ALSA: hda: cs35l41: Add read-only ALSA control for forced mute

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When the CS35L41 amp is requested to mute using the ACPI
notification mechanism, userspace is not notified that the amp
is muted. To allow userspace to know about the mute, add an
ALSA control which tracks the forced mute override.
This control does not track the overall mute state of the amp,
since the amp is only unmuted during playback anyway, instead
it tracks the mute override request from the ACPI notification.

Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230921162849.1988124-5-sbinding@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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Stefan Binding 2023-09-21 17:28:49 +01:00 • committed by Takashi Iwai

parent 447106e92a

commit 4c870513fb

1 changed files with 28 additions and 0 deletions

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sound/pci/hda/cs35l41_hda.c

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