More Generic Audio Graph Sound Card idea

[Pierre-Louis Bossart]

> If a device is hard limited to particular slots we can presumably
> discover that (either through the spec or by keying off the ID
> registers) and do the right thing?  In any case if we need a firmware
> mapping for DT systems it sounds like something that works for TDM
> should be mappable onto SoundWire channels easily enough.

yes, if we can define a notion of logical TDM 'slot group' (e.g. 
headphone, mic, streamA, <add tag here>, etc), then the mapping with 
SoundWire data ports is straightforward. The mapping would typically 
come from platform firmware, not by checking device registers.

The actual value of a TDM slot which defines the transport position is 
however irrelevant for SoundWire.