[alsa-devel] [RFC] [Patch 2/2] Add virtual master to HD-audio
Takashi Iwai
tiwai at suse.de
Thu Dec 20 16:46:35 CET 2007
This patch adds the virtual master controls to some codecs.
The virtual master controls are added only when no real "Master"
control is present.
Takashi
diff -r 861c951ac951 pci/Kconfig
--- a/pci/Kconfig Tue Sep 18 15:48:16 2007 +0200
+++ b/pci/Kconfig Tue Sep 18 15:48:29 2007 +0200
@@ -512,6 +512,7 @@ config SND_HDA_CODEC_REALTEK
config SND_HDA_CODEC_REALTEK
bool "Build Realtek HD-audio codec support"
depends on SND_HDA_INTEL
+ select SND_VMASTER
default y
help
Say Y here to include Realtek HD-audio codec support in
@@ -520,6 +521,7 @@ config SND_HDA_CODEC_ANALOG
config SND_HDA_CODEC_ANALOG
bool "Build Analog Device HD-audio codec support"
depends on SND_HDA_INTEL
+ select SND_VMASTER
default y
help
Say Y here to include Analog Device HD-audio codec support in
@@ -528,6 +530,7 @@ config SND_HDA_CODEC_SIGMATEL
config SND_HDA_CODEC_SIGMATEL
bool "Build IDT/Sigmatel HD-audio codec support"
depends on SND_HDA_INTEL
+ select SND_VMASTER
default y
help
Say Y here to include IDT (Sigmatel) HD-audio codec support in
diff -r 861c951ac951 pci/hda/hda_codec.c
--- a/pci/hda/hda_codec.c Tue Sep 18 15:48:16 2007 +0200
+++ b/pci/hda/hda_codec.c Tue Sep 18 15:48:29 2007 +0200
@@ -1016,6 +1016,68 @@ int snd_hda_mixer_amp_tlv(struct snd_kco
return -EFAULT;
return 0;
}
+
+#ifdef CONFIG_SND_VMASTER
+/*
+ * set (static) TLV for virtual master volume; recalculated as max 0dB
+ */
+void snd_hda_set_vmaster_tlv(struct hda_codec *codec, hda_nid_t nid, int dir,
+ unsigned int *tlv)
+{
+ u32 caps;
+ int nums, step;
+
+ caps = query_amp_caps(codec, nid, dir);
+ nums = (caps & AC_AMPCAP_NUM_STEPS) >> AC_AMPCAP_NUM_STEPS_SHIFT;
+ step = (caps & AC_AMPCAP_STEP_SIZE) >> AC_AMPCAP_STEP_SIZE_SHIFT;
+ step = (step + 1) * 25;
+ tlv[0] = SNDRV_CTL_TLVT_DB_SCALE;
+ tlv[1] = 2 * sizeof(unsigned int);
+ tlv[2] = -nums * step;
+ tlv[3] = step;
+}
+
+/* find a mixer control element with the given name */
+struct snd_kcontrol *snd_hda_find_mixer_ctl(struct hda_codec *codec,
+ const char *name)
+{
+ struct snd_ctl_elem_id id;
+ memset(&id, 0, sizeof(id));
+ id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
+ strcpy(id.name, name);
+ return snd_ctl_find_id(codec->bus->card, &id);
+}
+
+/* create a virtual master control and add slaves */
+int snd_hda_add_vmaster(struct hda_codec *codec, char *name,
+ unsigned int *tlv, const char **slaves)
+{
+ struct snd_kcontrol *kctl;
+ const char **s;
+ int err;
+
+ kctl = snd_ctl_make_virtual_master(name, tlv);
+ if (!kctl)
+ return -ENOMEM;
+ err = snd_ctl_add(codec->bus->card, kctl);
+ if (err < 0)
+ return err;
+
+ for (s = slaves; *s; s++) {
+ struct snd_kcontrol *sctl;
+
+ sctl = snd_hda_find_mixer_ctl(codec, *s);
+ if (!sctl) {
+ snd_printdd("Cannot find slave %s, skipped\n", *s);
+ continue;
+ }
+ err = snd_ctl_add_slave(kctl, sctl);
+ if (err < 0)
+ return err;
+ }
+ return 0;
+}
+#endif /* CONFIG_SND_VMASTER */
/* switch */
int snd_hda_mixer_amp_switch_info(struct snd_kcontrol *kcontrol,
diff -r 861c951ac951 pci/hda/hda_local.h
--- a/pci/hda/hda_local.h Tue Sep 18 15:48:16 2007 +0200
+++ b/pci/hda/hda_local.h Tue Sep 18 15:48:29 2007 +0200
@@ -90,6 +90,13 @@ void snd_hda_codec_resume_amp(struct hda
void snd_hda_codec_resume_amp(struct hda_codec *codec);
#endif
+void snd_hda_set_vmaster_tlv(struct hda_codec *codec, hda_nid_t nid, int dir,
+ unsigned int *tlv);
+struct snd_kcontrol *snd_hda_find_mixer_ctl(struct hda_codec *codec,
+ const char *name);
+int snd_hda_add_vmaster(struct hda_codec *codec, char *name,
+ unsigned int *tlv, const char **slaves);
+
/* amp value bits */
#define HDA_AMP_MUTE 0x80
#define HDA_AMP_UNMUTE 0x00
diff -r 861c951ac951 pci/hda/patch_analog.c
--- a/pci/hda/patch_analog.c Tue Sep 18 15:48:16 2007 +0200
+++ b/pci/hda/patch_analog.c Tue Sep 18 15:48:29 2007 +0200
@@ -79,6 +79,11 @@ struct ad198x_spec {
#ifdef CONFIG_SND_HDA_POWER_SAVE
struct hda_loopback_check loopback;
#endif
+ /* for virtual master */
+ hda_nid_t vmaster_nid;
+ u32 vmaster_tlv[4];
+ const char **slave_vols;
+ const char **slave_sws;
};
/*
@@ -125,6 +130,28 @@ static int ad198x_init(struct hda_codec
snd_hda_sequence_write(codec, spec->init_verbs[i]);
return 0;
}
+
+static const char *ad_slave_vols[] = {
+ "Front Playback Volume",
+ "Surround Playback Volume",
+ "Center Playback Volume",
+ "LFE Playback Volume",
+ "Side Playback Volume",
+ "Headphone Playback Volume",
+ "Mono Playback Volume",
+ NULL
+};
+
+static const char *ad_slave_sws[] = {
+ "Front Playback Switch",
+ "Surround Playback Switch",
+ "Center Playback Switch",
+ "LFE Playback Switch",
+ "Side Playback Switch",
+ "Headphone Playback Switch",
+ "Mono Playback Switch",
+ NULL
+};
static int ad198x_build_controls(struct hda_codec *codec)
{
@@ -147,6 +174,27 @@ static int ad198x_build_controls(struct
if (err < 0)
return err;
}
+
+ /* if we have no master control, let's create it */
+ if (!snd_hda_find_mixer_ctl(codec, "Master Playback Volume")) {
+ snd_hda_set_vmaster_tlv(codec, spec->vmaster_nid,
+ HDA_OUTPUT, spec->vmaster_tlv);
+ err = snd_hda_add_vmaster(codec, "Master Playback Volume",
+ spec->vmaster_tlv,
+ (spec->slave_vols ?
+ spec->slave_vols : ad_slave_vols));
+ if (err < 0)
+ return err;
+ }
+ if (!snd_hda_find_mixer_ctl(codec, "Master Playback Switch")) {
+ err = snd_hda_add_vmaster(codec, "Master Playback Switch",
+ NULL,
+ (spec->slave_sws ?
+ spec->slave_sws : ad_slave_sws));
+ if (err < 0)
+ return err;
+ }
+
return 0;
}
@@ -897,6 +945,7 @@ static int patch_ad1986a(struct hda_code
#ifdef CONFIG_SND_HDA_POWER_SAVE
spec->loopback.amplist = ad1986a_loopbacks;
#endif
+ spec->vmaster_nid = 0x1b;
codec->patch_ops = ad198x_patch_ops;
@@ -1129,6 +1178,7 @@ static int patch_ad1983(struct hda_codec
#ifdef CONFIG_SND_HDA_POWER_SAVE
spec->loopback.amplist = ad1983_loopbacks;
#endif
+ spec->vmaster_nid = 0x05;
codec->patch_ops = ad198x_patch_ops;
@@ -1525,6 +1575,7 @@ static int patch_ad1981(struct hda_codec
#ifdef CONFIG_SND_HDA_POWER_SAVE
spec->loopback.amplist = ad1981_loopbacks;
#endif
+ spec->vmaster_nid = 0x05;
codec->patch_ops = ad198x_patch_ops;
@@ -2834,6 +2885,7 @@ static int patch_ad1988(struct hda_codec
#ifdef CONFIG_SND_HDA_POWER_SAVE
spec->loopback.amplist = ad1988_loopbacks;
#endif
+ spec->vmaster_nid = 0x04;
return 0;
}
@@ -3000,6 +3052,19 @@ static struct hda_amp_list ad1884_loopba
};
#endif
+static const char *ad1884_slave_vols[] = {
+ "PCM Playback Volume",
+ "Mic Playback Volume",
+ "Mono Playback Volume",
+ "Front Mic Playback Volume",
+ "Mic Playback Volume",
+ "CD Playback Volume",
+ "Internal Mic Playback Volume",
+ "Docking Mic Playback Volume"
+ "Beep Playback Volume",
+ NULL
+};
+
static int patch_ad1884(struct hda_codec *codec)
{
struct ad198x_spec *spec;
@@ -3027,6 +3092,9 @@ static int patch_ad1884(struct hda_codec
#ifdef CONFIG_SND_HDA_POWER_SAVE
spec->loopback.amplist = ad1884_loopbacks;
#endif
+ spec->vmaster_nid = 0x04;
+ /* we need to cover all playback volumes */
+ spec->slave_vols = ad1884_slave_vols;
codec->patch_ops = ad198x_patch_ops;
@@ -3459,6 +3527,7 @@ static int patch_ad1882(struct hda_codec
#ifdef CONFIG_SND_HDA_POWER_SAVE
spec->loopback.amplist = ad1882_loopbacks;
#endif
+ spec->vmaster_nid = 0x04;
codec->patch_ops = ad198x_patch_ops;
diff -r 861c951ac951 pci/hda/patch_realtek.c
--- a/pci/hda/patch_realtek.c Tue Sep 18 15:48:16 2007 +0200
+++ b/pci/hda/patch_realtek.c Tue Sep 18 15:48:29 2007 +0200
@@ -247,6 +247,9 @@ struct alc_spec {
unsigned int sense_updated: 1;
unsigned int jack_present: 1;
+ /* for virtual master */
+ hda_nid_t vmaster_nid;
+ u32 vmaster_tlv[4];
#ifdef CONFIG_SND_HDA_POWER_SAVE
struct hda_loopback_check loopback;
#endif
@@ -1098,8 +1101,8 @@ static struct snd_kcontrol_new alc880_f1
static struct snd_kcontrol_new alc880_f1734_mixer[] = {
HDA_CODEC_VOLUME("Headphone Playback Volume", 0x0c, 0x0, HDA_OUTPUT),
HDA_BIND_MUTE("Headphone Playback Switch", 0x0c, 2, HDA_INPUT),
- HDA_CODEC_VOLUME("Internal Speaker Playback Volume", 0x0d, 0x0, HDA_OUTPUT),
- HDA_BIND_MUTE("Internal Speaker Playback Switch", 0x0d, 2, HDA_INPUT),
+ HDA_CODEC_VOLUME("Speaker Playback Volume", 0x0d, 0x0, HDA_OUTPUT),
+ HDA_BIND_MUTE("Speaker Playback Switch", 0x0d, 2, HDA_INPUT),
HDA_CODEC_VOLUME("CD Playback Volume", 0x0b, 0x04, HDA_INPUT),
HDA_CODEC_MUTE("CD Playback Switch", 0x0b, 0x04, HDA_INPUT),
HDA_CODEC_VOLUME("Mic Playback Volume", 0x0b, 0x0, HDA_INPUT),
@@ -1197,10 +1200,10 @@ static struct snd_kcontrol_new alc880_tc
/* Uniwill */
static struct snd_kcontrol_new alc880_uniwill_mixer[] = {
- HDA_CODEC_VOLUME("HPhone Playback Volume", 0x0c, 0x0, HDA_OUTPUT),
- HDA_BIND_MUTE("HPhone Playback Switch", 0x0c, 2, HDA_INPUT),
- HDA_CODEC_VOLUME("iSpeaker Playback Volume", 0x0d, 0x0, HDA_OUTPUT),
- HDA_BIND_MUTE("iSpeaker Playback Switch", 0x0d, 2, HDA_INPUT),
+ HDA_CODEC_VOLUME("Headphone Playback Volume", 0x0c, 0x0, HDA_OUTPUT),
+ HDA_BIND_MUTE("Headphone Playback Switch", 0x0c, 2, HDA_INPUT),
+ HDA_CODEC_VOLUME("Speaker Playback Volume", 0x0d, 0x0, HDA_OUTPUT),
+ HDA_BIND_MUTE("Speaker Playback Switch", 0x0d, 2, HDA_INPUT),
HDA_CODEC_VOLUME_MONO("Center Playback Volume", 0x0e, 1, 0x0, HDA_OUTPUT),
HDA_CODEC_VOLUME_MONO("LFE Playback Volume", 0x0e, 2, 0x0, HDA_OUTPUT),
HDA_BIND_MUTE_MONO("Center Playback Switch", 0x0e, 1, 2, HDA_INPUT),
@@ -1240,13 +1243,47 @@ static struct snd_kcontrol_new alc880_fu
};
static struct snd_kcontrol_new alc880_uniwill_p53_mixer[] = {
- HDA_CODEC_VOLUME("HPhone Playback Volume", 0x0c, 0x0, HDA_OUTPUT),
- HDA_BIND_MUTE("HPhone Playback Switch", 0x0c, 2, HDA_INPUT),
- HDA_CODEC_VOLUME("iSpeaker Playback Volume", 0x0d, 0x0, HDA_OUTPUT),
- HDA_BIND_MUTE("iSpeaker Playback Switch", 0x0d, 2, HDA_INPUT),
+ HDA_CODEC_VOLUME("Headphone Playback Volume", 0x0c, 0x0, HDA_OUTPUT),
+ HDA_BIND_MUTE("Headphone Playback Switch", 0x0c, 2, HDA_INPUT),
+ HDA_CODEC_VOLUME("Speaker Playback Volume", 0x0d, 0x0, HDA_OUTPUT),
+ HDA_BIND_MUTE("Speaker Playback Switch", 0x0d, 2, HDA_INPUT),
HDA_CODEC_VOLUME("Mic Playback Volume", 0x0b, 0x0, HDA_INPUT),
HDA_CODEC_MUTE("Mic Playback Switch", 0x0b, 0x0, HDA_INPUT),
{ } /* end */
+};
+
+/*
+ * virtual master controls
+ */
+
+/*
+ * slave controls for virtual master
+ */
+static const char *alc_slave_vols[] = {
+ "Front Playback Volume",
+ "Surround Playback Volume",
+ "Center Playback Volume",
+ "LFE Playback Volume",
+ "Side Playback Volume",
+ "Headphone Playback Volume",
+ "Speaker Playback Volume",
+ "Mono Playback Volume",
+ "iSpeaker Playback Volume",
+ "Line-Out Playback Volume",
+ NULL,
+};
+
+static const char *alc_slave_sws[] = {
+ "Front Playback Switch",
+ "Surround Playback Switch",
+ "Center Playback Switch",
+ "LFE Playback Switch",
+ "Side Playback Switch",
+ "Headphone Playback Switch",
+ "Speaker Playback Switch",
+ "Mono Playback Switch",
+ "iSpeaker Playback Switch",
+ NULL,
};
/*
@@ -1275,6 +1312,23 @@ static int alc_build_controls(struct hda
if (err < 0)
return err;
}
+
+ /* if we have no master control, let's create it */
+ if (!snd_hda_find_mixer_ctl(codec, "Master Playback Volume")) {
+ snd_hda_set_vmaster_tlv(codec, spec->vmaster_nid,
+ HDA_OUTPUT, spec->vmaster_tlv);
+ err = snd_hda_add_vmaster(codec, "Master Playback Volume",
+ spec->vmaster_tlv, alc_slave_vols);
+ if (err < 0)
+ return err;
+ }
+ if (!snd_hda_find_mixer_ctl(codec, "Master Playback Switch")) {
+ err = snd_hda_add_vmaster(codec, "Master Playback Switch",
+ NULL, alc_slave_sws);
+ if (err < 0)
+ return err;
+ }
+
return 0;
}
@@ -1823,8 +1877,8 @@ static struct hda_channel_mode alc880_lg
static struct snd_kcontrol_new alc880_lg_mixer[] = {
/* FIXME: it's not really "master" but front channels */
- HDA_CODEC_VOLUME("Master Playback Volume", 0x0f, 0x0, HDA_OUTPUT),
- HDA_BIND_MUTE("Master Playback Switch", 0x0f, 2, HDA_INPUT),
+ HDA_CODEC_VOLUME("Front Playback Volume", 0x0f, 0x0, HDA_OUTPUT),
+ HDA_BIND_MUTE("Front Playback Switch", 0x0f, 2, HDA_INPUT),
HDA_CODEC_VOLUME("Surround Playback Volume", 0x0c, 0x0, HDA_OUTPUT),
HDA_BIND_MUTE("Surround Playback Switch", 0x0c, 2, HDA_INPUT),
HDA_CODEC_VOLUME_MONO("Center Playback Volume", 0x0d, 1, 0x0, HDA_OUTPUT),
@@ -3390,6 +3444,8 @@ static int patch_alc880(struct hda_codec
spec->num_mixers++;
}
}
+
+ spec->vmaster_nid = 0x0c;
codec->patch_ops = alc_patch_ops;
if (board_config == ALC880_AUTO)
@@ -4762,6 +4818,8 @@ static int patch_alc260(struct hda_codec
spec->stream_digital_playback = &alc260_pcm_digital_playback;
spec->stream_digital_capture = &alc260_pcm_digital_capture;
+ spec->vmaster_nid = 0x08;
+
codec->patch_ops = alc_patch_ops;
if (board_config == ALC260_AUTO)
spec->init_hook = alc260_auto_init;
@@ -4962,15 +5020,15 @@ static struct snd_kcontrol_new alc882_ba
};
static struct snd_kcontrol_new alc885_mbp3_mixer[] = {
- HDA_CODEC_VOLUME("Master Volume", 0x0c, 0x00, HDA_OUTPUT),
- HDA_BIND_MUTE ("Master Switch", 0x0c, 0x02, HDA_INPUT),
- HDA_CODEC_MUTE ("Speaker Switch", 0x14, 0x00, HDA_OUTPUT),
- HDA_CODEC_VOLUME("Line Out Volume", 0x0d,0x00, HDA_OUTPUT),
- HDA_CODEC_VOLUME("Line In Playback Volume", 0x0b, 0x02, HDA_INPUT),
- HDA_CODEC_MUTE ("Line In Playback Switch", 0x0b, 0x02, HDA_INPUT),
+ HDA_CODEC_VOLUME("Front Playback Volume", 0x0c, 0x00, HDA_OUTPUT),
+ HDA_BIND_MUTE ("Front Playback Switch", 0x0c, 0x02, HDA_INPUT),
+ HDA_CODEC_MUTE ("Speaker Playback Switch", 0x14, 0x00, HDA_OUTPUT),
+ HDA_CODEC_VOLUME("Line-Out Playback Volume", 0x0d, 0x00, HDA_OUTPUT),
+ HDA_CODEC_VOLUME("Line Playback Volume", 0x0b, 0x02, HDA_INPUT),
+ HDA_CODEC_MUTE ("Line Playback Switch", 0x0b, 0x02, HDA_INPUT),
HDA_CODEC_VOLUME("Mic Playback Volume", 0x0b, 0x00, HDA_INPUT),
HDA_CODEC_MUTE ("Mic Playback Switch", 0x0b, 0x00, HDA_INPUT),
- HDA_CODEC_VOLUME("Line In Boost", 0x1a, 0x00, HDA_INPUT),
+ HDA_CODEC_VOLUME("Line Boost", 0x1a, 0x00, HDA_INPUT),
HDA_CODEC_VOLUME("Mic Boost", 0x18, 0x00, HDA_INPUT),
{ } /* end */
};
@@ -5971,6 +6029,8 @@ static int patch_alc882(struct hda_codec
spec->num_mixers++;
}
}
+
+ spec->vmaster_nid = 0x0c;
codec->patch_ops = alc_patch_ops;
if (board_config == ALC882_AUTO)
@@ -7446,6 +7506,8 @@ static int patch_alc883(struct hda_codec
spec->adc_nids = alc883_adc_nids;
spec->num_adc_nids = ARRAY_SIZE(alc883_adc_nids);
}
+
+ spec->vmaster_nid = 0x0c;
codec->patch_ops = alc_patch_ops;
if (board_config == ALC883_AUTO)
@@ -8566,6 +8628,8 @@ static int patch_alc262(struct hda_codec
}
}
+ spec->vmaster_nid = 0x0c;
+
codec->patch_ops = alc_patch_ops;
if (board_config == ALC262_AUTO)
spec->init_hook = alc262_auto_init;
@@ -9240,6 +9304,9 @@ static int patch_alc268(struct hda_codec
}
}
}
+
+ spec->vmaster_nid = 0x02;
+
codec->patch_ops = alc_patch_ops;
if (board_config == ALC268_AUTO)
spec->init_hook = alc268_auto_init;
@@ -10394,6 +10461,8 @@ static int patch_alc861(struct hda_codec
spec->stream_digital_playback = &alc861_pcm_digital_playback;
spec->stream_digital_capture = &alc861_pcm_digital_capture;
+ spec->vmaster_nid = 0x03;
+
codec->patch_ops = alc_patch_ops;
if (board_config == ALC861_AUTO)
spec->init_hook = alc861_auto_init;
@@ -11370,6 +11439,8 @@ static int patch_alc861vd(struct hda_cod
spec->mixers[spec->num_mixers] = alc861vd_capture_mixer;
spec->num_mixers++;
+
+ spec->vmaster_nid = 0x02;
codec->patch_ops = alc_patch_ops;
@@ -12222,6 +12293,8 @@ static int patch_alc662(struct hda_codec
spec->num_adc_nids = ARRAY_SIZE(alc662_adc_nids);
}
+ spec->vmaster_nid = 0x02;
+
codec->patch_ops = alc_patch_ops;
if (board_config == ALC662_AUTO)
spec->init_hook = alc662_auto_init;
diff -r 861c951ac951 pci/hda/patch_sigmatel.c
--- a/pci/hda/patch_sigmatel.c Tue Sep 18 15:48:16 2007 +0200
+++ b/pci/hda/patch_sigmatel.c Tue Sep 18 15:48:29 2007 +0200
@@ -156,6 +156,9 @@ struct sigmatel_spec {
struct snd_kcontrol_new *kctl_alloc;
struct hda_input_mux private_dimux;
struct hda_input_mux private_imux;
+
+ /* virtual master */
+ unsigned int vmaster_tlv[4];
};
static hda_nid_t stac9200_adc_nids[1] = {
@@ -521,6 +524,34 @@ static struct snd_kcontrol_new stac927x_
{ } /* end */
};
+static const char *slave_vols[] = {
+ "Front Playback Volume",
+ "Surround Playback Volume",
+ "Center Playback Volume",
+ "LFE Playback Volume",
+ "Side Playback Volume",
+ "Headphone Playback Volume",
+ "Headphone Playback Volume",
+ "Speaker Playback Volume",
+ "External Speaker Playback Volume",
+ "Speaker2 Playback Volume",
+ NULL
+};
+
+static const char *slave_sws[] = {
+ "Front Playback Switch",
+ "Surround Playback Switch",
+ "Center Playback Switch",
+ "LFE Playback Switch",
+ "Side Playback Switch",
+ "Headphone Playback Switch",
+ "Headphone Playback Switch",
+ "Speaker Playback Switch",
+ "External Speaker Playback Switch",
+ "Speaker2 Playback Switch",
+ NULL
+};
+
static int stac92xx_build_controls(struct hda_codec *codec)
{
struct sigmatel_spec *spec = codec->spec;
@@ -547,6 +578,23 @@ static int stac92xx_build_controls(struc
if (err < 0)
return err;
}
+
+ /* if we have no master control, let's create it */
+ if (!snd_hda_find_mixer_ctl(codec, "Master Playback Volume")) {
+ snd_hda_set_vmaster_tlv(codec, spec->multiout.dac_nids[0],
+ HDA_OUTPUT, spec->vmaster_tlv);
+ err = snd_hda_add_vmaster(codec, "Master Playback Volume",
+ spec->vmaster_tlv, slave_vols);
+ if (err < 0)
+ return err;
+ }
+ if (!snd_hda_find_mixer_ctl(codec, "Master Playback Switch")) {
+ err = snd_hda_add_vmaster(codec, "Master Playback Switch",
+ NULL, slave_sws);
+ if (err < 0)
+ return err;
+ }
+
return 0;
}
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