From: Paulo Zanoni <paulo.r.zanoni@intel.com>
Date: Fri, 20 Sep 2013 19:21:19 +0000 (-0300)
Subject: drm/i915: implement the Haswell mode set sequence workaround
X-Git-Tag: v3.13-rc1~76^2~80^2~12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e4916946b8f28dfe2c79f613cb076a5de58d79c2;p=pandora-kernel.git

drm/i915: implement the Haswell mode set sequence workaround

This workaround is described in the mode set sequence documentation.
When enabling planes for the second pipe, we need to wait for 2
vblanks on the first pipe. This should solve "a flash of screen
corruption if planes are enabled on second/third pipe during the time
that big FIFO mode is exiting". Watermarks are fun :)

v2: Save indentation levels

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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