FB_GET_HBLANK_BY_HFREQ
Section: ()
Updated: 06 October 2005
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NAME
fb_get_hblank_by_hfreq - get horizontal blank time given hfreq
SYNOPSIS
"SYNOPSIS"
u32 fb_get_hblank_by_hfreq (u32 hfreq, u32 xres);
ARGUMENTS
- hfreq
-
horizontal freq
- xres
-
horizontal resolution in pixels
DESCRIPTION
xres * duty_cycle
hblank = ------------------
100 - duty_cycle
duty cycle = percent of htotal assigned to inactive display
duty cycle = C - (M/Hfreq)
WHERE
C = ((offset - scale factor) * blank_scale)
-------------------------------------- + scale factor
256
M = blank_scale * gradient
Index
- NAME
-
- SYNOPSIS
-
- ARGUMENTS
-
- DESCRIPTION
-
- WHERE
-
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Time: 06:20:48 GMT, October 06, 2005