centos man page for fb_find_mode

FB_FIND_MODE(9) 					       Frame Buffer Library						   FB_FIND_MODE(9)

NAME
       fb_find_mode - finds a valid video mode

SYNOPSIS
       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);

ARGUMENTS
       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

DESCRIPTION
       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>[M][R][-<bpp>][@<refresh>][i][m] or <name>[-<bpp>][@<refresh>]

       with <xres>, <yres>, <bpp> and <refresh> decimal numbers and <name> a string.

       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-860m - Reduced blank with margins at 60Hz.

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.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							   FB_FIND_MODE(9)