linux-kernel - Re: [PATCH v3 1/1] platform/x86: asus-wmi: Add mic-mute LED classdev support

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Date:   Thu, 14 Jul 2022 22:04:11 +0200
From:   Hans de Goede <hdegoede@...hat.com>
To:     PaddyKP_Yao <ispaddy@...il.com>
Cc:     PaddyKP_Yao@...s.com, acpi4asus-user@...ts.sourceforge.net,
        andy.shevchenko@...il.com, corentin.chary@...il.com,
        linux-kernel@...r.kernel.org, luke@...nes.dev,
        mgross@...ux.intel.com, platform-driver-x86@...r.kernel.org
Subject: Re: [PATCH v3 1/1] platform/x86: asus-wmi: Add mic-mute LED classdev
 support

Hi,

On 7/11/22 13:51, PaddyKP_Yao wrote:
> In some new ASUS devices, hotkey Fn+F13 is used for mic mute. If mic-mute
> LED is present by checking WMI ASUS_WMI_DEVID_MICMUTE_LED, we will add a
> mic-mute LED classdev, asus::micmute, in the asus-wmi driver to control
> it. The binding of mic-mute LED controls will be swithched with LED
> trigger.
> 
> Signed-off-by: PaddyKP_Yao <PaddyKP_Yao@...s.com>
> ---
> V1 -> V2: fix typo for 'present' and remove unnecessary pr_info() log
> V2 -> V3: resend patch again by gmail to avoid Asus legal in the mail

Thank you for your patch, I've applied this patch to my review-hans 
branch:
https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=review-hans

Once I've run some tests on this branch the patches there will be
added to the platform-drivers-x86/for-next branch and eventually
will be included in the pdx86 pull-request to Linus for the next
merge-window.

Regards,

Hans


> 
>  drivers/platform/x86/Kconfig               |  2 ++
>  drivers/platform/x86/asus-wmi.c            | 25 ++++++++++++++++++++++
>  include/linux/platform_data/x86/asus-wmi.h |  1 +
>  3 files changed, 28 insertions(+)
> 
> diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
> index f915cf67aa26..74769050b770 100644
> --- a/drivers/platform/x86/Kconfig
> +++ b/drivers/platform/x86/Kconfig
> @@ -274,6 +274,8 @@ config ASUS_WMI
>  	select INPUT_SPARSEKMAP
>  	select LEDS_CLASS
>  	select NEW_LEDS
> +	select LEDS_TRIGGERS
> +	select LEDS_TRIGGER_AUDIO
>  	select ACPI_PLATFORM_PROFILE
>  	help
>  	  Say Y here if you have a WMI aware Asus laptop (like Eee PCs or new
> diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
> index e14fb5fa7324..40c0e00a4b71 100644
> --- a/drivers/platform/x86/asus-wmi.c
> +++ b/drivers/platform/x86/asus-wmi.c
> @@ -191,6 +191,7 @@ struct asus_wmi {
>  	int kbd_led_wk;
>  	struct led_classdev lightbar_led;
>  	int lightbar_led_wk;
> +	struct led_classdev micmute_led;
>  	struct workqueue_struct *led_workqueue;
>  	struct work_struct tpd_led_work;
>  	struct work_struct wlan_led_work;
> @@ -906,12 +907,23 @@ static enum led_brightness lightbar_led_get(struct led_classdev *led_cdev)
>  	return result & ASUS_WMI_DSTS_LIGHTBAR_MASK;
>  }
>  
> +static int micmute_led_set(struct led_classdev *led_cdev,
> +			   enum led_brightness brightness)
> +{
> +	int state = brightness != LED_OFF;
> +	int err;
> +
> +	err = asus_wmi_set_devstate(ASUS_WMI_DEVID_MICMUTE_LED, state, NULL);
> +	return err < 0 ? err : 0;
> +}
> +
>  static void asus_wmi_led_exit(struct asus_wmi *asus)
>  {
>  	led_classdev_unregister(&asus->kbd_led);
>  	led_classdev_unregister(&asus->tpd_led);
>  	led_classdev_unregister(&asus->wlan_led);
>  	led_classdev_unregister(&asus->lightbar_led);
> +	led_classdev_unregister(&asus->micmute_led);
>  
>  	if (asus->led_workqueue)
>  		destroy_workqueue(asus->led_workqueue);
> @@ -983,6 +995,19 @@ static int asus_wmi_led_init(struct asus_wmi *asus)
>  					   &asus->lightbar_led);
>  	}
>  
> +	if (asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_MICMUTE_LED)) {
> +		asus->micmute_led.name = "asus::micmute";
> +		asus->micmute_led.max_brightness = 1;
> +		asus->micmute_led.brightness = ledtrig_audio_get(LED_AUDIO_MICMUTE);
> +		asus->micmute_led.brightness_set_blocking = micmute_led_set;
> +		asus->micmute_led.default_trigger = "audio-micmute";
> +
> +		rv = led_classdev_register(&asus->platform_device->dev,
> +						&asus->micmute_led);
> +		if (rv)
> +			goto error;
> +	}
> +
>  error:
>  	if (rv)
>  		asus_wmi_led_exit(asus);
> diff --git a/include/linux/platform_data/x86/asus-wmi.h b/include/linux/platform_data/x86/asus-wmi.h
> index 17dc5cb6f3f2..38ee75874d11 100644
> --- a/include/linux/platform_data/x86/asus-wmi.h
> +++ b/include/linux/platform_data/x86/asus-wmi.h
> @@ -49,6 +49,7 @@
>  #define ASUS_WMI_DEVID_LED4		0x00020014
>  #define ASUS_WMI_DEVID_LED5		0x00020015
>  #define ASUS_WMI_DEVID_LED6		0x00020016
> +#define ASUS_WMI_DEVID_MICMUTE_LED		0x00040017
>  
>  /* Backlight and Brightness */
>  #define ASUS_WMI_DEVID_ALS_ENABLE	0x00050001 /* Ambient Light Sensor */