[PATCH 5.4 28/85] ALSA: usb-audio: Add implicit feedback quirk for MODX

[Greg Kroah-Hartman]

From: Geoffrey D. Bennett <g@xxxxx>

commit 26201ddc1373c99b2a67c5774da2f0eecd749b93 upstream.

This patch fixes audio distortion on playback for the Yamaha MODX.

Signed-off-by: Geoffrey D. Bennett <g@xxxxx>
Tested-by: Frank Slotta <frank.slotta@xxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20201104120705.GA19126@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
@@ -333,6 +333,7 @@ static int set_sync_ep_implicit_fb_quirk
 		ifnum = 2;
 		goto add_sync_ep_from_ifnum;
 	case USB_ID(0x2466, 0x8003): /* Fractal Audio Axe-Fx II */
+	case USB_ID(0x0499, 0x172a): /* Yamaha MODX */
 		ep = 0x86;
 		ifnum = 2;
 		goto add_sync_ep_from_ifnum;