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kernel-ark/drivers/video/modedb.c

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Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
/*
* 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/tty.h>
#include <linux/fb.h>
#include <linux/sched.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 *global_mode_option;
/*
* Standard video mode definitions (taken from XFree86)
*/
#define DEFAULT_MODEDB_INDEX 0
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, 69, 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, 68, 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, 9271, 120, 56, 13, 0, 112, 3,
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
}, {
/* 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
},
};
#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, 53, 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, 60, 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>[-<bpp>][@<refresh>] or
* <name>[-<bpp>][@<refresh>]
*
* with <xres>, <yres>, <bpp> and <refresh> decimal numbers and
* <name> a string.
*
* 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 = sizeof(modedb)/sizeof(*modedb);
}
if (!default_mode)
default_mode = &modedb[DEFAULT_MODEDB_INDEX];
if (!default_bpp)
default_bpp = 8;
/* Did the user specify a video mode? */
if (mode_option || (mode_option = global_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;
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;
} else
goto done;
break;
case '-':
namelen = i;
if (!bpp_specified && !yres_specified) {
bpp = my_atoi(&name[i+1]);
bpp_specified = 1;
} 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;
default:
goto done;
}
}
if (i < 0 && yres_specified) {
xres = my_atoi(name);
res_specified = 1;
}
done:
DPRINTK("Trying specified video mode%s %ix%i\n",
refresh_specified ? "" : " (ignoring refresh rate)", xres, yres);
diff = refresh;
best = -1;
for (i = 0; i < dbsize; i++) {
if ((name_matches(db[i], name, namelen) &&
!fb_try_mode(var, info, &db[i], bpp)))
return 1;
if (res_specified && res_matches(db[i], xres, yres)) {
if(!fb_try_mode(var, info, &db[i], bpp)) {
if(!refresh_specified || db[i].refresh == refresh)
return 1;
else {
if(diff > abs(db[i].refresh - refresh)) {
diff = abs(db[i].refresh - refresh);
best = i;
}
}
}
}
}
if (best != -1) {
fb_try_mode(var, info, &db[best], bpp);
return 2;
}
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,
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;
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,
struct fb_videomode *mode)
{
var->xres = mode->xres;
var->yres = mode->yres;
var->pixclock = mode->pixclock;
var->left_margin = mode->left_margin;
var->hsync_len = mode->hsync_len;
var->vsync_len = mode->vsync_len;
var->right_margin = mode->right_margin;
var->upper_margin = mode->upper_margin;
var->lower_margin = mode->lower_margin;
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(struct fb_videomode *mode1,
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
*/
struct fb_videomode *fb_find_best_mode(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 && mode->refresh > best->refresh)
best = mode;
}
}
return best;
}
/**
* fb_find_nearest_mode - find mode closest video mode
*
* @var: pointer to struct fb_var_screeninfo
* @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
*/
struct fb_videomode *fb_find_nearest_mode(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, diff_refresh = -1;
list_for_each(pos, head) {
u32 d;
modelist = list_entry(pos, struct fb_modelist, list);
mode = &modelist->mode;
d = abs(mode->xres - var->xres) +
abs(mode->yres - var->yres);
if (diff > d) {
diff = d;
best = mode;
} else if (diff == d) {
d = abs(mode->refresh - best->refresh);
if (diff_refresh > d) {
diff_refresh = d;
best = mode;
}
}
}
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
*/
struct fb_videomode *fb_match_mode(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(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(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);
}
}
/**
* 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(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;
}
}
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_delete_videomode);
EXPORT_SYMBOL(fb_destroy_modelist);
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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