | specs->serial = block[4] + (block[5] << 8) +
|
| 306 | (block[6] << 16) + (block[7] << 24);
|
| 307 | specs->year = block[9] + 1990;
|
| 308 | specs->week = block[8];
|
| 309 | DPRINTK(" Manufacturer: %s\n", specs->manufacturer);
|
| 310 | DPRINTK(" Model: %x\n", specs->model);
|
| 311 | DPRINTK(" Serial#: %u\n", specs->serial);
|
| 312 | DPRINTK(" Year: %u Week %u\n", specs->year, specs->week);
|
| 313 | }
|
| 314 |
|
| 315 | static void get_dpms_capabilities(unsigned char flags,
|
| 316 | struct fb_monspecs *specs)
|
| 317 | {
|
| 318 | specs->dpms = 0;
|
| 319 | if (flags & DPMS_ACTIVE_OFF)
|
| 320 | specs->dpms |= FB_DPMS_ACTIVE_OFF;
|
| 321 | if (flags & DPMS_SUSPEND)
|
| 322 | specs->dpms |= FB_DPMS_SUSPEND;
|
| 323 | if (flags & DPMS_STANDBY)
|
| 324 | specs->dpms |= FB_DPMS_STANDBY;
|
| 325 | DPRINTK(" DPMS: Active %s, Suspend %s, Standby %s\n",
|
| 326 | str_yes_no(flags & DPMS_ACTIVE_OFF),
|
| 327 | str_yes_no(flags & DPMS_SUSPEND),
|
| 328 | str_yes_no(flags & DPMS_STANDBY));
|
| 329 | }
|
| 330 |
|
| 331 | static void get_chroma(unsigned char *block, struct fb_monspecs *specs)
|
| 332 | {
|
| 333 | int tmp;
|
| 334 |
|
| 335 | DPRINTK(" Chroma\n");
|
| 336 |
|
| 337 | tmp = ((block[5] & (3 << 6)) >> 6) | (block[0x7] << 2);
|
| 338 | tmp *= 1000;
|
| 339 | tmp += 512;
|
| 340 | specs->chroma.redx = tmp/1024;
|
| 341 | DPRINTK(" RedX: 0.%03d ", specs->chroma.redx);
|
| 342 |
|
| 343 | tmp = ((block[5] & (3 << 4)) >> 4) | (block[0x8] << 2);
|
| 344 | tmp *= 1000;
|
| 345 | tmp += 512;
|
| 346 | specs->chroma.redy = tmp/1024;
|
| 347 | DPRINTK("RedY: 0.%03d\n", specs->chroma.redy);
|
| 348 |
|
| 349 | tmp = ((block[5] & (3 << 2)) >> 2) | (block[0x9] << 2);
|
| 350 | tmp *= 1000;
|
| 351 | tmp += 512;
|
| 352 | specs->chroma.greenx = tmp/1024;
|
| 353 | DPRINTK(" GreenX: 0.%03d ", specs->chroma.greenx);
|
| 354 |
|
| 355 | tmp = (block[5] & 3) | (block[0xa] << 2);
|
| 356 | tmp *= 1000;
|
| 357 | tmp += 512;
|
| 358 | specs->chroma.greeny = tmp/1024;
|
| 359 | DPRINTK("GreenY: 0.%03d\n", specs->chroma.greeny);
|
| 360 |
|
| 361 | tmp = ((block[6] & (3 << 6)) >> 6) | (block[0xb] << 2);
|
| 362 | tmp *= 1000;
|
| 363 | tmp += 512;
|
| 364 | specs->chroma.bluex = tmp/1024;
|
| 365 | DPRINTK(" BlueX: 0.%03d ", specs->chroma.bluex);
|
| 366 |
|
| 367 | tmp = ((block[6] & (3 << 4)) >> 4) | (block[0xc] << 2);
|
| 368 | tmp *= 1000;
|
| 369 | tmp += 512;
|
| 370 | specs->chroma.bluey = tmp/1024;
|
| 371 | DPRINTK("BlueY: 0.%03d\n", specs->chroma.bluey);
|
| 372 |
|
| 373 | tmp = ((block[6] & (3 << 2)) >> 2) | (block[0xd] << 2);
|
| 374 | tmp *= 1000;
|
| 375 | tmp += 512;
|
| 376 | specs->chroma.whitex = tmp/1024;
|
| 377 | DPRINTK(" WhiteX: 0.%03d ", specs->chroma.whitex);
|
| 378 |
|
| 379 | tmp = (block[6] & 3) | (block[0xe] << 2);
|
| 380 | tmp *= 1000;
|
| 381 | tmp += 512;
|
| 382 | specs->chroma.whitey = tmp/1024;
|
| 383 | DPRINTK("WhiteY: 0.%03d\n", specs->chroma.whitey);
|
| 384 | }
|
| 385 |
|
| 386 | static void calc_mode_timings(int xres, int yres, int refresh,
|
| 387 | struct fb_videomode *mode)
|
| 388 | {
|
| 389 | struct fb_var_screeninfo *var;
|
| 390 |
|
| 391 | var = kzalloc_obj(struct fb_var_screeninfo);
|
| 392 |
|
| 393 | if (var) {
|
| 394 | var->xres = xres;
|
| 395 | var->yres = yres;
|
| 396 | fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON,
|
| 397 | refresh, var, NULL);
|
| 398 | mode->xres = xres;
|
| 399 | mode->yres = yres;
|
| 400 | mode->pixclock = var->pixclock;
|
| 401 | mode->refresh = refresh;
|
| 402 | mode->left_margin = var->left_margin;
|
| 403 | mode->right_margin = var->right_margin;
|
| 404 | mode->upper_margin = var->upper_margin;
|
| 405 | mode->lower_margin = var->lower_margin;
|
| 406 | mode->hsync_len = var->hsync_len;
|
| 407 | mode->vsync_len = var->vsync_len;
|
| 408 | mode->vmode = 0;
|
| 409 | mode->sync = 0;
|
| 410 | kfree(var);
|
| 411 | }
|
| 412 | }
|
| 413 |
|
| 414 | static int get_est_timing(unsigned char *block, struct fb_videomode *mode)
|
| 415 | {
|
| 416 | int num = 0;
|
| 417 | unsigned char c;
|
| 418 |
|
| 419 | c = block[0];
|
| 420 | if (c&0x80) {
|
| 421 | calc_mode_timings(720, 400, 70, &mode[num]);
|
| 422 | mode[num++].flag = FB_MODE_IS_CALCULATED;
|
| 423 | DPRINTK(" 720x400@70Hz\n");
|
| 424 | }
|
| 425 | if (c&0x40) {
|
| 426 | calc_mode_timings(720, 400, 88, &mode[num]);
|
| 427 | mode[num++].flag = FB_MODE_IS_CALCULATED;
|
| 428 | DPRINTK(" 720x400@88Hz\n");
|
| 429 | }
|
| 430 | if (c&0x20) {
|
| 431 | mode[num++] = vesa_modes[3];
|
| 432 | DPRINTK(" 640x480@60Hz\n");
|
| 433 | }
|
| 434 | if (c&0x10) {
|
| 435 | calc_mode_timings(640, 480, 67, &mode[num]);
|
| 436 | mode[num++].flag = FB_MODE_IS_CALCULATED;
|
| 437 | DPRINTK(" 640x480@67Hz\n");
|
| 438 | }
|
| 439 | if (c&0x08) {
|
| 440 | mode[num++] = vesa_modes[4];
|
| 441 | DPRINTK(" 640x480@72Hz\n");
|
| 442 | }
|
| 443 | if (c&0x04) {
|
| 444 | mode[num++] = vesa_modes[5];
|
| 445 | DPRINTK(" 640x480@75Hz\n");
|
| 446 | }
|
| 447 | if (c&0x02) {
|
| 448 | mode[num++] = vesa_modes[7];
|
| 449 | DPRINTK(" 800x600@56Hz\n");
|
| 450 | }
|
| 451 | if (c&0x01) {
|
| 452 | mode[num++] = vesa_modes[8];
|
| 453 | DPRINTK(" 800x600@60Hz\n");
|
| 454 | }
|
| 455 |
|
| 456 | c = block[1];
|
| 457 | if (c&0x80) {
|
| 458 | mode[num++] = vesa_modes[9];
|
| 459 | DPRINTK(" 800x600@72Hz\n");
|
| 460 | }
|
| 461 | if (c&0x40) {
|
| 462 | mode[num++] = vesa_modes[10];
|
| 463 | DPRINTK(" 800x600@75Hz\n");
|
| 464 | }
|
| 465 | if (c&0x20) {
|
| 466 | calc_mode_timings(832, 624, 75, &mode[num]);
|
| 467 | mode[num++].flag = FB_MODE_IS_CALCULATED;
|
| 468 | DPRINTK(" 832x624@75Hz\n");
|
| 469 | }
|
| 470 | if (c&0x10) {
|
| 471 | mode[num++] = vesa_modes[12];
|
| 472 | DPRINTK(" 1024x768@87Hz Interlaced\n");
|
| 473 | }
|
| 474 | if (c&0x08) {
|
| 475 | mode[num++] = vesa_modes[13];
|
| 476 | DPRINTK(" 1024x768@60Hz\n");
|
| 477 | }
|
| 478 | if (c&0x04) {
|
| 479 | mode[num++] = vesa_modes[14];
|
| 480 | DPRINTK(" 1024x768@70Hz\n");
|
| 481 | }
|
| 482 | if (c&0x02) {
|
| 483 | mode[num++] = vesa_modes[15];
|
| 484 | DPRINTK(" 1024x768@75Hz\n");
|
| 485 | }
|
| 486 | if (c&0x01) {
|
| 487 | mode[num++] = vesa_modes[21];
|
| 488 | DPRINTK(" 1280x1024@75Hz\n");
|
| 489 | }
|
| 490 | c = block[2];
|
| 491 | if (c&0x80) {
|
| 492 | mode[num++] = vesa_modes[17];
|
| 493 | DPRINTK(" 1152x870@75Hz\n");
|
| 494 | }
|
| 495 | DPRINTK(" Manufacturer's mask: %x\n",c&0x7F);
|
| 496 | return num;
|
| 497 | }
|
| 498 |
|
| 499 | static int get_std_timing(unsigned char *block, struct fb_videomode *mode,
|
| 500 | int ver, int rev, const struct fb_monspecs *specs)
|
| 501 | {
|
| 502 | int i;
|
| 503 |
|
| 504 | for (i = 0; i < DMT_SIZE; i++) {
|
| 505 | u32 std_2byte_code = block[0] << 8 | block[1];
|
| 506 | if (std_2byte_code == dmt_modes[i].std_2byte_code)
|
| 507 | break;
|
| 508 | }
|
| 509 |
|
| 510 | if (i < DMT_SIZE && dmt_modes[i].mode) {
|
| 511 |
|
| 512 | *mode = *dmt_modes[i].mode;
|
| 513 | mode->flag |= FB_MODE_IS_STANDARD;
|
| 514 | DPRINTK(" DMT id=%d\n", dmt_modes[i].dmt_id);
|
| 515 |
|
| 516 | } else {
|
| 517 | int xres, yres = 0, refresh, ratio;
|
| 518 |
|
| 519 | xres = (block[0] + 31) * 8;
|
| 520 | if (xres <= 256)
|
| 521 | return 0;
|
| 522 |
|
| 523 | ratio = (block[1] & 0xc0) >> 6;
|
| 524 | switch (ratio) {
|
| 525 | case 0:
|
| 526 |
|
| 527 | if (ver < 1 || (ver == 1 && rev < 3))
|
| 528 | yres = xres;
|
| 529 | else
|
| 530 | yres = (xres * 10)/16;
|
| 531 | break;
|
| 532 | case 1:
|
| 533 | yres = (xres * 3)/4;
|
| 534 | break;
|
| 535 | case 2:
|
| 536 | yres = (xres * 4)/5;
|
| 537 | break;
|
| 538 | case 3:
|
| 539 | yres = (xres * 9)/16;
|
| 540 | break;
|
| 541 | }
|
| 542 | refresh = (block[1] & 0x3f) + 60;
|
| 543 | DPRINTK(" %dx%d@%dHz\n", xres, yres, refresh);
|
| 544 |
|
| 545 | calc_mode_timings(xres, yres, refresh, mode);
|
| 546 | }
|
| 547 |
|
| 548 |
|
| 549 | if (specs && specs->dclkmax
|
| 550 | && PICOS2KHZ(mode->pixclock) * 1000 > specs->dclkmax) {
|
| 551 | DPRINTK(" mode exceed max DCLK\n");
|
| 552 | return 0;
|
| 553 | }
|
| 554 |
|
| 555 | return 1;
|
| 556 | }
|
| 557 |
|
| 558 | static int get_dst_timing(unsigned char *block, struct fb_videomode *mode,
|
| 559 | int ver, int rev, const struct fb_monspecs *specs)
|
| 560 | {
|
| 561 | int j, num = 0;
|
| 562 |
|
| 563 | for (j = 0; j < 6; j++, block += STD_TIMING_DESCRIPTION_SIZE)
|
| 564 | num += get_std_timing(block, &mode[num], ver, rev, specs);
|
| 565 |
|
| 566 | return num;
|
| 567 | }
|
| 568 |
|
| 569 | static void get_detailed_timing(unsigned char *block,
|
| 570 | struct fb_videomode *mode)
|
| 571 | {
|
| 572 | mode->xres = H_ACTIVE;
|
| 573 | mode->yres = V_ACTIVE;
|
| 574 | mode->pixclock = PIXEL_CLOCK;
|
| 575 | mode->pixclock /= 1000;
|
| 576 | mode->pixclock = KHZ2PICOS(mode->pixclock);
|
| 577 | mode->right_margin = H_SYNC_OFFSET;
|
| 578 | mode->left_margin = (H_ACTIVE + H_BLANKING) -
|
| 579 | (H_ACTIVE + H_SYNC_OFFSET + H_SYNC_WIDTH);
|
| 580 | mode->upper_margin = V_BLANKING - V_SYNC_OFFSET -
|
| 581 | V_SYNC_WIDTH;
|
| 582 | mode->lower_margin = V_SYNC_OFFSET;
|
| 583 | mode->hsync_len = H_SYNC_WIDTH;
|
| 584 | mode->vsync_len = V_SYNC_WIDTH;
|
| 585 | if (HSYNC_POSITIVE)
|
| 586 | mode->sync |= FB_SYNC_HOR_HIGH_ACT;
|
| 587 | if (VSYNC_POSITIVE)
|
| 588 | mode->sync |= FB_SYNC_VERT_HIGH_ACT;
|
| 589 | mode->refresh = PIXEL_CLOCK/((H_ACTIVE + H_BLANKING) *
|
| 590 | (V_ACTIVE + V_BLANKING));
|
| 591 | if (INTERLACED) {
|
| 592 | mode->yres *= 2;
|
| 593 | mode->upper_margin *= 2;
|
| 594 | mode->lower_margin *= 2;
|
| 595 | mode->vsync_len *= 2;
|
| 596 | mode->vmode |= FB_VMODE_INTERLACED;
|
| 597 | }
|
| 598 | mode->flag = FB_MODE_IS_DETAILED;
|
| 599 |
|
| 600 | DPRINTK(" %d MHz ", PIXEL_CLOCK/1000000);
|
| 601 | DPRINTK("%d %d %d %d ", H_ACTIVE, H_ACTIVE + H_SYNC_OFFSET,
|
| 602 | H_ACTIVE + H_SYNC_OFFSET + H_SYNC_WIDTH, H_ACTIVE + H_BLANKING);
|
| 603 | DPRINTK("%d %d %d %d ", V_ACTIVE, V_ACTIVE + V_SYNC_OFFSET,
|
| 604 | V_ACTIVE + V_SYNC_OFFSET + V_SYNC_WIDTH, V_ACTIVE + V_BLANKING);
|
| 605 | DPRINTK("%sHSync %sVSync\n\n", (HSYNC_POSITIVE) ? "+" : "-",
|
| 606 | (VSYNC_POSITIVE) ? "+" : "-");
|
| 607 | }
|
| 608 |
|
| 609 | |
| 610 | * fb_create_modedb - create video mode database
|
| 611 | * @edid: EDID data
|
| 612 | * @dbsize: database size
|
| 613 | * @specs: monitor specifications, may be NULL
|
| 614 | *
|
| 615 | * RETURNS: struct fb_videomode, @dbsize contains length of database
|
| 616 | *
|
| 617 | * DESCRIPTION:
|
| 618 | * This function builds a mode database using the contents of the EDID
|
| 619 | * data
|
| 620 |
|
| 621 | static struct fb_videomode *fb_create_modedb(unsigned char *edid, int *dbsize,
|
| 622 | const struct fb_monspecs *specs)
|
| 623 | {
|
| 624 | struct fb_videomode *mode, *m;
|
| 625 | unsigned char *block;
|
| 626 | int num = 0, i, first = 1;
|
| 627 | int ver, rev;
|
| 628 |
|
| 629 | mode = kzalloc_objs(struct fb_videomode, 50);
|
| 630 | if (mode == NULL)
|
| 631 | return NULL;
|
| 632 |
|
| 633 | if (edid == NULL || !edid_checksum(edid) ||
|
| 634 | !edid_check_header(edid)) {
|
| 635 | kfree(mode);
|
| 636 | return NULL;
|
| 637 | }
|
| 638 |
|
| 639 | ver = edid[EDID_STRUCT_VERSION];
|
| 640 | rev = edid[EDID_STRUCT_REVISION];
|
| 641 |
|
| 642 | *dbsize = 0;
|
| 643 |
|
| 644 | DPRINTK(" Detailed Timings\n");
|
| 645 | block = edid + DETAILED_TIMING_DESCRIPTIONS_START;
|
| 646 | for (i = 0; i < 4; i++, block+= DETAILED_TIMING_DESCRIPTION_SIZE) {
|
| 647 | if (!(block[0] == 0x00 && block[1] == 0x00)) {
|
| 648 | get_detailed_timing(block, &mode[num]);
|
| 649 | if (first) {
|
| 650 | mode[num].flag |= FB_MODE_IS_FIRST;
|
| 651 | first = 0;
|
| 652 | }
|
| 653 | num++;
|
| 654 | }
|
| 655 | }
|
| 656 |
|
| 657 | DPRINTK(" Supported VESA Modes\n");
|
| 658 | block = edid + ESTABLISHED_TIMING_1;
|
| 659 | num += get_est_timing(block, &mode[num]);
|
| 660 |
|
| 661 | DPRINTK(" Standard Timings\n");
|
| 662 | block = edid + STD_TIMING_DESCRIPTIONS_START;
|
| 663 | for (i = 0; i < STD_TIMING; i++, block += STD_TIMING_DESCRIPTION_SIZE)
|
| 664 | num += get_std_timing(block, &mode[num], ver, rev, specs);
|
| 665 |
|
| 666 | block = edid + DETAILED_TIMING_DESCRIPTIONS_START;
|
| 667 | for (i = 0; i < 4; i++, block+= DETAILED_TIMING_DESCRIPTION_SIZE) {
|
| 668 | if (block[0] == 0x00 && block[1] == 0x00 && block[3] == 0xfa)
|
| 669 | num += get_dst_timing(block + 5, &mode[num],
|
| 670 | ver, rev, specs);
|
| 671 | }
|
| 672 |
|
| 673 |
|
| 674 | if (!num) {
|
| 675 | kfree(mode);
|
| 676 | return NULL;
|
| 677 | }
|
| 678 |
|
| 679 | *dbsize = num;
|
| 680 | m = kmalloc_objs(struct fb_videomode, num);
|
| 681 | if (!m)
|
| 682 | return mode;
|
| 683 | memmove(m, mode, num * sizeof(struct fb_videomode));
|
| 684 | kfree(mode);
|
| 685 | return m;
|
| 686 | }
|
| 687 |
|
| 688 | |
| 689 | * fb_destroy_modedb - destroys mode database
|
| 690 | * @modedb: mode database to destroy
|
| 691 | *
|
| 692 | * DESCRIPTION:
|
| 693 | * Destroy mode database created by fb_create_modedb
|
| 694 |
|
| 695 | void fb_destroy_modedb(struct fb_videomode *modedb)
|
| 696 | {
|
| 697 | kfree(modedb);
|
| 698 | }
|
| 699 |
|
| 700 | static int fb_get_monitor_limits(unsigned char *edid, struct fb_monspecs *specs)
|
| 701 | {
|
| 702 | int i, retval = 1;
|
| 703 | unsigned char *block;
|
| 704 |
|
| 705 | block = edid + DETAILED_TIMING_DESCRIPTIONS_START;
|
| 706 |
|
| 707 | DPRINTK(" Monitor Operating Limits: ");
|
| 708 |
|
| 709 | for (i = 0; i < 4; i++, block += DETAILED_TIMING_DESCRIPTION_SIZE) {
|
| 710 | if (edid_is_limits_block(block)) {
|
| 711 | specs->hfmin = H_MIN_RATE * 1000;
|
| 712 | specs->hfmax = H_MAX_RATE * 1000;
|
| 713 | specs->vfmin = V_MIN_RATE;
|
| 714 | specs->vfmax = V_MAX_RATE;
|
| 715 | specs->dclkmax = MAX_PIXEL_CLOCK * 1000000;
|
| 716 | specs->gtf = (GTF_SUPPORT) ? 1 : 0;
|
| 717 | retval = 0;
|
| 718 | DPRINTK("From EDID\n");
|
| 719 | break;
|
| 720 | }
|
| 721 | }
|
| 722 |
|
| 723 |
|
| 724 | if (retval) {
|
| 725 | struct fb_videomode *modes, *mode;
|
| 726 | int num_modes, hz, hscan, pixclock;
|
| 727 | int vtotal, htotal;
|
| 728 |
|
| 729 | modes = fb_create_modedb(edid, &num_modes, specs);
|
| 730 | if (!modes) {
|
| 731 | DPRINTK("None Available\n");
|
| 732 | return 1;
|
| 733 | }
|
| 734 |
|
| 735 | retval = 0;
|
| 736 | for (i = 0; i < num_modes; i++) {
|
| 737 | mode = &modes[i];
|
| 738 | pixclock = PICOS2KHZ(modes[i].pixclock) * 1000;
|
| 739 | htotal = mode->xres + mode->right_margin + mode->hsync_len
|
| 740 | + mode->left_margin;
|
| 741 | vtotal = mode->yres + mode->lower_margin + mode->vsync_len
|
| 742 | + mode->upper_margin;
|
| 743 |
|
| 744 | if (mode->vmode & FB_VMODE_INTERLACED)
|
| 745 | vtotal /= 2;
|
| 746 |
|
| 747 | if (mode->vmode & FB_VMODE_DOUBLE)
|
| 748 | vtotal *= 2;
|
| 749 |
|
| 750 | hscan = (pixclock + htotal / 2) / htotal;
|
| 751 | hscan = (hscan + 500) / 1000 * 1000;
|
| 752 | hz = (hscan + vtotal / 2) / vtotal;
|
| 753 |
|
| 754 | if (specs->dclkmax == 0 || specs->dclkmax < pixclock)
|
| 755 | specs->dclkmax = pixclock;
|
| 756 |
|
| 757 | if (specs->dclkmin == 0 || specs->dclkmin > pixclock)
|
| 758 | specs->dclkmin = pixclock;
|
| 759 |
|
| 760 | if (specs->hfmax == 0 || specs->hfmax < hscan)
|
| 761 | specs->hfmax = hscan;
|
| 762 |
|
| 763 | if (specs->hfmin == 0 || specs->hfmin > hscan)
|
| 764 | specs->hfmin = hscan;
|
| 765 |
|
| 766 | if (specs->vfmax == 0 || specs->vfmax < hz)
|
| 767 | specs->vfmax = hz;
|
| 768 |
|
| 769 | if (specs->vfmin == 0 || specs->vfmin > hz)
|
| 770 | specs->vfmin = hz;
|
| 771 | }
|
| 772 | DPRINTK("Extrapolated\n");
|
| 773 | fb_destroy_modedb(modes);
|
| 774 | }
|
| 775 | DPRINTK(" H: %d-%dKHz V: %d-%dHz DCLK: %dMHz\n",
|
| 776 | specs->hfmin/1000, specs->hfmax/1000, specs->vfmin,
|
| 777 | specs->vfmax, specs->dclkmax/1000000);
|
| 778 | return retval;
|
| 779 | }
|
| 780 |
|
| 781 | static void get_monspecs(unsigned char *edid, struct fb_monspecs *specs)
|
| 782 | {
|
| 783 | unsigned char c, *block;
|
| 784 |
|
| 785 | block = edid + EDID_STRUCT_DISPLAY;
|
| 786 |
|
| 787 | fb_get_monitor_limits(edid, specs);
|
| 788 |
|
| 789 | c = block[0] & 0x80;
|
| 790 | specs->input = 0;
|
| 791 | if (c) {
|
| 792 | specs->input |= FB_DISP_DDI;
|
| 793 | DPRINTK(" Digital Display Input");
|
| 794 | } else {
|
| 795 | DPRINTK(" Analog Display Input: Input Voltage - ");
|
| 796 | switch ((block[0] & 0x60) >> 5) {
|
| 797 | case 0:
|
| 798 | DPRINTK("0.700V/0.300V");
|
| 799 | specs->input |= FB_DISP_ANA_700_300;
|
| 800 | break;
|
| 801 | case 1:
|
| 802 | DPRINTK("0.714V/0.286V");
|
| 803 | specs->input |= FB_DISP_ANA_714_286;
|
| 804 | break;
|
| 805 | case 2:
|
| 806 | DPRINTK("1.000V/0.400V");
|
| 807 | specs->input |= FB_DISP_ANA_1000_400;
|
| 808 | break;
|
| 809 | case 3:
|
| 810 | DPRINTK("0.700V/0.000V");
|
| 811 | specs->input |= FB_DISP_ANA_700_000;
|
| 812 | break;
|
| 813 | }
|
| 814 | }
|
| 815 | DPRINTK("\n Sync: ");
|
| 816 | c = block[0] & 0x10;
|
| 817 | if (c)
|
| 818 | DPRINTK(" Configurable signal level\n");
|
| 819 | c = block[0] & 0x0f;
|
| 820 | specs->signal = 0;
|
| 821 | if (c & 0x10) {
|
| 822 | DPRINTK("Blank to Blank ");
|
| 823 | specs->signal |= FB_SIGNAL_BLANK_BLANK;
|
| 824 | }
|
| 825 | if (c & 0x08) {
|
| 826 | DPRINTK("Separate ");
|
| 827 | specs->signal |= FB_SIGNAL_SEPARATE;
|
| 828 | }
|
| 829 | if (c & 0x04) {
|
| 830 | DPRINTK("Composite ");
|
| 831 | specs->signal |= FB_SIGNAL_COMPOSITE;
|
| 832 | }
|
| 833 | if (c & 0x02) {
|
| 834 | DPRINTK("Sync on Green ");
|
| 835 | specs->signal |= FB_SIGNAL_SYNC_ON_GREEN;
|
| 836 | }
|
| 837 | if (c & 0x01) {
|
| 838 | DPRINTK("Serration on ");
|
| 839 | specs->signal |= FB_SIGNAL_SERRATION_ON;
|
| 840 | }
|
| 841 | DPRINTK("\n");
|
| 842 | specs->max_x = block[1];
|
| 843 | specs->max_y = block[2];
|
| 844 | DPRINTK(" Max H-size in cm: ");
|
| 845 | if (specs->max_x)
|
| 846 | DPRINTK("%d\n", specs->max_x);
|
| 847 | else
|
| 848 | DPRINTK("variable\n");
|
| 849 | DPRINTK(" Max V-size in cm: ");
|
| 850 | if (specs->max_y)
|
| 851 | DPRINTK("%d\n", specs->max_y);
|
| 852 | else
|
| 853 | DPRINTK("variable\n");
|
| 854 |
|
| 855 | c = block[3];
|
| 856 | specs->gamma = c+100;
|
| 857 | DPRINTK(" Gamma: ");
|
| 858 | DPRINTK("%d.%d\n", specs->gamma/100, specs->gamma % 100);
|
| 859 |
|
| 860 | get_dpms_capabilities(block[4], specs);
|
| 861 |
|
| 862 | switch ((block[4] & 0x18) >> 3) {
|
| 863 | case 0:
|
| 864 | DPRINTK(" Monochrome/Grayscale\n");
|
| 865 | specs->input |= FB_DISP_MONO;
|
| 866 | break;
|
| 867 | case 1:
|
| 868 | DPRINTK(" RGB Color Display\n");
|
| 869 | specs->input |= FB_DISP_RGB;
|
| 870 | break;
|
| 871 | case 2:
|
| 872 | DPRINTK(" Non-RGB Multicolor Display\n");
|
| 873 | specs->input |= FB_DISP_MULTI;
|
| 874 | break;
|
| 875 | default:
|
| 876 | DPRINTK(" Unknown\n");
|
| 877 | specs->input |= FB_DISP_UNKNOWN;
|
| 878 | break;
|
| 879 | }
|
| 880 |
|
| 881 | get_chroma(block, specs);
|
| 882 |
|
| 883 | specs->misc = 0;
|
| 884 | c = block[4] & 0x7;
|
| 885 | if (c & 0x04) {
|
| 886 | DPRINTK(" Default color format is primary\n");
|
| 887 | specs->misc |= FB_MISC_PRIM_COLOR;
|
| 888 | }
|
| 889 | if (c & 0x02) {
|
| 890 | DPRINTK(" First DETAILED Timing is preferred\n");
|
| 891 | specs->misc |= FB_MISC_1ST_DETAIL;
|
| 892 | }
|
| 893 | if (c & 0x01) {
|
| 894 | printk(" Display is GTF capable\n");
|
| 895 | specs->gtf = 1;
|
| 896 | }
|
| 897 | }
|
| 898 |
|
| 899 | int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var)
|
| 900 | {
|
| 901 | int i;
|
| 902 | unsigned char *block;
|
| 903 |
|
| 904 | if (edid == NULL || var == NULL)
|
| 905 | return 1;
|
| 906 |
|
| 907 | if (!(edid_checksum(edid)))
|
| 908 | return 1;
|
| 909 |
|
| 910 | if (!(edid_check_header(edid)))
|
| 911 | return 1;
|
| 912 |
|
| 913 | block = edid + DETAILED_TIMING_DESCRIPTIONS_START;
|
| 914 |
|
| 915 | for (i = 0; i < 4; i++, block += DETAILED_TIMING_DESCRIPTION_SIZE) {
|
| 916 | if (edid_is_timing_block(block)) {
|
| 917 | var->xres = var->xres_virtual = H_ACTIVE;
|
| 918 | var->yres = var->yres_virtual = V_ACTIVE;
|
| 919 | var->height = var->width = 0;
|
| 920 | var->right_margin = H_SYNC_OFFSET;
|
| 921 | var->left_margin = (H_ACTIVE + H_BLANKING) -
|
| 922 | (H_ACTIVE + H_SYNC_OFFSET + H_SYNC_WIDTH);
|
| 923 | var->upper_margin = V_BLANKING - V_SYNC_OFFSET -
|
| 924 | V_SYNC_WIDTH;
|
| 925 | var->lower_margin = V_SYNC_OFFSET;
|
| 926 | var->hsync_len = H_SYNC_WIDTH;
|
| 927 | var->vsync_len = V_SYNC_WIDTH;
|
| 928 | var->pixclock = PIXEL_CLOCK;
|
| 929 | var->pixclock /= 1000;
|
| 930 | var->pixclock = KHZ2PICOS(var->pixclock);
|
| 931 |
|
| 932 | if (HSYNC_POSITIVE)
|
| 933 | var->sync |= FB_SYNC_HOR_HIGH_ACT;
|
| 934 | if (VSYNC_POSITIVE)
|
| 935 | var->sync |= FB_SYNC_VERT_HIGH_ACT;
|
| 936 | return 0;
|
| 937 | }
|
| 938 | }
|
| 939 | return 1;
|
| 940 | }
|
| 941 |
|
| 942 | void fb_edid_to_monspecs(unsigned char *edid, struct fb_monspecs *specs)
|
| 943 | {
|
| 944 | unsigned char *block;
|
| 945 | int i, found = 0;
|
| 946 |
|
| 947 | if (edid == NULL)
|
| 948 | return;
|
| 949 |
|
| 950 | if (!(edid_checksum(edid)))
|
| 951 | return;
|
| 952 |
|
| 953 | if (!(edid_check_header(edid)))
|
| 954 | return;
|
| 955 |
|
| 956 | memset(specs, 0, sizeof(struct fb_monspecs));
|
| 957 |
|
| 958 | specs->version = edid[EDID_STRUCT_VERSION];
|
| 959 | specs->revision = edid[EDID_STRUCT_REVISION];
|
| 960 |
|
| 961 | DPRINTK("========================================\n");
|
| 962 | DPRINTK("Display Information (EDID)\n");
|
| 963 | DPRINTK("========================================\n");
|
| 964 | DPRINTK(" EDID Version %d.%d\n", (int) specs->version,
|
| 965 | (int) specs->revision);
|
| 966 |
|
| 967 | parse_vendor_block(edid + ID_MANUFACTURER_NAME, specs);
|
| 968 |
|
| 969 | block = edid + DETAILED_TIMING_DESCRIPTIONS_START;
|
| 970 | for (i = 0; i < 4; i++, block += DETAILED_TIMING_DESCRIPTION_SIZE) {
|
| 971 | if (edid_is_serial_block(block)) {
|
| 972 | copy_string(block, specs->serial_no);
|
| 973 | DPRINTK(" Serial Number: %s\n", specs->serial_no);
|
| 974 | } else if (edid_is_ascii_block(block)) {
|
| 975 | copy_string(block, specs->ascii);
|
| 976 | DPRINTK(" ASCII Block: %s\n", specs->ascii);
|
| 977 | } else if (edid_is_monitor_block(block)) {
|
| 978 | copy_string(block, specs->monitor);
|
| 979 | DPRINTK(" Monitor Name: %s\n", specs->monitor);
|
| 980 | }
|
| 981 | }
|
| 982 |
|
| 983 | DPRINTK(" Display Characteristics:\n");
|
| 984 | get_monspecs(edid, specs);
|
| 985 |
|
| 986 | specs->modedb = fb_create_modedb(edid, &specs->modedb_len, specs);
|
| 987 | if (!specs->modedb)
|
| 988 | return;
|
| 989 |
|
| 990 | |
| 991 | * Workaround for buggy EDIDs that sets that the first
|
| 992 | * detailed timing is preferred but has not detailed
|
| 993 | * timing specified
|
| 994 |
|
| 995 | for (i = 0; i < specs->modedb_len; i++) {
|
| 996 | if (specs->modedb[i].flag & FB_MODE_IS_DETAILED) {
|
| 997 | found = 1;
|
| 998 | break;
|
| 999 | }
|
| 1000 | }
|
| 1001 |
|
| 1002 | if (!found)
|
| 1003 | specs->misc &= ~FB_MISC_1ST_DETAIL;
|
| 1004 |
|
| 1005 | DPRINTK("========================================\n");
|
| 1006 | }
|
| 1007 |
|
| 1008 | |
| 1009 | * VESA Generalized Timing Formula (GTF)
|
| 1010 |
|
| 1011 |
|
| 1012 | #define FLYBACK 550
|
| 1013 | #define V_FRONTPORCH 1
|
| 1014 | #define H_OFFSET 40
|
| 1015 | #define H_SCALEFACTOR 20
|
| 1016 | #define H_BLANKSCALE 128
|
| 1017 | #define H_GRADIENT 600
|
| 1018 | #define C_VAL 30
|
| 1019 | #define M_VAL 300
|
| 1020 |
|
| 1021 | struct __fb_timings {
|
| 1022 | u32 dclk;
|
| 1023 | u32 hfreq;
|
| 1024 | u32 vfreq;
|
| 1025 | u32 hactive;
|
| 1026 | u32 vactive;
|
| 1027 | u32 hblank;
|
| 1028 | u32 vblank;
|
| 1029 | u32 htotal;
|
| 1030 | u32 vtotal;
|
| 1031 | };
|
| 1032 |
|
| 1033 | |
| 1034 | * fb_get_vblank - get vertical blank time
|
| 1035 | * @hfreq: horizontal freq
|
| 1036 | *
|
| 1037 | * DESCRIPTION:
|
| 1038 | * vblank = right_margin + vsync_len + left_margin
|
| 1039 | *
|
| 1040 | * given: right_margin = 1 (V_FRONTPORCH)
|
| 1041 | * vsync_len = 3
|
| 1042 | * flyback = 550
|
| 1043 | *
|
| 1044 | * flyback * hfreq
|
| 1045 | * left_margin = --------------- - vsync_len
|
| 1046 | * 1000000
|
| 1047 |
|
| 1048 | static u32 fb_get_vblank(u32 hfreq)
|
| 1049 | {
|
| 1050 | u32 vblank;
|
| 1051 |
|
| 1052 | vblank = (hfreq * FLYBACK)/1000;
|
| 1053 | vblank = (vblank + 500)/1000;
|
| 1054 | return (vblank + V_FRONTPORCH);
|
| 1055 | }
|
| 1056 |
|
| 1057 | |
| 1058 | * fb_get_hblank_by_hfreq - get horizontal blank time given hfreq
|
| 1059 | * @hfreq: horizontal freq
|
| 1060 | * @xres: horizontal resolution in pixels
|
| 1061 | *
|
| 1062 | * DESCRIPTION:
|
| 1063 | *
|
| 1064 | * xres * duty_cycle
|
| 1065 | * hblank = ------------------
|
| 1066 | * 100 - duty_cycle
|
| 1067 | *
|
| 1068 | * duty cycle = percent of htotal assigned to inactive display
|
| 1069 | * duty cycle = C - (M/Hfreq)
|
| 1070 | *
|
| 1071 | * where: C = ((offset - scale factor) * blank_scale)
|
| 1072 | * -------------------------------------- + scale factor
|
| 1073 | * 256
|
| 1074 | * M = blank_scale * gradient
|
| 1075 | *
|
| 1076 |
|
| 1077 | static u32 fb_get_hblank_by_hfreq(u32 hfreq, u32 xres)
|
| 1078 | {
|
| 1079 | u32 c_val, m_val, duty_cycle, hblank;
|
| 1080 |
|
| 1081 | c_val = (((H_OFFSET - H_SCALEFACTOR) * H_BLANKSCALE)/256 +
|
| 1082 | H_SCALEFACTOR) * 1000;
|
| 1083 | m_val = (H_BLANKSCALE * H_GRADIENT)/256;
|
| 1084 | m_val = (m_val * 1000000)/hfreq;
|
| 1085 | duty_cycle = c_val - m_val;
|
| 1086 | hblank = (xres * duty_cycle)/(100000 - duty_cycle);
|
| 1087 | return (hblank);
|
| 1088 | }
|
| 1089 |
|
| 1090 | |
| 1091 | * fb_get_hblank_by_dclk - get horizontal blank time given pixelclock
|
| 1092 | * @dclk: pixelclock in Hz
|
| 1093 | * @xres: horizontal resolution in pixels
|
| 1094 | *
|
| 1095 | * DESCRIPTION:
|
| 1096 | *
|
| 1097 | * xres * duty_cycle
|
| 1098 | * hblank = ------------------
|
| 1099 | * 100 - duty_cycle
|
| 1100 | *
|
| 1101 | * duty cycle = percent of htotal assigned to inactive display
|
| 1102 | * duty cycle = C - (M * h_period)
|
| 1103 | *
|
| 1104 | * where: h_period = SQRT(100 - C + (0.4 * xres * M)/dclk) + C - 100
|
| 1105 | * -----------------------------------------------
|
| 1106 | * 2 * M
|
| 1107 | * M = 300;
|
| 1108 | * C = 30;
|
| 1109 |
|
| 1110 | static u32 fb_get_hblank_by_dclk(u32 dclk, u32 xres)
|
| 1111 | {
|
| 1112 | u32 duty_cycle, h_period, hblank;
|
| 1113 |
|
| 1114 | dclk /= 1000;
|
| 1115 | h_period = 100 - C_VAL;
|
| 1116 | h_period *= h_period;
|
| 1117 | h_period += (M_VAL * xres * 2 * 1000)/(5 * dclk);
|
| 1118 | h_period *= 10000;
|
| 1119 |
|
| 1120 | h_period = int_sqrt(h_period);
|
| 1121 | h_period -= (100 - C_VAL) * 100;
|
| 1122 | h_period *= 1000;
|
| 1123 | h_period /= 2 * M_VAL;
|
| 1124 |
|
| 1125 | duty_cycle = C_VAL * 1000 - (M_VAL * h_period)/100;
|
| 1126 | hblank = (xres * duty_cycle)/(100000 - duty_cycle) + 8;
|
| 1127 | hblank &= ~15;
|
| 1128 | return (hblank);
|
| 1129 | }
|
| 1130 |
|
| 1131 | |
| 1132 | * fb_get_hfreq - estimate hsync
|
| 1133 | * @vfreq: vertical refresh rate
|
| 1134 | * @yres: vertical resolution
|
| 1135 | *
|
| 1136 | * DESCRIPTION:
|
| 1137 | *
|
| 1138 | * (yres + front_port) * vfreq * 1000000
|
| 1139 | * hfreq = -------------------------------------
|
| 1140 | * (1000000 - (vfreq * FLYBACK)
|
| 1141 | *
|
| 1142 |
|
| 1143 |
|
| 1144 | static u32 fb_get_hfreq(u32 vfreq, u32 yres)
|
| 1145 | {
|
| 1146 | u32 divisor, hfreq;
|
| 1147 |
|
| 1148 | divisor = (1000000 - (vfreq * FLYBACK))/1000;
|
| 1149 | hfreq = (yres + V_FRONTPORCH) * vfreq * 1000;
|
| 1150 | return (hfreq/divisor);
|
| 1151 | }
|
| 1152 |
|
| 1153 | static void fb_timings_vfreq(struct __fb_timings *timings)
|
| 1154 | {
|
| 1155 | timings->hfreq = fb_get_hfreq(timings->vfreq, timings->vactive);
|
| 1156 | timings->vblank = fb_get_vblank(timings->hfreq);
|
| 1157 | timings->vtotal = timings->vactive + timings->vblank;
|
| 1158 | timings->hblank = fb_get_hblank_by_hfreq(timings->hfreq,
|
| 1159 | timings->hactive);
|
| 1160 | timings->htotal = timings->hactive + timings->hblank;
|
| 1161 | timings->dclk = timings->htotal * timings->hfreq;
|
| 1162 | }
|
| 1163 |
|
| 1164 | static void fb_timings_hfreq(struct __fb_timings *timings)
|
| 1165 | {
|
| 1166 | timings->vblank = fb_get_vblank(timings->hfreq);
|
| 1167 | timings->vtotal = timings->vactive + timings->vblank;
|
| 1168 | timings->vfreq = timings->hfreq/timings->vtotal;
|
| 1169 | timings->hblank = fb_get_hblank_by_hfreq(timings->hfreq,
|
| 1170 | timings->hactive);
|
| 1171 | timings->htotal = timings->hactive + timings->hblank;
|
| 1172 | timings->dclk = timings->htotal * timings->hfreq;
|
| 1173 | }
|
| 1174 |
|
| 1175 | static void fb_timings_dclk(struct __fb_timings *timings)
|
| 1176 | {
|
| 1177 | timings->hblank = fb_get_hblank_by_dclk(timings->dclk,
|
| 1178 | timings->hactive);
|
| 1179 | timings->htotal = timings->hactive + timings->hblank;
|
| 1180 | timings->hfreq = timings->dclk/timings->htotal;
|
| 1181 | timings->vblank = fb_get_vblank(timings->hfreq);
|
| 1182 | timings->vtotal = timings->vactive + timings->vblank;
|
| 1183 | timings->vfreq = timings->hfreq/timings->vtotal;
|
| 1184 | }
|
| 1185 |
|
| 1186 | |
| 1187 | * fb_get_mode - calculates video mode using VESA GTF
|
| 1188 | * @flags: if: 0 - maximize vertical refresh rate
|
| 1189 | * 1 - vrefresh-driven calculation;
|
| 1190 | * 2 - hscan-driven calculation;
|
| 1191 | * 3 - pixelclock-driven calculation;
|
| 1192 | * @val: depending on @flags, ignored, vrefresh, hsync or pixelclock
|
| 1193 | * @var: pointer to fb_var_screeninfo
|
| 1194 | * @info: pointer to fb_info
|
| 1195 | *
|
| 1196 | * DESCRIPTION:
|
| 1197 | * Calculates video mode based on monitor specs using VESA GTF.
|
| 1198 | * The GTF is best for VESA GTF compliant monitors but is
|
| 1199 | * specifically formulated to work for older monitors as well.
|
| 1200 | *
|
| 1201 | * If @flag==0, the function will attempt to maximize the
|
| 1202 | * refresh rate. Otherwise, it will calculate timings based on
|
| 1203 | * the flag and accompanying value.
|
| 1204 | *
|
| 1205 | * If FB_IGNOREMON bit is set in @flags, monitor specs will be
|
| 1206 | * ignored and @var will be filled with the calculated timings.
|
| 1207 | *
|
| 1208 | * All calculations are based on the VESA GTF Spreadsheet
|
| 1209 | * available at VESA's public ftp (https://www.vesa.org).
|
| 1210 | *
|
| 1211 | * NOTES:
|
| 1212 | * The timings generated by the GTF will be different from VESA
|
| 1213 | * DMT. It might be a good idea to keep a table of standard
|
| 1214 | * VESA modes as well. The GTF may also not work for some displays,
|
| 1215 | * such as, and especially, analog TV.
|
| 1216 | *
|
| 1217 | * REQUIRES:
|
| 1218 | * A valid info->monspecs, otherwise 'safe numbers' will be used.
|
| 1219 |
|
| 1220 | int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var, struct fb_info *info)
|
| 1221 | {
|
| 1222 | struct __fb_timings *timings;
|
| 1223 | u32 interlace = 1, dscan = 1;
|
| 1224 | u32 hfmin, hfmax, vfmin, vfmax, dclkmin, dclkmax, err = 0;
|
| 1225 |
|
| 1226 |
|
| 1227 | timings = kzalloc_obj(struct __fb_timings);
|
| 1228 |
|
| 1229 | if (!timings)
|
| 1230 | return -ENOMEM;
|
| 1231 |
|
| 1232 | |
| 1233 | * If monspecs are invalid, use values that are enough
|
| 1234 | * for 640x480@60
|
| 1235 |
|
| 1236 | if (!info || !info->monspecs.hfmax || !info->monspecs.vfmax ||
|
| 1237 | !info->monspecs.dclkmax ||
|
| 1238 | info->monspecs.hfmax < info->monspecs.hfmin ||
|
| 1239 | info->monspecs.vfmax < info->monspecs.vfmin ||
|
| 1240 | info->monspecs.dclkmax < info->monspecs.dclkmin) {
|
| 1241 | hfmin = 29000; hfmax = 30000;
|
| 1242 | vfmin = 60; vfmax = 60;
|
| 1243 | dclkmin = 0; dclkmax = 25000000;
|
| 1244 | } else {
|
| 1245 | hfmin = info->monspecs.hfmin;
|
| 1246 | hfmax = info->monspecs.hfmax;
|
| 1247 | vfmin = info->monspecs.vfmin;
|
| 1248 | vfmax = info->monspecs.vfmax;
|
| 1249 | dclkmin = info->monspecs.dclkmin;
|
| 1250 | dclkmax = info->monspecs.dclkmax;
|
| 1251 | }
|
| 1252 |
|
| 1253 | timings->hactive = var->xres;
|
| 1254 | timings->vactive = var->yres;
|
| 1255 | if (var->vmode & FB_VMODE_INTERLACED) {
|
| 1256 | timings->vactive /= 2;
|
| 1257 | interlace = 2;
|
| 1258 | }
|
| 1259 | if (var->vmode & FB_VMODE_DOUBLE) {
|
| 1260 | timings->vactive *= 2;
|
| 1261 | dscan = 2;
|
| 1262 | }
|
| 1263 |
|
| 1264 | switch (flags & ~FB_IGNOREMON) {
|
| 1265 | case FB_MAXTIMINGS:
|
| 1266 | timings->hfreq = hfmax;
|
| 1267 | fb_timings_hfreq(timings);
|
| 1268 | if (timings->vfreq > vfmax) {
|
| 1269 | timings->vfreq = vfmax;
|
| 1270 | fb_timings_vfreq(timings);
|
| 1271 | }
|
| 1272 | if (timings->dclk > dclkmax) {
|
| 1273 | timings->dclk = dclkmax;
|
| 1274 | fb_timings_dclk(timings);
|
| 1275 | }
|
| 1276 | break;
|
| 1277 | case FB_VSYNCTIMINGS:
|
| 1278 | timings->vfreq = val;
|
| 1279 | fb_timings_vfreq(timings);
|
| 1280 | break;
|
| 1281 | case FB_HSYNCTIMINGS:
|
| 1282 | timings->hfreq = val;
|
| 1283 | fb_timings_hfreq(timings);
|
| 1284 | break;
|
| 1285 | case FB_DCLKTIMINGS:
|
| 1286 | timings->dclk = PICOS2KHZ(val) * 1000;
|
| 1287 | fb_timings_dclk(timings);
|
| 1288 | break;
|
| 1289 | default:
|
| 1290 | err = -EINVAL;
|
| 1291 |
|
| 1292 | }
|
| 1293 |
|
| 1294 | if (err || (!(flags & FB_IGNOREMON) &&
|
| 1295 | (timings->vfreq < vfmin || timings->vfreq > vfmax ||
|
| 1296 | timings->hfreq < hfmin || timings->hfreq > hfmax ||
|
| 1297 | timings->dclk < dclkmin || timings->dclk > dclkmax))) {
|
| 1298 | err = -EINVAL;
|
| 1299 | } else {
|
| 1300 | var->pixclock = KHZ2PICOS(timings->dclk/1000);
|
| 1301 | var->hsync_len = (timings->htotal * 8)/100;
|
| 1302 | var->right_margin = (timings->hblank/2) - var->hsync_len;
|
| 1303 | var->left_margin = timings->hblank - var->right_margin -
|
| 1304 | var->hsync_len;
|
| 1305 | var->vsync_len = (3 * interlace)/dscan;
|
| 1306 | var->lower_margin = (1 * interlace)/dscan;
|
| 1307 | var->upper_margin = (timings->vblank * interlace)/dscan -
|
| 1308 | (var->vsync_len + var->lower_margin);
|
| 1309 | }
|
| 1310 |
|
| 1311 | kfree(timings);
|
| 1312 | return err;
|
| 1313 | }
|
| 1314 |
|
| 1315 | #ifdef CONFIG_VIDEOMODE_HELPERS
|
| 1316 | int fb_videomode_from_videomode(const struct videomode *vm,
|
| 1317 | struct fb_videomode *fbmode)
|
| 1318 | {
|
| 1319 | unsigned int htotal, vtotal, total;
|
| 1320 |
|
| 1321 | fbmode->xres = vm->hactive;
|
| 1322 | fbmode->left_margin = vm->hback_porch;
|
| 1323 | fbmode->right_margin = vm->hfront_porch;
|
| 1324 | fbmode->hsync_len = vm->hsync_len;
|
| 1325 |
|
| 1326 | fbmode->yres = vm->vactive;
|
| 1327 | fbmode->upper_margin = vm->vback_porch;
|
| 1328 | fbmode->lower_margin = vm->vfront_porch;
|
| 1329 | fbmode->vsync_len = vm->vsync_len;
|
| 1330 |
|
| 1331 |
|
| 1332 | fbmode->pixclock = vm->pixelclock ?
|
| 1333 | KHZ2PICOS(vm->pixelclock / 1000) : 0;
|
| 1334 |
|
| 1335 | fbmode->sync = 0;
|
| 1336 | fbmode->vmode = 0;
|
| 1337 | if (vm->flags & DISPLAY_FLAGS_HSYNC_HIGH)
|
| 1338 | fbmode->sync |= FB_SYNC_HOR_HIGH_ACT;
|
| 1339 | if (vm->flags & DISPLAY_FLAGS_VSYNC_HIGH)
|
| 1340 | fbmode->sync |= FB_SYNC_VERT_HIGH_ACT;
|
| 1341 | if (vm->flags & DISPLAY_FLAGS_INTERLACED)
|
| 1342 | fbmode->vmode |= FB_VMODE_INTERLACED;
|
| 1343 | if (vm->flags & DISPLAY_FLAGS_DOUBLESCAN)
|
| 1344 | fbmode->vmode |= FB_VMODE_DOUBLE;
|
| 1345 | fbmode->flag = 0;
|
| 1346 |
|
| 1347 | htotal = vm->hactive + vm->hfront_porch + vm->hback_porch +
|
| 1348 | vm->hsync_len;
|
| 1349 | vtotal = vm->vactive + vm->vfront_porch + vm->vback_porch +
|
| 1350 | vm->vsync_len;
|
| 1351 |
|
| 1352 | total = htotal * vtotal;
|
| 1353 | if (total) {
|
| 1354 | fbmode->refresh = vm->pixelclock / total;
|
| 1355 |
|
| 1356 | } else {
|
| 1357 | fbmode->refresh = 0;
|
| 1358 | return -EINVAL;
|
| 1359 | }
|
| 1360 |
|
| 1361 | return 0;
|
| 1362 | }
|
| 1363 | EXPORT_SYMBOL_GPL(fb_videomode_from_videomode);
|
| 1364 |
|
| 1365 | #ifdef CONFIG_OF
|
| 1366 | static inline void dump_fb_videomode(const struct fb_videomode *m)
|
| 1367 | {
|
| 1368 | pr_debug("fb_videomode = %ux%u@%uHz (%ukHz) %u %u %u %u %u %u %u %u %u\n",
|
| 1369 | m->xres, m->yres, m->refresh, m->pixclock, m->left_margin,
|
| 1370 | m->right_margin, m->upper_margin, m->lower_margin,
|
| 1371 | m->hsync_len, m->vsync_len, m->sync, m->vmode, m->flag);
|
| 1372 | }
|
| 1373 |
|
| 1374 | |
| 1375 | * of_get_fb_videomode - get a fb_videomode from devicetree
|
| 1376 | * @np: device_node with the timing specification
|
| 1377 | * @fb: will be set to the return value
|
| 1378 | * @index: index into the list of display timings in devicetree
|
| 1379 | *
|
| 1380 | * DESCRIPTION:
|
| 1381 | * This function is expensive and should only be used, if only one mode is to be
|
| 1382 | * read from DT. To get multiple modes start with of_get_display_timings ond
|
| 1383 | * work with that instead.
|
| 1384 |
|
| 1385 | int of_get_fb_videomode(struct device_node *np, struct fb_videomode *fb,
|
| 1386 | int index)
|
| 1387 | {
|
| 1388 | struct videomode vm;
|
| 1389 | int ret;
|
| 1390 |
|
| 1391 | ret = of_get_videomode(np, &vm, index);
|
| 1392 | if (ret)
|
| 1393 | return ret;
|
| 1394 |
|
| 1395 | ret = fb_videomode_from_videomode(&vm, fb);
|
| 1396 | if (ret)
|
| 1397 | return ret;
|
| 1398 |
|
| 1399 | pr_debug("%pOF: got %dx%d display mode\n",
|
| 1400 | np, vm.hactive, vm.vactive);
|
| 1401 | dump_fb_videomode(fb);
|
| 1402 |
|
| 1403 | return 0;
|
| 1404 | }
|
| 1405 | EXPORT_SYMBOL_GPL(of_get_fb_videomode);
|
| 1406 | #endif
|
| 1407 | #endif
|
| 1408 |
|
| 1409 | #else
|
| 1410 | int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var)
|
| 1411 | {
|
| 1412 | return 1;
|
| 1413 | }
|
| 1414 | void fb_edid_to_monspecs(unsigned char *edid, struct fb_monspecs *specs)
|
| 1415 | {
|
| 1416 | }
|
| 1417 | void fb_destroy_modedb(struct fb_videomode *modedb)
|
| 1418 | {
|
| 1419 | }
|
| 1420 | int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var,
|
| 1421 | struct fb_info *info)
|
| 1422 | {
|
| 1423 | return -EINVAL;
|
| 1424 | }
|
| 1425 | #endif
|
| 1426 |
|
| 1427 | |
| 1428 | * fb_validate_mode - validates var against monitor capabilities
|
| 1429 | * @var: pointer to fb_var_screeninfo
|
| 1430 | * @info: pointer to fb_info
|
| 1431 | *
|
| 1432 | * DESCRIPTION:
|
| 1433 | * Validates video mode against monitor capabilities specified in
|
| 1434 | * info->monspecs.
|
| 1435 | *
|
| 1436 | * REQUIRES:
|
| 1437 | * A valid info->monspecs.
|
| 1438 |
|
| 1439 | int fb_validate_mode(const struct fb_var_screeninfo *var, struct fb_info *info)
|
| 1440 | {
|
| 1441 | u32 hfreq, vfreq, htotal, vtotal, pixclock;
|
| 1442 | u32 hfmin, hfmax, vfmin, vfmax, dclkmin, dclkmax;
|
| 1443 |
|
| 1444 | |
| 1445 | * If monspecs are invalid, use values that are enough
|
| 1446 | * for 640x480@60
|
| 1447 |
|
| 1448 | if (!info->monspecs.hfmax || !info->monspecs.vfmax ||
|
| 1449 | !info->monspecs.dclkmax ||
|
| 1450 | info->monspecs.hfmax < info->monspecs.hfmin ||
|
| 1451 | info->monspecs.vfmax < info->monspecs.vfmin ||
|
| 1452 | info->monspecs.dclkmax < info->monspecs.dclkmin) {
|
| 1453 | hfmin = 29000; hfmax = 30000;
|
| 1454 | vfmin = 60; vfmax = 60;
|
| 1455 | dclkmin = 0; dclkmax = 25000000;
|
| 1456 | } else {
|
| 1457 | hfmin = info->monspecs.hfmin;
|
| 1458 | hfmax = info->monspecs.hfmax;
|
| 1459 | vfmin = info->monspecs.vfmin;
|
| 1460 | vfmax = info->monspecs.vfmax;
|
| 1461 | dclkmin = info->monspecs.dclkmin;
|
| 1462 | dclkmax = info->monspecs.dclkmax;
|
| 1463 | }
|
| 1464 |
|
| 1465 | if (!var->pixclock)
|
| 1466 | return -EINVAL;
|
| 1467 | pixclock = PICOS2KHZ(var->pixclock) * 1000;
|
| 1468 |
|
| 1469 | htotal = var->xres + var->right_margin + var->hsync_len +
|
| 1470 | var->left_margin;
|
| 1471 | vtotal = var->yres + var->lower_margin + var->vsync_len +
|
| 1472 | var->upper_margin;
|
| 1473 |
|
| 1474 | if (var->vmode & FB_VMODE_INTERLACED)
|
| 1475 | vtotal /= 2;
|
| 1476 | if (var->vmode & FB_VMODE_DOUBLE)
|
| 1477 | vtotal *= 2;
|
| 1478 |
|
| 1479 | hfreq = pixclock/htotal;
|
| 1480 | hfreq = (hfreq + 500) / 1000 * 1000;
|
| 1481 |
|
| 1482 | vfreq = hfreq/vtotal;
|
| 1483 |
|
| 1484 | return (vfreq < vfmin || vfreq > vfmax ||
|
| 1485 | hfreq < hfmin || hfreq > hfmax ||
|
| 1486 | pixclock < dclkmin || pixclock > dclkmax) ?
|
| 1487 | -EINVAL : 0;
|
| 1488 | }
|
| 1489 |
|
| 1490 | |
| 1491 | * We need to ensure that the EDID block is only returned for
|
| 1492 | * the primary graphics adapter.
|
| 1493 |
|
| 1494 |
|
| 1495 | #if defined(CONFIG_FIRMWARE_EDID)
|
| 1496 | const unsigned char *fb_firmware_edid(struct device *device)
|
| 1497 | {
|
| 1498 | struct pci_dev *dev = NULL;
|
| 1499 | struct resource *res = NULL;
|
| 1500 | unsigned char *edid = NULL;
|
| 1501 |
|
| 1502 | if (device)
|
| 1503 | dev = to_pci_dev(device);
|
| 1504 |
|
| 1505 | if (dev)
|
| 1506 | res = &dev->resource[PCI_ROM_RESOURCE];
|
| 1507 |
|
| 1508 | if (res && res->flags & IORESOURCE_ROM_SHADOW)
|
| 1509 | edid = sysfb_primary_display.edid.dummy;
|
| 1510 |
|
| 1511 | return edid;
|
| 1512 | }
|
| 1513 | #else
|
| 1514 | const unsigned char *fb_firmware_edid(struct device *device)
|
| 1515 | {
|
| 1516 | return NULL;
|
| 1517 | }
|
| 1518 | #endif
|
| 1519 | EXPORT_SYMBOL(fb_firmware_edid);
|
| 1520 |
|
| 1521 | EXPORT_SYMBOL(fb_parse_edid);
|
| 1522 | EXPORT_SYMBOL(fb_edid_to_monspecs);
|
| 1523 | EXPORT_SYMBOL(fb_get_mode);
|
| 1524 | EXPORT_SYMBOL(fb_validate_mode);
|
| 1525 | EXPORT_SYMBOL(fb_destroy_modedb);
|