Re: [PATCH 0/2] ALSA: usb-audio: second configuration of the Steinberg UR22C

[Takashi Iwai]

On Sun, 08 Nov 2026 14:03:01 +0100,
Xinyu Wei wrote:
> 
> The Steinberg UR22C exposes two USB configurations: configuration 1 is
> class-compliant (2 playback / 4 capture channels), while configuration 2
> is UAC2 behind bInterfaceClass 0xFF (6 playback / 8 capture channels and
> two MIDI interfaces).  Selecting configuration 2 on a stock kernel leaves
> interfaces 0-2 unbound and registers no PCM.
> 
> Patch 1 adds a composite quirk entry for configuration 2's vendor-class
> interfaces.  Patch 2 fixes a bogus bmFormats (0xffffffff) in
> configuration 2's capture descriptor so opening capture as FLOAT_LE does
> not lock out playback via implicit feedback sync.
> 
> Xinyu Wei (2):
>   ALSA: usb-audio: name the interfaces of the Steinberg UR22C
>   ALSA: usb-audio: fix the format bits of the Steinberg UR22C

Applied both to for-next branch now.  Thanks.


Takashi