[Bug 110886] After S3 resume, kernel: [drm] psp command failed and response status is (-65529) at 27th time of S3. 28th time of S3 freeze the system.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110886

--- Comment #22 from Kai-Heng Feng <kai.heng.feng at canonical.com> ---
(In reply to Andrey Grodzovsky from comment #21)
> In fact please rebase latest drm-next from here -
> https://cgit.freedesktop.org/~agd5f/linux/log/?h=amd-staging-drm-next, there
> are 2 changes by Alex in communication with PSP with might help 
> 
> drm/amdgpu/psp: invalidate the hdp read cache before reading the psp
> response   
> drm/amdgpu/psp: flush HDP write fifo after submitting cmds to the psp  
> 
> See if the PSP errors go away with that.

The slightly different error message still popped out after 27th S3, and 28th
S3 attempt froze the system:
Sep 28 05:38:44 u-HP-ProBook-645-G4 kernel: [drm:psp_hw_start.cold [amdgpu]]
*ERROR* PSP load asd failed!
Sep 28 05:38:44 u-HP-ProBook-645-G4 kernel: [drm:psp_resume [amdgpu]] *ERROR*
PSP resume failed
Sep 28 05:38:44 u-HP-ProBook-645-G4 kernel: [drm:amdgpu_device_fw_loading
[amdgpu]] *ERROR* resume of IP block <psp> failed -22
Sep 28 05:38:44 u-HP-ProBook-645-G4 kernel: [drm:amdgpu_device_resume [amdgpu]]
*ERROR* amdgpu_device_ip_resume failed (-22).
Sep 28 05:38:44 u-HP-ProBook-645-G4 kernel: PM: dpm_run_callback():
pci_pm_resume+0x0/0xa0 returns -22
Sep 28 05:38:44 u-HP-ProBook-645-G4 kernel: PM: Device 0000:04:00.0 failed to
resume async: error -22

$ journalctl -b -1 -k | grep "suspend entry (deep)" | wc -l
28

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