drivers/video/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/tty.h>
  16 #include <linux/fb.h>
  17 #include <linux/sched.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, __FUNCTION__ , ## args)
  28 #else
  29 #define DPRINTK(fmt, args...)
  30 #endif
  31
  32 const char *global_mode_option;
  33
  34     /*
  35      *  Standard video mode definitions (taken from XFree86)
  36      */
  37
  38 #define DEFAULT_MODEDB_INDEX    0
  39
  40 static const struct fb_videomode modedb[] = {
  41     {
  42         /* 640x400 @ 70 Hz, 31.5 kHz hsync */
  43         NULL, 70, 640, 400, 39721, 40, 24, 39, 9, 96, 2,
  44         0, FB_VMODE_NONINTERLACED
  45     }, {
  46         /* 640x480 @ 60 Hz, 31.5 kHz hsync */
  47         NULL, 60, 640, 480, 39721, 40, 24, 32, 11, 96, 2,
  48         0, FB_VMODE_NONINTERLACED
  49     }, {
  50         /* 800x600 @ 56 Hz, 35.15 kHz hsync */
  51         NULL, 56, 800, 600, 27777, 128, 24, 22, 1, 72, 2,
  52         0, FB_VMODE_NONINTERLACED
  53     }, {
  54         /* 1024x768 @ 87 Hz interlaced, 35.5 kHz hsync */
  55         NULL, 87, 1024, 768, 22271, 56, 24, 33, 8, 160, 8,
  56         0, FB_VMODE_INTERLACED
  57     }, {
  58         /* 640x400 @ 85 Hz, 37.86 kHz hsync */
  59         NULL, 85, 640, 400, 31746, 96, 32, 41, 1, 64, 3,
  60         FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
  61     }, {
  62         /* 640x480 @ 72 Hz, 36.5 kHz hsync */
  63         NULL, 72, 640, 480, 31746, 144, 40, 30, 8, 40, 3,
  64         0, FB_VMODE_NONINTERLACED
  65     }, {
  66         /* 640x480 @ 75 Hz, 37.50 kHz hsync */
  67         NULL, 75, 640, 480, 31746, 120, 16, 16, 1, 64, 3,
  68         0, FB_VMODE_NONINTERLACED
  69     }, {
  70         /* 800x600 @ 60 Hz, 37.8 kHz hsync */
  71         NULL, 60, 800, 600, 25000, 88, 40, 23, 1, 128, 4,
  72         FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
  73     }, {
  74         /* 640x480 @ 85 Hz, 43.27 kHz hsync */
  75         NULL, 85, 640, 480, 27777, 80, 56, 25, 1, 56, 3,
  76         0, FB_VMODE_NONINTERLACED
  77     }, {
  78         /* 1152x864 @ 89 Hz interlaced, 44 kHz hsync */
  79         NULL, 69, 1152, 864, 15384, 96, 16, 110, 1, 216, 10,
  80         0, FB_VMODE_INTERLACED
  81     }, {
  82         /* 800x600 @ 72 Hz, 48.0 kHz hsync */
  83         NULL, 72, 800, 600, 20000, 64, 56, 23, 37, 120, 6,
  84         FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
  85     }, {
  86         /* 1024x768 @ 60 Hz, 48.4 kHz hsync */
  87         NULL, 60, 1024, 768, 15384, 168, 8, 29, 3, 144, 6,
  88         0, FB_VMODE_NONINTERLACED
  89     }, {
  90         /* 640x480 @ 100 Hz, 53.01 kHz hsync */
  91         NULL, 100, 640, 480, 21834, 96, 32, 36, 8, 96, 6,
  92         0, FB_VMODE_NONINTERLACED
  93     }, {
  94         /* 1152x864 @ 60 Hz, 53.5 kHz hsync */
  95         NULL, 60, 1152, 864, 11123, 208, 64, 16, 4, 256, 8,
  96         0, FB_VMODE_NONINTERLACED
  97     }, {
  98         /* 800x600 @ 85 Hz, 55.84 kHz hsync */
  99         NULL, 85, 800, 600, 16460, 160, 64, 36, 16, 64, 5,
 100         0, FB_VMODE_NONINTERLACED
 101     }, {
 102         /* 1024x768 @ 70 Hz, 56.5 kHz hsync */
 103         NULL, 70, 1024, 768, 13333, 144, 24, 29, 3, 136, 6,
 104         0, FB_VMODE_NONINTERLACED
 105     }, {
 106         /* 1280x1024 @ 87 Hz interlaced, 51 kHz hsync */
 107         NULL, 87, 1280, 1024, 12500, 56, 16, 128, 1, 216, 12,
 108         0, FB_VMODE_INTERLACED
 109     }, {
 110         /* 800x600 @ 100 Hz, 64.02 kHz hsync */
 111         NULL, 100, 800, 600, 14357, 160, 64, 30, 4, 64, 6,
 112         0, FB_VMODE_NONINTERLACED
 113     }, {
 114         /* 1024x768 @ 76 Hz, 62.5 kHz hsync */
 115         NULL, 76, 1024, 768, 11764, 208, 8, 36, 16, 120, 3,
 116         0, FB_VMODE_NONINTERLACED
 117     }, {
 118         /* 1152x864 @ 70 Hz, 62.4 kHz hsync */
 119         NULL, 70, 1152, 864, 10869, 106, 56, 20, 1, 160, 10,
 120         0, FB_VMODE_NONINTERLACED
 121     }, {
 122         /* 1280x1024 @ 61 Hz, 64.2 kHz hsync */
 123         NULL, 61, 1280, 1024, 9090, 200, 48, 26, 1, 184, 3,
 124         0, FB_VMODE_NONINTERLACED
 125     }, {
 126         /* 1400x1050 @ 60Hz, 63.9 kHz hsync */
 127         NULL, 68, 1400, 1050, 9259, 136, 40, 13, 1, 112, 3,
 128         0, FB_VMODE_NONINTERLACED
 129     }, {
 130         /* 1400x1050 @ 75,107 Hz, 82,392 kHz +hsync +vsync*/
 131         NULL, 75, 1400, 1050, 9271, 120, 56, 13, 0, 112, 3,
 132         FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
 133     }, {
 134         /* 1400x1050 @ 60 Hz, ? kHz +hsync +vsync*/
 135         NULL, 60, 1400, 1050, 9259, 128, 40, 12, 0, 112, 3,
 136         FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
 137     }, {
 138         /* 1024x768 @ 85 Hz, 70.24 kHz hsync */
 139         NULL, 85, 1024, 768, 10111, 192, 32, 34, 14, 160, 6,
 140         0, FB_VMODE_NONINTERLACED
 141     }, {
 142         /* 1152x864 @ 78 Hz, 70.8 kHz hsync */
 143         NULL, 78, 1152, 864, 9090, 228, 88, 32, 0, 84, 12,
 144         0, FB_VMODE_NONINTERLACED
 145     }, {
 146         /* 1280x1024 @ 70 Hz, 74.59 kHz hsync */
 147         NULL, 70, 1280, 1024, 7905, 224, 32, 28, 8, 160, 8,
 148         0, FB_VMODE_NONINTERLACED
 149     }, {
 150         /* 1600x1200 @ 60Hz, 75.00 kHz hsync */
 151         NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
 152         FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
 153     }, {
 154         /* 1152x864 @ 84 Hz, 76.0 kHz hsync */
 155         NULL, 84, 1152, 864, 7407, 184, 312, 32, 0, 128, 12,
 156         0, FB_VMODE_NONINTERLACED
 157     }, {
 158         /* 1280x1024 @ 74 Hz, 78.85 kHz hsync */
 159         NULL, 74, 1280, 1024, 7407, 256, 32, 34, 3, 144, 3,
 160         0, FB_VMODE_NONINTERLACED
 161     }, {
 162         /* 1024x768 @ 100Hz, 80.21 kHz hsync */
 163         NULL, 100, 1024, 768, 8658, 192, 32, 21, 3, 192, 10,
 164         0, FB_VMODE_NONINTERLACED
 165     }, {
 166         /* 1280x1024 @ 76 Hz, 81.13 kHz hsync */
 167         NULL, 76, 1280, 1024, 7407, 248, 32, 34, 3, 104, 3,
 168         0, FB_VMODE_NONINTERLACED
 169     }, {
 170         /* 1600x1200 @ 70 Hz, 87.50 kHz hsync */
 171         NULL, 70, 1600, 1200, 5291, 304, 64, 46, 1, 192, 3,
 172         0, FB_VMODE_NONINTERLACED
 173     }, {
 174         /* 1152x864 @ 100 Hz, 89.62 kHz hsync */
 175         NULL, 100, 1152, 864, 7264, 224, 32, 17, 2, 128, 19,
 176         0, 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, FB_VMODE_NONINTERLACED
 181     }, {
 182         /* 1600x1200 @ 75 Hz, 93.75 kHz hsync */
 183         NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3,
 184         FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
 185     }, {
 186         /* 1600x1200 @ 85 Hz, 105.77 kHz hsync */
 187         NULL, 85, 1600, 1200, 4545, 272, 16, 37, 4, 192, 3,
 188         FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
 189     }, {
 190         /* 1280x1024 @ 100 Hz, 107.16 kHz hsync */
 191         NULL, 100, 1280, 1024, 5502, 256, 32, 26, 7, 128, 15,
 192         0, FB_VMODE_NONINTERLACED
 193     }, {
 194         /* 1800x1440 @ 64Hz, 96.15 kHz hsync  */
 195         NULL, 64, 1800, 1440, 4347, 304, 96, 46, 1, 192, 3,
 196         FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
 197     }, {
 198         /* 1800x1440 @ 70Hz, 104.52 kHz hsync  */
 199         NULL, 70, 1800, 1440, 4000, 304, 96, 46, 1, 192, 3,
 200         FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
 201     }, {
 202         /* 512x384 @ 78 Hz, 31.50 kHz hsync */
 203         NULL, 78, 512, 384, 49603, 48, 16, 16, 1, 64, 3,
 204         0, FB_VMODE_NONINTERLACED
 205     }, {
 206         /* 512x384 @ 85 Hz, 34.38 kHz hsync */
 207         NULL, 85, 512, 384, 45454, 48, 16, 16, 1, 64, 3,
 208         0, FB_VMODE_NONINTERLACED
 209     }, {
 210         /* 320x200 @ 70 Hz, 31.5 kHz hsync, 8:5 aspect ratio */
 211         NULL, 70, 320, 200, 79440, 16, 16, 20, 4, 48, 1,
 212         0, FB_VMODE_DOUBLE
 213     }, {
 214         /* 320x240 @ 60 Hz, 31.5 kHz hsync, 4:3 aspect ratio */
 215         NULL, 60, 320, 240, 79440, 16, 16, 16, 5, 48, 1,
 216         0, FB_VMODE_DOUBLE
 217     }, {
 218         /* 320x240 @ 72 Hz, 36.5 kHz hsync */
 219         NULL, 72, 320, 240, 63492, 16, 16, 16, 4, 48, 2,
 220         0, FB_VMODE_DOUBLE
 221     }, {
 222         /* 400x300 @ 56 Hz, 35.2 kHz hsync, 4:3 aspect ratio */
 223         NULL, 56, 400, 300, 55555, 64, 16, 10, 1, 32, 1,
 224         0, FB_VMODE_DOUBLE
 225     }, {
 226         /* 400x300 @ 60 Hz, 37.8 kHz hsync */
 227         NULL, 60, 400, 300, 50000, 48, 16, 11, 1, 64, 2,
 228         0, FB_VMODE_DOUBLE
 229     }, {
 230         /* 400x300 @ 72 Hz, 48.0 kHz hsync */
 231         NULL, 72, 400, 300, 40000, 32, 24, 11, 19, 64, 3,
 232         0, FB_VMODE_DOUBLE
 233     }, {
 234         /* 480x300 @ 56 Hz, 35.2 kHz hsync, 8:5 aspect ratio */
 235         NULL, 56, 480, 300, 46176, 80, 16, 10, 1, 40, 1,
 236         0, FB_VMODE_DOUBLE
 237     }, {
 238         /* 480x300 @ 60 Hz, 37.8 kHz hsync */
 239         NULL, 60, 480, 300, 41858, 56, 16, 11, 1, 80, 2,
 240         0, FB_VMODE_DOUBLE
 241     }, {
 242         /* 480x300 @ 63 Hz, 39.6 kHz hsync */
 243         NULL, 63, 480, 300, 40000, 56, 16, 11, 1, 80, 2,
 244         0, FB_VMODE_DOUBLE
 245     }, {
 246         /* 480x300 @ 72 Hz, 48.0 kHz hsync */
 247         NULL, 72, 480, 300, 33386, 40, 24, 11, 19, 80, 3,
 248         0, FB_VMODE_DOUBLE
 249     }, {
 250         /* 1920x1200 @ 60 Hz, 74.5 Khz hsync */
 251         NULL, 60, 1920, 1200, 5177, 128, 336, 1, 38, 208, 3,
 252         FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 253         FB_VMODE_NONINTERLACED
 254     },
 255 };
 256
 257 #ifdef CONFIG_FB_MODE_HELPERS
 258 const struct fb_videomode vesa_modes[] = {
 259         /* 0 640x350-85 VESA */
 260         { NULL, 85, 640, 350, 31746,  96, 32, 60, 32, 64, 3,
 261           FB_SYNC_HOR_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA},
 262         /* 1 640x400-85 VESA */
 263         { NULL, 85, 640, 400, 31746,  96, 32, 41, 01, 64, 3,
 264           FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 265         /* 2 720x400-85 VESA */
 266         { NULL, 85, 721, 400, 28169, 108, 36, 42, 01, 72, 3,
 267           FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 268         /* 3 640x480-60 VESA */
 269         { NULL, 60, 640, 480, 39682,  48, 16, 33, 10, 96, 2,
 270           0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 271         /* 4 640x480-72 VESA */
 272         { NULL, 72, 640, 480, 31746, 128, 24, 29, 9, 40, 2,
 273           0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 274         /* 5 640x480-75 VESA */
 275         { NULL, 75, 640, 480, 31746, 120, 16, 16, 01, 64, 3,
 276           0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 277         /* 6 640x480-85 VESA */
 278         { NULL, 85, 640, 480, 27777, 80, 56, 25, 01, 56, 3,
 279           0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 280         /* 7 800x600-56 VESA */
 281         { NULL, 56, 800, 600, 27777, 128, 24, 22, 01, 72, 2,
 282           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 283           FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 284         /* 8 800x600-60 VESA */
 285         { NULL, 60, 800, 600, 25000, 88, 40, 23, 01, 128, 4,
 286           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 287           FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 288         /* 9 800x600-72 VESA */
 289         { NULL, 72, 800, 600, 20000, 64, 56, 23, 37, 120, 6,
 290           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 291           FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 292         /* 10 800x600-75 VESA */
 293         { NULL, 75, 800, 600, 20202, 160, 16, 21, 01, 80, 3,
 294           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 295           FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 296         /* 11 800x600-85 VESA */
 297         { NULL, 85, 800, 600, 17761, 152, 32, 27, 01, 64, 3,
 298           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 299           FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 300         /* 12 1024x768i-43 VESA */
 301         { NULL, 53, 1024, 768, 22271, 56, 8, 41, 0, 176, 8,
 302           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 303           FB_VMODE_INTERLACED, FB_MODE_IS_VESA },
 304         /* 13 1024x768-60 VESA */
 305         { NULL, 60, 1024, 768, 15384, 160, 24, 29, 3, 136, 6,
 306           0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 307         /* 14 1024x768-70 VESA */
 308         { NULL, 70, 1024, 768, 13333, 144, 24, 29, 3, 136, 6,
 309           0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 310         /* 15 1024x768-75 VESA */
 311         { NULL, 75, 1024, 768, 12690, 176, 16, 28, 1, 96, 3,
 312           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 313           FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 314         /* 16 1024x768-85 VESA */
 315         { NULL, 85, 1024, 768, 10582, 208, 48, 36, 1, 96, 3,
 316           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 317           FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 318         /* 17 1152x864-75 VESA */
 319         { NULL, 75, 1153, 864, 9259, 256, 64, 32, 1, 128, 3,
 320           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 321           FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 322         /* 18 1280x960-60 VESA */
 323         { NULL, 60, 1280, 960, 9259, 312, 96, 36, 1, 112, 3,
 324           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 325           FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 326         /* 19 1280x960-85 VESA */
 327         { NULL, 85, 1280, 960, 6734, 224, 64, 47, 1, 160, 3,
 328           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 329           FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 330         /* 20 1280x1024-60 VESA */
 331         { NULL, 60, 1280, 1024, 9259, 248, 48, 38, 1, 112, 3,
 332           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 333           FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 334         /* 21 1280x1024-75 VESA */
 335         { NULL, 75, 1280, 1024, 7407, 248, 16, 38, 1, 144, 3,
 336           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 337           FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 338         /* 22 1280x1024-85 VESA */
 339         { NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3,
 340           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 341           FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 342         /* 23 1600x1200-60 VESA */
 343         { NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
 344           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 345           FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 346         /* 24 1600x1200-65 VESA */
 347         { NULL, 65, 1600, 1200, 5698, 304,  64, 46, 1, 192, 3,
 348           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 349           FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 350         /* 25 1600x1200-70 VESA */
 351         { NULL, 70, 1600, 1200, 5291, 304, 64, 46, 1, 192, 3,
 352           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 353           FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 354         /* 26 1600x1200-75 VESA */
 355         { NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3,
 356           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 357           FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 358         /* 27 1600x1200-85 VESA */
 359         { NULL, 85, 1600, 1200, 4357, 304, 64, 46, 1, 192, 3,
 360           FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 361           FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 362         /* 28 1792x1344-60 VESA */
 363         { NULL, 60, 1792, 1344, 4882, 328, 128, 46, 1, 200, 3,
 364           FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 365         /* 29 1792x1344-75 VESA */
 366         { NULL, 75, 1792, 1344, 3831, 352, 96, 69, 1, 216, 3,
 367           FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 368         /* 30 1856x1392-60 VESA */
 369         { NULL, 60, 1856, 1392, 4580, 352, 96, 43, 1, 224, 3,
 370           FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 371         /* 31 1856x1392-75 VESA */
 372         { NULL, 75, 1856, 1392, 3472, 352, 128, 104, 1, 224, 3,
 373           FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 374         /* 32 1920x1440-60 VESA */
 375         { NULL, 60, 1920, 1440, 4273, 344, 128, 56, 1, 200, 3,
 376           FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 377         /* 33 1920x1440-75 VESA */
 378         { NULL, 60, 1920, 1440, 3367, 352, 144, 56, 1, 224, 3,
 379           FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
 380 };
 381 EXPORT_SYMBOL(vesa_modes);
 382 #endif /* CONFIG_FB_MODE_HELPERS */
 383
 384 static int my_atoi(const char *name)
 385 {
 386     int val = 0;
 387
 388     for (;; name++) {
 389         switch (*name) {
 390             case '0'...'9':
 391                 val = 10*val+(*name-'0');
 392                 break;
 393             default:
 394                 return val;
 395         }
 396     }
 397 }
 398
 399 /**
 400  *      fb_try_mode - test a video mode
 401  *      @var: frame buffer user defined part of display
 402  *      @info: frame buffer info structure
 403  *      @mode: frame buffer video mode structure
 404  *      @bpp: color depth in bits per pixel
 405  *
 406  *      Tries a video mode to test it's validity for device @info.
 407  *
 408  *      Returns 1 on success.
 409  *
 410  */
 411
 412 static int fb_try_mode(struct fb_var_screeninfo *var, struct fb_info *info,
 413                        const struct fb_videomode *mode, unsigned int bpp)
 414 {
 415     int err = 0;
 416
 417     DPRINTK("Trying mode %s %dx%d-%d@%d\n", mode->name ? mode->name : "noname",
 418             mode->xres, mode->yres, bpp, mode->refresh);
 419     var->xres = mode->xres;
 420     var->yres = mode->yres;
 421     var->xres_virtual = mode->xres;
 422     var->yres_virtual = mode->yres;
 423     var->xoffset = 0;
 424     var->yoffset = 0;
 425     var->bits_per_pixel = bpp;
 426     var->activate |= FB_ACTIVATE_TEST;
 427     var->pixclock = mode->pixclock;
 428     var->left_margin = mode->left_margin;
 429     var->right_margin = mode->right_margin;
 430     var->upper_margin = mode->upper_margin;
 431     var->lower_margin = mode->lower_margin;
 432     var->hsync_len = mode->hsync_len;
 433     var->vsync_len = mode->vsync_len;
 434     var->sync = mode->sync;
 435     var->vmode = mode->vmode;
 436     if (info->fbops->fb_check_var)
 437         err = info->fbops->fb_check_var(var, info);
 438     var->activate &= ~FB_ACTIVATE_TEST;
 439     return err;
 440 }
 441
 442 /**
 443  *      fb_find_mode - finds a valid video mode
 444  *      @var: frame buffer user defined part of display
 445  *      @info: frame buffer info structure
 446  *      @mode_option: string video mode to find
 447  *      @db: video mode database
 448  *      @dbsize: size of @db
 449  *      @default_mode: default video mode to fall back to
 450  *      @default_bpp: default color depth in bits per pixel
 451  *
 452  *      Finds a suitable video mode, starting with the specified mode
 453  *      in @mode_option with fallback to @default_mode.  If
 454  *      @default_mode fails, all modes in the video mode database will
 455  *      be tried.
 456  *
 457  *      Valid mode specifiers for @mode_option:
 458  *
 459  *      <xres>x<yres>[-<bpp>][@<refresh>] or
 460  *      <name>[-<bpp>][@<refresh>]
 461  *
 462  *      with <xres>, <yres>, <bpp> and <refresh> decimal numbers and
 463  *      <name> a string.
 464  *
 465  *      NOTE: The passed struct @var is _not_ cleared!  This allows you
 466  *      to supply values for e.g. the grayscale and accel_flags fields.
 467  *
 468  *      Returns zero for failure, 1 if using specified @mode_option,
 469  *      2 if using specified @mode_option with an ignored refresh rate,
 470  *      3 if default mode is used, 4 if fall back to any valid mode.
 471  *
 472  */
 473
 474 int fb_find_mode(struct fb_var_screeninfo *var,
 475                  struct fb_info *info, const char *mode_option,
 476                  const struct fb_videomode *db, unsigned int dbsize,
 477                  const struct fb_videomode *default_mode,
 478                  unsigned int default_bpp)
 479 {
 480     int i;
 481
 482     /* Set up defaults */
 483     if (!db) {
 484         db = modedb;
 485         dbsize = sizeof(modedb)/sizeof(*modedb);
 486     }
 487     if (!default_mode)
 488         default_mode = &modedb[DEFAULT_MODEDB_INDEX];
 489     if (!default_bpp)
 490         default_bpp = 8;
 491
 492     /* Did the user specify a video mode? */
 493     if (mode_option || (mode_option = global_mode_option)) {
 494         const char *name = mode_option;
 495         unsigned int namelen = strlen(name);
 496         int res_specified = 0, bpp_specified = 0, refresh_specified = 0;
 497         unsigned int xres = 0, yres = 0, bpp = default_bpp, refresh = 0;
 498         int yres_specified = 0;
 499         u32 best, diff;
 500
 501         for (i = namelen-1; i >= 0; i--) {
 502             switch (name[i]) {
 503                 case '@':
 504                     namelen = i;
 505                     if (!refresh_specified && !bpp_specified &&
 506                         !yres_specified) {
 507                         refresh = my_atoi(&name[i+1]);
 508                         refresh_specified = 1;
 509                     } else
 510                         goto done;
 511                     break;
 512                 case '-':
 513                     namelen = i;
 514                     if (!bpp_specified && !yres_specified) {
 515                         bpp = my_atoi(&name[i+1]);
 516                         bpp_specified = 1;
 517                     } else
 518                         goto done;
 519                     break;
 520                 case 'x':
 521                     if (!yres_specified) {
 522                         yres = my_atoi(&name[i+1]);
 523                         yres_specified = 1;
 524                     } else
 525                         goto done;
 526                     break;
 527                 case '0'...'9':
 528                     break;
 529                 default:
 530                     goto done;
 531             }
 532         }
 533         if (i < 0 && yres_specified) {
 534             xres = my_atoi(name);
 535             res_specified = 1;
 536         }
 537 done:
 538         DPRINTK("Trying specified video mode%s %ix%i\n",
 539             refresh_specified ? "" : " (ignoring refresh rate)", xres, yres);
 540
 541         diff = refresh;
 542         best = -1;
 543         for (i = 0; i < dbsize; i++) {
 544                 if ((name_matches(db[i], name, namelen) &&
 545                         !fb_try_mode(var, info, &db[i], bpp)))
 546                         return 1;
 547                 if (res_specified && res_matches(db[i], xres, yres)) {
 548                         if(!fb_try_mode(var, info, &db[i], bpp)) {
 549                                 if(!refresh_specified || db[i].refresh == refresh)
 550                                         return 1;
 551                                 else {
 552                                         if(diff > abs(db[i].refresh - refresh)) {
 553                                                 diff = abs(db[i].refresh - refresh);
 554                                                 best = i;
 555                                         }
 556                                 }
 557                         }
 558                 }
 559         }
 560         if (best != -1) {
 561                 fb_try_mode(var, info, &db[best], bpp);
 562                 return 2;
 563         }
 564
 565         diff = xres + yres;
 566         best = -1;
 567         DPRINTK("Trying best-fit modes\n");
 568         for (i = 0; i < dbsize; i++) {
 569             if (xres <= db[i].xres && yres <= db[i].yres) {
 570                 DPRINTK("Trying %ix%i\n", db[i].xres, db[i].yres);
 571                 if (!fb_try_mode(var, info, &db[i], bpp)) {
 572                     if (diff > (db[i].xres - xres) + (db[i].yres - yres)) {
 573                         diff = (db[i].xres - xres) + (db[i].yres - yres);
 574                         best = i;
 575                     }
 576                 }
 577             }
 578         }
 579         if (best != -1) {
 580             fb_try_mode(var, info, &db[best], bpp);
 581             return 5;
 582         }
 583     }
 584
 585     DPRINTK("Trying default video mode\n");
 586     if (!fb_try_mode(var, info, default_mode, default_bpp))
 587         return 3;
 588
 589     DPRINTK("Trying all modes\n");
 590     for (i = 0; i < dbsize; i++)
 591         if (!fb_try_mode(var, info, &db[i], default_bpp))
 592             return 4;
 593
 594     DPRINTK("No valid mode found\n");
 595     return 0;
 596 }
 597
 598 /**
 599  * fb_var_to_videomode - convert fb_var_screeninfo to fb_videomode
 600  * @mode: pointer to struct fb_videomode
 601  * @var: pointer to struct fb_var_screeninfo
 602  */
 603 void fb_var_to_videomode(struct fb_videomode *mode,
 604                          struct fb_var_screeninfo *var)
 605 {
 606         u32 pixclock, hfreq, htotal, vtotal;
 607
 608         mode->name = NULL;
 609         mode->xres = var->xres;
 610         mode->yres = var->yres;
 611         mode->pixclock = var->pixclock;
 612         mode->hsync_len = var->hsync_len;
 613         mode->vsync_len = var->vsync_len;
 614         mode->left_margin = var->left_margin;
 615         mode->right_margin = var->right_margin;
 616         mode->upper_margin = var->upper_margin;
 617         mode->lower_margin = var->lower_margin;
 618         mode->sync = var->sync;
 619         mode->vmode = var->vmode & FB_VMODE_MASK;
 620         mode->flag = FB_MODE_IS_FROM_VAR;
 621         if (!var->pixclock)
 622                 return;
 623
 624         pixclock = PICOS2KHZ(var->pixclock) * 1000;
 625
 626         htotal = var->xres + var->right_margin + var->hsync_len +
 627                 var->left_margin;
 628         vtotal = var->yres + var->lower_margin + var->vsync_len +
 629                 var->upper_margin;
 630
 631         if (var->vmode & FB_VMODE_INTERLACED)
 632                 vtotal /= 2;
 633         if (var->vmode & FB_VMODE_DOUBLE)
 634                 vtotal *= 2;
 635
 636         hfreq = pixclock/htotal;
 637         mode->refresh = hfreq/vtotal;
 638 }
 639
 640 /**
 641  * fb_videomode_to_var - convert fb_videomode to fb_var_screeninfo
 642  * @var: pointer to struct fb_var_screeninfo
 643  * @mode: pointer to struct fb_videomode
 644  */
 645 void fb_videomode_to_var(struct fb_var_screeninfo *var,
 646                                struct fb_videomode *mode)
 647 {
 648         var->xres = mode->xres;
 649         var->yres = mode->yres;
 650         var->pixclock = mode->pixclock;
 651         var->left_margin = mode->left_margin;
 652         var->hsync_len = mode->hsync_len;
 653         var->vsync_len = mode->vsync_len;
 654         var->right_margin = mode->right_margin;
 655         var->upper_margin = mode->upper_margin;
 656         var->lower_margin = mode->lower_margin;
 657         var->sync = mode->sync;
 658         var->vmode = mode->vmode & FB_VMODE_MASK;
 659 }
 660
 661 /**
 662  * fb_mode_is_equal - compare 2 videomodes
 663  * @mode1: first videomode
 664  * @mode2: second videomode
 665  *
 666  * RETURNS:
 667  * 1 if equal, 0 if not
 668  */
 669 int fb_mode_is_equal(struct fb_videomode *mode1,
 670                      struct fb_videomode *mode2)
 671 {
 672         return (mode1->xres         == mode2->xres &&
 673                 mode1->yres         == mode2->yres &&
 674                 mode1->pixclock     == mode2->pixclock &&
 675                 mode1->hsync_len    == mode2->hsync_len &&
 676                 mode1->vsync_len    == mode2->vsync_len &&
 677                 mode1->left_margin  == mode2->left_margin &&
 678                 mode1->right_margin == mode2->right_margin &&
 679                 mode1->upper_margin == mode2->upper_margin &&
 680                 mode1->lower_margin == mode2->lower_margin &&
 681                 mode1->sync         == mode2->sync &&
 682                 mode1->vmode        == mode2->vmode);
 683 }
 684
 685 /**
 686  * fb_find_best_mode - find best matching videomode
 687  * @var: pointer to struct fb_var_screeninfo
 688  * @head: pointer to struct list_head of modelist
 689  *
 690  * RETURNS:
 691  * struct fb_videomode, NULL if none found
 692  *
 693  * IMPORTANT:
 694  * This function assumes that all modelist entries in
 695  * info->modelist are valid.
 696  *
 697  * NOTES:
 698  * Finds best matching videomode which has an equal or greater dimension than
 699  * var->xres and var->yres.  If more than 1 videomode is found, will return
 700  * the videomode with the highest refresh rate
 701  */
 702 struct fb_videomode *fb_find_best_mode(struct fb_var_screeninfo *var,
 703                                        struct list_head *head)
 704 {
 705         struct list_head *pos;
 706         struct fb_modelist *modelist;
 707         struct fb_videomode *mode, *best = NULL;
 708         u32 diff = -1;
 709
 710         list_for_each(pos, head) {
 711                 u32 d;
 712
 713                 modelist = list_entry(pos, struct fb_modelist, list);
 714                 mode = &modelist->mode;
 715
 716                 if (mode->xres >= var->xres && mode->yres >= var->yres) {
 717                         d = (mode->xres - var->xres) +
 718                                 (mode->yres - var->yres);
 719                         if (diff > d) {
 720                                 diff = d;
 721                                 best = mode;
 722                         } else if (diff == d && mode->refresh > best->refresh)
 723                             best = mode;
 724                 }
 725         }
 726         return best;
 727 }
 728
 729 /**
 730  * fb_find_nearest_mode - find mode closest video mode
 731  *
 732  * @var: pointer to struct fb_var_screeninfo
 733  * @head: pointer to modelist
 734  *
 735  * Finds best matching videomode, smaller or greater in dimension.
 736  * If more than 1 videomode is found, will return the videomode with
 737  * the closest refresh rate
 738  */
 739 struct fb_videomode *fb_find_nearest_mode(struct fb_var_screeninfo *var,
 740                                           struct list_head *head)
 741 {
 742         struct list_head *pos;
 743         struct fb_modelist *modelist;
 744         struct fb_videomode *mode, *best = NULL;
 745         u32 diff = -1, diff_refresh = -1;
 746
 747         list_for_each(pos, head) {
 748                 u32 d;
 749
 750                 modelist = list_entry(pos, struct fb_modelist, list);
 751                 mode = &modelist->mode;
 752
 753                 d = abs(mode->xres - var->xres) +
 754                         abs(mode->yres - var->yres);
 755                 if (diff > d) {
 756                         diff = d;
 757                         best = mode;
 758                 } else if (diff == d) {
 759                         d = abs(mode->refresh - best->refresh);
 760                         if (diff_refresh > d) {
 761                                 diff_refresh = d;
 762                                 best = mode;
 763                         }
 764                 }
 765         }
 766
 767         return best;
 768 }
 769
 770 /**
 771  * fb_match_mode - find a videomode which exactly matches the timings in var
 772  * @var: pointer to struct fb_var_screeninfo
 773  * @head: pointer to struct list_head of modelist
 774  *
 775  * RETURNS:
 776  * struct fb_videomode, NULL if none found
 777  */
 778 struct fb_videomode *fb_match_mode(struct fb_var_screeninfo *var,
 779                                    struct list_head *head)
 780 {
 781         struct list_head *pos;
 782         struct fb_modelist *modelist;
 783         struct fb_videomode *m, mode;
 784
 785         fb_var_to_videomode(&mode, var);
 786         list_for_each(pos, head) {
 787                 modelist = list_entry(pos, struct fb_modelist, list);
 788                 m = &modelist->mode;
 789                 if (fb_mode_is_equal(m, &mode))
 790                         return m;
 791         }
 792         return NULL;
 793 }
 794
 795 /**
 796  * fb_add_videomode: adds videomode entry to modelist
 797  * @mode: videomode to add
 798  * @head: struct list_head of modelist
 799  *
 800  * NOTES:
 801  * Will only add unmatched mode entries
 802  */
 803 int fb_add_videomode(struct fb_videomode *mode, struct list_head *head)
 804 {
 805         struct list_head *pos;
 806         struct fb_modelist *modelist;
 807         struct fb_videomode *m;
 808         int found = 0;
 809
 810         list_for_each(pos, head) {
 811                 modelist = list_entry(pos, struct fb_modelist, list);
 812                 m = &modelist->mode;
 813                 if (fb_mode_is_equal(m, mode)) {
 814                         found = 1;
 815                         break;
 816                 }
 817         }
 818         if (!found) {
 819                 modelist = kmalloc(sizeof(struct fb_modelist),
 820                                                   GFP_KERNEL);
 821
 822                 if (!modelist)
 823                         return -ENOMEM;
 824                 modelist->mode = *mode;
 825                 list_add(&modelist->list, head);
 826         }
 827         return 0;
 828 }
 829
 830 /**
 831  * fb_delete_videomode: removed videomode entry from modelist
 832  * @mode: videomode to remove
 833  * @head: struct list_head of modelist
 834  *
 835  * NOTES:
 836  * Will remove all matching mode entries
 837  */
 838 void fb_delete_videomode(struct fb_videomode *mode, struct list_head *head)
 839 {
 840         struct list_head *pos, *n;
 841         struct fb_modelist *modelist;
 842         struct fb_videomode *m;
 843
 844         list_for_each_safe(pos, n, head) {
 845                 modelist = list_entry(pos, struct fb_modelist, list);
 846                 m = &modelist->mode;
 847                 if (fb_mode_is_equal(m, mode)) {
 848                         list_del(pos);
 849                         kfree(pos);
 850                 }
 851         }
 852 }
 853
 854 /**
 855  * fb_destroy_modelist: destroy modelist
 856  * @head: struct list_head of modelist
 857  */
 858 void fb_destroy_modelist(struct list_head *head)
 859 {
 860         struct list_head *pos, *n;
 861
 862         list_for_each_safe(pos, n, head) {
 863                 list_del(pos);
 864                 kfree(pos);
 865         }
 866 }
 867
 868 /**
 869  * fb_videomode_to_modelist: convert mode array to mode list
 870  * @modedb: array of struct fb_videomode
 871  * @num: number of entries in array
 872  * @head: struct list_head of modelist
 873  */
 874 void fb_videomode_to_modelist(struct fb_videomode *modedb, int num,
 875                               struct list_head *head)
 876 {
 877         int i;
 878
 879         INIT_LIST_HEAD(head);
 880
 881         for (i = 0; i < num; i++) {
 882                 if (fb_add_videomode(&modedb[i], head))
 883                         return;
 884         }
 885 }
 886
 887 EXPORT_SYMBOL(fb_videomode_to_var);
 888 EXPORT_SYMBOL(fb_var_to_videomode);
 889 EXPORT_SYMBOL(fb_mode_is_equal);
 890 EXPORT_SYMBOL(fb_add_videomode);
 891 EXPORT_SYMBOL(fb_delete_videomode);
 892 EXPORT_SYMBOL(fb_destroy_modelist);
 893 EXPORT_SYMBOL(fb_match_mode);
 894 EXPORT_SYMBOL(fb_find_best_mode);
 895 EXPORT_SYMBOL(fb_find_nearest_mode);
 896 EXPORT_SYMBOL(fb_videomode_to_modelist);
 897 EXPORT_SYMBOL(fb_find_mode);