ALSA: usb-audio: Add boot quirk for Behringer CM1A

Browse source

After a power cycle and reenumeration, the Behringer CM1A* leaves its
MIDI endpoint inoperative. USB enumeration and driver binding
complete successfully, but MIDI outputs remain pending.

A GET_DESCRIPTOR request for the device descriptor, issued after USB
configuration, makes the endpoint operational. Add a one time boot quirk
to perform that request before ALSA initializes the device.

*
ID 1397:1234 BEHRINGER International GmbH CM1A

Signed-off-by: Sebastian Dalfuß <sd@sedf.de>
Link: https://patch.msgid.link/apwG4DRfNyvmRzyb@sedf.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

...

This commit is contained in:

Sebastian Dalfuß 2026-09-05 14:11:12 +02:00 • committed by Takashi Iwai

parent 12cba0ce11

commit 45b5beb60b

1 changed files with 23 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

23

sound/usb/quirks.c

View file