drm/i915/gen9: Implement WaDisableDgMirrorFixInHalfSliceChicken5
Move WaDisableDgMirrorFixInHalfSliceChicken5 to gen9_init_workarounds
v2: Added stepping check
v3: Removed unused register bitmap
Signed-off-by: Nick Hoath <nicholas.hoath@intel.com>
[danvet: Bikesheds.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index b869f1c..248db51 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -882,6 +882,16 @@
WA_SET_BIT_MASKED(GEN8_ROW_CHICKEN,
PARTIAL_INSTRUCTION_SHOOTDOWN_DISABLE);
+ if (INTEL_REVID(dev) == SKL_REVID_A0) {
+ /*
+ * WaDisableDgMirrorFixInHalfSliceChicken5:skl
+ * This is a pre-production w/a.
+ */
+ I915_WRITE(GEN9_HALF_SLICE_CHICKEN5,
+ I915_READ(GEN9_HALF_SLICE_CHICKEN5) &
+ ~GEN9_DG_MIRROR_FIX_ENABLE);
+ }
+
return 0;
}