Change in coreboot[master]: soc/intel/tigerlake: Add ACPI addition for USB4/TBT latency optimization

[John Zhao (Code Review)]

Attention is currently required from: Tim Wawrzynczak, Paul Menzel.
John Zhao has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/57625 )

Change subject: soc/intel/tigerlake: Add ACPI addition for USB4/TBT latency optimization
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Patch Set 3:

(3 comments)

Patchset:

PS2:
> Thanks John, do you have a link to the corresponding kernel patches?

kernel ../driver/pci/pci-acpi.c has pci_acpi_optimize_delay for the corresponding function index 9 implementation.

File src/soc/intel/tigerlake/acpi/tcss_pcierp.asl:

PS2:
> Does this also apply to alderlake?

It could be applicable to Alderlake. We will also try to validate on it.

https://review.coreboot.org/c/coreboot/+/57625/comment/2435f80b_2a7d33b2 
PS2, Line 103: If (Arg2 == 9
> Support for this new function needs to be advertised in Function 0

Ack