REGISTER_FRAMEBUFFER(9) Frame Buffer Library REGISTER_FRAMEBUFFER(9)NAME
register_framebuffer - registers a frame buffer device
SYNOPSIS
int register_framebuffer(struct fb_info * fb_info);
ARGUMENTS
fb_info
frame buffer info structure
DESCRIPTION
Registers a frame buffer device fb_info.
Returns negative errno on error, or zero for success.
COPYRIGHT Kernel Hackers Manual 2.6. July 2010 REGISTER_FRAMEBUFFER(9)
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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 2.6. July 2010 FB_FIND_MODE(9)
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