Internal microphone does not work with 5.12 (Tiger Lake, X1 Nano)

[Nico Schottelius]

Hey Kai,
Kai Vehmanen <kai.vehmanen at linux.intel.com> writes:

> Hi Nico,
>
> On Thu, 27 May 2021, Nico Schottelius wrote:
>
>> Just checked, it was disabled. I rebuilt 5.12.6, rebooted, but now the
>> sound card is gone (no device files in /dev/snd anymore), proably
>> failing due to:
>>
>> [   55.713668] snd_hda_intel 0000:00:1f.3: DSP detected with PCI class/subclass/prog-if info 0x040380
>> [   55.713679] snd_hda_intel 0000:00:1f.3: Digital mics found on Skylake+ platform, using SOF driver
>> [   55.745863] sof-audio-pci-intel-tgl 0000:00:1f.3: DSP detected with PCI class/subclass/prog-if info 0x040380
>> [   55.745872] sof-audio-pci-intel-tgl 0000:00:1f.3: Digital mics found on Skylake+ platform, using SOF driver
>> [   55.746033] sof-audio-pci-intel-tgl 0000:00:1f.3: DSP detected with PCI class/subclass/prog-if 0x040380
>> [   55.748315] sof-audio-pci-intel-tgl 0000:00:1f.3: use msi interrupt mode
>> [   55.752671] sof-audio-pci-intel-tgl 0000:00:1f.3: warning: No matching ASoC machine driver found
>> [   55.752673] sof-audio-pci-intel-tgl 0000:00:1f.3: error: no matching ASoC machine driver found - aborting probe
>> [   55.752673] sof-audio-pci-intel-tgl 0000:00:1f.3: error: failed to get machine info -19
>> [   55.752764] sof-audio-pci-intel-tgl 0000:00:1f.3: error: failed to probe DSP hardware!
>
> it seems more kernel config options are missing. Distribution kernels
> typically enable all the machine drivers, but you are specifically missing
> CONFIG_SND_SOC_INTEL_SKL_HDA_DSP_GENERIC_MACH=m

I've enabled this one and all machine types and indeed the card is being
recognised (report at
http://alsa-project.org/db/?f=5cbe7c293cbb80ab548b892cfc8b991476b0b2aa).
I checked permissions on /dev/snd, which looks good.

However, obs does not list the microphone at all and
chromium / jitsi shows the snd-hda-dsp mic, however does not let me
select it.

So with above options:

- playback works
- microphone does not work

> Distribution kernels are a good reference when building on your own, and
> we in SOF also maintain example kconfig settings for typical systems.
> Here's the bit for systems with DSP and HDA codecs:
> https://github.com/thesofproject/kconfig/blob/master/hdaudio-codecs-defconfig

I have used the .config from the linux-edge kernel from Alpine Linux as
a basis. The above configuration looks to be enabled in my .config as well.

Alpine's default config might include a bit less options than other
distros, I am currently in touch with the developers there for patching
it, as soon as I got the sound card properly working.

Best,

Nico

--
Sustainable and modern Infrastructures by ungleich.ch