[Xorg-driver-geode] Tearing Effects in Videos

[John Yoder]

Thanks for the response. I have another question, do you see this in a
Xorg window at the videos standard resolution also? 

I didn't see anything major wrong with your configuration, I think that
is good. I believe this is happening within the XVOverlay of the driver.
I don't believe this is a vsync issue as the hardware doesn't quite work
that way. I believe the overlay is drawing (blitting) what it has in the
video overlay framebuffer. The Overlay Engine is responsible for the
YUV->RGB conversion and also scaling. As I recall, in the driver there
is some calculations for video starting point in memory, etc. and this
may be a bit off. This actually happens before the hardware scales so it
may have been there for some time and not seen until the video is
scaled. 

I need to duplicate this and I'll get some hardware to do that this
week. Until I duplicate this I am not certain what is happening. I'll
keep you posted on what I find out.

Best Regards,

John Yoder


On Sun, 2009-03-15 at 18:41 +0100, Marius Selach wrote:
> Hi John,
> 
> Yes, Im using mplayer in fullscreen mode. Im quite sure that the
> problem exists because of the lack of vsync, because when I change the
> refreshrate (the LCD is connected via the VGA connector) the tearing
> patterns begin to change and it „seams“ that there is less tearing in
> the picture.
> 
> The command Im using for mplayer is:
> 
> > mplayer -cache 8192 -monitoraspect 16:9 -autoq 6 -vf pp -fs -zoom -quite -vo xv %s
> 
> I have attached the other files you wanted.
> 
> 
> 
> Best Regards
> 
> Marius Selach
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