[PATCH] drm/amdgpu: add ring test for page queue

[Christian König]

Am 18.10.18 um 12:14 schrieb Huang Rui:
> We add page queue for sdma to update page table. So here it also needs ring test
> to verify it workable during the initialization.
>
> Signed-off-by: Huang Rui <ray.huang at amd.com>

Reviewed-by: Christian König <christian.koenig at amd.com>

> ---
>   drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c | 9 +++++++++
>   1 file changed, 9 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
> index 6ad4fda..ede149a 100644
> --- a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
> @@ -1150,6 +1150,15 @@ static int sdma_v4_0_start(struct amdgpu_device *adev)
>   			return r;
>   		}
>   
> +		if (adev->sdma.has_page_queue) {
> +			ring = &adev->sdma.instance[i].page;
> +			r = amdgpu_ring_test_ring(ring);
> +			if (r) {
> +				ring->ready = false;
> +				return r;
> +			}
> +		}
> +
>   		if (adev->mman.buffer_funcs_ring == ring)
>   			amdgpu_ttm_set_buffer_funcs_status(adev, true);
>   	}