ALSA: hda - Support multiple digital outs with auto-probing

Added the support of multiple digital outputs via auto-probing for
Realtek ALC88x codecs.  The multiple outputs are handled as slave
streams, so only one PCM stream (and the corresponding IEC958*
elements) is provided to control both digital outputs.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 19 insertions, 3 deletions

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index ef9b7ee34100..244de597c5be 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -279,6 +279,7 @@ struct alc_spec {
                                          * dig_out_nid and hp_nid are optional
                                          */
         hda_nid_t alt_dac_nid;
+        hda_nid_t slave_dig_outs[3];    /* optional - for auto-parsing */
         int dig_out_type;
 
         /* capture */
@@ -4269,7 +4270,7 @@ static void alc880_auto_init_analog_input(struct hda_codec *codec)
 static int alc880_parse_auto_config(struct hda_codec *codec)
 {
         struct alc_spec *spec = codec->spec;
-        int err;
+        int i, err;
         static hda_nid_t alc880_ignore[] = { 0x1d, 0 };
 
         err = snd_hda_parse_pin_def_config(codec, &spec->autocfg,
@@ -4300,8 +4301,23 @@ static int alc880_parse_auto_config(struct hda_codec *codec)
 
         spec->multiout.max_channels = spec->multiout.num_dacs * 2;
 
-        if (spec->autocfg.dig_outs)
-                spec->multiout.dig_out_nid = ALC880_DIGOUT_NID;
+        /* check multiple SPDIF-out (for recent codecs) */
+        for (i = 0; i < spec->autocfg.dig_outs; i++) {
+                hda_nid_t dig_nid;
+                err = snd_hda_get_connections(codec,
+                                              spec->autocfg.dig_out_pins[i],
+                                              &dig_nid, 1);
+                if (err < 0)
+                        continue;
+                if (!i)
+                        spec->multiout.dig_out_nid = dig_nid;
+                else {
+                        spec->multiout.slave_dig_outs = spec->slave_dig_outs;
+                        spec->slave_dig_outs[i - 1] = dig_nid;
+                        if (i == ARRAY_SIZE(spec->slave_dig_outs) - 1)
+                                break;
+                }
+        }
         if (spec->autocfg.dig_in_pin)
                 spec->dig_in_nid = ALC880_DIGIN_NID;