Config: need auto detection and fallback between SOF/SST/Legacy drivers about linux HOT 5 CLOSED

@keyonjie could you help to take care of this?

from linux.

This may need refine/unified probing(especially for sof and sst) part, furthermore, sometimes using sof or sst is totally an user end choice(e.g. on those no FW authentication skl- platforms), we can't make selection for end-user in hard-coded logic.

I thought of using exclusive kernel config item for SOF and SST, which means if you select one(the other one will be unselected automatically), but the cons of doing that is we can't configure e.g byt with SST + apl with SOF, I am afraid someone make want to try something like that, even though this is not important for me.

@lgirdwood any comments?

from linux.

This is an enhancement actually, so set label "enhancement"

from linux.

@keyonjie We will have a single PCI and single ACPI entry point for all Intel SOF and legacy drivers. Drivers will default to legacy unless they are mentioned in the SOF lookup table (table of DMI names, DT names).

from linux.

Mechanism implemented upstream (will be in 4.21), SOF needs to implement the PCI class/subclass detection as described in #468

from linux.