Message-ID: <CAAd53p7_RbZDA=VgMQJtC23K0-WqteJH=cmC2WQMY1hAzC7bSQ@mail.gmail.com>
Date:   Wed, 28 Jun 2023 09:20:54 +0800
From:   Kai-Heng Feng <kai.heng.feng@...onical.com>
To:     Pascal Terjan <pterjan@...il.com>
Cc:     Ulf Hansson <ulf.hansson@...aro.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-mmc@...r.kernel.org, Ricky WU <ricky_wu@...ltek.com>,
        Oleksandr Natalenko <oleksandr@...alenko.name>
Subject: Re: rtsx_usb_sdmmc not detecting card insertion anymore

On Wed, Jun 28, 2023 at 4:29 AM Pascal Terjan <pterjan@...il.com> wrote:
>
> On Tue, 27 Jun 2023 at 14:23, Kai-Heng Feng <kai.heng.feng@...onical.com> wrote:
> >
> > On Tue, Jun 27, 2023 at 7:01 PM Ulf Hansson <ulf.hansson@...aro.org> wrote:
> > >
> > > + Ricky WU, Kai Heng Feng, Oleksandr Natalenko
> > >
> > > On Sat, 24 Jun 2023 at 22:39, Pascal Terjan <pterjan@...il.com> wrote:
> > > >
> > > > Hi,
> > > > I have an ASUS PN50 machine with a 0bda:0129 card reader. The card is
> > > > not seen unless I reload the rtsx_usb_sdmmc module.
> > >
> > > Thanks for reporting, let's see how we can move this forward.
> > >
> > > I have looped in some of the people that has been involved in the
> > > relevant changes for rtsx_usb. Let's see if they can help too.
> > >
> > > >
> > > > I found a Debian bug report for the same regression
> > > > https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=993068 but nothing
> > > > to see there.
> > > >
> > > > Trying to understand things I found
> > > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4dad599b8b5d1ffc5ef12a2edb13d15d537202ba
> > > > which seemed related, so I first tried to revert it and that worked.
> > >
> > > Okay! That's certainly good information. Are you willing to help
> > > running further debug testings?
> > >
> > > Unless I mistaken, I think we should avoid doing a plain revert
> > > (assuming we can find another option) as it will cause us to waste a
> > > lot of energy instead.
> > >
> > > >
> > > > Assuming the description is correct and the rtsx USB driver runtime
> > > > resumes the rtsx_usb_sdmmc device when it detects that a new card has
> > > > been inserted, I assume this means it doesn't detect that a card was
> > > > inserted and the problem would be in rtsx_usb rather than
> > > > rtsx_usb_sdmmc.
> > >
> > > There is also another interesting commit, which was also part of the
> > > re-work of the rtsx_usb_sdmmc driver that you pointed to above.
> > >
> > > commit 883a87ddf2f1 (misc: rtsx_usb: Use USB remote wakeup signaling
> > > for card insertion detection")
> > >
> > > >
> > > > I am not sure how to debug this further, usbmon doesn't see anything
> > > > when I insert the card.
> > >
> > > If you are willing to run some tests, I suggest to add some debug prints in:
> > > drivers/mmc/host/rtsx_usb_sdmmc.c
> > >   sdmmc_get_cd()
> > >   rtsx_usb_sdmmc_runtime_resume()
> > >   rtsx_usb_sdmmc_runtime_suspend()
> > >
> > > sdmmc_get_cd() should be returning 1 when it finds that there is card
> > > inserted, but of course the error path would be interesting too.
> > >
> > > rtsx_usb_sdmmc_runtime_resume() may be called during probing of the
> > > rtsx_usb_sdmmc driver. Beyond that point, it should also be called
> > > when you insert an SD card. Just having a debug print in there should
> > > help answer if that actually happens.
> >
> > Adding kernel parameter "usbcore.dyndbg" can also help, it will print
> > out what's going on at USB side.
>
> Nothing happens for that device (4-4), I only get others (1, 2, 3, 5,
> 7) waking up repeatedly:

Interesting. Waking up repeatedly may be the root cause.

Is it possible to file a bug at bugzilla and attach full dmesg?

Kai-Heng

>
> [  316.890285] usb usb7: usb auto-resume
> [  316.890322] hub 7-0:1.0: hub_resume
> [  316.912386] hub 7-0:1.0: state 7 ports 2 chg 0000 evt 0000
> [  316.912460] hub 7-0:1.0: hub_suspend
> [  316.912470] usb usb7: bus auto-suspend, wakeup 1
> [  316.912595] usb usb5: usb auto-resume
> [  316.912624] hub 5-0:1.0: hub_resume
> [  316.934386] hub 5-0:1.0: state 7 ports 2 chg 0000 evt 0000
> [  316.934460] hub 5-0:1.0: hub_suspend
> [  316.934471] usb usb5: bus auto-suspend, wakeup 1
> [  316.934595] usb usb3: usb auto-resume
> [  316.934609] hub 3-0:1.0: hub_resume
> [  316.956385] hub 3-0:1.0: state 7 ports 2 chg 0000 evt 0000
> [  316.956456] hub 3-0:1.0: hub_suspend
> [  316.956466] usb usb3: bus auto-suspend, wakeup 1
> [  316.956540] usb usb2: usb auto-resume
> [  316.956553] hub 2-0:1.0: hub_resume
> [  316.956576] hub 2-0:1.0: state 7 ports 2 chg 0000 evt 0000
> [  316.956594] hub 2-0:1.0: hub_suspend
> [  316.956600] usb usb2: bus auto-suspend, wakeup 1
> [  316.956626] usb usb1: usb auto-resume
> [  316.956662] hub 1-0:1.0: hub_resume
> [  316.956679] hub 1-0:1.0: state 7 ports 1 chg 0000 evt 0000
> [  316.956697] hub 1-0:1.0: hub_suspend
> [  316.956703] usb usb1: bus auto-suspend, wakeup 1
>
> The only time I get a log for it is when I reload the module with the
> card in, and then eject the card:
>
> [  278.743368] usb 4-4: kworker/15:1 timed out on ep2in len=0/8

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