[PATCH] Notify DRI when crtc regions change

[Adam Jackson]

On Fri, 2008-11-14 at 12:50 -0800, Keith Packard wrote:
> Drivers that care about crtc positions on the screen to ensure that vblank
> works correctly need to be notified when crtcs are changed.
> 
> Provide a hook in the mode setting code that is invoked whenever any
> configuration is done to the screen.
> 
> Use this new hook in the DRI code so that DRI clients are notified and
> receive updated information.

I'm not totally convinced that DisableUnusedFunctions is the right place
for this to get called, but it's merely overkill.  Ack.

- ajax
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