[PATCH] ALSA: hda/realtek: Enable all four speaker amps on Lenovo ThinkBook X G2 IAH

[PATCH] ALSA: hda/realtek: Enable all four speaker amps on Lenovo ThinkBook X G2 IAH

[Evgeny Akhtimirov via B4 Relay]

From: Evgeny Akhtimirov <evgeny@devduty.com>

The Lenovo ThinkBook X G2 IAH (MTM 21TU) has an ALC287 codec with four
CS35L41 amplifiers on I2C (CSC3551). It reports codec SSID 17aa:3929,
which it shares with the ThinkBook 13x Gen 5, and PCI SSID 17aa:3842.

Since PCI SSID 17aa:3842 has no quirk entry, the codec SSID matches
ALC287_FIXUP_MG_RTKC_CSAMP_CS35L41_I2C_THINKPAD. That fixup binds only
two amps (cs35l41-hda.0 and .1), while the CS35L41 configuration table
describes four for 17AA3929. Amps .2 and .3 probe and load firmware,
but they are never bound to the codec, so half of the speakers stay
silent.

Add a ThinkPad-style fixup chain that binds four I2C amps, and match the
laptop by its PCI SSID so the ThinkBook 13x Gen 5 is not affected.

Tested with hda_model=1028:0c4d (alias to ALC287_FIXUP_CS35L41_I2C_4):
all four amps bind, apply their calibration and are runtime-active
during playback.

Cc: stable@vger.kernel.org
Signed-off-by: Evgeny Akhtimirov <evgeny@devduty.com>
---
 sound/hda/codecs/realtek/alc269.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/sound/hda/codecs/realtek/alc269.c b/sound/hda/codecs/realtek/alc269.c
index a68b6a9b7..217df4301 100644
--- a/sound/hda/codecs/realtek/alc269.c
+++ b/sound/hda/codecs/realtek/alc269.c
@@ -4427,6 +4427,8 @@ enum {
 	ALC245_FIXUP_HP_X360_MUTE_LEDS,
 	ALC287_FIXUP_THINKPAD_I2S_SPK,
 	ALC287_FIXUP_MG_RTKC_CSAMP_CS35L41_I2C_THINKPAD,
+	ALC287_FIXUP_CS35L41_I2C_4_THINKPAD_ACPI,
+	ALC287_FIXUP_MG_RTKC_CSAMP_CS35L41_I2C_4_THINKPAD,
 	ALC2XX_FIXUP_HEADSET_MIC,
 	ALC289_FIXUP_DELL_CS35L41_SPI_2,
 	ALC256_FIXUP_ACER_SFG16_MICMUTE_LED,
@@ -7017,6 +7019,18 @@ static const struct hda_fixup alc269_fixups[] = {
 		.chained = true,
 		.chain_id = ALC287_FIXUP_CS35L41_I2C_2_THINKPAD_ACPI,
 	},
+	[ALC287_FIXUP_CS35L41_I2C_4_THINKPAD_ACPI] = {
+		.type = HDA_FIXUP_FUNC,
+		.v.func = cs35l41_fixup_i2c_four,
+		.chained = true,
+		.chain_id = ALC285_FIXUP_THINKPAD_NO_BASS_SPK_HEADSET_JACK,
+	},
+	[ALC287_FIXUP_MG_RTKC_CSAMP_CS35L41_I2C_4_THINKPAD] = {
+		.type = HDA_FIXUP_FUNC,
+		.v.func = alc287_fixup_tb_vmaster_led,
+		.chained = true,
+		.chain_id = ALC287_FIXUP_CS35L41_I2C_4_THINKPAD_ACPI,
+	},
 	[ALC2XX_FIXUP_HEADSET_MIC] = {
 		.type = HDA_FIXUP_FUNC,
 		.v.func = alc2xx_fixup_headset_mic,
@@ -8378,6 +8392,7 @@ static const struct hda_quirk alc269_fixup_tbl[] = {
 	SND_PCI_QUIRK(0x17aa, 0x3827, "Ideapad S740", ALC285_FIXUP_IDEAPAD_S740_COEF),
 	SND_PCI_QUIRK(0x17aa, 0x3834, "Lenovo IdeaPad Slim 9i 14ITL5", ALC287_FIXUP_YOGA7_14ITL_SPEAKERS),
 	SND_PCI_QUIRK(0x17aa, 0x383d, "Legion Y9000X 2019", ALC285_FIXUP_LEGION_Y9000X_SPEAKERS),
+	SND_PCI_QUIRK(0x17aa, 0x3842, "ThinkBook X G2 IAH", ALC287_FIXUP_MG_RTKC_CSAMP_CS35L41_I2C_4_THINKPAD),
 	SND_PCI_QUIRK(0x17aa, 0x3843, "Lenovo Yoga 9i / Yoga Book 9i", ALC287_FIXUP_LENOVO_YOGA_BOOK_9I),
 	/* Yoga Pro 7 14IMH9 shares PCI SSID 17aa:3847 with Legion 7 16ACHG6;
 	 * use codec SSID to distinguish them

---
base-commit: f5e1a9a3fddab8421416b68bb132ae9626d07156
change-id: 20261009-thinkbook-x-g2-iah-05195dea7d38

Best regards,
-- 
Evgeny Akhtimirov <evgeny@devduty.com>

Re: [PATCH] ALSA: hda/realtek: Enable all four speaker amps on Lenovo ThinkBook X G2 IAH

[Takashi Iwai]

On Fri, 09 Oct 2026 18:02:37 +0200,
Evgeny Akhtimirov via B4 Relay wrote:
> 
> From: Evgeny Akhtimirov <evgeny@devduty.com>
> 
> The Lenovo ThinkBook X G2 IAH (MTM 21TU) has an ALC287 codec with four
> CS35L41 amplifiers on I2C (CSC3551). It reports codec SSID 17aa:3929,
> which it shares with the ThinkBook 13x Gen 5, and PCI SSID 17aa:3842.
> 
> Since PCI SSID 17aa:3842 has no quirk entry, the codec SSID matches
> ALC287_FIXUP_MG_RTKC_CSAMP_CS35L41_I2C_THINKPAD. That fixup binds only
> two amps (cs35l41-hda.0 and .1), while the CS35L41 configuration table
> describes four for 17AA3929. Amps .2 and .3 probe and load firmware,
> but they are never bound to the codec, so half of the speakers stay
> silent.
> 
> Add a ThinkPad-style fixup chain that binds four I2C amps, and match the
> laptop by its PCI SSID so the ThinkBook 13x Gen 5 is not affected.
> 
> Tested with hda_model=1028:0c4d (alias to ALC287_FIXUP_CS35L41_I2C_4):
> all four amps bind, apply their calibration and are runtime-active
> during playback.
> 
> Cc: stable@vger.kernel.org
> Signed-off-by: Evgeny Akhtimirov <evgeny@devduty.com>

Thanks, applied now.


Takashi