modedb.c 37.1 KB
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/*
 *  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>
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#include <linux/slab.h>
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#include <linux/fb.h>
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#include <linux/kernel.h>
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#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
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#define DPRINTK(fmt, args...)	printk("modedb %s: " fmt, __func__ , ## args)
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#else
#define DPRINTK(fmt, args...)
#endif

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/*
 *  Standard video mode definitions (taken from XFree86)
 */
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static const struct fb_videomode modedb[] = {
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	/* 640x400 @ 70 Hz, 31.5 kHz hsync */
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	{ NULL, 70, 640, 400, 39721, 40, 24, 39, 9, 96, 2, 0,
		FB_VMODE_NONINTERLACED },

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	/* 640x480 @ 60 Hz, 31.5 kHz hsync */
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	{ NULL, 60, 640, 480, 39721, 40, 24, 32, 11, 96, 2,	0,
		FB_VMODE_NONINTERLACED },

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	/* 800x600 @ 56 Hz, 35.15 kHz hsync */
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	{ NULL, 56, 800, 600, 27777, 128, 24, 22, 1, 72, 2,	0,
		FB_VMODE_NONINTERLACED },

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	/* 1024x768 @ 87 Hz interlaced, 35.5 kHz hsync */
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	{ NULL, 87, 1024, 768, 22271, 56, 24, 33, 8, 160, 8, 0,
		FB_VMODE_INTERLACED },

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	/* 640x400 @ 85 Hz, 37.86 kHz hsync */
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	{ NULL, 85, 640, 400, 31746, 96, 32, 41, 1, 64, 3,
		FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED },

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	/* 640x480 @ 72 Hz, 36.5 kHz hsync */
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	{ NULL, 72, 640, 480, 31746, 144, 40, 30, 8, 40, 3, 0,
		FB_VMODE_NONINTERLACED },

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	/* 640x480 @ 75 Hz, 37.50 kHz hsync */
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	{ NULL, 75, 640, 480, 31746, 120, 16, 16, 1, 64, 3,	0,
		FB_VMODE_NONINTERLACED },

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	/* 800x600 @ 60 Hz, 37.8 kHz hsync */
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	{ NULL, 60, 800, 600, 25000, 88, 40, 23, 1, 128, 4,
		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
		FB_VMODE_NONINTERLACED },

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	/* 640x480 @ 85 Hz, 43.27 kHz hsync */
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	{ NULL, 85, 640, 480, 27777, 80, 56, 25, 1, 56, 3, 0,
		FB_VMODE_NONINTERLACED },

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	/* 1152x864 @ 89 Hz interlaced, 44 kHz hsync */
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	{ NULL, 89, 1152, 864, 15384, 96, 16, 110, 1, 216, 10, 0,
		FB_VMODE_INTERLACED },
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	/* 800x600 @ 72 Hz, 48.0 kHz hsync */
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	{ NULL, 72, 800, 600, 20000, 64, 56, 23, 37, 120, 6,
		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
		FB_VMODE_NONINTERLACED },

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	/* 1024x768 @ 60 Hz, 48.4 kHz hsync */
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	{ NULL, 60, 1024, 768, 15384, 168, 8, 29, 3, 144, 6, 0,
		FB_VMODE_NONINTERLACED },

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	/* 640x480 @ 100 Hz, 53.01 kHz hsync */
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	{ NULL, 100, 640, 480, 21834, 96, 32, 36, 8, 96, 6,	0,
		FB_VMODE_NONINTERLACED },

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	/* 1152x864 @ 60 Hz, 53.5 kHz hsync */
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	{ NULL, 60, 1152, 864, 11123, 208, 64, 16, 4, 256, 8, 0,
		FB_VMODE_NONINTERLACED },

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	/* 800x600 @ 85 Hz, 55.84 kHz hsync */
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	{ NULL, 85, 800, 600, 16460, 160, 64, 36, 16, 64, 5, 0,
		FB_VMODE_NONINTERLACED },

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	/* 1024x768 @ 70 Hz, 56.5 kHz hsync */
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	{ NULL, 70, 1024, 768, 13333, 144, 24, 29, 3, 136, 6, 0,
		FB_VMODE_NONINTERLACED },

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	/* 1280x1024 @ 87 Hz interlaced, 51 kHz hsync */
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	{ NULL, 87, 1280, 1024, 12500, 56, 16, 128, 1, 216, 12,	0,
		FB_VMODE_INTERLACED },

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	/* 800x600 @ 100 Hz, 64.02 kHz hsync */
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	{ NULL, 100, 800, 600, 14357, 160, 64, 30, 4, 64, 6, 0,
		FB_VMODE_NONINTERLACED },

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	/* 1024x768 @ 76 Hz, 62.5 kHz hsync */
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	{ NULL, 76, 1024, 768, 11764, 208, 8, 36, 16, 120, 3, 0,
		FB_VMODE_NONINTERLACED },

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	/* 1152x864 @ 70 Hz, 62.4 kHz hsync */
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	{ NULL, 70, 1152, 864, 10869, 106, 56, 20, 1, 160, 10, 0,
		FB_VMODE_NONINTERLACED },

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	/* 1280x1024 @ 61 Hz, 64.2 kHz hsync */
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	{ NULL, 61, 1280, 1024, 9090, 200, 48, 26, 1, 184, 3, 0,
		FB_VMODE_NONINTERLACED },

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	/* 1400x1050 @ 60Hz, 63.9 kHz hsync */
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	{ NULL, 60, 1400, 1050, 9259, 136, 40, 13, 1, 112, 3, 0,
		FB_VMODE_NONINTERLACED },

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	/* 1400x1050 @ 75,107 Hz, 82,392 kHz +hsync +vsync*/
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	{ NULL, 75, 1400, 1050, 7190, 120, 56, 23, 10, 112, 13,
		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
		FB_VMODE_NONINTERLACED },

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	/* 1400x1050 @ 60 Hz, ? kHz +hsync +vsync*/
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	{ NULL, 60, 1400, 1050, 9259, 128, 40, 12, 0, 112, 3,
		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
		FB_VMODE_NONINTERLACED },

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	/* 1024x768 @ 85 Hz, 70.24 kHz hsync */
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	{ NULL, 85, 1024, 768, 10111, 192, 32, 34, 14, 160, 6, 0,
		FB_VMODE_NONINTERLACED },

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	/* 1152x864 @ 78 Hz, 70.8 kHz hsync */
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	{ NULL, 78, 1152, 864, 9090, 228, 88, 32, 0, 84, 12, 0,
		FB_VMODE_NONINTERLACED },

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	/* 1280x1024 @ 70 Hz, 74.59 kHz hsync */
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	{ NULL, 70, 1280, 1024, 7905, 224, 32, 28, 8, 160, 8, 0,
		FB_VMODE_NONINTERLACED },

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	/* 1600x1200 @ 60Hz, 75.00 kHz hsync */
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	{ NULL, 60, 1600, 1200, 6172, 304, 64, 46, 1, 192, 3,
		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
		FB_VMODE_NONINTERLACED },

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	/* 1152x864 @ 84 Hz, 76.0 kHz hsync */
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	{ NULL, 84, 1152, 864, 7407, 184, 312, 32, 0, 128, 12, 0,
		FB_VMODE_NONINTERLACED },

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	/* 1280x1024 @ 74 Hz, 78.85 kHz hsync */
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	{ NULL, 74, 1280, 1024, 7407, 256, 32, 34, 3, 144, 3, 0,
		FB_VMODE_NONINTERLACED },

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	/* 1024x768 @ 100Hz, 80.21 kHz hsync */
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	{ NULL, 100, 1024, 768, 8658, 192, 32, 21, 3, 192, 10, 0,
		FB_VMODE_NONINTERLACED },

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	/* 1280x1024 @ 76 Hz, 81.13 kHz hsync */
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	{ NULL, 76, 1280, 1024, 7407, 248, 32, 34, 3, 104, 3, 0,
		FB_VMODE_NONINTERLACED },

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	/* 1600x1200 @ 70 Hz, 87.50 kHz hsync */
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	{ NULL, 70, 1600, 1200, 5291, 304, 64, 46, 1, 192, 3, 0,
		FB_VMODE_NONINTERLACED },

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	/* 1152x864 @ 100 Hz, 89.62 kHz hsync */
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	{ NULL, 100, 1152, 864, 7264, 224, 32, 17, 2, 128, 19, 0,
		FB_VMODE_NONINTERLACED },

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	/* 1280x1024 @ 85 Hz, 91.15 kHz hsync */
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	{ NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3,
		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
		FB_VMODE_NONINTERLACED },

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	/* 1600x1200 @ 75 Hz, 93.75 kHz hsync */
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	{ NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3,
		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
		FB_VMODE_NONINTERLACED },

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	/* 1680x1050 @ 60 Hz, 65.191 kHz hsync */
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	{ NULL, 60, 1680, 1050, 6848, 280, 104, 30, 3, 176, 6,
		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
		FB_VMODE_NONINTERLACED },

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	/* 1600x1200 @ 85 Hz, 105.77 kHz hsync */
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	{ NULL, 85, 1600, 1200, 4545, 272, 16, 37, 4, 192, 3,
		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
		FB_VMODE_NONINTERLACED },

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	/* 1280x1024 @ 100 Hz, 107.16 kHz hsync */
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	{ NULL, 100, 1280, 1024, 5502, 256, 32, 26, 7, 128, 15, 0,
		FB_VMODE_NONINTERLACED },

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	/* 1800x1440 @ 64Hz, 96.15 kHz hsync  */
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	{ NULL, 64, 1800, 1440, 4347, 304, 96, 46, 1, 192, 3,
		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
		FB_VMODE_NONINTERLACED },

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	/* 1800x1440 @ 70Hz, 104.52 kHz hsync  */
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	{ NULL, 70, 1800, 1440, 4000, 304, 96, 46, 1, 192, 3,
		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
		FB_VMODE_NONINTERLACED },

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	/* 512x384 @ 78 Hz, 31.50 kHz hsync */
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	{ NULL, 78, 512, 384, 49603, 48, 16, 16, 1, 64, 3, 0,
		FB_VMODE_NONINTERLACED },

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	/* 512x384 @ 85 Hz, 34.38 kHz hsync */
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	{ NULL, 85, 512, 384, 45454, 48, 16, 16, 1, 64, 3, 0,
		FB_VMODE_NONINTERLACED },

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	/* 320x200 @ 70 Hz, 31.5 kHz hsync, 8:5 aspect ratio */
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	{ NULL, 70, 320, 200, 79440, 16, 16, 20, 4, 48, 1, 0,
		FB_VMODE_DOUBLE },

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	/* 320x240 @ 60 Hz, 31.5 kHz hsync, 4:3 aspect ratio */
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	{ NULL, 60, 320, 240, 79440, 16, 16, 16, 5, 48, 1, 0,
		FB_VMODE_DOUBLE },

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	/* 320x240 @ 72 Hz, 36.5 kHz hsync */
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	{ NULL, 72, 320, 240, 63492, 16, 16, 16, 4, 48, 2, 0,
		FB_VMODE_DOUBLE },

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	/* 400x300 @ 56 Hz, 35.2 kHz hsync, 4:3 aspect ratio */
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	{ NULL, 56, 400, 300, 55555, 64, 16, 10, 1, 32, 1, 0,
		FB_VMODE_DOUBLE },

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	/* 400x300 @ 60 Hz, 37.8 kHz hsync */
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	{ NULL, 60, 400, 300, 50000, 48, 16, 11, 1, 64, 2, 0,
		FB_VMODE_DOUBLE },

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	/* 400x300 @ 72 Hz, 48.0 kHz hsync */
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	{ NULL, 72, 400, 300, 40000, 32, 24, 11, 19, 64, 3,	0,
		FB_VMODE_DOUBLE },

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	/* 480x300 @ 56 Hz, 35.2 kHz hsync, 8:5 aspect ratio */
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	{ NULL, 56, 480, 300, 46176, 80, 16, 10, 1, 40, 1, 0,
		FB_VMODE_DOUBLE },

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	/* 480x300 @ 60 Hz, 37.8 kHz hsync */
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	{ NULL, 60, 480, 300, 41858, 56, 16, 11, 1, 80, 2, 0,
		FB_VMODE_DOUBLE },

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	/* 480x300 @ 63 Hz, 39.6 kHz hsync */
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	{ NULL, 63, 480, 300, 40000, 56, 16, 11, 1, 80, 2, 0,
		FB_VMODE_DOUBLE },

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	/* 480x300 @ 72 Hz, 48.0 kHz hsync */
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	{ NULL, 72, 480, 300, 33386, 40, 24, 11, 19, 80, 3, 0,
		FB_VMODE_DOUBLE },

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	/* 1920x1200 @ 60 Hz, 74.5 Khz hsync */
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	{ NULL, 60, 1920, 1200, 5177, 128, 336, 1, 38, 208, 3,
		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
		FB_VMODE_NONINTERLACED },

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	/* 1152x768, 60 Hz, PowerBook G4 Titanium I and II */
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	{ NULL, 60, 1152, 768, 14047, 158, 26, 29, 3, 136, 6,
		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
		FB_VMODE_NONINTERLACED },

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	/* 1366x768, 60 Hz, 47.403 kHz hsync, WXGA 16:9 aspect ratio */
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	{ NULL, 60, 1366, 768, 13806, 120, 10, 14, 3, 32, 5, 0,
		FB_VMODE_NONINTERLACED },

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	/* 1280x800, 60 Hz, 47.403 kHz hsync, WXGA 16:10 aspect ratio */
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	{ NULL, 60, 1280, 800, 12048, 200, 64, 24, 1, 136, 3, 0,
		FB_VMODE_NONINTERLACED },

	/* 720x576i @ 50 Hz, 15.625 kHz hsync (PAL RGB) */
	{ NULL, 50, 720, 576, 74074, 64, 16, 39, 5, 64, 5, 0,
		FB_VMODE_INTERLACED },

	/* 800x520i @ 50 Hz, 15.625 kHz hsync (PAL RGB) */
	{ NULL, 50, 800, 520, 58823, 144, 64, 72, 28, 80, 5, 0,
		FB_VMODE_INTERLACED },

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	/* 864x480 @ 60 Hz, 35.15 kHz hsync */
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	{ NULL, 60, 864, 480, 27777, 1, 1, 1, 1, 0, 0,
		0, FB_VMODE_NONINTERLACED },
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};

#ifdef CONFIG_FB_MODE_HELPERS
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const struct fb_videomode cea_modes[65] = {
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	/* #1: 640x480p@59.94/60Hz */
	[1] = {
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		NULL, 60, 640, 480, 39722, 48, 16, 33, 10, 96, 2, 0,
		FB_VMODE_NONINTERLACED, 0,
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	},
	/* #3: 720x480p@59.94/60Hz */
	[3] = {
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		NULL, 60, 720, 480, 37037, 60, 16, 30, 9, 62, 6, 0,
		FB_VMODE_NONINTERLACED, 0,
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	},
	/* #5: 1920x1080i@59.94/60Hz */
	[5] = {
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		NULL, 60, 1920, 1080, 13763, 148, 88, 15, 2, 44, 5,
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		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
		FB_VMODE_INTERLACED, 0,
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	},
	/* #7: 720(1440)x480iH@59.94/60Hz */
	[7] = {
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		NULL, 60, 1440, 480, 18554/*37108*/, 114, 38, 15, 4, 124, 3, 0,
		FB_VMODE_INTERLACED, 0,
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	},
	/* #9: 720(1440)x240pH@59.94/60Hz */
	[9] = {
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		NULL, 60, 1440, 240, 18554, 114, 38, 16, 4, 124, 3, 0,
		FB_VMODE_NONINTERLACED, 0,
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	},
	/* #18: 720x576pH@50Hz */
	[18] = {
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		NULL, 50, 720, 576, 37037, 68, 12, 39, 5, 64, 5, 0,
		FB_VMODE_NONINTERLACED, 0,
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	},
	/* #19: 1280x720p@50Hz */
	[19] = {
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		NULL, 50, 1280, 720, 13468, 220, 440, 20, 5, 40, 5,
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		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
		FB_VMODE_NONINTERLACED, 0,
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	},
	/* #20: 1920x1080i@50Hz */
	[20] = {
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		NULL, 50, 1920, 1080, 13480, 148, 528, 15, 5, 528, 5,
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		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
		FB_VMODE_INTERLACED, 0,
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	},
	/* #32: 1920x1080p@23.98/24Hz */
	[32] = {
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		NULL, 24, 1920, 1080, 13468, 148, 638, 36, 4, 44, 5,
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		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
		FB_VMODE_NONINTERLACED, 0,
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	},
	/* #35: (2880)x480p4x@59.94/60Hz */
	[35] = {
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		NULL, 60, 2880, 480, 9250, 240, 64, 30, 9, 248, 6, 0,
		FB_VMODE_NONINTERLACED, 0,
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	},
};

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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 */
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	{ NULL, 60, 640, 480, 39682,  48, 16, 33, 10, 96, 2,
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	  0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
	/* 4 640x480-72 VESA */
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	{ NULL, 72, 640, 480, 31746, 128, 24, 29, 9, 40, 2,
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	  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 */
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	{ NULL, 43, 1024, 768, 22271, 56, 8, 41, 0, 176, 8,
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	  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 */
410
	{ NULL, 75, 1152, 864, 9259, 256, 64, 32, 1, 128, 3,
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	  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 */
446
	{ NULL, 75, 1600, 1200, 4938, 304, 64, 46, 1, 192, 3,
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	  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 */
469
	{ NULL, 75, 1920, 1440, 3367, 352, 144, 56, 1, 224, 3,
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	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497
	/* 34 1920x1200-60 RB VESA */
	{ NULL, 60, 1920, 1200, 6493, 80, 48, 26, 3, 32, 6,
	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
	/* 35 1920x1200-60 VESA */
	{ NULL, 60, 1920, 1200, 5174, 336, 136, 36, 3, 200, 6,
	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
	/* 36 1920x1200-75 VESA */
	{ NULL, 75, 1920, 1200, 4077, 344, 136, 46, 3, 208, 6,
	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
	/* 37 1920x1200-85 VESA */
	{ NULL, 85, 1920, 1200, 3555, 352, 144, 53, 3, 208, 6,
	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
	/* 38 2560x1600-60 RB VESA */
	{ NULL, 60, 2560, 1600, 3724, 80, 48, 37, 3, 32, 6,
	  FB_SYNC_HOR_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
	/* 39 2560x1600-60 VESA */
	{ NULL, 60, 2560, 1600, 2869, 472, 192, 49, 3, 280, 6,
	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
	/* 40 2560x1600-75 VESA */
	{ NULL, 75, 2560, 1600, 2256, 488, 208, 63, 3, 280, 6,
	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
	/* 41 2560x1600-85 VESA */
	{ NULL, 85, 2560, 1600, 1979, 488, 208, 73, 3, 280, 6,
	  FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
	/* 42 2560x1600-120 RB VESA */
	{ NULL, 120, 2560, 1600, 1809, 80, 48, 85, 3, 32, 6,
	  FB_SYNC_HOR_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
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};
EXPORT_SYMBOL(vesa_modes);
500 501 502 503 504 505 506 507 508 509 510 511 512 513

const struct dmt_videomode dmt_modes[DMT_SIZE] = {
	{ 0x01, 0x0000, 0x000000, &vesa_modes[0] },
	{ 0x02, 0x3119, 0x000000, &vesa_modes[1] },
	{ 0x03, 0x0000, 0x000000, &vesa_modes[2] },
	{ 0x04, 0x3140, 0x000000, &vesa_modes[3] },
	{ 0x05, 0x314c, 0x000000, &vesa_modes[4] },
	{ 0x06, 0x314f, 0x000000, &vesa_modes[5] },
	{ 0x07, 0x3159, 0x000000, &vesa_modes[6] },
	{ 0x08, 0x0000, 0x000000, &vesa_modes[7] },
	{ 0x09, 0x4540, 0x000000, &vesa_modes[8] },
	{ 0x0a, 0x454c, 0x000000, &vesa_modes[9] },
	{ 0x0b, 0x454f, 0x000000, &vesa_modes[10] },
	{ 0x0c, 0x4559, 0x000000, &vesa_modes[11] },
514 515
	{ 0x0d, 0x0000, 0x000000, NULL },
	{ 0x0e, 0x0000, 0x000000, NULL },
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	{ 0x0f, 0x0000, 0x000000, &vesa_modes[12] },
	{ 0x10, 0x6140, 0x000000, &vesa_modes[13] },
	{ 0x11, 0x614a, 0x000000, &vesa_modes[14] },
	{ 0x12, 0x614f, 0x000000, &vesa_modes[15] },
	{ 0x13, 0x6159, 0x000000, &vesa_modes[16] },
521
	{ 0x14, 0x0000, 0x000000, NULL },
522
	{ 0x15, 0x714f, 0x000000, &vesa_modes[17] },
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	{ 0x16, 0x0000, 0x7f1c21, NULL },
	{ 0x17, 0x0000, 0x7f1c28, NULL },
	{ 0x18, 0x0000, 0x7f1c44, NULL },
	{ 0x19, 0x0000, 0x7f1c62, NULL },
	{ 0x1a, 0x0000, 0x000000, NULL },
	{ 0x1b, 0x0000, 0x8f1821, NULL },
	{ 0x1c, 0x8100, 0x8f1828, NULL },
	{ 0x1d, 0x810f, 0x8f1844, NULL },
	{ 0x1e, 0x8119, 0x8f1862, NULL },
	{ 0x1f, 0x0000, 0x000000, NULL },
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	{ 0x20, 0x8140, 0x000000, &vesa_modes[18] },
	{ 0x21, 0x8159, 0x000000, &vesa_modes[19] },
535
	{ 0x22, 0x0000, 0x000000, NULL },
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	{ 0x23, 0x8180, 0x000000, &vesa_modes[20] },
	{ 0x24, 0x818f, 0x000000, &vesa_modes[21] },
	{ 0x25, 0x8199, 0x000000, &vesa_modes[22] },
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	{ 0x26, 0x0000, 0x000000, NULL },
	{ 0x27, 0x0000, 0x000000, NULL },
	{ 0x28, 0x0000, 0x000000, NULL },
	{ 0x29, 0x0000, 0x0c2021, NULL },
	{ 0x2a, 0x9040, 0x0c2028, NULL },
	{ 0x2b, 0x904f, 0x0c2044, NULL },
	{ 0x2c, 0x9059, 0x0c2062, NULL },
	{ 0x2d, 0x0000, 0x000000, NULL },
	{ 0x2e, 0x9500, 0xc11821, NULL },
	{ 0x2f, 0x9500, 0xc11828, NULL },
	{ 0x30, 0x950f, 0xc11844, NULL },
	{ 0x31, 0x9519, 0xc11868, NULL },
	{ 0x32, 0x0000, 0x000000, NULL },
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	{ 0x33, 0xa940, 0x000000, &vesa_modes[23] },
	{ 0x34, 0xa945, 0x000000, &vesa_modes[24] },
	{ 0x35, 0xa94a, 0x000000, &vesa_modes[25] },
	{ 0x36, 0xa94f, 0x000000, &vesa_modes[26] },
	{ 0x37, 0xa959, 0x000000, &vesa_modes[27] },
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	{ 0x38, 0x0000, 0x000000, NULL },
	{ 0x39, 0x0000, 0x0c2821, NULL },
	{ 0x3a, 0xb300, 0x0c2828, NULL },
	{ 0x3b, 0xb30f, 0x0c2844, NULL },
	{ 0x3c, 0xb319, 0x0c2868, NULL },
	{ 0x3d, 0x0000, 0x000000, NULL },
563 564
	{ 0x3e, 0xc140, 0x000000, &vesa_modes[28] },
	{ 0x3f, 0xc14f, 0x000000, &vesa_modes[29] },
565
	{ 0x40, 0x0000, 0x000000, NULL},
566 567
	{ 0x41, 0xc940, 0x000000, &vesa_modes[30] },
	{ 0x42, 0xc94f, 0x000000, &vesa_modes[31] },
568
	{ 0x43, 0x0000, 0x000000, NULL },
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	{ 0x44, 0x0000, 0x572821, &vesa_modes[34] },
	{ 0x45, 0xd100, 0x572828, &vesa_modes[35] },
	{ 0x46, 0xd10f, 0x572844, &vesa_modes[36] },
	{ 0x47, 0xd119, 0x572862, &vesa_modes[37] },
573
	{ 0x48, 0x0000, 0x000000, NULL },
574 575
	{ 0x49, 0xd140, 0x000000, &vesa_modes[32] },
	{ 0x4a, 0xd14f, 0x000000, &vesa_modes[33] },
576
	{ 0x4b, 0x0000, 0x000000, NULL },
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	{ 0x4c, 0x0000, 0x1f3821, &vesa_modes[38] },
	{ 0x4d, 0x0000, 0x1f3828, &vesa_modes[39] },
	{ 0x4e, 0x0000, 0x1f3844, &vesa_modes[40] },
	{ 0x4f, 0x0000, 0x1f3862, &vesa_modes[41] },
	{ 0x50, 0x0000, 0x000000, &vesa_modes[42] },
};
EXPORT_SYMBOL(dmt_modes);
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#endif /* CONFIG_FB_MODE_HELPERS */

/**
 *	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)
{
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	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;
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}

/**
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 *     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
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 *
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 *     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.
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 *
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 *     Valid mode specifiers for @mode_option:
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 *
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 *     <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m] or
 *     <name>[-<bpp>][@<refresh>]
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 *
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 *     with <xres>, <yres>, <bpp> and <refresh> decimal numbers and
 *     <name> a string.
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 *
653 654 655 656 657 658 659 660 661 662
 *      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.
 *
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 *     NOTE: The passed struct @var is _not_ cleared!  This allows you
 *     to supply values for e.g. the grayscale and accel_flags fields.
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 *
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 *     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.
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 *
 */

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)
{
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	int i;
679

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	/* Set up defaults */
	if (!db) {
		db = modedb;
		dbsize = ARRAY_SIZE(modedb);
	}
685

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	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;
		int margins = 0;
		u32 best, diff, tdiff;

		for (i = namelen-1; i >= 0; i--) {
			switch (name[i]) {
			case '@':
				namelen = i;
				if (!refresh_specified && !bpp_specified &&
				    !yres_specified) {
					refresh = simple_strtol(&name[i+1], NULL,
								10);
					refresh_specified = 1;
					if (cvt || rb)
						cvt = 0;
				} else
					goto done;
				break;
			case '-':
				namelen = i;
				if (!bpp_specified && !yres_specified) {
					bpp = simple_strtol(&name[i+1], NULL,
							    10);
					bpp_specified = 1;
					if (cvt || rb)
						cvt = 0;
				} else
					goto done;
				break;
			case 'x':
				if (!yres_specified) {
					yres = simple_strtol(&name[i+1], NULL,
							     10);
					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 = simple_strtol(name, NULL, 10);
			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" : "");

			memset(&cvt_mode, 0, sizeof(cvt_mode));
			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;
			}
790

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			DPRINTK("CVT mode invalid, getting mode from database\n");
		}
793

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		DPRINTK("Trying specified video mode%s %ix%i\n",
			refresh_specified ? "" : " (ignoring refresh rate)",
			xres, yres);
797

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		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;
			}
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		}

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		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;

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				if (abs(db[i].refresh - refresh) < diff) {
					diff = abs(db[i].refresh - refresh);
					best = i;
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				}
			}
		}
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		if (best != -1) {
			fb_try_mode(var, info, &db[best], bpp);
			return (refresh_specified) ? 2 : 1;
		}
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		diff = 2 * (xres + yres);
		best = -1;
		DPRINTK("Trying best-fit modes\n");
		for (i = 0; i < dbsize; i++) {
			DPRINTK("Trying %ix%i\n", db[i].xres, db[i].yres);
			if (!fb_try_mode(var, info, &db[i], bpp)) {
				tdiff = abs(db[i].xres - xres) +
					abs(db[i].yres - yres);

				/*
				 * Penalize modes with resolutions smaller
				 * than requested.
				 */
				if (xres > db[i].xres || yres > db[i].yres)
					tdiff += xres + yres;

				if (diff > tdiff) {
					diff = tdiff;
					best = i;
				}
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			}
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		}
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		if (best != -1) {
			fb_try_mode(var, info, &db[best], bpp);
			return 5;
		}
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	}

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	DPRINTK("Trying default video mode\n");
	if (!fb_try_mode(var, info, default_mode, default_bpp))
		return 3;
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	DPRINTK("Trying all modes\n");
	for (i = 0; i < dbsize; i++)
		if (!fb_try_mode(var, info, &db[i], default_bpp))
			return 4;
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	DPRINTK("No valid mode found\n");
	return 0;
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}

/**
 * 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,
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			 const struct fb_var_screeninfo *var)
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{
	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;
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	mode->refresh = 0;

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	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,
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			 const struct fb_videomode *mode)
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{
	var->xres = mode->xres;
	var->yres = mode->yres;
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	var->xres_virtual = mode->xres;
	var->yres_virtual = mode->yres;
	var->xoffset = 0;
	var->yoffset = 0;
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	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;
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	var->hsync_len = mode->hsync_len;
	var->vsync_len = mode->vsync_len;
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	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
 */
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int fb_mode_is_equal(const struct fb_videomode *mode1,
		     const struct fb_videomode *mode2)
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{
	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
 */
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const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var,
					     struct list_head *head)
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{
	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;
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			} else if (diff == d && best &&
				   mode->refresh > best->refresh)
				best = mode;
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		}
	}
	return best;
}

/**
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 * fb_find_nearest_mode - find closest videomode
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 *
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 * @mode: pointer to struct fb_videomode
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 * @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
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 * the closest refresh rate.
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 */
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const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode,
					        struct list_head *head)
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{
	struct list_head *pos;
	struct fb_modelist *modelist;
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	struct fb_videomode *cmode, *best = NULL;
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	u32 diff = -1, diff_refresh = -1;

	list_for_each(pos, head) {
		u32 d;

		modelist = list_entry(pos, struct fb_modelist, list);
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		cmode = &modelist->mode;
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		d = abs(cmode->xres - mode->xres) +
			abs(cmode->yres - mode->yres);
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		if (diff > d) {
			diff = d;
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			diff_refresh = abs(cmode->refresh - mode->refresh);
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			best = cmode;
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		} else if (diff == d) {
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			d = abs(cmode->refresh - mode->refresh);
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			if (diff_refresh > d) {
				diff_refresh = d;
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				best = cmode;
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			}
		}
	}

	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
 */
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const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var,
					 struct list_head *head)
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{
	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;
}

/**
1083
 * fb_add_videomode - adds videomode entry to modelist
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 * @mode: videomode to add
 * @head: struct list_head of modelist
 *
 * NOTES:
 * Will only add unmatched mode entries
 */
1090
int fb_add_videomode(const struct fb_videomode *mode, struct list_head *head)
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{
	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;
}

/**
1118
 * fb_delete_videomode - removed videomode entry from modelist
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 * @mode: videomode to remove
 * @head: struct list_head of modelist
 *
 * NOTES:
 * Will remove all matching mode entries
 */
1125 1126
void fb_delete_videomode(const struct fb_videomode *mode,
			 struct list_head *head)
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{
	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);
		}
	}
}

/**
1143
 * fb_destroy_modelist - destroy modelist
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 * @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);
	}
}
1155
EXPORT_SYMBOL_GPL(fb_destroy_modelist);
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/**
1158
 * fb_videomode_to_modelist - convert mode array to mode list
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 * @modedb: array of struct fb_videomode
 * @num: number of entries in array
 * @head: struct list_head of modelist
 */
1163
void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num,
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			      struct list_head *head)
{
	int i;

	INIT_LIST_HEAD(head);

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

1176 1177
const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs,
					        struct list_head *head)
1178 1179 1180
{
	struct list_head *pos;
	struct fb_modelist *modelist;
1181
	const struct fb_videomode *m, *m1 = NULL, *md = NULL, *best = NULL;
1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235
	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);

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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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EXPORT_SYMBOL(fb_find_mode_cvt);