ALSA: hda - Disable IDT eapd_switch if there are no internal speakers

If there are no internal speakers, we should not turn the eapd switch
off, because it might be necessary to keep high for Headphone.

BugLink: https://bugs.launchpad.net/bugs/1155016
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index 83d5335ac348ee2c3b7a3f7e243f7d5ad8096045..dafe04ae8c72b6ba711d7f8dce4ac7878552b883 100644 (file)
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -815,6 +815,29 @@ static int find_mute_led_cfg(struct hda_codec *codec, int default_polarity)
        return 0;
 }
 
+/* check whether a built-in speaker is included in parsed pins */
+static bool has_builtin_speaker(struct hda_codec *codec)
+{
+       struct sigmatel_spec *spec = codec->spec;
+       hda_nid_t *nid_pin;
+       int nids, i;
+
+       if (spec->gen.autocfg.line_out_type == AUTO_PIN_SPEAKER_OUT) {
+               nid_pin = spec->gen.autocfg.line_out_pins;
+               nids = spec->gen.autocfg.line_outs;
+       } else {
+               nid_pin = spec->gen.autocfg.speaker_pins;
+               nids = spec->gen.autocfg.speaker_outs;
+       }
+
+       for (i = 0; i < nids; i++) {
+               unsigned int def_conf = snd_hda_codec_get_pincfg(codec, nid_pin[i]);
+               if (snd_hda_get_input_pin_attr(def_conf) == INPUT_PIN_ATTR_INT)
+                       return true;
+       }
+       return false;
+}
+
 /*
  * PC beep controls
  */
@@ -3890,6 +3913,12 @@ static int patch_stac92hd73xx(struct hda_codec *codec)
                return err;
        }
 
+       /* Don't GPIO-mute speakers if there are no internal speakers, because
+        * the GPIO might be necessary for Headphone
+        */
+       if (spec->eapd_switch && !has_builtin_speaker(codec))
+               spec->eapd_switch = 0;
+
        codec->proc_widget_hook = stac92hd7x_proc_hook;
 
        snd_hda_apply_fixup(codec, HDA_FIXUP_ACT_PROBE);