linux-kernel - Re: [PATCH V2] ALSA: hda/conexant: Fix headset auto detect fail in cx8070 and SN6140

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Date: Mon, 08 Jan 2024 14:08:58 +0100
From: Takashi Iwai <tiwai@...e.de>
To: bo liu <bo.liu@...arytech.com>
Cc: perex@...ex.cz,
	tiwai@...e.com,
	linux-sound@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH V2] ALSA: hda/conexant: Fix headset auto detect fail in cx8070 and SN6140

On Mon, 08 Jan 2024 12:02:35 +0100,
bo liu wrote:
> 
> When OMTP headset plugin the headset jack of CX8070 and SN6160 sound cards,
> the headset type detection circuit will recognize the headset type as CTIA.
> At this point, plugout and plugin the headset will get the correct headset
> type as OMTP.
> The reason for the failure of headset type recognition is that the sound
> card creation will enable the VREF voltage of the headset mic, which
> interferes with the headset type automatic detection circuit. Plugout and
> plugin the headset will restart the headset detection and get the correct
> headset type.
> The patch is disable the VREF voltage when the headset is not present, and
> will enable the VREF voltage when the headset is present.
> 
> Signed-off-by: bo liu <bo.liu@...arytech.com>

Thanks, applied now.


Takashi