From: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date: Thu, 5 Dec 2013 13:51:41 +0000 (+0200)
Subject: drm/i915: Avoid underruns when disabling sprites
X-Git-Tag: v3.14-rc1~47^2~16^2~38
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1bd09ec7ad314313f15db733c7e9cb2225d95453;p=pandora-kernel.git

drm/i915: Avoid underruns when disabling sprites

As the watermark registers aren't double bufferd, clearing the
watermarks immediately after writing the sprite registers can be
hazardous.

Until we have something better, add a wait for vblank between the
two steps to make sure the sprite no longer needs the watermark
levels before we clear them.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---

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