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35be544a TI |
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> | |
bf815bf0 | 13 | #include <linux/export.h> |
35be544a TI |
14 | #include <sound/core.h> |
15 | #include <sound/control.h> | |
16 | ||
17 | #define jack_detect_kctl_info snd_ctl_boolean_mono_info | |
18 | ||
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 * | |
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 | ||
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); |