ALSA: hda - Add "Mute-LED Mode" enum control
Create snd_hda_add_vmaster_hook() and snd_hda_sync_vmaster_hook()
helper functions to handle the mute-LED in vmaster hook more
commonly. In the former function, a new enum control "Mute-LED Mode"
is added. This provides user to choose whether the mute-LED should be
turned on/off explicitly or to follow the master-mute status.
Reviewed-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index b79ee34..b981ea9 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -2450,6 +2450,100 @@
}
EXPORT_SYMBOL_HDA(__snd_hda_add_vmaster);
+/*
+ * mute-LED control using vmaster
+ */
+static int vmaster_mute_mode_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ static const char * const texts[] = {
+ "Off", "On", "Follow Master"
+ };
+ unsigned int index;
+
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
+ uinfo->count = 1;
+ uinfo->value.enumerated.items = 3;
+ index = uinfo->value.enumerated.item;
+ if (index >= 3)
+ index = 2;
+ strcpy(uinfo->value.enumerated.name, texts[index]);
+ return 0;
+}
+
+static int vmaster_mute_mode_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct hda_vmaster_mute_hook *hook = snd_kcontrol_chip(kcontrol);
+ ucontrol->value.enumerated.item[0] = hook->mute_mode;
+ return 0;
+}
+
+static int vmaster_mute_mode_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct hda_vmaster_mute_hook *hook = snd_kcontrol_chip(kcontrol);
+ unsigned int old_mode = hook->mute_mode;
+
+ hook->mute_mode = ucontrol->value.enumerated.item[0];
+ if (hook->mute_mode > HDA_VMUTE_FOLLOW_MASTER)
+ hook->mute_mode = HDA_VMUTE_FOLLOW_MASTER;
+ if (old_mode == hook->mute_mode)
+ return 0;
+ snd_hda_sync_vmaster_hook(hook);
+ return 1;
+}
+
+static struct snd_kcontrol_new vmaster_mute_mode = {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "Mute-LED Mode",
+ .info = vmaster_mute_mode_info,
+ .get = vmaster_mute_mode_get,
+ .put = vmaster_mute_mode_put,
+};
+
+/*
+ * Add a mute-LED hook with the given vmaster switch kctl
+ * "Mute-LED Mode" control is automatically created and associated with
+ * the given hook.
+ */
+int snd_hda_add_vmaster_hook(struct hda_codec *codec,
+ struct hda_vmaster_mute_hook *hook)
+{
+ struct snd_kcontrol *kctl;
+
+ if (!hook->hook || !hook->sw_kctl)
+ return 0;
+ snd_ctl_add_vmaster_hook(hook->sw_kctl, hook->hook, codec);
+ hook->codec = codec;
+ hook->mute_mode = HDA_VMUTE_FOLLOW_MASTER;
+ kctl = snd_ctl_new1(&vmaster_mute_mode, hook);
+ if (!kctl)
+ return -ENOMEM;
+ return snd_hda_ctl_add(codec, 0, kctl);
+}
+EXPORT_SYMBOL_HDA(snd_hda_add_vmaster_hook);
+
+/*
+ * Call the hook with the current value for synchronization
+ * Should be called in init callback
+ */
+void snd_hda_sync_vmaster_hook(struct hda_vmaster_mute_hook *hook)
+{
+ if (!hook->hook || !hook->codec)
+ return;
+ switch (hook->mute_mode) {
+ case HDA_VMUTE_FOLLOW_MASTER:
+ snd_ctl_sync_vmaster_hook(hook->sw_kctl);
+ break;
+ default:
+ hook->hook(hook->codec, hook->mute_mode);
+ break;
+ }
+}
+EXPORT_SYMBOL_HDA(snd_hda_sync_vmaster_hook);
+
+
/**
* snd_hda_mixer_amp_switch_info - Info callback for a standard AMP mixer switch
*