linux-kernel - Re: [PATCH v3 1/6] asus-wmi: Implement TUF laptop keyboard RGB control

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Date:   Tue, 9 Aug 2022 12:50:31 +0200
From:   Pavel Machek <pavel@....cz>
To:     "Luke D. Jones" <luke@...nes.dev>
Cc:     hdegoede@...hat.com, andy.shevchenko@...il.com,
        pobrn@...tonmail.com, platform-driver-x86@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/6] asus-wmi: Implement TUF laptop keyboard RGB
 control

Hi!

> Adds support for TUF laptop RGB control via the multicolor LED API.
> 
> As this is the bas for adjusting only the RGB values, it sets the
> default mode of the keyboard to static since there is no way to read
> any existing settings from the device. These defaults overwrite the
> booted state of the keyboard when the module is loaded.

> +	if (asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_TUF_RGB_MODE)) {
> +		struct mc_subled *mc_led_info = asus->keyboard_rgb_mode.subled_info;
> +		struct led_classdev_mc *mc_cdev = &asus->keyboard_rgb_mode.dev;
> +		struct device *dev = &asus->platform_device->dev;
> +		u8 led_brightness = 255;
> +
> +		/*
> +		 * asus::kbd_backlight still controls a base 3-level backlight and when
> +		 * it is on 0, the RGB is not visible at all. RGB should be treated as
> +		 * an additional step.
> +		 */

Ouch. Lets not do that? If rgb interface is available, hide the 3
level one, or something.

> +		mc_cdev->led_cdev.name =   "asus::multicolour::kbd_backlight";

Make this "rgb:kbd_backlight" or "inputX:rgb:kbd_backligh" and
document it in Documentation/leds/well-known-leds.txt.

Thanks and best regards,
										Pavel
-- 
People of Russia, stop Putin before his war on Ukraine escalates.

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