diff --git a/[refs] b/[refs]
index 21c3b12a26d4..229dd7970b7f 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 6b26c86d615747f67fede6ca9609b0f8b2037d11
+refs/heads/master: 97e1930f09e9b656e823cd841cf29bfbbe326832
diff --git a/trunk/drivers/gpu/drm/i915/intel_pm.c b/trunk/drivers/gpu/drm/i915/intel_pm.c
index a26bf49c4649..93d4ce3fc122 100644
--- a/trunk/drivers/gpu/drm/i915/intel_pm.c
+++ b/trunk/drivers/gpu/drm/i915/intel_pm.c
@@ -2776,6 +2776,10 @@ static void ivybridge_init_clock_gating(struct drm_device *dev)
 	}
 
 	gen7_setup_fixed_func_scheduler(dev_priv);
+
+	/* WaDisable4x2SubspanOptimization */
+	I915_WRITE(CACHE_MODE_1,
+		   _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE));
 }
 
 static void valleyview_init_clock_gating(struct drm_device *dev)