linux-kernel - Re: [PATCH 1/3] Add support for more dell-wmi hotkeys

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Message-ID: <4A0B0866.2040402@dell.com>
Date:	Wed, 13 May 2009 12:50:30 -0500
From:	Mario Limonciello <mario_limonciello@...l.com>
To:	Matthew Garrett <mjg59@...f.ucam.org>
CC:	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] Add support for more dell-wmi hotkeys

Hi Matthew:

Matthew Garrett wrote:
> This is the version I'm planning on applying - look ok? I've skipped the 
> OSD stuff, since right now we're not going to do anything terribly 
> useful with them. I'd prefer some consensus on where we're going with 
> these notifications.
>
> commit d0cc3d9de1b8e97a7176ddc7efe48239896100c1
> Author: Matthew Garrett <mjg@...hat.com>
> Date:   Wed Apr 29 18:07:30 2009 +0100
>
>     From: Mario Limonciello <mario_limonciello@...l.com>
>     
>     dell-wmi: Add additional keyboard events
>     
>     Upcoming Dell hardware will send more keyboard events via WMI. Add support
>     for them.
>     
>     Signed-off-by: Mario Limonciello <mario_limonciello@...l.com>
>
> diff --git a/drivers/platform/x86/dell-wmi.c b/drivers/platform/x86/dell-wmi.c
> index 81d7179..847f486 100644
> --- a/drivers/platform/x86/dell-wmi.c
> +++ b/drivers/platform/x86/dell-wmi.c
> @@ -48,8 +48,49 @@ struct key_entry {
>  
>  enum { KE_KEY, KE_SW, KE_END };
>  
> +/*
> + * There are some additional events sent as scancodes, but these are
> + * not currently terribly relevant to Linux. They are:
> + * 
> + * 0xe020: Mute
> + * 0xe02e: Volume down
> + * 0xe030: Volume up
> + * 0xe00c: Keyboard illumination toggle
> + * 0xe033: Keyboard illumination up
> + * 0xe034: Keyboard illumination down
> + * 0xe00d: BIOS error detected
> + * 0xe013: Ambient light sensor toggle
> + * 0xe03a: Caps lock
> + * 0xe045: Num lock
> + * 0xe046: Scroll lock
> + *
> + * All of these are either notifications (rather than requests for change) or
> + * are also sent via the keyboard controller
> + */
> +
>  static struct key_entry dell_wmi_keymap[] = {
>  	{KE_KEY, 0xe045, KEY_PROG1},
> +        {KE_KEY, 0xe009, KEY_EJECTCD},
> +
> +	/* These also contain the brightness level at offset 6 */
> +	{KE_KEY, 0xe006, KEY_BRIGHTNESSUP},
> +	{KE_KEY, 0xe005, KEY_BRIGHTNESSDOWN},
> +
> +	/* The next device is at offset 6, the active devices are at
> +	   offset 8 and the attached devices at offset 10 */
> +	{KE_KEY, 0xe00b, KEY_DISPLAYTOGGLE},
> +
> +	/* This is actually for all radios. Although physically a
> +	 * switch, the notification does not provide an indication of
> +	 * state and so it should be reported as a key */
> +	{KE_KEY, 0xe008, KEY_WLAN},
> +
> +	/* Wifi Catcher */
> +	{KE_KEY, 0xe011, KEY_PROG2},
> +
> +	/* Battery health status button */
> +	{KE_KEY, 0xe007, KEY_BATTERY},
> +
>  	{KE_END, 0}
>  };
>   
Two additional comments:

1) Rather  than KEY_DISPLAYTOGGLE, it would make more sense to use
KEY_SWITCHVIDEOMODE.

2) There is another scancode that should be tied to KEY_SWITCHVIDEOMODE,
0xe09b.  Machines will support one or the other, but not both.

Regards

-- 
Mario Limonciello
*Dell | Linux Engineering*
mario_limonciello@...l.com


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