linux-kernel - Re: [PATCH 1/2] platform/x86: asus-wmi: Call new led hw

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Date:   Mon, 4 Jun 2018 09:46:06 -0600
From:   Azael Avalos <coproscefalo@...il.com>
To:     Hans de Goede <hdegoede@...hat.com>
Cc:     Daniel Drake <drake@...lessm.com>, Chris Chiu <chiu@...lessm.com>,
        Corentin Chary <corentin.chary@...il.com>,
        Darren Hart <dvhart@...radead.org>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Linux Kernel <linux-kernel@...r.kernel.org>,
        Platform Driver <platform-driver-x86@...r.kernel.org>,
        acpi4asus-user <acpi4asus-user@...ts.sourceforge.net>,
        Linux Upstreaming Team <linux@...lessm.com>,
        Bastien Nocera <hadess@...ess.net>,
        Benjamin Berg <benjamin@...solutions.net>
Subject: Re: [PATCH 1/2] platform/x86: asus-wmi: Call new led hw_changed API
 on kbd brightness change

Hi there

Let me add my two cents on the Toshiba side.

2018-06-04 8:23 GMT-06:00 Hans de Goede <hdegoede@...hat.com>:

>
> 1) drivers/platform/x86/toshiba_acpi.c
>
> I don't know how the key on Toshiba's behaves on models where
> it is hardwired / under Windows

With Toshiba we have two types of hardware implementations:

1st gen keyboards, supporting AUTO and FN-Z
AUTO - Turns on/off automatically after some (configurable) time
FN-Z - Creates "toshiba::kbd_backlight" and it's toggled by userspace

2nd gen keyborads, supporting AUTO, ON and OFF
AUTO - Ditto
ON - Always on
OFF - Always off

The second gen keyboards are completely driven by hardware,
userspace must be checking sysfs for "kbd_backlight_mode"
changes, however, the Toshiba interface emits the 0x92
ACPI event when we have a kbd mode change, but it's not
currently being transmitted to userspace via netlink.


Saludos
Azael


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