1 /*
2 * Helper functions for jack-detection kcontrols
3 *
4 * Copyright (c) 2011 Takashi Iwai <tiwai@suse.de>
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the Free
8 * Software Foundation; either version 2 of the License, or (at your option)
9 * any later version.
10 */
11
12 #include <linux/kernel.h>
13 #include <linux/export.h>
14 #include <sound/core.h>
15 #include <sound/control.h>
16
17 #define jack_detect_kctl_info snd_ctl_boolean_mono_info
18
jack_detect_kctl_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)19 static int jack_detect_kctl_get(struct snd_kcontrol *kcontrol,
20 struct snd_ctl_elem_value *ucontrol)
21 {
22 ucontrol->value.integer.value[0] = kcontrol->private_value;
23 return 0;
24 }
25
26 static struct snd_kcontrol_new jack_detect_kctl = {
27 /* name is filled later */
28 .iface = SNDRV_CTL_ELEM_IFACE_CARD,
29 .access = SNDRV_CTL_ELEM_ACCESS_READ,
30 .info = jack_detect_kctl_info,
31 .get = jack_detect_kctl_get,
32 };
33
34 struct snd_kcontrol *
snd_kctl_jack_new(const char * name,int idx,void * private_data)35 snd_kctl_jack_new(const char *name, int idx, void *private_data)
36 {
37 struct snd_kcontrol *kctl;
38 kctl = snd_ctl_new1(&jack_detect_kctl, private_data);
39 if (!kctl)
40 return NULL;
41 snprintf(kctl->id.name, sizeof(kctl->id.name), "%s Jack", name);
42 kctl->id.index = idx;
43 kctl->private_value = 0;
44 return kctl;
45 }
46 EXPORT_SYMBOL_GPL(snd_kctl_jack_new);
47
snd_kctl_jack_report(struct snd_card * card,struct snd_kcontrol * kctl,bool status)48 void snd_kctl_jack_report(struct snd_card *card,
49 struct snd_kcontrol *kctl, bool status)
50 {
51 if (kctl->private_value == status)
52 return;
53 kctl->private_value = status;
54 snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
55 }
56 EXPORT_SYMBOL_GPL(snd_kctl_jack_report);
57