From: Geoffrey D. Bennett <g@b4.vu>
Date: Wed, 4 Nov 2020 12:07:05 +0000 (+1030)
Subject: ALSA: usb-audio: Add implicit feedback quirk for MODX
X-Git-Tag: perf-urgent-2020-11-08~6^2~2
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=26201ddc1373c99b2a67c5774da2f0eecd749b93;p=users%2Fdwmw2%2Flinux.git

ALSA: usb-audio: Add implicit feedback quirk for MODX

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

Signed-off-by: Geoffrey D. Bennett <g@b4.vu>
Tested-by: Frank Slotta <frank.slotta@posteo.de>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20201104120705.GA19126@b4.vu
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---

diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index 31b1edf53c417..7227ccb7e57e9 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -345,6 +345,7 @@ static int set_sync_ep_implicit_fb_quirk(struct snd_usb_substream *subs,
 		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;