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ASoC: codecs: aw88261: expose hardware mute control

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When the aw88261 speaker volume is set to 0, it becomes very quiet but
still audible. This causes echo during phone calls on motorola-dubai, as
the bottom speaker output is getting picked up by the bottom microphone.

Expose the aw88261 hardware mute functionality as a Playback Switch
control. The new control can be used in a UCM profile to disable the
bottom speaker during phone calls and greatly reduce the echo.

Signed-off-by: Federico Amedeo Izzo <federico@izzo.pro>
Link: https://patch.msgid.link/20261010-aw88261-hardware-mute-v1-1-d0befedd3b4c@izzo.pro
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Federico Amedeo Izzo 2026-10-10 12:24:43 +02:00 committed by Mark Brown
parent 80b3f283e9
commit fe9dcf5f65
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1 changed files with 29 additions and 0 deletions
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29
sound/soc/codecs/aw88261.c
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@ -1014,6 +1014,33 @@ static int aw88261_volume_set(struct snd_kcontrol *kcontrol,
return 0;
}
static int aw88261_mute_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *codec = snd_kcontrol_chip(kcontrol);
struct aw88261 *aw88261 = snd_soc_component_get_drvdata(codec);
ucontrol->value.integer.value[0] = !aw88261->mute_st;
return 0;
}
static int aw88261_mute_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *codec = snd_kcontrol_chip(kcontrol);
struct aw88261 *aw88261 = snd_soc_component_get_drvdata(codec);
bool mute = !ucontrol->value.integer.value[0];
if (aw88261->mute_st == mute)
return 0;
aw88261->mute_st = mute;
if (aw88261->aw_pa->status == AW88261_DEV_PW_ON)
aw88261_dev_mute(aw88261->aw_pa, mute);
return 1;
}
/*
* The field contains 4 bits in units of 6dB + 6 bits in units of 0.125dB
* which is too precise for TLV (!) so we have to multiply the scale by 2.
@ -1026,6 +1053,8 @@ static const struct snd_kcontrol_new aw88261_controls[] = {
SOC_SINGLE_EXT_TLV("PCM Playback Volume", AW88261_SYSCTRL2_REG,
6, AW88261_CTL_MAX_VOL, 1,
aw88261_volume_get, aw88261_volume_set, volume_tlv),
SOC_SINGLE_EXT("Playback Switch", 0, 0, 1, 0,
aw88261_mute_get, aw88261_mute_put),
AW88261_PROFILE_EXT("Profile Set", aw88261_profile_info,
aw88261_profile_get, aw88261_profile_set),
};