ALSA: usb-audio: Avoid implicit feedback mode on DIYINHK USB Audio 2.0

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[ Upstream commit c5bf24c8ab ]

Although DIYINHK USB Audio 2.0 (ID 20b1:2009) shows the implicit
feedback source for the capture stream, this would cause several
problems for the playback.  Namely, the device can get wMaxPackSize
1024 for 24/32 bit format with 6 channels, and when a high sample rate
like 352.8kHz or 384kHz is played, the packet size overflows the max
limit.  Also, the device has another two playback altsets, and those
aren't properly handled with the implicit feedback.

Since the device has been working well even before introducing the
implicit feedback, we can assume that it works fine in the async mode.
This patch adds the explicit skip of the implicit fb detection to make
the playback running in the async mode.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=221076
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20260225085233.316306-4-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Takashi Iwai 2026-02-25 09:52:30 +01:00 • committed by Greg Kroah-Hartman

parent 5faf0ce7d7

commit 716fc40446

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sound/usb/quirks.c

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