ALSA: hda: slave digital out support

Added support for playing a stream on multiple digital outs. This is done
by defining codec->slave_dig_outs as array of hda_nid_t with a null-terminated entry to set the
slave SPDIF outs, in which the slave outs have cloned settings of the master out (e.g. dig_out_nid).

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

2 files changed, 51 insertions, 2 deletions

diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 4f3291150809..696d77e575ec 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -1454,12 +1454,22 @@ static int snd_hda_spdif_default_put(struct snd_kcontrol *kcontrol,
         codec->spdif_ctls = val;
 
         if (change) {
+                hda_nid_t *d;
                 snd_hda_codec_write_cache(codec, nid, 0,
                                           AC_VERB_SET_DIGI_CONVERT_1,
                                           val & 0xff);
                 snd_hda_codec_write_cache(codec, nid, 0,
                                           AC_VERB_SET_DIGI_CONVERT_2,
                                           val >> 8);
+
+                for (d = codec->slave_dig_outs; *d; d++) {
+                        snd_hda_codec_write_cache(codec, *d, 0,
+                                          AC_VERB_SET_DIGI_CONVERT_1,
+                                          val & 0xff);
+                        snd_hda_codec_write_cache(codec, *d, 0,
+                                          AC_VERB_SET_DIGI_CONVERT_2,
+                                          val >> 8);
+                }
         }
 
         mutex_unlock(&codec->spdif_mutex);
@@ -1491,10 +1501,16 @@ static int snd_hda_spdif_out_switch_put(struct snd_kcontrol *kcontrol,
                 val |= AC_DIG1_ENABLE;
         change = codec->spdif_ctls != val;
         if (change) {
+                hda_nid_t *d;
                 codec->spdif_ctls = val;
                 snd_hda_codec_write_cache(codec, nid, 0,
                                           AC_VERB_SET_DIGI_CONVERT_1,
                                           val & 0xff);
+
+                for (d = codec->slave_dig_outs; *d; d++)
+                        snd_hda_codec_write_cache(codec, *d, 0,
+                                          AC_VERB_SET_DIGI_CONVERT_1,
+                                          val & 0xff);
                 /* unmute amp switch (if any) */
                 if ((get_wcaps(codec, nid) & AC_WCAP_OUT_AMP) &&
                     (val & AC_DIG1_ENABLE))
@@ -1643,9 +1659,14 @@ static int snd_hda_spdif_in_switch_put(struct snd_kcontrol *kcontrol,
         mutex_lock(&codec->spdif_mutex);
         change = codec->spdif_in_enable != val;
         if (change) {
+                hda_nid_t *d;
                 codec->spdif_in_enable = val;
                 snd_hda_codec_write_cache(codec, nid, 0,
                                           AC_VERB_SET_DIGI_CONVERT_1, val);
+
+                for (d = codec->slave_dig_outs; *d; d++)
+                        snd_hda_codec_write_cache(codec, *d, 0,
+                                          AC_VERB_SET_DIGI_CONVERT_1, val);
         }
         mutex_unlock(&codec->spdif_mutex);
         return change;
@@ -2589,15 +2610,30 @@ int snd_hda_input_mux_put(struct hda_codec *codec,
 static void setup_dig_out_stream(struct hda_codec *codec, hda_nid_t nid,
                                  unsigned int stream_tag, unsigned int format)
 {
+        hda_nid_t *d;
+
         /* turn off SPDIF once; otherwise the IEC958 bits won't be updated */
-        if (codec->spdif_status_reset && (codec->spdif_ctls & AC_DIG1_ENABLE))
+        if (codec->spdif_status_reset && (codec->spdif_ctls & AC_DIG1_ENABLE)) {
                 snd_hda_codec_write(codec, nid, 0, AC_VERB_SET_DIGI_CONVERT_1,
+                            codec->spdif_ctls & ~AC_DIG1_ENABLE & 0xff);
+
+                for (d = codec->slave_dig_outs; *d; d++)
+                        snd_hda_codec_write(codec, *d, 0,
+                                        AC_VERB_SET_DIGI_CONVERT_1,
                                     codec->spdif_ctls & ~AC_DIG1_ENABLE & 0xff);
+        }
         snd_hda_codec_setup_stream(codec, nid, stream_tag, 0, format);
         /* turn on again (if needed) */
-        if (codec->spdif_status_reset && (codec->spdif_ctls & AC_DIG1_ENABLE))
+        if (codec->spdif_status_reset && (codec->spdif_ctls & AC_DIG1_ENABLE)) {
                 snd_hda_codec_write(codec, nid, 0, AC_VERB_SET_DIGI_CONVERT_1,
                                     codec->spdif_ctls & 0xff);
+
+                for (d = codec->slave_dig_outs; *d; d++)
+                        snd_hda_codec_write(codec, *d, 0,
+                                        AC_VERB_SET_DIGI_CONVERT_1,
+                                    codec->spdif_ctls & 0xff);
+        }
+
 }
 
 /*
@@ -2621,8 +2657,12 @@ int snd_hda_multi_out_dig_prepare(struct hda_codec *codec,
                                   unsigned int format,
                                   struct snd_pcm_substream *substream)
 {
+        hda_nid_t *nid;
         mutex_lock(&codec->spdif_mutex);
         setup_dig_out_stream(codec, mout->dig_out_nid, stream_tag, format);
+        if (codec->slave_dig_outs)
+                for (nid = codec->slave_dig_outs; *nid; nid++)
+                        setup_dig_out_stream(codec, *nid, stream_tag, format);
         mutex_unlock(&codec->spdif_mutex);
         return 0;
 }
@@ -2689,6 +2729,7 @@ int snd_hda_multi_out_analog_prepare(struct hda_codec *codec,
                                      struct snd_pcm_substream *substream)
 {
         hda_nid_t *nids = mout->dac_nids;
+        hda_nid_t *d;
         int chs = substream->runtime->channels;
         int i;
 
@@ -2702,9 +2743,16 @@ int snd_hda_multi_out_analog_prepare(struct hda_codec *codec,
                         mout->dig_out_used = HDA_DIG_ANALOG_DUP;
                         setup_dig_out_stream(codec, mout->dig_out_nid,
                                              stream_tag, format);
+                        if (codec->slave_dig_outs)
+                                for (d = codec->slave_dig_outs; *d; d++)
+                                        setup_dig_out_stream(codec, *d,
+                                                stream_tag, format);
                 } else {
                         mout->dig_out_used = 0;
                         snd_hda_codec_cleanup_stream(codec, mout->dig_out_nid);
+                        if (codec->slave_dig_outs)
+                                for (d = codec->slave_dig_outs; *d; d++)
+                                        snd_hda_codec_cleanup_stream(codec, *d);
                 }
         }
         mutex_unlock(&codec->spdif_mutex);
diff --git a/sound/pci/hda/hda_codec.h b/sound/pci/hda/hda_codec.h
index 780e2fffae3a..60468f562400 100644
--- a/sound/pci/hda/hda_codec.h
+++ b/sound/pci/hda/hda_codec.h
@@ -725,6 +725,7 @@ struct hda_codec {
         unsigned int spdif_status;      /* IEC958 status bits */
         unsigned short spdif_ctls;      /* SPDIF control bits */
         unsigned int spdif_in_enable;   /* SPDIF input enable? */
+        hda_nid_t *slave_dig_outs; /* optional digital out slave widgets */
 
         struct snd_hwdep *hwdep;        /* assigned hwdep device */