linux-kernel - [PATCH AUTOSEL 5.15 05/14] ALSA: usb-audio: Fix microphone sound on Opencomm2 Headset

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Message-Id: <20231018141416.1335165-5-sashal@kernel.org>
Date:   Wed, 18 Oct 2023 10:14:05 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     WhaleChang <whalechang@...gle.com>, Takashi Iwai <tiwai@...e.de>,
        Sasha Levin <sashal@...nel.org>, perex@...ex.cz,
        tiwai@...e.com, jussi@...arnerd.net, aichao@...inos.cn,
        ltyl@...-e.com, john@...ping.me.uk, alsa-devel@...a-project.org
Subject: [PATCH AUTOSEL 5.15 05/14] ALSA: usb-audio: Fix microphone sound on Opencomm2 Headset

From: WhaleChang <whalechang@...gle.com>

[ 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@...gle.com>
Link: https://lore.kernel.org/r/20231006044852.4181022-1-whalechang@google.com
Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 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 8de572e774ddc..6d87f58d1b005 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -1725,7 +1725,11 @@ 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