[PATCH 4/5] chtrt5645: Remove bogus JackHWMute settings

[Pierre-Louis Bossart]

>>> If I follow the logic, I guess we should also remove the JackHWMute 
>>> for sof-bdw-rt5677, hda-dsp and HDA-Intel. I can't think of a 
>>> hardware limitation preventing the headset mic from being used while 
>>> the speakers are used for playback. Likewise the rt5650 is a cheaper 
>>> version of rt5645 so the same applies.
>>
>> Right AFAIK:
>>
>> JackHWMute "foo"
>>
>> Means that the JackControl listed in the same section does
>> something at the hardware level which makes it impossible
>> for the "foo" input / output to function until the jack
>> is removed. Typically this would be something like actually
>> disconnecting the speakers at the electrical level.
>>
>> So almost always using it is wrong.
> 
> I agree. The description is really straight (use-case.h):
> 
> "Note that JackHWMute should be used only when the hardware enforces the 
> automatic muting."
> 
> Pierre, it seems that hds-dsp uses JackHWMute for Speaker and 
> Headphones, I think that it should be removed. Otherwise PA thinks that 
> those devices cannot be used simultaneously when user wants to..

Right, that hda-dsp UCM config probably needs more work between the 
JackHWMute and only supporting 2 HDMI paths, but that's not maintained 
by me or anyone on the SOF team. Adding Mateusz Gorski in Cc: