[ALSA] hda-codec - Fix SPDIF output

Fix SPDIF output (at least on Realtek codecs).  The DIGI_CONVERT verbs
have to be reset before the PCM stream is set up.  Otherwise the digital
setup is screwed up.
Also, check the AMP capability before setting AMP of the digital out
widget.

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

1 files changed, 13 insertions, 1 deletions

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 4243c6b491fc..d3f7a3dab1c4 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -1916,6 +1916,17 @@ static int alc880_dig_playback_pcm_open(struct hda_pcm_stream *hinfo,
         return snd_hda_multi_out_dig_open(codec, &spec->multiout);
 }
 
+static int alc880_dig_playback_pcm_prepare(struct hda_pcm_stream *hinfo,
+                                           struct hda_codec *codec,
+                                           unsigned int stream_tag,
+                                           unsigned int format,
+                                           struct snd_pcm_substream *substream)
+{
+        struct alc_spec *spec = codec->spec;
+        return snd_hda_multi_out_dig_prepare(codec, &spec->multiout,
+                                             stream_tag, format, substream);
+}
+
 static int alc880_dig_playback_pcm_close(struct hda_pcm_stream *hinfo,
                                          struct hda_codec *codec,
                                          struct snd_pcm_substream *substream)
@@ -1984,7 +1995,8 @@ static struct hda_pcm_stream alc880_pcm_digital_playback = {
         /* NID is set in alc_build_pcms */
         .ops = {
                 .open = alc880_dig_playback_pcm_open,
-                .close = alc880_dig_playback_pcm_close
+                .close = alc880_dig_playback_pcm_close,
+                .prepare = alc880_dig_playback_pcm_prepare
         },
 };