Re: [PATCH 2/2] drm/i915: Use RCS flips on Ivybridge+

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On Wed, Sep 04, 2013 at 05:28:22PM +0800, Lee, Chon Ming 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.

Hmm, vsync on vlv behaves like snb not ivb, so flipping may be snb as
well? Bspec confirms, MI_DISPLAY_FLIP is invalid for RCS on VLV.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre
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