From 4cf0ebbd4fafbdf8e6431dbb315e5511c3efdc3b Mon Sep 17 00:00:00 2001
From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Date: Mon, 13 Jul 2015 16:30:20 +0200
Subject: [PATCH] drm/i915: Rework plane readout.

All non-primary planes get disabled during hw readout,
this reduces complexity and means not having to do some plane
visibility checks during the first commit.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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