linux-kernel - Re: [PATCH v3 2/6] asus-wmi: Implement TUF laptop keyboard LED modes

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Date:   Tue, 9 Aug 2022 11:22:55 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     "Luke D. Jones" <luke@...nes.dev>
Cc:     Hans de Goede <hdegoede@...hat.com>,
        Barnabás Pőcze <pobrn@...tonmail.com>,
        Pavel Machek <pavel@....cz>,
        Platform Driver <platform-driver-x86@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 2/6] asus-wmi: Implement TUF laptop keyboard LED modes

On Tue, Aug 9, 2022 at 4:51 AM Luke D. Jones <luke@...nes.dev> wrote:
>
> Adds support for changing the laptop keyboard LED modes. These
> are visible effects such as static, rainbow, pulsing, colour cycles.
>
> These sysfs attributes are added to asus-nb-wmi:
> - keyboard_rgb_save
> - keyboard_rgb_mode
> - keyboard_rgb_speed

...

> +What:          /sys/devices/platform/<platform>/keyboard_rgb_speed
> +Date:          Aug 2022
> +KernelVersion: 6.1
> +Contact:       "Luke Jones" <luke@...nes.dev>
> +Description:
> +               Set the speed of the selected RGB effect, the speed will not apply
> +               until the keyboard_rgb_save attribute is set (write-only):
> +                       * 0 - slow
> +                       * 1 - medium
> +                       * 2 - fast

> \ No newline at end of file

^^^

...

> +       u8 save;
> +       int err;

> +
> +       struct asus_wmi *asus = dev_get_drvdata(device);
> +       struct led_classdev *cdev = &asus->keyboard_rgb_led.dev.led_cdev;

No blank line in the definition block and try to keep "the longest
line first", a.k.a. reversed xmas tree ordering.

...

> +       u8 mode;
> +
> +       struct asus_wmi *asus = dev_get_drvdata(device);

Ditto.

I would really recommend you spending some time to read the existing
code (better recent one) and look for the common patterns.

...

> +       /* These are the known usable modes across all TUF/ROG */
> +       if (mode >= 12 || mode == 10)

The second condition was different in previous versions. Or am I
confused by another patch series?

> +         asus->keyboard_rgb_led.mode = 10;
> +       else
> +         asus->keyboard_rgb_led.mode = mode;

...

> +
> +

Single blank line is enough.

...

> -               struct mc_subled *mc_led_info = asus->keyboard_rgb_mode.subled_info;
> -               struct led_classdev_mc *mc_cdev = &asus->keyboard_rgb_mode.dev;
> +               struct mc_subled *mc_led_info = asus->keyboard_rgb_led.subled_info;
> +               struct led_classdev_mc *mc_cdev = &asus->keyboard_rgb_led.dev;

Not sure why this change happened...

> -               asus->keyboard_rgb_mode.save = 1;
> -               asus->keyboard_rgb_mode.mode = 0;
> -               asus->keyboard_rgb_mode.speed = 0xeb;
> +               asus->keyboard_rgb_led.save = 1;
> +               asus->keyboard_rgb_led.mode = 0;
> +               asus->keyboard_rgb_led.speed = 0xeb;

...and this.
Is it some kind of renaming? Can you split it to another patch if it
was initially like that?

-- 
With Best Regards,
Andy Shevchenko