radeon 8500 mergedfb flicker

[Alex Deucher]

On Thu, 02 Dec 2004 12:34:54 -0500, Michel Dänzer <michel at daenzer.net> wrote:
> On Wed, 2004-12-01 at 21:12 -0500, Alex Deucher wrote:
> > On Thu, 2 Dec 2004 11:05:19 +1100, Dave Airlie <airlied at gmail.com> wrote:
> > > >
> > > > Is this a bus bandwidth issue or something like that? should I give up
> > > > my dream of dual head  3d and go back to using a PCI card for the
> > > > second head?
> > >
> > > Also when I run a 3D app both screen revert to clone mode - wierd....
> >
> > turn off pageflipping.  it doesn't really work with dualhead.
> 
> I've been scratching my head over the MergedFB AdjustFrame functions but
> don't see how both CRTC offsets can end up being the same in
> radeon_cp_dispatch_flip(). Maybe the AdjustFrame wrapping is wrong wrt
> the generic DRI wrapper? Just a guess...
> 

I know I went through the same thing when I wrote mergedfb initially. 
perhaps something to do with vblanks?  what's weird is that it used to
work ok if crtc1 was at a lower offset than crtc2.  apparently that
stopped working after the dri->xorg merge.

Alex

> --
> Earthling Michel Dänzer      |     Debian (powerpc), X and DRI developer
> Libre software enthusiast    |   http://svcs.affero.net/rm.php?r=daenzer
>