From: Jonathan Cavitt <jonathan.cavitt@xxxxxxxxx>
All memory traffic must be quiesced before requesting
an aux invalidation on platforms that use Aux CCS.
Fixes: 972282c4cf24 ("drm/i915/gen12: Add aux table invalidate for all engines")
Signed-off-by: Jonathan Cavitt <jonathan.cavitt@xxxxxxxxx>
Signed-off-by: Andi Shyti <andi.shyti@xxxxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> # v5.8+
---
drivers/gpu/drm/i915/gt/gen8_engine_cs.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/gpu/drm/i915/gt/gen8_engine_cs.c b/drivers/gpu/drm/i915/gt/gen8_engine_cs.c
index 563efee055602..e10e1ad0e841f 100644
--- a/drivers/gpu/drm/i915/gt/gen8_engine_cs.c
+++ b/drivers/gpu/drm/i915/gt/gen8_engine_cs.c
@@ -202,6 +202,13 @@ int gen12_emit_flush_rcs(struct i915_request *rq, u32 mode)
{
struct intel_engine_cs *engine = rq->engine;
+ /*
+ * Aux invalidations on Aux CCS platforms require
+ * memory traffic is quiesced prior.
+ */
+ if (!HAS_FLAT_CCS(engine->i915))
+ mode |= EMIT_FLUSH;
+
if (mode & EMIT_FLUSH) {
u32 flags = 0;
int err;
--
2.40.1
