1 files changed, 33 insertions, 2 deletions

diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 37c413923db8..ab3bb7997cd2 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -1037,16 +1037,24 @@ void snd_hda_set_vmaster_tlv(struct hda_codec *codec, hda_nid_t nid, int dir,
 }
 
 /* find a mixer control element with the given name */
-struct snd_kcontrol *snd_hda_find_mixer_ctl(struct hda_codec *codec,
-                                            const char *name)
+static struct snd_kcontrol *
+_snd_hda_find_mixer_ctl(struct hda_codec *codec,
+                        const char *name, int idx)
 {
         struct snd_ctl_elem_id id;
         memset(&id, 0, sizeof(id));
         id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
+        id.index = idx;
         strcpy(id.name, name);
         return snd_ctl_find_id(codec->bus->card, &id);
 }
 
+struct snd_kcontrol *snd_hda_find_mixer_ctl(struct hda_codec *codec,
+                                            const char *name)
+{
+        return _snd_hda_find_mixer_ctl(codec, name, 0);
+}
+
 /* create a virtual master control and add slaves */
 int snd_hda_add_vmaster(struct hda_codec *codec, char *name,
                         unsigned int *tlv, const char **slaves)
@@ -1481,6 +1489,8 @@ static struct snd_kcontrol_new dig_mixes[] = {
         { } /* end */
 };
 
+#define SPDIF_MAX_IDX   4       /* 4 instances should be enough to probe */
+
 /**
  * snd_hda_create_spdif_out_ctls - create Output SPDIF-related controls
  * @codec: the HDA codec
@@ -1496,9 +1506,20 @@ int snd_hda_create_spdif_out_ctls(struct hda_codec *codec, hda_nid_t nid)
         int err;
         struct snd_kcontrol *kctl;
         struct snd_kcontrol_new *dig_mix;
+        int idx;
 
+        for (idx = 0; idx < SPDIF_MAX_IDX; idx++) {
+                if (!_snd_hda_find_mixer_ctl(codec, "IEC958 Playback Switch",
+                                             idx))
+                        break;
+        }
+        if (idx >= SPDIF_MAX_IDX) {
+                printk(KERN_ERR "hda_codec: too many IEC958 outputs\n");
+                return -EBUSY;
+        }
         for (dig_mix = dig_mixes; dig_mix->name; dig_mix++) {
                 kctl = snd_ctl_new1(dig_mix, codec);
+                kctl->id.index = idx;
                 kctl->private_value = nid;
                 err = snd_ctl_add(codec->bus->card, kctl);
                 if (err < 0)
@@ -1595,7 +1616,17 @@ int snd_hda_create_spdif_in_ctls(struct hda_codec *codec, hda_nid_t nid)
         int err;
         struct snd_kcontrol *kctl;
         struct snd_kcontrol_new *dig_mix;
+        int idx;
 
+        for (idx = 0; idx < SPDIF_MAX_IDX; idx++) {
+                if (!_snd_hda_find_mixer_ctl(codec, "IEC958 Capture Switch",
+                                             idx))
+                        break;
+        }
+        if (idx >= SPDIF_MAX_IDX) {
+                printk(KERN_ERR "hda_codec: too many IEC958 inputs\n");
+                return -EBUSY;
+        }
         for (dig_mix = dig_in_ctls; dig_mix->name; dig_mix++) {
                 kctl = snd_ctl_new1(dig_mix, codec);
                 kctl->private_value = nid;