From ce17178094f368d9e3f39b2cb4303da5ed633dd4 Mon Sep 17 00:00:00 2001
From: Zou Nan hai <nanhai.zou@intel.com>
Date: Fri, 25 Jun 2010 13:40:22 +0800
Subject: [PATCH] drm/i915: Enable RC6 on Ironlake.

RC6 allows the GPU to enter a lower power state when the GPU is idle.

Signed-off-by: Zou Nan hai <nanhai.zou@intel.com>
[anholt: Fixed the !renderctx error path to actually not enable RC6.]
Signed-off-by: Eric Anholt <eric@anholt.net>
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