APPLIED [OEM-5.14] Re: [PATCH 0/2][SRU][J/OEM-5.14] UBUNTU: SAUCE: Fix With 20.04d kernel and WX3200, unit freezes on resume

[Timo Aaltonen]

Koba Ko kirjoitti 23.2.2022 klo 3.38:
> BugLink: https://bugs.launchpad.net/bugs/1961855
> 
> [Impact]
> With WX3200 and 20.04d kernel the unit freezes on resume
> 
> [Fix]
> commit 0064b0ce85bb ("drm/amd/pm: enable ASPM by default") enabled ASPM
> by default but a variety of hardware configurations it turns out that this
> caused a regression.
> 
> * PPC64LE hardware does not support ASPM at a hardware level.
>    CONFIG_PCIEASPM is often disabled on these architectures.
> * Some dGPUs on ALD platforms don't work with ASPM enabled and PCIe
>    subsystem disables it
> 
> Check with the PCIe subsystem to see that ASPM has been enabled
> or not.
> 
> [Test Case]
> 1. plug wx3200 on the adl machine and make it as a output.
> 2. suspend&resume machine
> 3. check if machine could resume successfully
> 
> [Where problems could occur]
> Low, just disable AMDGPU ASPM if system doesn't enable it.
> 
> Mario Limonciello (1):
>    UBUNTU: SAUCE: drm/amd: Check if ASPM is enabled from PCIe subsystem
> 
>   drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 4 ++++
>   1 file changed, 4 insertions(+)
> 

applied to oem-5.14, thanks

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