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modedb.c

/*
 *  linux/drivers/video/modedb.c -- Standard video mode database management
 *
 *    Copyright (C) 1999 Geert Uytterhoeven
 *
 *    2001 - Documented with DocBook
 *    - Brad Douglas <brad@neruo.com>
 *
 *  This file is subject to the terms and conditions of the GNU General Public
 *  License. See the file COPYING in the main directory of this archive for
 *  more details.
 */

#include <linux/module.h>
#include <linux/fb.h>

#undef DEBUG

#define name_matches(v, s, l) \
    ((v).name && !strncmp((s), (v).name, (l)) && strlen((v).name) == (l))
#define res_matches(v, x, y) \
    ((v).xres == (x) && (v).yres == (y))

#ifdef DEBUG
#define DPRINTK(fmt, args...) printk("modedb %s: " fmt, __FUNCTION__ , ## args)
#else
#define DPRINTK(fmt, args...)
#endif

const char *fb_mode_option;

    /*
     *  Standard video mode definitions (taken from XFree86)
     */

static const struct fb_videomode modedb[] = {
    {
      /* 640x400 @ 70 Hz, 31.5 kHz hsync */
      NULL, 70, 640, 400, 39721, 40, 24, 39, 9, 96, 2,
      0, FB_VMODE_NONINTERLACED
    }, {
      /* 640x480 @ 60 Hz, 31.5 kHz hsync */
      NULL, 60, 640, 480, 39721, 40, 24, 32, 11, 96, 2,
      0, FB_VMODE_NONINTERLACED
    }, {
      /* 800x600 @ 56 Hz, 35.15 kHz hsync */
      NULL, 56, 800, 600, 27777, 128, 24, 22, 1, 72, 2,
      0, FB_VMODE_NONINTERLACED
    }, {
      /* 1024x768 @ 87 Hz interlaced, 35.5 kHz hsync */
      NULL, 87, 1024, 768, 22271, 56, 24, 33, 8, 160, 8,
      0, FB_VMODE_INTERLACED
    }, {
      /* 640x400 @ 85 Hz, 37.86 kHz hsync */
      NULL, 85, 640, 400, 31746, 96, 32, 41, 1, 64, 3,
      FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
    }, {
      /* 640x480 @ 72 Hz, 36.5 kHz hsync */
      NULL, 72, 640, 480, 31746, 144, 40, 30, 8, 40, 3,
      0, FB_VMODE_NONINTERLACED
    }, {
      /* 640x480 @ 75 Hz, 37.50 kHz hsync */
      NULL, 75, 640, 480, 31746, 120, 16, 16, 1, 64, 3,
      0, FB_VMODE_NONINTERLACED
    }, {
      /* 800x600 @ 60 Hz, 37.8 kHz hsync */
      NULL, 60, 800, 600, 25000, 88, 40, 23, 1, 128, 4,
      FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
    }, {
      /* 640x480 @ 85 Hz, 43.27 kHz hsync */
      NULL, 85, 640, 480, 27777, 80, 56, 25, 1, 56, 3,
      0, FB_VMODE_NONINTERLACED
    }, {
      /* 1152x864 @ 89 Hz interlaced, 44 kHz hsync */
      NULL, 89, 1152, 864, 15384, 96, 16, 110, 1, 216, 10,
      0, FB_VMODE_INTERLACED
    }, {
      /* 800x600 @ 72 Hz, 48.0 kHz hsync */
      NULL, 72, 800, 600, 20000, 64, 56, 23, 37, 120, 6,
      FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
    }, {
      /* 1024x768 @ 60 Hz, 48.4 kHz hsync */
      NULL, 60, 1024, 768, 15384, 168, 8, 29, 3, 144, 6,
      0, FB_VMODE_NONINTERLACED
    }, {
      /* 640x480 @ 100 Hz, 53.01 kHz hsync */
      NULL, 100, 640, 480, 21834, 96, 32, 36, 8, 96, 6,
      0, FB_VMODE_NONINTERLACED
    }, {
      /* 1152x864 @ 60 Hz, 53.5 kHz hsync */
      NULL, 60, 1152, 864, 11123, 208, 64, 16, 4, 256, 8,
      0, FB_VMODE_NONINTERLACED
    }, {
      /* 800x600 @ 85 Hz, 55.84 kHz hsync */
      NULL, 85, 800, 600, 16460, 160, 64, 36, 16, 64, 5,
      0, FB_VMODE_NONINTERLACED
    }, {
      /* 1024x768 @ 70 Hz, 56.5 kHz hsync */
      NULL, 70, 1024, 768, 13333, 144, 24, 29, 3, 136, 6,
      0, FB_VMODE_NONINTERLACED
    }, {
      /* 1280x1024 @ 87 Hz interlaced, 51 kHz hsync */
      NULL, 87, 1280, 1024, 12500, 56, 16, 128, 1, 216, 12,
      0, FB_VMODE_INTERLACED
    }, {
      /* 800x600 @ 100 Hz, 64.02 kHz hsync */
      NULL, 100, 800, 600, 14357, 160, 64, 30, 4, 64, 6,
      0, FB_VMODE_NONINTERLACED
    }, {
      /* 1024x768 @ 76 Hz, 62.5 kHz hsync */
      NULL, 76, 1024, 768, 11764, 208, 8, 36, 16, 120, 3,
      0, FB_VMODE_NONINTERLACED
    }, {
      /* 1152x864 @ 70 Hz, 62.4 kHz hsync */
      NULL, 70, 1152, 864, 10869, 106, 56, 20, 1, 160, 10,
      0, FB_VMODE_NONINTERLACED
    }, {
      /* 1280x1024 @ 61 Hz, 64.2 kHz hsync */
      NULL, 61, 1280, 1024, 9090, 200, 48, 26, 1, 184, 3,
      0, FB_VMODE_NONINTERLACED
    }, {
      /* 1400x1050 @ 60Hz, 63.9 kHz hsync */
      NULL, 60, 1400, 1050, 9259, 136, 40, 13, 1, 112, 3,
      0, FB_VMODE_NONINTERLACED     
    }, {
      /* 1400x1050 @ 75,107 Hz, 82,392 kHz +hsync +vsync*/
      NULL, 75, 1400, 1050, 7190, 120, 56, 23, 10, 112, 13,
      FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
    }, {
      /* 1400x1050 @ 60 Hz, ? kHz +hsync +vsync*/
        NULL, 60, 1400, 1050, 9259, 128, 40, 12, 0, 112, 3,
      FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
    }, {
      /* 1024x768 @ 85 Hz, 70.24 kHz hsync */
      NULL, 85, 1024, 768, 10111, 192, 32, 34, 14, 160, 6,
      0, FB_VMODE_NONINTERLACED
    }, {
      /* 1152x864 @ 78 Hz, 70.8 kHz hsync */
      NULL, 78, 1152, 864, 9090, 228, 88, 32, 0, 84, 12,
      0, FB_VMODE_NONINTERLACED
    }, {
      /* 1280x1024 @ 70 Hz, 74.59 kHz hsync */
      NULL, 70, 1280, 1024, 7905, 224, 32, 28, 8, 160, 8,
      0, FB_VMODE_NONINTERLACED
    }, {
      /* 1600x1200 @ 60Hz, 75.00 kHz hsync */
      NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
      FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
    }, {
      /* 1152x864 @ 84 Hz, 76.0 kHz hsync */
      NULL, 84, 1152, 864, 7407, 184, 312, 32, 0, 128, 12,
      0, FB_VMODE_NONINTERLACED
    }, {
      /* 1280x1024 @ 74 Hz, 78.85 kHz hsync */
      NULL, 74, 1280, 1024, 7407, 256, 32, 34, 3, 144, 3,
      0, FB_VMODE_NONINTERLACED
    }, {
      /* 1024x768 @ 100Hz, 80.21 kHz hsync */
      NULL, 100, 1024, 768, 8658, 192, 32, 21, 3, 192, 10,
      0, FB_VMODE_NONINTERLACED
    }, {
      /* 1280x1024 @ 76 Hz, 81.13 kHz hsync */
      NULL, 76, 1280, 1024, 7407, 248, 32, 34, 3, 104, 3,
      0, FB_VMODE_NONINTERLACED
    }, {
      /* 1600x1200 @ 70 Hz, 87.50 kHz hsync */
      NULL, 70, 1600, 1200, 5291, 304, 64, 46, 1, 192, 3,
      0, FB_VMODE_NONINTERLACED
    }, {
      /* 1152x864 @ 100 Hz, 89.62 kHz hsync */
      NULL, 100, 1152, 864, 7264, 224, 32, 17, 2, 128, 19,
      0, FB_VMODE_NONINTERLACED
    }, {
      /* 1280x1024 @ 85 Hz, 91.15 kHz hsync */
      NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3,
      FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
    }, {
      /* 1600x1200 @ 75 Hz, 93.75 kHz hsync */
      NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3,
      FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
    }, {
      /* 1680x1050 @ 60 Hz, 65.191 kHz hsync */
      NULL, 60, 1680, 1050, 6848, 280, 104, 30, 3, 176, 6,
      FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
    }, {
      /* 1600x1200 @ 85 Hz, 105.77 kHz hsync */
      NULL, 85, 1600, 1200, 4545, 272, 16, 37, 4, 192, 3,
      FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
    }, {
      /* 1280x1024 @ 100 Hz, 107.16 kHz hsync */
      NULL, 100, 1280, 1024, 5502, 256, 32, 26, 7, 128, 15,
      0, FB_VMODE_NONINTERLACED
    }, {
      /* 1800x1440 @ 64Hz, 96.15 kHz hsync  */
      NULL, 64, 1800, 1440, 4347, 304, 96, 46, 1, 192, 3,
      FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
    }, {
      /* 1800x1440 @ 70Hz, 104.52 kHz hsync  */
      NULL, 70, 1800, 1440, 4000, 304, 96, 46, 1, 192, 3,
      FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
    }, {
      /* 512x384 @ 78 Hz, 31.50 kHz hsync */
      NULL, 78, 512, 384, 49603, 48, 16, 16, 1, 64, 3,
      0, FB_VMODE_NONINTERLACED
    }, {
      /* 512x384 @ 85 Hz, 34.38 kHz hsync */
      NULL, 85, 512, 384, 45454, 48, 16, 16, 1, 64, 3,
      0, FB_VMODE_NONINTERLACED
    }, {
      /* 320x200 @ 70 Hz, 31.5 kHz hsync, 8:5 aspect ratio */
      NULL, 70, 320, 200, 79440, 16, 16, 20, 4, 48, 1,
      0, FB_VMODE_DOUBLE
    }, {
      /* 320x240 @ 60 Hz, 31.5 kHz hsync, 4:3 aspect ratio */
      NULL, 60, 320, 240, 79440, 16, 16, 16, 5, 48, 1,
      0, FB_VMODE_DOUBLE
    }, {
      /* 320x240 @ 72 Hz, 36.5 kHz hsync */
      NULL, 72, 320, 240, 63492, 16, 16, 16, 4, 48, 2,
      0, FB_VMODE_DOUBLE
    }, {
      /* 400x300 @ 56 Hz, 35.2 kHz hsync, 4:3 aspect ratio */
      NULL, 56, 400, 300, 55555, 64, 16, 10, 1, 32, 1,
      0, FB_VMODE_DOUBLE
    }, {
      /* 400x300 @ 60 Hz, 37.8 kHz hsync */
      NULL, 60, 400, 300, 50000, 48, 16, 11, 1, 64, 2,
      0, FB_VMODE_DOUBLE
    }, {
      /* 400x300 @ 72 Hz, 48.0 kHz hsync */
      NULL, 72, 400, 300, 40000, 32, 24, 11, 19, 64, 3,
      0, FB_VMODE_DOUBLE
    }, {
      /* 480x300 @ 56 Hz, 35.2 kHz hsync, 8:5 aspect ratio */
      NULL, 56, 480, 300, 46176, 80, 16, 10, 1, 40, 1,
      0, FB_VMODE_DOUBLE
    }, {
      /* 480x300 @ 60 Hz, 37.8 kHz hsync */
      NULL, 60, 480, 300, 41858, 56, 16, 11, 1, 80, 2,
      0, FB_VMODE_DOUBLE
    }, {
      /* 480x300 @ 63 Hz, 39.6 kHz hsync */
      NULL, 63, 480, 300, 40000, 56, 16, 11, 1, 80, 2,
      0, FB_VMODE_DOUBLE
    }, {
      /* 480x300 @ 72 Hz, 48.0 kHz hsync */
      NULL, 72, 480, 300, 33386, 40, 24, 11, 19, 80, 3,
      0, FB_VMODE_DOUBLE
    }, {
      /* 1920x1200 @ 60 Hz, 74.5 Khz hsync */
      NULL, 60, 1920, 1200, 5177, 128, 336, 1, 38, 208, 3,
      FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
      FB_VMODE_NONINTERLACED
    }, {
      /* 1152x768, 60 Hz, PowerBook G4 Titanium I and II */
      NULL, 60, 1152, 768, 14047, 158, 26, 29, 3, 136, 6,
      FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
    }, {
      /* 1366x768, 60 Hz, 47.403 kHz hsync, WXGA 16:9 aspect ratio */
      NULL, 60, 1366, 768, 13806, 120, 10, 14, 3, 32, 5,
      0, FB_VMODE_NONINTERLACED
   }, {
      /* 1280x800, 60 Hz, 47.403 kHz hsync, WXGA 16:10 aspect ratio */
      NULL, 60, 1280, 800, 12048, 200, 64, 24, 1, 136, 3,
      0, FB_VMODE_NONINTERLACED
    },
};

#ifdef CONFIG_FB_MODE_HELPERS
const struct fb_videomode vesa_modes[] = {
      /* 0 640x350-85 VESA */
      { NULL, 85, 640, 350, 31746,  96, 32, 60, 32, 64, 3,
        FB_SYNC_HOR_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA},
      /* 1 640x400-85 VESA */
      { NULL, 85, 640, 400, 31746,  96, 32, 41, 01, 64, 3,
        FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
      /* 2 720x400-85 VESA */
      { NULL, 85, 721, 400, 28169, 108, 36, 42, 01, 72, 3,
        FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
      /* 3 640x480-60 VESA */
      { NULL, 60, 640, 480, 39682,  48, 16, 33, 10, 96, 2, 
        0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
      /* 4 640x480-72 VESA */
      { NULL, 72, 640, 480, 31746, 128, 24, 29, 9, 40, 2, 
        0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
      /* 5 640x480-75 VESA */
      { NULL, 75, 640, 480, 31746, 120, 16, 16, 01, 64, 3,
        0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
      /* 6 640x480-85 VESA */
      { NULL, 85, 640, 480, 27777, 80, 56, 25, 01, 56, 3,
        0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
      /* 7 800x600-56 VESA */
      { NULL, 56, 800, 600, 27777, 128, 24, 22, 01, 72, 2,
        FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
        FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
      /* 8 800x600-60 VESA */
      { NULL, 60, 800, 600, 25000, 88, 40, 23, 01, 128, 4,
        FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
        FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
      /* 9 800x600-72 VESA */
      { NULL, 72, 800, 600, 20000, 64, 56, 23, 37, 120, 6,
        FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
        FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
      /* 10 800x600-75 VESA */
      { NULL, 75, 800, 600, 20202, 160, 16, 21, 01, 80, 3,
        FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
        FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
      /* 11 800x600-85 VESA */
      { NULL, 85, 800, 600, 17761, 152, 32, 27, 01, 64, 3,
        FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
        FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
        /* 12 1024x768i-43 VESA */
      { NULL, 43, 1024, 768, 22271, 56, 8, 41, 0, 176, 8,
        FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
        FB_VMODE_INTERLACED, FB_MODE_IS_VESA },
      /* 13 1024x768-60 VESA */
      { NULL, 60, 1024, 768, 15384, 160, 24, 29, 3, 136, 6,
        0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
      /* 14 1024x768-70 VESA */
      { NULL, 70, 1024, 768, 13333, 144, 24, 29, 3, 136, 6,
        0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
      /* 15 1024x768-75 VESA */
      { NULL, 75, 1024, 768, 12690, 176, 16, 28, 1, 96, 3,
        FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
        FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
      /* 16 1024x768-85 VESA */
      { NULL, 85, 1024, 768, 10582, 208, 48, 36, 1, 96, 3,
        FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
        FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
      /* 17 1152x864-75 VESA */
      { NULL, 75, 1153, 864, 9259, 256, 64, 32, 1, 128, 3,
        FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
        FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
      /* 18 1280x960-60 VESA */
      { NULL, 60, 1280, 960, 9259, 312, 96, 36, 1, 112, 3,
        FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
        FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
      /* 19 1280x960-85 VESA */
      { NULL, 85, 1280, 960, 6734, 224, 64, 47, 1, 160, 3,
        FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
        FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
      /* 20 1280x1024-60 VESA */
      { NULL, 60, 1280, 1024, 9259, 248, 48, 38, 1, 112, 3,
        FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
        FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
      /* 21 1280x1024-75 VESA */
      { NULL, 75, 1280, 1024, 7407, 248, 16, 38, 1, 144, 3,
        FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
        FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
      /* 22 1280x1024-85 VESA */
      { NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3,
        FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
        FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
      /* 23 1600x1200-60 VESA */
      { NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
        FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
        FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
      /* 24 1600x1200-65 VESA */
      { NULL, 65, 1600, 1200, 5698, 304,  64, 46, 1, 192, 3,
        FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
        FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
      /* 25 1600x1200-70 VESA */
      { NULL, 70, 1600, 1200, 5291, 304, 64, 46, 1, 192, 3,
        FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
        FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
      /* 26 1600x1200-75 VESA */
      { NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3, 
        FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
        FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
      /* 27 1600x1200-85 VESA */
      { NULL, 85, 1600, 1200, 4357, 304, 64, 46, 1, 192, 3,
        FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
        FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
      /* 28 1792x1344-60 VESA */
      { NULL, 60, 1792, 1344, 4882, 328, 128, 46, 1, 200, 3,
        FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
      /* 29 1792x1344-75 VESA */
      { NULL, 75, 1792, 1344, 3831, 352, 96, 69, 1, 216, 3,
        FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
      /* 30 1856x1392-60 VESA */
      { NULL, 60, 1856, 1392, 4580, 352, 96, 43, 1, 224, 3,
        FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
      /* 31 1856x1392-75 VESA */
      { NULL, 75, 1856, 1392, 3472, 352, 128, 104, 1, 224, 3,
        FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
      /* 32 1920x1440-60 VESA */
      { NULL, 60, 1920, 1440, 4273, 344, 128, 56, 1, 200, 3,
        FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
      /* 33 1920x1440-75 VESA */
      { NULL, 75, 1920, 1440, 3367, 352, 144, 56, 1, 224, 3,
        FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
};
EXPORT_SYMBOL(vesa_modes);
#endif /* CONFIG_FB_MODE_HELPERS */

static int my_atoi(const char *name)
{
    int val = 0;

    for (;; name++) {
      switch (*name) {
          case '0' ... '9':
            val = 10*val+(*name-'0');
            break;
          default:
            return val;
      }
    }
}

/**
 *    fb_try_mode - test a video mode
 *    @var: frame buffer user defined part of display
 *    @info: frame buffer info structure
 *    @mode: frame buffer video mode structure
 *    @bpp: color depth in bits per pixel
 *
 *    Tries a video mode to test it's validity for device @info.
 *
 *    Returns 1 on success.
 *
 */

static int fb_try_mode(struct fb_var_screeninfo *var, struct fb_info *info,
                   const struct fb_videomode *mode, unsigned int bpp)
{
    int err = 0;

    DPRINTK("Trying mode %s %dx%d-%d@%d\n", mode->name ? mode->name : "noname",
          mode->xres, mode->yres, bpp, mode->refresh);
    var->xres = mode->xres;
    var->yres = mode->yres;
    var->xres_virtual = mode->xres;
    var->yres_virtual = mode->yres;
    var->xoffset = 0;
    var->yoffset = 0;
    var->bits_per_pixel = bpp;
    var->activate |= FB_ACTIVATE_TEST;
    var->pixclock = mode->pixclock;
    var->left_margin = mode->left_margin;
    var->right_margin = mode->right_margin;
    var->upper_margin = mode->upper_margin;
    var->lower_margin = mode->lower_margin;
    var->hsync_len = mode->hsync_len;
    var->vsync_len = mode->vsync_len;
    var->sync = mode->sync;
    var->vmode = mode->vmode;
    if (info->fbops->fb_check_var)
      err = info->fbops->fb_check_var(var, info);
    var->activate &= ~FB_ACTIVATE_TEST;
    return err;
}

/**
 *    fb_find_mode - finds a valid video mode
 *    @var: frame buffer user defined part of display
 *    @info: frame buffer info structure
 *    @mode_option: string video mode to find
 *    @db: video mode database
 *    @dbsize: size of @db
 *    @default_mode: default video mode to fall back to
 *    @default_bpp: default color depth in bits per pixel
 *
 *    Finds a suitable video mode, starting with the specified mode
 *    in @mode_option with fallback to @default_mode.  If
 *    @default_mode fails, all modes in the video mode database will
 *    be tried.
 *
 *    Valid mode specifiers for @mode_option:
 *
 *    <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m] or
 *    <name>[-<bpp>][@<refresh>]
 *
 *    with <xres>, <yres>, <bpp> and <refresh> decimal numbers and
 *    <name> a string.
 *
 *      If 'M' is present after yres (and before refresh/bpp if present),
 *      the function will compute the timings using VESA(tm) Coordinated
 *      Video Timings (CVT).  If 'R' is present after 'M', will compute with
 *      reduced blanking (for flatpanels).  If 'i' is present, compute
 *      interlaced mode.  If 'm' is present, add margins equal to 1.8%
 *      of xres rounded down to 8 pixels, and 1.8% of yres. The char
 *      'i' and 'm' must be after 'M' and 'R'. Example:
 *
 *      1024x768MR-8@60m - Reduced blank with margins at 60Hz.
 *
 *    NOTE: The passed struct @var is _not_ cleared!  This allows you
 *    to supply values for e.g. the grayscale and accel_flags fields.
 *
 *    Returns zero for failure, 1 if using specified @mode_option,
 *    2 if using specified @mode_option with an ignored refresh rate,
 *    3 if default mode is used, 4 if fall back to any valid mode.
 *
 */

int fb_find_mode(struct fb_var_screeninfo *var,
             struct fb_info *info, const char *mode_option,
             const struct fb_videomode *db, unsigned int dbsize,
             const struct fb_videomode *default_mode,
             unsigned int default_bpp)
{
    int i;

    /* Set up defaults */
    if (!db) {
      db = modedb;
      dbsize = ARRAY_SIZE(modedb);
    }

    if (!default_mode)
      default_mode = &db[0];

    if (!default_bpp)
      default_bpp = 8;

    /* Did the user specify a video mode? */
    if (!mode_option)
      mode_option = fb_mode_option;
    if (mode_option) {
      const char *name = mode_option;
      unsigned int namelen = strlen(name);
      int res_specified = 0, bpp_specified = 0, refresh_specified = 0;
      unsigned int xres = 0, yres = 0, bpp = default_bpp, refresh = 0;
      int yres_specified = 0, cvt = 0, rb = 0, interlace = 0, margins = 0;
      u32 best, diff;

      for (i = namelen-1; i >= 0; i--) {
          switch (name[i]) {
            case '@':
                namelen = i;
                if (!refresh_specified && !bpp_specified &&
                  !yres_specified) {
                  refresh = my_atoi(&name[i+1]);
                  refresh_specified = 1;
                  if (cvt || rb)
                      cvt = 0;
                } else
                  goto done;
                break;
            case '-':
                namelen = i;
                if (!bpp_specified && !yres_specified) {
                  bpp = my_atoi(&name[i+1]);
                  bpp_specified = 1;
                  if (cvt || rb)
                      cvt = 0;
                } else
                  goto done;
                break;
            case 'x':
                if (!yres_specified) {
                  yres = my_atoi(&name[i+1]);
                  yres_specified = 1;
                } else
                  goto done;
                break;
            case '0' ... '9':
                break;
            case 'M':
                if (!yres_specified)
                  cvt = 1;
                break;
            case 'R':
                if (!cvt)
                  rb = 1;
                break;
            case 'm':
                if (!cvt)
                  margins = 1;
                break;
            case 'i':
                if (!cvt)
                  interlace = 1;
                break;
            default:
                goto done;
          }
      }
      if (i < 0 && yres_specified) {
          xres = my_atoi(name);
          res_specified = 1;
      }
done:
      if (cvt) {
          struct fb_videomode cvt_mode;
          int ret;

          DPRINTK("CVT mode %dx%d@%dHz%s%s%s\n", xres, yres,
                (refresh) ? refresh : 60, (rb) ? " reduced blanking" :
                "", (margins) ? " with margins" : "", (interlace) ?
                " interlaced" : "");

          cvt_mode.xres = xres;
          cvt_mode.yres = yres;
          cvt_mode.refresh = (refresh) ? refresh : 60;

          if (interlace)
            cvt_mode.vmode |= FB_VMODE_INTERLACED;
          else
            cvt_mode.vmode &= ~FB_VMODE_INTERLACED;

          ret = fb_find_mode_cvt(&cvt_mode, margins, rb);

          if (!ret && !fb_try_mode(var, info, &cvt_mode, bpp)) {
            DPRINTK("modedb CVT: CVT mode ok\n");
            return 1;
          }

          DPRINTK("CVT mode invalid, getting mode from database\n");
      }

      DPRINTK("Trying specified video mode%s %ix%i\n",
          refresh_specified ? "" : " (ignoring refresh rate)", xres, yres);

      if (!refresh_specified) {
            /*
             * If the caller has provided a custom mode database and a
             * valid monspecs structure, we look for the mode with the
             * highest refresh rate.  Otherwise we play it safe it and
             * try to find a mode with a refresh rate closest to the
             * standard 60 Hz.
             */
            if (db != modedb &&
                info->monspecs.vfmin && info->monspecs.vfmax &&
                info->monspecs.hfmin && info->monspecs.hfmax &&
                info->monspecs.dclkmax) {
                  refresh = 1000;
            } else {
                  refresh = 60;
            }
      }

      diff = -1;
      best = -1;
      for (i = 0; i < dbsize; i++) {
            if ((name_matches(db[i], name, namelen) ||
                (res_specified && res_matches(db[i], xres, yres))) &&
                !fb_try_mode(var, info, &db[i], bpp)) {
                  if (refresh_specified && db[i].refresh == refresh) {
                        return 1;
                  } else {
                        if (abs(db[i].refresh - refresh) < diff) {
                              diff = abs(db[i].refresh - refresh);
                              best = i;
                        }
                  }
            }
      }
      if (best != -1) {
            fb_try_mode(var, info, &db[best], bpp);
            return (refresh_specified) ? 2 : 1;
      }

      diff = xres + yres;
      best = -1;
      DPRINTK("Trying best-fit modes\n");
      for (i = 0; i < dbsize; i++) {
          if (xres <= db[i].xres && yres <= db[i].yres) {
            DPRINTK("Trying %ix%i\n", db[i].xres, db[i].yres);
            if (!fb_try_mode(var, info, &db[i], bpp)) {
                if (diff > (db[i].xres - xres) + (db[i].yres - yres)) {
                  diff = (db[i].xres - xres) + (db[i].yres - yres);
                  best = i;
                }
            }
          }
      }
      if (best != -1) {
          fb_try_mode(var, info, &db[best], bpp);
          return 5;
      }
    }

    DPRINTK("Trying default video mode\n");
    if (!fb_try_mode(var, info, default_mode, default_bpp))
      return 3;

    DPRINTK("Trying all modes\n");
    for (i = 0; i < dbsize; i++)
      if (!fb_try_mode(var, info, &db[i], default_bpp))
          return 4;

    DPRINTK("No valid mode found\n");
    return 0;
}

/**
 * fb_var_to_videomode - convert fb_var_screeninfo to fb_videomode
 * @mode: pointer to struct fb_videomode
 * @var: pointer to struct fb_var_screeninfo
 */
void fb_var_to_videomode(struct fb_videomode *mode,
                   const struct fb_var_screeninfo *var)
{
      u32 pixclock, hfreq, htotal, vtotal;

      mode->name = NULL;
      mode->xres = var->xres;
      mode->yres = var->yres;
      mode->pixclock = var->pixclock;
      mode->hsync_len = var->hsync_len;
      mode->vsync_len = var->vsync_len;
      mode->left_margin = var->left_margin;
      mode->right_margin = var->right_margin;
      mode->upper_margin = var->upper_margin;
      mode->lower_margin = var->lower_margin;
      mode->sync = var->sync;
      mode->vmode = var->vmode & FB_VMODE_MASK;
      mode->flag = FB_MODE_IS_FROM_VAR;
      mode->refresh = 0;

      if (!var->pixclock)
            return;

      pixclock = PICOS2KHZ(var->pixclock) * 1000;

      htotal = var->xres + var->right_margin + var->hsync_len +
            var->left_margin;
      vtotal = var->yres + var->lower_margin + var->vsync_len +
            var->upper_margin;

      if (var->vmode & FB_VMODE_INTERLACED)
            vtotal /= 2;
      if (var->vmode & FB_VMODE_DOUBLE)
            vtotal *= 2;

      hfreq = pixclock/htotal;
      mode->refresh = hfreq/vtotal;
}

/**
 * fb_videomode_to_var - convert fb_videomode to fb_var_screeninfo
 * @var: pointer to struct fb_var_screeninfo
 * @mode: pointer to struct fb_videomode
 */
void fb_videomode_to_var(struct fb_var_screeninfo *var,
                   const struct fb_videomode *mode)
{
      var->xres = mode->xres;
      var->yres = mode->yres;
      var->xres_virtual = mode->xres;
      var->yres_virtual = mode->yres;
      var->xoffset = 0;
      var->yoffset = 0;
      var->pixclock = mode->pixclock;
      var->left_margin = mode->left_margin;
      var->right_margin = mode->right_margin;
      var->upper_margin = mode->upper_margin;
      var->lower_margin = mode->lower_margin;
      var->hsync_len = mode->hsync_len;
      var->vsync_len = mode->vsync_len;
      var->sync = mode->sync;
      var->vmode = mode->vmode & FB_VMODE_MASK;
}

/**
 * fb_mode_is_equal - compare 2 videomodes
 * @mode1: first videomode
 * @mode2: second videomode
 *
 * RETURNS:
 * 1 if equal, 0 if not
 */
int fb_mode_is_equal(const struct fb_videomode *mode1,
                 const struct fb_videomode *mode2)
{
      return (mode1->xres         == mode2->xres &&
            mode1->yres         == mode2->yres &&
            mode1->pixclock     == mode2->pixclock &&
            mode1->hsync_len    == mode2->hsync_len &&
            mode1->vsync_len    == mode2->vsync_len &&
            mode1->left_margin  == mode2->left_margin &&
            mode1->right_margin == mode2->right_margin &&
            mode1->upper_margin == mode2->upper_margin &&
            mode1->lower_margin == mode2->lower_margin &&
            mode1->sync         == mode2->sync &&
            mode1->vmode        == mode2->vmode);
}

/**
 * fb_find_best_mode - find best matching videomode
 * @var: pointer to struct fb_var_screeninfo
 * @head: pointer to struct list_head of modelist
 *
 * RETURNS:
 * struct fb_videomode, NULL if none found
 *
 * IMPORTANT:
 * This function assumes that all modelist entries in
 * info->modelist are valid.
 *
 * NOTES:
 * Finds best matching videomode which has an equal or greater dimension than
 * var->xres and var->yres.  If more than 1 videomode is found, will return
 * the videomode with the highest refresh rate
 */
const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var,
                                   struct list_head *head)
{
      struct list_head *pos;
      struct fb_modelist *modelist;
      struct fb_videomode *mode, *best = NULL;
      u32 diff = -1;

      list_for_each(pos, head) {
            u32 d;

            modelist = list_entry(pos, struct fb_modelist, list);
            mode = &modelist->mode;

            if (mode->xres >= var->xres && mode->yres >= var->yres) {
                  d = (mode->xres - var->xres) +
                        (mode->yres - var->yres);
                  if (diff > d) {
                        diff = d;
                        best = mode;
                  } else if (diff == d && best &&
                           mode->refresh > best->refresh)
                        best = mode;
            }
      }
      return best;
}

/**
 * fb_find_nearest_mode - find closest videomode
 *
 * @mode: pointer to struct fb_videomode
 * @head: pointer to modelist
 *
 * Finds best matching videomode, smaller or greater in dimension.
 * If more than 1 videomode is found, will return the videomode with
 * the closest refresh rate.
 */
const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode,
                                      struct list_head *head)
{
      struct list_head *pos;
      struct fb_modelist *modelist;
      struct fb_videomode *cmode, *best = NULL;
      u32 diff = -1, diff_refresh = -1;

      list_for_each(pos, head) {
            u32 d;

            modelist = list_entry(pos, struct fb_modelist, list);
            cmode = &modelist->mode;

            d = abs(cmode->xres - mode->xres) +
                  abs(cmode->yres - mode->yres);
            if (diff > d) {
                  diff = d;
                  best = cmode;
            } else if (diff == d) {
                  d = abs(cmode->refresh - mode->refresh);
                  if (diff_refresh > d) {
                        diff_refresh = d;
                        best = cmode;
                  }
            }
      }

      return best;
}

/**
 * fb_match_mode - find a videomode which exactly matches the timings in var
 * @var: pointer to struct fb_var_screeninfo
 * @head: pointer to struct list_head of modelist
 *
 * RETURNS:
 * struct fb_videomode, NULL if none found
 */
const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var,
                               struct list_head *head)
{
      struct list_head *pos;
      struct fb_modelist *modelist;
      struct fb_videomode *m, mode;

      fb_var_to_videomode(&mode, var);
      list_for_each(pos, head) {
            modelist = list_entry(pos, struct fb_modelist, list);
            m = &modelist->mode;
            if (fb_mode_is_equal(m, &mode))
                  return m;
      }
      return NULL;
}

/**
 * fb_add_videomode: adds videomode entry to modelist
 * @mode: videomode to add
 * @head: struct list_head of modelist
 *
 * NOTES:
 * Will only add unmatched mode entries
 */
int fb_add_videomode(const struct fb_videomode *mode, struct list_head *head)
{
      struct list_head *pos;
      struct fb_modelist *modelist;
      struct fb_videomode *m;
      int found = 0;

      list_for_each(pos, head) {
            modelist = list_entry(pos, struct fb_modelist, list);
            m = &modelist->mode;
            if (fb_mode_is_equal(m, mode)) {
                  found = 1;
                  break;
            }
      }
      if (!found) {
            modelist = kmalloc(sizeof(struct fb_modelist),
                                      GFP_KERNEL);

            if (!modelist)
                  return -ENOMEM;
            modelist->mode = *mode;
            list_add(&modelist->list, head);
      }
      return 0;
}

/**
 * fb_delete_videomode: removed videomode entry from modelist
 * @mode: videomode to remove
 * @head: struct list_head of modelist
 *
 * NOTES:
 * Will remove all matching mode entries
 */
void fb_delete_videomode(const struct fb_videomode *mode,
                   struct list_head *head)
{
      struct list_head *pos, *n;
      struct fb_modelist *modelist;
      struct fb_videomode *m;

      list_for_each_safe(pos, n, head) {
            modelist = list_entry(pos, struct fb_modelist, list);
            m = &modelist->mode;
            if (fb_mode_is_equal(m, mode)) {
                  list_del(pos);
                  kfree(pos);
            }
      }
}

/**
 * fb_destroy_modelist: destroy modelist
 * @head: struct list_head of modelist
 */
void fb_destroy_modelist(struct list_head *head)
{
      struct list_head *pos, *n;

      list_for_each_safe(pos, n, head) {
            list_del(pos);
            kfree(pos);
      }
}
EXPORT_SYMBOL_GPL(fb_destroy_modelist);

/**
 * fb_videomode_to_modelist: convert mode array to mode list
 * @modedb: array of struct fb_videomode
 * @num: number of entries in array
 * @head: struct list_head of modelist
 */
void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num,
                        struct list_head *head)
{
      int i;

      INIT_LIST_HEAD(head);

      for (i = 0; i < num; i++) {
            if (fb_add_videomode(&modedb[i], head))
                  return;
      }
}

const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs,
                                      struct list_head *head)
{
      struct list_head *pos;
      struct fb_modelist *modelist;
      const struct fb_videomode *m, *m1 = NULL, *md = NULL, *best = NULL;
      int first = 0;

      if (!head->prev || !head->next || list_empty(head))
            goto finished;

      /* get the first detailed mode and the very first mode */
      list_for_each(pos, head) {
            modelist = list_entry(pos, struct fb_modelist, list);
            m = &modelist->mode;

            if (!first) {
                  m1 = m;
                  first = 1;
            }

            if (m->flag & FB_MODE_IS_FIRST) {
                  md = m;
                  break;
            }
      }

      /* first detailed timing is preferred */
      if (specs->misc & FB_MISC_1ST_DETAIL) {
            best = md;
            goto finished;
      }

      /* find best mode based on display width and height */
      if (specs->max_x && specs->max_y) {
            struct fb_var_screeninfo var;

            memset(&var, 0, sizeof(struct fb_var_screeninfo));
            var.xres = (specs->max_x * 7200)/254;
            var.yres = (specs->max_y * 7200)/254;
            m = fb_find_best_mode(&var, head);
            if (m) {
                  best = m;
                  goto finished;
            }
      }

      /* use first detailed mode */
      if (md) {
            best = md;
            goto finished;
      }

      /* last resort, use the very first mode */
      best = m1;
finished:
      return best;
}
EXPORT_SYMBOL(fb_find_best_display);

EXPORT_SYMBOL(fb_videomode_to_var);
EXPORT_SYMBOL(fb_var_to_videomode);
EXPORT_SYMBOL(fb_mode_is_equal);
EXPORT_SYMBOL(fb_add_videomode);
EXPORT_SYMBOL(fb_match_mode);
EXPORT_SYMBOL(fb_find_best_mode);
EXPORT_SYMBOL(fb_find_nearest_mode);
EXPORT_SYMBOL(fb_videomode_to_modelist);
EXPORT_SYMBOL(fb_find_mode);

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