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

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Message-ID: <49F89A5C.2090508@dell.com>
Date:	Wed, 29 Apr 2009 13:20:12 -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}
>  };
>   
Yeah, that patch looks good.  I personally still think it would  be 
better to "catch" the WMI events for those OSD type keys and do nothing
rather than litter them in dmesg, but this is sane for now otherwise.

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


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