ALSA: control - add sysfs support to the LED trigger module

Browse source

Create SYSFS/devices/virtual/sound/ctl-led tree
(with SYSFS/class/sound/ctl-led symlink).

  speaker/
    +-- mode
    +-- brightness
  mic/
    +-- mode
    +-- brightness

Copy the idea from the HDA driver and allow to set the audio
LEDs based on the various modes:

- follow mute
- follow moute (inverted to follow mute)
- off
- on

Also, the actual LED state is exposed.

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Link: https://lore.kernel.org/r/20210317172945.842280-6-perex@perex.cz
Signed-off-by: Takashi Iwai <tiwai@suse.de>

...

This commit is contained in:

Jaroslav Kysela 2021-03-17 18:29:44 +01:00 • committed by Takashi Iwai

parent e65bf99718

commit cb17fe0045

1 changed files with 163 additions and 29 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

192

sound/core/control_led.c

View file