Hi Takashi,
Thank you for the patch set.
On 11/26/2018 06:11 PM, Takashi Iwai wrote:
> This patch adds a new LED trigger for coupling the audio mixer change
> with the LED on laptops or other devices. Currently there are two
> trigger types, "audio-mute" and "audio-micmute".
>
> The audio driver triggers the LED brightness change via
> ledtrig_audio_set() call with the proper type (either mute or
> mic-mute). OTOH, the consumers may call ledtrig_audio_get() for the
> initial brightness value that may have been set by the audio driver
> beforehand.
>
> This new stuff will be used by HD-audio codec driver and some platform
> drivers (thinkpad_acpi and dell-laptop, also upcoming huawei-wmi).
>
> Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
> ---
> drivers/leds/trigger/Kconfig | 7 +++++
> drivers/leds/trigger/Makefile | 1 +
> drivers/leds/trigger/ledtrig-audio.c | 45 ++++++++++++++++++++++++++++
> include/linux/leds.h | 20 +++++++++++++
> 4 files changed, 73 insertions(+)
> create mode 100644 drivers/leds/trigger/ledtrig-audio.c
>
> diff --git a/drivers/leds/trigger/Kconfig b/drivers/leds/trigger/Kconfig
> index b76fc3cdc8f8..23cc85e2e0e5 100644
> --- a/drivers/leds/trigger/Kconfig
> +++ b/drivers/leds/trigger/Kconfig
> @@ -136,4 +136,11 @@ config LEDS_TRIGGER_PATTERN
> which is a series of tuples, of brightness and duration (ms).
> If unsure, say N
>
> +config LEDS_TRIGGER_AUDIO
> + tristate "Audio Mute LED Trigger"
> + help
> + This allows LEDs to be controlled by audio drivers for following
> + the audio mute and mic-mute changes.
> + If unsure, say N
> +
> endif # LEDS_TRIGGERS
> diff --git a/drivers/leds/trigger/Makefile b/drivers/leds/trigger/Makefile
> index 9bcb64ee8123..733a83e2a718 100644
> --- a/drivers/leds/trigger/Makefile
> +++ b/drivers/leds/trigger/Makefile
> @@ -14,3 +14,4 @@ obj-$(CONFIG_LEDS_TRIGGER_CAMERA) += ledtrig-camera.o
> obj-$(CONFIG_LEDS_TRIGGER_PANIC) += ledtrig-panic.o
> obj-$(CONFIG_LEDS_TRIGGER_NETDEV) += ledtrig-netdev.o
> obj-$(CONFIG_LEDS_TRIGGER_PATTERN) += ledtrig-pattern.o
> +obj-$(CONFIG_LEDS_TRIGGER_AUDIO) += ledtrig-audio.o
> diff --git a/drivers/leds/trigger/ledtrig-audio.c b/drivers/leds/trigger/ledtrig-audio.c
> new file mode 100644
> index 000000000000..cf2b6837f570
> --- /dev/null
> +++ b/drivers/leds/trigger/ledtrig-audio.c
> @@ -0,0 +1,45 @@
> +// SPDX-License-Identifier: GPL-2.0
> +//
> +// Audio Mute LED trigger
> +//
> +
> +#include <linux/module.h>
> +#include <linux/kernel.h>
> +#include <linux/init.h>
> +#include <linux/leds.h>
> +
> +static struct led_trigger *ledtrig_audio[NUM_AUDIO_LEDS];
> +static enum led_brightness audio_state[NUM_AUDIO_LEDS];
> +
> +enum led_brightness ledtrig_audio_get(enum led_audio type)
> +{
> + return audio_state[type];
> +}
> +EXPORT_SYMBOL_GPL(ledtrig_audio_get);
> +
> +void ledtrig_audio_set(enum led_audio type, enum led_brightness state)
> +{
> + audio_state[type] = state;
> + led_trigger_event(ledtrig_audio[type], state);
> +}
> +EXPORT_SYMBOL_GPL(ledtrig_audio_set);
> +
> +static int __init ledtrig_audio_init(void)
> +{
> + led_trigger_register_simple("audio-mute",
> + &ledtrig_audio[LED_AUDIO_MUTE]);
> + led_trigger_register_simple("audio-micmute",
> + &ledtrig_audio[LED_AUDIO_MICMUTE]);
> + return 0;
> +}
> +module_init(ledtrig_audio_init);
> +
> +static void __exit ledtrig_audio_exit(void)
> +{
> + led_trigger_unregister_simple(ledtrig_audio[LED_AUDIO_MUTE]);
> + led_trigger_unregister_simple(ledtrig_audio[LED_AUDIO_MICMUTE]);
> +}
> +module_exit(ledtrig_audio_exit);
> +
> +MODULE_DESCRIPTION("LED trigger for audio mute control");
> +MODULE_LICENSE("GPL v2");
> diff --git a/include/linux/leds.h b/include/linux/leds.h
> index 7393a316d9fa..580cbaef789a 100644
> --- a/include/linux/leds.h
> +++ b/include/linux/leds.h
> @@ -487,4 +487,24 @@ struct led_pattern {
> int brightness;
> };
>
> +enum led_audio {
> + LED_AUDIO_MUTE, /* master mute LED */
> + LED_AUDIO_MICMUTE, /* mic mute LED */
> + NUM_AUDIO_LEDS
> +};
> +
> +#if IS_ENABLED(CONFIG_LEDS_TRIGGER_AUDIO)
> +enum led_brightness ledtrig_audio_get(enum led_audio type);
> +void ledtrig_audio_set(enum led_audio type, enum led_brightness state);
> +#else
> +static inline enum led_brightness ledtrig_audio_get(enum led_audio type)
> +{
> + return LED_OFF;
> +}
> +static inline void ledtrig_audio_set(enum led_audio type,
> + enum led_brightness state)
> +{
> +}
> +#endif
> +
> #endif /* __LINUX_LEDS_H_INCLUDED */
>
For this patch and FWIW for the whole patch set:
Acked-by: Jacek Anaszewski <jacek.anaszewski@xxxxxxxxx>
--
Best regards,
Jacek Anaszewski
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