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 3.10         June 2019                   FB_FIND_MODE(9)
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