Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, "Geoffrey D. Bennett" <g@b4.vu>,
        Takashi Iwai <tiwai@suse.de>
Subject: [PATCH 4.9 097/117] ALSA: usb-audio: Add implicit feedback quirk for Qu-16
Date:   Mon,  9 Nov 2020 13:55:23 +0100
Message-Id: <20201109125030.307505870@linuxfoundation.org>
In-Reply-To: <20201109125025.630721781@linuxfoundation.org>
References: <20201109125025.630721781@linuxfoundation.org>
User-Agent: quilt/0.66
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Precedence: bulk

From: Geoffrey D. Bennett <g@b4.vu>

commit 0938ecae432e7ac8b01080c35dd81d50a1e43033 upstream.

This patch fixes audio distortion on playback for the Allen&Heath
Qu-16.

Signed-off-by: Geoffrey D. Bennett <g@b4.vu>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20201104115717.GA19046@b4.vu
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 sound/usb/pcm.c |    1 +
 1 file changed, 1 insertion(+)

--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -332,6 +332,7 @@ static int set_sync_ep_implicit_fb_quirk
 	switch (subs->stream->chip->usb_id) {
 	case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */
 	case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C600 */
+	case USB_ID(0x22f0, 0x0006): /* Allen&Heath Qu-16 */
 		ep = 0x81;
 		iface = usb_ifnum_to_if(dev, 3);