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

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Message-ID: <20171121105205.GP22431@lahna.fi.intel.com>
Date:   Tue, 21 Nov 2017 12:52:05 +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 Fri, Nov 17, 2017 at 04:11:31PM +0800, Chris Chiu wrote:
> On Fri, Nov 17, 2017 at 2:49 PM, Mika Westerberg
> <mika.westerberg@...ux.intel.com> wrote:
> > 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.
> 
> Unfortunately, I cant wake it up from neither power button nor any key
> event after  "# echo freeze > /sys/power/state"....

Yeah, it is S3 platform based on the acpidump you shared. Although
freeze should still work.

Have you dumped the pin config registers through debugfs before and
after suspend? Are there any other differences except the HOSTSW_OWN
thing?