[ALSA] Keep private TLV entry in vmaster itself

Use a private array for TLV entries of virtual master controls instead
of (supposed) static array.  This cleans up the existing codes.

Also, now vmaster assumes the simple dB-range TLV that is the only type
it can handle.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/core/vmaster.c

@@ -12,6 +12,7 @@
 #include <linux/slab.h>
 #include <sound/core.h>
 #include <sound/control.h>
+#include <sound/tlv.h>
 
 /*
  * a subset of information returned via ctl info callback
@@ -34,6 +35,7 @@ struct link_master {
 	struct list_head slaves;
 	struct link_ctl_info info;
 	int val;		/* the master value */
+	unsigned int tlv[4];
 };
 
 /*
@@ -357,11 +359,12 @@ struct snd_kcontrol *snd_ctl_make_virtual_master(char *name,
 	kctl->private_free = master_free;
 
 	/* additional (constant) TLV read */
-	if (tlv) {
-		/* FIXME: this assumes that the max volume is 0 dB */
+	if (tlv && tlv[0] == SNDRV_CTL_TLVT_DB_SCALE) {
 		kctl->vd[0].access |= SNDRV_CTL_ELEM_ACCESS_TLV_READ;
-		kctl->tlv.p = tlv;
+		memcpy(master->tlv, tlv, sizeof(master->tlv));
+		kctl->tlv.p = master->tlv;
 	}
+
 	return kctl;
 }
 

sound/pci/hda/Makefile

@@ -2,7 +2,7 @@ snd-hda-intel-y := hda_intel.o
 # since snd-hda-intel is the only driver using hda-codec,
 # merge it into a single module although it was originally
 # designed to be individual modules
-snd-hda-intel-y += hda_codec.o vmaster.o
+snd-hda-intel-y += hda_codec.o
 snd-hda-intel-$(CONFIG_PROC_FS) += hda_proc.o
 snd-hda-intel-$(CONFIG_SND_HDA_HWDEP) += hda_hwdep.o
 snd-hda-intel-$(CONFIG_SND_HDA_GENERIC) += hda_generic.o

sound/pci/hda/patch_analog.c

@@ -80,7 +80,6 @@ struct ad198x_spec {
 #endif
 	/* for virtual master */
 	hda_nid_t vmaster_nid;
-	u32 vmaster_tlv[4];
 	const char **slave_vols;
 	const char **slave_sws;
 };
@@ -185,10 +184,11 @@ static int ad198x_build_controls(struct hda_codec *codec)
 
 	/* if we have no master control, let's create it */
 	if (!snd_hda_find_mixer_ctl(codec, "Master Playback Volume")) {
+		unsigned int vmaster_tlv[4];
 		snd_hda_set_vmaster_tlv(codec, spec->vmaster_nid,
-					HDA_OUTPUT, spec->vmaster_tlv);
+					HDA_OUTPUT, vmaster_tlv);
 		err = snd_hda_add_vmaster(codec, "Master Playback Volume",
-					  spec->vmaster_tlv,
+					  vmaster_tlv,
 					  (spec->slave_vols ?
 					   spec->slave_vols : ad_slave_vols));
 		if (err < 0)

sound/pci/hda/patch_realtek.c

@@ -272,7 +272,6 @@ struct alc_spec {
 
 	/* for virtual master */
 	hda_nid_t vmaster_nid;
-	u32 vmaster_tlv[4];
 #ifdef CONFIG_SND_HDA_POWER_SAVE
 	struct hda_loopback_check loopback;
 #endif
@@ -1534,10 +1533,11 @@ static int alc_build_controls(struct hda_codec *codec)
 
 	/* if we have no master control, let's create it */
 	if (!snd_hda_find_mixer_ctl(codec, "Master Playback Volume")) {
+		unsigned int vmaster_tlv[4];
 		snd_hda_set_vmaster_tlv(codec, spec->vmaster_nid,
-					HDA_OUTPUT, spec->vmaster_tlv);
+					HDA_OUTPUT, vmaster_tlv);
 		err = snd_hda_add_vmaster(codec, "Master Playback Volume",
-					  spec->vmaster_tlv, alc_slave_vols);
+					  vmaster_tlv, alc_slave_vols);
 		if (err < 0)
 			return err;
 	}

sound/pci/hda/patch_sigmatel.c

@@ -186,9 +186,6 @@ struct sigmatel_spec {
 	struct hda_input_mux private_dimux;
 	struct hda_input_mux private_imux;
 	struct hda_input_mux private_mono_mux;
-
-	/* virtual master */
-	unsigned int vmaster_tlv[4];
 };
 
 static hda_nid_t stac9200_adc_nids[1] = {
@@ -930,10 +927,11 @@ static int stac92xx_build_controls(struct hda_codec *codec)
 
 	/* if we have no master control, let's create it */
 	if (!snd_hda_find_mixer_ctl(codec, "Master Playback Volume")) {
+		unsigned int vmaster_tlv[4];
 		snd_hda_set_vmaster_tlv(codec, spec->multiout.dac_nids[0],
-					HDA_OUTPUT, spec->vmaster_tlv);
+					HDA_OUTPUT, vmaster_tlv);
 		err = snd_hda_add_vmaster(codec, "Master Playback Volume",
-					  spec->vmaster_tlv, slave_vols);
+					  vmaster_tlv, slave_vols);
 		if (err < 0)
 			return err;
 	}