If you are applying a patch, and needs some testing done, I'm willing to
volunteer for that part....

On Sun, 2002-03-31 at 22:43, Egbert Eich wrote:
> Mark Vojkovich writes:
>  > 
>  >    Looking at the code for the siliconmotion driver in the tree, I'm 
>  > not surprised.  It looks like the driver is polling until the retrace
>  > everytime it has to put a frame.  I would expect that to eat up more
>  > CPU than just doing all the video in software.   You should probably
>  > try it without Xv, if that's being used now.  Or somebody should fix
>  > the drivers.
>  > 
> 
> OK, I will look into this next week.
> 
> I guess this retrace waiting was done to prevent shearing.
> Only very few chipsets support some kind of double buffering
> with automatic buffer switching on retrace. On all others
> we need to poll the chip to detect a retrace.
> 
> Mark, do you have any new idea how to solve this problem?
> I guess a solution would be to have some limited kernel
> support to handle interrupts.
> 
> Regards,
>       Egbert.
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