linux-pci.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Konstantin Kharlamov <hi-angel@yandex.ru>
To: Bjorn Helgaas <helgaas@kernel.org>
Cc: linux-pci@vger.kernel.org,
	"Rafael J. Wysocki" <rjw@rjwysocki.net>,
	Andreas Noever <andreas.noever@gmail.com>,
	linux-pm@vger.kernel.org, Lukas Wunner <lukas@wunner.de>
Subject: Re: [PATCH] PCI: don't power-off apple thunderbolt controller on s2idle
Date: Fri, 07 May 2021 16:48:41 +0300	[thread overview]
Message-ID: <5a241026101100958745fb5ca786df92a5d4518b.camel@yandex.ru> (raw)
In-Reply-To: <20210507130724.GA1499364@bjorn-Precision-5520>

On Fri, 2021-05-07 at 08:07 -0500, Bjorn Helgaas wrote:
> [+cc Lukas]
> 
> On Fri, May 07, 2021 at 12:32:20PM +0300, Konstantin Kharlamov wrote:
> > On Thu, 2021-05-06 at 16:48 -0500, Bjorn Helgaas wrote:
> > > [+cc Rafael, Andreas, linux-pm]
> > > 
> > > On Thu, May 06, 2021 at 08:38:20PM +0300, Konstantin Kharlamov wrote:
> > > > On Macbook 2013 resuming from s2idle results in external monitor no
> > > > longer being detected, and dmesg having errors like:
> > > > 
> > > >     pcieport 0000:06:00.0: can't change power state from D3hot to D0
> > > > (config
> > > > space inaccessible)
> > > > 
> > > > and a stacktrace. The reason turned out that the hw that the quirk
> > > > powers off does not get powered on back on resume.
> > > 
> > > quirk_apple_poweroff_thunderbolt() was added in 2014 by 1df5172c5c25
> > > ("PCI: Suspend/resume quirks for Apple thunderbolt").  It claims
> > > "power is automatically restored before resume," so there must be
> > > something special about s2idle that prevents the power-on.
> > > 
> > > IIUC this change will reduce the s2idle power savings.  I would feel
> > > better about this if we understood what the difference was.  
> > > 
> > > > Thus, add a check for s2idle to the quirk, and do nothing if the suspend
> > > > mode is s2idle.
> > > 
> > > Obviously the *hardware* hasn't changed since 1df5172c5c25.  Is s2idle
> > > something that wasn't tested back then, or is this problem connected
> > > to an s2idle change since then?  Can we identify a commit that
> > > introduced this problem?  That would help with backporting or stable
> > > tags.
> > > 
> > > > Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=212767
> > > 
> > > Thanks for this!  Would you mind attaching the output of
> > > "sudo lspci -vvv"?  If you attach any other dmesg, could you
> > > use "dmesg --color=never" so the log doesn't include all the
> > > escape characters?
> > 
> > Thank you! So, just to be clear: in lieu of Lukas Wunner's reply, do
> > you still want `lspci` and `dmesg` outputs, or are you okay with the
> > information Lukas provided?
> 
> Yes, please attach at least lspci output.  It helps understand the
> topology and may be useful in the future.  I wish we had a similar
> bugzilla with more information about the original 1df5172c5c25.

Thanks! I attached the `sudo lspci -vvv` output to the bugreport, here's a direct link to the attachment https://bugzilla.kernel.org/attachment.cgi?id=296689


  reply	other threads:[~2021-05-07 13:48 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-06 17:38 [PATCH] PCI: don't power-off apple thunderbolt controller on s2idle Konstantin Kharlamov
2021-05-06 21:48 ` Bjorn Helgaas
2021-05-06 22:07   ` Lukas Wunner
2021-05-07  9:51     ` Rafael J. Wysocki
2021-05-08  8:48       ` Lukas Wunner
2021-05-07 13:30     ` Bjorn Helgaas
2021-05-07 14:08       ` Konstantin Kharlamov
2021-05-12 20:36         ` Konstantin Kharlamov
2021-05-17 19:51           ` PING " Konstantin Kharlamov
2021-05-19 17:28         ` Bjorn Helgaas
2021-05-19 19:12           ` Rafael J. Wysocki
2021-05-19 19:48             ` Bjorn Helgaas
2021-05-20 11:27               ` Rafael J. Wysocki
2021-05-20 11:54                 ` Rafael J. Wysocki
2021-05-20 19:49                   ` Bjorn Helgaas
2021-05-20 23:28                     ` Konstantin Kharlamov
2021-05-24  6:59                       ` Konstantin Kharlamov
2021-05-20 23:55                     ` [PATCH v2] PCI: don't call firmware hooks on suspend unless it's fw-controlled Konstantin Kharlamov
2021-05-28  7:39                       ` PING: " Konstantin Kharlamov
2021-06-03  8:36                         ` PING: " Konstantin Kharlamov
2021-06-03 17:46                           ` Bjorn Helgaas
2021-06-04  8:30                             ` Konstantin Kharlamov
2021-05-21  9:47                     ` [PATCH] PCI: don't power-off apple thunderbolt controller on s2idle Rafael J. Wysocki
2021-05-07 15:02       ` Rafael J. Wysocki
2021-05-08  8:20       ` Lukas Wunner
2021-05-07  9:32   ` Konstantin Kharlamov
2021-05-07 13:07     ` Bjorn Helgaas
2021-05-07 13:48       ` Konstantin Kharlamov [this message]
2021-05-20 11:58   ` Rafael J. Wysocki
2021-06-07 23:17 ` Bjorn Helgaas

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=5a241026101100958745fb5ca786df92a5d4518b.camel@yandex.ru \
    --to=hi-angel@yandex.ru \
    --cc=andreas.noever@gmail.com \
    --cc=helgaas@kernel.org \
    --cc=linux-pci@vger.kernel.org \
    --cc=linux-pm@vger.kernel.org \
    --cc=lukas@wunner.de \
    --cc=rjw@rjwysocki.net \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).