ALSA: hda/via - Don't create duplicated boost controls

The driver may create duplicated mic boost controls when there are
multiple mics with the very same type / location, and this leads to
the error at actual kcontrol creation.  It needs to check the validity
of the created control and add a proper index if it's duplicated.

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

diff --git a/sound/pci/hda/patch_via.c b/sound/pci/hda/patch_via.c
index c7eb4d7d05c036e7900e352db5f01a0af4aa3c50..93d52fc605fba636b7a25f0bce74afa755ad97af 100644 (file)
--- a/sound/pci/hda/patch_via.c
+++ b/sound/pci/hda/patch_via.c
@@ -2474,6 +2474,8 @@ static int create_mic_boost_ctls(struct hda_codec *codec)
 {
        struct via_spec *spec = codec->spec;
        const struct auto_pin_cfg *cfg = &spec->autocfg;
+       const char *prev_label = NULL;
+       int type_idx = 0;
        int i, err;
 
        for (i = 0; i < cfg->num_inputs; i++) {
@@ -2488,8 +2490,13 @@ static int create_mic_boost_ctls(struct hda_codec *codec)
                if (caps == -1 || !(caps & AC_AMPCAP_NUM_STEPS))
                        continue;
                label = hda_get_autocfg_input_label(codec, cfg, i);
+               if (prev_label && !strcmp(label, prev_label))
+                       type_idx++;
+               else
+                       type_idx = 0;
+               prev_label = label;
                snprintf(name, sizeof(name), "%s Boost Volume", label);
-               err = via_add_control(spec, VIA_CTL_WIDGET_VOL, name,
+               err = __via_add_control(spec, VIA_CTL_WIDGET_VOL, name, type_idx,
                              HDA_COMPOSE_AMP_VAL(pin, 3, 0, HDA_INPUT));
                if (err < 0)
                        return err;