diff options
Diffstat (limited to 'include/sound/control.h')
| -rw-r--r-- | include/sound/control.h | 31 |
1 files changed, 28 insertions, 3 deletions
diff --git a/include/sound/control.h b/include/sound/control.h index cc3dcc6cfb0f..e07f6b960641 100644 --- a/include/sound/control.h +++ b/include/sound/control.h @@ -81,7 +81,7 @@ struct snd_kcontrol { unsigned long private_value; void *private_data; void (*private_free)(struct snd_kcontrol *kcontrol); - struct snd_kcontrol_volatile vd[]; /* volatile data */ + struct snd_kcontrol_volatile vd[] __counted_by(count); /* volatile data */ }; #define snd_kcontrol(n) list_entry(n, struct snd_kcontrol, list) @@ -140,8 +140,30 @@ int snd_ctl_remove_id(struct snd_card * card, struct snd_ctl_elem_id *id); int snd_ctl_rename_id(struct snd_card * card, struct snd_ctl_elem_id *src_id, struct snd_ctl_elem_id *dst_id); void snd_ctl_rename(struct snd_card *card, struct snd_kcontrol *kctl, const char *name); int snd_ctl_activate_id(struct snd_card *card, struct snd_ctl_elem_id *id, int active); -struct snd_kcontrol *snd_ctl_find_numid(struct snd_card * card, unsigned int numid); -struct snd_kcontrol *snd_ctl_find_id(struct snd_card * card, struct snd_ctl_elem_id *id); +struct snd_kcontrol *snd_ctl_find_numid(struct snd_card *card, unsigned int numid); +struct snd_kcontrol *snd_ctl_find_id(struct snd_card *card, const struct snd_ctl_elem_id *id); + +/** + * snd_ctl_find_id_mixer - find the control instance with the given name string + * @card: the card instance + * @name: the name string + * + * Finds the control instance with the given name and + * @SNDRV_CTL_ELEM_IFACE_MIXER. Other fields are set to zero. + * + * This is merely a wrapper to snd_ctl_find_id(). + * + * Return: The pointer of the instance if found, or %NULL if not. + */ +static inline struct snd_kcontrol * +snd_ctl_find_id_mixer(struct snd_card *card, const char *name) +{ + struct snd_ctl_elem_id id = {}; + + id.iface = SNDRV_CTL_ELEM_IFACE_MIXER; + strscpy(id.name, name, sizeof(id.name)); + return snd_ctl_find_id(card, &id); +} int snd_ctl_create(struct snd_card *card); @@ -238,6 +260,9 @@ snd_ctl_add_follower(struct snd_kcontrol *master, struct snd_kcontrol *follower) return _snd_ctl_add_follower(master, follower, 0); } +int snd_ctl_add_followers(struct snd_card *card, struct snd_kcontrol *master, + const char * const *list); + /** * snd_ctl_add_follower_uncached - Add a virtual follower control * @master: vmaster element |