LXR linux/drivers/video/fbdev/core/modedb.c

   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
  32/*
  33 *  Standard video mode definitions (taken from XFree86)
  34 */
  35
  36static const struct fb_videomode modedb[] = {
  37
  38        /* 640x400 @ 70 Hz, 31.5 kHz hsync */
  39        { NULL, 70, 640, 400, 39721, 40, 24, 39, 9, 96, 2, 0,
  40                FB_VMODE_NONINTERLACED },
  41
  42        /* 640x480 @ 60 Hz, 31.5 kHz hsync */
  43        { NULL, 60, 640, 480, 39721, 40, 24, 32, 11, 96, 2,     0,
  44                FB_VMODE_NONINTERLACED },
  45
  46        /* 800x600 @ 56 Hz, 35.15 kHz hsync */
  47        { NULL, 56, 800, 600, 27777, 128, 24, 22, 1, 72, 2,     0,
  48                FB_VMODE_NONINTERLACED },
  49
  50        /* 1024x768 @ 87 Hz interlaced, 35.5 kHz hsync */
  51        { NULL, 87, 1024, 768, 22271, 56, 24, 33, 8, 160, 8, 0,
  52                FB_VMODE_INTERLACED },
  53
  54        /* 640x400 @ 85 Hz, 37.86 kHz hsync */
  55        { NULL, 85, 640, 400, 31746, 96, 32, 41, 1, 64, 3,
  56                FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED },
  57
  58        /* 640x480 @ 72 Hz, 36.5 kHz hsync */
  59        { NULL, 72, 640, 480, 31746, 144, 40, 30, 8, 40, 3, 0,
  60                FB_VMODE_NONINTERLACED },
  61
  62        /* 640x480 @ 75 Hz, 37.50 kHz hsync */
  63        { NULL, 75, 640, 480, 31746, 120, 16, 16, 1, 64, 3,     0,
  64                FB_VMODE_NONINTERLACED },
  65
  66        /* 800x600 @ 60 Hz, 37.8 kHz hsync */
  67        { NULL, 60, 800, 600, 25000, 88, 40, 23, 1, 128, 4,
  68                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  69                FB_VMODE_NONINTERLACED },
  70
  71        /* 640x480 @ 85 Hz, 43.27 kHz hsync */
  72        { NULL, 85, 640, 480, 27777, 80, 56, 25, 1, 56, 3, 0,
  73                FB_VMODE_NONINTERLACED },
  74
  75        /* 1152x864 @ 89 Hz interlaced, 44 kHz hsync */
  76        { NULL, 89, 1152, 864, 15384, 96, 16, 110, 1, 216, 10, 0,
  77                FB_VMODE_INTERLACED },
  78        /* 800x600 @ 72 Hz, 48.0 kHz hsync */
  79        { NULL, 72, 800, 600, 20000, 64, 56, 23, 37, 120, 6,
  80                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  81                FB_VMODE_NONINTERLACED },
  82
  83        /* 1024x768 @ 60 Hz, 48.4 kHz hsync */
  84        { NULL, 60, 1024, 768, 15384, 168, 8, 29, 3, 144, 6, 0,
  85                FB_VMODE_NONINTERLACED },
  86
  87        /* 640x480 @ 100 Hz, 53.01 kHz hsync */
  88        { NULL, 100, 640, 480, 21834, 96, 32, 36, 8, 96, 6,     0,
  89                FB_VMODE_NONINTERLACED },
  90
  91        /* 1152x864 @ 60 Hz, 53.5 kHz hsync */
  92        { NULL, 60, 1152, 864, 11123, 208, 64, 16, 4, 256, 8, 0,
  93                FB_VMODE_NONINTERLACED },
  94
  95        /* 800x600 @ 85 Hz, 55.84 kHz hsync */
  96        { NULL, 85, 800, 600, 16460, 160, 64, 36, 16, 64, 5, 0,
  97                FB_VMODE_NONINTERLACED },
  98
  99        /* 1024x768 @ 70 Hz, 56.5 kHz hsync */
 100        { NULL, 70, 1024, 768, 13333, 144, 24, 29, 3, 136, 6, 0,
 101                FB_VMODE_NONINTERLACED },
 102
 103        /* 1280x1024 @ 87 Hz interlaced, 51 kHz hsync */
 104        { NULL, 87, 1280, 1024, 12500, 56, 16, 128, 1, 216, 12, 0,
 105                FB_VMODE_INTERLACED },
 106
 107        /* 800x600 @ 100 Hz, 64.02 kHz hsync */
 108        { NULL, 100, 800, 600, 14357, 160, 64, 30, 4, 64, 6, 0,
 109                FB_VMODE_NONINTERLACED },
 110
 111        /* 1024x768 @ 76 Hz, 62.5 kHz hsync */
 112        { NULL, 76, 1024, 768, 11764, 208, 8, 36, 16, 120, 3, 0,
 113                FB_VMODE_NONINTERLACED },
 114
 115        /* 1152x864 @ 70 Hz, 62.4 kHz hsync */
 116        { NULL, 70, 1152, 864, 10869, 106, 56, 20, 1, 160, 10, 0,
 117                FB_VMODE_NONINTERLACED },
 118
 119        /* 1280x1024 @ 61 Hz, 64.2 kHz hsync */
 120        { NULL, 61, 1280, 1024, 9090, 200, 48, 26, 1, 184, 3, 0,
 121                FB_VMODE_NONINTERLACED },
 122
 123        /* 1400x1050 @ 60Hz, 63.9 kHz hsync */
 124        { NULL, 60, 1400, 1050, 9259, 136, 40, 13, 1, 112, 3, 0,
 125                FB_VMODE_NONINTERLACED },
 126
 127        /* 1400x1050 @ 75,107 Hz, 82,392 kHz +hsync +vsync*/
 128        { NULL, 75, 1400, 1050, 7190, 120, 56, 23, 10, 112, 13,
 129                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 130                FB_VMODE_NONINTERLACED },
 131
 132        /* 1400x1050 @ 60 Hz, ? kHz +hsync +vsync*/
 133        { NULL, 60, 1400, 1050, 9259, 128, 40, 12, 0, 112, 3,
 134                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 135                FB_VMODE_NONINTERLACED },
 136
 137        /* 1024x768 @ 85 Hz, 70.24 kHz hsync */
 138        { NULL, 85, 1024, 768, 10111, 192, 32, 34, 14, 160, 6, 0,
 139                FB_VMODE_NONINTERLACED },
 140
 141        /* 1152x864 @ 78 Hz, 70.8 kHz hsync */
 142        { NULL, 78, 1152, 864, 9090, 228, 88, 32, 0, 84, 12, 0,
 143                FB_VMODE_NONINTERLACED },
 144
 145        /* 1280x1024 @ 70 Hz, 74.59 kHz hsync */
 146        { NULL, 70, 1280, 1024, 7905, 224, 32, 28, 8, 160, 8, 0,
 147                FB_VMODE_NONINTERLACED },
 148
 149        /* 1600x1200 @ 60Hz, 75.00 kHz hsync */
 150        { NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
 151                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 152                FB_VMODE_NONINTERLACED },
 153
 154        /* 1152x864 @ 84 Hz, 76.0 kHz hsync */
 155        { NULL, 84, 1152, 864, 7407, 184, 312, 32, 0, 128, 12, 0,
 156                FB_VMODE_NONINTERLACED },
 157
 158        /* 1280x1024 @ 74 Hz, 78.85 kHz hsync */
 159        { NULL, 74, 1280, 1024, 7407, 256, 32, 34, 3, 144, 3, 0,
 160                FB_VMODE_NONINTERLACED },
 161
 162        /* 1024x768 @ 100Hz, 80.21 kHz hsync */
 163        { NULL, 100, 1024, 768, 8658, 192, 32, 21, 3, 192, 10, 0,
 164                FB_VMODE_NONINTERLACED },
 165
 166        /* 1280x1024 @ 76 Hz, 81.13 kHz hsync */
 167        { NULL, 76, 1280, 1024, 7407, 248, 32, 34, 3, 104, 3, 0,
 168                FB_VMODE_NONINTERLACED },
 169
 170        /* 1600x1200 @ 70 Hz, 87.50 kHz hsync */
 171        { NULL, 70, 1600, 1200, 5291, 304, 64, 46, 1, 192, 3, 0,
 172                FB_VMODE_NONINTERLACED },
 173
 174        /* 1152x864 @ 100 Hz, 89.62 kHz hsync */
 175        { NULL, 100, 1152, 864, 7264, 224, 32, 17, 2, 128, 19, 0,
 176                FB_VMODE_NONINTERLACED },
 177
 178        /* 1280x1024 @ 85 Hz, 91.15 kHz hsync */
 179        { NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3,
 180                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 181                FB_VMODE_NONINTERLACED },
 182
 183        /* 1600x1200 @ 75 Hz, 93.75 kHz hsync */
 184        { NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3,
 185                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 186                FB_VMODE_NONINTERLACED },
 187
 188        /* 1680x1050 @ 60 Hz, 65.191 kHz hsync */
 189        { NULL, 60, 1680, 1050, 6848, 280, 104, 30, 3, 176, 6,
 190                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 191                FB_VMODE_NONINTERLACED },
 192
 193        /* 1600x1200 @ 85 Hz, 105.77 kHz hsync */
 194        { NULL, 85, 1600, 1200, 4545, 272, 16, 37, 4, 192, 3,
 195                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 196                FB_VMODE_NONINTERLACED },
 197
 198        /* 1280x1024 @ 100 Hz, 107.16 kHz hsync */
 199        { NULL, 100, 1280, 1024, 5502, 256, 32, 26, 7, 128, 15, 0,
 200                FB_VMODE_NONINTERLACED },
 201
 202        /* 1800x1440 @ 64Hz, 96.15 kHz hsync  */
 203        { NULL, 64, 1800, 1440, 4347, 304, 96, 46, 1, 192, 3,
 204                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 205                FB_VMODE_NONINTERLACED },
 206
 207        /* 1800x1440 @ 70Hz, 104.52 kHz hsync  */
 208        { NULL, 70, 1800, 1440, 4000, 304, 96, 46, 1, 192, 3,
 209                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 210                FB_VMODE_NONINTERLACED },
 211
 212        /* 512x384 @ 78 Hz, 31.50 kHz hsync */
 213        { NULL, 78, 512, 384, 49603, 48, 16, 16, 1, 64, 3, 0,
 214                FB_VMODE_NONINTERLACED },
 215
 216        /* 512x384 @ 85 Hz, 34.38 kHz hsync */
 217        { NULL, 85, 512, 384, 45454, 48, 16, 16, 1, 64, 3, 0,
 218                FB_VMODE_NONINTERLACED },
 219
 220        /* 320x200 @ 70 Hz, 31.5 kHz hsync, 8:5 aspect ratio */
 221        { NULL, 70, 320, 200, 79440, 16, 16, 20, 4, 48, 1, 0,
 222                FB_VMODE_DOUBLE },
 223
 224        /* 320x240 @ 60 Hz, 31.5 kHz hsync, 4:3 aspect ratio */
 225        { NULL, 60, 320, 240, 79440, 16, 16, 16, 5, 48, 1, 0,
 226                FB_VMODE_DOUBLE },
 227
 228        /* 320x240 @ 72 Hz, 36.5 kHz hsync */
 229        { NULL, 72, 320, 240, 63492, 16, 16, 16, 4, 48, 2, 0,
 230                FB_VMODE_DOUBLE },
 231
 232        /* 400x300 @ 56 Hz, 35.2 kHz hsync, 4:3 aspect ratio */
 233        { NULL, 56, 400, 300, 55555, 64, 16, 10, 1, 32, 1, 0,
 234                FB_VMODE_DOUBLE },
 235
 236        /* 400x300 @ 60 Hz, 37.8 kHz hsync */
 237        { NULL, 60, 400, 300, 50000, 48, 16, 11, 1, 64, 2, 0,
 238                FB_VMODE_DOUBLE },
 239
 240        /* 400x300 @ 72 Hz, 48.0 kHz hsync */
 241        { NULL, 72, 400, 300, 40000, 32, 24, 11, 19, 64, 3,     0,
 242                FB_VMODE_DOUBLE },
 243
 244        /* 480x300 @ 56 Hz, 35.2 kHz hsync, 8:5 aspect ratio */
 245        { NULL, 56, 480, 300, 46176, 80, 16, 10, 1, 40, 1, 0,
 246                FB_VMODE_DOUBLE },
 247
 248        /* 480x300 @ 60 Hz, 37.8 kHz hsync */
 249        { NULL, 60, 480, 300, 41858, 56, 16, 11, 1, 80, 2, 0,
 250                FB_VMODE_DOUBLE },
 251
 252        /* 480x300 @ 63 Hz, 39.6 kHz hsync */
 253        { NULL, 63, 480, 300, 40000, 56, 16, 11, 1, 80, 2, 0,
 254                FB_VMODE_DOUBLE },
 255
 256        /* 480x300 @ 72 Hz, 48.0 kHz hsync */
 257        { NULL, 72, 480, 300, 33386, 40, 24, 11, 19, 80, 3, 0,
 258                FB_VMODE_DOUBLE },
 259
 260        /* 1920x1200 @ 60 Hz, 74.5 Khz hsync */
 261        { NULL, 60, 1920, 1200, 5177, 128, 336, 1, 38, 208, 3,
 262                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 263                FB_VMODE_NONINTERLACED },
 264
 265        /* 1152x768, 60 Hz, PowerBook G4 Titanium I and II */
 266        { NULL, 60, 1152, 768, 14047, 158, 26, 29, 3, 136, 6,
 267                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 268                FB_VMODE_NONINTERLACED },
 269
 270        /* 1366x768, 60 Hz, 47.403 kHz hsync, WXGA 16:9 aspect ratio */
 271        { NULL, 60, 1366, 768, 13806, 120, 10, 14, 3, 32, 5, 0,
 272                FB_VMODE_NONINTERLACED },
 273
 274        /* 1280x800, 60 Hz, 47.403 kHz hsync, WXGA 16:10 aspect ratio */
 275        { NULL, 60, 1280, 800, 12048, 200, 64, 24, 1, 136, 3, 0,
 276                FB_VMODE_NONINTERLACED },
 277
 278        /* 720x576i @ 50 Hz, 15.625 kHz hsync (PAL RGB) */
 279        { NULL, 50, 720, 576, 74074, 64, 16, 39, 5, 64, 5, 0,
 280                FB_VMODE_INTERLACED },
 281
 282        /* 800x520i @ 50 Hz, 15.625 kHz hsync (PAL RGB) */
 283        { NULL, 50, 800, 520, 58823, 144, 64, 72, 28, 80, 5, 0,
 284                FB_VMODE_INTERLACED },
 285
 286        /* 864x480 @ 60 Hz, 35.15 kHz hsync */
 287        { NULL, 60, 864, 480, 27777, 1, 1, 1, 1, 0, 0,
 288                0, FB_VMODE_NONINTERLACED },
 289};
 290
 291#ifdef CONFIG_FB_MODE_HELPERS
 292const struct fb_videomode vesa_modes[] = {
 293        /* 0 640x350-85 VESA */
 294        { NULL, 85, 640, 350, 31746,  96, 32, 60, 32, 64, 3,
 295          FB_SYNC_HOR_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA},
 296        /* 1 640x400-85 VESA */
 297        { NULL, 85, 640, 400, 31746,  96, 32, 41, 01, 64, 3,
 298          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 299        /* 2 720x400-85 VESA */
 300        { NULL, 85, 721, 400, 28169, 108, 36, 42, 01, 72, 3,
 301          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 302        /* 3 640x480-60 VESA */
 303        { NULL, 60, 640, 480, 39682,  48, 16, 33, 10, 96, 2,
 304          0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 305        /* 4 640x480-72 VESA */
 306        { NULL, 72, 640, 480, 31746, 128, 24, 29, 9, 40, 2,
 307          0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 308        /* 5 640x480-75 VESA */
 309        { NULL, 75, 640, 480, 31746, 120, 16, 16, 01, 64, 3,
 310          0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 311        /* 6 640x480-85 VESA */
 312        { NULL, 85, 640, 480, 27777, 80, 56, 25, 01, 56, 3,
 313          0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 314        /* 7 800x600-56 VESA */
 315        { NULL, 56, 800, 600, 27777, 128, 24, 22, 01, 72, 2,
 316          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 317          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 318        /* 8 800x600-60 VESA */
 319        { NULL, 60, 800, 600, 25000, 88, 40, 23, 01, 128, 4,
 320          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 321          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 322        /* 9 800x600-72 VESA */
 323        { NULL, 72, 800, 600, 20000, 64, 56, 23, 37, 120, 6,
 324          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 325          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 326        /* 10 800x600-75 VESA */
 327        { NULL, 75, 800, 600, 20202, 160, 16, 21, 01, 80, 3,
 328          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 329          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 330        /* 11 800x600-85 VESA */
 331        { NULL, 85, 800, 600, 17761, 152, 32, 27, 01, 64, 3,
 332          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 333          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 334        /* 12 1024x768i-43 VESA */
 335        { NULL, 43, 1024, 768, 22271, 56, 8, 41, 0, 176, 8,
 336          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 337          FB_VMODE_INTERLACED, FB_MODE_IS_VESA },
 338        /* 13 1024x768-60 VESA */
 339        { NULL, 60, 1024, 768, 15384, 160, 24, 29, 3, 136, 6,
 340          0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 341        /* 14 1024x768-70 VESA */
 342        { NULL, 70, 1024, 768, 13333, 144, 24, 29, 3, 136, 6,
 343          0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 344        /* 15 1024x768-75 VESA */
 345        { NULL, 75, 1024, 768, 12690, 176, 16, 28, 1, 96, 3,
 346          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 347          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 348        /* 16 1024x768-85 VESA */
 349        { NULL, 85, 1024, 768, 10582, 208, 48, 36, 1, 96, 3,
 350          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 351          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 352        /* 17 1152x864-75 VESA */
 353        { NULL, 75, 1152, 864, 9259, 256, 64, 32, 1, 128, 3,
 354          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 355          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 356        /* 18 1280x960-60 VESA */
 357        { NULL, 60, 1280, 960, 9259, 312, 96, 36, 1, 112, 3,
 358          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 359          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 360        /* 19 1280x960-85 VESA */
 361        { NULL, 85, 1280, 960, 6734, 224, 64, 47, 1, 160, 3,
 362          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 363          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 364        /* 20 1280x1024-60 VESA */
 365        { NULL, 60, 1280, 1024, 9259, 248, 48, 38, 1, 112, 3,
 366          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 367          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 368        /* 21 1280x1024-75 VESA */
 369        { NULL, 75, 1280, 1024, 7407, 248, 16, 38, 1, 144, 3,
 370          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 371          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 372        /* 22 1280x1024-85 VESA */
 373        { NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3,
 374          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 375          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 376        /* 23 1600x1200-60 VESA */
 377        { NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
 378          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 379          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 380        /* 24 1600x1200-65 VESA */
 381        { NULL, 65, 1600, 1200, 5698, 304,  64, 46, 1, 192, 3,
 382          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 383          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 384        /* 25 1600x1200-70 VESA */
 385        { NULL, 70, 1600, 1200, 5291, 304, 64, 46, 1, 192, 3,
 386          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 387          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 388        /* 26 1600x1200-75 VESA */
 389        { NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3,
 390          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 391          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 392        /* 27 1600x1200-85 VESA */
 393        { NULL, 85, 1600, 1200, 4357, 304, 64, 46, 1, 192, 3,
 394          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 395          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 396        /* 28 1792x1344-60 VESA */
 397        { NULL, 60, 1792, 1344, 4882, 328, 128, 46, 1, 200, 3,
 398          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 399        /* 29 1792x1344-75 VESA */
 400        { NULL, 75, 1792, 1344, 3831, 352, 96, 69, 1, 216, 3,
 401          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 402        /* 30 1856x1392-60 VESA */
 403        { NULL, 60, 1856, 1392, 4580, 352, 96, 43, 1, 224, 3,
 404          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 405        /* 31 1856x1392-75 VESA */
 406        { NULL, 75, 1856, 1392, 3472, 352, 128, 104, 1, 224, 3,
 407          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 408        /* 32 1920x1440-60 VESA */
 409        { NULL, 60, 1920, 1440, 4273, 344, 128, 56, 1, 200, 3,
 410          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 411        /* 33 1920x1440-75 VESA */
 412        { NULL, 75, 1920, 1440, 3367, 352, 144, 56, 1, 224, 3,
 413          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 414        /* 34 1920x1200-60 RB VESA */
 415        { NULL, 60, 1920, 1200, 6493, 80, 48, 26, 3, 32, 6,
 416          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 417        /* 35 1920x1200-60 VESA */
 418        { NULL, 60, 1920, 1200, 5174, 336, 136, 36, 3, 200, 6,
 419          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 420        /* 36 1920x1200-75 VESA */
 421        { NULL, 75, 1920, 1200, 4077, 344, 136, 46, 3, 208, 6,
 422          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 423        /* 37 1920x1200-85 VESA */
 424        { NULL, 85, 1920, 1200, 3555, 352, 144, 53, 3, 208, 6,
 425          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 426        /* 38 2560x1600-60 RB VESA */
 427        { NULL, 60, 2560, 1600, 3724, 80, 48, 37, 3, 32, 6,
 428          FB_SYNC_HOR_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 429        /* 39 2560x1600-60 VESA */
 430        { NULL, 60, 2560, 1600, 2869, 472, 192, 49, 3, 280, 6,
 431          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 432        /* 40 2560x1600-75 VESA */
 433        { NULL, 75, 2560, 1600, 2256, 488, 208, 63, 3, 280, 6,
 434          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 435        /* 41 2560x1600-85 VESA */
 436        { NULL, 85, 2560, 1600, 1979, 488, 208, 73, 3, 280, 6,
 437          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 438        /* 42 2560x1600-120 RB VESA */
 439        { NULL, 120, 2560, 1600, 1809, 80, 48, 85, 3, 32, 6,
 440          FB_SYNC_HOR_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 441};
 442EXPORT_SYMBOL(vesa_modes);
 443
 444const struct dmt_videomode dmt_modes[DMT_SIZE] = {
 445        { 0x01, 0x0000, 0x000000, &vesa_modes[0] },
 446        { 0x02, 0x3119, 0x000000, &vesa_modes[1] },
 447        { 0x03, 0x0000, 0x000000, &vesa_modes[2] },
 448        { 0x04, 0x3140, 0x000000, &vesa_modes[3] },
 449        { 0x05, 0x314c, 0x000000, &vesa_modes[4] },
 450        { 0x06, 0x314f, 0x000000, &vesa_modes[5] },
 451        { 0x07, 0x3159, 0x000000, &vesa_modes[6] },
 452        { 0x08, 0x0000, 0x000000, &vesa_modes[7] },
 453        { 0x09, 0x4540, 0x000000, &vesa_modes[8] },
 454        { 0x0a, 0x454c, 0x000000, &vesa_modes[9] },
 455        { 0x0b, 0x454f, 0x000000, &vesa_modes[10] },
 456        { 0x0c, 0x4559, 0x000000, &vesa_modes[11] },
 457        { 0x0d, 0x0000, 0x000000, NULL },
 458        { 0x0e, 0x0000, 0x000000, NULL },
 459        { 0x0f, 0x0000, 0x000000, &vesa_modes[12] },
 460        { 0x10, 0x6140, 0x000000, &vesa_modes[13] },
 461        { 0x11, 0x614a, 0x000000, &vesa_modes[14] },
 462        { 0x12, 0x614f, 0x000000, &vesa_modes[15] },
 463        { 0x13, 0x6159, 0x000000, &vesa_modes[16] },
 464        { 0x14, 0x0000, 0x000000, NULL },
 465        { 0x15, 0x714f, 0x000000, &vesa_modes[17] },
 466        { 0x16, 0x0000, 0x7f1c21, NULL },
 467        { 0x17, 0x0000, 0x7f1c28, NULL },
 468        { 0x18, 0x0000, 0x7f1c44, NULL },
 469        { 0x19, 0x0000, 0x7f1c62, NULL },
 470        { 0x1a, 0x0000, 0x000000, NULL },
 471        { 0x1b, 0x0000, 0x8f1821, NULL },
 472        { 0x1c, 0x8100, 0x8f1828, NULL },
 473        { 0x1d, 0x810f, 0x8f1844, NULL },
 474        { 0x1e, 0x8119, 0x8f1862, NULL },
 475        { 0x1f, 0x0000, 0x000000, NULL },
 476        { 0x20, 0x8140, 0x000000, &vesa_modes[18] },
 477        { 0x21, 0x8159, 0x000000, &vesa_modes[19] },
 478        { 0x22, 0x0000, 0x000000, NULL },
 479        { 0x23, 0x8180, 0x000000, &vesa_modes[20] },
 480        { 0x24, 0x818f, 0x000000, &vesa_modes[21] },
 481        { 0x25, 0x8199, 0x000000, &vesa_modes[22] },
 482        { 0x26, 0x0000, 0x000000, NULL },
 483        { 0x27, 0x0000, 0x000000, NULL },
 484        { 0x28, 0x0000, 0x000000, NULL },
 485        { 0x29, 0x0000, 0x0c2021, NULL },
 486        { 0x2a, 0x9040, 0x0c2028, NULL },
 487        { 0x2b, 0x904f, 0x0c2044, NULL },
 488        { 0x2c, 0x9059, 0x0c2062, NULL },
 489        { 0x2d, 0x0000, 0x000000, NULL },
 490        { 0x2e, 0x9500, 0xc11821, NULL },
 491        { 0x2f, 0x9500, 0xc11828, NULL },
 492        { 0x30, 0x950f, 0xc11844, NULL },
 493        { 0x31, 0x9519, 0xc11868, NULL },
 494        { 0x32, 0x0000, 0x000000, NULL },
 495        { 0x33, 0xa940, 0x000000, &vesa_modes[23] },
 496        { 0x34, 0xa945, 0x000000, &vesa_modes[24] },
 497        { 0x35, 0xa94a, 0x000000, &vesa_modes[25] },
 498        { 0x36, 0xa94f, 0x000000, &vesa_modes[26] },
 499        { 0x37, 0xa959, 0x000000, &vesa_modes[27] },
 500        { 0x38, 0x0000, 0x000000, NULL },
 501        { 0x39, 0x0000, 0x0c2821, NULL },
 502        { 0x3a, 0xb300, 0x0c2828, NULL },
 503        { 0x3b, 0xb30f, 0x0c2844, NULL },
 504        { 0x3c, 0xb319, 0x0c2868, NULL },
 505        { 0x3d, 0x0000, 0x000000, NULL },
 506        { 0x3e, 0xc140, 0x000000, &vesa_modes[28] },
 507        { 0x3f, 0xc14f, 0x000000, &vesa_modes[29] },
 508        { 0x40, 0x0000, 0x000000, NULL},
 509        { 0x41, 0xc940, 0x000000, &vesa_modes[30] },
 510        { 0x42, 0xc94f, 0x000000, &vesa_modes[31] },
 511        { 0x43, 0x0000, 0x000000, NULL },
 512        { 0x44, 0x0000, 0x572821, &vesa_modes[34] },
 513        { 0x45, 0xd100, 0x572828, &vesa_modes[35] },
 514        { 0x46, 0xd10f, 0x572844, &vesa_modes[36] },
 515        { 0x47, 0xd119, 0x572862, &vesa_modes[37] },
 516        { 0x48, 0x0000, 0x000000, NULL },
 517        { 0x49, 0xd140, 0x000000, &vesa_modes[32] },
 518        { 0x4a, 0xd14f, 0x000000, &vesa_modes[33] },
 519        { 0x4b, 0x0000, 0x000000, NULL },
 520        { 0x4c, 0x0000, 0x1f3821, &vesa_modes[38] },
 521        { 0x4d, 0x0000, 0x1f3828, &vesa_modes[39] },
 522        { 0x4e, 0x0000, 0x1f3844, &vesa_modes[40] },
 523        { 0x4f, 0x0000, 0x1f3862, &vesa_modes[41] },
 524        { 0x50, 0x0000, 0x000000, &vesa_modes[42] },
 525};
 526EXPORT_SYMBOL(dmt_modes);
 527#endif /* CONFIG_FB_MODE_HELPERS */
 528
 529/**
 530 *      fb_try_mode - test a video mode
 531 *      @var: frame buffer user defined part of display
 532 *      @info: frame buffer info structure
 533 *      @mode: frame buffer video mode structure
 534 *      @bpp: color depth in bits per pixel
 535 *
 536 *      Tries a video mode to test it's validity for device @info.
 537 *
 538 *      Returns 1 on success.
 539 *
 540 */
 541
 542static int fb_try_mode(struct fb_var_screeninfo *var, struct fb_info *info,
 543                       const struct fb_videomode *mode, unsigned int bpp)
 544{
 545        int err = 0;
 546
 547        DPRINTK("Trying mode %s %dx%d-%d@%d\n",
 548                mode->name ? mode->name : "noname",
 549                mode->xres, mode->yres, bpp, mode->refresh);
 550        var->xres = mode->xres;
 551        var->yres = mode->yres;
 552        var->xres_virtual = mode->xres;
 553        var->yres_virtual = mode->yres;
 554        var->xoffset = 0;
 555        var->yoffset = 0;
 556        var->bits_per_pixel = bpp;
 557        var->activate |= FB_ACTIVATE_TEST;
 558        var->pixclock = mode->pixclock;
 559        var->left_margin = mode->left_margin;
 560        var->right_margin = mode->right_margin;
 561        var->upper_margin = mode->upper_margin;
 562        var->lower_margin = mode->lower_margin;
 563        var->hsync_len = mode->hsync_len;
 564        var->vsync_len = mode->vsync_len;
 565        var->sync = mode->sync;
 566        var->vmode = mode->vmode;
 567        if (info->fbops->fb_check_var)
 568                err = info->fbops->fb_check_var(var, info);
 569        var->activate &= ~FB_ACTIVATE_TEST;
 570        return err;
 571}
 572
 573/**
 574 * fb_find_mode - finds a valid video mode
 575 * @var: frame buffer user defined part of display
 576 * @info: frame buffer info structure
 577 * @mode_option: string video mode to find
 578 * @db: video mode database
 579 * @dbsize: size of @db
 580 * @default_mode: default video mode to fall back to
 581 * @default_bpp: default color depth in bits per pixel
 582 *
 583 * Finds a suitable video mode, starting with the specified mode
 584 * in @mode_option with fallback to @default_mode.  If
 585 * @default_mode fails, all modes in the video mode database will
 586 * be tried.
 587 *
 588 * Valid mode specifiers for @mode_option::
 589 *
 590 *     <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][p][m]
 591 *
 592 * or ::
 593 *
 594 *     <name>[-<bpp>][@<refresh>]
 595 *
 596 * with <xres>, <yres>, <bpp> and <refresh> decimal numbers and
 597 * <name> a string.
 598 *
 599 * If 'M' is present after yres (and before refresh/bpp if present),
 600 * the function will compute the timings using VESA(tm) Coordinated
 601 * Video Timings (CVT).  If 'R' is present after 'M', will compute with
 602 * reduced blanking (for flatpanels).  If 'i' or 'p' are present, compute
 603 * interlaced or progressive mode.  If 'm' is present, add margins equal
 604 * to 1.8% of xres rounded down to 8 pixels, and 1.8% of yres. The char
 605 * 'i', 'p' and 'm' must be after 'M' and 'R'. Example::
 606 *
 607 *     1024x768MR-8@60m - Reduced blank with margins at 60Hz.
 608 *
 609 * NOTE: The passed struct @var is _not_ cleared!  This allows you
 610 * to supply values for e.g. the grayscale and accel_flags fields.
 611 *
 612 * Returns zero for failure, 1 if using specified @mode_option,
 613 * 2 if using specified @mode_option with an ignored refresh rate,
 614 * 3 if default mode is used, 4 if fall back to any valid mode.
 615 */
 616
 617int fb_find_mode(struct fb_var_screeninfo *var,
 618                 struct fb_info *info, const char *mode_option,
 619                 const struct fb_videomode *db, unsigned int dbsize,
 620                 const struct fb_videomode *default_mode,
 621                 unsigned int default_bpp)
 622{
 623        int i;
 624
 625        /* Set up defaults */
 626        if (!db) {
 627                db = modedb;
 628                dbsize = ARRAY_SIZE(modedb);
 629        }
 630
 631        if (!default_mode)
 632                default_mode = &db[0];
 633
 634        if (!default_bpp)
 635                default_bpp = 8;
 636
 637        /* Did the user specify a video mode? */
 638        if (!mode_option)
 639                mode_option = fb_mode_option;
 640        if (mode_option) {
 641                const char *name = mode_option;
 642                unsigned int namelen = strlen(name);
 643                int res_specified = 0, bpp_specified = 0, refresh_specified = 0;
 644                unsigned int xres = 0, yres = 0, bpp = default_bpp, refresh = 0;
 645                int yres_specified = 0, cvt = 0, rb = 0;
 646                int interlace_specified = 0, interlace = 0;
 647                int margins = 0;
 648                u32 best, diff, tdiff;
 649
 650                for (i = namelen-1; i >= 0; i--) {
 651                        switch (name[i]) {
 652                        case '@':
 653                                namelen = i;
 654                                if (!refresh_specified && !bpp_specified &&
 655                                    !yres_specified) {
 656                                        refresh = simple_strtol(&name[i+1], NULL,
 657                                                                10);
 658                                        refresh_specified = 1;
 659                                        if (cvt || rb)
 660                                                cvt = 0;
 661                                } else
 662                                        goto done;
 663                                break;
 664                        case '-':
 665                                namelen = i;
 666                                if (!bpp_specified && !yres_specified) {
 667                                        bpp = simple_strtol(&name[i+1], NULL,
 668                                                            10);
 669                                        bpp_specified = 1;
 670                                        if (cvt || rb)
 671                                                cvt = 0;
 672                                } else
 673                                        goto done;
 674                                break;
 675                        case 'x':
 676                                if (!yres_specified) {
 677                                        yres = simple_strtol(&name[i+1], NULL,
 678                                                             10);
 679                                        yres_specified = 1;
 680                                } else
 681                                        goto done;
 682                                break;
 683                        case '0' ... '9':
 684                                break;
 685                        case 'M':
 686                                if (!yres_specified)
 687                                        cvt = 1;
 688                                break;
 689                        case 'R':
 690                                if (!cvt)
 691                                        rb = 1;
 692                                break;
 693                        case 'm':
 694                                if (!cvt)
 695                                        margins = 1;
 696                                break;
 697                        case 'p':
 698                                if (!cvt) {
 699                                        interlace = 0;
 700                                        interlace_specified = 1;
 701                                }
 702                                break;
 703                        case 'i':
 704                                if (!cvt) {
 705                                        interlace = 1;
 706                                        interlace_specified = 1;
 707                                }
 708                                break;
 709                        default:
 710                                goto done;
 711                        }
 712                }
 713                if (i < 0 && yres_specified) {
 714                        xres = simple_strtol(name, NULL, 10);
 715                        res_specified = 1;
 716                }
 717done:
 718                if (cvt) {
 719                        struct fb_videomode cvt_mode;
 720                        int ret;
 721
 722                        DPRINTK("CVT mode %dx%d@%dHz%s%s%s\n", xres, yres,
 723                                (refresh) ? refresh : 60,
 724                                (rb) ? " reduced blanking" : "",
 725                                (margins) ? " with margins" : "",
 726                                (interlace) ? " interlaced" : "");
 727
 728                        memset(&cvt_mode, 0, sizeof(cvt_mode));
 729                        cvt_mode.xres = xres;
 730                        cvt_mode.yres = yres;
 731                        cvt_mode.refresh = (refresh) ? refresh : 60;
 732
 733                        if (interlace)
 734                                cvt_mode.vmode |= FB_VMODE_INTERLACED;
 735                        else
 736                                cvt_mode.vmode &= ~FB_VMODE_INTERLACED;
 737
 738                        ret = fb_find_mode_cvt(&cvt_mode, margins, rb);
 739
 740                        if (!ret && !fb_try_mode(var, info, &cvt_mode, bpp)) {
 741                                DPRINTK("modedb CVT: CVT mode ok\n");
 742                                return 1;
 743                        }
 744
 745                        DPRINTK("CVT mode invalid, getting mode from database\n");
 746                }
 747
 748                DPRINTK("Trying specified video mode%s %ix%i\n",
 749                        refresh_specified ? "" : " (ignoring refresh rate)",
 750                        xres, yres);
 751
 752                if (!refresh_specified) {
 753                        /*
 754                         * If the caller has provided a custom mode database and
 755                         * a valid monspecs structure, we look for the mode with
 756                         * the highest refresh rate.  Otherwise we play it safe
 757                         * it and try to find a mode with a refresh rate closest
 758                         * to the standard 60 Hz.
 759                         */
 760                        if (db != modedb &&
 761                            info->monspecs.vfmin && info->monspecs.vfmax &&
 762                            info->monspecs.hfmin && info->monspecs.hfmax &&
 763                            info->monspecs.dclkmax) {
 764                                refresh = 1000;
 765                        } else {
 766                                refresh = 60;
 767                        }
 768                }
 769
 770                diff = -1;
 771                best = -1;
 772                for (i = 0; i < dbsize; i++) {
 773                        if ((name_matches(db[i], name, namelen) ||
 774                             (res_specified && res_matches(db[i], xres, yres))) &&
 775                            !fb_try_mode(var, info, &db[i], bpp)) {
 776                                const int db_interlace = (db[i].vmode &
 777                                        FB_VMODE_INTERLACED ? 1 : 0);
 778                                int score = abs(db[i].refresh - refresh);
 779
 780                                if (interlace_specified)
 781                                        score += abs(db_interlace - interlace);
 782
 783                                if (!interlace_specified ||
 784                                    db_interlace == interlace)
 785                                        if (refresh_specified &&
 786                                            db[i].refresh == refresh)
 787                                                return 1;
 788
 789                                if (score < diff) {
 790                                        diff = score;
 791                                        best = i;
 792                                }
 793                        }
 794                }
 795                if (best != -1) {
 796                        fb_try_mode(var, info, &db[best], bpp);
 797                        return (refresh_specified) ? 2 : 1;
 798                }
 799
 800                diff = 2 * (xres + yres);
 801                best = -1;
 802                DPRINTK("Trying best-fit modes\n");
 803                for (i = 0; i < dbsize; i++) {
 804                        DPRINTK("Trying %ix%i\n", db[i].xres, db[i].yres);
 805                        if (!fb_try_mode(var, info, &db[i], bpp)) {
 806                                tdiff = abs(db[i].xres - xres) +
 807                                        abs(db[i].yres - yres);
 808
 809                                /*
 810                                 * Penalize modes with resolutions smaller
 811                                 * than requested.
 812                                 */
 813                                if (xres > db[i].xres || yres > db[i].yres)
 814                                        tdiff += xres + yres;
 815
 816                                if (diff > tdiff) {
 817                                        diff = tdiff;
 818                                        best = i;
 819                                }
 820                        }
 821                }
 822                if (best != -1) {
 823                        fb_try_mode(var, info, &db[best], bpp);
 824                        return 5;
 825                }
 826        }
 827
 828        DPRINTK("Trying default video mode\n");
 829        if (!fb_try_mode(var, info, default_mode, default_bpp))
 830                return 3;
 831
 832        DPRINTK("Trying all modes\n");
 833        for (i = 0; i < dbsize; i++)
 834                if (!fb_try_mode(var, info, &db[i], default_bpp))
 835                        return 4;
 836
 837        DPRINTK("No valid mode found\n");
 838        return 0;
 839}
 840
 841/**
 842 * fb_var_to_videomode - convert fb_var_screeninfo to fb_videomode
 843 * @mode: pointer to struct fb_videomode
 844 * @var: pointer to struct fb_var_screeninfo
 845 */
 846void fb_var_to_videomode(struct fb_videomode *mode,
 847                         const struct fb_var_screeninfo *var)
 848{
 849        u32 pixclock, hfreq, htotal, vtotal;
 850
 851        mode->name = NULL;
 852        mode->xres = var->xres;
 853        mode->yres = var->yres;
 854        mode->pixclock = var->pixclock;
 855        mode->hsync_len = var->hsync_len;
 856        mode->vsync_len = var->vsync_len;
 857        mode->left_margin = var->left_margin;
 858        mode->right_margin = var->right_margin;
 859        mode->upper_margin = var->upper_margin;
 860        mode->lower_margin = var->lower_margin;
 861        mode->sync = var->sync;
 862        mode->vmode = var->vmode & FB_VMODE_MASK;
 863        mode->flag = FB_MODE_IS_FROM_VAR;
 864        mode->refresh = 0;
 865
 866        if (!var->pixclock)
 867                return;
 868
 869        pixclock = PICOS2KHZ(var->pixclock) * 1000;
 870
 871        htotal = var->xres + var->right_margin + var->hsync_len +
 872                var->left_margin;
 873        vtotal = var->yres + var->lower_margin + var->vsync_len +
 874                var->upper_margin;
 875
 876        if (var->vmode & FB_VMODE_INTERLACED)
 877                vtotal /= 2;
 878        if (var->vmode & FB_VMODE_DOUBLE)
 879                vtotal *= 2;
 880
 881        if (!htotal || !vtotal)
 882                return;
 883
 884        hfreq = pixclock/htotal;
 885        mode->refresh = hfreq/vtotal;
 886}
 887
 888/**
 889 * fb_videomode_to_var - convert fb_videomode to fb_var_screeninfo
 890 * @var: pointer to struct fb_var_screeninfo
 891 * @mode: pointer to struct fb_videomode
 892 */
 893void fb_videomode_to_var(struct fb_var_screeninfo *var,
 894                         const struct fb_videomode *mode)
 895{
 896        var->xres = mode->xres;
 897        var->yres = mode->yres;
 898        var->xres_virtual = mode->xres;
 899        var->yres_virtual = mode->yres;
 900        var->xoffset = 0;
 901        var->yoffset = 0;
 902        var->pixclock = mode->pixclock;
 903        var->left_margin = mode->left_margin;
 904        var->right_margin = mode->right_margin;
 905        var->upper_margin = mode->upper_margin;
 906        var->lower_margin = mode->lower_margin;
 907        var->hsync_len = mode->hsync_len;
 908        var->vsync_len = mode->vsync_len;
 909        var->sync = mode->sync;
 910        var->vmode = mode->vmode & FB_VMODE_MASK;
 911}
 912
 913/**
 914 * fb_mode_is_equal - compare 2 videomodes
 915 * @mode1: first videomode
 916 * @mode2: second videomode
 917 *
 918 * RETURNS:
 919 * 1 if equal, 0 if not
 920 */
 921int fb_mode_is_equal(const struct fb_videomode *mode1,
 922                     const struct fb_videomode *mode2)
 923{
 924        return (mode1->xres         == mode2->xres &&
 925                mode1->yres         == mode2->yres &&
 926                mode1->pixclock     == mode2->pixclock &&
 927                mode1->hsync_len    == mode2->hsync_len &&
 928                mode1->vsync_len    == mode2->vsync_len &&
 929                mode1->left_margin  == mode2->left_margin &&
 930                mode1->right_margin == mode2->right_margin &&
 931                mode1->upper_margin == mode2->upper_margin &&
 932                mode1->lower_margin == mode2->lower_margin &&
 933                mode1->sync         == mode2->sync &&
 934                mode1->vmode        == mode2->vmode);
 935}
 936
 937/**
 938 * fb_find_best_mode - find best matching videomode
 939 * @var: pointer to struct fb_var_screeninfo
 940 * @head: pointer to struct list_head of modelist
 941 *
 942 * RETURNS:
 943 * struct fb_videomode, NULL if none found
 944 *
 945 * IMPORTANT:
 946 * This function assumes that all modelist entries in
 947 * info->modelist are valid.
 948 *
 949 * NOTES:
 950 * Finds best matching videomode which has an equal or greater dimension than
 951 * var->xres and var->yres.  If more than 1 videomode is found, will return
 952 * the videomode with the highest refresh rate
 953 */
 954const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var,
 955                                             struct list_head *head)
 956{
 957        struct list_head *pos;
 958        struct fb_modelist *modelist;
 959        struct fb_videomode *mode, *best = NULL;
 960        u32 diff = -1;
 961
 962        list_for_each(pos, head) {
 963                u32 d;
 964
 965                modelist = list_entry(pos, struct fb_modelist, list);
 966                mode = &modelist->mode;
 967
 968                if (mode->xres >= var->xres && mode->yres >= var->yres) {
 969                        d = (mode->xres - var->xres) +
 970                                (mode->yres - var->yres);
 971                        if (diff > d) {
 972                                diff = d;
 973                                best = mode;
 974                        } else if (diff == d && best &&
 975                                   mode->refresh > best->refresh)
 976                                best = mode;
 977                }
 978        }
 979        return best;
 980}
 981
 982/**
 983 * fb_find_nearest_mode - find closest videomode
 984 *
 985 * @mode: pointer to struct fb_videomode
 986 * @head: pointer to modelist
 987 *
 988 * Finds best matching videomode, smaller or greater in dimension.
 989 * If more than 1 videomode is found, will return the videomode with
 990 * the closest refresh rate.
 991 */
 992const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode,
 993                                                struct list_head *head)
 994{
 995        struct list_head *pos;
 996        struct fb_modelist *modelist;
 997        struct fb_videomode *cmode, *best = NULL;
 998        u32 diff = -1, diff_refresh = -1;
 999
1000        list_for_each(pos, head) {

1001                u32 d;
1002
1003                modelist = list_entry(pos, struct fb_modelist, list);
1004                cmode = &modelist->mode;
1005
1006                d = abs(cmode->xres - mode->xres) +
1007                        abs(cmode->yres - mode->yres);
1008                if (diff > d) {
1009                        diff = d;
1010                        diff_refresh = abs(cmode->refresh - mode->refresh);
1011                        best = cmode;
1012                } else if (diff == d) {
1013                        d = abs(cmode->refresh - mode->refresh);
1014                        if (diff_refresh > d) {
1015                                diff_refresh = d;
1016                                best = cmode;
1017                        }
1018                }
1019        }
1020
1021        return best;
1022}
1023
1024/**
1025 * fb_match_mode - find a videomode which exactly matches the timings in var
1026 * @var: pointer to struct fb_var_screeninfo
1027 * @head: pointer to struct list_head of modelist
1028 *
1029 * RETURNS:
1030 * struct fb_videomode, NULL if none found
1031 */
1032const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var,
1033                                         struct list_head *head)
1034{
1035        struct list_head *pos;
1036        struct fb_modelist *modelist;
1037        struct fb_videomode *m, mode;
1038
1039        fb_var_to_videomode(&mode, var);
1040        list_for_each(pos, head) {
1041                modelist = list_entry(pos, struct fb_modelist, list);
1042                m = &modelist->mode;
1043                if (fb_mode_is_equal(m, &mode))
1044                        return m;
1045        }
1046        return NULL;
1047}
1048
1049/**
1050 * fb_add_videomode - adds videomode entry to modelist
1051 * @mode: videomode to add
1052 * @head: struct list_head of modelist
1053 *
1054 * NOTES:
1055 * Will only add unmatched mode entries
1056 */
1057int fb_add_videomode(const struct fb_videomode *mode, struct list_head *head)
1058{
1059        struct list_head *pos;
1060        struct fb_modelist *modelist;
1061        struct fb_videomode *m;
1062        int found = 0;
1063
1064        list_for_each(pos, head) {
1065                modelist = list_entry(pos, struct fb_modelist, list);
1066                m = &modelist->mode;
1067                if (fb_mode_is_equal(m, mode)) {
1068                        found = 1;
1069                        break;
1070                }
1071        }
1072        if (!found) {
1073                modelist = kmalloc(sizeof(struct fb_modelist),
1074                                                  GFP_KERNEL);
1075
1076                if (!modelist)
1077                        return -ENOMEM;
1078                modelist->mode = *mode;
1079                list_add(&modelist->list, head);
1080        }
1081        return 0;
1082}
1083
1084/**
1085 * fb_delete_videomode - removed videomode entry from modelist
1086 * @mode: videomode to remove
1087 * @head: struct list_head of modelist
1088 *
1089 * NOTES:
1090 * Will remove all matching mode entries
1091 */
1092void fb_delete_videomode(const struct fb_videomode *mode,
1093                         struct list_head *head)
1094{
1095        struct list_head *pos, *n;
1096        struct fb_modelist *modelist;
1097        struct fb_videomode *m;
1098
1099        list_for_each_safe(pos, n, head) {
1100                modelist = list_entry(pos, struct fb_modelist, list);
1101                m = &modelist->mode;
1102                if (fb_mode_is_equal(m, mode)) {
1103                        list_del(pos);
1104                        kfree(pos);
1105                }
1106        }
1107}
1108
1109/**
1110 * fb_destroy_modelist - destroy modelist
1111 * @head: struct list_head of modelist
1112 */
1113void fb_destroy_modelist(struct list_head *head)
1114{
1115        struct list_head *pos, *n;
1116
1117        list_for_each_safe(pos, n, head) {
1118                list_del(pos);
1119                kfree(pos);
1120        }
1121}
1122EXPORT_SYMBOL_GPL(fb_destroy_modelist);
1123
1124/**
1125 * fb_videomode_to_modelist - convert mode array to mode list
1126 * @modedb: array of struct fb_videomode
1127 * @num: number of entries in array
1128 * @head: struct list_head of modelist
1129 */
1130void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num,
1131                              struct list_head *head)
1132{
1133        int i;
1134
1135        INIT_LIST_HEAD(head);
1136
1137        for (i = 0; i < num; i++) {
1138                if (fb_add_videomode(&modedb[i], head))
1139                        return;
1140        }
1141}
1142
1143const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs,
1144                                                struct list_head *head)
1145{
1146        struct list_head *pos;
1147        struct fb_modelist *modelist;
1148        const struct fb_videomode *m, *m1 = NULL, *md = NULL, *best = NULL;
1149        int first = 0;
1150
1151        if (!head->prev || !head->next || list_empty(head))
1152                goto finished;
1153
1154        /* get the first detailed mode and the very first mode */
1155        list_for_each(pos, head) {
1156                modelist = list_entry(pos, struct fb_modelist, list);
1157                m = &modelist->mode;
1158
1159                if (!first) {
1160                        m1 = m;
1161                        first = 1;
1162                }
1163
1164                if (m->flag & FB_MODE_IS_FIRST) {
1165                        md = m;
1166                        break;
1167                }
1168        }
1169
1170        /* first detailed timing is preferred */
1171        if (specs->misc & FB_MISC_1ST_DETAIL) {
1172                best = md;
1173                goto finished;
1174        }
1175
1176        /* find best mode based on display width and height */
1177        if (specs->max_x && specs->max_y) {
1178                struct fb_var_screeninfo var;
1179
1180                memset(&var, 0, sizeof(struct fb_var_screeninfo));
1181                var.xres = (specs->max_x * 7200)/254;
1182                var.yres = (specs->max_y * 7200)/254;
1183                m = fb_find_best_mode(&var, head);
1184                if (m) {
1185                        best = m;
1186                        goto finished;
1187                }
1188        }
1189
1190        /* use first detailed mode */
1191        if (md) {
1192                best = md;
1193                goto finished;
1194        }
1195
1196        /* last resort, use the very first mode */
1197        best = m1;
1198finished:
1199        return best;
1200}
1201EXPORT_SYMBOL(fb_find_best_display);
1202
1203EXPORT_SYMBOL(fb_videomode_to_var);
1204EXPORT_SYMBOL(fb_var_to_videomode);
1205EXPORT_SYMBOL(fb_mode_is_equal);
1206EXPORT_SYMBOL(fb_add_videomode);
1207EXPORT_SYMBOL(fb_match_mode);
1208EXPORT_SYMBOL(fb_find_best_mode);
1209EXPORT_SYMBOL(fb_find_nearest_mode);
1210EXPORT_SYMBOL(fb_videomode_to_modelist);
1211EXPORT_SYMBOL(fb_find_mode);
1212EXPORT_SYMBOL(fb_find_mode_cvt);
1213