linux-kernel - Re: [PATCH 2/3] platform/x86: dell-wmi: add new keymap type 0x0012

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Message-ID: <20200609080428.bjlimc2mfhn6hjbs@pali>
Date:   Tue, 9 Jun 2020 10:04:28 +0200
From:   Pali Rohár <pali@...nel.org>
To:     Mario.Limonciello@...l.com
Cc:     y.linux@...itcher.com, linux-kernel@...r.kernel.org,
        platform-driver-x86@...r.kernel.org, mjg59@...f.ucam.org
Subject: Re: [PATCH 2/3] platform/x86: dell-wmi: add new keymap type 0x0012

On Monday 08 June 2020 15:40:53 Mario.Limonciello@...l.com wrote:
> > dell_wmi: Unknown WMI event type 0x12
> > dell_wmi: Unknown key with type 0x0012 and code 0xe035 pressed
> 
> Event type 0x12 is for "System Events".  This is the type of events that
> you typically would see come in for things "like" the wrong power adapter
> being plugged in on Windows or stuff about plugging a Thunderbolt dock into
> a port that doesn't support Thunderbolt.
> 
> A message might look something like (paraphrased)
> "Your system requires a 180W power adapter to charge effectively, but you
> plugged in a 60W adapter."
> 
> There often is extended data with these events.  As such I don't believe all
> information in event type 0x0012 should be treated like scan codes like those in
> 0x10 or 0x11.
> 
> I would guess that Fn-lock on this machine probably has extended data in the next
> showing whether it was turned on and off.  If it does, perhaps it makes sense to
> send this information to userspace as an evdev switch instead.

Thank you for information!

Interesting is that I got this email only now, after all other emails in
this thread. But seems that you have wrote it prior I asked question
about documentation for these events. So probably some email delivery
problem / delay.