linux-kernel - Re: [PATCH v2] platform/x86: asus-wmi: support the disable camera LED on F10 of Zenbook 2023

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Message-Id: <ab40d5d2-a14a-4cb2-b315-b4cb66654f9e@app.fastmail.com>
Date: Fri, 21 Jun 2024 21:27:32 +1200
From: "Luke Jones" <luke@...nes.dev>
To: "Devin Bayer" <dev@...bly.so>, corentin.chary@...il.com
Cc: "Hans de Goede" <hdegoede@...hat.com>,
 platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-api@...r.kernel.org,
 Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Subject: Re: [PATCH v2] platform/x86: asus-wmi: support the disable camera LED on F10
 of Zenbook 2023

On Fri, 21 Jun 2024, at 8:57 PM, Devin Bayer wrote:
> Adds a sysfs entry for the LED on F10 above the crossed out camera icon on 2023 Zenbooks.
> 
> v2
> - Changed name from `platform::camera` to `asus::camera`
> - Separated patch from patchset
> 
> v1
> - https://lore.kernel.org/platform-driver-x86/20240620082223.20178-1-dev@doubly.so/
> 
> Signed-off-by: Devin Bayer <dev@...bly.so>
> ---
> drivers/platform/x86/asus-wmi.c            | 36 ++++++++++++++++++++++
> include/linux/platform_data/x86/asus-wmi.h |  2 ++
> 2 files changed, 38 insertions(+)
> 
> diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
> index 3f07bbf809ef..20b7ed6a27b5 100644
> --- a/drivers/platform/x86/asus-wmi.c
> +++ b/drivers/platform/x86/asus-wmi.c
> @@ -73,6 +73,7 @@ module_param(fnlock_default, bool, 0444);
> #define NOTIFY_LID_FLIP_ROG 0xbd
>  
> #define ASUS_WMI_FNLOCK_BIOS_DISABLED BIT(0)
> +#define ASUS_WMI_DEVID_CAMERA_LED 0x00060079
>  
> #define ASUS_MID_FAN_DESC "mid_fan"
> #define ASUS_GPU_FAN_DESC "gpu_fan"
> @@ -227,6 +228,7 @@ struct asus_wmi {
> struct led_classdev lightbar_led;
> int lightbar_led_wk;
> struct led_classdev micmute_led;
> + struct led_classdev camera_led;
> struct workqueue_struct *led_workqueue;
> struct work_struct tpd_led_work;
> struct work_struct wlan_led_work;
> @@ -1533,6 +1535,27 @@ static int micmute_led_set(struct led_classdev *led_cdev,
> return err < 0 ? err : 0;
> }
>  
> +static enum led_brightness camera_led_get(struct led_classdev *led_cdev)
> +{
> + struct asus_wmi *asus;
> + u32 result;
> +
> + asus = container_of(led_cdev, struct asus_wmi, camera_led);
> + asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_CAMERA_LED, &result);
> +
> + return result & ASUS_WMI_DSTS_BRIGHTNESS_MASK;
> +}
> +
> +static int camera_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_CAMERA_LED, state, NULL);
> + return err < 0 ? err : 0;
> +}
> +
> static void asus_wmi_led_exit(struct asus_wmi *asus)
> {
> led_classdev_unregister(&asus->kbd_led);
> @@ -1540,6 +1563,7 @@ static void asus_wmi_led_exit(struct asus_wmi *asus)
> led_classdev_unregister(&asus->wlan_led);
> led_classdev_unregister(&asus->lightbar_led);
> led_classdev_unregister(&asus->micmute_led);
> + led_classdev_unregister(&asus->camera_led);
>  
> if (asus->led_workqueue)
> destroy_workqueue(asus->led_workqueue);
> @@ -1631,6 +1655,18 @@ static int asus_wmi_led_init(struct asus_wmi *asus)
> goto error;
> }
>  
> + if (asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_CAMERA_LED)) {
> + asus->camera_led.name = "asus::camera";
> + asus->camera_led.max_brightness = 1;
> + asus->camera_led.brightness_get = camera_led_get;
> + asus->camera_led.brightness_set_blocking = camera_led_set;
> +
> + rv = led_classdev_register(&asus->platform_device->dev,
> + &asus->camera_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 ab1c7deff118..fb0b00f7d292 100644
> --- a/include/linux/platform_data/x86/asus-wmi.h
> +++ b/include/linux/platform_data/x86/asus-wmi.h
> @@ -50,6 +50,8 @@
> #define ASUS_WMI_DEVID_LED5 0x00020015
> #define ASUS_WMI_DEVID_LED6 0x00020016
> #define ASUS_WMI_DEVID_MICMUTE_LED 0x00040017
> +#define ASUS_WMI_DEVID_CAMERA_LED_NEG 0x00060078
> +#define ASUS_WMI_DEVID_CAMERA_LED 0x00060079
>  
> /* Backlight and Brightness */
> #define ASUS_WMI_DEVID_ALS_ENABLE 0x00050001 /* Ambient Light Sensor */
> -- 
> 2.45.2
> 

If Hans and Ilpo have no other comments regarding the written C code:

Signed-off-by: Luke D. Jones <luke@...nes.dev>