[PATCH v3 3/5] drm/i915/gt: Enable the CCS_FLUSH bit in the pipe control

[Andi Shyti]

Enable the CCS_FLUSH bit 13 in the control pipe for render and
compute engines in platforms starting from Meteor Lake (BSPEC
43904 and 47112).

Fixes: 972282c4cf24 ("drm/i915/gen12: Add aux table invalidate for all engines")
Signed-off-by: Andi Shyti <andi.shyti at linux.intel.com>
Cc: Jonathan Cavitt <jonathan.cavitt at intel.com>
Cc: Nirmoy Das <nirmoy.das at intel.com>
Cc: <stable at vger.kernel.org> # v5.8+
---
 drivers/gpu/drm/i915/gt/gen8_engine_cs.c     | 12 +++++++++++-
 drivers/gpu/drm/i915/gt/intel_engine_types.h |  1 +
 drivers/gpu/drm/i915/gt/intel_gpu_commands.h |  1 +
 3 files changed, 13 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 bee3b7dc595cf..04484385189ad 100644
--- a/drivers/gpu/drm/i915/gt/gen8_engine_cs.c
+++ b/drivers/gpu/drm/i915/gt/gen8_engine_cs.c
@@ -207,7 +207,7 @@ int gen12_emit_flush_rcs(struct i915_request *rq, u32 mode)
 	 * memory traffic is quiesced prior.
 	 */
 	if ((mode & EMIT_INVALIDATE) && !HAS_FLAT_CCS(engine->i915))
-		mode |= EMIT_FLUSH;
+		mode |= EMIT_FLUSH | EMIT_CCS_FLUSH;
 
 	if (mode & EMIT_FLUSH) {
 		u32 flags = 0;
@@ -232,6 +232,16 @@ int gen12_emit_flush_rcs(struct i915_request *rq, u32 mode)
 
 		flags |= PIPE_CONTROL_CS_STALL;
 
+		/*
+		 * When required, in MTL+ platforms, in the render and compute
+		 * engines we need to set the CCS_FLUSH bit in the pipe control
+		 */
+		if (mode & EMIT_CCS_FLUSH &&
+		    GRAPHICS_VER_FULL(rq->i915) >= IP_VER(12, 70) &&
+		    (engine->class == RENDER_CLASS ||
+		     engine->class == COMPUTE_CLASS))
+			flags |= PIPE_CONTROL_CCS_FLUSH;
+
 		if (!HAS_3D_PIPELINE(engine->i915))
 			flags &= ~PIPE_CONTROL_3D_ARCH_FLAGS;
 		else if (engine->class == COMPUTE_CLASS)
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_types.h b/drivers/gpu/drm/i915/gt/intel_engine_types.h
index e99a6fa03d453..e2cae9d02bd62 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_engine_types.h
@@ -514,6 +514,7 @@ struct intel_engine_cs {
 	int		(*emit_flush)(struct i915_request *request, u32 mode);
 #define EMIT_INVALIDATE	BIT(0)
 #define EMIT_FLUSH	BIT(1)
+#define EMIT_CCS_FLUSH	BIT(2) /* MTL+ */
 #define EMIT_BARRIER	(EMIT_INVALIDATE | EMIT_FLUSH)
 	int		(*emit_bb_start)(struct i915_request *rq,
 					 u64 offset, u32 length,
diff --git a/drivers/gpu/drm/i915/gt/intel_gpu_commands.h b/drivers/gpu/drm/i915/gt/intel_gpu_commands.h
index 5d143e2a8db03..5df7cce23197c 100644
--- a/drivers/gpu/drm/i915/gt/intel_gpu_commands.h
+++ b/drivers/gpu/drm/i915/gt/intel_gpu_commands.h
@@ -299,6 +299,7 @@
 #define   PIPE_CONTROL_QW_WRITE				(1<<14)
 #define   PIPE_CONTROL_POST_SYNC_OP_MASK                (3<<14)
 #define   PIPE_CONTROL_DEPTH_STALL			(1<<13)
+#define   PIPE_CONTROL_CCS_FLUSH			(1<<13) /* MTL+ */
 #define   PIPE_CONTROL_WRITE_FLUSH			(1<<12)
 #define   PIPE_CONTROL_RENDER_TARGET_CACHE_FLUSH	(1<<12) /* gen6+ */
 #define   PIPE_CONTROL_INSTRUCTION_CACHE_INVALIDATE	(1<<11) /* MBZ on ILK */
-- 
2.40.1