ALSA: usb-audio: Add QUIRK_FLAG_SKIP_IFACE_SETUP

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[ Upstream commit 38c322068a ]

Add a quirk flag to skip the usb_set_interface(),
snd_usb_init_pitch(), and snd_usb_init_sample_rate() calls in
__snd_usb_parse_audio_interface(). These are redundant with
snd_usb_endpoint_prepare() at stream-open time.

Enable the quirk for Focusrite devices, as init_sample_rate(rate_max)
sets 192kHz during probing, which disables the internal mixer and Air
and Safe modes.

Fixes: 16f1f83844 ("Revert "ALSA: usb-audio: Drop superfluous interface setup at parsing"")
Signed-off-by: Geoffrey D. Bennett <g@b4.vu>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/65a7909b15f9feb76c2a6f4f8814c240ddc50737.1771594828.git.g@b4.vu
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Geoffrey D. Bennett 2026-02-21 02:36:35 +10:30 • committed by Sasha Levin

parent 71f72c5d74

commit ddbbdebeee

3 changed files with 11 additions and 1 deletions

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3

sound/usb/quirks.c

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3

sound/usb/stream.c

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6

sound/usb/usbaudio.h

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