drm/amdgpu:use clear_ring to clr RB

In resume routine, we need clr RB prior to the
ring test of engine, otherwise some engine hang
duplicated during GPU reset.

Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

3 files changed, 3 insertions, 1 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
index 7c842b7f1004..cead88ac3788 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
@@ -230,7 +230,7 @@ int amdgpu_ring_init(struct amdgpu_device *adev, struct amdgpu_ring *ring,
                         dev_err(adev->dev, "(%d) ring create failed\n", r);
                         return r;
                 }
-                memset((void *)ring->ring, 0, ring->ring_size);
+                amdgpu_ring_clear_ring(ring);
         }
         ring->ptr_mask = (ring->ring_size / 4) - 1;
         ring->max_dw = max_dw;
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
index b2bfee3e5b67..e09dd5e5b58a 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
@@ -4515,6 +4515,7 @@ static int gfx_v8_0_cp_gfx_resume(struct amdgpu_device *adev)
         }
 
         /* start the ring */
+        amdgpu_ring_clear_ring(ring);
         gfx_v8_0_cp_gfx_start(adev);
         ring->ready = true;
         r = amdgpu_ring_test_ring(ring);
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
index 47e6f146aa25..1ac876fe3d5a 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
@@ -615,6 +615,7 @@ static int sdma_v3_0_gfx_resume(struct amdgpu_device *adev)
 
         for (i = 0; i < adev->sdma.num_instances; i++) {
                 ring = &adev->sdma.instance[i].ring;
+                amdgpu_ring_clear_ring(ring);
                 wb_offset = (ring->rptr_offs * 4);
 
                 mutex_lock(&adev->srbm_mutex);