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ALSA: hda/realtek: fix the hp playback volume issue for LG machines

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BugLink: https://bugs.launchpad.net/bugs/2058573

Recently we tested the headphone playback on 2 LG machines, if we set
the volume to the max value or near to the max value, the sound is too
loud, it could even bring harm to listeners.

A workaround is to decrease the max volume to a reasonable value for
the headphone's amplifier, then the users couldn't set the volume
bigger than that value from the userspace.

Signed-off-by: Hui Wang <hui.wang@canonical.com>
Message-ID: <20240318011128.156023-1-hui.wang@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
(backported from commit 1e5dc3989a20ccd703d5fe1a269d2bcedf29142c linux-next)
Signed-off-by: Hui Wang <hui.wang@canonical.com>
Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>
This commit is contained in:
Hui Wang
2024-03-21 10:22:05 +08:00
committed by Roxana Nicolescu
parent cb07a08803
commit 8b754f03f4
1 changed files with 26 additions and 0 deletions
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sound/pci/hda/patch_realtek.c
+26
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@@ -7118,6 +7118,25 @@ static void alc256_fixup_mic_no_presence_and_resume(struct hda_codec *codec,
}
}
static void alc256_decrease_headphone_amp_val(struct hda_codec *codec,
const struct hda_fixup *fix, int action)
{
u32 caps;
u8 nsteps, offs;
if (action != HDA_FIXUP_ACT_PRE_PROBE)
return;
caps = query_amp_caps(codec, 0x3, HDA_OUTPUT);
nsteps = ((caps & AC_AMPCAP_NUM_STEPS) >> AC_AMPCAP_NUM_STEPS_SHIFT) - 10;
offs = ((caps & AC_AMPCAP_OFFSET) >> AC_AMPCAP_OFFSET_SHIFT) - 10;
caps &= ~AC_AMPCAP_NUM_STEPS & ~AC_AMPCAP_OFFSET;
caps |= (nsteps << AC_AMPCAP_NUM_STEPS_SHIFT) | (offs << AC_AMPCAP_OFFSET_SHIFT);
if (snd_hda_override_amp_caps(codec, 0x3, HDA_OUTPUT, caps))
codec_warn(codec, "failed to override amp caps for NID 0x3\n");
}
static void alc_fixup_dell4_mic_no_presence_quiet(struct hda_codec *codec,
const struct hda_fixup *fix,
int action)
@@ -7533,6 +7552,7 @@ enum {
ALC2XX_FIXUP_HEADSET_MIC,
ALC289_FIXUP_DELL_CS35L41_SPI_2,
ALC294_FIXUP_CS35L41_I2C_2,
ALC256_FIXUP_HEADPHONE_AMP_VOL,
};
/* A special fixup for Lenovo C940 and Yoga Duet 7;
@@ -9716,6 +9736,10 @@ static const struct hda_fixup alc269_fixups[] = {
.type = HDA_FIXUP_FUNC,
.v.func = cs35l41_fixup_i2c_two,
},
[ALC256_FIXUP_HEADPHONE_AMP_VOL] = {
.type = HDA_FIXUP_FUNC,
.v.func = alc256_decrease_headphone_amp_val,
},
};
static const struct snd_pci_quirk alc269_fixup_tbl[] = {
@@ -10409,6 +10433,8 @@ static const struct snd_pci_quirk alc269_fixup_tbl[] = {
SND_PCI_QUIRK(0x17aa, 0x9e56, "Lenovo ZhaoYang CF4620Z", ALC286_FIXUP_SONY_MIC_NO_PRESENCE),
SND_PCI_QUIRK(0x1849, 0x1233, "ASRock NUC Box 1100", ALC233_FIXUP_NO_AUDIO_JACK),
SND_PCI_QUIRK(0x1849, 0xa233, "Positivo Master C6300", ALC269_FIXUP_HEADSET_MIC),
SND_PCI_QUIRK(0x1854, 0x0440, "LG CQ6", ALC256_FIXUP_HEADPHONE_AMP_VOL),
SND_PCI_QUIRK(0x1854, 0x0441, "LG CQ6 AIO", ALC256_FIXUP_HEADPHONE_AMP_VOL),
SND_PCI_QUIRK(0x19e5, 0x3204, "Huawei MACH-WX9", ALC256_FIXUP_HUAWEI_MACH_WX9_PINS),
SND_PCI_QUIRK(0x19e5, 0x320f, "Huawei WRT-WX9 ", ALC256_FIXUP_ASUS_MIC_NO_PRESENCE),
SND_PCI_QUIRK(0x1b35, 0x1235, "CZC B20", ALC269_FIXUP_CZC_B20),