> -----Original Message-----
> From: amd-gfx [mailto:amd-gfx-boun...@lists.freedesktop.org] On Behalf
> Of Monk Liu
> Sent: Wednesday, February 08, 2017 4:27 AM
> To: amd-gfx@lists.freedesktop.org
> Cc: Liu, Monk
> Subject: [PATCH 10/11] 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.
>
> Change-Id: Ie28f5aa677074f922e4a1a2eeeb7fe06461d9bdb
> Signed-off-by: Monk Liu <monk....@amd.com>
Reviewed-by: Alex Deucher <alexander.deuc...@amd.com>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c | 2 +-
> drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c | 1 +
> drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c | 1 +
> 3 files changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
> index 7bacf3c..37d8422 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 b0612d1..6584173 100644
> --- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
> @@ -4509,6 +4509,7 @@ 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 9394ca6..d5206f5 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);
> --
> 2.7.4
>
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