Date:   Sun, 2 Jul 2023 12:49:25 +0100
From:   Pascal Terjan <pterjan@...il.com>
To:     Kai-Heng Feng <kai.heng.feng@...onical.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, 28 Jun 2023 at 02:21, Kai-Heng Feng <kai.heng.feng@...onical.com> wrote:
>
> 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?

Sorry for the delay, here it is
https://bugzilla.kernel.org/show_bug.cgi?id=217625

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