[Bug 212655] AMDGPU crashes when resuming from suspend when amd_iommu=on

[bugzilla-daemon at kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=212655

jurik.phys at gmail.com changed:

           What    |Removed                     |Added
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                 CC|                            |jurik.phys at gmail.com

--- Comment #2 from jurik.phys at gmail.com ---
I have thе same problem but resume error occurs sometimes, not every time. 

OS: Debian GNU/Linux 11 (bullseye)
Kernel from backports (native kernel also have this problem):
6.1.0-0.deb11.7-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.20-2~bpo11+1 
GPU: RX5500XT (MSI).

I noticed that if the graphics card's RGB backlight went out when going to
sleep, then resume from sleep state will succeed. 

But if the backlight remained active when going to sleep, then the resume will
fail. In this case in systemd journal I have next

amdgpu 0000:03:00.0: amdgpu: SMU: I'm not done with your previous command:
SMN_C2PMSG_66:0x0000003A SMN_C2PMSG_82:0x00000000
amdgpu 0000:03:00.0: amdgpu: RunBtc failed!
amdgpu 0000:03:00.0: amdgpu: Failed to setup smc hw! 
[drm:amdgpu_device_ip_resume_phase2 [amdgpu]] *ERROR* resume of IP block <smu>
failed -62 
amdgpu 0000:03:00.0: amdgpu: amdgpu_device_ip_resume failed (-62).
amdgpu 0000:03:00.0: PM: dpm_run_callback(): pci_pm_resume+0x0/0xe0 returns -62 
amdgpu 0000:03:00.0: PM: failed to resume async: error -62

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