Commit 6a83d6f3 authored by WhaleChang's avatar WhaleChang Committed by Takashi Iwai
Browse files

ALSA: usb-audio: Fix microphone sound on Opencomm2 Headset 



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: default avatarWhaleChang <whalechang@google.com>
Link: https://lore.kernel.org/r/20231006044852.4181022-1-whalechang@google.com


Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 5d542b85

sound/usb/quirks.c

+5 −1
Original line number Diff line number Diff line
@@ -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;

	}

}