From fe27c606625299ec6237ad420e9c2f961fa3bf3d Mon Sep 17 00:00:00 2001
From: Chia-I Wu <olv@lunarg.com>
Date: Tue, 28 Jan 2014 13:29:33 +0800
Subject: [PATCH] drm/i915: enable HiZ Raw Stall Optimization on HSW
MIME-Version: 1.0
Content-Type: text/plain; charset=utf8
Content-Transfer-Encoding: 8bit

The optimization is available on Ivy Bridge and later, and is disabled by
default.  Enabling it helps certain workloads such as GLBenchmark TRex test.

No piglit regression.

v2
 - no need to save the register before suspend as init_clock_gating can
   correctly program it after resume
 - split IVB change to another commit

Signed-off-by: Chia-I Wu <olv@lunarg.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
Reading git-format-patch failed