[ALSA] Move vmaster code to sound core

Move the codes for virtual master controls to sound core part so that
not only hda-intel drivers can use it.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

include/sound/control.h

@@ -169,4 +169,11 @@ int snd_ctl_boolean_mono_info(struct snd_kcontrol *kcontrol,
 int snd_ctl_boolean_stereo_info(struct snd_kcontrol *kcontrol,
 				struct snd_ctl_elem_info *uinfo);
 
+/*
+ * virtual master control
+ */
+struct snd_kcontrol *snd_ctl_make_virtual_master(char *name,
+						 const unsigned int *tlv);
+int snd_ctl_add_slave(struct snd_kcontrol *master, struct snd_kcontrol *slave);
+		      
 #endif	/* __SOUND_CONTROL_H */

sound/core/Kconfig

@@ -181,3 +181,7 @@ config SND_PCM_XRUN_DEBUG
 	  It is usually not required, but if you have trouble with
 	  sound clicking when system is loaded, it may help to determine
 	  the process or driver which causes the scheduling gaps.
+
+config SND_VMASTER
+	bool
+	depends on SND

sound/core/Makefile

@@ -6,6 +6,7 @@
 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-pcm-objs := pcm.o pcm_native.o pcm_lib.o pcm_timer.o pcm_misc.o \
 		pcm_memory.o

sound/pci/hda/vmaster.c → sound/core/vmaster.c

@@ -253,6 +253,8 @@ int snd_ctl_add_slave(struct snd_kcontrol *master, struct snd_kcontrol *slave)
 	return 0;
 }
 
+EXPORT_SYMBOL(snd_ctl_add_slave);
+
 /*
  * ctl callbacks for master controls
  */
@@ -362,3 +364,5 @@ struct snd_kcontrol *snd_ctl_make_virtual_master(char *name,
 	}
 	return kctl;
 }
+
+EXPORT_SYMBOL(snd_ctl_make_virtual_master);

sound/pci/Kconfig

@@ -517,6 +517,7 @@ config SND_HDA_INTEL
 	tristate "Intel HD Audio"
 	depends on SND
 	select SND_PCM
+	select SND_VMASTER
 	help
 	  Say Y here to include support for Intel "High Definition
 	  Audio" (Azalia) motherboard devices.

sound/pci/hda/hda_local.h

@@ -418,11 +418,4 @@ int snd_hda_check_amp_list_power(struct hda_codec *codec,
 				 hda_nid_t nid);
 #endif /* CONFIG_SND_HDA_POWER_SAVE */
 
-/*
- * virtual master control
- */
-struct snd_kcontrol *snd_ctl_make_virtual_master(char *name,
-						 const unsigned int *tlv);
-int snd_ctl_add_slave(struct snd_kcontrol *master, struct snd_kcontrol *slave);
-		      
 #endif /* __SOUND_HDA_LOCAL_H */