[ALSA] hda: fix Mic in as output

Some laptop has an internal analog microphone that is 'fixed'.
This patch prevents creating a 'Mic In as Output' switch for
ports that can't be outputs.

Signed-off-by: Matthew Ranostay <mranostay@embeddedalley.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

1 files changed, 16 insertions, 8 deletions

diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index 7c8cd59852ec..caf48edaa921 100644
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -2283,15 +2283,23 @@ static int stac92xx_auto_create_multi_out_ctls(struct hda_codec *codec,
         }
 
         if (spec->mic_switch) {
+                unsigned int def_conf;
                 nid = cfg->input_pins[AUTO_PIN_MIC];
-                pincap = snd_hda_param_read(codec, nid,
-                                                AC_PAR_PIN_CAP);
-                if (pincap & AC_PINCAP_OUT) {
-                        err = stac92xx_add_control(spec,
-                                STAC_CTL_WIDGET_IO_SWITCH,
-                                "Mic as Output Switch", (nid << 8) | 1);
-                        if (err < 0)
-                                return err;
+                def_conf = snd_hda_codec_read(codec, nid, 0,
+                                                AC_VERB_GET_CONFIG_DEFAULT, 0);
+
+                /* some laptops have an internal analog microphone
+                 * which can't be used as a output */
+                if (get_defcfg_connect(def_conf) != AC_JACK_PORT_FIXED) {
+                        pincap = snd_hda_param_read(codec, nid,
+                                                        AC_PAR_PIN_CAP);
+                        if (pincap & AC_PINCAP_OUT) {
+                                err = stac92xx_add_control(spec,
+                                        STAC_CTL_WIDGET_IO_SWITCH,
+                                        "Mic as Output Switch", (nid << 8) | 1);
+                                if (err < 0)
+                                        return err;
+                        }
                 }
         }