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authorJaroslav Kysela <perex@perex.cz>2021-03-17 18:29:42 +0100
committerTakashi Iwai <tiwai@suse.de>2021-03-30 15:33:58 +0200
commit22d8de62f11b287b279f1d4473a78c7d5e53e7bc (patch)
treec70cf12a37bf874e36b727dbefece077b34febe5 /sound/core/Kconfig
parent3f0638a0333bfdd0549985aa620f2ab69737af47 (diff)
ALSA: control - add generic LED trigger module as the new control layer
The recent laptops have usually two LEDs assigned to reflect the speaker and microphone mute state. This implementation adds a tiny layer on top of the control API which calculates the state for those LEDs using the driver callbacks. Two new access flags are introduced to describe the controls which affects the audio path settings (an easy code change for drivers). The LED resource can be shared with multiple sound cards with this code. The user space controls may be added to the state chain on demand, too. This code should replace the LED code in the HDA driver and add a possibility to easy extend the other drivers (ASoC codecs etc.). Signed-off-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20210317172945.842280-4-perex@perex.cz Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core/Kconfig')
-rw-r--r--sound/core/Kconfig6
1 files changed, 6 insertions, 0 deletions
diff --git a/sound/core/Kconfig b/sound/core/Kconfig
index a4050f87f230..db2e3c63ff41 100644
--- a/sound/core/Kconfig
+++ b/sound/core/Kconfig
@@ -203,4 +203,10 @@ config SND_DMA_SGBUF
def_bool y
depends on X86
+config SND_CTL_LED
+ tristate
+ select NEW_LEDS if SND_CTL_LED
+ select LEDS_TRIGGERS if SND_CTL_LED
+ select LEDS_TRIGGER_AUDIO if SND_CTL_LED
+
source "sound/core/seq/Kconfig"