[PATCH 5.4 042/178] ALSA: usb-audio: Add implicit feedback quirk for SSL2+.

[Sasha Levin]

From: Laurence Tratt <laurie@xxxxxxxxx>

commit e7585db1b0b5b4e4eb1967bb1472df308f7ffcbf upstream.

This uses the same quirk as the Motu M2 and M4 to ensure the driver uses the
audio interface's clock. Tested on an SSL2+.

Signed-off-by: Laurence Tratt <laurie@xxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20200612111807.dgnig6rwhmsl2bod@xxxxxxxxxxxxxxxxxxx
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(+)

diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index c36e6c97d09ae..b971d9aaa64a0 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -349,6 +349,7 @@ static int set_sync_ep_implicit_fb_quirk(struct snd_usb_substream *subs,
 		ifnum = 0;
 		goto add_sync_ep_from_ifnum;
 	case USB_ID(0x07fd, 0x0008): /* MOTU M Series */
+	case USB_ID(0x31e9, 0x0002): /* Solid State Logic SSL2+ */
 		ep = 0x81;
 		ifnum = 2;
 		goto add_sync_ep_from_ifnum;
-- 
2.25.1