[ALSA] hda-codec - Add virtual master controls

Add master controls using vmaster to codecs that have no real hardware
master volume registers.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

1 files changed, 48 insertions, 0 deletions

diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index a0af8680dd0d..190e112f2f8e 100644
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -170,6 +170,9 @@ 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] = {
@@ -794,6 +797,34 @@ static struct snd_kcontrol_new stac_dmux_mixer = {
         .put = stac92xx_dmux_enum_put,
 };
 
+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;
@@ -827,6 +858,23 @@ static int stac92xx_build_controls(struct hda_codec *codec)
                 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;       
 }