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

["Gorski, Mateusz" <mateusz.gorski@linux.intel.com>]

>>
>> We have a mechanism to choose the PCM configuration of given topology 
>> path via amixer control. That way we can include both 2ch and 4ch 
>> DMIC configurations in one topology file and simply change DMIC 
>> pipeline configuration on runtime.
>>
>> Unfortunately this mechanism is not currently available on upstream.
>>
>> As said before, this is a reference topology, if needed I can also 
>> upload modified version with 4ch DMIC path.
>
> I don't understand the concept of 'reference topology'. It's not like 
> anyone is going to modify this file, which is seriously cryptic, so 
> it's got to be a 'usable topology', turn-key really.
>
> You would need three files, with no dmic, with 2 dmic with 4 dmic and 
> a driver level code selection. Today the code loads the topology name 
> coming from NHLT or dfw_sst.bin, you'd need a more elaborate logic to 
> deal with the hardware variants and without requiring any fiddling, 
> rename or edits of topology files.
>
>

I prepared 3 different topology .conf files and sent them in patch set. 
These topologies cover all three cases (no DMIC, 2ch DMIC capture and 
4ch DMIC capture). I also prepared and sent kernel patch adding third 
way of selecting topology binary file so that its name depends on used 
machine driver.

Thanks,
Mateusz