From: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Wed, 23 May 2012 12:02:00 +0000 (+0200)
Subject: drm/i915: fix up ivb plane 3 pageflips
X-Git-Tag: v3.5-rc2~11^2~1^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cb05d8dedefa3066bf5d74ef88c6ca6cf4bd1c87;p=pandora-kernel.git

drm/i915: fix up ivb plane 3 pageflips

Or at least plug another gapping hole. Apparrently hw desingers only
moved the bit field, but did not bother ot re-enumerate the planes
when adding support for a 3rd pipe.

Discovered by i-g-t/flip_test.

This may or may not fix the reference bugzilla, because that one
smells like we have still larger fish to fry.

v2: Fixup the impossible case to catch programming errors, noticed by
Chris Wilson.

References: https://bugs.freedesktop.org/show_bug.cgi?id=50069
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Tested-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
Eugeni Dodonov <eugeni.dodonov@intel.com>
Cc: stable@vger.kernel.org
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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