Re: [PATCH 1/9] drm/i915: Don't set the fence number in DPFC_CTL on SNB

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On Thu, Nov 21, 2013 at 09:29:45PM +0200, ville.syrjala@xxxxxxxxxxxxxxx wrote:
> From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> 
> SNB has another register where the actual FBC CPU fence number is
> stored. The documenation explicitly states that the fence number
> in DPFC_CTL must be 0 on SNB. And in fact when it's not zero,
> the GTT tracking simply doesn't work.
> 
> Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Reviewed-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre
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