2
* Helper functions for jack-detection kcontrols
4
* Copyright (c) 2011 Takashi Iwai <tiwai@suse.de>
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)
12
#include <linux/kernel.h>
13
#include <linux/export.h>
14
#include <sound/core.h>
15
#include <sound/control.h>
17
#define jack_detect_kctl_info snd_ctl_boolean_mono_info
19
static int jack_detect_kctl_get(struct snd_kcontrol *kcontrol,
20
struct snd_ctl_elem_value *ucontrol)
22
ucontrol->value.integer.value[0] = kcontrol->private_value;
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,
35
snd_kctl_jack_new(const char *name, int idx, void *private_data)
37
struct snd_kcontrol *kctl;
38
kctl = snd_ctl_new1(&jack_detect_kctl, private_data);
41
snprintf(kctl->id.name, sizeof(kctl->id.name), "%s Jack", name);
43
kctl->private_value = 0;
46
EXPORT_SYMBOL_GPL(snd_kctl_jack_new);
48
void snd_kctl_jack_report(struct snd_card *card,
49
struct snd_kcontrol *kctl, bool status)
51
if (kctl->private_value == status)
53
kctl->private_value = status;
54
snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
56
EXPORT_SYMBOL_GPL(snd_kctl_jack_report);