ALSA: usb-audio: Skip volume controls triggers hangup on Dell USB Dock

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commit adcdd0d5a1 upstream.

This is Dell usb dock audio workaround.
It was fixed the master volume keep lower.

[Some background: the patch essentially skips the controls of a couple
 of FU volumes.  Although the firmware exposes the dB and the value
 information via the usb descriptor, changing the values (we set the
 min volume as default) screws up the device.  Although this has been
 fixed in the newer firmware, the devices are shipped with the old
 firmware, thus we need the workaround in the driver side.  -- tiwai]

Signed-off-by: Kailang Yang <kailang@realtek.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
[bwh: Backported to 3.16: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

...

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Kailang Yang 2016-04-12 10:55:03 +08:00 • committed by Ben Hutchings

parent 65ed9de4d9

commit 0589641bc4

1 changed files with 14 additions and 0 deletions

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sound/usb/mixer_maps.c

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