[Bug 204241] amdgpu fails to resume from suspend

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=204241

--- Comment #27 from Andreas Jackisch (andreas.jackisch at gmail.com) ---
In brief - the patch
"0001-drm-amdgpu-uvd6-fix-allocation-size-in-enc-ring-test.patch" didn't work
for me. After about 10 suspend/resume cycles the typical issue occurred again
and I had to SysRq the system.

Status, all gentoo kernels:
5.1.x  OK
4.19.74 OK
5.2.x FAIL
5.3.0 FAIL
5.3.2 w/ patch from comment#14 OK
5.3.6 FAIL
5.3.6 w/ patch 0001-drm-amdgpu-uvd6-fix-allocation-size-in-enc-ring-test FAIL
5.3.6 w/ patch 0001-drm-amdgpu-uvd6-use-0-as-dummy-pointer-in-enc-ring-t OK

The last setup has seen 30+ suspend/resume cycles. I'll continue to use this.

So, to me it looks like that increasing the allocation did not help but
assigning 0 to the dummy pointer did.

My hardware is comparable to the one listed in comment#25
- Radeon RX550
- Ryzen 1700

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