[PATCH] ALSA: hda/realtek - Enable the subwoofer of ASUS UX431FLC

[Chris Chiu <chiu@endlessm.com>]

From: Chris Chiu <chiu@endlessm.com>

ASUS reported that there's an additional speaker which serves as
the subwoofer and uses DAC 0x02. It does not work with the commit
73a723348a43 ("ALSA: hda/realtek - Enable internal speaker of ASUS
UX431FLC") which enables the amplifier and front speakers. This
commit enables the subwoofer to improve the acoustic experience.

Signed-off-by: Chris Chiu <chiu@endlessm.com>
Signed-off-by: Jian-Hong Pan <jian-hong@endlessm.com>
---
 sound/pci/hda/patch_realtek.c | 28 ++++++++++++++++++++++------
 1 file changed, 22 insertions(+), 6 deletions(-)

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index fada1ff61353..0193a8722be2 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -5576,6 +5576,16 @@ static void alc295_fixup_disable_dac3(struct hda_codec *codec,
 	}
 }
 
+/* Fixed DAC (0x02) on NID 0x17 to enable the mono speaker */
+static void alc294_fixup_fixed_dac_subwoofer(struct hda_codec *codec,
+					const struct hda_fixup *fix, int action)
+{
+	if (action == HDA_FIXUP_ACT_PRE_PROBE) {
+		hda_nid_t conn[1] = { 0x02 };
+		snd_hda_override_conn_list(codec, 0x17, 1, conn);
+	}
+}
+
 /* Hook to update amp GPIO4 for automute */
 static void alc280_hp_gpio4_automute_hook(struct hda_codec *codec,
 					  struct hda_jack_callback *jack)
@@ -5950,7 +5960,8 @@ enum {
 	ALC269VC_FIXUP_ACER_HEADSET_MIC,
 	ALC294_FIXUP_ASUS_INTSPK_HEADSET_MIC,
 	ALC256_FIXUP_MEDION_HEADSET_NO_PRESENCE,
-	ALC294_FIXUP_ASUS_INTSPK_GPIO,
+	ALC294_FIXUP_ASUS_DUAL_SPEAKERS,
+	ALC294_FIXUP_FIXED_DAC_SUBWOOFER,
 };
 
 static const struct hda_fixup alc269_fixups[] = {
@@ -7097,10 +7108,9 @@ static const struct hda_fixup alc269_fixups[] = {
 			{ }
 		}
 	},
-	[ALC294_FIXUP_ASUS_INTSPK_HEADSET_MIC] = {
+	[ALC294_FIXUP_ASUS_HEADSET_MIC] = {
 		.type = HDA_FIXUP_PINS,
 		.v.pins = (const struct hda_pintbl[]) {
-			{ 0x14, 0x411111f0 }, /* disable confusing internal speaker */
 			{ 0x19, 0x04a11150 }, /* use as headset mic, without its own jack detect */
 			{ }
 		},
@@ -7117,12 +7127,18 @@ static const struct hda_fixup alc269_fixups[] = {
 		.chained = true,
 		.chain_id = ALC256_FIXUP_ASUS_HEADSET_MODE
 	},
-	[ALC294_FIXUP_ASUS_INTSPK_GPIO] = {
+	[ALC294_FIXUP_FIXED_DAC_SUBWOOFER] = {
+		.type = HDA_FIXUP_FUNC,
+		.v.func = alc294_fixup_fixed_dac_subwoofer,
+		.chained = true,
+		.chain_id = ALC294_FIXUP_ASUS_HEADSET_MIC
+	},
+	[ALC294_FIXUP_ASUS_DUAL_SPEAKERS] = {
 		.type = HDA_FIXUP_FUNC,
 		/* The GPIO must be pulled to initialize the AMP */
 		.v.func = alc_fixup_gpio4,
 		.chained = true,
-		.chain_id = ALC294_FIXUP_ASUS_INTSPK_HEADSET_MIC
+		.chain_id = ALC294_FIXUP_FIXED_DAC_SUBWOOFER
 	},
 };
 
@@ -7291,7 +7307,7 @@ static const struct snd_pci_quirk alc269_fixup_tbl[] = {
 	SND_PCI_QUIRK(0x1043, 0x1427, "Asus Zenbook UX31E", ALC269VB_FIXUP_ASUS_ZENBOOK),
 	SND_PCI_QUIRK(0x1043, 0x1517, "Asus Zenbook UX31A", ALC269VB_FIXUP_ASUS_ZENBOOK_UX31A),
 	SND_PCI_QUIRK(0x1043, 0x16e3, "ASUS UX50", ALC269_FIXUP_STEREO_DMIC),
-	SND_PCI_QUIRK(0x1043, 0x17d1, "ASUS UX431FL", ALC294_FIXUP_ASUS_INTSPK_GPIO),
+	SND_PCI_QUIRK(0x1043, 0x17d1, "ASUS UX431FL", ALC294_FIXUP_ASUS_DUAL_SPEAKERS),
 	SND_PCI_QUIRK(0x1043, 0x18b1, "Asus MJ401TA", ALC256_FIXUP_ASUS_HEADSET_MIC),
 	SND_PCI_QUIRK(0x1043, 0x1a13, "Asus G73Jw", ALC269_FIXUP_ASUS_G73JW),
 	SND_PCI_QUIRK(0x1043, 0x1a30, "ASUS X705UD", ALC256_FIXUP_ASUS_MIC),
-- 
2.20.1