> -----Original Message-----
> From: amd-gfx [mailto:amd-gfx-boun...@lists.freedesktop.org] On Behalf
> Of Xiangliang Yu
> Sent: Tuesday, April 11, 2017 3:31 AM
> To: amd-gfx@lists.freedesktop.org
> Cc: Min, Frank; Yu, Xiangliang
> Subject: [PATCH 2/3] drm/amdgpu/vce4: workaround VCE ring test slow
> issue
>
> Add VCE ring test slow workaround for SRIOV.
>
> Signed-off-by: Frank Min <frank....@amd.com>
> Signed-off-by: Xiangliang Yu <xiangliang...@amd.com>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c | 10 +++++++---
> 1 file changed, 7 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
> index e43c83f..cdff938 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
> @@ -955,7 +955,11 @@ int amdgpu_vce_ring_test_ring(struct amdgpu_ring
> *ring)
> struct amdgpu_device *adev = ring->adev;
> uint32_t rptr = amdgpu_ring_get_rptr(ring);
> unsigned i;
> - int r;
> + int r, timeout = adev->usec_timeout;
Do you need longer timeouts elsewhere as well? If so, it might make more sense
to just change the default setting for adev->usec_timeout for SR-IOV.
Alex
> +
> + /* workaround VCE ring test slow issue for sriov*/
> + if (amdgpu_sriov_vf(adev))
> + timeout *= 10;
>
> /* TODO: remove it if VCE can work for sriov */
> if (amdgpu_sriov_vf(adev))
> @@ -970,13 +974,13 @@ int amdgpu_vce_ring_test_ring(struct
> amdgpu_ring *ring)
> amdgpu_ring_write(ring, VCE_CMD_END);
> amdgpu_ring_commit(ring);
>
> - for (i = 0; i < adev->usec_timeout; i++) {
> + for (i = 0; i < timeout; i++) {
> if (amdgpu_ring_get_rptr(ring) != rptr)
> break;
> DRM_UDELAY(1);
> }
>
> - if (i < adev->usec_timeout) {
> + if (i < timeout) {
> DRM_INFO("ring test on %d succeeded in %d usecs\n",
> ring->idx, i);
> } else {
> --
> 2.7.4
>
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