From aacef09b59e99d9e919ede74d107d5d7f3721432 Mon Sep 17 00:00:00 2001
From: Zhenyu Wang <zhenyuw@linux.intel.com>
Date: Tue, 9 Feb 2010 09:46:20 +0800
Subject: [PATCH] drm/i915: fix pipe source image setting in flip command

The MI_DISPLAY_FLIP command needs to be set the same pipe
source image like in pipe source register, e.g source image
size minus one. This fixes screen corrupt issue on Ironlake.

Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
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