ALSA: usb-audio: scarlett2: Add speaker switching support

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The 18i8 and 18i20 Gen 3 support "speaker switching". Add a Speaker
Switch control which can be set to Off/Main/Alt.

When speaker switching is enabled or disabled, the interface may
change the state of the Analog Outputs 3 and 4 routing and the global
mute button, so use a flag private->speaker_switching_switched to note
that those should be checked when the next "monitor other"
notification is received.

Signed-off-by: Geoffrey D. Bennett <g@b4.vu>
Link: https://lore.kernel.org/r/874193a534cd0aeb6f2e108ae761cadd2dc25ad2.1624379707.git.g@b4.vu
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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Geoffrey D. Bennett 2021-06-23 02:33:58 +09:30 • committed by Takashi Iwai

parent 8df25eb0a2

commit e914d8432c

1 changed files with 241 additions and 7 deletions

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sound/usb/mixer_scarlett_gen2.c

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