Multi-monitor (xinerama/mergefb) support in RandR

Eric Anholt eric at
Thu Jun 29 04:11:57 PDT 2006

On Thu, 2006-06-29 at 20:34 +1000, Benjamin Herrenschmidt wrote:
> > No, EXA really shouldn't need to know anything about scanout buffers --
> > they're just another scratch pixmap whose pointer happens to point at
> > framebuffer.  If your driver wants to relocate where the screen is in
> > memory, I think it would just have to get the screen pixmap and modify
> > the pointer and pitch to the new location.
> Well.. they also need to be pinned...

Yes, and we've already got locked allocations, except that they get
kicked out at VT switch.  Which is why I said for some DRI drivers (that
don't yet have a mechanism to announce a new FB location), it wouldn't
quite be doable yet.

Eric Anholt                             anholt at
eric at                         eric.anholt at
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