ALSA: hda - Add a helper function for simple enum kcontrols

The same type of code is being used in multiple places in various
codec drivers, so put it as a core library.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 9 insertions, 0 deletions

diff --git a/sound/pci/hda/hda_local.h b/sound/pci/hda/hda_local.h
index 8c43198b7f56..4b40a5e7a8f5 100644
--- a/sound/pci/hda/hda_local.h
+++ b/sound/pci/hda/hda_local.h
@@ -601,6 +601,15 @@ int snd_hda_check_amp_list_power(struct hda_codec *codec,
 #define get_amp_min_mute(kc)    (((kc)->private_value >> 29) & 0x1)
 
 /*
+ * enum control helper
+ */
+int snd_hda_enum_helper_info(struct snd_kcontrol *kcontrol,
+                             struct snd_ctl_elem_info *uinfo,
+                             int num_entries, const char * const *texts);
+#define snd_hda_enum_bool_helper_info(kcontrol, uinfo) \
+        snd_hda_enum_helper_info(kcontrol, uinfo, 0, NULL)
+
+/*
  * CEA Short Audio Descriptor data
  */
 struct cea_sad {