mirror of
https://github.com/torvalds/linux.git
synced 2024-11-13 23:51:39 +00:00
57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
/*
|
|
* Helper functions for jack-detection kcontrols
|
|
*
|
|
* Copyright (c) 2011 Takashi Iwai <tiwai@suse.de>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the Free
|
|
* Software Foundation; either version 2 of the License, or (at your option)
|
|
* any later version.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/export.h>
|
|
#include <sound/core.h>
|
|
#include <sound/control.h>
|
|
|
|
#define jack_detect_kctl_info snd_ctl_boolean_mono_info
|
|
|
|
static int jack_detect_kctl_get(struct snd_kcontrol *kcontrol,
|
|
struct snd_ctl_elem_value *ucontrol)
|
|
{
|
|
ucontrol->value.integer.value[0] = kcontrol->private_value;
|
|
return 0;
|
|
}
|
|
|
|
static struct snd_kcontrol_new jack_detect_kctl = {
|
|
/* name is filled later */
|
|
.iface = SNDRV_CTL_ELEM_IFACE_CARD,
|
|
.access = SNDRV_CTL_ELEM_ACCESS_READ,
|
|
.info = jack_detect_kctl_info,
|
|
.get = jack_detect_kctl_get,
|
|
};
|
|
|
|
struct snd_kcontrol *
|
|
snd_kctl_jack_new(const char *name, int idx, void *private_data)
|
|
{
|
|
struct snd_kcontrol *kctl;
|
|
kctl = snd_ctl_new1(&jack_detect_kctl, private_data);
|
|
if (!kctl)
|
|
return NULL;
|
|
snprintf(kctl->id.name, sizeof(kctl->id.name), "%s Jack", name);
|
|
kctl->id.index = idx;
|
|
kctl->private_value = 0;
|
|
return kctl;
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_kctl_jack_new);
|
|
|
|
void snd_kctl_jack_report(struct snd_card *card,
|
|
struct snd_kcontrol *kctl, bool status)
|
|
{
|
|
if (kctl->private_value == status)
|
|
return;
|
|
kctl->private_value = status;
|
|
snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_kctl_jack_report);
|