[PATCH 6.1 018/131] ALSA: usb-audio: Fix microphone sound on Opencomm2 Headset

Greg Kroah-Hartman
2023-10-16T08:52:31Z

From: WhaleChang <whalechang@google.com>

commit 6a83d6f3bb3c329a73e3483651fb77b78bac1878 upstream.

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@google.com>
Link: https://lore.kernel.org/r/20231006044852.4181022-1-whalechang@google.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
sound/usb/quirks.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -1992,7 +1992,11 @@ void snd_usb_audioformat_attributes_quir
/* 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;
}
}