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 cea_modes[65] = {
 293        /* #1: 640x480p@59.94/60Hz */
 294        [1] = {
 295                NULL, 60, 640, 480, 39722, 48, 16, 33, 10, 96, 2, 0,
 296                FB_VMODE_NONINTERLACED, 0,
 297        },
 298        /* #3: 720x480p@59.94/60Hz */
 299        [3] = {
 300                NULL, 60, 720, 480, 37037, 60, 16, 30, 9, 62, 6, 0,
 301                FB_VMODE_NONINTERLACED, 0,
 302        },
 303        /* #5: 1920x1080i@59.94/60Hz */
 304        [5] = {
 305                NULL, 60, 1920, 1080, 13763, 148, 88, 15, 2, 44, 5,
 306                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 307                FB_VMODE_INTERLACED, 0,
 308        },
 309        /* #7: 720(1440)x480iH@59.94/60Hz */
 310        [7] = {
 311                NULL, 60, 1440, 480, 18554/*37108*/, 114, 38, 15, 4, 124, 3, 0,
 312                FB_VMODE_INTERLACED, 0,
 313        },
 314        /* #9: 720(1440)x240pH@59.94/60Hz */
 315        [9] = {
 316                NULL, 60, 1440, 240, 18554, 114, 38, 16, 4, 124, 3, 0,
 317                FB_VMODE_NONINTERLACED, 0,
 318        },
 319        /* #18: 720x576pH@50Hz */
 320        [18] = {
 321                NULL, 50, 720, 576, 37037, 68, 12, 39, 5, 64, 5, 0,
 322                FB_VMODE_NONINTERLACED, 0,
 323        },
 324        /* #19: 1280x720p@50Hz */
 325        [19] = {
 326                NULL, 50, 1280, 720, 13468, 220, 440, 20, 5, 40, 5,
 327                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 328                FB_VMODE_NONINTERLACED, 0,
 329        },
 330        /* #20: 1920x1080i@50Hz */
 331        [20] = {
 332                NULL, 50, 1920, 1080, 13480, 148, 528, 15, 5, 528, 5,
 333                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 334                FB_VMODE_INTERLACED, 0,
 335        },
 336        /* #32: 1920x1080p@23.98/24Hz */
 337        [32] = {
 338                NULL, 24, 1920, 1080, 13468, 148, 638, 36, 4, 44, 5,
 339                FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 340                FB_VMODE_NONINTERLACED, 0,
 341        },
 342        /* #35: (2880)x480p4x@59.94/60Hz */
 343        [35] = {
 344                NULL, 60, 2880, 480, 9250, 240, 64, 30, 9, 248, 6, 0,
 345                FB_VMODE_NONINTERLACED, 0,
 346        },
 347};
 348
 349const struct fb_videomode vesa_modes[] = {
 350        /* 0 640x350-85 VESA */
 351        { NULL, 85, 640, 350, 31746,  96, 32, 60, 32, 64, 3,
 352          FB_SYNC_HOR_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA},
 353        /* 1 640x400-85 VESA */
 354        { NULL, 85, 640, 400, 31746,  96, 32, 41, 01, 64, 3,
 355          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 356        /* 2 720x400-85 VESA */
 357        { NULL, 85, 721, 400, 28169, 108, 36, 42, 01, 72, 3,
 358          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 359        /* 3 640x480-60 VESA */
 360        { NULL, 60, 640, 480, 39682,  48, 16, 33, 10, 96, 2,
 361          0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 362        /* 4 640x480-72 VESA */
 363        { NULL, 72, 640, 480, 31746, 128, 24, 29, 9, 40, 2,
 364          0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 365        /* 5 640x480-75 VESA */
 366        { NULL, 75, 640, 480, 31746, 120, 16, 16, 01, 64, 3,
 367          0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 368        /* 6 640x480-85 VESA */
 369        { NULL, 85, 640, 480, 27777, 80, 56, 25, 01, 56, 3,
 370          0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 371        /* 7 800x600-56 VESA */
 372        { NULL, 56, 800, 600, 27777, 128, 24, 22, 01, 72, 2,
 373          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 374          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 375        /* 8 800x600-60 VESA */
 376        { NULL, 60, 800, 600, 25000, 88, 40, 23, 01, 128, 4,
 377          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 378          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 379        /* 9 800x600-72 VESA */
 380        { NULL, 72, 800, 600, 20000, 64, 56, 23, 37, 120, 6,
 381          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 382          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 383        /* 10 800x600-75 VESA */
 384        { NULL, 75, 800, 600, 20202, 160, 16, 21, 01, 80, 3,
 385          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 386          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 387        /* 11 800x600-85 VESA */
 388        { NULL, 85, 800, 600, 17761, 152, 32, 27, 01, 64, 3,
 389          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 390          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 391        /* 12 1024x768i-43 VESA */
 392        { NULL, 43, 1024, 768, 22271, 56, 8, 41, 0, 176, 8,
 393          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 394          FB_VMODE_INTERLACED, FB_MODE_IS_VESA },
 395        /* 13 1024x768-60 VESA */
 396        { NULL, 60, 1024, 768, 15384, 160, 24, 29, 3, 136, 6,
 397          0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 398        /* 14 1024x768-70 VESA */
 399        { NULL, 70, 1024, 768, 13333, 144, 24, 29, 3, 136, 6,
 400          0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 401        /* 15 1024x768-75 VESA */
 402        { NULL, 75, 1024, 768, 12690, 176, 16, 28, 1, 96, 3,
 403          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 404          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 405        /* 16 1024x768-85 VESA */
 406        { NULL, 85, 1024, 768, 10582, 208, 48, 36, 1, 96, 3,
 407          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 408          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 409        /* 17 1152x864-75 VESA */
 410        { NULL, 75, 1152, 864, 9259, 256, 64, 32, 1, 128, 3,
 411          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 412          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 413        /* 18 1280x960-60 VESA */
 414        { NULL, 60, 1280, 960, 9259, 312, 96, 36, 1, 112, 3,
 415          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 416          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 417        /* 19 1280x960-85 VESA */
 418        { NULL, 85, 1280, 960, 6734, 224, 64, 47, 1, 160, 3,
 419          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 420          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 421        /* 20 1280x1024-60 VESA */
 422        { NULL, 60, 1280, 1024, 9259, 248, 48, 38, 1, 112, 3,
 423          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 424          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 425        /* 21 1280x1024-75 VESA */
 426        { NULL, 75, 1280, 1024, 7407, 248, 16, 38, 1, 144, 3,
 427          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 428          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 429        /* 22 1280x1024-85 VESA */
 430        { NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3,
 431          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 432          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 433        /* 23 1600x1200-60 VESA */
 434        { NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
 435          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 436          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 437        /* 24 1600x1200-65 VESA */
 438        { NULL, 65, 1600, 1200, 5698, 304,  64, 46, 1, 192, 3,
 439          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 440          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 441        /* 25 1600x1200-70 VESA */
 442        { NULL, 70, 1600, 1200, 5291, 304, 64, 46, 1, 192, 3,
 443          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 444          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 445        /* 26 1600x1200-75 VESA */
 446        { NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3,
 447          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 448          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 449        /* 27 1600x1200-85 VESA */
 450        { NULL, 85, 1600, 1200, 4357, 304, 64, 46, 1, 192, 3,
 451          FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 452          FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 453        /* 28 1792x1344-60 VESA */
 454        { NULL, 60, 1792, 1344, 4882, 328, 128, 46, 1, 200, 3,
 455          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 456        /* 29 1792x1344-75 VESA */
 457        { NULL, 75, 1792, 1344, 3831, 352, 96, 69, 1, 216, 3,
 458          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 459        /* 30 1856x1392-60 VESA */
 460        { NULL, 60, 1856, 1392, 4580, 352, 96, 43, 1, 224, 3,
 461          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 462        /* 31 1856x1392-75 VESA */
 463        { NULL, 75, 1856, 1392, 3472, 352, 128, 104, 1, 224, 3,
 464          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 465        /* 32 1920x1440-60 VESA */
 466        { NULL, 60, 1920, 1440, 4273, 344, 128, 56, 1, 200, 3,
 467          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 468        /* 33 1920x1440-75 VESA */
 469        { NULL, 75, 1920, 1440, 3367, 352, 144, 56, 1, 224, 3,
 470          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 471        /* 34 1920x1200-60 RB VESA */
 472        { NULL, 60, 1920, 1200, 6493, 80, 48, 26, 3, 32, 6,
 473          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 474        /* 35 1920x1200-60 VESA */
 475        { NULL, 60, 1920, 1200, 5174, 336, 136, 36, 3, 200, 6,
 476          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 477        /* 36 1920x1200-75 VESA */
 478        { NULL, 75, 1920, 1200, 4077, 344, 136, 46, 3, 208, 6,
 479          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 480        /* 37 1920x1200-85 VESA */
 481        { NULL, 85, 1920, 1200, 3555, 352, 144, 53, 3, 208, 6,
 482          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 483        /* 38 2560x1600-60 RB VESA */
 484        { NULL, 60, 2560, 1600, 3724, 80, 48, 37, 3, 32, 6,
 485          FB_SYNC_HOR_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 486        /* 39 2560x1600-60 VESA */
 487        { NULL, 60, 2560, 1600, 2869, 472, 192, 49, 3, 280, 6,
 488          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 489        /* 40 2560x1600-75 VESA */
 490        { NULL, 75, 2560, 1600, 2256, 488, 208, 63, 3, 280, 6,
 491          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 492        /* 41 2560x1600-85 VESA */
 493        { NULL, 85, 2560, 1600, 1979, 488, 208, 73, 3, 280, 6,
 494          FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 495        /* 42 2560x1600-120 RB VESA */
 496        { NULL, 120, 2560, 1600, 1809, 80, 48, 85, 3, 32, 6,
 497          FB_SYNC_HOR_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 498};
 499EXPORT_SYMBOL(vesa_modes);
 500
 501const struct dmt_videomode dmt_modes[DMT_SIZE] = {
 502        { 0x01, 0x0000, 0x000000, &vesa_modes[0] },
 503        { 0x02, 0x3119, 0x000000, &vesa_modes[1] },
 504        { 0x03, 0x0000, 0x000000, &vesa_modes[2] },
 505        { 0x04, 0x3140, 0x000000, &vesa_modes[3] },
 506        { 0x05, 0x314c, 0x000000, &vesa_modes[4] },
 507        { 0x06, 0x314f, 0x000000, &vesa_modes[5] },
 508        { 0x07, 0x3159, 0x000000, &vesa_modes[6] },
 509        { 0x08, 0x0000, 0x000000, &vesa_modes[7] },
 510        { 0x09, 0x4540, 0x000000, &vesa_modes[8] },
 511        { 0x0a, 0x454c, 0x000000, &vesa_modes[9] },
 512        { 0x0b, 0x454f, 0x000000, &vesa_modes[10] },
 513        { 0x0c, 0x4559, 0x000000, &vesa_modes[11] },
 514        { 0x0d, 0x0000, 0x000000, NULL },
 515        { 0x0e, 0x0000, 0x000000, NULL },
 516        { 0x0f, 0x0000, 0x000000, &vesa_modes[12] },
 517        { 0x10, 0x6140, 0x000000, &vesa_modes[13] },
 518        { 0x11, 0x614a, 0x000000, &vesa_modes[14] },
 519        { 0x12, 0x614f, 0x000000, &vesa_modes[15] },
 520        { 0x13, 0x6159, 0x000000, &vesa_modes[16] },
 521        { 0x14, 0x0000, 0x000000, NULL },
 522        { 0x15, 0x714f, 0x000000, &vesa_modes[17] },
 523        { 0x16, 0x0000, 0x7f1c21, NULL },
 524        { 0x17, 0x0000, 0x7f1c28, NULL },
 525        { 0x18, 0x0000, 0x7f1c44, NULL },
 526        { 0x19, 0x0000, 0x7f1c62, NULL },
 527        { 0x1a, 0x0000, 0x000000, NULL },
 528        { 0x1b, 0x0000, 0x8f1821, NULL },
 529        { 0x1c, 0x8100, 0x8f1828, NULL },
 530        { 0x1d, 0x810f, 0x8f1844, NULL },
 531        { 0x1e, 0x8119, 0x8f1862, NULL },
 532        { 0x1f, 0x0000, 0x000000, NULL },
 533        { 0x20, 0x8140, 0x000000, &vesa_modes[18] },
 534        { 0x21, 0x8159, 0x000000, &vesa_modes[19] },
 535        { 0x22, 0x0000, 0x000000, NULL },
 536        { 0x23, 0x8180, 0x000000, &vesa_modes[20] },
 537        { 0x24, 0x818f, 0x000000, &vesa_modes[21] },
 538        { 0x25, 0x8199, 0x000000, &vesa_modes[22] },
 539        { 0x26, 0x0000, 0x000000, NULL },
 540        { 0x27, 0x0000, 0x000000, NULL },
 541        { 0x28, 0x0000, 0x000000, NULL },
 542        { 0x29, 0x0000, 0x0c2021, NULL },
 543        { 0x2a, 0x9040, 0x0c2028, NULL },
 544        { 0x2b, 0x904f, 0x0c2044, NULL },
 545        { 0x2c, 0x9059, 0x0c2062, NULL },
 546        { 0x2d, 0x0000, 0x000000, NULL },
 547        { 0x2e, 0x9500, 0xc11821, NULL },
 548        { 0x2f, 0x9500, 0xc11828, NULL },
 549        { 0x30, 0x950f, 0xc11844, NULL },
 550        { 0x31, 0x9519, 0xc11868, NULL },
 551        { 0x32, 0x0000, 0x000000, NULL },
 552        { 0x33, 0xa940, 0x000000, &vesa_modes[23] },
 553        { 0x34, 0xa945, 0x000000, &vesa_modes[24] },
 554        { 0x35, 0xa94a, 0x000000, &vesa_modes[25] },
 555        { 0x36, 0xa94f, 0x000000, &vesa_modes[26] },
 556        { 0x37, 0xa959, 0x000000, &vesa_modes[27] },
 557        { 0x38, 0x0000, 0x000000, NULL },
 558        { 0x39, 0x0000, 0x0c2821, NULL },
 559        { 0x3a, 0xb300, 0x0c2828, NULL },
 560        { 0x3b, 0xb30f, 0x0c2844, NULL },
 561        { 0x3c, 0xb319, 0x0c2868, NULL },
 562        { 0x3d, 0x0000, 0x000000, NULL },
 563        { 0x3e, 0xc140, 0x000000, &vesa_modes[28] },
 564        { 0x3f, 0xc14f, 0x000000, &vesa_modes[29] },
 565        { 0x40, 0x0000, 0x000000, NULL},
 566        { 0x41, 0xc940, 0x000000, &vesa_modes[30] },
 567        { 0x42, 0xc94f, 0x000000, &vesa_modes[31] },
 568        { 0x43, 0x0000, 0x000000, NULL },
 569        { 0x44, 0x0000, 0x572821, &vesa_modes[34] },
 570        { 0x45, 0xd100, 0x572828, &vesa_modes[35] },
 571        { 0x46, 0xd10f, 0x572844, &vesa_modes[36] },
 572        { 0x47, 0xd119, 0x572862, &vesa_modes[37] },
 573        { 0x48, 0x0000, 0x000000, NULL },
 574        { 0x49, 0xd140, 0x000000, &vesa_modes[32] },
 575        { 0x4a, 0xd14f, 0x000000, &vesa_modes[33] },
 576        { 0x4b, 0x0000, 0x000000, NULL },
 577        { 0x4c, 0x0000, 0x1f3821, &vesa_modes[38] },
 578        { 0x4d, 0x0000, 0x1f3828, &vesa_modes[39] },
 579        { 0x4e, 0x0000, 0x1f3844, &vesa_modes[40] },
 580        { 0x4f, 0x0000, 0x1f3862, &vesa_modes[41] },
 581        { 0x50, 0x0000, 0x000000, &vesa_modes[42] },
 582};
 583EXPORT_SYMBOL(dmt_modes);
 584#endif /* CONFIG_FB_MODE_HELPERS */
 585
 586/**
 587 *      fb_try_mode - test a video mode
 588 *      @var: frame buffer user defined part of display
 589 *      @info: frame buffer info structure
 590 *      @mode: frame buffer video mode structure
 591 *      @bpp: color depth in bits per pixel
 592 *
 593 *      Tries a video mode to test it's validity for device @info.
 594 *
 595 *      Returns 1 on success.
 596 *
 597 */
 598
 599static int fb_try_mode(struct fb_var_screeninfo *var, struct fb_info *info,
 600                       const struct fb_videomode *mode, unsigned int bpp)
 601{
 602        int err = 0;
 603
 604        DPRINTK("Trying mode %s %dx%d-%d@%d\n",
 605                mode->name ? mode->name : "noname",
 606                mode->xres, mode->yres, bpp, mode->refresh);
 607        var->xres = mode->xres;
 608        var->yres = mode->yres;
 609        var->xres_virtual = mode->xres;
 610        var->yres_virtual = mode->yres;
 611        var->xoffset = 0;
 612        var->yoffset = 0;
 613        var->bits_per_pixel = bpp;
 614        var->activate |= FB_ACTIVATE_TEST;
 615        var->pixclock = mode->pixclock;
 616        var->left_margin = mode->left_margin;
 617        var->right_margin = mode->right_margin;
 618        var->upper_margin = mode->upper_margin;
 619        var->lower_margin = mode->lower_margin;
 620        var->hsync_len = mode->hsync_len;
 621        var->vsync_len = mode->vsync_len;
 622        var->sync = mode->sync;
 623        var->vmode = mode->vmode;
 624        if (info->fbops->fb_check_var)
 625                err = info->fbops->fb_check_var(var, info);
 626        var->activate &= ~FB_ACTIVATE_TEST;
 627        return err;
 628}
 629
 630/**
 631 * fb_find_mode - finds a valid video mode
 632 * @var: frame buffer user defined part of display
 633 * @info: frame buffer info structure
 634 * @mode_option: string video mode to find
 635 * @db: video mode database
 636 * @dbsize: size of @db
 637 * @default_mode: default video mode to fall back to
 638 * @default_bpp: default color depth in bits per pixel
 639 *
 640 * Finds a suitable video mode, starting with the specified mode
 641 * in @mode_option with fallback to @default_mode.  If
 642 * @default_mode fails, all modes in the video mode database will
 643 * be tried.
 644 *
 645 * Valid mode specifiers for @mode_option::
 646 *
 647 *     <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][p][m]
 648 *
 649 * or ::
 650 *
 651 *     <name>[-<bpp>][@<refresh>]
 652 *
 653 * with <xres>, <yres>, <bpp> and <refresh> decimal numbers and
 654 * <name> a string.
 655 *
 656 * If 'M' is present after yres (and before refresh/bpp if present),
 657 * the function will compute the timings using VESA(tm) Coordinated
 658 * Video Timings (CVT).  If 'R' is present after 'M', will compute with
 659 * reduced blanking (for flatpanels).  If 'i' or 'p' are present, compute
 660 * interlaced or progressive mode.  If 'm' is present, add margins equal
 661 * to 1.8% of xres rounded down to 8 pixels, and 1.8% of yres. The char
 662 * 'i', 'p' and 'm' must be after 'M' and 'R'. Example::
 663 *
 664 *     1024x768MR-8@60m - Reduced blank with margins at 60Hz.
 665 *
 666 * NOTE: The passed struct @var is _not_ cleared!  This allows you
 667 * to supply values for e.g. the grayscale and accel_flags fields.
 668 *
 669 * Returns zero for failure, 1 if using specified @mode_option,
 670 * 2 if using specified @mode_option with an ignored refresh rate,
 671 * 3 if default mode is used, 4 if fall back to any valid mode.
 672 */
 673
 674int fb_find_mode(struct fb_var_screeninfo *var,
 675                 struct fb_info *info, const char *mode_option,
 676                 const struct fb_videomode *db, unsigned int dbsize,
 677                 const struct fb_videomode *default_mode,
 678                 unsigned int default_bpp)
 679{
 680        int i;
 681
 682        /* Set up defaults */
 683        if (!db) {
 684                db = modedb;
 685                dbsize = ARRAY_SIZE(modedb);
 686        }
 687
 688        if (!default_mode)
 689                default_mode = &db[0];
 690
 691        if (!default_bpp)
 692                default_bpp = 8;
 693
 694        /* Did the user specify a video mode? */
 695        if (!mode_option)
 696                mode_option = fb_mode_option;
 697        if (mode_option) {
 698                const char *name = mode_option;
 699                unsigned int namelen = strlen(name);
 700                int res_specified = 0, bpp_specified = 0, refresh_specified = 0;
 701                unsigned int xres = 0, yres = 0, bpp = default_bpp, refresh = 0;
 702                int yres_specified = 0, cvt = 0, rb = 0;
 703                int interlace_specified = 0, interlace = 0;
 704                int margins = 0;
 705                u32 best, diff, tdiff;
 706
 707                for (i = namelen-1; i >= 0; i--) {
 708                        switch (name[i]) {
 709                        case '@':
 710                                namelen = i;
 711                                if (!refresh_specified && !bpp_specified &&
 712                                    !yres_specified) {
 713                                        refresh = simple_strtol(&name[i+1], NULL,
 714                                                                10);
 715                                        refresh_specified = 1;
 716                                        if (cvt || rb)
 717                                                cvt = 0;
 718                                } else
 719                                        goto done;
 720                                break;
 721                        case '-':
 722                                namelen = i;
 723                                if (!bpp_specified && !yres_specified) {
 724                                        bpp = simple_strtol(&name[i+1], NULL,
 725                                                            10);
 726                                        bpp_specified = 1;
 727                                        if (cvt || rb)
 728                                                cvt = 0;
 729                                } else
 730                                        goto done;
 731                                break;
 732                        case 'x':
 733                                if (!yres_specified) {
 734                                        yres = simple_strtol(&name[i+1], NULL,
 735                                                             10);
 736                                        yres_specified = 1;
 737                                } else
 738                                        goto done;
 739                                break;
 740                        case '0' ... '9':
 741                                break;
 742                        case 'M':
 743                                if (!yres_specified)
 744                                        cvt = 1;
 745                                break;
 746                        case 'R':
 747                                if (!cvt)
 748                                        rb = 1;
 749                                break;
 750                        case 'm':
 751                                if (!cvt)
 752                                        margins = 1;
 753                                break;
 754                        case 'p':
 755                                if (!cvt) {
 756                                        interlace = 0;
 757                                        interlace_specified = 1;
 758                                }
 759                                break;
 760                        case 'i':
 761                                if (!cvt) {
 762                                        interlace = 1;
 763                                        interlace_specified = 1;
 764                                }
 765                                break;
 766                        default:
 767                                goto done;
 768                        }
 769                }
 770                if (i < 0 && yres_specified) {
 771                        xres = simple_strtol(name, NULL, 10);
 772                        res_specified = 1;
 773                }
 774done:
 775                if (cvt) {
 776                        struct fb_videomode cvt_mode;
 777                        int ret;
 778
 779                        DPRINTK("CVT mode %dx%d@%dHz%s%s%s\n", xres, yres,
 780                                (refresh) ? refresh : 60,
 781                                (rb) ? " reduced blanking" : "",
 782                                (margins) ? " with margins" : "",
 783                                (interlace) ? " interlaced" : "");
 784
 785                        memset(&cvt_mode, 0, sizeof(cvt_mode));
 786                        cvt_mode.xres = xres;
 787                        cvt_mode.yres = yres;
 788                        cvt_mode.refresh = (refresh) ? refresh : 60;
 789
 790                        if (interlace)
 791                                cvt_mode.vmode |= FB_VMODE_INTERLACED;
 792                        else
 793                                cvt_mode.vmode &= ~FB_VMODE_INTERLACED;
 794
 795                        ret = fb_find_mode_cvt(&cvt_mode, margins, rb);
 796
 797                        if (!ret && !fb_try_mode(var, info, &cvt_mode, bpp)) {
 798                                DPRINTK("modedb CVT: CVT mode ok\n");
 799                                return 1;
 800                        }
 801
 802                        DPRINTK("CVT mode invalid, getting mode from database\n");
 803                }
 804
 805                DPRINTK("Trying specified video mode%s %ix%i\n",
 806                        refresh_specified ? "" : " (ignoring refresh rate)",
 807                        xres, yres);
 808
 809                if (!refresh_specified) {
 810                        /*
 811                         * If the caller has provided a custom mode database and
 812                         * a valid monspecs structure, we look for the mode with
 813                         * the highest refresh rate.  Otherwise we play it safe
 814                         * it and try to find a mode with a refresh rate closest
 815                         * to the standard 60 Hz.
 816                         */
 817                        if (db != modedb &&
 818                            info->monspecs.vfmin && info->monspecs.vfmax &&
 819                            info->monspecs.hfmin && info->monspecs.hfmax &&
 820                            info->monspecs.dclkmax) {
 821                                refresh = 1000;
 822                        } else {
 823                                refresh = 60;
 824                        }
 825                }
 826
 827                diff = -1;
 828                best = -1;
 829                for (i = 0; i < dbsize; i++) {
 830                        if ((name_matches(db[i], name, namelen) ||
 831                             (res_specified && res_matches(db[i], xres, yres))) &&
 832                            !fb_try_mode(var, info, &db[i], bpp)) {
 833                                const int db_interlace = (db[i].vmode &
 834                                        FB_VMODE_INTERLACED ? 1 : 0);
 835                                int score = abs(db[i].refresh - refresh);
 836
 837                                if (interlace_specified)
 838                                        score += abs(db_interlace - interlace);
 839
 840                                if (!interlace_specified ||
 841                                    db_interlace == interlace)
 842                                        if (refresh_specified &&
 843                                            db[i].refresh == refresh)
 844                                                return 1;
 845
 846                                if (score < diff) {
 847                                        diff = score;
 848                                        best = i;
 849                                }
 850                        }
 851                }
 852                if (best != -1) {
 853                        fb_try_mode(var, info, &db[best], bpp);
 854                        return (refresh_specified) ? 2 : 1;
 855                }
 856
 857                diff = 2 * (xres + yres);
 858                best = -1;
 859                DPRINTK("Trying best-fit modes\n");
 860                for (i = 0; i < dbsize; i++) {
 861                        DPRINTK("Trying %ix%i\n", db[i].xres, db[i].yres);
 862                        if (!fb_try_mode(var, info, &db[i], bpp)) {
 863                                tdiff = abs(db[i].xres - xres) +
 864                                        abs(db[i].yres - yres);
 865
 866                                /*
 867                                 * Penalize modes with resolutions smaller
 868                                 * than requested.
 869                                 */
 870                                if (xres > db[i].xres || yres > db[i].yres)
 871                                        tdiff += xres + yres;
 872
 873                                if (diff > tdiff) {
 874                                        diff = tdiff;
 875                                        best = i;
 876                                }
 877                        }
 878                }
 879                if (best != -1) {
 880                        fb_try_mode(var, info, &db[best], bpp);
 881                        return 5;
 882                }
 883        }
 884
 885        DPRINTK("Trying default video mode\n");
 886        if (!fb_try_mode(var, info, default_mode, default_bpp))
 887                return 3;
 888
 889        DPRINTK("Trying all modes\n");
 890        for (i = 0; i < dbsize; i++)
 891                if (!fb_try_mode(var, info, &db[i], default_bpp))
 892                        return 4;
 893
 894        DPRINTK("No valid mode found\n");
 895        return 0;
 896}
 897
 898/**
 899 * fb_var_to_videomode - convert fb_var_screeninfo to fb_videomode
 900 * @mode: pointer to struct fb_videomode
 901 * @var: pointer to struct fb_var_screeninfo
 902 */
 903void fb_var_to_videomode(struct fb_videomode *mode,
 904                         const struct fb_var_screeninfo *var)
 905{
 906        u32 pixclock, hfreq, htotal, vtotal;
 907
 908        mode->name = NULL;
 909        mode->xres = var->xres;
 910        mode->yres = var->yres;
 911        mode->pixclock = var->pixclock;
 912        mode->hsync_len = var->hsync_len;
 913        mode->vsync_len = var->vsync_len;
 914        mode->left_margin = var->left_margin;
 915        mode->right_margin = var->right_margin;
 916        mode->upper_margin = var->upper_margin;
 917        mode->lower_margin = var->lower_margin;
 918        mode->sync = var->sync;
 919        mode->vmode = var->vmode & FB_VMODE_MASK;
 920        mode->flag = FB_MODE_IS_FROM_VAR;
 921        mode->refresh = 0;
 922
 923        if (!var->pixclock)
 924                return;
 925
 926        pixclock = PICOS2KHZ(var->pixclock) * 1000;
 927
 928        htotal = var->xres + var->right_margin + var->hsync_len +
 929                var->left_margin;
 930        vtotal = var->yres + var->lower_margin + var->vsync_len +
 931                var->upper_margin;
 932
 933        if (var->vmode & FB_VMODE_INTERLACED)
 934                vtotal /= 2;
 935        if (var->vmode & FB_VMODE_DOUBLE)
 936                vtotal *= 2;
 937
 938        if (!htotal || !vtotal)
 939                return;
 940
 941        hfreq = pixclock/htotal;
 942        mode->refresh = hfreq/vtotal;
 943}
 944
 945/**
 946 * fb_videomode_to_var - convert fb_videomode to fb_var_screeninfo
 947 * @var: pointer to struct fb_var_screeninfo
 948 * @mode: pointer to struct fb_videomode
 949 */
 950void fb_videomode_to_var(struct fb_var_screeninfo *var,
 951                         const struct fb_videomode *mode)
 952{
 953        var->xres = mode->xres;
 954        var->yres = mode->yres;
 955        var->xres_virtual = mode->xres;
 956        var->yres_virtual = mode->yres;
 957        var->xoffset = 0;
 958        var->yoffset = 0;
 959        var->pixclock = mode->pixclock;
 960        var->left_margin = mode->left_margin;
 961        var->right_margin = mode->right_margin;
 962        var->upper_margin = mode->upper_margin;
 963        var->lower_margin = mode->lower_margin;
 964        var->hsync_len = mode->hsync_len;
 965        var->vsync_len = mode->vsync_len;
 966        var->sync = mode->sync;
 967        var->vmode = mode->vmode & FB_VMODE_MASK;
 968}
 969
 970/**
 971 * fb_mode_is_equal - compare 2 videomodes
 972 * @mode1: first videomode
 973 * @mode2: second videomode
 974 *
 975 * RETURNS:
 976 * 1 if equal, 0 if not
 977 */
 978int fb_mode_is_equal(const struct fb_videomode *mode1,
 979                     const struct fb_videomode *mode2)
 980{
 981        return (mode1->xres         == mode2->xres &&
 982                mode1->yres         == mode2->yres &&
 983                mode1->pixclock     == mode2->pixclock &&
 984                mode1->hsync_len    == mode2->hsync_len &&
 985                mode1->vsync_len    == mode2->vsync_len &&
 986                mode1->left_margin  == mode2->left_margin &&
 987                mode1->right_margin == mode2->right_margin &&
 988                mode1->upper_margin == mode2->upper_margin &&
 989                mode1->lower_margin == mode2->lower_margin &&
 990                mode1->sync         == mode2->sync &&
 991                mode1->vmode        == mode2->vmode);
 992}
 993
 994/**
 995 * fb_find_best_mode - find best matching videomode
 996 * @var: pointer to struct fb_var_screeninfo
 997 * @head: pointer to struct list_head of modelist
 998 *
 999 * RETURNS:
1000 * struct fb_videomode, NULL if none found

1001 *
1002 * IMPORTANT:
1003 * This function assumes that all modelist entries in
1004 * info->modelist are valid.
1005 *
1006 * NOTES:
1007 * Finds best matching videomode which has an equal or greater dimension than
1008 * var->xres and var->yres.  If more than 1 videomode is found, will return
1009 * the videomode with the highest refresh rate
1010 */
1011const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var,
1012                                             struct list_head *head)
1013{
1014        struct list_head *pos;
1015        struct fb_modelist *modelist;
1016        struct fb_videomode *mode, *best = NULL;
1017        u32 diff = -1;
1018
1019        list_for_each(pos, head) {
1020                u32 d;
1021
1022                modelist = list_entry(pos, struct fb_modelist, list);
1023                mode = &modelist->mode;
1024
1025                if (mode->xres >= var->xres && mode->yres >= var->yres) {
1026                        d = (mode->xres - var->xres) +
1027                                (mode->yres - var->yres);
1028                        if (diff > d) {
1029                                diff = d;
1030                                best = mode;
1031                        } else if (diff == d && best &&
1032                                   mode->refresh > best->refresh)
1033                                best = mode;
1034                }
1035        }
1036        return best;
1037}
1038
1039/**
1040 * fb_find_nearest_mode - find closest videomode
1041 *
1042 * @mode: pointer to struct fb_videomode
1043 * @head: pointer to modelist
1044 *
1045 * Finds best matching videomode, smaller or greater in dimension.
1046 * If more than 1 videomode is found, will return the videomode with
1047 * the closest refresh rate.
1048 */
1049const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode,
1050                                                struct list_head *head)
1051{
1052        struct list_head *pos;
1053        struct fb_modelist *modelist;
1054        struct fb_videomode *cmode, *best = NULL;
1055        u32 diff = -1, diff_refresh = -1;
1056
1057        list_for_each(pos, head) {
1058                u32 d;
1059
1060                modelist = list_entry(pos, struct fb_modelist, list);
1061                cmode = &modelist->mode;
1062
1063                d = abs(cmode->xres - mode->xres) +
1064                        abs(cmode->yres - mode->yres);
1065                if (diff > d) {
1066                        diff = d;
1067                        diff_refresh = abs(cmode->refresh - mode->refresh);
1068                        best = cmode;
1069                } else if (diff == d) {
1070                        d = abs(cmode->refresh - mode->refresh);
1071                        if (diff_refresh > d) {
1072                                diff_refresh = d;
1073                                best = cmode;
1074                        }
1075                }
1076        }
1077
1078        return best;
1079}
1080
1081/**
1082 * fb_match_mode - find a videomode which exactly matches the timings in var
1083 * @var: pointer to struct fb_var_screeninfo
1084 * @head: pointer to struct list_head of modelist
1085 *
1086 * RETURNS:
1087 * struct fb_videomode, NULL if none found
1088 */
1089const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var,
1090                                         struct list_head *head)
1091{
1092        struct list_head *pos;
1093        struct fb_modelist *modelist;
1094        struct fb_videomode *m, mode;
1095
1096        fb_var_to_videomode(&mode, var);
1097        list_for_each(pos, head) {
1098                modelist = list_entry(pos, struct fb_modelist, list);
1099                m = &modelist->mode;
1100                if (fb_mode_is_equal(m, &mode))
1101                        return m;
1102        }
1103        return NULL;
1104}
1105
1106/**
1107 * fb_add_videomode - adds videomode entry to modelist
1108 * @mode: videomode to add
1109 * @head: struct list_head of modelist
1110 *
1111 * NOTES:
1112 * Will only add unmatched mode entries
1113 */
1114int fb_add_videomode(const struct fb_videomode *mode, struct list_head *head)
1115{
1116        struct list_head *pos;
1117        struct fb_modelist *modelist;
1118        struct fb_videomode *m;
1119        int found = 0;
1120
1121        list_for_each(pos, head) {
1122                modelist = list_entry(pos, struct fb_modelist, list);
1123                m = &modelist->mode;
1124                if (fb_mode_is_equal(m, mode)) {
1125                        found = 1;
1126                        break;
1127                }
1128        }
1129        if (!found) {
1130                modelist = kmalloc(sizeof(struct fb_modelist),
1131                                                  GFP_KERNEL);
1132
1133                if (!modelist)
1134                        return -ENOMEM;
1135                modelist->mode = *mode;
1136                list_add(&modelist->list, head);
1137        }
1138        return 0;
1139}
1140
1141/**
1142 * fb_delete_videomode - removed videomode entry from modelist
1143 * @mode: videomode to remove
1144 * @head: struct list_head of modelist
1145 *
1146 * NOTES:
1147 * Will remove all matching mode entries
1148 */
1149void fb_delete_videomode(const struct fb_videomode *mode,
1150                         struct list_head *head)
1151{
1152        struct list_head *pos, *n;
1153        struct fb_modelist *modelist;
1154        struct fb_videomode *m;
1155
1156        list_for_each_safe(pos, n, head) {
1157                modelist = list_entry(pos, struct fb_modelist, list);
1158                m = &modelist->mode;
1159                if (fb_mode_is_equal(m, mode)) {
1160                        list_del(pos);
1161                        kfree(pos);
1162                }
1163        }
1164}
1165
1166/**
1167 * fb_destroy_modelist - destroy modelist
1168 * @head: struct list_head of modelist
1169 */
1170void fb_destroy_modelist(struct list_head *head)
1171{
1172        struct list_head *pos, *n;
1173
1174        list_for_each_safe(pos, n, head) {
1175                list_del(pos);
1176                kfree(pos);
1177        }
1178}
1179EXPORT_SYMBOL_GPL(fb_destroy_modelist);
1180
1181/**
1182 * fb_videomode_to_modelist - convert mode array to mode list
1183 * @modedb: array of struct fb_videomode
1184 * @num: number of entries in array
1185 * @head: struct list_head of modelist
1186 */
1187void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num,
1188                              struct list_head *head)
1189{
1190        int i;
1191
1192        INIT_LIST_HEAD(head);
1193
1194        for (i = 0; i < num; i++) {
1195                if (fb_add_videomode(&modedb[i], head))
1196                        return;
1197        }
1198}
1199
1200const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs,
1201                                                struct list_head *head)
1202{
1203        struct list_head *pos;
1204        struct fb_modelist *modelist;
1205        const struct fb_videomode *m, *m1 = NULL, *md = NULL, *best = NULL;
1206        int first = 0;
1207
1208        if (!head->prev || !head->next || list_empty(head))
1209                goto finished;
1210
1211        /* get the first detailed mode and the very first mode */
1212        list_for_each(pos, head) {
1213                modelist = list_entry(pos, struct fb_modelist, list);
1214                m = &modelist->mode;
1215
1216                if (!first) {
1217                        m1 = m;
1218                        first = 1;
1219                }
1220
1221                if (m->flag & FB_MODE_IS_FIRST) {
1222                        md = m;
1223                        break;
1224                }
1225        }
1226
1227        /* first detailed timing is preferred */
1228        if (specs->misc & FB_MISC_1ST_DETAIL) {
1229                best = md;
1230                goto finished;
1231        }
1232
1233        /* find best mode based on display width and height */
1234        if (specs->max_x && specs->max_y) {
1235                struct fb_var_screeninfo var;
1236
1237                memset(&var, 0, sizeof(struct fb_var_screeninfo));
1238                var.xres = (specs->max_x * 7200)/254;
1239                var.yres = (specs->max_y * 7200)/254;
1240                m = fb_find_best_mode(&var, head);
1241                if (m) {
1242                        best = m;
1243                        goto finished;
1244                }
1245        }
1246
1247        /* use first detailed mode */
1248        if (md) {
1249                best = md;
1250                goto finished;
1251        }
1252
1253        /* last resort, use the very first mode */
1254        best = m1;
1255finished:
1256        return best;
1257}
1258EXPORT_SYMBOL(fb_find_best_display);
1259
1260EXPORT_SYMBOL(fb_videomode_to_var);
1261EXPORT_SYMBOL(fb_var_to_videomode);
1262EXPORT_SYMBOL(fb_mode_is_equal);
1263EXPORT_SYMBOL(fb_add_videomode);
1264EXPORT_SYMBOL(fb_match_mode);
1265EXPORT_SYMBOL(fb_find_best_mode);
1266EXPORT_SYMBOL(fb_find_nearest_mode);
1267EXPORT_SYMBOL(fb_videomode_to_modelist);
1268EXPORT_SYMBOL(fb_find_mode);
1269EXPORT_SYMBOL(fb_find_mode_cvt);
1270