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linux/sound
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Geoffrey D. Bennett 0d58273be0 ALSA: usb-audio: Skip clock selector for Focusrite devices 
Add QUIRK_FLAG_SKIP_CLOCK_SELECTOR for Focusrite devices.

During interface parsing, snd_usb_clock_find_source() reads the clock
selector value then writes it back unchanged. On Focusrite devices
this redundant write results in a ~300ms delay per altsetting, adding
~1.8s to probe time on a typical device with 6 altsettings.

Enabling SKIP_CLOCK_SELECTOR skips the redundant write-back.

Signed-off-by: Geoffrey D. Bennett <g@b4.vu>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/00e53ae0a508b41516b41833daa17823381a649c.1771594828.git.g@b4.vu
2026-02-23 09:57:10 +01:00
..
ac97 Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
aoa Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
arm ASoC: ac97: Convert to GPIO descriptors 2026-01-27 12:45:57 +00:00
atmel ALSA: atmel: Use guard() for mutex locks 2025-09-01 13:54:28 +02:00
core Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses 2026-02-22 08:26:33 -08:00
drivers Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
firewire Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses 2026-02-22 08:26:33 -08:00
hda ALSA: hda/realtek: add quirk for Samsung Galaxy Book Flex (NT950QCT-A38A) 2026-02-23 09:54:43 +01:00
i2c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
isa Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
mips Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
oss ALSA: echoaudio: Add SPDX ids to some files 2026-02-18 08:57:38 +01:00
parisc Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
pci Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses 2026-02-22 08:26:33 -08:00
pcmcia Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
ppc Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
sh Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
soc Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses 2026-02-22 08:26:33 -08:00
sparc ALSA: sparc/dbri: Use guard() for spin locks 2025-09-10 13:20:01 +02:00
spi ALSA: spi/at73c213: Use guard() for spin locks 2025-09-17 14:07:02 +02:00
synth Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses 2026-02-22 08:26:33 -08:00
usb ALSA: usb-audio: Skip clock selector for Focusrite devices 2026-02-23 09:57:10 +01:00
virtio Convert 'alloc_flex' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
x86 Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
xen Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses 2026-02-22 08:26:33 -08:00
ac97_bus.c ALSA: ac97: Fix kernel-doc warning for snd_ac97_reset 2025-11-06 10:52:43 +01:00
Kconfig sound: Make CONFIG_SND depend on INDIRECT_IOMEM instead of UML 2024-10-10 16:11:18 +02:00
last.c
Makefile
sound_core.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00