[PATCH 17/30] ALSA: HDA VIA: Add 2nd S/PDIF out for VT1708S and VT1702.

[Logan Li <loganli@viatech.com.cn>]

From: Lydia Wang <lydiawang@viatech.com.cn>
Subject: ALSA: HDA VIA: Add 2nd S/PDIF out for VT1708S and VT1702.

Signed-off-by: Lydia Wang <lydiawang@viatech.com.cn>
Signed-off-by: Logan Li <loganli@viatech.com.cn>

---
 sound/pci/hda/patch_via.c |   37 +++++++++++++++++++++++++++----------
 1 file changed, 27 insertions(+), 10 deletions(-)

--- a/sound/pci/hda/patch_via.c
+++ b/sound/pci/hda/patch_via.c
@@ -107,7 +107,7 @@
 
 	/* playback */
 	struct hda_multi_out multiout;
-	hda_nid_t slave_dig_outs[2];
+	hda_nid_t second_dig_out;
 
 	/* capture */
 	unsigned int num_adc_nids;
@@ -1179,8 +1179,23 @@
 					struct snd_pcm_substream *substream)
 {
 	struct via_spec *spec = codec->spec;
-	return snd_hda_multi_out_dig_prepare(codec, &spec->multiout,
-					     stream_tag, format, substream);
+	hda_nid_t nid = substream->number == 0
+		? spec->multiout.dig_out_nid : spec->second_dig_out;
+	mutex_lock(&codec->spdif_mutex);
+	/* copy from hda_codec.c: setup_dig_out_stream */
+	/* turn off SPDIF once; otherwise the IEC958 bits won't be updated */
+	if (codec->spdif_status_reset && (codec->spdif_ctls & AC_DIG1_ENABLE))
+		snd_hda_codec_write_cache(
+			codec, nid, 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))
+		snd_hda_codec_write_cache(
+			codec, nid, 0, AC_VERB_SET_DIGI_CONVERT_1,
+			codec->spdif_ctls & 0xff);
+	mutex_unlock(&codec->spdif_mutex);
+	return 0;
 }
 
 static int via_dig_playback_pcm_cleanup(struct hda_pcm_stream *hinfo,
@@ -1298,6 +1313,13 @@
 		if (err < 0)
 			return err;
 		spec->multiout.share_spdif = 1;
+		/* add second spdif out */
+		if (spec->second_dig_out) {
+			err = snd_hda_create_spdif_out_ctls(
+				codec, spec->second_dig_out);
+			if (err < 0)
+				return err;
+		}
 	}
 	if (spec->dig_in_nid) {
 		err = snd_hda_create_spdif_in_ctls(codec, spec->dig_in_nid);
@@ -1472,11 +1494,6 @@
 	} else /* enable SPDIF-input pin */
 		snd_hda_codec_write(codec, spec->autocfg.dig_in_pin, 0,
 				    AC_VERB_SET_PIN_WIDGET_CONTROL, PIN_IN);
-
-	/* assign slave outs */
-	if (spec->slave_dig_outs[0])
-		codec->slave_dig_outs = spec->slave_dig_outs;
-
  	return 0;
 }
 
@@ -3164,7 +3181,7 @@
 };
 
 static struct hda_pcm_stream vt1708S_pcm_digital_playback = {
-	.substreams = 1,
+	.substreams = 2,
 	.channels_min = 2,
 	.channels_max = 2,
 	/* NID is set in via_build_pcms */
@@ -3400,7 +3417,7 @@
 		if (!spec->multiout.dig_out_nid)
 			spec->multiout.dig_out_nid = nid;
 		else {
-			spec->slave_dig_outs[0] = nid;
+			spec->second_dig_out = nid;
 			break; /* at most two dig outs */
 		}
 	}