USB-Audio: Dell-WD15-Dock: make input and output volume adjustable

[GitHub pull_request - opened]

alsa-project/alsa-ucm-conf pull request #47 was opened from jason77-wang:

Recently we found the input volume is too low for some specific
headset-mic, even we adjust the input volume to max from PA, we still
can't record the sound from that headset-mic. That is because we
change the input or output volume from PA, but the mixer's volume
is not changed, only PA's soft-volume is changed.

Checking the amixer controls for this sound card, it supports
MixerElem, Volume and Switch, So adding them in the ucm.

Signed-off-by: Hui Wang <hui.wang at canonical.com>

Request URL   : https://github.com/alsa-project/alsa-ucm-conf/pull/47
Patch URL     : https://github.com/alsa-project/alsa-ucm-conf/pull/47.patch
Repository URL: https://github.com/alsa-project/alsa-ucm-conf