linux-kernel - Re: [PATCH] pinctrl: intel: save HOSTSW

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Message-ID: <20171117064904.GZ17200@lahna.fi.intel.com>
Date:   Fri, 17 Nov 2017 08:49:04 +0200
From:   Mika Westerberg <mika.westerberg@...ux.intel.com>
To:     Chris Chiu <chiu@...lessm.com>
Cc:     heikki.krogerus@...ux.intel.com,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        Linux Upstreaming Team <linux@...lessm.com>
Subject: Re: [PATCH] pinctrl: intel: save HOSTSW_OWN register over
 suspend/resume

On Thu, Nov 16, 2017 at 09:27:51PM +0800, Chris Chiu wrote:
> On Thu, Nov 16, 2017 at 8:44 PM, Mika Westerberg
> <mika.westerberg@...ux.intel.com> wrote:
> > On Wed, Nov 15, 2017 at 06:19:56PM +0800, Chris Chiu wrote:
> >> Hi Mika,
> >>     I've confirmed with Asus and they said it's the latest BIOS for
> >> shipment and verified OK on Windows. So their BIOS team will not do
> >> anything for this.
> >
> > I'll ask around if our Windows people know anything about this. My gut
> > feeling is that the Windows driver does not touch HOSTSW_OWN either.
> 
> Thanks. Please let me know if you need any information. I still keep
> the machine.

Got confirmation from Windows people. So Windows pretty much saves and
restores the same registers than we do (padcfg + ie).

Have you tried whether s2idle works instead of S3 suspend? You can try
it like

  # echo freeze > /sys/power/state

If that works, I'm guessing that this system uses s2idle and that's also
what Windows uses and could explain why it works in Windows.