Commit 87dc3648 authored by Kai-Heng Feng's avatar Kai-Heng Feng Committed by Takashi Iwai
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ALSA: hda/realtek - Add LED class support for micmute LED 



Currently DMIC controls micmute LED via "audio mute LED trigger".

However, unlike Dell and Lenovo platforms, HP platforms don't provide a
way to control micmute LED via ACPI, it's controlled by HDA codec
instead.

So let's register an LED class for micmute so other subsystems like DMIC
can facilitate the codec-controlled LED.

Signed-off-by: default avatarKai-Heng Feng <kai.heng.feng@canonical.com>
Link: https://lore.kernel.org/r/20200430135209.14703-1-kai.heng.feng@canonical.com


Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 3e0650ab

sound/pci/hda/patch_realtek.c

+29 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
#include <linux/dmi.h>

#include <linux/module.h>

#include <linux/input.h>

#include <linux/leds.h>

#include <sound/core.h>

#include <sound/jack.h>

#include <sound/hda_codec.h>
@@ -4103,6 +4104,26 @@ static void alc_gpio_micmute_update(struct hda_codec *codec) 
			    spec->gen.micmute_led.led_value);

}



#if IS_REACHABLE(CONFIG_LEDS_TRIGGER_AUDIO)

static int micmute_led_set(struct led_classdev *led_cdev,

			   enum led_brightness brightness)

{

	struct hda_codec *codec = dev_to_hda_codec(led_cdev->dev->parent);

	struct alc_spec *spec = codec->spec;



	alc_update_gpio_led(codec, spec->gpio_mic_led_mask,

			    spec->micmute_led_polarity, !!brightness);

	return 0;

}



static struct led_classdev micmute_led_cdev = {

	.name = "hda::micmute",

	.max_brightness = 1,

	.brightness_set_blocking = micmute_led_set,

	.default_trigger = "audio-micmute",

};

#endif



/* setup mute and mic-mute GPIO bits, add hooks appropriately */

static void alc_fixup_hp_gpio_led(struct hda_codec *codec,

				  int action,
@@ -4110,6 +4131,7 @@ static void alc_fixup_hp_gpio_led(struct hda_codec *codec, 
				  unsigned int micmute_mask)

{

	struct alc_spec *spec = codec->spec;

	int err;



	alc_fixup_gpio(codec, action, mute_mask | micmute_mask);
@@ -4122,6 +4144,13 @@ static void alc_fixup_hp_gpio_led(struct hda_codec *codec, 
	if (micmute_mask) {

		spec->gpio_mic_led_mask = micmute_mask;

		snd_hda_gen_add_micmute_led(codec, alc_gpio_micmute_update);



#if IS_REACHABLE(CONFIG_LEDS_TRIGGER_AUDIO)

		micmute_led_cdev.brightness = ledtrig_audio_get(LED_AUDIO_MICMUTE);

		err = devm_led_classdev_register(&codec->core.dev, &micmute_led_cdev);

		if (err)

			codec_warn(codec, "failed to register micmute LED\n");

#endif

	}

}

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