[coreboot-gerrit] Change in coreboot[master]: soc/intel/tigerlake/apci: Only use SCM for ChromeOS

[Michael Niewöhner (Code Review)]

Attention is currently required from: Sean Rhodes.
Michael Niewöhner has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/58798 )

Change subject: soc/intel/tigerlake/apci: Only use SCM for ChromeOS
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Patch Set 14:

(1 comment)

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

https://review.coreboot.org/c/coreboot/+/58798/comment/bbc200b7_b8de21c2 
PS14, Line 159: Software Connection Manager doesn't work with Linux 5.13 or later
I don't get it - what is the reason for that? I'm not that familiar with USB4/TB3 yet, but from what I have read SCM is a) preferred and b) can be present as fallback for compatibility. [1]

I'm not sure what firmware is meant when speaking of Firmware CM - host firmware (coreboot), EC firmware, TB3/USB4 controller firmware?

Maybe someone can elighten me? :-)

[1] https://lwn.net/Articles/802961/