[PATCH v2] topology: Add topology file for generic HDA DSP machine driver

[Gorski, Mateusz]

>> +SectionPCMCapabilities."DMIC-Capture" {
>> +    formats "S16_LE"
>> +    rates "48000"
>> +    channels_min "2"
>> +    channels_max "2"
>> +    sig_bits "16"
>> +}
>
> NHLT reports 4 microphones on a number of devices, is there any 
> specific reason to limit the capture to 2ch?
>
> I believe the generic Hdaudio card now reports the number of channels 
> to pulseaudio, so it's possible that PulseAudio would open a 4ch 
> stream but be told sorry no can do by topology.
>
> FWIW we ended-up selecting different topology files in SOF, depending 
> on whether we had 0, 2 or 4 mics.


This patch was prepared to address many issues regarding broken DMIC 
configurations.

You are right - there are different DMIC configurations on different 
devices, but, since path multi-configuration feature is not upstreamed 
in cAVS driver, we are not able to include all of these in one topology 
file.

This is a reference topology, and it was successfully validated on few 
production laptops (including models on which DMIC capture was not 
working).