[PATCH 4.9 097/117] ALSA: usb-audio: Add implicit feedback quirk for Qu-16

From: Greg Kroah-Hartman
Date: Mon Nov 09 2020 - 08:37:34 EST


From: Geoffrey D. Bennett <g@xxxxx>

commit 0938ecae432e7ac8b01080c35dd81d50a1e43033 upstream.

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

Signed-off-by: Geoffrey D. Bennett <g@xxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20201104115717.GA19046@xxxxx
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
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);