Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/drivers/video/fbmon.c |
| 3 | * |
| 4 | * Copyright (C) 2002 James Simmons <jsimmons@users.sf.net> |
| 5 | * |
| 6 | * Credits: |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 7 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | * The EDID Parser is a conglomeration from the following sources: |
| 9 | * |
| 10 | * 1. SciTech SNAP Graphics Architecture |
| 11 | * Copyright (C) 1991-2002 SciTech Software, Inc. All rights reserved. |
| 12 | * |
| 13 | * 2. XFree86 4.3.0, interpret_edid.c |
| 14 | * Copyright 1998 by Egbert Eich <Egbert.Eich@Physik.TU-Darmstadt.DE> |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 15 | * |
| 16 | * 3. John Fremlin <vii@users.sourceforge.net> and |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | * Ani Joshi <ajoshi@unixbox.com> |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 18 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | * Generalized Timing Formula is derived from: |
| 20 | * |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 21 | * GTF Spreadsheet by Andy Morrish (1/5/97) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | * available at http://www.vesa.org |
| 23 | * |
| 24 | * This file is subject to the terms and conditions of the GNU General Public |
| 25 | * License. See the file COPYING in the main directory of this archive |
| 26 | * for more details. |
| 27 | * |
| 28 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <linux/fb.h> |
| 30 | #include <linux/module.h> |
Adrian Bunk | 22f4a00 | 2006-06-26 00:26:28 -0700 | [diff] [blame] | 31 | #include <linux/pci.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 32 | #include <linux/slab.h> |
Antonino A. Daplas | 5e518d7 | 2005-09-09 13:04:34 -0700 | [diff] [blame] | 33 | #include <video/edid.h> |
Steffen Trumtrar | 2db54c7 | 2012-11-14 10:55:04 +0100 | [diff] [blame^] | 34 | #include <video/videomode.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #ifdef CONFIG_PPC_OF |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include <asm/prom.h> |
| 37 | #include <asm/pci-bridge.h> |
| 38 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include "edid.h" |
| 40 | |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 41 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | * EDID parser |
| 43 | */ |
| 44 | |
| 45 | #undef DEBUG /* define this for verbose EDID parsing output */ |
| 46 | |
| 47 | #ifdef DEBUG |
| 48 | #define DPRINTK(fmt, args...) printk(fmt,## args) |
| 49 | #else |
| 50 | #define DPRINTK(fmt, args...) |
| 51 | #endif |
| 52 | |
Antonino A. Daplas | 33a9f64 | 2007-05-08 00:37:23 -0700 | [diff] [blame] | 53 | #define FBMON_FIX_HEADER 1 |
| 54 | #define FBMON_FIX_INPUT 2 |
| 55 | #define FBMON_FIX_TIMINGS 3 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | |
| 57 | #ifdef CONFIG_FB_MODE_HELPERS |
| 58 | struct broken_edid { |
| 59 | u8 manufacturer[4]; |
| 60 | u32 model; |
| 61 | u32 fix; |
| 62 | }; |
| 63 | |
Helge Deller | d95159c | 2006-12-08 02:40:28 -0800 | [diff] [blame] | 64 | static const struct broken_edid brokendb[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | /* DEC FR-PCXAV-YZ */ |
| 66 | { |
| 67 | .manufacturer = "DEC", |
| 68 | .model = 0x073a, |
| 69 | .fix = FBMON_FIX_HEADER, |
| 70 | }, |
| 71 | /* ViewSonic PF775a */ |
| 72 | { |
| 73 | .manufacturer = "VSC", |
| 74 | .model = 0x5a44, |
| 75 | .fix = FBMON_FIX_INPUT, |
| 76 | }, |
Antonino A. Daplas | 33a9f64 | 2007-05-08 00:37:23 -0700 | [diff] [blame] | 77 | /* Sharp UXGA? */ |
| 78 | { |
| 79 | .manufacturer = "SHP", |
| 80 | .model = 0x138e, |
| 81 | .fix = FBMON_FIX_TIMINGS, |
| 82 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | }; |
| 84 | |
| 85 | static const unsigned char edid_v1_header[] = { 0x00, 0xff, 0xff, 0xff, |
| 86 | 0xff, 0xff, 0xff, 0x00 |
| 87 | }; |
| 88 | |
| 89 | static void copy_string(unsigned char *c, unsigned char *s) |
| 90 | { |
| 91 | int i; |
| 92 | c = c + 5; |
| 93 | for (i = 0; (i < 13 && *c != 0x0A); i++) |
| 94 | *(s++) = *(c++); |
| 95 | *s = 0; |
| 96 | while (i-- && (*--s == 0x20)) *s = 0; |
| 97 | } |
| 98 | |
Antonino A. Daplas | 33a9f64 | 2007-05-08 00:37:23 -0700 | [diff] [blame] | 99 | static int edid_is_serial_block(unsigned char *block) |
| 100 | { |
| 101 | if ((block[0] == 0x00) && (block[1] == 0x00) && |
| 102 | (block[2] == 0x00) && (block[3] == 0xff) && |
| 103 | (block[4] == 0x00)) |
| 104 | return 1; |
| 105 | else |
| 106 | return 0; |
| 107 | } |
| 108 | |
| 109 | static int edid_is_ascii_block(unsigned char *block) |
| 110 | { |
| 111 | if ((block[0] == 0x00) && (block[1] == 0x00) && |
| 112 | (block[2] == 0x00) && (block[3] == 0xfe) && |
| 113 | (block[4] == 0x00)) |
| 114 | return 1; |
| 115 | else |
| 116 | return 0; |
| 117 | } |
| 118 | |
| 119 | static int edid_is_limits_block(unsigned char *block) |
| 120 | { |
| 121 | if ((block[0] == 0x00) && (block[1] == 0x00) && |
| 122 | (block[2] == 0x00) && (block[3] == 0xfd) && |
| 123 | (block[4] == 0x00)) |
| 124 | return 1; |
| 125 | else |
| 126 | return 0; |
| 127 | } |
| 128 | |
| 129 | static int edid_is_monitor_block(unsigned char *block) |
| 130 | { |
| 131 | if ((block[0] == 0x00) && (block[1] == 0x00) && |
| 132 | (block[2] == 0x00) && (block[3] == 0xfc) && |
| 133 | (block[4] == 0x00)) |
| 134 | return 1; |
| 135 | else |
| 136 | return 0; |
| 137 | } |
| 138 | |
| 139 | static int edid_is_timing_block(unsigned char *block) |
| 140 | { |
| 141 | if ((block[0] != 0x00) || (block[1] != 0x00) || |
| 142 | (block[2] != 0x00) || (block[4] != 0x00)) |
| 143 | return 1; |
| 144 | else |
| 145 | return 0; |
| 146 | } |
| 147 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | static int check_edid(unsigned char *edid) |
| 149 | { |
| 150 | unsigned char *block = edid + ID_MANUFACTURER_NAME, manufacturer[4]; |
| 151 | unsigned char *b; |
| 152 | u32 model; |
| 153 | int i, fix = 0, ret = 0; |
| 154 | |
| 155 | manufacturer[0] = ((block[0] & 0x7c) >> 2) + '@'; |
| 156 | manufacturer[1] = ((block[0] & 0x03) << 3) + |
| 157 | ((block[1] & 0xe0) >> 5) + '@'; |
| 158 | manufacturer[2] = (block[1] & 0x1f) + '@'; |
| 159 | manufacturer[3] = 0; |
| 160 | model = block[2] + (block[3] << 8); |
| 161 | |
| 162 | for (i = 0; i < ARRAY_SIZE(brokendb); i++) { |
| 163 | if (!strncmp(manufacturer, brokendb[i].manufacturer, 4) && |
| 164 | brokendb[i].model == model) { |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 165 | fix = brokendb[i].fix; |
| 166 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | } |
| 168 | } |
| 169 | |
| 170 | switch (fix) { |
| 171 | case FBMON_FIX_HEADER: |
| 172 | for (i = 0; i < 8; i++) { |
Antonino A. Daplas | 33a9f64 | 2007-05-08 00:37:23 -0700 | [diff] [blame] | 173 | if (edid[i] != edid_v1_header[i]) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | ret = fix; |
Antonino A. Daplas | 33a9f64 | 2007-05-08 00:37:23 -0700 | [diff] [blame] | 175 | break; |
| 176 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | } |
| 178 | break; |
| 179 | case FBMON_FIX_INPUT: |
| 180 | b = edid + EDID_STRUCT_DISPLAY; |
| 181 | /* Only if display is GTF capable will |
| 182 | the input type be reset to analog */ |
| 183 | if (b[4] & 0x01 && b[0] & 0x80) |
| 184 | ret = fix; |
| 185 | break; |
Antonino A. Daplas | 33a9f64 | 2007-05-08 00:37:23 -0700 | [diff] [blame] | 186 | case FBMON_FIX_TIMINGS: |
| 187 | b = edid + DETAILED_TIMING_DESCRIPTIONS_START; |
| 188 | ret = fix; |
| 189 | |
| 190 | for (i = 0; i < 4; i++) { |
| 191 | if (edid_is_limits_block(b)) { |
| 192 | ret = 0; |
| 193 | break; |
| 194 | } |
| 195 | |
| 196 | b += DETAILED_TIMING_DESCRIPTION_SIZE; |
| 197 | } |
| 198 | |
| 199 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | } |
| 201 | |
Antonino A. Daplas | 33a9f64 | 2007-05-08 00:37:23 -0700 | [diff] [blame] | 202 | if (ret) |
| 203 | printk("fbmon: The EDID Block of " |
| 204 | "Manufacturer: %s Model: 0x%x is known to " |
| 205 | "be broken,\n", manufacturer, model); |
| 206 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | return ret; |
| 208 | } |
| 209 | |
| 210 | static void fix_edid(unsigned char *edid, int fix) |
| 211 | { |
Antonino A. Daplas | 33a9f64 | 2007-05-08 00:37:23 -0700 | [diff] [blame] | 212 | int i; |
| 213 | unsigned char *b, csum = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | |
| 215 | switch (fix) { |
| 216 | case FBMON_FIX_HEADER: |
| 217 | printk("fbmon: trying a header reconstruct\n"); |
| 218 | memcpy(edid, edid_v1_header, 8); |
| 219 | break; |
| 220 | case FBMON_FIX_INPUT: |
| 221 | printk("fbmon: trying to fix input type\n"); |
| 222 | b = edid + EDID_STRUCT_DISPLAY; |
| 223 | b[0] &= ~0x80; |
| 224 | edid[127] += 0x80; |
Antonino A. Daplas | 33a9f64 | 2007-05-08 00:37:23 -0700 | [diff] [blame] | 225 | break; |
| 226 | case FBMON_FIX_TIMINGS: |
| 227 | printk("fbmon: trying to fix monitor timings\n"); |
| 228 | b = edid + DETAILED_TIMING_DESCRIPTIONS_START; |
| 229 | for (i = 0; i < 4; i++) { |
| 230 | if (!(edid_is_serial_block(b) || |
| 231 | edid_is_ascii_block(b) || |
| 232 | edid_is_monitor_block(b) || |
| 233 | edid_is_timing_block(b))) { |
| 234 | b[0] = 0x00; |
| 235 | b[1] = 0x00; |
| 236 | b[2] = 0x00; |
| 237 | b[3] = 0xfd; |
| 238 | b[4] = 0x00; |
| 239 | b[5] = 60; /* vfmin */ |
| 240 | b[6] = 60; /* vfmax */ |
| 241 | b[7] = 30; /* hfmin */ |
| 242 | b[8] = 75; /* hfmax */ |
| 243 | b[9] = 17; /* pixclock - 170 MHz*/ |
| 244 | b[10] = 0; /* GTF */ |
| 245 | break; |
| 246 | } |
| 247 | |
| 248 | b += DETAILED_TIMING_DESCRIPTION_SIZE; |
| 249 | } |
| 250 | |
| 251 | for (i = 0; i < EDID_LENGTH - 1; i++) |
| 252 | csum += edid[i]; |
| 253 | |
| 254 | edid[127] = 256 - csum; |
| 255 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | } |
| 257 | } |
| 258 | |
| 259 | static int edid_checksum(unsigned char *edid) |
| 260 | { |
Linus Torvalds | 3730793 | 2009-07-22 08:49:22 -0700 | [diff] [blame] | 261 | unsigned char csum = 0, all_null = 0; |
| 262 | int i, err = 0, fix = check_edid(edid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | |
| 264 | if (fix) |
| 265 | fix_edid(edid, fix); |
| 266 | |
| 267 | for (i = 0; i < EDID_LENGTH; i++) { |
| 268 | csum += edid[i]; |
| 269 | all_null |= edid[i]; |
| 270 | } |
| 271 | |
| 272 | if (csum == 0x00 && all_null) { |
| 273 | /* checksum passed, everything's good */ |
| 274 | err = 1; |
| 275 | } |
| 276 | |
| 277 | return err; |
| 278 | } |
| 279 | |
| 280 | static int edid_check_header(unsigned char *edid) |
| 281 | { |
| 282 | int i, err = 1, fix = check_edid(edid); |
| 283 | |
| 284 | if (fix) |
| 285 | fix_edid(edid, fix); |
| 286 | |
| 287 | for (i = 0; i < 8; i++) { |
| 288 | if (edid[i] != edid_v1_header[i]) |
| 289 | err = 0; |
| 290 | } |
| 291 | |
| 292 | return err; |
| 293 | } |
| 294 | |
| 295 | static void parse_vendor_block(unsigned char *block, struct fb_monspecs *specs) |
| 296 | { |
| 297 | specs->manufacturer[0] = ((block[0] & 0x7c) >> 2) + '@'; |
| 298 | specs->manufacturer[1] = ((block[0] & 0x03) << 3) + |
| 299 | ((block[1] & 0xe0) >> 5) + '@'; |
| 300 | specs->manufacturer[2] = (block[1] & 0x1f) + '@'; |
| 301 | specs->manufacturer[3] = 0; |
| 302 | specs->model = block[2] + (block[3] << 8); |
| 303 | specs->serial = block[4] + (block[5] << 8) + |
| 304 | (block[6] << 16) + (block[7] << 24); |
| 305 | specs->year = block[9] + 1990; |
| 306 | specs->week = block[8]; |
| 307 | DPRINTK(" Manufacturer: %s\n", specs->manufacturer); |
| 308 | DPRINTK(" Model: %x\n", specs->model); |
| 309 | DPRINTK(" Serial#: %u\n", specs->serial); |
| 310 | DPRINTK(" Year: %u Week %u\n", specs->year, specs->week); |
| 311 | } |
| 312 | |
| 313 | static void get_dpms_capabilities(unsigned char flags, |
| 314 | struct fb_monspecs *specs) |
| 315 | { |
| 316 | specs->dpms = 0; |
| 317 | if (flags & DPMS_ACTIVE_OFF) |
| 318 | specs->dpms |= FB_DPMS_ACTIVE_OFF; |
| 319 | if (flags & DPMS_SUSPEND) |
| 320 | specs->dpms |= FB_DPMS_SUSPEND; |
| 321 | if (flags & DPMS_STANDBY) |
| 322 | specs->dpms |= FB_DPMS_STANDBY; |
| 323 | DPRINTK(" DPMS: Active %s, Suspend %s, Standby %s\n", |
| 324 | (flags & DPMS_ACTIVE_OFF) ? "yes" : "no", |
| 325 | (flags & DPMS_SUSPEND) ? "yes" : "no", |
| 326 | (flags & DPMS_STANDBY) ? "yes" : "no"); |
| 327 | } |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 328 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | static void get_chroma(unsigned char *block, struct fb_monspecs *specs) |
| 330 | { |
| 331 | int tmp; |
| 332 | |
| 333 | DPRINTK(" Chroma\n"); |
| 334 | /* Chromaticity data */ |
| 335 | tmp = ((block[5] & (3 << 6)) >> 6) | (block[0x7] << 2); |
| 336 | tmp *= 1000; |
| 337 | tmp += 512; |
| 338 | specs->chroma.redx = tmp/1024; |
| 339 | DPRINTK(" RedX: 0.%03d ", specs->chroma.redx); |
| 340 | |
| 341 | tmp = ((block[5] & (3 << 4)) >> 4) | (block[0x8] << 2); |
| 342 | tmp *= 1000; |
| 343 | tmp += 512; |
| 344 | specs->chroma.redy = tmp/1024; |
| 345 | DPRINTK("RedY: 0.%03d\n", specs->chroma.redy); |
| 346 | |
| 347 | tmp = ((block[5] & (3 << 2)) >> 2) | (block[0x9] << 2); |
| 348 | tmp *= 1000; |
| 349 | tmp += 512; |
| 350 | specs->chroma.greenx = tmp/1024; |
| 351 | DPRINTK(" GreenX: 0.%03d ", specs->chroma.greenx); |
| 352 | |
| 353 | tmp = (block[5] & 3) | (block[0xa] << 2); |
| 354 | tmp *= 1000; |
| 355 | tmp += 512; |
| 356 | specs->chroma.greeny = tmp/1024; |
| 357 | DPRINTK("GreenY: 0.%03d\n", specs->chroma.greeny); |
| 358 | |
| 359 | tmp = ((block[6] & (3 << 6)) >> 6) | (block[0xb] << 2); |
| 360 | tmp *= 1000; |
| 361 | tmp += 512; |
| 362 | specs->chroma.bluex = tmp/1024; |
| 363 | DPRINTK(" BlueX: 0.%03d ", specs->chroma.bluex); |
| 364 | |
| 365 | tmp = ((block[6] & (3 << 4)) >> 4) | (block[0xc] << 2); |
| 366 | tmp *= 1000; |
| 367 | tmp += 512; |
| 368 | specs->chroma.bluey = tmp/1024; |
| 369 | DPRINTK("BlueY: 0.%03d\n", specs->chroma.bluey); |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 370 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | tmp = ((block[6] & (3 << 2)) >> 2) | (block[0xd] << 2); |
| 372 | tmp *= 1000; |
| 373 | tmp += 512; |
| 374 | specs->chroma.whitex = tmp/1024; |
| 375 | DPRINTK(" WhiteX: 0.%03d ", specs->chroma.whitex); |
| 376 | |
| 377 | tmp = (block[6] & 3) | (block[0xe] << 2); |
| 378 | tmp *= 1000; |
| 379 | tmp += 512; |
| 380 | specs->chroma.whitey = tmp/1024; |
| 381 | DPRINTK("WhiteY: 0.%03d\n", specs->chroma.whitey); |
| 382 | } |
| 383 | |
Antonino A. Daplas | 61ab790 | 2005-09-09 13:10:02 -0700 | [diff] [blame] | 384 | static void calc_mode_timings(int xres, int yres, int refresh, |
| 385 | struct fb_videomode *mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | { |
Antonino A. Daplas | af5d0f7 | 2006-01-09 20:53:38 -0800 | [diff] [blame] | 387 | struct fb_var_screeninfo *var; |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 388 | |
Antonino A. Daplas | af5d0f7 | 2006-01-09 20:53:38 -0800 | [diff] [blame] | 389 | var = kzalloc(sizeof(struct fb_var_screeninfo), GFP_KERNEL); |
| 390 | |
| 391 | if (var) { |
| 392 | var->xres = xres; |
| 393 | var->yres = yres; |
| 394 | fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, |
| 395 | refresh, var, NULL); |
| 396 | mode->xres = xres; |
| 397 | mode->yres = yres; |
| 398 | mode->pixclock = var->pixclock; |
| 399 | mode->refresh = refresh; |
| 400 | mode->left_margin = var->left_margin; |
| 401 | mode->right_margin = var->right_margin; |
| 402 | mode->upper_margin = var->upper_margin; |
| 403 | mode->lower_margin = var->lower_margin; |
| 404 | mode->hsync_len = var->hsync_len; |
| 405 | mode->vsync_len = var->vsync_len; |
| 406 | mode->vmode = 0; |
| 407 | mode->sync = 0; |
| 408 | kfree(var); |
| 409 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | } |
| 411 | |
| 412 | static int get_est_timing(unsigned char *block, struct fb_videomode *mode) |
| 413 | { |
| 414 | int num = 0; |
| 415 | unsigned char c; |
| 416 | |
| 417 | c = block[0]; |
| 418 | if (c&0x80) { |
| 419 | calc_mode_timings(720, 400, 70, &mode[num]); |
| 420 | mode[num++].flag = FB_MODE_IS_CALCULATED; |
| 421 | DPRINTK(" 720x400@70Hz\n"); |
| 422 | } |
| 423 | if (c&0x40) { |
| 424 | calc_mode_timings(720, 400, 88, &mode[num]); |
| 425 | mode[num++].flag = FB_MODE_IS_CALCULATED; |
| 426 | DPRINTK(" 720x400@88Hz\n"); |
| 427 | } |
| 428 | if (c&0x20) { |
| 429 | mode[num++] = vesa_modes[3]; |
| 430 | DPRINTK(" 640x480@60Hz\n"); |
| 431 | } |
| 432 | if (c&0x10) { |
| 433 | calc_mode_timings(640, 480, 67, &mode[num]); |
| 434 | mode[num++].flag = FB_MODE_IS_CALCULATED; |
| 435 | DPRINTK(" 640x480@67Hz\n"); |
| 436 | } |
| 437 | if (c&0x08) { |
| 438 | mode[num++] = vesa_modes[4]; |
| 439 | DPRINTK(" 640x480@72Hz\n"); |
| 440 | } |
| 441 | if (c&0x04) { |
| 442 | mode[num++] = vesa_modes[5]; |
| 443 | DPRINTK(" 640x480@75Hz\n"); |
| 444 | } |
| 445 | if (c&0x02) { |
| 446 | mode[num++] = vesa_modes[7]; |
| 447 | DPRINTK(" 800x600@56Hz\n"); |
| 448 | } |
| 449 | if (c&0x01) { |
| 450 | mode[num++] = vesa_modes[8]; |
| 451 | DPRINTK(" 800x600@60Hz\n"); |
| 452 | } |
| 453 | |
| 454 | c = block[1]; |
| 455 | if (c&0x80) { |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 456 | mode[num++] = vesa_modes[9]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | DPRINTK(" 800x600@72Hz\n"); |
| 458 | } |
| 459 | if (c&0x40) { |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 460 | mode[num++] = vesa_modes[10]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | DPRINTK(" 800x600@75Hz\n"); |
| 462 | } |
| 463 | if (c&0x20) { |
| 464 | calc_mode_timings(832, 624, 75, &mode[num]); |
| 465 | mode[num++].flag = FB_MODE_IS_CALCULATED; |
| 466 | DPRINTK(" 832x624@75Hz\n"); |
| 467 | } |
| 468 | if (c&0x10) { |
| 469 | mode[num++] = vesa_modes[12]; |
| 470 | DPRINTK(" 1024x768@87Hz Interlaced\n"); |
| 471 | } |
| 472 | if (c&0x08) { |
| 473 | mode[num++] = vesa_modes[13]; |
| 474 | DPRINTK(" 1024x768@60Hz\n"); |
| 475 | } |
| 476 | if (c&0x04) { |
| 477 | mode[num++] = vesa_modes[14]; |
| 478 | DPRINTK(" 1024x768@70Hz\n"); |
| 479 | } |
| 480 | if (c&0x02) { |
| 481 | mode[num++] = vesa_modes[15]; |
| 482 | DPRINTK(" 1024x768@75Hz\n"); |
| 483 | } |
| 484 | if (c&0x01) { |
| 485 | mode[num++] = vesa_modes[21]; |
| 486 | DPRINTK(" 1280x1024@75Hz\n"); |
| 487 | } |
| 488 | c = block[2]; |
| 489 | if (c&0x80) { |
| 490 | mode[num++] = vesa_modes[17]; |
| 491 | DPRINTK(" 1152x870@75Hz\n"); |
| 492 | } |
| 493 | DPRINTK(" Manufacturer's mask: %x\n",c&0x7F); |
| 494 | return num; |
| 495 | } |
| 496 | |
Tomi Valkeinen | 43dcd13 | 2011-08-25 15:36:40 +0300 | [diff] [blame] | 497 | static int get_std_timing(unsigned char *block, struct fb_videomode *mode, |
| 498 | int ver, int rev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | { |
| 500 | int xres, yres = 0, refresh, ratio, i; |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 501 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | xres = (block[0] + 31) * 8; |
| 503 | if (xres <= 256) |
| 504 | return 0; |
| 505 | |
| 506 | ratio = (block[1] & 0xc0) >> 6; |
| 507 | switch (ratio) { |
| 508 | case 0: |
Tomi Valkeinen | 43dcd13 | 2011-08-25 15:36:40 +0300 | [diff] [blame] | 509 | /* in EDID 1.3 the meaning of 0 changed to 16:10 (prior 1:1) */ |
| 510 | if (ver < 1 || (ver == 1 && rev < 3)) |
| 511 | yres = xres; |
| 512 | else |
| 513 | yres = (xres * 10)/16; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | break; |
| 515 | case 1: |
| 516 | yres = (xres * 3)/4; |
| 517 | break; |
| 518 | case 2: |
| 519 | yres = (xres * 4)/5; |
| 520 | break; |
| 521 | case 3: |
| 522 | yres = (xres * 9)/16; |
| 523 | break; |
| 524 | } |
| 525 | refresh = (block[1] & 0x3f) + 60; |
| 526 | |
| 527 | DPRINTK(" %dx%d@%dHz\n", xres, yres, refresh); |
| 528 | for (i = 0; i < VESA_MODEDB_SIZE; i++) { |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 529 | if (vesa_modes[i].xres == xres && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | vesa_modes[i].yres == yres && |
| 531 | vesa_modes[i].refresh == refresh) { |
| 532 | *mode = vesa_modes[i]; |
| 533 | mode->flag |= FB_MODE_IS_STANDARD; |
| 534 | return 1; |
| 535 | } |
| 536 | } |
| 537 | calc_mode_timings(xres, yres, refresh, mode); |
| 538 | return 1; |
| 539 | } |
| 540 | |
| 541 | static int get_dst_timing(unsigned char *block, |
Tomi Valkeinen | 43dcd13 | 2011-08-25 15:36:40 +0300 | [diff] [blame] | 542 | struct fb_videomode *mode, int ver, int rev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | { |
| 544 | int j, num = 0; |
| 545 | |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 546 | for (j = 0; j < 6; j++, block += STD_TIMING_DESCRIPTION_SIZE) |
Tomi Valkeinen | 43dcd13 | 2011-08-25 15:36:40 +0300 | [diff] [blame] | 547 | num += get_std_timing(block, &mode[num], ver, rev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | |
| 549 | return num; |
| 550 | } |
| 551 | |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 552 | static void get_detailed_timing(unsigned char *block, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | struct fb_videomode *mode) |
| 554 | { |
| 555 | mode->xres = H_ACTIVE; |
| 556 | mode->yres = V_ACTIVE; |
| 557 | mode->pixclock = PIXEL_CLOCK; |
| 558 | mode->pixclock /= 1000; |
| 559 | mode->pixclock = KHZ2PICOS(mode->pixclock); |
| 560 | mode->right_margin = H_SYNC_OFFSET; |
| 561 | mode->left_margin = (H_ACTIVE + H_BLANKING) - |
| 562 | (H_ACTIVE + H_SYNC_OFFSET + H_SYNC_WIDTH); |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 563 | mode->upper_margin = V_BLANKING - V_SYNC_OFFSET - |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | V_SYNC_WIDTH; |
| 565 | mode->lower_margin = V_SYNC_OFFSET; |
| 566 | mode->hsync_len = H_SYNC_WIDTH; |
| 567 | mode->vsync_len = V_SYNC_WIDTH; |
| 568 | if (HSYNC_POSITIVE) |
| 569 | mode->sync |= FB_SYNC_HOR_HIGH_ACT; |
| 570 | if (VSYNC_POSITIVE) |
| 571 | mode->sync |= FB_SYNC_VERT_HIGH_ACT; |
| 572 | mode->refresh = PIXEL_CLOCK/((H_ACTIVE + H_BLANKING) * |
| 573 | (V_ACTIVE + V_BLANKING)); |
Jon Dufresne | 1a3b09d | 2008-10-15 22:03:49 -0700 | [diff] [blame] | 574 | if (INTERLACED) { |
| 575 | mode->yres *= 2; |
| 576 | mode->upper_margin *= 2; |
| 577 | mode->lower_margin *= 2; |
| 578 | mode->vsync_len *= 2; |
| 579 | mode->vmode |= FB_VMODE_INTERLACED; |
| 580 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | mode->flag = FB_MODE_IS_DETAILED; |
| 582 | |
| 583 | DPRINTK(" %d MHz ", PIXEL_CLOCK/1000000); |
| 584 | DPRINTK("%d %d %d %d ", H_ACTIVE, H_ACTIVE + H_SYNC_OFFSET, |
| 585 | H_ACTIVE + H_SYNC_OFFSET + H_SYNC_WIDTH, H_ACTIVE + H_BLANKING); |
| 586 | DPRINTK("%d %d %d %d ", V_ACTIVE, V_ACTIVE + V_SYNC_OFFSET, |
| 587 | V_ACTIVE + V_SYNC_OFFSET + V_SYNC_WIDTH, V_ACTIVE + V_BLANKING); |
| 588 | DPRINTK("%sHSync %sVSync\n\n", (HSYNC_POSITIVE) ? "+" : "-", |
| 589 | (VSYNC_POSITIVE) ? "+" : "-"); |
| 590 | } |
| 591 | |
| 592 | /** |
| 593 | * fb_create_modedb - create video mode database |
| 594 | * @edid: EDID data |
| 595 | * @dbsize: database size |
| 596 | * |
| 597 | * RETURNS: struct fb_videomode, @dbsize contains length of database |
| 598 | * |
| 599 | * DESCRIPTION: |
| 600 | * This function builds a mode database using the contents of the EDID |
| 601 | * data |
| 602 | */ |
| 603 | static struct fb_videomode *fb_create_modedb(unsigned char *edid, int *dbsize) |
| 604 | { |
| 605 | struct fb_videomode *mode, *m; |
| 606 | unsigned char *block; |
Geert Uytterhoeven | 5a258d0 | 2007-10-16 01:28:52 -0700 | [diff] [blame] | 607 | int num = 0, i, first = 1; |
Tomi Valkeinen | 43dcd13 | 2011-08-25 15:36:40 +0300 | [diff] [blame] | 608 | int ver, rev; |
| 609 | |
| 610 | ver = edid[EDID_STRUCT_VERSION]; |
| 611 | rev = edid[EDID_STRUCT_REVISION]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | |
Antonino A. Daplas | def1ede | 2006-01-09 20:53:45 -0800 | [diff] [blame] | 613 | mode = kzalloc(50 * sizeof(struct fb_videomode), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | if (mode == NULL) |
| 615 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 617 | if (edid == NULL || !edid_checksum(edid) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | !edid_check_header(edid)) { |
| 619 | kfree(mode); |
| 620 | return NULL; |
| 621 | } |
| 622 | |
| 623 | *dbsize = 0; |
| 624 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | DPRINTK(" Detailed Timings\n"); |
| 626 | block = edid + DETAILED_TIMING_DESCRIPTIONS_START; |
| 627 | for (i = 0; i < 4; i++, block+= DETAILED_TIMING_DESCRIPTION_SIZE) { |
Antonino A. Daplas | 14c8102 | 2005-11-07 01:00:53 -0800 | [diff] [blame] | 628 | if (!(block[0] == 0x00 && block[1] == 0x00)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | get_detailed_timing(block, &mode[num]); |
| 630 | if (first) { |
| 631 | mode[num].flag |= FB_MODE_IS_FIRST; |
| 632 | first = 0; |
| 633 | } |
| 634 | num++; |
| 635 | } |
| 636 | } |
Antonino A. Daplas | 14c8102 | 2005-11-07 01:00:53 -0800 | [diff] [blame] | 637 | |
| 638 | DPRINTK(" Supported VESA Modes\n"); |
| 639 | block = edid + ESTABLISHED_TIMING_1; |
| 640 | num += get_est_timing(block, &mode[num]); |
| 641 | |
| 642 | DPRINTK(" Standard Timings\n"); |
| 643 | block = edid + STD_TIMING_DESCRIPTIONS_START; |
| 644 | for (i = 0; i < STD_TIMING; i++, block += STD_TIMING_DESCRIPTION_SIZE) |
Tomi Valkeinen | 43dcd13 | 2011-08-25 15:36:40 +0300 | [diff] [blame] | 645 | num += get_std_timing(block, &mode[num], ver, rev); |
Antonino A. Daplas | 14c8102 | 2005-11-07 01:00:53 -0800 | [diff] [blame] | 646 | |
| 647 | block = edid + DETAILED_TIMING_DESCRIPTIONS_START; |
| 648 | for (i = 0; i < 4; i++, block+= DETAILED_TIMING_DESCRIPTION_SIZE) { |
| 649 | if (block[0] == 0x00 && block[1] == 0x00 && block[3] == 0xfa) |
Tomi Valkeinen | 43dcd13 | 2011-08-25 15:36:40 +0300 | [diff] [blame] | 650 | num += get_dst_timing(block + 5, &mode[num], ver, rev); |
Antonino A. Daplas | 14c8102 | 2005-11-07 01:00:53 -0800 | [diff] [blame] | 651 | } |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 652 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | /* Yikes, EDID data is totally useless */ |
| 654 | if (!num) { |
| 655 | kfree(mode); |
| 656 | return NULL; |
| 657 | } |
| 658 | |
| 659 | *dbsize = num; |
| 660 | m = kmalloc(num * sizeof(struct fb_videomode), GFP_KERNEL); |
| 661 | if (!m) |
| 662 | return mode; |
| 663 | memmove(m, mode, num * sizeof(struct fb_videomode)); |
| 664 | kfree(mode); |
| 665 | return m; |
| 666 | } |
| 667 | |
| 668 | /** |
| 669 | * fb_destroy_modedb - destroys mode database |
| 670 | * @modedb: mode database to destroy |
| 671 | * |
| 672 | * DESCRIPTION: |
| 673 | * Destroy mode database created by fb_create_modedb |
| 674 | */ |
| 675 | void fb_destroy_modedb(struct fb_videomode *modedb) |
| 676 | { |
| 677 | kfree(modedb); |
| 678 | } |
| 679 | |
| 680 | static int fb_get_monitor_limits(unsigned char *edid, struct fb_monspecs *specs) |
| 681 | { |
| 682 | int i, retval = 1; |
| 683 | unsigned char *block; |
| 684 | |
| 685 | block = edid + DETAILED_TIMING_DESCRIPTIONS_START; |
| 686 | |
| 687 | DPRINTK(" Monitor Operating Limits: "); |
Antonino A. Daplas | 3007683 | 2006-06-26 00:26:29 -0700 | [diff] [blame] | 688 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | for (i = 0; i < 4; i++, block += DETAILED_TIMING_DESCRIPTION_SIZE) { |
| 690 | if (edid_is_limits_block(block)) { |
| 691 | specs->hfmin = H_MIN_RATE * 1000; |
| 692 | specs->hfmax = H_MAX_RATE * 1000; |
| 693 | specs->vfmin = V_MIN_RATE; |
| 694 | specs->vfmax = V_MAX_RATE; |
| 695 | specs->dclkmax = MAX_PIXEL_CLOCK * 1000000; |
| 696 | specs->gtf = (GTF_SUPPORT) ? 1 : 0; |
| 697 | retval = 0; |
| 698 | DPRINTK("From EDID\n"); |
| 699 | break; |
| 700 | } |
| 701 | } |
Antonino A. Daplas | 3007683 | 2006-06-26 00:26:29 -0700 | [diff] [blame] | 702 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | /* estimate monitor limits based on modes supported */ |
| 704 | if (retval) { |
Antonino A. Daplas | 3007683 | 2006-06-26 00:26:29 -0700 | [diff] [blame] | 705 | struct fb_videomode *modes, *mode; |
Andre Haupt | cb85063 | 2008-02-06 01:39:09 -0800 | [diff] [blame] | 706 | int num_modes, hz, hscan, pixclock; |
Antonino A. Daplas | 3007683 | 2006-06-26 00:26:29 -0700 | [diff] [blame] | 707 | int vtotal, htotal; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | |
| 709 | modes = fb_create_modedb(edid, &num_modes); |
| 710 | if (!modes) { |
| 711 | DPRINTK("None Available\n"); |
| 712 | return 1; |
| 713 | } |
| 714 | |
| 715 | retval = 0; |
| 716 | for (i = 0; i < num_modes; i++) { |
Antonino A. Daplas | 3007683 | 2006-06-26 00:26:29 -0700 | [diff] [blame] | 717 | mode = &modes[i]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | pixclock = PICOS2KHZ(modes[i].pixclock) * 1000; |
Antonino A. Daplas | 3007683 | 2006-06-26 00:26:29 -0700 | [diff] [blame] | 719 | htotal = mode->xres + mode->right_margin + mode->hsync_len |
| 720 | + mode->left_margin; |
| 721 | vtotal = mode->yres + mode->lower_margin + mode->vsync_len |
| 722 | + mode->upper_margin; |
| 723 | |
| 724 | if (mode->vmode & FB_VMODE_INTERLACED) |
| 725 | vtotal /= 2; |
| 726 | |
| 727 | if (mode->vmode & FB_VMODE_DOUBLE) |
| 728 | vtotal *= 2; |
| 729 | |
| 730 | hscan = (pixclock + htotal / 2) / htotal; |
| 731 | hscan = (hscan + 500) / 1000 * 1000; |
| 732 | hz = (hscan + vtotal / 2) / vtotal; |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 733 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | if (specs->dclkmax == 0 || specs->dclkmax < pixclock) |
| 735 | specs->dclkmax = pixclock; |
Antonino A. Daplas | 3007683 | 2006-06-26 00:26:29 -0700 | [diff] [blame] | 736 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | if (specs->dclkmin == 0 || specs->dclkmin > pixclock) |
| 738 | specs->dclkmin = pixclock; |
Antonino A. Daplas | 3007683 | 2006-06-26 00:26:29 -0700 | [diff] [blame] | 739 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | if (specs->hfmax == 0 || specs->hfmax < hscan) |
| 741 | specs->hfmax = hscan; |
Antonino A. Daplas | 3007683 | 2006-06-26 00:26:29 -0700 | [diff] [blame] | 742 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | if (specs->hfmin == 0 || specs->hfmin > hscan) |
| 744 | specs->hfmin = hscan; |
Antonino A. Daplas | 3007683 | 2006-06-26 00:26:29 -0700 | [diff] [blame] | 745 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | if (specs->vfmax == 0 || specs->vfmax < hz) |
| 747 | specs->vfmax = hz; |
Antonino A. Daplas | 3007683 | 2006-06-26 00:26:29 -0700 | [diff] [blame] | 748 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | if (specs->vfmin == 0 || specs->vfmin > hz) |
| 750 | specs->vfmin = hz; |
| 751 | } |
| 752 | DPRINTK("Extrapolated\n"); |
| 753 | fb_destroy_modedb(modes); |
| 754 | } |
| 755 | DPRINTK(" H: %d-%dKHz V: %d-%dHz DCLK: %dMHz\n", |
| 756 | specs->hfmin/1000, specs->hfmax/1000, specs->vfmin, |
| 757 | specs->vfmax, specs->dclkmax/1000000); |
| 758 | return retval; |
| 759 | } |
| 760 | |
| 761 | static void get_monspecs(unsigned char *edid, struct fb_monspecs *specs) |
| 762 | { |
| 763 | unsigned char c, *block; |
| 764 | |
| 765 | block = edid + EDID_STRUCT_DISPLAY; |
| 766 | |
| 767 | fb_get_monitor_limits(edid, specs); |
| 768 | |
| 769 | c = block[0] & 0x80; |
| 770 | specs->input = 0; |
| 771 | if (c) { |
| 772 | specs->input |= FB_DISP_DDI; |
| 773 | DPRINTK(" Digital Display Input"); |
| 774 | } else { |
| 775 | DPRINTK(" Analog Display Input: Input Voltage - "); |
| 776 | switch ((block[0] & 0x60) >> 5) { |
| 777 | case 0: |
| 778 | DPRINTK("0.700V/0.300V"); |
| 779 | specs->input |= FB_DISP_ANA_700_300; |
| 780 | break; |
| 781 | case 1: |
| 782 | DPRINTK("0.714V/0.286V"); |
| 783 | specs->input |= FB_DISP_ANA_714_286; |
| 784 | break; |
| 785 | case 2: |
| 786 | DPRINTK("1.000V/0.400V"); |
| 787 | specs->input |= FB_DISP_ANA_1000_400; |
| 788 | break; |
| 789 | case 3: |
| 790 | DPRINTK("0.700V/0.000V"); |
| 791 | specs->input |= FB_DISP_ANA_700_000; |
| 792 | break; |
| 793 | } |
| 794 | } |
| 795 | DPRINTK("\n Sync: "); |
| 796 | c = block[0] & 0x10; |
| 797 | if (c) |
| 798 | DPRINTK(" Configurable signal level\n"); |
| 799 | c = block[0] & 0x0f; |
| 800 | specs->signal = 0; |
| 801 | if (c & 0x10) { |
| 802 | DPRINTK("Blank to Blank "); |
| 803 | specs->signal |= FB_SIGNAL_BLANK_BLANK; |
| 804 | } |
| 805 | if (c & 0x08) { |
| 806 | DPRINTK("Separate "); |
| 807 | specs->signal |= FB_SIGNAL_SEPARATE; |
| 808 | } |
| 809 | if (c & 0x04) { |
| 810 | DPRINTK("Composite "); |
| 811 | specs->signal |= FB_SIGNAL_COMPOSITE; |
| 812 | } |
| 813 | if (c & 0x02) { |
| 814 | DPRINTK("Sync on Green "); |
| 815 | specs->signal |= FB_SIGNAL_SYNC_ON_GREEN; |
| 816 | } |
| 817 | if (c & 0x01) { |
| 818 | DPRINTK("Serration on "); |
| 819 | specs->signal |= FB_SIGNAL_SERRATION_ON; |
| 820 | } |
| 821 | DPRINTK("\n"); |
| 822 | specs->max_x = block[1]; |
| 823 | specs->max_y = block[2]; |
| 824 | DPRINTK(" Max H-size in cm: "); |
| 825 | if (specs->max_x) |
| 826 | DPRINTK("%d\n", specs->max_x); |
| 827 | else |
| 828 | DPRINTK("variable\n"); |
| 829 | DPRINTK(" Max V-size in cm: "); |
| 830 | if (specs->max_y) |
| 831 | DPRINTK("%d\n", specs->max_y); |
| 832 | else |
| 833 | DPRINTK("variable\n"); |
| 834 | |
| 835 | c = block[3]; |
| 836 | specs->gamma = c+100; |
| 837 | DPRINTK(" Gamma: "); |
| 838 | DPRINTK("%d.%d\n", specs->gamma/100, specs->gamma % 100); |
| 839 | |
| 840 | get_dpms_capabilities(block[4], specs); |
| 841 | |
| 842 | switch ((block[4] & 0x18) >> 3) { |
| 843 | case 0: |
| 844 | DPRINTK(" Monochrome/Grayscale\n"); |
| 845 | specs->input |= FB_DISP_MONO; |
| 846 | break; |
| 847 | case 1: |
| 848 | DPRINTK(" RGB Color Display\n"); |
| 849 | specs->input |= FB_DISP_RGB; |
| 850 | break; |
| 851 | case 2: |
| 852 | DPRINTK(" Non-RGB Multicolor Display\n"); |
| 853 | specs->input |= FB_DISP_MULTI; |
| 854 | break; |
| 855 | default: |
| 856 | DPRINTK(" Unknown\n"); |
| 857 | specs->input |= FB_DISP_UNKNOWN; |
| 858 | break; |
| 859 | } |
| 860 | |
| 861 | get_chroma(block, specs); |
| 862 | |
| 863 | specs->misc = 0; |
| 864 | c = block[4] & 0x7; |
| 865 | if (c & 0x04) { |
| 866 | DPRINTK(" Default color format is primary\n"); |
| 867 | specs->misc |= FB_MISC_PRIM_COLOR; |
| 868 | } |
| 869 | if (c & 0x02) { |
| 870 | DPRINTK(" First DETAILED Timing is preferred\n"); |
| 871 | specs->misc |= FB_MISC_1ST_DETAIL; |
| 872 | } |
| 873 | if (c & 0x01) { |
| 874 | printk(" Display is GTF capable\n"); |
| 875 | specs->gtf = 1; |
| 876 | } |
| 877 | } |
| 878 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var) |
| 880 | { |
| 881 | int i; |
| 882 | unsigned char *block; |
| 883 | |
| 884 | if (edid == NULL || var == NULL) |
| 885 | return 1; |
| 886 | |
| 887 | if (!(edid_checksum(edid))) |
| 888 | return 1; |
| 889 | |
| 890 | if (!(edid_check_header(edid))) |
| 891 | return 1; |
| 892 | |
| 893 | block = edid + DETAILED_TIMING_DESCRIPTIONS_START; |
| 894 | |
| 895 | for (i = 0; i < 4; i++, block += DETAILED_TIMING_DESCRIPTION_SIZE) { |
| 896 | if (edid_is_timing_block(block)) { |
| 897 | var->xres = var->xres_virtual = H_ACTIVE; |
| 898 | var->yres = var->yres_virtual = V_ACTIVE; |
Ville Syrjala | 43a3abc | 2008-07-23 21:31:27 -0700 | [diff] [blame] | 899 | var->height = var->width = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | var->right_margin = H_SYNC_OFFSET; |
| 901 | var->left_margin = (H_ACTIVE + H_BLANKING) - |
| 902 | (H_ACTIVE + H_SYNC_OFFSET + H_SYNC_WIDTH); |
| 903 | var->upper_margin = V_BLANKING - V_SYNC_OFFSET - |
| 904 | V_SYNC_WIDTH; |
| 905 | var->lower_margin = V_SYNC_OFFSET; |
| 906 | var->hsync_len = H_SYNC_WIDTH; |
| 907 | var->vsync_len = V_SYNC_WIDTH; |
| 908 | var->pixclock = PIXEL_CLOCK; |
| 909 | var->pixclock /= 1000; |
| 910 | var->pixclock = KHZ2PICOS(var->pixclock); |
| 911 | |
| 912 | if (HSYNC_POSITIVE) |
| 913 | var->sync |= FB_SYNC_HOR_HIGH_ACT; |
| 914 | if (VSYNC_POSITIVE) |
| 915 | var->sync |= FB_SYNC_VERT_HIGH_ACT; |
| 916 | return 0; |
| 917 | } |
| 918 | } |
| 919 | return 1; |
| 920 | } |
| 921 | |
| 922 | void fb_edid_to_monspecs(unsigned char *edid, struct fb_monspecs *specs) |
| 923 | { |
| 924 | unsigned char *block; |
Antonino A. Daplas | 475666d | 2005-11-07 01:00:46 -0800 | [diff] [blame] | 925 | int i, found = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 926 | |
| 927 | if (edid == NULL) |
| 928 | return; |
| 929 | |
| 930 | if (!(edid_checksum(edid))) |
| 931 | return; |
| 932 | |
| 933 | if (!(edid_check_header(edid))) |
| 934 | return; |
| 935 | |
| 936 | memset(specs, 0, sizeof(struct fb_monspecs)); |
| 937 | |
| 938 | specs->version = edid[EDID_STRUCT_VERSION]; |
| 939 | specs->revision = edid[EDID_STRUCT_REVISION]; |
| 940 | |
| 941 | DPRINTK("========================================\n"); |
| 942 | DPRINTK("Display Information (EDID)\n"); |
| 943 | DPRINTK("========================================\n"); |
| 944 | DPRINTK(" EDID Version %d.%d\n", (int) specs->version, |
| 945 | (int) specs->revision); |
| 946 | |
| 947 | parse_vendor_block(edid + ID_MANUFACTURER_NAME, specs); |
| 948 | |
| 949 | block = edid + DETAILED_TIMING_DESCRIPTIONS_START; |
| 950 | for (i = 0; i < 4; i++, block += DETAILED_TIMING_DESCRIPTION_SIZE) { |
| 951 | if (edid_is_serial_block(block)) { |
| 952 | copy_string(block, specs->serial_no); |
| 953 | DPRINTK(" Serial Number: %s\n", specs->serial_no); |
| 954 | } else if (edid_is_ascii_block(block)) { |
| 955 | copy_string(block, specs->ascii); |
| 956 | DPRINTK(" ASCII Block: %s\n", specs->ascii); |
| 957 | } else if (edid_is_monitor_block(block)) { |
| 958 | copy_string(block, specs->monitor); |
| 959 | DPRINTK(" Monitor Name: %s\n", specs->monitor); |
| 960 | } |
| 961 | } |
| 962 | |
| 963 | DPRINTK(" Display Characteristics:\n"); |
| 964 | get_monspecs(edid, specs); |
| 965 | |
| 966 | specs->modedb = fb_create_modedb(edid, &specs->modedb_len); |
Antonino A. Daplas | 475666d | 2005-11-07 01:00:46 -0800 | [diff] [blame] | 967 | |
| 968 | /* |
| 969 | * Workaround for buggy EDIDs that sets that the first |
| 970 | * detailed timing is preferred but has not detailed |
| 971 | * timing specified |
| 972 | */ |
| 973 | for (i = 0; i < specs->modedb_len; i++) { |
| 974 | if (specs->modedb[i].flag & FB_MODE_IS_DETAILED) { |
| 975 | found = 1; |
| 976 | break; |
| 977 | } |
| 978 | } |
| 979 | |
| 980 | if (!found) |
| 981 | specs->misc &= ~FB_MISC_1ST_DETAIL; |
| 982 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | DPRINTK("========================================\n"); |
| 984 | } |
| 985 | |
Guennadi Liakhovetski | e410511 | 2010-11-11 15:44:52 +0100 | [diff] [blame] | 986 | /** |
| 987 | * fb_edid_add_monspecs() - add monitor video modes from E-EDID data |
| 988 | * @edid: 128 byte array with an E-EDID block |
| 989 | * @spacs: monitor specs to be extended |
| 990 | */ |
Erik Gilling | 9fbbdde | 2010-11-11 15:44:43 +0100 | [diff] [blame] | 991 | void fb_edid_add_monspecs(unsigned char *edid, struct fb_monspecs *specs) |
| 992 | { |
| 993 | unsigned char *block; |
Guennadi Liakhovetski | e410511 | 2010-11-11 15:44:52 +0100 | [diff] [blame] | 994 | struct fb_videomode *m; |
| 995 | int num = 0, i; |
Guennadi Liakhovetski | 0ad83f6 | 2010-11-11 15:45:04 +0100 | [diff] [blame] | 996 | u8 svd[64], edt[(128 - 4) / DETAILED_TIMING_DESCRIPTION_SIZE]; |
| 997 | u8 pos = 4, svd_n = 0; |
Erik Gilling | 9fbbdde | 2010-11-11 15:44:43 +0100 | [diff] [blame] | 998 | |
Guennadi Liakhovetski | e410511 | 2010-11-11 15:44:52 +0100 | [diff] [blame] | 999 | if (!edid) |
Erik Gilling | 9fbbdde | 2010-11-11 15:44:43 +0100 | [diff] [blame] | 1000 | return; |
| 1001 | |
| 1002 | if (!edid_checksum(edid)) |
| 1003 | return; |
| 1004 | |
Guennadi Liakhovetski | e410511 | 2010-11-11 15:44:52 +0100 | [diff] [blame] | 1005 | if (edid[0] != 0x2 || |
| 1006 | edid[2] < 4 || edid[2] > 128 - DETAILED_TIMING_DESCRIPTION_SIZE) |
Erik Gilling | 9fbbdde | 2010-11-11 15:44:43 +0100 | [diff] [blame] | 1007 | return; |
| 1008 | |
Guennadi Liakhovetski | 0ad83f6 | 2010-11-11 15:45:04 +0100 | [diff] [blame] | 1009 | DPRINTK(" Short Video Descriptors\n"); |
| 1010 | |
| 1011 | while (pos < edid[2]) { |
| 1012 | u8 len = edid[pos] & 0x1f, type = (edid[pos] >> 5) & 7; |
| 1013 | pr_debug("Data block %u of %u bytes\n", type, len); |
| 1014 | if (type == 2) |
| 1015 | for (i = pos; i < pos + len; i++) { |
| 1016 | u8 idx = edid[pos + i] & 0x7f; |
| 1017 | svd[svd_n++] = idx; |
| 1018 | pr_debug("N%sative mode #%d\n", |
| 1019 | edid[pos + i] & 0x80 ? "" : "on-n", idx); |
| 1020 | } |
| 1021 | pos += len + 1; |
| 1022 | } |
| 1023 | |
Guennadi Liakhovetski | e410511 | 2010-11-11 15:44:52 +0100 | [diff] [blame] | 1024 | block = edid + edid[2]; |
Erik Gilling | 9fbbdde | 2010-11-11 15:44:43 +0100 | [diff] [blame] | 1025 | |
| 1026 | DPRINTK(" Extended Detailed Timings\n"); |
| 1027 | |
Guennadi Liakhovetski | e410511 | 2010-11-11 15:44:52 +0100 | [diff] [blame] | 1028 | for (i = 0; i < (128 - edid[2]) / DETAILED_TIMING_DESCRIPTION_SIZE; |
| 1029 | i++, block += DETAILED_TIMING_DESCRIPTION_SIZE) |
| 1030 | if (PIXEL_CLOCK) |
| 1031 | edt[num++] = block - edid; |
Erik Gilling | 9fbbdde | 2010-11-11 15:44:43 +0100 | [diff] [blame] | 1032 | |
| 1033 | /* Yikes, EDID data is totally useless */ |
Guennadi Liakhovetski | 0ad83f6 | 2010-11-11 15:45:04 +0100 | [diff] [blame] | 1034 | if (!(num + svd_n)) |
Erik Gilling | 9fbbdde | 2010-11-11 15:44:43 +0100 | [diff] [blame] | 1035 | return; |
Erik Gilling | 9fbbdde | 2010-11-11 15:44:43 +0100 | [diff] [blame] | 1036 | |
Guennadi Liakhovetski | 0ad83f6 | 2010-11-11 15:45:04 +0100 | [diff] [blame] | 1037 | m = kzalloc((specs->modedb_len + num + svd_n) * |
Erik Gilling | 9fbbdde | 2010-11-11 15:44:43 +0100 | [diff] [blame] | 1038 | sizeof(struct fb_videomode), GFP_KERNEL); |
| 1039 | |
Guennadi Liakhovetski | e410511 | 2010-11-11 15:44:52 +0100 | [diff] [blame] | 1040 | if (!m) |
Erik Gilling | 9fbbdde | 2010-11-11 15:44:43 +0100 | [diff] [blame] | 1041 | return; |
Guennadi Liakhovetski | e410511 | 2010-11-11 15:44:52 +0100 | [diff] [blame] | 1042 | |
| 1043 | memcpy(m, specs->modedb, specs->modedb_len * sizeof(struct fb_videomode)); |
| 1044 | |
| 1045 | for (i = specs->modedb_len; i < specs->modedb_len + num; i++) { |
| 1046 | get_detailed_timing(edid + edt[i - specs->modedb_len], &m[i]); |
| 1047 | if (i == specs->modedb_len) |
| 1048 | m[i].flag |= FB_MODE_IS_FIRST; |
| 1049 | pr_debug("Adding %ux%u@%u\n", m[i].xres, m[i].yres, m[i].refresh); |
Erik Gilling | 9fbbdde | 2010-11-11 15:44:43 +0100 | [diff] [blame] | 1050 | } |
| 1051 | |
Guennadi Liakhovetski | 0ad83f6 | 2010-11-11 15:45:04 +0100 | [diff] [blame] | 1052 | for (i = specs->modedb_len + num; i < specs->modedb_len + num + svd_n; i++) { |
| 1053 | int idx = svd[i - specs->modedb_len - num]; |
| 1054 | if (!idx || idx > 63) { |
| 1055 | pr_warning("Reserved SVD code %d\n", idx); |
| 1056 | } else if (idx > ARRAY_SIZE(cea_modes) || !cea_modes[idx].xres) { |
| 1057 | pr_warning("Unimplemented SVD code %d\n", idx); |
| 1058 | } else { |
| 1059 | memcpy(&m[i], cea_modes + idx, sizeof(m[i])); |
| 1060 | pr_debug("Adding SVD #%d: %ux%u@%u\n", idx, |
| 1061 | m[i].xres, m[i].yres, m[i].refresh); |
| 1062 | } |
| 1063 | } |
| 1064 | |
Erik Gilling | 9fbbdde | 2010-11-11 15:44:43 +0100 | [diff] [blame] | 1065 | kfree(specs->modedb); |
| 1066 | specs->modedb = m; |
Guennadi Liakhovetski | 0ad83f6 | 2010-11-11 15:45:04 +0100 | [diff] [blame] | 1067 | specs->modedb_len = specs->modedb_len + num + svd_n; |
Erik Gilling | 9fbbdde | 2010-11-11 15:44:43 +0100 | [diff] [blame] | 1068 | } |
| 1069 | |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 1070 | /* |
| 1071 | * VESA Generalized Timing Formula (GTF) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1072 | */ |
| 1073 | |
| 1074 | #define FLYBACK 550 |
| 1075 | #define V_FRONTPORCH 1 |
| 1076 | #define H_OFFSET 40 |
| 1077 | #define H_SCALEFACTOR 20 |
| 1078 | #define H_BLANKSCALE 128 |
| 1079 | #define H_GRADIENT 600 |
| 1080 | #define C_VAL 30 |
| 1081 | #define M_VAL 300 |
| 1082 | |
| 1083 | struct __fb_timings { |
| 1084 | u32 dclk; |
| 1085 | u32 hfreq; |
| 1086 | u32 vfreq; |
| 1087 | u32 hactive; |
| 1088 | u32 vactive; |
| 1089 | u32 hblank; |
| 1090 | u32 vblank; |
| 1091 | u32 htotal; |
| 1092 | u32 vtotal; |
| 1093 | }; |
| 1094 | |
| 1095 | /** |
| 1096 | * fb_get_vblank - get vertical blank time |
| 1097 | * @hfreq: horizontal freq |
| 1098 | * |
| 1099 | * DESCRIPTION: |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 1100 | * vblank = right_margin + vsync_len + left_margin |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | * |
| 1102 | * given: right_margin = 1 (V_FRONTPORCH) |
| 1103 | * vsync_len = 3 |
| 1104 | * flyback = 550 |
| 1105 | * |
| 1106 | * flyback * hfreq |
| 1107 | * left_margin = --------------- - vsync_len |
| 1108 | * 1000000 |
| 1109 | */ |
| 1110 | static u32 fb_get_vblank(u32 hfreq) |
| 1111 | { |
| 1112 | u32 vblank; |
| 1113 | |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 1114 | vblank = (hfreq * FLYBACK)/1000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | vblank = (vblank + 500)/1000; |
| 1116 | return (vblank + V_FRONTPORCH); |
| 1117 | } |
| 1118 | |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 1119 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | * fb_get_hblank_by_freq - get horizontal blank time given hfreq |
| 1121 | * @hfreq: horizontal freq |
| 1122 | * @xres: horizontal resolution in pixels |
| 1123 | * |
| 1124 | * DESCRIPTION: |
| 1125 | * |
| 1126 | * xres * duty_cycle |
| 1127 | * hblank = ------------------ |
| 1128 | * 100 - duty_cycle |
| 1129 | * |
| 1130 | * duty cycle = percent of htotal assigned to inactive display |
| 1131 | * duty cycle = C - (M/Hfreq) |
| 1132 | * |
| 1133 | * where: C = ((offset - scale factor) * blank_scale) |
| 1134 | * -------------------------------------- + scale factor |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 1135 | * 256 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | * M = blank_scale * gradient |
| 1137 | * |
| 1138 | */ |
| 1139 | static u32 fb_get_hblank_by_hfreq(u32 hfreq, u32 xres) |
| 1140 | { |
| 1141 | u32 c_val, m_val, duty_cycle, hblank; |
| 1142 | |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 1143 | c_val = (((H_OFFSET - H_SCALEFACTOR) * H_BLANKSCALE)/256 + |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | H_SCALEFACTOR) * 1000; |
| 1145 | m_val = (H_BLANKSCALE * H_GRADIENT)/256; |
| 1146 | m_val = (m_val * 1000000)/hfreq; |
| 1147 | duty_cycle = c_val - m_val; |
| 1148 | hblank = (xres * duty_cycle)/(100000 - duty_cycle); |
| 1149 | return (hblank); |
| 1150 | } |
| 1151 | |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 1152 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1153 | * fb_get_hblank_by_dclk - get horizontal blank time given pixelclock |
| 1154 | * @dclk: pixelclock in Hz |
| 1155 | * @xres: horizontal resolution in pixels |
| 1156 | * |
| 1157 | * DESCRIPTION: |
| 1158 | * |
| 1159 | * xres * duty_cycle |
| 1160 | * hblank = ------------------ |
| 1161 | * 100 - duty_cycle |
| 1162 | * |
| 1163 | * duty cycle = percent of htotal assigned to inactive display |
| 1164 | * duty cycle = C - (M * h_period) |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 1165 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1166 | * where: h_period = SQRT(100 - C + (0.4 * xres * M)/dclk) + C - 100 |
| 1167 | * ----------------------------------------------- |
| 1168 | * 2 * M |
| 1169 | * M = 300; |
| 1170 | * C = 30; |
| 1171 | |
| 1172 | */ |
| 1173 | static u32 fb_get_hblank_by_dclk(u32 dclk, u32 xres) |
| 1174 | { |
| 1175 | u32 duty_cycle, h_period, hblank; |
| 1176 | |
| 1177 | dclk /= 1000; |
| 1178 | h_period = 100 - C_VAL; |
| 1179 | h_period *= h_period; |
| 1180 | h_period += (M_VAL * xres * 2 * 1000)/(5 * dclk); |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 1181 | h_period *= 10000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1182 | |
| 1183 | h_period = int_sqrt(h_period); |
| 1184 | h_period -= (100 - C_VAL) * 100; |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 1185 | h_period *= 1000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1186 | h_period /= 2 * M_VAL; |
| 1187 | |
| 1188 | duty_cycle = C_VAL * 1000 - (M_VAL * h_period)/100; |
| 1189 | hblank = (xres * duty_cycle)/(100000 - duty_cycle) + 8; |
| 1190 | hblank &= ~15; |
| 1191 | return (hblank); |
| 1192 | } |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 1193 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1194 | /** |
| 1195 | * fb_get_hfreq - estimate hsync |
| 1196 | * @vfreq: vertical refresh rate |
| 1197 | * @yres: vertical resolution |
| 1198 | * |
| 1199 | * DESCRIPTION: |
| 1200 | * |
| 1201 | * (yres + front_port) * vfreq * 1000000 |
| 1202 | * hfreq = ------------------------------------- |
| 1203 | * (1000000 - (vfreq * FLYBACK) |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 1204 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1205 | */ |
| 1206 | |
| 1207 | static u32 fb_get_hfreq(u32 vfreq, u32 yres) |
| 1208 | { |
| 1209 | u32 divisor, hfreq; |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 1210 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1211 | divisor = (1000000 - (vfreq * FLYBACK))/1000; |
| 1212 | hfreq = (yres + V_FRONTPORCH) * vfreq * 1000; |
| 1213 | return (hfreq/divisor); |
| 1214 | } |
| 1215 | |
| 1216 | static void fb_timings_vfreq(struct __fb_timings *timings) |
| 1217 | { |
| 1218 | timings->hfreq = fb_get_hfreq(timings->vfreq, timings->vactive); |
| 1219 | timings->vblank = fb_get_vblank(timings->hfreq); |
| 1220 | timings->vtotal = timings->vactive + timings->vblank; |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 1221 | timings->hblank = fb_get_hblank_by_hfreq(timings->hfreq, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1222 | timings->hactive); |
| 1223 | timings->htotal = timings->hactive + timings->hblank; |
| 1224 | timings->dclk = timings->htotal * timings->hfreq; |
| 1225 | } |
| 1226 | |
| 1227 | static void fb_timings_hfreq(struct __fb_timings *timings) |
| 1228 | { |
| 1229 | timings->vblank = fb_get_vblank(timings->hfreq); |
| 1230 | timings->vtotal = timings->vactive + timings->vblank; |
| 1231 | timings->vfreq = timings->hfreq/timings->vtotal; |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 1232 | timings->hblank = fb_get_hblank_by_hfreq(timings->hfreq, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1233 | timings->hactive); |
| 1234 | timings->htotal = timings->hactive + timings->hblank; |
| 1235 | timings->dclk = timings->htotal * timings->hfreq; |
| 1236 | } |
| 1237 | |
| 1238 | static void fb_timings_dclk(struct __fb_timings *timings) |
| 1239 | { |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 1240 | timings->hblank = fb_get_hblank_by_dclk(timings->dclk, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1241 | timings->hactive); |
| 1242 | timings->htotal = timings->hactive + timings->hblank; |
| 1243 | timings->hfreq = timings->dclk/timings->htotal; |
| 1244 | timings->vblank = fb_get_vblank(timings->hfreq); |
| 1245 | timings->vtotal = timings->vactive + timings->vblank; |
| 1246 | timings->vfreq = timings->hfreq/timings->vtotal; |
| 1247 | } |
| 1248 | |
| 1249 | /* |
| 1250 | * fb_get_mode - calculates video mode using VESA GTF |
| 1251 | * @flags: if: 0 - maximize vertical refresh rate |
| 1252 | * 1 - vrefresh-driven calculation; |
| 1253 | * 2 - hscan-driven calculation; |
| 1254 | * 3 - pixelclock-driven calculation; |
| 1255 | * @val: depending on @flags, ignored, vrefresh, hsync or pixelclock |
| 1256 | * @var: pointer to fb_var_screeninfo |
| 1257 | * @info: pointer to fb_info |
| 1258 | * |
| 1259 | * DESCRIPTION: |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 1260 | * Calculates video mode based on monitor specs using VESA GTF. |
| 1261 | * The GTF is best for VESA GTF compliant monitors but is |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1262 | * specifically formulated to work for older monitors as well. |
| 1263 | * |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 1264 | * If @flag==0, the function will attempt to maximize the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1265 | * refresh rate. Otherwise, it will calculate timings based on |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 1266 | * the flag and accompanying value. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1267 | * |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 1268 | * If FB_IGNOREMON bit is set in @flags, monitor specs will be |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1269 | * ignored and @var will be filled with the calculated timings. |
| 1270 | * |
| 1271 | * All calculations are based on the VESA GTF Spreadsheet |
| 1272 | * available at VESA's public ftp (http://www.vesa.org). |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 1273 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1274 | * NOTES: |
| 1275 | * The timings generated by the GTF will be different from VESA |
| 1276 | * DMT. It might be a good idea to keep a table of standard |
| 1277 | * VESA modes as well. The GTF may also not work for some displays, |
| 1278 | * such as, and especially, analog TV. |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 1279 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1280 | * REQUIRES: |
| 1281 | * A valid info->monspecs, otherwise 'safe numbers' will be used. |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 1282 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1283 | int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var, struct fb_info *info) |
| 1284 | { |
Antonino A. Daplas | af5d0f7 | 2006-01-09 20:53:38 -0800 | [diff] [blame] | 1285 | struct __fb_timings *timings; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1286 | u32 interlace = 1, dscan = 1; |
Antonino A. Daplas | af5d0f7 | 2006-01-09 20:53:38 -0800 | [diff] [blame] | 1287 | u32 hfmin, hfmax, vfmin, vfmax, dclkmin, dclkmax, err = 0; |
| 1288 | |
| 1289 | |
| 1290 | timings = kzalloc(sizeof(struct __fb_timings), GFP_KERNEL); |
| 1291 | |
| 1292 | if (!timings) |
| 1293 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1294 | |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 1295 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | * If monspecs are invalid, use values that are enough |
| 1297 | * for 640x480@60 |
| 1298 | */ |
Antonino A. Daplas | af5d0f7 | 2006-01-09 20:53:38 -0800 | [diff] [blame] | 1299 | if (!info || !info->monspecs.hfmax || !info->monspecs.vfmax || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1300 | !info->monspecs.dclkmax || |
| 1301 | info->monspecs.hfmax < info->monspecs.hfmin || |
| 1302 | info->monspecs.vfmax < info->monspecs.vfmin || |
| 1303 | info->monspecs.dclkmax < info->monspecs.dclkmin) { |
| 1304 | hfmin = 29000; hfmax = 30000; |
| 1305 | vfmin = 60; vfmax = 60; |
| 1306 | dclkmin = 0; dclkmax = 25000000; |
| 1307 | } else { |
| 1308 | hfmin = info->monspecs.hfmin; |
| 1309 | hfmax = info->monspecs.hfmax; |
| 1310 | vfmin = info->monspecs.vfmin; |
| 1311 | vfmax = info->monspecs.vfmax; |
| 1312 | dclkmin = info->monspecs.dclkmin; |
| 1313 | dclkmax = info->monspecs.dclkmax; |
| 1314 | } |
| 1315 | |
Antonino A. Daplas | af5d0f7 | 2006-01-09 20:53:38 -0800 | [diff] [blame] | 1316 | timings->hactive = var->xres; |
| 1317 | timings->vactive = var->yres; |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 1318 | if (var->vmode & FB_VMODE_INTERLACED) { |
Antonino A. Daplas | af5d0f7 | 2006-01-09 20:53:38 -0800 | [diff] [blame] | 1319 | timings->vactive /= 2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1320 | interlace = 2; |
| 1321 | } |
| 1322 | if (var->vmode & FB_VMODE_DOUBLE) { |
Antonino A. Daplas | af5d0f7 | 2006-01-09 20:53:38 -0800 | [diff] [blame] | 1323 | timings->vactive *= 2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1324 | dscan = 2; |
| 1325 | } |
| 1326 | |
| 1327 | switch (flags & ~FB_IGNOREMON) { |
| 1328 | case FB_MAXTIMINGS: /* maximize refresh rate */ |
Antonino A. Daplas | af5d0f7 | 2006-01-09 20:53:38 -0800 | [diff] [blame] | 1329 | timings->hfreq = hfmax; |
| 1330 | fb_timings_hfreq(timings); |
| 1331 | if (timings->vfreq > vfmax) { |
| 1332 | timings->vfreq = vfmax; |
| 1333 | fb_timings_vfreq(timings); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1334 | } |
Antonino A. Daplas | af5d0f7 | 2006-01-09 20:53:38 -0800 | [diff] [blame] | 1335 | if (timings->dclk > dclkmax) { |
| 1336 | timings->dclk = dclkmax; |
| 1337 | fb_timings_dclk(timings); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1338 | } |
| 1339 | break; |
| 1340 | case FB_VSYNCTIMINGS: /* vrefresh driven */ |
Antonino A. Daplas | af5d0f7 | 2006-01-09 20:53:38 -0800 | [diff] [blame] | 1341 | timings->vfreq = val; |
| 1342 | fb_timings_vfreq(timings); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1343 | break; |
| 1344 | case FB_HSYNCTIMINGS: /* hsync driven */ |
Antonino A. Daplas | af5d0f7 | 2006-01-09 20:53:38 -0800 | [diff] [blame] | 1345 | timings->hfreq = val; |
| 1346 | fb_timings_hfreq(timings); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1347 | break; |
| 1348 | case FB_DCLKTIMINGS: /* pixelclock driven */ |
Antonino A. Daplas | af5d0f7 | 2006-01-09 20:53:38 -0800 | [diff] [blame] | 1349 | timings->dclk = PICOS2KHZ(val) * 1000; |
| 1350 | fb_timings_dclk(timings); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1351 | break; |
| 1352 | default: |
Antonino A. Daplas | af5d0f7 | 2006-01-09 20:53:38 -0800 | [diff] [blame] | 1353 | err = -EINVAL; |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 1354 | |
| 1355 | } |
| 1356 | |
Antonino A. Daplas | af5d0f7 | 2006-01-09 20:53:38 -0800 | [diff] [blame] | 1357 | if (err || (!(flags & FB_IGNOREMON) && |
| 1358 | (timings->vfreq < vfmin || timings->vfreq > vfmax || |
| 1359 | timings->hfreq < hfmin || timings->hfreq > hfmax || |
| 1360 | timings->dclk < dclkmin || timings->dclk > dclkmax))) { |
| 1361 | err = -EINVAL; |
| 1362 | } else { |
| 1363 | var->pixclock = KHZ2PICOS(timings->dclk/1000); |
| 1364 | var->hsync_len = (timings->htotal * 8)/100; |
| 1365 | var->right_margin = (timings->hblank/2) - var->hsync_len; |
| 1366 | var->left_margin = timings->hblank - var->right_margin - |
| 1367 | var->hsync_len; |
| 1368 | var->vsync_len = (3 * interlace)/dscan; |
| 1369 | var->lower_margin = (1 * interlace)/dscan; |
| 1370 | var->upper_margin = (timings->vblank * interlace)/dscan - |
| 1371 | (var->vsync_len + var->lower_margin); |
| 1372 | } |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 1373 | |
Antonino A. Daplas | af5d0f7 | 2006-01-09 20:53:38 -0800 | [diff] [blame] | 1374 | kfree(timings); |
| 1375 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1376 | } |
Steffen Trumtrar | 2db54c7 | 2012-11-14 10:55:04 +0100 | [diff] [blame^] | 1377 | |
| 1378 | #if IS_ENABLED(CONFIG_VIDEOMODE) |
| 1379 | int fb_videomode_from_videomode(const struct videomode *vm, |
| 1380 | struct fb_videomode *fbmode) |
| 1381 | { |
| 1382 | unsigned int htotal, vtotal; |
| 1383 | |
| 1384 | fbmode->xres = vm->hactive; |
| 1385 | fbmode->left_margin = vm->hback_porch; |
| 1386 | fbmode->right_margin = vm->hfront_porch; |
| 1387 | fbmode->hsync_len = vm->hsync_len; |
| 1388 | |
| 1389 | fbmode->yres = vm->vactive; |
| 1390 | fbmode->upper_margin = vm->vback_porch; |
| 1391 | fbmode->lower_margin = vm->vfront_porch; |
| 1392 | fbmode->vsync_len = vm->vsync_len; |
| 1393 | |
| 1394 | /* prevent division by zero in KHZ2PICOS macro */ |
| 1395 | fbmode->pixclock = vm->pixelclock ? |
| 1396 | KHZ2PICOS(vm->pixelclock / 1000) : 0; |
| 1397 | |
| 1398 | fbmode->sync = 0; |
| 1399 | fbmode->vmode = 0; |
| 1400 | if (vm->dmt_flags & VESA_DMT_HSYNC_HIGH) |
| 1401 | fbmode->sync |= FB_SYNC_HOR_HIGH_ACT; |
| 1402 | if (vm->dmt_flags & VESA_DMT_HSYNC_HIGH) |
| 1403 | fbmode->sync |= FB_SYNC_VERT_HIGH_ACT; |
| 1404 | if (vm->data_flags & DISPLAY_FLAGS_INTERLACED) |
| 1405 | fbmode->vmode |= FB_VMODE_INTERLACED; |
| 1406 | if (vm->data_flags & DISPLAY_FLAGS_DOUBLESCAN) |
| 1407 | fbmode->vmode |= FB_VMODE_DOUBLE; |
| 1408 | fbmode->flag = 0; |
| 1409 | |
| 1410 | htotal = vm->hactive + vm->hfront_porch + vm->hback_porch + |
| 1411 | vm->hsync_len; |
| 1412 | vtotal = vm->vactive + vm->vfront_porch + vm->vback_porch + |
| 1413 | vm->vsync_len; |
| 1414 | /* prevent division by zero */ |
| 1415 | if (htotal && vtotal) { |
| 1416 | fbmode->refresh = vm->pixelclock / (htotal * vtotal); |
| 1417 | /* a mode must have htotal and vtotal != 0 or it is invalid */ |
| 1418 | } else { |
| 1419 | fbmode->refresh = 0; |
| 1420 | return -EINVAL; |
| 1421 | } |
| 1422 | |
| 1423 | return 0; |
| 1424 | } |
| 1425 | EXPORT_SYMBOL_GPL(fb_videomode_from_videomode); |
| 1426 | #endif |
| 1427 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1428 | #else |
| 1429 | int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var) |
| 1430 | { |
| 1431 | return 1; |
| 1432 | } |
| 1433 | void fb_edid_to_monspecs(unsigned char *edid, struct fb_monspecs *specs) |
| 1434 | { |
| 1435 | specs = NULL; |
| 1436 | } |
Guennadi Liakhovetski | e410511 | 2010-11-11 15:44:52 +0100 | [diff] [blame] | 1437 | void fb_edid_add_monspecs(unsigned char *edid, struct fb_monspecs *specs) |
| 1438 | { |
| 1439 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1440 | void fb_destroy_modedb(struct fb_videomode *modedb) |
| 1441 | { |
| 1442 | } |
| 1443 | int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var, |
| 1444 | struct fb_info *info) |
| 1445 | { |
| 1446 | return -EINVAL; |
| 1447 | } |
| 1448 | #endif /* CONFIG_FB_MODE_HELPERS */ |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 1449 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1450 | /* |
| 1451 | * fb_validate_mode - validates var against monitor capabilities |
| 1452 | * @var: pointer to fb_var_screeninfo |
| 1453 | * @info: pointer to fb_info |
| 1454 | * |
| 1455 | * DESCRIPTION: |
| 1456 | * Validates video mode against monitor capabilities specified in |
| 1457 | * info->monspecs. |
| 1458 | * |
| 1459 | * REQUIRES: |
| 1460 | * A valid info->monspecs. |
| 1461 | */ |
| 1462 | int fb_validate_mode(const struct fb_var_screeninfo *var, struct fb_info *info) |
| 1463 | { |
| 1464 | u32 hfreq, vfreq, htotal, vtotal, pixclock; |
| 1465 | u32 hfmin, hfmax, vfmin, vfmax, dclkmin, dclkmax; |
| 1466 | |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 1467 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1468 | * If monspecs are invalid, use values that are enough |
| 1469 | * for 640x480@60 |
| 1470 | */ |
| 1471 | if (!info->monspecs.hfmax || !info->monspecs.vfmax || |
| 1472 | !info->monspecs.dclkmax || |
| 1473 | info->monspecs.hfmax < info->monspecs.hfmin || |
| 1474 | info->monspecs.vfmax < info->monspecs.vfmin || |
| 1475 | info->monspecs.dclkmax < info->monspecs.dclkmin) { |
| 1476 | hfmin = 29000; hfmax = 30000; |
| 1477 | vfmin = 60; vfmax = 60; |
| 1478 | dclkmin = 0; dclkmax = 25000000; |
| 1479 | } else { |
| 1480 | hfmin = info->monspecs.hfmin; |
| 1481 | hfmax = info->monspecs.hfmax; |
| 1482 | vfmin = info->monspecs.vfmin; |
| 1483 | vfmax = info->monspecs.vfmax; |
| 1484 | dclkmin = info->monspecs.dclkmin; |
| 1485 | dclkmax = info->monspecs.dclkmax; |
| 1486 | } |
| 1487 | |
| 1488 | if (!var->pixclock) |
| 1489 | return -EINVAL; |
| 1490 | pixclock = PICOS2KHZ(var->pixclock) * 1000; |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 1491 | |
| 1492 | htotal = var->xres + var->right_margin + var->hsync_len + |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1493 | var->left_margin; |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 1494 | vtotal = var->yres + var->lower_margin + var->vsync_len + |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1495 | var->upper_margin; |
| 1496 | |
| 1497 | if (var->vmode & FB_VMODE_INTERLACED) |
| 1498 | vtotal /= 2; |
| 1499 | if (var->vmode & FB_VMODE_DOUBLE) |
| 1500 | vtotal *= 2; |
| 1501 | |
| 1502 | hfreq = pixclock/htotal; |
Jon Smirl | 0a793b7 | 2005-07-27 11:46:03 -0700 | [diff] [blame] | 1503 | hfreq = (hfreq + 500) / 1000 * 1000; |
| 1504 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1505 | vfreq = hfreq/vtotal; |
| 1506 | |
Andre Haupt | 8c85fd8 | 2008-02-06 01:39:10 -0800 | [diff] [blame] | 1507 | return (vfreq < vfmin || vfreq > vfmax || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1508 | hfreq < hfmin || hfreq > hfmax || |
| 1509 | pixclock < dclkmin || pixclock > dclkmax) ? |
| 1510 | -EINVAL : 0; |
| 1511 | } |
| 1512 | |
Antonino A. Daplas | ba70710 | 2006-06-26 00:26:37 -0700 | [diff] [blame] | 1513 | #if defined(CONFIG_FIRMWARE_EDID) && defined(CONFIG_X86) |
Antonino A. Daplas | 5e518d7 | 2005-09-09 13:04:34 -0700 | [diff] [blame] | 1514 | |
| 1515 | /* |
| 1516 | * We need to ensure that the EDID block is only returned for |
| 1517 | * the primary graphics adapter. |
| 1518 | */ |
| 1519 | |
| 1520 | const unsigned char *fb_firmware_edid(struct device *device) |
| 1521 | { |
| 1522 | struct pci_dev *dev = NULL; |
| 1523 | struct resource *res = NULL; |
| 1524 | unsigned char *edid = NULL; |
| 1525 | |
| 1526 | if (device) |
| 1527 | dev = to_pci_dev(device); |
| 1528 | |
| 1529 | if (dev) |
| 1530 | res = &dev->resource[PCI_ROM_RESOURCE]; |
| 1531 | |
| 1532 | if (res && res->flags & IORESOURCE_ROM_SHADOW) |
| 1533 | edid = edid_info.dummy; |
| 1534 | |
| 1535 | return edid; |
| 1536 | } |
| 1537 | #else |
| 1538 | const unsigned char *fb_firmware_edid(struct device *device) |
| 1539 | { |
| 1540 | return NULL; |
| 1541 | } |
Antonino A. Daplas | 59153f7 | 2006-03-27 01:17:29 -0800 | [diff] [blame] | 1542 | #endif |
| 1543 | EXPORT_SYMBOL(fb_firmware_edid); |
Antonino A. Daplas | 5e518d7 | 2005-09-09 13:04:34 -0700 | [diff] [blame] | 1544 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1545 | EXPORT_SYMBOL(fb_parse_edid); |
| 1546 | EXPORT_SYMBOL(fb_edid_to_monspecs); |
Guennadi Liakhovetski | e410511 | 2010-11-11 15:44:52 +0100 | [diff] [blame] | 1547 | EXPORT_SYMBOL(fb_edid_add_monspecs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1548 | EXPORT_SYMBOL(fb_get_mode); |
| 1549 | EXPORT_SYMBOL(fb_validate_mode); |
| 1550 | EXPORT_SYMBOL(fb_destroy_modedb); |