snd-rn-pci-acp3x - auto dmic detection unreliable

[Mukunda,Vijendar]

On 07/12/20 2:22 pm, Jaroslav Kysela wrote:
> Dne 18. 11. 20 v 10:25 Mukunda, Vijendar napsal(a):
>> [AMD Public Use]
> 
> AMD: You just replicated my original question without any answer (2 weeks+).
> Do you have something to share or do you not support your code?

We are already provided reply on 18th Nov.

_WOV integer value should be set only when DMIC is connected to APU.
When DMIC is not connected to APU,  _WOV integer value should be set to 
zero by BIOS.

  DMIC doesn't had auto presence detect logic on AMD platforms and DMIC 
connection to AMD platform is simple wiring.
Whether DMIC connected to APU or HDAUDIO codec can be decided by ODMs.

ODM BIOS has update the _WOV method value based on DMIC connected to APU 
or not.

-
Vijendar



> 
> 				Jaroslav
> 
>> -----Original Message-----
>> From: Jaroslav Kysela <perex at perex.cz>
>> Sent: Wednesday, November 18, 2020 2:37 PM
>> To: Mukunda, Vijendar <Vijendar.Mukunda at amd.com>
>> Cc: ALSA development <alsa-devel at alsa-project.org>
>> Subject: snd-rn-pci-acp3x - auto dmic detection unreliable
>>
>> Hi,
>>
>> 	it seems that the ACPI auto-detection of the presence the digital microphone connected to AMD Renoir audio bridge is unreliable. It may be that hardware vendors do not provide the correct ACPI tables.
>> 	Could you clarify the usage of _WOV integer value? It seems that this value is set on those plaforms which do not have the digital microphone (the microphone is connected to the HDA codec):
>>
>> _WOV integer value should be set only when DMIC is connected to APU.
>> When DMIC is not available, _WOV integer value should be set to zero by BIOS.

We are using
>>
>> Lenovo IdeaPad 5 (15ARE05)
>> Lenovo Thinkpad X395
>>
>> 	In any case, we should probably improve the auto-detection using DMI or other platform info.
>>
>> 					Jaroslav
>>
>> BugLink: https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugzilla.redhat.com%2Fshow_bug.cgi%3Fid%3D1892115&data=04%7C01%7CVijendar.Mukunda%40amd.com%7C99b9a10b76674aa6a28a08d89a8d75fc%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637429279661047562%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=CpZLrKf4pVdN6MmnmWUnXCLevFjySGuFW%2BJeLoYW%2BjQ%3D&reserved=0
>>
>> --
>> Jaroslav Kysela <perex at perex.cz>
>> Linux Sound Maintainer; ALSA Project; Red Hat, Inc.
>>
> 
>