On 5/27/19 3:42 AM, S, Shirish wrote:
From: Louis Li <ching-shih...@amd.com><mailto:ching-shih...@amd.com>
[What]
vce ring test fails consistently during resume in s3 cycle, due to
mismatch read & write pointers.
On debug/analysis its found that rptr to be compared is not being
correctly updated/read, which leads to this failure.
Below is the failure signature:
[drm:amdgpu_vce_ring_test_ring] *ERROR* amdgpu: ring 12 test failed
[drm:amdgpu_device_ip_resume_phase2] *ERROR* resume of IP block
<vce_v3_0> failed -110
[drm:amdgpu_device_resume] *ERROR* amdgpu_device_ip_resume failed
(-110).
[How]
fetch rptr appropriately, meaning move its read location further down
in the code flow.
With this patch applied the s3 failure is no more seen for >5k s3 cycles,
which otherwise is pretty consistent.
Signed-off-by: Louis Li <ching-shih...@amd.com><mailto:ching-shih...@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
index c021b11..92f9d46 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
@@ -1084,6 +1084,8 @@ int amdgpu_vce_ring_test_ring(struct amdgpu_ring *ring)
if (r)
return r;
+ rptr = amdgpu_ring_get_rptr(ring);
+
The rptr update is there:
uint32_t rptr = amdgpu_ring_get_rptr(ring);
Are you sure this is the root cause?
Regards,
Leo
amdgpu_ring_write(ring, VCE_CMD_END);
amdgpu_ring_commit(ring);
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