On Thu, 30 Apr 2009 17:48:08 +0200 Michel Dänzer <mic...@daenzer.net> wrote:
> On Thu, 2009-04-30 at 08:39 -0700, Jesse Barnes wrote: > > On Thu, 30 Apr 2009 08:08:36 +0200 > > Michel Dänzer <mic...@daenzer.net> wrote: > > > > > On Wed, 2009-04-29 at 18:02 -0700, Jesse Barnes wrote: > > > > On Wed, 29 Apr 2009 15:09:33 -0700 > > > > Jesse Barnes <jbar...@virtuousgeek.org> wrote: > > > > > I'm still working through mutlihead issues on the kernel > > > > > side; the flip waits should wait for *both* vblank events > > > > > before completing the flip. But other than that, I'm pretty > > > > > happy with things. > > > > > > > > This incremental set fixes up the multihead handling and adds > > > > swap interval support as a bonus. It's nice to see flipping & > > > > no tearing on two heads at once! > > > > > > Is there a mechanism for choosing the CRTC to sync to in ambiguous > > > cases? E.g. either a driconf option (allowing per application > > > configuration) or a RandR property (allowing global configuration) > > > would be nice I think. > > > > The kernel is supposed to handle it and reject flips on disabled > > CRTCs so I was hoping it wouldn't be necessary. > > That's not an ambiguous case. Ambiguous cases are when parts of the > window are visible on both CRTCs. Ah ok, yeah I'd expect that to be up to the 2D driver as well. The display manager will get a swapbuffers request for a given drawable, and it's up to the 2D driver to figure out what to do with it. If the buffer spans the whole X screen, this code queues a flip in the kernel on every CRTC that has that buffer. If the request is just for a window, the driver could queue blits on each CRTC separately, or do scanline waits on one or each CRTC during the copy operation. But in this code we just punt on anything non-fullscreen and let CopyRegion handle it (which currently doesn't sync). The best solution would probably be to add code to CopyRegion that looks like what we have in intelWindowMoved, picking the "best" CRTC to sync on (though maybe with an override option like you suggest). -- Jesse Barnes, Intel Open Source Technology Center ------------------------------------------------------------------------------ Register Now & Save for Velocity, the Web Performance & Operations Conference from O'Reilly Media. Velocity features a full day of expert-led, hands-on workshops and two days of sessions from industry leaders in dedicated Performance & Operations tracks. Use code vel09scf and Save an extra 15% before 5/3. http://p.sf.net/sfu/velocityconf -- _______________________________________________ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
