drm/i915/skl: Implement WaCcsTlbPrefetchDisable:skl

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Nick Hoath <nicholas.hoath@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index ecc14f5..8c9e150 100644 (file)
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -6209,6 +6209,7 @@ enum skl_disp_power_wells {
 
 #define GEN9_HALF_SLICE_CHICKEN5       0xe188
 #define   GEN9_DG_MIRROR_FIX_ENABLE    (1<<5)
+#define   GEN9_CCS_TLB_PREFETCH_ENABLE (1<<3)
 
 #define GEN8_ROW_CHICKEN               0xe4f0
 #define   PARTIAL_INSTRUCTION_SHOOTDOWN_DISABLE        (1<<8)

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 29873ff..3c66d80 100644 (file)
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -984,6 +984,10 @@ static int gen9_init_workarounds(struct intel_engine_cs *ring)
        /* WaDisablePartialResolveInVc:skl */
        WA_SET_BIT_MASKED(CACHE_MODE_1, GEN9_PARTIAL_RESOLVE_IN_VC_DISABLE);
 
+       /* WaCcsTlbPrefetchDisable:skl */
+       WA_CLR_BIT_MASKED(GEN9_HALF_SLICE_CHICKEN5,
+                         GEN9_CCS_TLB_PREFETCH_ENABLE);
+
        return 0;
 }