[PATCH AUTOSEL 6.1 09/19] ALSA: usb-audio: Fix microphone sound on Opencomm2 Headset

From: Sasha Levin
Date: Wed Oct 18 2023 - 10:15:56 EST


From: WhaleChang <whalechang@xxxxxxxxxx>

[ Upstream commit 6a83d6f3bb3c329a73e3483651fb77b78bac1878 ]

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 <whalechang@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20231006044852.4181022-1-whalechang@xxxxxxxxxx
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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 4667d543f7481..80ee3b54bfe9c 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -1992,7 +1992,11 @@ 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;
}
}

--
2.40.1