Clock sync problem?

[Laurence Tratt]

On Wed, Jun 10, 2020 at 04:49:14PM +0300, Alexander Tsoy wrote:

Hello Alexander,

> Thanks! So SSL 2+ is indeed currently needs implicit feedback quirk.
> The question is why it didn't help in your case.

It didn't work because I was an idiot and used the wrong manufacturer ID.
When I fixed that typo, the drift disappeared. Patch attached!

[It's reasonable to assume that this will also work for the SSL2, but I
don't know its ID: it might use the same ID as the SSL2+ or perhaps its
0x0001. Unfortunately I suspect we'll have to wait until one is observed in
the wild to know.]


Laurie


diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index 8a05dcb134..abf726c49f 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -367,6 +367,7 @@ 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;