On Thu, 30 Apr 2020 10:32:53 +0200,
Kai-Heng Feng wrote:
>
> 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: Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx>
I guess this requires the Kconfig change to select CONFIG_LEDS_*
or make the code conditionally built. So far the latter strategy is
taken for the code in hda_generic.c.
thanks,
Takashi
> ---
> sound/pci/hda/patch_realtek.c | 25 +++++++++++++++++++++++++
> 1 file changed, 25 insertions(+)
>
> diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
> index 6f164ccddde3..82eb7624bbba 100644
> --- a/sound/pci/hda/patch_realtek.c
> +++ b/sound/pci/hda/patch_realtek.c
> @@ -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 +4104,24 @@ static void alc_gpio_micmute_update(struct hda_codec *codec)
> spec->gen.micmute_led.led_value);
> }
>
> +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",
> +};
> +
> /* 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 +4129,7 @@ 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 +4142,11 @@ 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);
> +
> + 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");
> }
> }
>
> --
> 2.17.1
>
