ALSA: hda: SPDIF stream muting support

Added support for muting S/DPIF outs using the 'Digital Playback Source' muxs on
supporting codecs.

Signed-off-by: Matthew Ranostay <mranostay@embeddedalley.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

1 files changed, 33 insertions, 2 deletions

diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index f9b256388921..05661f7f3ce1 100644
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -138,6 +138,7 @@ struct sigmatel_spec {
         unsigned int mic_switch: 1;
         unsigned int alt_switch: 1;
         unsigned int hp_detect: 1;
+        unsigned int spdif_mute: 1;
 
         /* gpio lines */
         unsigned int eapd_mask;
@@ -547,10 +548,32 @@ static int stac92xx_smux_enum_put(struct snd_kcontrol *kcontrol,
 {
         struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
         struct sigmatel_spec *spec = codec->spec;
+        struct hda_input_mux *smux = &spec->private_smux;
         unsigned int smux_idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);
+        int err, val;
+        hda_nid_t nid;
 
-        return snd_hda_input_mux_put(codec, spec->sinput_mux, ucontrol,
+        err = snd_hda_input_mux_put(codec, spec->sinput_mux, ucontrol,
                         spec->smux_nids[smux_idx], &spec->cur_smux[smux_idx]);
+        if (err < 0)
+                return err;
+
+        if (spec->spdif_mute) {
+                if (smux_idx == 0)
+                        nid = spec->multiout.dig_out_nid;
+                else
+                        nid = codec->slave_dig_outs[smux_idx - 1];
+                if (spec->cur_smux[smux_idx] == smux->num_items - 1)
+                        val = AMP_OUT_MUTE;
+                if (smux_idx == 0)
+                        nid = spec->multiout.dig_out_nid;
+                else
+                        nid = codec->slave_dig_outs[smux_idx - 1];
+                /* un/mute SPDIF out */
+                snd_hda_codec_write_cache(codec, nid, 0,
+                        AC_VERB_SET_AMP_GAIN_MUTE, val);
+        }
+        return 0;
 }
 
 static int stac92xx_mux_enum_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
@@ -1228,6 +1251,15 @@ static int stac92xx_build_controls(struct hda_codec *codec)
                         return err;
         }
         if (spec->num_smuxes > 0) {
+                int wcaps = get_wcaps(codec, spec->multiout.dig_out_nid);
+                struct hda_input_mux *smux = &spec->private_smux;
+                /* check for mute support on SPDIF out */
+                if (wcaps & AC_WCAP_OUT_AMP) {
+                        smux->items[smux->num_items].label = "Off";
+                        smux->items[smux->num_items].index = 0;
+                        smux->num_items++;
+                        spec->spdif_mute = 1;
+                }
                 stac_smux_mixer.count = spec->num_smuxes;
                 err = snd_ctl_add(codec->bus->card,
                                   snd_ctl_new1(&stac_smux_mixer, codec));
@@ -4377,7 +4409,6 @@ again:
 
         spec->num_muxes = ARRAY_SIZE(stac92hd71bxx_mux_nids);
         spec->num_adcs = ARRAY_SIZE(stac92hd71bxx_adc_nids);
-        spec->num_dmuxes = ARRAY_SIZE(stac92hd71bxx_dmux_nids);
 
         switch (spec->board_config) {
         case STAC_HP_M4: