linux-kernel - Re: [PATCH] platform/x86: Add Driver to set up lid GPEs on MS Surface device

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Message-ID: <20200915211950.GL103884@mtg-dev.jf.intel.com>
Date:   Tue, 15 Sep 2020 14:19:50 -0700
From:   mark gross <mgross@...ux.intel.com>
To:     Maximilian Luz <luzmaximilian@...il.com>
Cc:     Darren Hart <dvhart@...radead.org>,
        Andy Shevchenko <andy@...radead.org>,
        Hans de Goede <hdegoede@...hat.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Gayatri Kammela <gayatri.kammela@...el.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>,
        platform-driver-x86@...r.kernel.org, linux-acpi@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] platform/x86: Add Driver to set up lid GPEs on MS
 Surface device

On Sat, Sep 12, 2020 at 12:46:30AM +0200, Maximilian Luz wrote:
> On 9/12/20 12:10 AM, mark gross wrote:
> > Surface devices are tablets with detachable keyboards.  they don't really
> > have a "lid" as the tablet is the "lid".
> 
> The Surface Laptop series doesn't have a detachable keyboard, yet still
> requires this. Arguably, the Surface Books are also more laptop than
> tablet (at least that's the way I use mine...). Finally, on the actual
> tablets (Surface Pro series) the lid switch detects when the keyboard
> cover is opened (or at least that's what I have been told, I don't
> own/have access to a Pro series device).
> 
> Regardless of that, this patch is intended to provide the same behavior
> as found on Windows, for all devices included in this patch, which is:
> When you open the lid, or in case of the Pro series fold away the
> keyboard cover, the device wakes from suspend/s2idle. Without this
> patch, that doesn't work.
> 
> > I'm just questioning if the creator of the device designed it the way they did
> > maybe we should think twice about doing this.
> 
> As far as I can tell, the intended behavior is to wake the device when
> the lid is opened, which on the Laptops and Books is a more conventional
> lid and on the Pros constitutes opening the cover.
> 
> I'm open for any alternative though.
> 
> Also please note that I've already sent a v2 of this patch with Andy's
> comments addressed: https://lore.kernel.org/patchwork/patch/1303997/
never mind then.
--mark