[PATCH 1/8] drm/i915/bdw: 3D_CHICKEN3 has write mask bits

[Timo Aaltonen]

From: Michel Thierry <michel.thierry at intel.com>

BugLink: http://bugs.launchpad.net/bugs/1374389

The workaround to limit SDE poly depth FIFO to 2 is not applied because
3D Chicken-3 mask bit is not set.

WaLimitSizeOfSDEPolyFifo is only for BDW-A and could be removed.

Signed-off-by: Michel Thierry <michel.thierry at intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala at intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
(cherry picked from commit b3f9ad93b7621364ed51f9c37b9cf9abc9855991)
Signed-off-by: Timo Aaltonen <timo.aaltonen at canonical.com>

---
 drivers/gpu/drm/i915/intel_pm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index e6f131d..f003655 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -5105,7 +5105,7 @@ static void gen8_init_clock_gating(struct drm_device *dev)
 	I915_WRITE(GAMTARBMODE, _MASKED_BIT_ENABLE(ARB_MODE_BWGTLB_DISABLE));
 
 	I915_WRITE(_3D_CHICKEN3,
-		   _3D_CHICKEN_SDE_LIMIT_FIFO_POLY_DEPTH(2));
+		   _MASKED_BIT_ENABLE(_3D_CHICKEN_SDE_LIMIT_FIFO_POLY_DEPTH(2)));
 
 	I915_WRITE(COMMON_SLICE_CHICKEN2,
 		   _MASKED_BIT_ENABLE(GEN8_CSC2_SBE_VUE_CACHE_CONSERVATIVE));
-- 
2.1.4