[PATCH 077/117] drm/amdgpu: add a ring func for vcn start command

[Alex Deucher]

From: Leo Liu <leo.liu at amd.com>

Needed for the proper command sequence for VCN.

Signed-off-by: Leo Liu <leo.liu at amd.com>
Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c   | 3 +++
 drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h | 1 +
 2 files changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
index 9cd363a..ef93022 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
@@ -161,6 +161,9 @@ int amdgpu_ib_schedule(struct amdgpu_ring *ring, unsigned num_ibs,
 		return r;
 	}
 
+	if (ring->funcs->insert_start)
+		ring->funcs->insert_start(ring);
+
 	if (vm) {
 		r = amdgpu_vm_flush(ring, job);
 		if (r) {
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h
index b4d4ed4..7ee501f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h
@@ -131,6 +131,7 @@ struct amdgpu_ring_funcs {
 	int (*test_ib)(struct amdgpu_ring *ring, long timeout);
 	/* insert NOP packets */
 	void (*insert_nop)(struct amdgpu_ring *ring, uint32_t count);
+	void (*insert_start)(struct amdgpu_ring *ring);
 	void (*insert_end)(struct amdgpu_ring *ring);
 	/* pad the indirect buffer to the necessary number of dw */
 	void (*pad_ib)(struct amdgpu_ring *ring, struct amdgpu_ib *ib);
-- 
2.5.5