1FB_FIND_MODE(9)              Frame Buffer Library              FB_FIND_MODE(9)
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NAME

6       fb_find_mode - finds a valid video mode
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SYNOPSIS

9       int fb_find_mode(struct fb_var_screeninfo * var, struct fb_info * info,
10                        const char * mode_option,
11                        const struct fb_videomode * db, unsigned int dbsize,
12                        const struct fb_videomode * default_mode,
13                        unsigned int default_bpp);
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ARGUMENTS

16       var
17           frame buffer user defined part of display
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19       info
20           frame buffer info structure
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22       mode_option
23           string video mode to find
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25       db
26           video mode database
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28       dbsize
29           size of db
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31       default_mode
32           default video mode to fall back to
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34       default_bpp
35           default color depth in bits per pixel
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DESCRIPTION

38       Finds a suitable video mode, starting with the specified mode in
39       mode_option with fallback to default_mode. If default_mode fails, all
40       modes in the video mode database will be tried.
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42       Valid mode specifiers for mode_option:
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44       <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m] or
45       <name>[-<bpp>][@<refresh>]
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47       with <xres>, <yres>, <bpp> and <refresh> decimal numbers and <name> a
48       string.
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50       If ´M´ is present after yres (and before refresh/bpp if present), the
51       function will compute the timings using VESA(tm) Coordinated Video
52       Timings (CVT). If ´R´ is present after ´M´, will compute with reduced
53       blanking (for flatpanels). If ´i´ is present, compute interlaced mode.
54       If ´m´ is present, add margins equal to 1.8% of xres rounded down to 8
55       pixels, and 1.8% of yres. The char ´i´ and ´m´ must be after ´M´ and
56       ´R´. Example:
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58       1024x768MR-860m - Reduced blank with margins at 60Hz.
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NOTE

61       The passed struct var is _not_ cleared! This allows you to supply
62       values for e.g. the grayscale and accel_flags fields.
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64       Returns zero for failure, 1 if using specified mode_option, 2 if using
65       specified mode_option with an ignored refresh rate, 3 if default mode
66       is used, 4 if fall back to any valid mode.
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69Kernel Hackers Manual 2.6.         June 2019                   FB_FIND_MODE(9)
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