Re: [PATCH] ALSA: hda/conexant: Set mic pin VREF to 0x24 on headset mic plug

[songxiebing]

Hi Takashi,

Yes, reading these registers is just to print out debugging information
for problem analysis.

>On Tue, 25 Aug 2026 11:13:03 +0200,
>songxiebing wrote:
>>
>> Hi Takashi,
>>
>> 0x19 is configured as a mic pin, in cx_update_headset_mic_vref, it
>> executes cx_process_headset_plugin only after confirming that a mic
>> present is detected. A 4-pole headset is detected as either CTIA or
>> OMTP and sets 0x24, but the 3-pole mic case is not handled, so a
>> setting of 0x24 is added here.
>
>OK, then you'd need to explain more in the patch description.
>It implies that the patch corrects the debug output, too.
>
>And, this also opens another door: why do we read those registers at
>all?  Now you always set the pin control 0x24 no matter what the
>connection type is.  So the whole headset type detection becomes
>practically moot; it's used only for showing a debug print.
>
>
>thanks,
>
>Takashi