linux/drivers/video/modedb.c
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   1/*
   2 *  linux/drivers/video/modedb.c -- Standard video mode database management
   3 *
   4 *      Copyright (C) 1999 Geert Uytterhoeven
   5 *
   6 *      2001 - Documented with DocBook
   7 *      - Brad Douglas <brad@neruo.com>
   8 *
   9 *  This file is subject to the terms and conditions of the GNU General Public
  10 *  License. See the file COPYING in the main directory of this archive for
  11 *  more details.
  12 */
  13
  14#include <linux/module.h>
  15#include <linux/slab.h>
  16#include <linux/fb.h>
  17#include <linux/kernel.h>
  18
  19#undef DEBUG
  20
  21#define name_matches(v, s, l) \
  22    ((v).name && !strncmp((s), (v).name, (l)) && strlen((v).name) == (l))
  23#define res_matches(v, x, y) \
  24    ((v).xres == (x) && (v).yres == (y))
  25
  26#ifdef DEBUG
  27#define DPRINTK(fmt, args...)   printk("modedb %s: " fmt, __func__ , ## args)
  28#else
  29#define DPRINTK(fmt, args...)
  30#endif
  31
  32const char *fb_mode_option;
  33EXPORT_SYMBOL_GPL(fb_mode_option);
  34
  35/*
  36 *  Standard video mode definitions (taken from XFree86)
  37 */
  38
  39static const struct fb_videomode modedb[] = {
  40
  41        /* 640x400 @ 70 Hz, 31.5 kHz hsync */
  42        { NULL, 70, 640, 400, 39721, 40, 24, 39, 9, 96, 2, 0,
  43                FB_VMODE_NONINTERLACED },
  44
  45        /* 640x480 @ 60 Hz, 31.5 kHz hsync */
  46        { NULL, 60, 640, 480, 39721, 40, 24, 32, 11, 96, 2,     0,
  47                FB_VMODE_NONINTERLACED },
  48
  49        /* 800x600 @ 56 Hz, 35.15 kHz hsync */
  50        { NULL, 56, 800, 600, 27777, 128, 24, 22, 1, 72, 2,     0,
  51                FB_VMODE_NONINTERLACED },
  52
  53        /* 1024x768 @ 87 Hz interlaced, 35.5 kHz hsync */
  54        { NULL, 87, 1024, 768, 22271, 56, 24, 33, 8, 160, 8, 0,
  55                FB_VMODE_INTERLACED },
  56
  57        /* 640x400 @ 85 Hz, 37.86 kHz hsync */
  58        { NULL, 85, 640, 400, 31746, 96, 32, 41, 1, 64, 3,
  59                FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED },
  60
  61        /* 640x480 @ 72 Hz, 36.5 kHz hsync */
  62        { NULL, 72, 640, 480, 31746, 144, 40, 30, 8, 40, 3, 0,
  63                FB_VMODE_NONINTERLACED },
  64
  65        /* 640x480 @ 75 Hz, 37.50 kHz hsync */
  66        { NULL, 75, 640, 480, 31746, 120, 16, 16, 1, 64, 3,     0,
  67                FB_VMODE_NONINTERLACED },
  68
  69        /* 800x600 @ 60 Hz, 37.8 kHz hsync */
  70        { NULL, 60, 800, 600, 25000, 88, 40, 23, 1, 128, 4,
  71                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  72                FB_VMODE_NONINTERLACED },
  73
  74        /* 640x480 @ 85 Hz, 43.27 kHz hsync */
  75        { NULL, 85, 640, 480, 27777, 80, 56, 25, 1, 56, 3, 0,
  76                FB_VMODE_NONINTERLACED },
  77
  78        /* 1152x864 @ 89 Hz interlaced, 44 kHz hsync */
  79        { NULL, 89, 1152, 864, 15384, 96, 16, 110, 1, 216, 10, 0,
  80                FB_VMODE_INTERLACED },
  81        /* 800x600 @ 72 Hz, 48.0 kHz hsync */
  82        { NULL, 72, 800, 600, 20000, 64, 56, 23, 37, 120, 6,
  83                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  84                FB_VMODE_NONINTERLACED },
  85
  86        /* 1024x768 @ 60 Hz, 48.4 kHz hsync */
  87        { NULL, 60, 1024, 768, 15384, 168, 8, 29, 3, 144, 6, 0,
  88                FB_VMODE_NONINTERLACED },
  89
  90        /* 640x480 @ 100 Hz, 53.01 kHz hsync */
  91        { NULL, 100, 640, 480, 21834, 96, 32, 36, 8, 96, 6,     0,
  92                FB_VMODE_NONINTERLACED },
  93
  94        /* 1152x864 @ 60 Hz, 53.5 kHz hsync */
  95        { NULL, 60, 1152, 864, 11123, 208, 64, 16, 4, 256, 8, 0,
  96                FB_VMODE_NONINTERLACED },
  97
  98        /* 800x600 @ 85 Hz, 55.84 kHz hsync */
  99        { NULL, 85, 800, 600, 16460, 160, 64, 36, 16, 64, 5, 0,
 100                FB_VMODE_NONINTERLACED },
 101
 102        /* 1024x768 @ 70 Hz, 56.5 kHz hsync */
 103        { NULL, 70, 1024, 768, 13333, 144, 24, 29, 3, 136, 6, 0,
 104                FB_VMODE_NONINTERLACED },
 105
 106        /* 1280x1024 @ 87 Hz interlaced, 51 kHz hsync */
 107        { NULL, 87, 1280, 1024, 12500, 56, 16, 128, 1, 216, 12, 0,
 108                FB_VMODE_INTERLACED },
 109
 110        /* 800x600 @ 100 Hz, 64.02 kHz hsync */
 111        { NULL, 100, 800, 600, 14357, 160, 64, 30, 4, 64, 6, 0,
 112                FB_VMODE_NONINTERLACED },
 113
 114        /* 1024x768 @ 76 Hz, 62.5 kHz hsync */
 115        { NULL, 76, 1024, 768, 11764, 208, 8, 36, 16, 120, 3, 0,
 116                FB_VMODE_NONINTERLACED },
 117
 118        /* 1152x864 @ 70 Hz, 62.4 kHz hsync */
 119        { NULL, 70, 1152, 864, 10869, 106, 56, 20, 1, 160, 10, 0,
 120                FB_VMODE_NONINTERLACED },
 121
 122        /* 1280x1024 @ 61 Hz, 64.2 kHz hsync */
 123        { NULL, 61, 1280, 1024, 9090, 200, 48, 26, 1, 184, 3, 0,
 124                FB_VMODE_NONINTERLACED },
 125
 126        /* 1400x1050 @ 60Hz, 63.9 kHz hsync */
 127        { NULL, 60, 1400, 1050, 9259, 136, 40, 13, 1, 112, 3, 0,
 128                FB_VMODE_NONINTERLACED },
 129
 130        /* 1400x1050 @ 75,107 Hz, 82,392 kHz +hsync +vsync*/
 131        { NULL, 75, 1400, 1050, 7190, 120, 56, 23, 10, 112, 13,
 132                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 133                FB_VMODE_NONINTERLACED },
 134
 135        /* 1400x1050 @ 60 Hz, ? kHz +hsync +vsync*/
 136        { NULL, 60, 1400, 1050, 9259, 128, 40, 12, 0, 112, 3,
 137                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 138                FB_VMODE_NONINTERLACED },
 139
 140        /* 1024x768 @ 85 Hz, 70.24 kHz hsync */
 141        { NULL, 85, 1024, 768, 10111, 192, 32, 34, 14, 160, 6, 0,
 142                FB_VMODE_NONINTERLACED },
 143
 144        /* 1152x864 @ 78 Hz, 70.8 kHz hsync */
 145        { NULL, 78, 1152, 864, 9090, 228, 88, 32, 0, 84, 12, 0,
 146                FB_VMODE_NONINTERLACED },
 147
 148        /* 1280x1024 @ 70 Hz, 74.59 kHz hsync */
 149        { NULL, 70, 1280, 1024, 7905, 224, 32, 28, 8, 160, 8, 0,
 150                FB_VMODE_NONINTERLACED },
 151
 152        /* 1600x1200 @ 60Hz, 75.00 kHz hsync */
 153        { NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
 154                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 155                FB_VMODE_NONINTERLACED },
 156
 157        /* 1152x864 @ 84 Hz, 76.0 kHz hsync */
 158        { NULL, 84, 1152, 864, 7407, 184, 312, 32, 0, 128, 12, 0,
 159                FB_VMODE_NONINTERLACED },
 160
 161        /* 1280x1024 @ 74 Hz, 78.85 kHz hsync */
 162        { NULL, 74, 1280, 1024, 7407, 256, 32, 34, 3, 144, 3, 0,
 163                FB_VMODE_NONINTERLACED },
 164
 165        /* 1024x768 @ 100Hz, 80.21 kHz hsync */
 166        { NULL, 100, 1024, 768, 8658, 192, 32, 21, 3, 192, 10, 0,
 167                FB_VMODE_NONINTERLACED },
 168
 169        /* 1280x1024 @ 76 Hz, 81.13 kHz hsync */
 170        { NULL, 76, 1280, 1024, 7407, 248, 32, 34, 3, 104, 3, 0,
 171                FB_VMODE_NONINTERLACED },
 172
 173        /* 1600x1200 @ 70 Hz, 87.50 kHz hsync */
 174        { NULL, 70, 1600, 1200, 5291, 304, 64, 46, 1, 192, 3, 0,
 175                FB_VMODE_NONINTERLACED },
 176
 177        /* 1152x864 @ 100 Hz, 89.62 kHz hsync */
 178        { NULL, 100, 1152, 864, 7264, 224, 32, 17, 2, 128, 19, 0,
 179                FB_VMODE_NONINTERLACED },
 180
 181        /* 1280x1024 @ 85 Hz, 91.15 kHz hsync */
 182        { NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3,
 183                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 184                FB_VMODE_NONINTERLACED },
 185
 186        /* 1600x1200 @ 75 Hz, 93.75 kHz hsync */
 187        { NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3,
 188                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 189                FB_VMODE_NONINTERLACED },
 190
 191        /* 1680x1050 @ 60 Hz, 65.191 kHz hsync */
 192        { NULL, 60, 1680, 1050, 6848, 280, 104, 30, 3, 176, 6,
 193                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 194                FB_VMODE_NONINTERLACED },
 195
 196        /* 1600x1200 @ 85 Hz, 105.77 kHz hsync */
 197        { NULL, 85, 1600, 1200, 4545, 272, 16, 37, 4, 192, 3,
 198                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 199                FB_VMODE_NONINTERLACED },
 200
 201        /* 1280x1024 @ 100 Hz, 107.16 kHz hsync */
 202        { NULL, 100, 1280, 1024, 5502, 256, 32, 26, 7, 128, 15, 0,
 203                FB_VMODE_NONINTERLACED },
 204
 205        /* 1800x1440 @ 64Hz, 96.15 kHz hsync  */
 206        { NULL, 64, 1800, 1440, 4347, 304, 96, 46, 1, 192, 3,
 207                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 208                FB_VMODE_NONINTERLACED },
 209
 210        /* 1800x1440 @ 70Hz, 104.52 kHz hsync  */
 211        { NULL, 70, 1800, 1440, 4000, 304, 96, 46, 1, 192, 3,
 212                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 213                FB_VMODE_NONINTERLACED },
 214
 215        /* 512x384 @ 78 Hz, 31.50 kHz hsync */
 216        { NULL, 78, 512, 384, 49603, 48, 16, 16, 1, 64, 3, 0,
 217                FB_VMODE_NONINTERLACED },
 218
 219        /* 512x384 @ 85 Hz, 34.38 kHz hsync */
 220        { NULL, 85, 512, 384, 45454, 48, 16, 16, 1, 64, 3, 0,
 221                FB_VMODE_NONINTERLACED },
 222
 223        /* 320x200 @ 70 Hz, 31.5 kHz hsync, 8:5 aspect ratio */
 224        { NULL, 70, 320, 200, 79440, 16, 16, 20, 4, 48, 1, 0,
 225                FB_VMODE_DOUBLE },
 226
 227        /* 320x240 @ 60 Hz, 31.5 kHz hsync, 4:3 aspect ratio */
 228        { NULL, 60, 320, 240, 79440, 16, 16, 16, 5, 48, 1, 0,
 229                FB_VMODE_DOUBLE },
 230
 231        /* 320x240 @ 72 Hz, 36.5 kHz hsync */
 232        { NULL, 72, 320, 240, 63492, 16, 16, 16, 4, 48, 2, 0,
 233                FB_VMODE_DOUBLE },
 234
 235        /* 400x300 @ 56 Hz, 35.2 kHz hsync, 4:3 aspect ratio */
 236        { NULL, 56, 400, 300, 55555, 64, 16, 10, 1, 32, 1, 0,
 237                FB_VMODE_DOUBLE },
 238
 239        /* 400x300 @ 60 Hz, 37.8 kHz hsync */
 240        { NULL, 60, 400, 300, 50000, 48, 16, 11, 1, 64, 2, 0,
 241                FB_VMODE_DOUBLE },
 242
 243        /* 400x300 @ 72 Hz, 48.0 kHz hsync */
 244        { NULL, 72, 400, 300, 40000, 32, 24, 11, 19, 64, 3,     0,
 245                FB_VMODE_DOUBLE },
 246
 247        /* 480x300 @ 56 Hz, 35.2 kHz hsync, 8:5 aspect ratio */
 248        { NULL, 56, 480, 300, 46176, 80, 16, 10, 1, 40, 1, 0,
 249                FB_VMODE_DOUBLE },
 250
 251        /* 480x300 @ 60 Hz, 37.8 kHz hsync */
 252        { NULL, 60, 480, 300, 41858, 56, 16, 11, 1, 80, 2, 0,
 253                FB_VMODE_DOUBLE },
 254
 255        /* 480x300 @ 63 Hz, 39.6 kHz hsync */
 256        { NULL, 63, 480, 300, 40000, 56, 16, 11, 1, 80, 2, 0,
 257                FB_VMODE_DOUBLE },
 258
 259        /* 480x300 @ 72 Hz, 48.0 kHz hsync */
 260        { NULL, 72, 480, 300, 33386, 40, 24, 11, 19, 80, 3, 0,
 261                FB_VMODE_DOUBLE },
 262
 263        /* 1920x1200 @ 60 Hz, 74.5 Khz hsync */
 264        { NULL, 60, 1920, 1200, 5177, 128, 336, 1, 38, 208, 3,
 265                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 266                FB_VMODE_NONINTERLACED },
 267
 268        /* 1152x768, 60 Hz, PowerBook G4 Titanium I and II */
 269        { NULL, 60, 1152, 768, 14047, 158, 26, 29, 3, 136, 6,
 270                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 271                FB_VMODE_NONINTERLACED },
 272
 273        /* 1366x768, 60 Hz, 47.403 kHz hsync, WXGA 16:9 aspect ratio */
 274        { NULL, 60, 1366, 768, 13806, 120, 10, 14, 3, 32, 5, 0,
 275                FB_VMODE_NONINTERLACED },
 276
 277        /* 1280x800, 60 Hz, 47.403 kHz hsync, WXGA 16:10 aspect ratio */
 278        { NULL, 60, 1280, 800, 12048, 200, 64, 24, 1, 136, 3, 0,
 279                FB_VMODE_NONINTERLACED },
 280
 281        /* 720x576i @ 50 Hz, 15.625 kHz hsync (PAL RGB) */
 282        { NULL, 50, 720, 576, 74074, 64, 16, 39, 5, 64, 5, 0,
 283                FB_VMODE_INTERLACED },
 284
 285        /* 800x520i @ 50 Hz, 15.625 kHz hsync (PAL RGB) */
 286        { NULL, 50, 800, 520, 58823, 144, 64, 72, 28, 80, 5, 0,
 287                FB_VMODE_INTERLACED },
 288
 289        /* 864x480 @ 60 Hz, 35.15 kHz hsync */
 290        { NULL, 60, 864, 480, 27777, 1, 1, 1, 1, 0, 0,
 291                0, FB_VMODE_NONINTERLACED },
 292};
 293
 294#ifdef CONFIG_FB_MODE_HELPERS
 295const struct fb_videomode cea_modes[64] = {
 296        /* #1: 640x480p@59.94/60Hz */
 297        [1] = {
 298                NULL, 60, 640, 480, 39722, 48, 16, 33, 10, 96, 2, 0,
 299                FB_VMODE_NONINTERLACED, 0,
 300        },
 301        /* #3: 720x480p@59.94/60Hz */
 302        [3] = {
 303                NULL, 60, 720, 480, 37037, 60, 16, 30, 9, 62, 6, 0,
 304                FB_VMODE_NONINTERLACED, 0,
 305        },
 306        /* #5: 1920x1080i@59.94/60Hz */
 307        [5] = {
 308                NULL, 60, 1920, 1080, 13763, 148, 88, 15, 2, 44, 5,
 309                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 310                FB_VMODE_INTERLACED, 0,
 311        },
 312        /* #7: 720(1440)x480iH@59.94/60Hz */
 313        [7] = {
 314                NULL, 60, 1440, 480, 18554/*37108*/, 114, 38, 15, 4, 124, 3, 0,
 315                FB_VMODE_INTERLACED, 0,
 316        },
 317        /* #9: 720(1440)x240pH@59.94/60Hz */
 318        [9] = {
 319                NULL, 60, 1440, 240, 18554, 114, 38, 16, 4, 124, 3, 0,
 320                FB_VMODE_NONINTERLACED, 0,
 321        },
 322        /* #18: 720x576pH@50Hz */
 323        [18] = {
 324                NULL, 50, 720, 576, 37037, 68, 12, 39, 5, 64, 5, 0,
 325                FB_VMODE_NONINTERLACED, 0,
 326        },
 327        /* #19: 1280x720p@50Hz */
 328        [19] = {
 329                NULL, 50, 1280, 720, 13468, 220, 440, 20, 5, 40, 5,
 330                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 331                FB_VMODE_NONINTERLACED, 0,
 332        },
 333        /* #20: 1920x1080i@50Hz */
 334        [20] = {
 335                NULL, 50, 1920, 1080, 13480, 148, 528, 15, 5, 528, 5,
 336                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 337                FB_VMODE_INTERLACED, 0,
 338        },
 339        /* #32: 1920x1080p@23.98/24Hz */
 340        [32] = {
 341                NULL, 24, 1920, 1080, 13468, 148, 638, 36, 4, 44, 5,
 342                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 343                FB_VMODE_NONINTERLACED, 0,
 344        },
 345        /* #35: (2880)x480p4x@59.94/60Hz */
 346        [35] = {
 347                NULL, 60, 2880, 480, 9250, 240, 64, 30, 9, 248, 6, 0,
 348                FB_VMODE_NONINTERLACED, 0,
 349        },
 350};
 351
 352const struct fb_videomode vesa_modes[] = {
 353        /* 0 640x350-85 VESA */
 354        { NULL, 85, 640, 350, 31746,  96, 32, 60, 32, 64, 3,
 355          FB_SYNC_HOR_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA},
 356        /* 1 640x400-85 VESA */
 357        { NULL, 85, 640, 400, 31746,  96, 32, 41, 01, 64, 3,
 358          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 359        /* 2 720x400-85 VESA */
 360        { NULL, 85, 721, 400, 28169, 108, 36, 42, 01, 72, 3,
 361          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 362        /* 3 640x480-60 VESA */
 363        { NULL, 60, 640, 480, 39682,  48, 16, 33, 10, 96, 2,
 364          0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 365        /* 4 640x480-72 VESA */
 366        { NULL, 72, 640, 480, 31746, 128, 24, 29, 9, 40, 2,
 367          0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 368        /* 5 640x480-75 VESA */
 369        { NULL, 75, 640, 480, 31746, 120, 16, 16, 01, 64, 3,
 370          0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 371        /* 6 640x480-85 VESA */
 372        { NULL, 85, 640, 480, 27777, 80, 56, 25, 01, 56, 3,
 373          0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 374        /* 7 800x600-56 VESA */
 375        { NULL, 56, 800, 600, 27777, 128, 24, 22, 01, 72, 2,
 376          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 377          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 378        /* 8 800x600-60 VESA */
 379        { NULL, 60, 800, 600, 25000, 88, 40, 23, 01, 128, 4,
 380          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 381          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 382        /* 9 800x600-72 VESA */
 383        { NULL, 72, 800, 600, 20000, 64, 56, 23, 37, 120, 6,
 384          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 385          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 386        /* 10 800x600-75 VESA */
 387        { NULL, 75, 800, 600, 20202, 160, 16, 21, 01, 80, 3,
 388          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 389          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 390        /* 11 800x600-85 VESA */
 391        { NULL, 85, 800, 600, 17761, 152, 32, 27, 01, 64, 3,
 392          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 393          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 394        /* 12 1024x768i-43 VESA */
 395        { NULL, 43, 1024, 768, 22271, 56, 8, 41, 0, 176, 8,
 396          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 397          FB_VMODE_INTERLACED, FB_MODE_IS_VESA },
 398        /* 13 1024x768-60 VESA */
 399        { NULL, 60, 1024, 768, 15384, 160, 24, 29, 3, 136, 6,
 400          0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 401        /* 14 1024x768-70 VESA */
 402        { NULL, 70, 1024, 768, 13333, 144, 24, 29, 3, 136, 6,
 403          0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 404        /* 15 1024x768-75 VESA */
 405        { NULL, 75, 1024, 768, 12690, 176, 16, 28, 1, 96, 3,
 406          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 407          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 408        /* 16 1024x768-85 VESA */
 409        { NULL, 85, 1024, 768, 10582, 208, 48, 36, 1, 96, 3,
 410          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 411          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 412        /* 17 1152x864-75 VESA */
 413        { NULL, 75, 1152, 864, 9259, 256, 64, 32, 1, 128, 3,
 414          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 415          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 416        /* 18 1280x960-60 VESA */
 417        { NULL, 60, 1280, 960, 9259, 312, 96, 36, 1, 112, 3,
 418          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 419          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 420        /* 19 1280x960-85 VESA */
 421        { NULL, 85, 1280, 960, 6734, 224, 64, 47, 1, 160, 3,
 422          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 423          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 424        /* 20 1280x1024-60 VESA */
 425        { NULL, 60, 1280, 1024, 9259, 248, 48, 38, 1, 112, 3,
 426          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 427          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 428        /* 21 1280x1024-75 VESA */
 429        { NULL, 75, 1280, 1024, 7407, 248, 16, 38, 1, 144, 3,
 430          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 431          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 432        /* 22 1280x1024-85 VESA */
 433        { NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3,
 434          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 435          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 436        /* 23 1600x1200-60 VESA */
 437        { NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
 438          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 439          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 440        /* 24 1600x1200-65 VESA */
 441        { NULL, 65, 1600, 1200, 5698, 304,  64, 46, 1, 192, 3,
 442          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 443          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 444        /* 25 1600x1200-70 VESA */
 445        { NULL, 70, 1600, 1200, 5291, 304, 64, 46, 1, 192, 3,
 446          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 447          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 448        /* 26 1600x1200-75 VESA */
 449        { NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3,
 450          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 451          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 452        /* 27 1600x1200-85 VESA */
 453        { NULL, 85, 1600, 1200, 4357, 304, 64, 46, 1, 192, 3,
 454          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 455          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 456        /* 28 1792x1344-60 VESA */
 457        { NULL, 60, 1792, 1344, 4882, 328, 128, 46, 1, 200, 3,
 458          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 459        /* 29 1792x1344-75 VESA */
 460        { NULL, 75, 1792, 1344, 3831, 352, 96, 69, 1, 216, 3,
 461          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 462        /* 30 1856x1392-60 VESA */
 463        { NULL, 60, 1856, 1392, 4580, 352, 96, 43, 1, 224, 3,
 464          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 465        /* 31 1856x1392-75 VESA */
 466        { NULL, 75, 1856, 1392, 3472, 352, 128, 104, 1, 224, 3,
 467          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 468        /* 32 1920x1440-60 VESA */
 469        { NULL, 60, 1920, 1440, 4273, 344, 128, 56, 1, 200, 3,
 470          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 471        /* 33 1920x1440-75 VESA */
 472        { NULL, 75, 1920, 1440, 3367, 352, 144, 56, 1, 224, 3,
 473          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 474};
 475EXPORT_SYMBOL(vesa_modes);
 476#endif /* CONFIG_FB_MODE_HELPERS */
 477
 478/**
 479 *      fb_try_mode - test a video mode
 480 *      @var: frame buffer user defined part of display
 481 *      @info: frame buffer info structure
 482 *      @mode: frame buffer video mode structure
 483 *      @bpp: color depth in bits per pixel
 484 *
 485 *      Tries a video mode to test it's validity for device @info.
 486 *
 487 *      Returns 1 on success.
 488 *
 489 */
 490
 491static int fb_try_mode(struct fb_var_screeninfo *var, struct fb_info *info,
 492                       const struct fb_videomode *mode, unsigned int bpp)
 493{
 494        int err = 0;
 495
 496        DPRINTK("Trying mode %s %dx%d-%d@%d\n",
 497                mode->name ? mode->name : "noname",
 498                mode->xres, mode->yres, bpp, mode->refresh);
 499        var->xres = mode->xres;
 500        var->yres = mode->yres;
 501        var->xres_virtual = mode->xres;
 502        var->yres_virtual = mode->yres;
 503        var->xoffset = 0;
 504        var->yoffset = 0;
 505        var->bits_per_pixel = bpp;
 506        var->activate |= FB_ACTIVATE_TEST;
 507        var->pixclock = mode->pixclock;
 508        var->left_margin = mode->left_margin;
 509        var->right_margin = mode->right_margin;
 510        var->upper_margin = mode->upper_margin;
 511        var->lower_margin = mode->lower_margin;
 512        var->hsync_len = mode->hsync_len;
 513        var->vsync_len = mode->vsync_len;
 514        var->sync = mode->sync;
 515        var->vmode = mode->vmode;
 516        if (info->fbops->fb_check_var)
 517                err = info->fbops->fb_check_var(var, info);
 518        var->activate &= ~FB_ACTIVATE_TEST;
 519        return err;
 520}
 521
 522/**
 523 *     fb_find_mode - finds a valid video mode
 524 *     @var: frame buffer user defined part of display
 525 *     @info: frame buffer info structure
 526 *     @mode_option: string video mode to find
 527 *     @db: video mode database
 528 *     @dbsize: size of @db
 529 *     @default_mode: default video mode to fall back to
 530 *     @default_bpp: default color depth in bits per pixel
 531 *
 532 *     Finds a suitable video mode, starting with the specified mode
 533 *     in @mode_option with fallback to @default_mode.  If
 534 *     @default_mode fails, all modes in the video mode database will
 535 *     be tried.
 536 *
 537 *     Valid mode specifiers for @mode_option:
 538 *
 539 *     <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m] or
 540 *     <name>[-<bpp>][@<refresh>]
 541 *
 542 *     with <xres>, <yres>, <bpp> and <refresh> decimal numbers and
 543 *     <name> a string.
 544 *
 545 *      If 'M' is present after yres (and before refresh/bpp if present),
 546 *      the function will compute the timings using VESA(tm) Coordinated
 547 *      Video Timings (CVT).  If 'R' is present after 'M', will compute with
 548 *      reduced blanking (for flatpanels).  If 'i' is present, compute
 549 *      interlaced mode.  If 'm' is present, add margins equal to 1.8%
 550 *      of xres rounded down to 8 pixels, and 1.8% of yres. The char
 551 *      'i' and 'm' must be after 'M' and 'R'. Example:
 552 *
 553 *      1024x768MR-8@60m - Reduced blank with margins at 60Hz.
 554 *
 555 *     NOTE: The passed struct @var is _not_ cleared!  This allows you
 556 *     to supply values for e.g. the grayscale and accel_flags fields.
 557 *
 558 *     Returns zero for failure, 1 if using specified @mode_option,
 559 *     2 if using specified @mode_option with an ignored refresh rate,
 560 *     3 if default mode is used, 4 if fall back to any valid mode.
 561 *
 562 */
 563
 564int fb_find_mode(struct fb_var_screeninfo *var,
 565                 struct fb_info *info, const char *mode_option,
 566                 const struct fb_videomode *db, unsigned int dbsize,
 567                 const struct fb_videomode *default_mode,
 568                 unsigned int default_bpp)
 569{
 570        int i;
 571
 572        /* Set up defaults */
 573        if (!db) {
 574                db = modedb;
 575                dbsize = ARRAY_SIZE(modedb);
 576        }
 577
 578        if (!default_mode)
 579                default_mode = &db[0];
 580
 581        if (!default_bpp)
 582                default_bpp = 8;
 583
 584        /* Did the user specify a video mode? */
 585        if (!mode_option)
 586                mode_option = fb_mode_option;
 587        if (mode_option) {
 588                const char *name = mode_option;
 589                unsigned int namelen = strlen(name);
 590                int res_specified = 0, bpp_specified = 0, refresh_specified = 0;
 591                unsigned int xres = 0, yres = 0, bpp = default_bpp, refresh = 0;
 592                int yres_specified = 0, cvt = 0, rb = 0, interlace = 0;
 593                int margins = 0;
 594                u32 best, diff, tdiff;
 595
 596                for (i = namelen-1; i >= 0; i--) {
 597                        switch (name[i]) {
 598                        case '@':
 599                                namelen = i;
 600                                if (!refresh_specified && !bpp_specified &&
 601                                    !yres_specified) {
 602                                        refresh = simple_strtol(&name[i+1], NULL,
 603                                                                10);
 604                                        refresh_specified = 1;
 605                                        if (cvt || rb)
 606                                                cvt = 0;
 607                                } else
 608                                        goto done;
 609                                break;
 610                        case '-':
 611                                namelen = i;
 612                                if (!bpp_specified && !yres_specified) {
 613                                        bpp = simple_strtol(&name[i+1], NULL,
 614                                                            10);
 615                                        bpp_specified = 1;
 616                                        if (cvt || rb)
 617                                                cvt = 0;
 618                                } else
 619                                        goto done;
 620                                break;
 621                        case 'x':
 622                                if (!yres_specified) {
 623                                        yres = simple_strtol(&name[i+1], NULL,
 624                                                             10);
 625                                        yres_specified = 1;
 626                                } else
 627                                        goto done;
 628                                break;
 629                        case '0' ... '9':
 630                                break;
 631                        case 'M':
 632                                if (!yres_specified)
 633                                        cvt = 1;
 634                                break;
 635                        case 'R':
 636                                if (!cvt)
 637                                        rb = 1;
 638                                break;
 639                        case 'm':
 640                                if (!cvt)
 641                                        margins = 1;
 642                                break;
 643                        case 'i':
 644                                if (!cvt)
 645                                        interlace = 1;
 646                                break;
 647                        default:
 648                                goto done;
 649                        }
 650                }
 651                if (i < 0 && yres_specified) {
 652                        xres = simple_strtol(name, NULL, 10);
 653                        res_specified = 1;
 654                }
 655done:
 656                if (cvt) {
 657                        struct fb_videomode cvt_mode;
 658                        int ret;
 659
 660                        DPRINTK("CVT mode %dx%d@%dHz%s%s%s\n", xres, yres,
 661                                (refresh) ? refresh : 60,
 662                                (rb) ? " reduced blanking" : "",
 663                                (margins) ? " with margins" : "",
 664                                (interlace) ? " interlaced" : "");
 665
 666                        memset(&cvt_mode, 0, sizeof(cvt_mode));
 667                        cvt_mode.xres = xres;
 668                        cvt_mode.yres = yres;
 669                        cvt_mode.refresh = (refresh) ? refresh : 60;
 670
 671                        if (interlace)
 672                                cvt_mode.vmode |= FB_VMODE_INTERLACED;
 673                        else
 674                                cvt_mode.vmode &= ~FB_VMODE_INTERLACED;
 675
 676                        ret = fb_find_mode_cvt(&cvt_mode, margins, rb);
 677
 678                        if (!ret && !fb_try_mode(var, info, &cvt_mode, bpp)) {
 679                                DPRINTK("modedb CVT: CVT mode ok\n");
 680                                return 1;
 681                        }
 682
 683                        DPRINTK("CVT mode invalid, getting mode from database\n");
 684                }
 685
 686                DPRINTK("Trying specified video mode%s %ix%i\n",
 687                        refresh_specified ? "" : " (ignoring refresh rate)",
 688                        xres, yres);
 689
 690                if (!refresh_specified) {
 691                        /*
 692                         * If the caller has provided a custom mode database and
 693                         * a valid monspecs structure, we look for the mode with
 694                         * the highest refresh rate.  Otherwise we play it safe
 695                         * it and try to find a mode with a refresh rate closest
 696                         * to the standard 60 Hz.
 697                         */
 698                        if (db != modedb &&
 699                            info->monspecs.vfmin && info->monspecs.vfmax &&
 700                            info->monspecs.hfmin && info->monspecs.hfmax &&
 701                            info->monspecs.dclkmax) {
 702                                refresh = 1000;
 703                        } else {
 704                                refresh = 60;
 705                        }
 706                }
 707
 708                diff = -1;
 709                best = -1;
 710                for (i = 0; i < dbsize; i++) {
 711                        if ((name_matches(db[i], name, namelen) ||
 712                             (res_specified && res_matches(db[i], xres, yres))) &&
 713                            !fb_try_mode(var, info, &db[i], bpp)) {
 714                                if (refresh_specified && db[i].refresh == refresh)
 715                                        return 1;
 716
 717                                if (abs(db[i].refresh - refresh) < diff) {
 718                                        diff = abs(db[i].refresh - refresh);
 719                                        best = i;
 720                                }
 721                        }
 722                }
 723                if (best != -1) {
 724                        fb_try_mode(var, info, &db[best], bpp);
 725                        return (refresh_specified) ? 2 : 1;
 726                }
 727
 728                diff = 2 * (xres + yres);
 729                best = -1;
 730                DPRINTK("Trying best-fit modes\n");
 731                for (i = 0; i < dbsize; i++) {
 732                        DPRINTK("Trying %ix%i\n", db[i].xres, db[i].yres);
 733                        if (!fb_try_mode(var, info, &db[i], bpp)) {
 734                                tdiff = abs(db[i].xres - xres) +
 735                                        abs(db[i].yres - yres);
 736
 737                                /*
 738                                 * Penalize modes with resolutions smaller
 739                                 * than requested.
 740                                 */
 741                                if (xres > db[i].xres || yres > db[i].yres)
 742                                        tdiff += xres + yres;
 743
 744                                if (diff > tdiff) {
 745                                        diff = tdiff;
 746                                        best = i;
 747                                }
 748                        }
 749                }
 750                if (best != -1) {
 751                        fb_try_mode(var, info, &db[best], bpp);
 752                        return 5;
 753                }
 754        }
 755
 756        DPRINTK("Trying default video mode\n");
 757        if (!fb_try_mode(var, info, default_mode, default_bpp))
 758                return 3;
 759
 760        DPRINTK("Trying all modes\n");
 761        for (i = 0; i < dbsize; i++)
 762                if (!fb_try_mode(var, info, &db[i], default_bpp))
 763                        return 4;
 764
 765        DPRINTK("No valid mode found\n");
 766        return 0;
 767}
 768
 769/**
 770 * fb_var_to_videomode - convert fb_var_screeninfo to fb_videomode
 771 * @mode: pointer to struct fb_videomode
 772 * @var: pointer to struct fb_var_screeninfo
 773 */
 774void fb_var_to_videomode(struct fb_videomode *mode,
 775                         const struct fb_var_screeninfo *var)
 776{
 777        u32 pixclock, hfreq, htotal, vtotal;
 778
 779        mode->name = NULL;
 780        mode->xres = var->xres;
 781        mode->yres = var->yres;
 782        mode->pixclock = var->pixclock;
 783        mode->hsync_len = var->hsync_len;
 784        mode->vsync_len = var->vsync_len;
 785        mode->left_margin = var->left_margin;
 786        mode->right_margin = var->right_margin;
 787        mode->upper_margin = var->upper_margin;
 788        mode->lower_margin = var->lower_margin;
 789        mode->sync = var->sync;
 790        mode->vmode = var->vmode & FB_VMODE_MASK;
 791        mode->flag = FB_MODE_IS_FROM_VAR;
 792        mode->refresh = 0;
 793
 794        if (!var->pixclock)
 795                return;
 796
 797        pixclock = PICOS2KHZ(var->pixclock) * 1000;
 798
 799        htotal = var->xres + var->right_margin + var->hsync_len +
 800                var->left_margin;
 801        vtotal = var->yres + var->lower_margin + var->vsync_len +
 802                var->upper_margin;
 803
 804        if (var->vmode & FB_VMODE_INTERLACED)
 805                vtotal /= 2;
 806        if (var->vmode & FB_VMODE_DOUBLE)
 807                vtotal *= 2;
 808
 809        hfreq = pixclock/htotal;
 810        mode->refresh = hfreq/vtotal;
 811}
 812
 813/**
 814 * fb_videomode_to_var - convert fb_videomode to fb_var_screeninfo
 815 * @var: pointer to struct fb_var_screeninfo
 816 * @mode: pointer to struct fb_videomode
 817 */
 818void fb_videomode_to_var(struct fb_var_screeninfo *var,
 819                         const struct fb_videomode *mode)
 820{
 821        var->xres = mode->xres;
 822        var->yres = mode->yres;
 823        var->xres_virtual = mode->xres;
 824        var->yres_virtual = mode->yres;
 825        var->xoffset = 0;
 826        var->yoffset = 0;
 827        var->pixclock = mode->pixclock;
 828        var->left_margin = mode->left_margin;
 829        var->right_margin = mode->right_margin;
 830        var->upper_margin = mode->upper_margin;
 831        var->lower_margin = mode->lower_margin;
 832        var->hsync_len = mode->hsync_len;
 833        var->vsync_len = mode->vsync_len;
 834        var->sync = mode->sync;
 835        var->vmode = mode->vmode & FB_VMODE_MASK;
 836}
 837
 838/**
 839 * fb_mode_is_equal - compare 2 videomodes
 840 * @mode1: first videomode
 841 * @mode2: second videomode
 842 *
 843 * RETURNS:
 844 * 1 if equal, 0 if not
 845 */
 846int fb_mode_is_equal(const struct fb_videomode *mode1,
 847                     const struct fb_videomode *mode2)
 848{
 849        return (mode1->xres         == mode2->xres &&
 850                mode1->yres         == mode2->yres &&
 851                mode1->pixclock     == mode2->pixclock &&
 852                mode1->hsync_len    == mode2->hsync_len &&
 853                mode1->vsync_len    == mode2->vsync_len &&
 854                mode1->left_margin  == mode2->left_margin &&
 855                mode1->right_margin == mode2->right_margin &&
 856                mode1->upper_margin == mode2->upper_margin &&
 857                mode1->lower_margin == mode2->lower_margin &&
 858                mode1->sync         == mode2->sync &&
 859                mode1->vmode        == mode2->vmode);
 860}
 861
 862/**
 863 * fb_find_best_mode - find best matching videomode
 864 * @var: pointer to struct fb_var_screeninfo
 865 * @head: pointer to struct list_head of modelist
 866 *
 867 * RETURNS:
 868 * struct fb_videomode, NULL if none found
 869 *
 870 * IMPORTANT:
 871 * This function assumes that all modelist entries in
 872 * info->modelist are valid.
 873 *
 874 * NOTES:
 875 * Finds best matching videomode which has an equal or greater dimension than
 876 * var->xres and var->yres.  If more than 1 videomode is found, will return
 877 * the videomode with the highest refresh rate
 878 */
 879const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var,
 880                                             struct list_head *head)
 881{
 882        struct list_head *pos;
 883        struct fb_modelist *modelist;
 884        struct fb_videomode *mode, *best = NULL;
 885        u32 diff = -1;
 886
 887        list_for_each(pos, head) {
 888                u32 d;
 889
 890                modelist = list_entry(pos, struct fb_modelist, list);
 891                mode = &modelist->mode;
 892
 893                if (mode->xres >= var->xres && mode->yres >= var->yres) {
 894                        d = (mode->xres - var->xres) +
 895                                (mode->yres - var->yres);
 896                        if (diff > d) {
 897                                diff = d;
 898                                best = mode;
 899                        } else if (diff == d && best &&
 900                                   mode->refresh > best->refresh)
 901                                best = mode;
 902                }
 903        }
 904        return best;
 905}
 906
 907/**
 908 * fb_find_nearest_mode - find closest videomode
 909 *
 910 * @mode: pointer to struct fb_videomode
 911 * @head: pointer to modelist
 912 *
 913 * Finds best matching videomode, smaller or greater in dimension.
 914 * If more than 1 videomode is found, will return the videomode with
 915 * the closest refresh rate.
 916 */
 917const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode,
 918                                                struct list_head *head)
 919{
 920        struct list_head *pos;
 921        struct fb_modelist *modelist;
 922        struct fb_videomode *cmode, *best = NULL;
 923        u32 diff = -1, diff_refresh = -1;
 924
 925        list_for_each(pos, head) {
 926                u32 d;
 927
 928                modelist = list_entry(pos, struct fb_modelist, list);
 929                cmode = &modelist->mode;
 930
 931                d = abs(cmode->xres - mode->xres) +
 932                        abs(cmode->yres - mode->yres);
 933                if (diff > d) {
 934                        diff = d;
 935                        diff_refresh = abs(cmode->refresh - mode->refresh);
 936                        best = cmode;
 937                } else if (diff == d) {
 938                        d = abs(cmode->refresh - mode->refresh);
 939                        if (diff_refresh > d) {
 940                                diff_refresh = d;
 941                                best = cmode;
 942                        }
 943                }
 944        }
 945
 946        return best;
 947}
 948
 949/**
 950 * fb_match_mode - find a videomode which exactly matches the timings in var
 951 * @var: pointer to struct fb_var_screeninfo
 952 * @head: pointer to struct list_head of modelist
 953 *
 954 * RETURNS:
 955 * struct fb_videomode, NULL if none found
 956 */
 957const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var,
 958                                         struct list_head *head)
 959{
 960        struct list_head *pos;
 961        struct fb_modelist *modelist;
 962        struct fb_videomode *m, mode;
 963
 964        fb_var_to_videomode(&mode, var);
 965        list_for_each(pos, head) {
 966                modelist = list_entry(pos, struct fb_modelist, list);
 967                m = &modelist->mode;
 968                if (fb_mode_is_equal(m, &mode))
 969                        return m;
 970        }
 971        return NULL;
 972}
 973
 974/**
 975 * fb_add_videomode - adds videomode entry to modelist
 976 * @mode: videomode to add
 977 * @head: struct list_head of modelist
 978 *
 979 * NOTES:
 980 * Will only add unmatched mode entries
 981 */
 982int fb_add_videomode(const struct fb_videomode *mode, struct list_head *head)
 983{
 984        struct list_head *pos;
 985        struct fb_modelist *modelist;
 986        struct fb_videomode *m;
 987        int found = 0;
 988
 989        list_for_each(pos, head) {
 990                modelist = list_entry(pos, struct fb_modelist, list);
 991                m = &modelist->mode;
 992                if (fb_mode_is_equal(m, mode)) {
 993                        found = 1;
 994                        break;
 995                }
 996        }
 997        if (!found) {
 998                modelist = kmalloc(sizeof(struct fb_modelist),
 999                                                  GFP_KERNEL);
1000
1001                if (!modelist)
1002                        return -ENOMEM;
1003                modelist->mode = *mode;
1004                list_add(&modelist->list, head);
1005        }
1006        return 0;
1007}
1008
1009/**
1010 * fb_delete_videomode - removed videomode entry from modelist
1011 * @mode: videomode to remove
1012 * @head: struct list_head of modelist
1013 *
1014 * NOTES:
1015 * Will remove all matching mode entries
1016 */
1017void fb_delete_videomode(const struct fb_videomode *mode,
1018                         struct list_head *head)
1019{
1020        struct list_head *pos, *n;
1021        struct fb_modelist *modelist;
1022        struct fb_videomode *m;
1023
1024        list_for_each_safe(pos, n, head) {
1025                modelist = list_entry(pos, struct fb_modelist, list);
1026                m = &modelist->mode;
1027                if (fb_mode_is_equal(m, mode)) {
1028                        list_del(pos);
1029                        kfree(pos);
1030                }
1031        }
1032}
1033
1034/**
1035 * fb_destroy_modelist - destroy modelist
1036 * @head: struct list_head of modelist
1037 */
1038void fb_destroy_modelist(struct list_head *head)
1039{
1040        struct list_head *pos, *n;
1041
1042        list_for_each_safe(pos, n, head) {
1043                list_del(pos);
1044                kfree(pos);
1045        }
1046}
1047EXPORT_SYMBOL_GPL(fb_destroy_modelist);
1048
1049/**
1050 * fb_videomode_to_modelist - convert mode array to mode list
1051 * @modedb: array of struct fb_videomode
1052 * @num: number of entries in array
1053 * @head: struct list_head of modelist
1054 */
1055void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num,
1056                              struct list_head *head)
1057{
1058        int i;
1059
1060        INIT_LIST_HEAD(head);
1061
1062        for (i = 0; i < num; i++) {
1063                if (fb_add_videomode(&modedb[i], head))
1064                        return;
1065        }
1066}
1067
1068const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs,
1069                                                struct list_head *head)
1070{
1071        struct list_head *pos;
1072        struct fb_modelist *modelist;
1073        const struct fb_videomode *m, *m1 = NULL, *md = NULL, *best = NULL;
1074        int first = 0;
1075
1076        if (!head->prev || !head->next || list_empty(head))
1077                goto finished;
1078
1079        /* get the first detailed mode and the very first mode */
1080        list_for_each(pos, head) {
1081                modelist = list_entry(pos, struct fb_modelist, list);
1082                m = &modelist->mode;
1083
1084                if (!first) {
1085                        m1 = m;
1086                        first = 1;
1087                }
1088
1089                if (m->flag & FB_MODE_IS_FIRST) {
1090                        md = m;
1091                        break;
1092                }
1093        }
1094
1095        /* first detailed timing is preferred */
1096        if (specs->misc & FB_MISC_1ST_DETAIL) {
1097                best = md;
1098                goto finished;
1099        }
1100
1101        /* find best mode based on display width and height */
1102        if (specs->max_x && specs->max_y) {
1103                struct fb_var_screeninfo var;
1104
1105                memset(&var, 0, sizeof(struct fb_var_screeninfo));
1106                var.xres = (specs->max_x * 7200)/254;
1107                var.yres = (specs->max_y * 7200)/254;
1108                m = fb_find_best_mode(&var, head);
1109                if (m) {
1110                        best = m;
1111                        goto finished;
1112                }
1113        }
1114
1115        /* use first detailed mode */
1116        if (md) {
1117                best = md;
1118                goto finished;
1119        }
1120
1121        /* last resort, use the very first mode */
1122        best = m1;
1123finished:
1124        return best;
1125}
1126EXPORT_SYMBOL(fb_find_best_display);
1127
1128EXPORT_SYMBOL(fb_videomode_to_var);
1129EXPORT_SYMBOL(fb_var_to_videomode);
1130EXPORT_SYMBOL(fb_mode_is_equal);
1131EXPORT_SYMBOL(fb_add_videomode);
1132EXPORT_SYMBOL(fb_match_mode);
1133EXPORT_SYMBOL(fb_find_best_mode);
1134EXPORT_SYMBOL(fb_find_nearest_mode);
1135EXPORT_SYMBOL(fb_videomode_to_modelist);
1136EXPORT_SYMBOL(fb_find_mode);
1137EXPORT_SYMBOL(fb_find_mode_cvt);
1138
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