ALSA: usb-audio: scarlett2: Add mute support

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For each analogue output, in addition to the output volume (gain)
control, the hardware also has a mute control. Add ALSA mute controls
for each analogue output.

If the device has the line_out_hw_vol feature, then the mute control
is disabled along with the output volume control when the switch is
set to HW.

Signed-off-by: Geoffrey D. Bennett <g@b4.vu>
Link: https://lore.kernel.org/r/6fad82174b44633e46cfd96332a038de74d544f2.1624294591.git.g@b4.vu
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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Geoffrey D. Bennett 2021-06-22 03:39:39 +09:30 • committed by Takashi Iwai

parent 06250c89d4

commit 0c88f9db19

1 changed files with 145 additions and 25 deletions

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sound/usb/mixer_scarlett_gen2.c

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