SND_CTL_ACTIVATE_ID(9) Sound Devices SND_CTL_ACTIVATE_ID(9)NAMEsnd_ctl_activate_id - activate/inactivate the control of the given id
SYNOPSIS
int snd_ctl_activate_id(struct snd_card * card,
struct snd_ctl_elem_id * id, int active);
ARGUMENTS
card
the card instance
id
the control id to activate/inactivate
active
non-zero to activate
DESCRIPTION
Finds the control instance with the given id, and activate or
inactivate the control together with notification, if changed.
RETURN
0 if unchanged, 1 if changed, or a negative error code on failure.
COPYRIGHTKernel Hackers Manual 3.11 November 2013 SND_CTL_ACTIVATE_ID(9)