From: WhaleChang whalechang@google.com

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 ---

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; } }