Clock sync problem?

[Takashi Iwai]

On Wed, 10 Jun 2020 18:29:12 +0200,
Laurence Tratt wrote:
> 
> 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!

Great, care to submit the patch in a proper format?

> [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.]

Yes, the addition can be done easily at any time, so let's take the
known working one at first.


thanks,

Takashi

> 
> 
> 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;
>