[PATCH v2] ALSA: hda/realtek: Rename Line Out control to Headphone on ThinkPad X1 Carbon 6th

[Zhang Heng]

The ThinkPad X1 Carbon 6th Gen (ALC285, SSID 17aa:225c) has no physical
Line Out jack. The 3.5mm headphone jack is wired to the headphone DAC,
but the ALSA HDA driver names the corresponding control as
"Line Out Playback Volume" (node 0x02).

PipeWire's ALSA Card Profile (ACP) silences "Line Out" when headphones
are activated, which incorrectly mutes the headphone output.

Add a quirk to rename the control to "Headphone Playback Volume" via
alc285_lenovo_dac_rename().

Tested on openSUSE Tumbleweed (kernel 7.1.5):
- Control renamed successfully, no name collision with "Headphone Playback Switch"
- Headphone output works across multiple PipeWire/WirePlumber restarts
  and port switches

Closes: https://bugzilla.kernel.org/show_bug.cgi?id=221522
Signed-off-by: Zhang Heng <zhangheng@xxxxxxxxxx>
Tested-by: Branislav Klocok <branislav.klocok@xxxxxxxx>
---
 sound/hda/codecs/realtek/alc269.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/sound/hda/codecs/realtek/alc269.c b/sound/hda/codecs/realtek/alc269.c
index 6b36c730ce78..48d887d1324f 100644
--- a/sound/hda/codecs/realtek/alc269.c
+++ b/sound/hda/codecs/realtek/alc269.c
@@ -2572,6 +2572,13 @@ static void alc282_fixup_asus_tx300(struct hda_codec *codec,
 	}
 }
 
+static void alc285_lenovo_dac_rename(struct hda_codec *codec,
+				     const struct hda_fixup *fix, int action)
+{
+	if (action == HDA_FIXUP_ACT_BUILD)
+		rename_ctl(codec, "Line Out Playback Volume",
+			   "Headphone Playback Volume");
+}
 static void alc290_fixup_mono_speakers(struct hda_codec *codec,
 				       const struct hda_fixup *fix, int action)
 {
@@ -4289,6 +4296,7 @@ enum {
 	ALC287_FIXUP_AW88399_I2C_2,
 	ALC287_FIXUP_LENOVO_LEGION_AW88399,
 	ALC287_FIXUP_YOGA9_14IAP7_BASS_SPK_PIN_HEADSET,
+	ALC285_LENOVO_DAC_RENAME,
 };
 
 /* A special fixup for Lenovo C940 and Yoga Duet 7;
@@ -6998,6 +7006,10 @@ static const struct hda_fixup alc269_fixups[] = {
 		.chained = true,
 		.chain_id = ALC287_FIXUP_YOGA9_14IAP7_BASS_SPK_PIN,
 	},
+	[ALC285_LENOVO_DAC_RENAME] = {
+		.type = HDA_FIXUP_FUNC,
+		.v.func = alc285_lenovo_dac_rename,
+	},
 };
 
 static const struct hda_quirk alc269_fixup_tbl[] = {
@@ -7956,6 +7968,7 @@ static const struct hda_quirk alc269_fixup_tbl[] = {
 	SND_PCI_QUIRK(0x17aa, 0x224b, "Thinkpad", ALC298_FIXUP_TPT470_DOCK),
 	SND_PCI_QUIRK(0x17aa, 0x224c, "Thinkpad", ALC298_FIXUP_TPT470_DOCK),
 	SND_PCI_QUIRK(0x17aa, 0x224d, "Thinkpad", ALC298_FIXUP_TPT470_DOCK),
+	SND_PCI_QUIRK(0x17aa, 0x225c, "Lenovo ThinkPad X1 Carbon 6th Gen", ALC285_LENOVO_DAC_RENAME),
 	SND_PCI_QUIRK(0x17aa, 0x225d, "Thinkpad T480", ALC269_FIXUP_THINKPAD_LIMIT_INT_MIC_BOOST),
 	SND_PCI_QUIRK(0x17aa, 0x2288, "Thinkpad X390", ALC285_FIXUP_THINKPAD_NO_BASS_SPK_HEADSET_JACK),
 	SND_PCI_QUIRK(0x17aa, 0x2292, "Thinkpad X1 Carbon 7th", ALC285_FIXUP_THINKPAD_HEADSET_JACK),
-- 
2.25.1