In order to ensure constant caches are invalidated
properly with a0, we need extra hdc flush after invalidation.
v2: use IS_TGL_REVID (Chris)
References: HSDES#1604544889
Signed-off-by: Mika Kuoppala <mika.kuoppala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/gt/intel_lrc.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c
index 27b5259f2f66..5e98114a07a1 100644
--- a/drivers/gpu/drm/i915/gt/intel_lrc.c
+++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
@@ -3254,6 +3254,26 @@ static int gen12_emit_flush_render(struct i915_request *request,
*cs++ = preparser_disable(false);
intel_ring_advance(request, cs);
+
+ /*
+ * Wa_1604544889:tgl
+ */
+ if (IS_TGL_REVID(request->i915, TGL_REVID_A0, TGL_REVID_A0)) {
+ flags = 0;
+ flags |= PIPE_CONTROL_CS_STALL;
+ flags |= PIPE_CONTROL_HDC_PIPELINE_FLUSH;
+
+ flags |= PIPE_CONTROL_STORE_DATA_INDEX;
+ flags |= PIPE_CONTROL_QW_WRITE;
+
+ cs = intel_ring_begin(request, 6);
+ if (IS_ERR(cs))
+ return PTR_ERR(cs);
+
+ cs = gen8_emit_pipe_control(cs, flags,
+ LRC_PPHWSP_SCRATCH_ADDR);
+ intel_ring_advance(request, cs);
+ }
}
return 0;
--
2.17.1
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