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)
committerTakashi Iwai <tiwai@suse.de>
Fri, 24 Jun 2022 10:12:17 +0000 (12:12 +0200)
commitae8b1631561a3634cc09d0c62bbdd938eade05ec
tree47ab2453a287599e185daafb6b0147fed41a1e5a
parent627ce0d68eb4b53e995b08089fa9da1e513ec5ba
ALSA: usb-audio: Workarounds for Behringer UMC 204/404 HD

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>
sound/usb/quirks.c