linux-kernel - Re: intel-gpio interrupts stop firing with Focaltech I2C-HID touchpad

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Date:   Fri, 17 Nov 2017 17:13:52 +0800
From:   Chris Chiu <chiu@...lessm.com>
To:     Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:     Daniel Drake <drake@...lessm.com>, heikki.krogerus@...ux.intel.com,
        linux-gpio@...r.kernel.org,
        Linux Kernel <linux-kernel@...r.kernel.org>,
        Endless Linux Upstreaming Team <linux@...lessm.com>,
        Jarkko Nikula <jarkko.nikula@...ux.intel.com>
Subject: Re: intel-gpio interrupts stop firing with Focaltech I2C-HID touchpad

On Fri, Nov 17, 2017 at 5:11 PM, Mika Westerberg
<mika.westerberg@...ux.intel.com> wrote:
> On Fri, Nov 17, 2017 at 04:27:39PM +0800, Chris Chiu wrote:
>> On Thu, Nov 16, 2017 at 9:07 PM, Mika Westerberg
>> <mika.westerberg@...ux.intel.com> wrote:
>> > On Thu, Nov 16, 2017 at 12:01:24PM +0000, Daniel Drake wrote:
>> >> On Thu, Nov 16, 2017 at 11:52 AM, Mika Westerberg
>> >> <mika.westerberg@...ux.intel.com> wrote:
>> >> > Please first check the signal with some analyzator if it works as
>> >> > expected and let's then figure out what needs to be fixed and where ;-)
>> >>
>> >> It works fine under Windows, so I think it's already clear that there
>> >> is a Linux bug to be solved here.
>> >
>> > Can you remove all the "debugging" patches and hacks and then add
>> > "i2c_hid.debug=1" to the kernel command line.
>> >
>> > Then reproduce the issue and send me full dmesg and acpidump of the
>> > system. Thanks.
>>
>> Hi Mika,
>>     Here's the dmesg log which stops at 214th seconds and no more
>> further output and archive of "acpidump -b" output files FYI.
>
> Thanks!
>
> The dmesg is not complete, I wonder if you can make the buffer a bit
> bigger by increasing CONFIG_LOG_BUF_SHIFT (or get it from
> /var/log/messages or so). I would like to see i2c-hid init and related
> messages.
>
> From the acpidump related to the i2c-hid device, the system provides
> custom I2C timings via FMCN ACPI method but it misses one value
> (sda_hold). Not sure if if has anything to do with the problem, though.
> Adding Jarkko in case he has any ideas.
>
> BTW, is this the same machine which has problems in S3 suspend/resume?

Hi Mika,
   Yes. This machine has the problem in S3 suspend/resume, too.

Chris