2023-10-06 04:49:19

by Whale Chang

Subject: [PATCH] ALSA: usb-audio: Fix microphone sound on Opencomm2 Headset

From: WhaleChang <[email protected]>

When a Opencomm2 Headset is connected to a Bluetooth USB dongle,
the audio playback functions properly, but the microphone does not work.

In the dmesg logs, there are messages indicating that the init_pitch
function fails when the capture process begins.

The microphone only functions when the ep pitch control is not set.

Toggling the pitch control off bypasses the init_piatch function
and allows the microphone to work.

Signed-off-by: WhaleChang <[email protected]>
---

sound/usb/quirks.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index 598659d761cc..d4bbef70d2f7 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -1994,7 +1994,11 @@ void snd_usb_audioformat_attributes_quirk(struct snd_usb_audio *chip,
/* mic works only when ep packet size is set to wMaxPacketSize */
fp->attributes |= UAC_EP_CS_ATTR_FILL_MAX;
break;
-
+ case USB_ID(0x3511, 0x2b1e): /* Opencomm2 UC USB Bluetooth dongle */
+ /* mic works only when ep pitch control is not set */
+ if (stream == SNDRV_PCM_STREAM_CAPTURE)
+ fp->attributes &= ~UAC_EP_CS_ATTR_PITCH_CONTROL;
+ break;
}
}

--
2.42.0.609.gbb76f46606-goog

2023-10-06 09:09:31

by Takashi Iwai

Subject: Re: [PATCH] ALSA: usb-audio: Fix microphone sound on Opencomm2 Headset

On Fri, 06 Oct 2023 06:48:49 +0200,
Whale Chang wrote:
>
> From: WhaleChang <[email protected]>
>
> When a Opencomm2 Headset is connected to a Bluetooth USB dongle,
> the audio playback functions properly, but the microphone does not work.
>
> In the dmesg logs, there are messages indicating that the init_pitch
> function fails when the capture process begins.
>
> The microphone only functions when the ep pitch control is not set.
>
> Toggling the pitch control off bypasses the init_piatch function
> and allows the microphone to work.
>
> Signed-off-by: WhaleChang <[email protected]>

Thanks, applied now.


Takashi