| /* |
| * 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(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args) |
| #else |
| #define DPRINTK(fmt, args...) |
| #endif |
| |
| |
| const char *global_mode_option = NULL; |
| |
| |
| /* |
| * Standard video mode definitions (taken from XFree86) |
| */ |
| |
| #define DEFAULT_MODEDB_INDEX 0 |
| |
| static const struct fb_videomode modedb[] __initdata = { |
| { |
| /* 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 |
| }, { |
| /* 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 |
| }, |
| }; |
| |
| |
| static int __init 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. |
| * |
| */ |
| |
| int __fb_try_mode(struct fb_var_screeninfo *var, struct fb_info *info, |
| const struct fb_videomode *mode, unsigned int bpp) |
| { |
| int err = 1; |
| |
| 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 __init 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, j; |
| |
| /* 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; |
| |
| 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: |
| for (i = refresh_specified; i >= 0; i--) { |
| DPRINTK("Trying specified video mode%s\n", |
| i ? "" : " (ignoring refresh rate)"); |
| for (j = 0; j < dbsize; j++) |
| if ((name_matches(db[j], name, namelen) || |
| (res_specified && res_matches(db[j], xres, yres))) && |
| (!i || db[j].refresh == refresh) && |
| __fb_try_mode(var, info, &db[j], bpp)) |
| return 2-i; |
| } |
| } |
| |
| 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; |
| } |
| |
| EXPORT_SYMBOL(__fb_try_mode); |