Public bug reported:
[ Impact ]
* Firmware update on BMG hardware can override default link speed which can
lead
to broken communication when PCIe gen 5 is too unstable. Some hardware is able
to auto-downgrade their speed in order to recover from such situation and setup
more efficient configuration. Expose hardware status and the support of such
feature.
[ Fix ]
* Backport from linux-next:
[ Test Plan ]
* Compile and boot tested.
* Tested by intel.
[ Where problems could occur ]
* Regression in BMG hardware support.
[ Other Info ]
* Backported by intel.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu Plucky)
Importance: Undecided
Assignee: Thibault Ferrante (thibf)
Status: New
** Also affects: linux (Ubuntu Plucky)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Plucky)
Assignee: (unassigned) => Thibault Ferrante (thibf)
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https://bugs.launchpad.net/bugs/2112308
Title:
Expose PCIe downgrade support/status for BMG hardware
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