[BUG] Roland VS-100 not working, (possible) regression in snd_usb_audio

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Hello, first post in this list. I'm not sure if this is the right place to
fill a bug report.

The issue I encountered is on a Roland VS-100, an hi-end interface similar
to VS-20:

https://www.roland.com/global/products/v-studio_100/

it seems that snd_usb_audio module has broken the compatibility with the
VS-100 at around krnel 5.11 time. I have two alsa-info reports, on the same
desktop pc:

working (my current setup):
http://alsa-project.org/db/?f=a3378ecb0a258b4745827c693f4c0045fdb83847

non working (live):
http://alsa-project.org/db/?f=99bcdd5a60281110a93317d09a11b9f4831f9701

in the non working case the interface is recognised by "lsusb", it is seen
by "aconnect -l" but not by "aplay -l".

I'm willing to solve the issue and to help to the best of my possibilities
(if needed also by recompiling the kernel)

There is a long thread on linux musicians forum about this issue:
https://linuxmusicians.com/viewtopic.php?t=23883

Hope you guys can help.
thanks in advance,
Alberto

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<div dir=3D"ltr"><div>Hello, first post in this list. I&#39;m not sure if t=
his is the right place to fill a bug report.</div><div><br></div><div>The i=
ssue I encountered is on a Roland VS-100, an hi-end interface similar to VS=
-20:</div><div><br></div><div><a href=3D"https://www.roland.com/global/prod=
ucts/v-studio_100/">https://www.roland.com/global/products/v-studio_100/</a=
></div><div><br></div><div>it seems that snd_usb_audio module has broken th=
e compatibility with the VS-100 at around krnel 5.11 time. I have two alsa-=
info reports, on the same desktop pc:</div><div><br></div><div>working (my =
current setup):<br><a href=3D"http://alsa-project.org/db/?f=3Da3378ecb0a258=
b4745827c693f4c0045fdb83847">http://alsa-project.org/db/?f=3Da3378ecb0a258b=
4745827c693f4c0045fdb83847</a><br></div><div><br></div><div>non working (li=
ve):<br><a href=3D"http://alsa-project.org/db/?f=3D99bcdd5a60281110a93317d0=
9a11b9f4831f9701">http://alsa-project.org/db/?f=3D99bcdd5a60281110a93317d09=
a11b9f4831f9701</a>=C2=A0</div><div><br></div><div>in the non working case =
the interface is recognised by &quot;lsusb&quot;, it is seen by &quot;aconn=
ect -l&quot; but not by &quot;aplay -l&quot;.</div><div><br></div><div>I&#3=
9;m willing to solve the issue and to help to the best of my possibilities =
(if needed also by recompiling the kernel)<br></div><div><br></div><div>The=
re is a long thread on linux musicians forum about this issue:<br></div><di=
v><a href=3D"https://linuxmusicians.com/viewtopic.php?t=3D23883">https://li=
nuxmusicians.com/viewtopic.php?t=3D23883</a></div><div><br></div><div>Hope =
you guys can help.</div><div>thanks in advance,</div><div>Alberto<br></div>=
<div><br></div><div><br></div></div>

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