[Intel-gfx] [PATCH] drm/i915: disable RC6+ on Sandy Bridge

[Jesse Barnes]

RC6+ can cause trouble, so keep it disabled (this costs us a little
power, around 20mW I think, but better safe than sorry).

Cc: stable at kernel.org
Signed-off-by: Jesse Barnes <jbarnes at virtuousgeek.org>
---
 drivers/gpu/drm/i915/intel_display.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 432fc04..b265bd3 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6874,7 +6874,6 @@ void gen6_enable_rps(struct drm_i915_private *dev_priv)
 	I915_WRITE(GEN6_RC6pp_THRESHOLD, 64000); /* unused */
 
 	I915_WRITE(GEN6_RC_CONTROL,
-		   GEN6_RC_CTL_RC6p_ENABLE |
 		   GEN6_RC_CTL_RC6_ENABLE |
 		   GEN6_RC_CTL_EI_MODE(1) |
 		   GEN6_RC_CTL_HW_ENABLE);
-- 
1.7.1