FB_GET_HBLANK_BY_DCLK
Section: ()
Updated: 06 October 2005
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NAME
fb_get_hblank_by_dclk - get horizontal blank time given pixelclock
SYNOPSIS
"SYNOPSIS"
u32 fb_get_hblank_by_dclk (u32 dclk, u32 xres);
ARGUMENTS
- dclk
-
pixelclock in Hz
- 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 * h_period)
WHERE
h_period = SQRT(100 - C + (0.4 * xres * M)/dclk) + C - 100
-----------------------------------------------
2 * M
M = 300;
C = 30;
Index
- NAME
-
- SYNOPSIS
-
- ARGUMENTS
-
- DESCRIPTION
-
- WHERE
-
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Time: 06:20:48 GMT, October 06, 2005