[alsa-devel] Cherry Trail + RT5645 devices analog microphone not working.

[Bard Liao]

> -----Original Message-----
> From: Hans de Goede [mailto:hdegoede at redhat.com]
> Sent: Monday, January 01, 2018 8:32 PM
> To: Bard Liao
> Cc: Pierre-Louis Bossart; alsa-devel at alsa-project.org
> Subject: Re: Cherry Trail + RT5645 devices analog microphone not working.
> 
> Hi,
> 
> On 29-12-17 03:10, Bard Liao wrote:
> >> Some questions for you:
> >>
> >> 1) I think enabling micbias2 may be a problem on devices with a DMIC,
> >> could this be a problem?  Currently the codec driver itself contains
> >> quirks for dmic pin-mapping, maybe we should leave micbias2 disabled
> >> if dmic pin-mapping is specified through a quirk?
> >
> > No, micbias2 and DMIC are independent and micbias2 will not be enabled
> > if we don't add it in the audio route. So I don't think we need to disable it
> > if dmic pin-mapping is specified.
> 
> Right, but currently we use the "Int Mic" switch in both the DMIC and analog
> mic paths, and the changes to the machine driver enable micbias2 when Int
> Mic
> gets turned on. After my changes the machine driver has:
> 
> 	{"IN2P", NULL, "Int Mic"},
> 	{"IN2N", NULL, "Int Mic"},
>   	{"DMIC L1", NULL, "Int Mic"},
>   	{"DMIC R1", NULL, "Int Mic"},
> ...
> 	{"Int Mic", NULL, "micbias2"},
> 
> Since the analog mic is currently not working anyways, maybe we should
> use Int Mic2 for the analog mic, so make the above:

Do you mean the analog mic doesn't work with above change?
Could you dump registers for me?

> 
> 	{"IN2P", NULL, "Int Mic2"},
> 	{"IN2N", NULL, "Int Mic2"},
>   	{"DMIC L1", NULL, "Int Mic"},
>   	{"DMIC R1", NULL, "Int Mic"},
> ...
> 	{"Int Mic2", NULL, "micbias2"},
> 
> And then use
> 
> 	cset "name='Int Mic Switch2' on"

It will be cset "name='Int Mic2 Switch' on"
And you will also need to add "Int Mic2" in cht_mc_controls[].

> 
> In the ucm file in the analog mic enable sequence?
> 
> This way the already working dmic support stays unchanged and the
> analog mic support I'm adding does not enable micbias2 when using
> dmic inputs.

If you are using dmic inputs, you will need to set below switches on
"Sto1 ADC MIXL ADC2 Switch"
"Sto1 ADC MIXR ADC2 Switch"
And below switches are for analog mics
"Sto1 ADC MIXL ADC1 Switch"
"Sto1 ADC MIXR ADC1 Switch"
So you can select dmic or amic by rt5645's mixer.
But, anyway it's a good idea to add a new widget for analog mic.
However, it is better to have a more specific name for it.
Something like "Int A Mic" and "Int D Mic".

> 
> ?
> 
> Regards,
> 
> Hans
> 
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