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| author | Takashi Iwai <tiwai@suse.de> | 2011-11-02 08:36:06 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2011-11-16 11:14:03 +0100 |
| commit | 35be544af367170a9c6bf63adcf9d0cb2d569dbb (patch) | |
| tree | 7bcd2dabde3b3f950916962edb5c601482c00335 /sound/core | |
| parent | 3a93897ea37cbb8277f8a4232c12c0c18168a7db (diff) | |
| download | linux-35be544af367170a9c6bf63adcf9d0cb2d569dbb.tar.bz2 | |
ALSA: Introduce common helper functions for jack-detection control
Now move the helper function for creating and reporting the jack-detection
to the common place. The driver that needs this functionality should
select CONFIG_SND_KCTL_JACK kconfig.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core')
| -rw-r--r-- | sound/core/Kconfig | 3 | ||||
| -rw-r--r-- | sound/core/Makefile | 1 | ||||
| -rw-r--r-- | sound/core/ctljack.c | 55 |
3 files changed, 59 insertions, 0 deletions
diff --git a/sound/core/Kconfig b/sound/core/Kconfig index 475455c76610..66f287f2f759 100644 --- a/sound/core/Kconfig +++ b/sound/core/Kconfig @@ -207,6 +207,9 @@ config SND_PCM_XRUN_DEBUG config SND_VMASTER bool +config SND_KCTL_JACK + bool + config SND_DMA_SGBUF def_bool y depends on X86 diff --git a/sound/core/Makefile b/sound/core/Makefile index 350a08d277f4..b4637c3e776e 100644 --- a/sound/core/Makefile +++ b/sound/core/Makefile @@ -7,6 +7,7 @@ snd-y := sound.o init.o memory.o info.o control.o misc.o device.o snd-$(CONFIG_ISA_DMA_API) += isadma.o snd-$(CONFIG_SND_OSSEMUL) += sound_oss.o info_oss.o snd-$(CONFIG_SND_VMASTER) += vmaster.o +snd-$(CONFIG_SND_KCTL_JACK) += ctljack.o snd-$(CONFIG_SND_JACK) += jack.o snd-pcm-objs := pcm.o pcm_native.o pcm_lib.o pcm_timer.o pcm_misc.o \ diff --git a/sound/core/ctljack.c b/sound/core/ctljack.c new file mode 100644 index 000000000000..af0e78a3809c --- /dev/null +++ b/sound/core/ctljack.c @@ -0,0 +1,55 @@ +/* + * 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 <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); |