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Subject[PATCH 4.19 34/71] ALSA: usb-audio: Add implicit feedback quirk for Qu-16
Date
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
@@ -334,6 +334,7 @@ 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;
ifnum = 3;
goto add_sync_ep_from_ifnum;

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