From 48fe4691ae639e60fda37faf06dccdff60245149 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@linux.intel.com>
Date: Thu, 19 Mar 2015 17:57:13 +0200
Subject: [PATCH] drm/i915: Eliminate plane control register RMW from sprite
 code
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Replace the RMW access with explicit initialization of the entire plane
control register, as was done for primary planes in:

 commit f45651bae2ee73ae551699d481f76aa6ad92138f
 Author: Ville Syrjälä <ville.syrjala@linux.intel.com>
 Date:   Fri Aug 8 21:51:10 2014 +0300

    drm/i915: Eliminate rmw from .update_primary_plane()

The automagic primary plane disable is still doing RMWs, but that will
require more work to untangle, so leave it alone for now.

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