[Linux-fbdev-devel] Re: Status of radeonfb in 2.5?

[Nicholas W. <nw...@ne...>]

Antonino Daplas wrote:

> Not necessarily painless...
> 
> Given timings in X modeline format (you can generate with xvidtune):
> 
> "XRESxYRES"     MHZ   XACTIVE FP_X HSYNC BP_X    YACTIVE  FP_Y  VSYNC
> BP_Y +hsync +vsync
> 
> Then timings in fb.mode:
> 
> mode "XRESxYRES MHZ"
>     # D: "MHZ, H: HorizSync kHz, V: VertRefresh Hz
>     geometry xres yres vxres vyres bpp
>     timings pixclock left right upper lower hsync vsync
>     hsync high
>     vsync high
> endmode
> 
> where:
> 
> pixclock = 1000000/MHZ
> left = BP_X - HSYNC
> right = FP_X - XACTIVE
> upper = BP_Y - VSYNC
> lower = FP_Y - YACTIVE
> hsync = HSYNC - FP_X
> vsync = VSYNC - FP_Y
> 
> What you need to concentrate on is the timings field of fb.modes. This
> also assumes that the driver actually reads the timings field.  Some
> drivers disregard those values (considers only xres and yres) then
> configure their own timings.
> 
Tony,

Thank you, this is *exactly* what I was looking for!  I never knew what 
xvidtune was really for, but this sure answers that one.

Cheers,
Nicholas