| SND_CTL_ADD_SLAVE_UN(9) | Control/Mixer API | SND_CTL_ADD_SLAVE_UN(9) |
NAME¶
snd_ctl_add_slave_uncached - Add a virtual slave control
SYNOPSIS¶
int snd_ctl_add_slave_uncached(struct snd_kcontrol * master, struct snd_kcontrol * slave);
ARGUMENTS¶
master
vmaster element
slave
slave element to add
DESCRIPTION¶
Add a virtual slave control to the given master. Unlike snd_ctl_add_slave, the element added via this function is supposed to have volatile values, and get callback is called at each time queried from the master.
When the control peeks the hardware values directly and the value can be changed by other means than the put callback of the element, this function should be used to keep the value always up-to-date.
RETURN¶
Zero if successful or a negative error code.
COPYRIGHT¶
| June 2024 | Kernel Hackers Manual 3.10 |