linux-kernel - Re: [PATCH] drivers/platform/x86/thinkpad

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Message-ID: <20121227055127.GD17472@x1.alien8.de>
Date:	Thu, 27 Dec 2012 06:51:27 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	Richard Hartmann <richih.mailinglist@...il.com>
Cc:	ibm-acpi-devel@...ts.sourceforge.net, ibm-acpi@....eng.br,
	linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org
Subject: Re: [PATCH] drivers/platform/x86/thinkpad_acpi.c: Handle HKEY event
 0x6040

On Wed, Dec 26, 2012 at 06:46:13PM +0100, Richard Hartmann wrote:
> Handle HKEY event generated on AC power change. The current message
> asks users to submit data related to this event which leads to
> a lot of confusion and noise on the mailing list.
> 
> The following is a list of causes, affected models, and 'message-id'
> from ibm-acpi-devel@...ts.sourceforge.net :
> 
> AC plug/unplug:
> 
> X120e - CAAAujb5v9dHdbdxDVvhNJoG4UrZC1TgKqeB_zGpAy7q8kZHMEQ@...l.gmail.com
> x121e - 20120817143459.GB3462@...osrc.amd.com
> X220  - Confirmed by Richard Hartmann
> X220i - 4F406274.7070807@...il.com
> X220t - 4F489F5B.9040705@...tu-berlin.de
> X230  - CAKx4u7kqvVH0-gstomsiVYdGC0i6=bGxzaQ8sq9gbg76TGme3w@...l.gmail.com
> T420  - 9c848ee30b006737d0534d906bab0cf6@...laas-baudet.net
> T420s - 20120608080824.GS25324@...apodia.org
> W520  - 20121008181050.GF2549@...claptop.home.christensenplace.us
> 
> Lid closed/openend:
> 
> X220  - 4F4124DF.5030205@...il.com
>         Could not be confirmed by author
> 
> Signed-off-by: Richard Hartmann <richih.mailinglist@...il.com>
> ---
>  drivers/platform/x86/thinkpad_acpi.c |   12 +++++++++---
>  1 file changed, 9 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
> index 75dd651..2645084 100644
> --- a/drivers/platform/x86/thinkpad_acpi.c
> +++ b/drivers/platform/x86/thinkpad_acpi.c
> @@ -209,9 +209,8 @@ enum tpacpi_hkey_event_t {
>  	TP_HKEY_EV_ALARM_SENSOR_XHOT	= 0x6022, /* sensor critically hot */
>  	TP_HKEY_EV_THM_TABLE_CHANGED	= 0x6030, /* thermal table changed */
>  
> -	TP_HKEY_EV_UNK_6040		= 0x6040, /* Related to AC change?
> -						     some sort of APM hint,
> -						     W520 */
> +	/* AC-related events */
> +	TP_HKEY_EV_AC_CHANGED		= 0x6040, /* AC status changed */
>  
>  	/* Misc */
>  	TP_HKEY_EV_RFKILL_CHANGED	= 0x7000, /* rfkill switch changed */
> @@ -3629,6 +3628,13 @@ static bool hotkey_notify_6xxx(const u32 hkey,
>  			 "a sensor reports something is extremely hot!\n");
>  		/* recommended action: immediate sleep/hibernate */
>  		break;
> +	case TP_HKEY_EV_AC_CHANGED:
> +		pr_info("AC status has changed\n");
> +		/* X120e, x121e, X220, X220i, X220t, X230, T420, T420s, W520:
> +		 * AC status changed; can be triggered by plugging or
> +		 * unplugging AC adapter, docking or undocking, or closing
> +		 * or opening the lid. */
> +		break;

It looks like a pretty useless message to me, AFAICT. If it is only an
APM hint, then we probably shouldn't say anything in dmesg but simply
ignore it.

I mean, do I additionally want to know that I just connected to AC after
I just plugged the cable in? There's this green lamp on the side, doh!
:-)

Thanks.

-- 
Regards/Gruss,
Boris.
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