aboutsummaryrefslogtreecommitdiffstats
path: root/sound/core
diff options
context:
space:
mode:
authorTakashi Iwai <tiwai@suse.de>2014-10-30 13:44:34 +0100
committerTakashi Iwai <tiwai@suse.de>2014-10-30 13:44:34 +0100
commit12cddbd8696657ff405e054be48747b906731698 (patch)
treef0b9293d6e2868801737e795d7e1ee1e8725cb60 /sound/core
parent438f4e2801d730442d6fc36ab2b265c4b54cff8b (diff)
ALSA: control: Add missing kerneldoc comments to exported functions
A few functions have no proper documentation yet, so let's add them. Along with it, remove superfluous blank line between the closing brace and EXPORT_SYMBOL() line. Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core')
-rw-r--r--sound/core/control.c64
1 files changed, 49 insertions, 15 deletions
diff --git a/sound/core/control.c b/sound/core/control.c
index 5c35bbaf881e..99aa3aa157ba 100644
--- a/sound/core/control.c
+++ b/sound/core/control.c
@@ -141,6 +141,16 @@ static int snd_ctl_release(struct inode *inode, struct file *file)
return 0;
}
+/**
+ * snd_ctl_notify - Send notification to user-space for a control change
+ * @card: the card to send notification
+ * @mask: the event mask, SNDRV_CTL_EVENT_*
+ * @id: the ctl element id to send notification
+ *
+ * This function adds an event record with the given id and mask, appends
+ * to the list and wakes up the user-space for notification. This can be
+ * called in the atomic context.
+ */
void snd_ctl_notify(struct snd_card *card, unsigned int mask,
struct snd_ctl_elem_id *id)
{
@@ -179,7 +189,6 @@ void snd_ctl_notify(struct snd_card *card, unsigned int mask,
}
read_unlock(&card->ctl_files_rwlock);
}
-
EXPORT_SYMBOL(snd_ctl_notify);
/**
@@ -261,7 +270,6 @@ struct snd_kcontrol *snd_ctl_new1(const struct snd_kcontrol_new *ncontrol,
kctl.private_data = private_data;
return snd_ctl_new(&kctl, access);
}
-
EXPORT_SYMBOL(snd_ctl_new1);
/**
@@ -280,7 +288,6 @@ void snd_ctl_free_one(struct snd_kcontrol *kcontrol)
kfree(kcontrol);
}
}
-
EXPORT_SYMBOL(snd_ctl_free_one);
static bool snd_ctl_remove_numid_conflict(struct snd_card *card,
@@ -376,7 +383,6 @@ int snd_ctl_add(struct snd_card *card, struct snd_kcontrol *kcontrol)
snd_ctl_free_one(kcontrol);
return err;
}
-
EXPORT_SYMBOL(snd_ctl_add);
/**
@@ -471,7 +477,6 @@ int snd_ctl_remove(struct snd_card *card, struct snd_kcontrol *kcontrol)
snd_ctl_free_one(kcontrol);
return 0;
}
-
EXPORT_SYMBOL(snd_ctl_remove);
/**
@@ -499,7 +504,6 @@ int snd_ctl_remove_id(struct snd_card *card, struct snd_ctl_elem_id *id)
up_write(&card->controls_rwsem);
return ret;
}
-
EXPORT_SYMBOL(snd_ctl_remove_id);
/**
@@ -617,7 +621,6 @@ int snd_ctl_rename_id(struct snd_card *card, struct snd_ctl_elem_id *src_id,
up_write(&card->controls_rwsem);
return 0;
}
-
EXPORT_SYMBOL(snd_ctl_rename_id);
/**
@@ -645,7 +648,6 @@ struct snd_kcontrol *snd_ctl_find_numid(struct snd_card *card, unsigned int numi
}
return NULL;
}
-
EXPORT_SYMBOL(snd_ctl_find_numid);
/**
@@ -687,7 +689,6 @@ struct snd_kcontrol *snd_ctl_find_id(struct snd_card *card,
}
return NULL;
}
-
EXPORT_SYMBOL(snd_ctl_find_id);
static int snd_ctl_card_info(struct snd_card *card, struct snd_ctl_file * ctl,
@@ -1526,19 +1527,28 @@ static int _snd_ctl_register_ioctl(snd_kctl_ioctl_func_t fcn, struct list_head *
return 0;
}
+/**
+ * snd_ctl_register_ioctl - register the device-specific control-ioctls
+ * @fcn: ioctl callback function
+ *
+ * called from each device manager like pcm.c, hwdep.c, etc.
+ */
int snd_ctl_register_ioctl(snd_kctl_ioctl_func_t fcn)
{
return _snd_ctl_register_ioctl(fcn, &snd_control_ioctls);
}
-
EXPORT_SYMBOL(snd_ctl_register_ioctl);
#ifdef CONFIG_COMPAT
+/**
+ * snd_ctl_register_ioctl_compat - register the device-specific 32bit compat
+ * control-ioctls
+ * @fcn: ioctl callback function
+ */
int snd_ctl_register_ioctl_compat(snd_kctl_ioctl_func_t fcn)
{
return _snd_ctl_register_ioctl(fcn, &snd_control_compat_ioctls);
}
-
EXPORT_SYMBOL(snd_ctl_register_ioctl_compat);
#endif
@@ -1566,19 +1576,26 @@ static int _snd_ctl_unregister_ioctl(snd_kctl_ioctl_func_t fcn,
return -EINVAL;
}
+/**
+ * snd_ctl_unregister_ioctl - de-register the device-specific control-ioctls
+ * @fcn: ioctl callback function to unregister
+ */
int snd_ctl_unregister_ioctl(snd_kctl_ioctl_func_t fcn)
{
return _snd_ctl_unregister_ioctl(fcn, &snd_control_ioctls);
}
-
EXPORT_SYMBOL(snd_ctl_unregister_ioctl);
#ifdef CONFIG_COMPAT
+/**
+ * snd_ctl_unregister_ioctl - de-register the device-specific compat 32bit
+ * control-ioctls
+ * @fcn: ioctl callback function to unregister
+ */
int snd_ctl_unregister_ioctl_compat(snd_kctl_ioctl_func_t fcn)
{
return _snd_ctl_unregister_ioctl(fcn, &snd_control_compat_ioctls);
}
-
EXPORT_SYMBOL(snd_ctl_unregister_ioctl_compat);
#endif
@@ -1702,6 +1719,16 @@ int snd_ctl_create(struct snd_card *card)
/*
* Frequently used control callbacks/helpers
*/
+
+/**
+ * snd_ctl_boolean_mono_info - Helper function for a standard boolean info
+ * callback with a mono channel
+ * @kcontrol: the kcontrol instance
+ * @uinfo: info to store
+ *
+ * This is a function that can be used as info callback for a standard
+ * boolean control with a single mono channel.
+ */
int snd_ctl_boolean_mono_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
@@ -1711,9 +1738,17 @@ int snd_ctl_boolean_mono_info(struct snd_kcontrol *kcontrol,
uinfo->value.integer.max = 1;
return 0;
}
-
EXPORT_SYMBOL(snd_ctl_boolean_mono_info);
+/**
+ * snd_ctl_boolean_stereo_info - Helper function for a standard boolean info
+ * callback with stereo two channels
+ * @kcontrol: the kcontrol instance
+ * @uinfo: info to store
+ *
+ * This is a function that can be used as info callback for a standard
+ * boolean control with stereo two channels.
+ */
int snd_ctl_boolean_stereo_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
@@ -1723,7 +1758,6 @@ int snd_ctl_boolean_stereo_info(struct snd_kcontrol *kcontrol,
uinfo->value.integer.max = 1;
return 0;
}
-
EXPORT_SYMBOL(snd_ctl_boolean_stereo_info);
/**

Privacy Policy