AMD A9 R5 GPU doesn't work after resume

Submitted by Samuel Sieb @ssieb

Assigned to Default DRI bug account

Link to original bug (#111524)

Description

CPU is AMD A9-9420 RADEON R5
GPU is: 00:01.0 0300: 1002:98e4 (rev da)
00:01.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Stoney [Radeon R2/R3/R4/R5 Graphics] (rev da) (prog-if 00 [VGA controller])
Subsystem: Hewlett-Packard Company Device 8330
Flags: bus master, fast devsel, latency 0, IRQ 35
Memory at e0000000 (64-bit, prefetchable) [size=256M]
Memory at f0800000 (64-bit, prefetchable) [size=8M]
I/O ports at 4000 [size=256]
Memory at f0400000 (32-bit, non-prefetchable) [size=256K]
Expansion ROM at 000c0000 [disabled] [size=128K]
Capabilities: [48] Vendor Specific Information: Len=08 >
Capabilities: [50] Power Management version 3
Capabilities: [58] Express Root Complex Integrated Endpoint, MSI 00
Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 >
Capabilities: [270] Secondary PCI Express <?>
Capabilities: [2b0] Address Translation Service (ATS)
Capabilities: [2c0] Page Request Interface (PRI)
Capabilities: [2d0] Process Address Space ID (PASID)
Kernel driver in use: amdgpu
Kernel modules: amdgpu

If I suspend the laptop then on resume the GPU does not work. I've tried with a 5.0 and a 5.2 kernel, same issue. dc=0 or dc=1 doesn't make any obvious difference. I have gpu recovery enabled, otherwise it really hangs. With Xorg, the screen looks the same as when suspended. With Wayland, there is bunch of garbage around. In both cases, the mouse moves around, but there are no screen updates. The following output shows up in dmesg with the last line repeating endlessly, probably correlated with screen update attempts:

[ 48.337053] [drm:amdgpu_job_timedout [amdgpu]] ERROR ring gfx timeout, signaled seq=73, emitted seq=75
[ 48.337202] [drm:amdgpu_job_timedout [amdgpu]] ERROR Process information: process gnome-shell pid 977 thread gnome-shel:cs0 pid 1005
[ 48.337206] [drm] IP block:gfx_v8_0 is hung!
[ 48.337319] amdgpu 0000:00:01.0: GPU reset begin!
[ 48.337761] amdgpu 0000:00:01.0: GRBM_SOFT_RESET=0x000F0001
[ 48.337817] amdgpu 0000:00:01.0: SRBM_SOFT_RESET=0x00000100
[ 48.468854] [drm] recover vram bo from shadow start
[ 48.468855] [drm] recover vram bo from shadow done
[ 48.468857] [drm] Skip scheduling IBs!
[ 48.500792] [drm:amdgpu_cs_ioctl [amdgpu]] ERROR Failed to initialize parser -125!
[ 48.502030] [drm:amdgpu_cs_ioctl [amdgpu]] ERROR Failed to initialize parser -125!
[ 48.503933] [drm:amdgpu_cs_ioctl [amdgpu]] ERROR Failed to initialize parser -125!
[ 49.144048] amdgpu 0000:00:01.0: GPU reset(2) succeeded!
[ 49.147491] [drm:amdgpu_cs_ioctl [amdgpu]] ERROR Failed to initialize parser -125!
[ 53.186659] [drm:amdgpu_cs_ioctl [amdgpu]] ERROR Failed to initialize parser -125!
[ 56.651026] [drm:amdgpu_cs_ioctl [amdgpu]] ERROR Failed to initialize parser -125!