From: Takashi Iwai <tiwai@suse.de>
To: Xinyu Wei <xinyuwei1024@gmail.com>
Cc: Jaroslav Kysela <perex@perex.cz>,
linux-kernel@vger.kernel.org, linux-sound@vger.kernel.org,
Takashi Iwai <tiwai@suse.com>
Subject: Re: [PATCH 0/2] ALSA: usb-audio: second configuration of the Steinberg UR22C
Date: Mon, 09 Nov 2026 15:08:30 +0100 [thread overview]
Message-ID: <87se1aumg1.wl-tiwai@suse.de> (raw)
In-Reply-To: <20261108130303.387288-1-xinyuwei1024@gmail.com>
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
prev parent reply other threads:[~2026-11-09 14:08 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-08 13:03 [PATCH 0/2] ALSA: usb-audio: second configuration of the Steinberg UR22C Xinyu Wei
2026-11-08 13:03 ` [PATCH 1/2] ALSA: usb-audio: name the interfaces " Xinyu Wei
2026-11-08 13:03 ` [PATCH 2/2] ALSA: usb-audio: fix the format bits " Xinyu Wei
2026-11-09 14:08 ` Takashi Iwai [this message]
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