ALSA: usb-audio: Workarounds for Behringer UMC 204/404 HD
authorTakashi Iwai <tiwai@suse.de>
Fri, 24 Jun 2022 10:11:32 +0000 (12:11 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 12 Jul 2022 14:34:48 +0000 (16:34 +0200)
commitf62c53c6e70d42aada4e1dd04f506821d51beee0
tree8c06cd2e590d461086695d689a444b514dfde33d
parente63b94b8dd5ffeb9f8af615e9a6f52be44b9d237
ALSA: usb-audio: Workarounds for Behringer UMC 204/404 HD

commit ae8b1631561a3634cc09d0c62bbdd938eade05ec upstream.

Both Behringer UMC 202 HD and 404 HD need explicit quirks to enable
the implicit feedback mode and start the playback stream primarily.
The former seems fixing the stuttering and the latter is required for
a playback-only case.

Note that the "clock source 41 is not valid" error message still
appears even after this fix, but it should be only once at probe.
The reason of the error is still unknown, but this seems to be mostly
harmless as it's a one-off error and the driver retires the clock
setup and it succeeds afterwards.

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=215934
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20220624101132.14528-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
sound/usb/quirks.c