[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_cmedia.c b/sound/pci/hda/patch_cmedia.c
index 5b9d3a31a1ae..3c722e667bc8 100644
--- a/sound/pci/hda/patch_cmedia.c
+++ b/sound/pci/hda/patch_cmedia.c
@@ -497,6 +497,17 @@ static int cmi9880_dig_playback_pcm_close(struct hda_pcm_stream *hinfo,
         return snd_hda_multi_out_dig_close(codec, &spec->multiout);
 }
 
+static int cmi9880_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 cmi_spec *spec = codec->spec;
+        return snd_hda_multi_out_dig_prepare(codec, &spec->multiout, stream_tag,
+                                             format, substream);
+}
+
 /*
  * Analog capture
  */
@@ -556,7 +567,8 @@ static struct hda_pcm_stream cmi9880_pcm_digital_playback = {
         /* NID is set in cmi9880_build_pcms */
         .ops = {
                 .open = cmi9880_dig_playback_pcm_open,
-                .close = cmi9880_dig_playback_pcm_close
+                .close = cmi9880_dig_playback_pcm_close,
+                .prepare = cmi9880_dig_playback_pcm_prepare
         },
 };