From: Ville Syrjälä <[email protected]>

Wa4x4STCOptimizationDisable got only implemented for BDW, but according
to the w/a database CHV needs it too, so add it.

Signed-off-by: Ville Syrjälä <[email protected]>
---
 drivers/gpu/drm/i915/intel_ringbuffer.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c 
b/drivers/gpu/drm/i915/intel_ringbuffer.c
index d7aa5c4..2a1a178 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -851,6 +851,10 @@ static int chv_init_workarounds(struct intel_engine_cs 
*ring)
         */
        WA_CLR_BIT_MASKED(CACHE_MODE_0_GEN7, HIZ_RAW_STALL_OPT_DISABLE);
 
+       /* Wa4x4STCOptimizationDisable:chv */
+       WA_SET_BIT_MASKED(CACHE_MODE_1,
+                         GEN8_4x4_STC_OPTIMIZATION_DISABLE);
+
        /* Improve HiZ throughput on CHV. */
        WA_SET_BIT_MASKED(HIZ_CHICKEN, CHV_HZ_8X8_MODE_IN_1X);
 
-- 
2.0.5

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