linux-kernel - Re: [RFC PATCH 0/2] usb: typec: ucsi: Check connection on resume

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Date:   Fri, 07 Oct 2022 12:00:16 +0200
From:   Bastian Rieck <bastian@...ck.me>
To:     Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        grzegorz.alibozek@...il.com, andrew.co@...e.fr, meven29@...il.com,
        pchernik@...il.com, jorge.cep.mart@...il.com,
        danielmorgan@...root.org, bernie@...ewiz.org,
        saipavanchitta1998@...il.com, rubin@...rset.net,
        maniette@...il.com, nate@....org
Subject: Re: [RFC PATCH 0/2] usb: typec: ucsi: Check connection on resume

Dear Heikki, dear all,

I am still unable to reproduce the previous error messages I 
mentioned. In the meantime, the UCSI issues disappeared with 5.19.9 
for me (!). I think this is related to a revert by Takashi Iwai  [1] 
in 5.19.8.

Given these data, would it be useful to test your patch against 
5.19.9 or a more recent version?

Thanks for all your efforts in supporting us here!

All the best,
 Bastian

[1] https://www.spinics.net/lists/linux-usb/msg230368.html

On Friday, September 16, 2022 12:46:47 PM CEST Heikki Krogerus 
wrote:
> Hi Bastian,
> 
> On Fri, Sep 09, 2022 at 09:22:50AM +0300, Heikki Krogerus wrote:
> > On Thu, Sep 08, 2022 at 07:01:34AM +0200, Bastian Rieck wrote:
> > > Dear Heikki,
> > > 
> > > > I'm sending these as an RFC first because I'm not done
> > > > testing.
> > > > 
> > > > I made a small modification to my original proposal (in the
> > > > bug
> > > > report). Now also connection during suspend should be
> > > > covered.
> > > > 
> > > > I would appreciate if you guys could test these again. If
> > > > everything works, and the bug is fixed, let me know, and
> > > > I'll add
> > > > your Tested-by tags to the patches.
> > > 
> > > Thanks so much for these changes—that's awesome! I have just
> > > finished testing this against 5.19.7 (Arch Linux) with a
> > > Lenovo X1 (Gen 9).
> > > 
> > > I am very happy to see that, as far as I can tell, the issue
> > > disappeared completely!
> > > 
> > > However, I am receiving additional warnings via `journalctl`
> > > that I did not receive before; I have attached this trace as
> > > an additional log file. Nothing in there seems critical and I
> > > can confirm that the system continues to operate normally. I
> > > merely wanted to provide you with this additional information
> > > in case it is of relevance.
> > > 
> > > Please let me know if there's anything else I can do here; I
> > > really appreciate the time you spent on this!
> > 
> > Thank you for the report. That warning certainly needs to be
> > sorted out before I send the final versions. I'll try to
> > reproduce that.
> I'm not getting anywhere with this one. Could you provide me with
> the trace output from both module and ucsi events?
> 
> To enable those events - assuming debugfs is mounted to
> /sys/kernel/debug:
> 
>         % echo 1 > /sys/kernel/debug/tracing/events/ucsi/enable
>         % echo 1 > /sys/kernel/debug/tracing/events/module/enable
> 
> Run the suspend resume cycle, and then dump the trace output to a
> file:
> 
>         % cat /sys/kernel/debug/tracing/trace > ucsi_trace
> 
> thanks,