[Intel-gfx] [PATCH 2/2] drm/i915: Use RCS flips on Ivybridge+

[Ville Syrjälä]

On Wed, Sep 04, 2013 at 11:41:57AM +0200, Daniel Vetter wrote:
> On Wed, Sep 4, 2013 at 11:28 AM, Lee, Chon Ming <chon.ming.lee at intel.com> wrote:
> > This patch causes VLV hang, look like ring buffer lockup.
> >
> > This is the message.
> > [drm] stuck on render ring
> >
> > I haven't look at the bspec for the different between VLV and Ivybridge on this
> > yet.  Just see anyone have any clue why this might fail in VLV.
> 
> I guess there's no DERRMR register on vlv? If that's the case I think
> we just need to disable rcs flips on vlv.

There's the DPFLIPSTAT register. But my understanding was that it only
affects flip done signalling for MI_WAIT stuff. Worth a shot maybe
anyway.

-- 
Ville Syrjälä
Intel OTC