From: Stefan Binding sbinding@opensource.cirrus.com

[ Upstream commit d64cbb5ed9227566c068ac9300a85912234d10aa ]

Laptops use 2 CS35L41 Amps with HDA, using External boost with I2C. Similar to previous Acer laptops, these laptops also need the ALC255_FIXUP_PREDATOR_SUBWOOFER quirk to function properly.

Signed-off-by: Stefan Binding sbinding@opensource.cirrus.com Link: https://patch.msgid.link/20250515162848.405055-2-sbinding@opensource.cirrus.... Signed-off-by: Takashi Iwai tiwai@suse.de Signed-off-by: Sasha Levin sashal@kernel.org ---

**YES** This commit should be backported to stable kernel trees. ## Analysis ### What the commit does: This commit adds audio support for Acer Helios laptops using CS35L41 HDA amplifiers. The specific changes are: 1. **Adds new enum**: `ALC287_FIXUP_PREDATOR_SPK_CS35L41_I2C_2` 2. **Adds new fixup entry**: Chains `cs35l41_fixup_i2c_two` with the existing `ALC255_FIXUP_PREDATOR_SUBWOOFER` quirk 3. **Adds 3 PCI quirk entries** for specific Acer models: - `0x1025, 0x1826, "Acer Helios ZPC"` - `0x1025, 0x182c, "Acer Helios ZPD"` - `0x1025, 0x1844, "Acer Helios ZPS"` ### Comparison with approved similar commits: This commit follows **exactly the same pattern** as the four similar commits marked "YES": - **Similar Commits #1-4**: All added PCI quirk entries for ASUS laptops using CS35L41 HDA, with identical structure - **Same approach**: Extending the quirk table to map new hardware IDs to existing, proven fixup mechanisms - **Same scope**: Hardware-specific audio support using well-established CS35L41 amplifier functionality ### Hardware support vs bug fixing: This is **new hardware support** that enables audio functionality on specific Acer Helios laptop models. The CS35L41 amplifier support and ALC255_FIXUP_PREDATOR_SUBWOOFER quirk already exist - this simply extends support to new hardware variants. ### Risk assessment: **Very low risk** because: 1. **Isolated impact**: Only affects the three specific Acer Helios models listed (PCI IDs 0x1826, 0x182c, 0x1844) 2. **No architectural changes**: Pure quirk table additions with no modifications to core audio logic 3. **Proven fixup chain**: Both `cs35l41_fixup_i2c_two` and `ALC255_FIXUP_PREDATOR_SUBWOOFER` are existing, stable fixups 4. **No regression risk**: Doesn't modify behavior for any existing hardware ### Stable kernel criteria alignment: ✅ **Fixes important bugs**: Enables audio functionality that would otherwise be broken on these laptops ✅ **No new features**: Uses existing CS35L41 and Predator subwoofer infrastructure ✅ **No architectural changes**: Only extends PCI quirk tables ✅ **Minimal regression risk**: Changes are completely isolated to specific hardware IDs ✅ **Subsystem-confined**: Limited to ALSA HDA realtek driver quirks This commit perfectly matches the established pattern of stable-worthy ALSA HDA hardware support commits and should be backported to ensure audio functionality works properly for users with these Acer Helios laptops.

sound/pci/hda/patch_realtek.c | 10 ++++++++++ 1 file changed, 10 insertions(+)

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c index 20ab1fb2195ff..cd0d7ba7320ef 100644 --- a/sound/pci/hda/patch_realtek.c +++ b/sound/pci/hda/patch_realtek.c @@ -8029,6 +8029,7 @@ enum { ALC283_FIXUP_DELL_HP_RESUME, ALC294_FIXUP_ASUS_CS35L41_SPI_2, ALC274_FIXUP_HP_AIO_BIND_DACS, + ALC287_FIXUP_PREDATOR_SPK_CS35L41_I2C_2, };

/* A special fixup for Lenovo C940 and Yoga Duet 7; @@ -9301,6 +9302,12 @@ static const struct hda_fixup alc269_fixups[] = { { } } }, + [ALC287_FIXUP_PREDATOR_SPK_CS35L41_I2C_2] = { + .type = HDA_FIXUP_FUNC, + .v.func = cs35l41_fixup_i2c_two, + .chained = true, + .chain_id = ALC255_FIXUP_PREDATOR_SUBWOOFER + }, [ALC256_FIXUP_MEDION_HEADSET_NO_PRESENCE] = { .type = HDA_FIXUP_PINS, .v.pins = (const struct hda_pintbl[]) { @@ -10456,6 +10463,9 @@ static const struct hda_quirk alc269_fixup_tbl[] = { SND_PCI_QUIRK(0x1025, 0x1534, "Acer Predator PH315-54", ALC255_FIXUP_ACER_MIC_NO_PRESENCE), SND_PCI_QUIRK(0x1025, 0x159c, "Acer Nitro 5 AN515-58", ALC2XX_FIXUP_HEADSET_MIC), SND_PCI_QUIRK(0x1025, 0x169a, "Acer Swift SFG16", ALC256_FIXUP_ACER_SFG16_MICMUTE_LED), + SND_PCI_QUIRK(0x1025, 0x1826, "Acer Helios ZPC", ALC287_FIXUP_PREDATOR_SPK_CS35L41_I2C_2), + SND_PCI_QUIRK(0x1025, 0x182c, "Acer Helios ZPD", ALC287_FIXUP_PREDATOR_SPK_CS35L41_I2C_2), + SND_PCI_QUIRK(0x1025, 0x1844, "Acer Helios ZPS", ALC287_FIXUP_PREDATOR_SPK_CS35L41_I2C_2), SND_PCI_QUIRK(0x1028, 0x0470, "Dell M101z", ALC269_FIXUP_DELL_M101Z), SND_PCI_QUIRK(0x1028, 0x053c, "Dell Latitude E5430", ALC292_FIXUP_DELL_E7X), SND_PCI_QUIRK(0x1028, 0x054b, "Dell XPS one 2710", ALC275_FIXUP_DELL_XPS),