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Subject[PATCH] ALSA: hda - Mute headphone pin on suspend on XPS13 9333
Date
Muting the headphone output pin right before the codec suspension
prevents pop noises when headphones are plugged in (except for a
barely audible click noise).
This solution allows to truly save some power when headphones are
plugged in unlike the previous solution (033b0a7ca9c:
"ALSA: hda - Pop noises fix for XPS13 9333")

Signed-off-by: Gabriele Mazzotta <gabriele.mzt@gmail.com>
---
sound/pci/hda/patch_realtek.c | 17 +++++++----------
1 file changed, 7 insertions(+), 10 deletions(-)

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index b18b9c6..231d0e4 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -4176,17 +4176,15 @@ static void alc_fixup_disable_aamix(struct hda_codec *codec,
}
}

-static unsigned int alc_power_filter_xps13(struct hda_codec *codec,
- hda_nid_t nid,
- unsigned int power_state)
+static void alc_shutup_dell_xps13(struct hda_codec *codec)
{
struct alc_spec *spec = codec->spec;
+ int hp_pin = spec->gen.autocfg.hp_pins[0];

- /* Avoid pop noises when headphones are plugged in */
- if (spec->gen.hp_jack_present)
- if (nid == codec->core.afg || nid == 0x02 || nid == 0x15)
- return AC_PWRST_D0;
- return snd_hda_gen_path_power_filter(codec, nid, power_state);
+ /* Prevent pop noises when headphones are plugged in */
+ snd_hda_codec_write(codec, hp_pin, 0,
+ AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_MUTE);
+ msleep(20);
}

static void alc_fixup_dell_xps13(struct hda_codec *codec,
@@ -4197,8 +4195,7 @@ static void alc_fixup_dell_xps13(struct hda_codec *codec,
struct hda_input_mux *imux = &spec->gen.input_mux;
int i;

- spec->shutup = alc_no_shutup;
- codec->power_filter = alc_power_filter_xps13;
+ spec->shutup = alc_shutup_dell_xps13;

/* Make the internal mic the default input source. */
for (i = 0; i < imux->num_items; i++) {
--
2.1.4


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