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Subject: Re: [BUG] i2c-hid: ELAN Touchpad does not work on ASUS X580GD
To:     Jarkko Nikula <jarkko.nikula@linux.intel.com>,
        Chris Chiu <chiu@endlessm.com>
Cc:     Daniel Drake <drake@endlessm.com>,
        Jian-Hong Pan <jian-hong@endlessm.com>,
        Jiri Kosina <jikos@kernel.org>,
        Benjamin Tissoires <benjamin.tissoires@redhat.com>,
        Jani Nikula <jani.nikula@intel.com>,
        Dmitry Torokhov <dmitry.torokhov@gmail.com>,
        Adrian Salido <salidoa@google.com>,
        Jason Gerecke <killertofu@gmail.com>,
        linux-input <linux-input@vger.kernel.org>,
        Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
        Mika Westerberg <mika.westerberg@linux.intel.com>,
        Wolfram Sang <wsa@the-dreams.de>, linux-i2c@vger.kernel.org,
        Linux Kernel <linux-kernel@vger.kernel.org>,
        Linux Upstreaming Team <linux@endlessm.com>
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From:   Hans de Goede <hdegoede@redhat.com>
Message-ID: <62b6f02c-d619-6e51-a107-331f0648e832@redhat.com>
Date:   Fri, 18 May 2018 15:26:13 +0200
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Hi,

On 18-05-18 15:15, Jarkko Nikula wrote:
> On 05/18/2018 10:48 AM, Hans de Goede wrote:
>> Could it be the i2c input clock definition in drivers/mfd/intel-lpss-pci.c
>> is also wrong for Apollo Lake (N3450) ?  There are lots of people having
>> various issues with i2c attached touchpads on Apollo Lake devices, this bug:
>> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1728244
>>
>> Is sort of a collection bug for these. Various models laptops, lots of
>> reporters. Note not sure thie is an i2c-designware issue, but it would
>> be good to double check the input clock on Apollo Lake.
>>
> Does i2c_designware_core.dyndbg=+p and i2c-hid.debug=1 command line arguments give any useful debug information from those machines?

I've asked people in the bug to collect debug output with this
added.

Regards,

Hans