[ALSA] Add helper functions for frequently used callbacks

Added helper functions for frequenty used callbacks:
  snd_ctl_boolean_mono_info() and snd_ctl_boolean_stereo_info()

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

1 files changed, 8 insertions, 0 deletions

diff --git a/include/sound/control.h b/include/sound/control.h
index 72e759f619b1..b26d4633ee2c 100644
--- a/include/sound/control.h
+++ b/include/sound/control.h
@@ -161,4 +161,12 @@ static inline struct snd_ctl_elem_id *snd_ctl_build_ioff(struct snd_ctl_elem_id
         return dst_id;
 }
 
+/*
+ * Frequently used control callbacks
+ */
+int snd_ctl_boolean_mono_info(struct snd_kcontrol *kcontrol,
+                              struct snd_ctl_elem_info *uinfo);
+int snd_ctl_boolean_stereo_info(struct snd_kcontrol *kcontrol,
+                                struct snd_ctl_elem_info *uinfo);
+
 #endif  /* __SOUND_CONTROL_H */