linux-kernel - Re: [PATCH 3/4] dell-wmi: Add information about other WMI event codes

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Date:	Wed, 15 Jun 2016 21:51:07 +0200
From:	Pali Rohár <pali.rohar@...il.com>
To:	Mario_Limonciello@...l.com
Cc:	Gabriele Mazzotta <gabriele.mzt@...il.com>, mjg59@...f.ucam.org,
	dvhart@...radead.org, kernel@...pniu.pl, luto@...nel.org,
	alex.hung@...onical.com, platform-driver-x86@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/4] dell-wmi: Add information about other WMI event codes

On Wednesday 08 June 2016 12:44:44 Gabriele Mazzotta wrote:
> On 08/06/2016 08:02, Mario_Limonciello@...l.com wrote:
> >> -----Original Message-----
> >> From: Pali Rohár [mailto:pali.rohar@...il.com]
> >> Sent: Tuesday, June 7, 2016 6:00 PM
> >> To: Gabriele Mazzotta <gabriele.mzt@...il.com>; Limonciello, Mario
> >> <Mario_Limonciello@...l.com>
> >> Cc: Matthew Garrett <mjg59@...f.ucam.org>; Darren Hart
> >> <dvhart@...radead.org>; Michał Kępień <kernel@...pniu.pl>; Andy
> >> Lutomirski <luto@...nel.org>; Alex Hung
> >> <alex.hung@...onical.com>; platform-driver- x86@...r.kernel.org;
> >> linux-kernel@...r.kernel.org
> >> Subject: Re: [PATCH 3/4] dell-wmi: Add information about other WMI
> >> event codes
> >> 
> >> On Friday 27 May 2016 00:04:23 Gabriele Mazzotta wrote:
> >>> On 22/05/2016 13:36, Pali Rohár wrote:
> >>>> ACPI DSDT tables have defined other WMI codes, but does not
> >>>> contain any description when those codes are emitted. Some
> >>>> other codes can be found in logs on internet. In this patch are
> >>>> all which I saw, but lot of them are not tested properly (e.g.
> >>>> for duplicate events with AT keyboard). Now we have all WMI
> >>>> event codes at one place and in future after proper testing
> >>>> those codes can be correctly enabled or
> >> 
> >> disabled...
> >> 
> >>>> Signed-off-by: Pali Rohár <pali.rohar@...il.com>
> >>>> ---
> >>>> 
> >>>>  drivers/platform/x86/dell-wmi.c |   32
> >> 
> >> ++++++++++++++++++++++++++++++++
> >> 
> >>>>  1 file changed, 32 insertions(+)
> >>>> 
> >>>> diff --git a/drivers/platform/x86/dell-wmi.c
> >>>> b/drivers/platform/x86/dell-wmi.c index 363d927..7aac1dc 100644
> >>>> --- a/drivers/platform/x86/dell-wmi.c
> >>>> +++ b/drivers/platform/x86/dell-wmi.c
> >>>> @@ -110,6 +110,9 @@ static const struct key_entry
> >> 
> >> dell_wmi_legacy_keymap[] __initconst = {
> >> 
> >>>>  	/* BIOS error detected */
> >>>>  	{ KE_IGNORE, 0xe00d, { KEY_RESERVED } },
> >>>> 
> >>>> +	/* Unknown, defined in ACPI DSDT */
> >>>> +	/* { KE_IGNORE, 0xe00e, { KEY_RESERVED } }, */
> >>>> +
> >>> 
> >>> I'm interested in knowing what's the meaning of this 0xe00e. This
> >>> event is sent multiple times when I suspend/resume my laptop and
> >>> it's definitely not a keypress.
> >> 
> >> From DSDT dumps which I have seen, I guess it could be something
> >> with battery charging... but that is only my guess.
> >> 
> >> Mario, do you have any idea, what these unknown events are?
> > 
> > Off-hand I'm not sure, it would require some more digging.
> > 
> > Can you please remind me what model numbers and BIOS combinations
> > you have found e00e in DSDT and what context the events are
> > actually happening? Anything released in the past two years?
> 
> XPS13 9333, BIOS A07.
> 
> I think I saw the event only after resuming from suspend and
> it's sent four times in a row.
> 
> As Pali says, it seems to be related to the battery. There are
> three _Qxx ACPI methods in my DSDT sending this event: one stops
> battery charging, one detaches the battery and the last one stores
> a value on the GNVS.

Mario, were you able to identify something?

-- 
Pali Rohár
pali.rohar@...il.com

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