linux-kernel - Re: [PATCH v4 0/2] i2c-designware: Add support for AMD PSP semaphore

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Date:   Thu, 10 Feb 2022 09:13:15 +0100
From:   Jan Dąbroś <jsd@...ihalf.com>
To:     Jarkko Nikula <jarkko.nikula@...ux.intel.com>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-i2c <linux-i2c@...r.kernel.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Wolfram Sang <wsa@...nel.org>,
        Raul E Rangel <rrangel@...omium.org>,
        Marcin Wojtas <mw@...ihalf.com>,
        Grzegorz Jaszczyk <jaz@...ihalf.com>, upstream@...ihalf.com,
        Tom Lendacky <thomas.lendacky@....com>,
        "Deucher, Alexander" <alexander.deucher@....com>,
        "Easow, Nimesh" <Nimesh.Easow@....com>,
        "Limonciello, Mario" <mario.limonciello@....com>,
        kernel test robot <lkp@...el.com>
Subject: Re: [PATCH v4 0/2] i2c-designware: Add support for AMD PSP semaphore

śr., 9 lut 2022 o 16:11 Jarkko Nikula <jarkko.nikula@...ux.intel.com>
napisał(a):
>
> On 2/8/22 16:12, Jan Dabros wrote:
> > This patchset comprises support for new i2c-designware controller setup on some
> > AMD Cezanne SoCs, where x86 is sharing i2c bus with PSP. PSP uses the same
> > controller and acts as an i2c arbitrator there (x86 is leasing bus from it).
> >
> > First commit aims to improve generic i2c-designware code by adding extra locking
> > on probe() and disable() paths. I would like to ask someone with access to
> > boards which use Intel BayTrail(CONFIG_I2C_DESIGNWARE_BAYTRAIL) to verify
> > behavior of my changes on such setup.
> >
> I'm going to run overnight with both patches a test case that used to
> cause some activity on a shared I2C bus on Baytrail based MRD 7 tablet.
> Test below used to trigger system hang after a few hours - days before
> some PUNIT - graphics related issue was fixed a few years ago:
>
> #!/bin/sh
> X &
> export DISPLAY=:0
> sleep 2
> xclock -update 30 -digital -geometry 500x50+1+1027 &
> xload -update 60 -bg black -hl red -fg green -geometry 1916x250+1+774 &
> sleep 1
> xsetroot -solid red
> xset s noblank s off -dpms
> glxgears >/dev/null &
> while :; do acpi -b; sleep 1.2; done

Thanks, looking forward to the results.

Best Regards,
Jan