[Bug 111551] [drm:amdgpu_job_timedout [amdgpu]] *ERROR* ring sdma1 timeout

https://bugs.freedesktop.org/show_bug.cgi?id=111551

--- Comment #4 from yanhua 78666679@qq.com --- I have asked hardware team, they have tested, and can be sure there are no power supply problem.

The system is arm64 with 64 cores. and there are three amdgpu card in the board.

there are rarely gfx timeout, sdma timeout, and vce timeout. When the ring timeout occur, we can use amd supplied tools umr to read chip registers. can we know the real cause from the register value?

with the coherency problem you said, I think if that was true. the problem should occur more frequently. I'm not sure.