ALSA: hda - Preserve input pin-ctl bits in HP-automute for VIA codec

For smart51 pins, we need to preserve the input pin-control bits at
auto-mute controls instead of overwriting zero or pin-out-only.
Otherwise the VREF won't be set properly when smart51 is disabled
again.

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

1 files changed, 11 insertions, 3 deletions

diff --git a/sound/pci/hda/patch_via.c b/sound/pci/hda/patch_via.c
index 27de53fb331e..77df2bedfb81 100644
--- a/sound/pci/hda/patch_via.c
+++ b/sound/pci/hda/patch_via.c
@@ -1509,10 +1509,18 @@ static void toggle_output_mutes(struct hda_codec *codec, int num_pins,
                                 hda_nid_t *pins, bool mute)
 {
         int i;
-        for (i = 0; i < num_pins; i++)
+        for (i = 0; i < num_pins; i++) {
+                unsigned int parm = snd_hda_codec_read(codec, pins[i], 0,
+                                          AC_VERB_GET_PIN_WIDGET_CONTROL, 0);
+                if (parm & AC_PINCTL_IN_EN)
+                        continue;
+                if (mute)
+                        parm &= ~AC_PINCTL_OUT_EN;
+                else
+                        parm |= AC_PINCTL_OUT_EN;
                 snd_hda_codec_write(codec, pins[i], 0,
-                                    AC_VERB_SET_PIN_WIDGET_CONTROL,
-                                    mute ? 0 : PIN_OUT);
+                                    AC_VERB_SET_PIN_WIDGET_CONTROL, parm);
+        }
 }
 
 /* mute internal speaker if line-out is plugged */