[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, 14 insertions, 1 deletions

diff --git a/sound/pci/hda/patch_conexant.c b/sound/pci/hda/patch_conexant.c
index efb95dc2d6db..2349b5eb5aaa 100644
--- a/sound/pci/hda/patch_conexant.c
+++ b/sound/pci/hda/patch_conexant.c
@@ -136,6 +136,18 @@ static int conexant_dig_playback_pcm_close(struct hda_pcm_stream *hinfo,
         return snd_hda_multi_out_dig_close(codec, &spec->multiout);
 }
 
+static int conexant_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 conexant_spec *spec = codec->spec;
+        return snd_hda_multi_out_dig_prepare(codec, &spec->multiout,
+                                             stream_tag,
+                                             format, substream);
+}
+
 /*
  * Analog capture
  */
@@ -194,7 +206,8 @@ static struct hda_pcm_stream conexant_pcm_digital_playback = {
         .nid = 0, /* fill later */
         .ops = {
                 .open = conexant_dig_playback_pcm_open,
-                .close = conexant_dig_playback_pcm_close
+                .close = conexant_dig_playback_pcm_close,
+                .prepare = conexant_dig_playback_pcm_prepare
         },
 };