[CARRIZO] amdgpu fails to resume from S3, atombios stuck executing C554 (len 629, WS 0, PS 0)

Submitted by Johannes Hirte

Assigned to Default DRI bug account

Link to original bug (#109526)

Description

there is already a similar report at kernel bugzilla, but nobody took notice: https://bugzilla.kernel.org/show_bug.cgi?id=190971

It's a kernel bug, first seen with linux-4.20 on my Carrizo. I don't have a testcase for reproducing, so it's hard to bisect. Sometimes it happens multiple times a day, with every suspend-resume cycle. Sometimes the machine works for several days with at least two suspend-resume-cycles per day.