APPLIED[U]: [PATCH 0/2][SRU][OEM-6.0/Unstable] Fix USB4 PCIe hotplug on AMD Pink Sardine
Andrea Righi
andrea.righi at canonical.com
Wed Oct 12 06:32:07 UTC 2022
On Tue, Sep 27, 2022 at 04:18:12PM +0800, You-Sheng Yang wrote:
> From: "You-Sheng Yang (vicamo)" <vicamo.yang at canonical.com>
>
> BugLink: https://bugs.launchpad.net/bugs/1990922
>
> [Impact]
>
> For some reason that PCIe device hotplug is disabled once another OS
> stack launches prior to Linux CM, which makes some registers not go
> properly, so correct those registers to meet the default value of the
> USB4 spec.
>
> [Fix]
>
> Two commits targeting v6.1 to restore the default values.
>
> [Test Case]
>
> To be verified from ODM side.
>
> [Where problems could occur]
>
> These two commits restores the default values as expected from USB4 spec
> at being initialized, so it should be the right behaviour anyway.
>
> [Other Info]
>
> While this is for AMD Phoenix/Phoenix2 platforms, only oem-6.0 and newer
> are nominated for fix.
Applied only patch 2/2 to kinetic/linux-unstable. Patch 1/1 was already
applied via regular rebase.
-Andrea
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