ALSA: hda - Fix click noise at start on Dell XPS13

Dell XPS13 produces a click noise at boot up, and Gabriele spotted out
that it's triggered by the initial pin control of the mic (NID 0x19).
This has to be set to Hi-Z Vref while the driver initializes to Vref
80% as a normal mic.

This patch fixes the generic parser code not to override the target
vref if it has been already set by the driver, and adds a proper
initialization of the target vref for this pin in the Realtek driver
side.

Reported-and-tested-by: Gabriele Mazzotta <gabriele.mzt@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/hda/hda_generic.c b/sound/pci/hda/hda_generic.c
index 3d2597b..788f969 100644 (file)
--- a/sound/pci/hda/hda_generic.c
+++ b/sound/pci/hda/hda_generic.c
@@ -3259,7 +3259,8 @@ static int create_input_ctls(struct hda_codec *codec)
                val = PIN_IN;
                if (cfg->inputs[i].type == AUTO_PIN_MIC)
                        val |= snd_hda_get_default_vref(codec, pin);
-               if (pin != spec->hp_mic_pin)
+               if (pin != spec->hp_mic_pin &&
+                   !snd_hda_codec_get_pin_target(codec, pin))
                        set_pin_target(codec, pin, val, false);
 
                if (mixer) {

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 06199e4..e2afd53 100644 (file)
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -4190,11 +4190,18 @@ static void alc_shutup_dell_xps13(struct hda_codec *codec)
 static void alc_fixup_dell_xps13(struct hda_codec *codec,
                                const struct hda_fixup *fix, int action)
 {
-       if (action == HDA_FIXUP_ACT_PROBE) {
-               struct alc_spec *spec = codec->spec;
-               struct hda_input_mux *imux = &spec->gen.input_mux;
-               int i;
+       struct alc_spec *spec = codec->spec;
+       struct hda_input_mux *imux = &spec->gen.input_mux;
+       int i;
 
+       switch (action) {
+       case HDA_FIXUP_ACT_PRE_PROBE:
+               /* mic pin 0x19 must be initialized with Vref Hi-Z, otherwise
+                * it causes a click noise at start up
+                */
+               snd_hda_codec_set_pin_target(codec, 0x19, PIN_VREFHIZ);
+               break;
+       case HDA_FIXUP_ACT_PROBE:
                spec->shutup = alc_shutup_dell_xps13;
 
                /* Make the internal mic the default input source. */
@@ -4204,6 +4211,7 @@ static void alc_fixup_dell_xps13(struct hda_codec *codec,
                                break;
                        }
                }
+               break;
        }
 }