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

info

mode_option

db

dbsize

default_mode

default_bpp

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¶