ALSA: hda - Fix noise problems on Thinkpad T440s

Lenovo Thinkpad T440s suffers from constant background noises, and it
seems to be a generic hardware issue on this model:
  https://forums.lenovo.com/t5/ThinkPad-T400-T500-and-newer-T/T440s-speaker-noise/td-p/1339883

As the noise comes from the analog loopback path, disabling the path
is the easy workaround.

Also, the machine gives significant cracking noises at PM suspend.  A
workaround found by trial-and-error is to disable the shutup callback
currently used for ALC269-variant.

This patch addresses these noise issues by introducing a new fixup
chain.  Although the same workaround might be applicable to other
Thinkpad models, it's applied only to T440s (17aa:220c) in this patch,
so far, just to be safe (you chicken!).  As a compromise, a new model
option string "tp440" is provided now, though, so that owners of other
Thinkpad models can test it more easily.

Bugzilla: https://bugzilla.opensuse.org/show_bug.cgi?id=958504
Reported-and-tested-by: Tim Hardeck <thardeck@suse.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 49b1d366f82a35d43bb91f1f02b306bd1ff40073..8dd2ac13b3af19ce79fdf5e5e35943ff1f5dfef8 100644 (file)
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -4204,6 +4204,18 @@ static void alc_fixup_tpt440_dock(struct hda_codec *codec,
        }
 }
 
+/* additional fixup for Thinkpad T440s noise problem */
+static void alc_fixup_tpt440(struct hda_codec *codec,
+                                 const struct hda_fixup *fix, int action)
+{
+       struct alc_spec *spec = codec->spec;
+
+       if (action == HDA_FIXUP_ACT_PRE_PROBE) {
+               spec->shutup = alc_no_shutup; /* reduce click noise */
+               spec->gen.mixer_nid = 0; /* reduce background noise */
+       }
+}
+
 static void alc_shutup_dell_xps13(struct hda_codec *codec)
 {
        struct alc_spec *spec = codec->spec;
@@ -4578,6 +4590,7 @@ enum {
        ALC255_FIXUP_HEADSET_MODE_NO_HP_MIC,
        ALC293_FIXUP_DELL1_MIC_NO_PRESENCE,
        ALC292_FIXUP_TPT440_DOCK,
+       ALC292_FIXUP_TPT440,
        ALC283_FIXUP_BXBT2807_MIC,
        ALC255_FIXUP_DELL_WMI_MIC_MUTE_LED,
        ALC282_FIXUP_ASPIRE_V5_PINS,
@@ -5051,6 +5064,12 @@ static const struct hda_fixup alc269_fixups[] = {
                .chained = true,
                .chain_id = ALC269_FIXUP_LIMIT_INT_MIC_BOOST
        },
+       [ALC292_FIXUP_TPT440] = {
+               .type = HDA_FIXUP_FUNC,
+               .v.func = alc_fixup_tpt440,
+               .chained = true,
+               .chain_id = ALC292_FIXUP_TPT440_DOCK,
+       },
        [ALC283_FIXUP_BXBT2807_MIC] = {
                .type = HDA_FIXUP_PINS,
                .v.pins = (const struct hda_pintbl[]) {
@@ -5332,7 +5351,7 @@ static const struct snd_pci_quirk alc269_fixup_tbl[] = {
        SND_PCI_QUIRK(0x17aa, 0x21fb, "Thinkpad T430s", ALC269_FIXUP_LENOVO_DOCK),
        SND_PCI_QUIRK(0x17aa, 0x2203, "Thinkpad X230 Tablet", ALC269_FIXUP_LENOVO_DOCK),
        SND_PCI_QUIRK(0x17aa, 0x2208, "Thinkpad T431s", ALC269_FIXUP_LENOVO_DOCK),
-       SND_PCI_QUIRK(0x17aa, 0x220c, "Thinkpad T440s", ALC292_FIXUP_TPT440_DOCK),
+       SND_PCI_QUIRK(0x17aa, 0x220c, "Thinkpad T440s", ALC292_FIXUP_TPT440),
        SND_PCI_QUIRK(0x17aa, 0x220e, "Thinkpad T440p", ALC292_FIXUP_TPT440_DOCK),
        SND_PCI_QUIRK(0x17aa, 0x2210, "Thinkpad T540p", ALC292_FIXUP_TPT440_DOCK),
        SND_PCI_QUIRK(0x17aa, 0x2211, "Thinkpad W541", ALC292_FIXUP_TPT440_DOCK),
@@ -5432,6 +5451,7 @@ static const struct hda_model_fixup alc269_fixup_models[] = {
        {.id = ALC283_FIXUP_CHROME_BOOK, .name = "alc283-dac-wcaps"},
        {.id = ALC283_FIXUP_SENSE_COMBO_JACK, .name = "alc283-sense-combo"},
        {.id = ALC292_FIXUP_TPT440_DOCK, .name = "tpt440-dock"},
+       {.id = ALC292_FIXUP_TPT440, .name = "tpt440"},
        {}
 };