The suggestion from the spec is to do l3 fabric flush not L3 flush.
Fixes: 78a6ccd65fa3 ("drm/i915/gt: Ensure memory quiesced before
invalidation")
Cc: Jonathan Cavitt <jonathan.cavitt@xxxxxxxxx>
Cc: Andi Shyti <andi.shyti@xxxxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> # v5.8+
Cc: Nirmoy Das <nirmoy.das@xxxxxxxxx>
Cc: Andrzej Hajda <andrzej.hajda@xxxxxxxxx>
Cc: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Cc: Matt Roper <matthew.d.roper@xxxxxxxxx>
Cc: Lucas De Marchi <lucas.demarchi@xxxxxxxxx>
Cc: Tejas Upadhyay <tejas.upadhyay@xxxxxxxxx>
Cc: Prathap Kumar Valsan <prathap.kumar.valsan@xxxxxxxxx>
Signed-off-by: Nirmoy Das <nirmoy.das@xxxxxxxxx>
---
drivers/gpu/drm/i915/gt/gen8_engine_cs.c | 6 +++++-
drivers/gpu/drm/i915/gt/intel_gpu_commands.h | 1 +
2 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/gt/gen8_engine_cs.c b/drivers/gpu/drm/i915/gt/gen8_engine_cs.c
index 0143445dba83..a4b241d502c8 100644
--- a/drivers/gpu/drm/i915/gt/gen8_engine_cs.c
+++ b/drivers/gpu/drm/i915/gt/gen8_engine_cs.c
@@ -272,7 +272,11 @@ int gen12_emit_flush_rcs(struct i915_request *rq, u32 mode)
bit_group_0 |= PIPE_CONTROL_CCS_FLUSH;
bit_group_1 |= PIPE_CONTROL_TILE_CACHE_FLUSH;
- bit_group_1 |= PIPE_CONTROL_FLUSH_L3;
+ if (mode & EMIT_FLUSH)
+ bit_group_1 |= PIPE_CONTROL_FLUSH_L3;
+ else if (gen12_needs_ccs_aux_inv(engine))
+ bit_group_1 |= PIPE_CONTROL_L3_FABRIC_FLUSH;
+
bit_group_1 |= PIPE_CONTROL_RENDER_TARGET_CACHE_FLUSH;
bit_group_1 |= PIPE_CONTROL_DEPTH_CACHE_FLUSH;
/* Wa_1409600907:tgl,adl-p */
diff --git a/drivers/gpu/drm/i915/gt/intel_gpu_commands.h b/drivers/gpu/drm/i915/gt/intel_gpu_commands.h
index 2bd8d98d2110..12e8dc481c53 100644
--- a/drivers/gpu/drm/i915/gt/intel_gpu_commands.h
+++ b/drivers/gpu/drm/i915/gt/intel_gpu_commands.h
@@ -284,6 +284,7 @@
#define DISPLAY_PLANE_A (0<<20)
#define DISPLAY_PLANE_B (1<<20)
#define GFX_OP_PIPE_CONTROL(len) ((0x3<<29)|(0x3<<27)|(0x2<<24)|((len)-2))
+#define PIPE_CONTROL_L3_FABRIC_FLUSH (1<<30)
#define PIPE_CONTROL_COMMAND_CACHE_INVALIDATE (1<<29) /* gen11+ */
#define PIPE_CONTROL_TILE_CACHE_FLUSH (1<<28) /* gen11+ */
#define PIPE_CONTROL_FLUSH_L3 (1<<27)
--
2.41.0
