*/
struct snd_kcontrol *snd_ctl_make_virtual_master(char *name,
const unsigned int *tlv);
-int snd_ctl_add_slave(struct snd_kcontrol *master, struct snd_kcontrol *slave);
-
+int _snd_ctl_add_slave(struct snd_kcontrol *master, struct snd_kcontrol *slave,
+ unsigned int flags);
+/* optional flags for slave */
+#define SND_CTL_SLAVE_NEED_UPDATE (1 << 0)
+
+static inline int
+snd_ctl_add_slave(struct snd_kcontrol *master, struct snd_kcontrol *slave)
+{
+ return _snd_ctl_add_slave(master, slave, 0);
+}
+
+static inline int
+snd_ctl_add_slave_uncached(struct snd_kcontrol *master,
+ struct snd_kcontrol *slave)
+{
+ return _snd_ctl_add_slave(master, slave, SND_CTL_SLAVE_NEED_UPDATE);
+}
+
#endif /* __SOUND_CONTROL_H */
struct link_master *master;
struct link_ctl_info info;
int vals[2]; /* current values */
+ unsigned int flags;
struct snd_kcontrol slave; /* the copy of original control entry */
};
+static int slave_update(struct link_slave *slave)
+{
+ struct snd_ctl_elem_value *uctl;
+ int err, ch;
+
+ uctl = kmalloc(sizeof(*uctl), GFP_KERNEL);
+ if (!uctl)
+ return -ENOMEM;
+ uctl->id = slave->slave.id;
+ err = slave->slave.get(&slave->slave, uctl);
+ for (ch = 0; ch < slave->info.count; ch++)
+ slave->vals[ch] = uctl->value.integer.value[ch];
+ kfree(uctl);
+ return 0;
+}
+
/* get the slave ctl info and save the initial values */
static int slave_init(struct link_slave *slave)
{
struct snd_ctl_elem_info *uinfo;
- struct snd_ctl_elem_value *uctl;
- int err, ch;
+ int err;
- if (slave->info.count)
- return 0; /* already initialized */
+ if (slave->info.count) {
+ /* already initialized */
+ if (slave->flags & SND_CTL_SLAVE_NEED_UPDATE)
+ return slave_update(slave);
+ return 0;
+ }
uinfo = kmalloc(sizeof(*uinfo), GFP_KERNEL);
if (!uinfo)
slave->info.max_val = uinfo->value.integer.max;
kfree(uinfo);
- uctl = kmalloc(sizeof(*uctl), GFP_KERNEL);
- if (!uctl)
- return -ENOMEM;
- uctl->id = slave->slave.id;
- err = slave->slave.get(&slave->slave, uctl);
- for (ch = 0; ch < slave->info.count; ch++)
- slave->vals[ch] = uctl->value.integer.value[ch];
- kfree(uctl);
- return 0;
+ return slave_update(slave);
}
/* initialize master volume */
* - logarithmic volume control (dB level), no linear volume
* - master can only attenuate the volume, no gain
*/
-int snd_ctl_add_slave(struct snd_kcontrol *master, struct snd_kcontrol *slave)
+int _snd_ctl_add_slave(struct snd_kcontrol *master, struct snd_kcontrol *slave,
+ unsigned int flags)
{
struct link_master *master_link = snd_kcontrol_chip(master);
struct link_slave *srec;
srec->slave = *slave;
memcpy(srec->slave.vd, slave->vd, slave->count * sizeof(*slave->vd));
srec->master = master_link;
+ srec->flags = flags;
/* override callbacks */
slave->info = slave_info;
list_add_tail(&srec->list, &master_link->slaves);
return 0;
}
-
-EXPORT_SYMBOL(snd_ctl_add_slave);
+EXPORT_SYMBOL(_snd_ctl_add_slave);
/*
* ctl callbacks for master controls
return kctl;
}
-
EXPORT_SYMBOL(snd_ctl_make_virtual_master);