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Commit 35be544a authored by Takashi Iwai's avatar Takashi Iwai
Browse files

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: default avatarTakashi Iwai <tiwai@suse.de>
parent 3a93897e

include/sound/control.h

+8 −0
Original line number Diff line number Diff line
@@ -227,4 +227,12 @@ snd_ctl_add_slave_uncached(struct snd_kcontrol *master, 
	return _snd_ctl_add_slave(master, slave, SND_CTL_SLAVE_NEED_UPDATE);

}



/*

 * Helper functions for jack-detection controls

 */

struct snd_kcontrol *

snd_kctl_jack_new(const char *name, int idx, void *private_data);

void snd_kctl_jack_report(struct snd_card *card,

			  struct snd_kcontrol *kctl, bool status);



#endif	/* __SOUND_CONTROL_H */

sound/core/Kconfig

+3 −0
Original line number Diff line number Diff line
@@ -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

sound/core/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -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 \

sound/core/ctljack.c

0 → 100644
+55 −0
Original line number Diff line number Diff line 
/*

 * 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);

sound/pci/hda/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -2,6 +2,7 @@ menuconfig SND_HDA_INTEL 
	tristate "Intel HD Audio"

	select SND_PCM

	select SND_VMASTER

	select SND_KCTL_JACK

	help

	  Say Y here to include support for Intel "High Definition

	  Audio" (Azalia) and its compatible devices.