[PATCH 4/4] ALSA: usb-audio: Fix popping noise on Valeton GP-200

[Zhang Heng]

The Valeton GP-200 guitar multi-effects processor exhibits a continuous
popping noise (~6Hz) during playback and recording. Force implicit
feedback to resolve the issue.

Closes: https://bugzilla.kernel.org/show_bug.cgi?id=221662
Signed-off-by: Zhang Heng <zhangheng@xxxxxxxxxx>
---
 sound/usb/quirks.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index 6087daee939d..00b686a6c25b 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -2532,6 +2532,8 @@ static const struct usb_audio_quirk_flags_table quirk_flags_table[] = {
 		   QUIRK_FLAG_ALIGN_TRANSFER),
 	DEVICE_FLG(0x534d, 0x2109, /* MacroSilicon MS2109 */
 		   QUIRK_FLAG_ALIGN_TRANSFER),
+	DEVICE_FLG(0x84ef, 0x002a, /* Valeton GP-200 */
+		   QUIRK_FLAG_GENERIC_IMPLICIT_FB),
 	DEVICE_FLG(0x84ef, 0x0082, /* Hotone Audio Pulze Mini */
 		   QUIRK_FLAG_MIXER_PLAYBACK_LINEAR_VOL | QUIRK_FLAG_MIXER_CAPTURE_LINEAR_VOL),
 
-- 
2.25.1