This is mainly required for preemption.
Cc: Dave Gordon <david.s.gor...@intel.com>
Signed-off-by: Arun Siluvery <arun.siluv...@linux.intel.com>
---
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 5a2ad10..af95091 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -980,6 +980,10 @@ static int gen9_init_workarounds(struct intel_engine_cs
*ring)
/* WaDisableSTUnitPowerOptimization:skl,bxt */
WA_SET_BIT_MASKED(HALF_SLICE_CHICKEN2, GEN8_ST_PO_DISABLE);
+ /* WaOCLCoherentLineFlush:skl,bxt */
+ I915_WRITE(GEN8_L3SQCREG4, (I915_READ(GEN8_L3SQCREG4) |
+ GEN8_LQSC_FLUSH_COHERENT_LINES));
+
/* WaEnablePreemptionGranularityControlByUMD:skl,bxt */
ret= wa_ring_whitelist_reg(ring, GEN8_CS_CHICKEN1);
if (ret)
--
1.9.1
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