CHROMIUM: ALSA: hda/realtek - Check mic jack state when headphone jack state changes.

Usually the mic jack state changes will generate an unsol mic event,
and we can do auto-mic-switching at that time. But if the mic jack state
is gated by the headphone jack state, there may be no unsol mic event,
and we need to do auto-mic-switching in the unsol headphone event handler.

BUG=chromium:221938
TEST=plug/unplug 3.5mm headset and observe the capture source is switched correctly.
Signed-off-by: Chih-Chung Chang <chihchung@chromium.org>
Change-Id: If057cc20b951fff05af1d6842cbc8e197a93a3f3
Reviewed-on: https://gerrit.chromium.org/gerrit/47231

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index b0af2dc..8f915ea 100644 (file)
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -189,6 +189,7 @@ struct alc_spec {
        unsigned int vol_in_capsrc:1; /* use capsrc volume (ADC has no vol) */
        unsigned int parse_flags; /* passed to snd_hda_parse_pin_defcfg() */
        unsigned int shared_mic_hp:1; /* HP/Mic-in sharing */
+       unsigned int ext_mic_gated:1; /* if the ext mic is gated by hp */
 
        /* auto-mute control */
        int automute_mode;
@@ -658,9 +659,15 @@ static void alc_mic_automute(struct hda_codec *codec)
 /* handle the specified unsol action (ALC_XXX_EVENT) */
 static void alc_exec_unsol_event(struct hda_codec *codec, int action)
 {
+       struct alc_spec *spec = codec->spec;
+
        switch (action) {
        case ALC_HP_EVENT:
                alc_hp_automute(codec);
+               /* If the ext mic is gated by hp, the ext mic plugged state may
+                * change when hp plugged state changes. */
+               if (spec->ext_mic_gated)
+                       alc_mic_automute(codec);
                break;
        case ALC_FRONT_EVENT:
                alc_line_automute(codec);
@@ -5997,9 +6004,11 @@ static void alc271_hp_gate_mic_jack(struct hda_codec *codec,
 {
        struct alc_spec *spec = codec->spec;
 
-       if (action == ALC_FIXUP_ACT_PROBE)
+       if (action == ALC_FIXUP_ACT_PROBE) {
+               spec->ext_mic_gated = 1;
                snd_hda_jack_set_gating_jack(codec, spec->ext_mic_pin,
                                             spec->autocfg.hp_pins[0]);
+       }
 }
 
 enum {