Re: PROBLEM: Baytrail tablet touchscreen fails after pinctrl commit [3ae02c14d964499da76b5ef4d8912710902e64f8]

[Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>]

On Sat, Jan 7, 2017 at 10:14 AM, Andy Shevchenko
<andriy.shevchenko@xxxxxxxxxxxxxxx> wrote:
> On Fri, 2017-01-06 at 02:30 -0700, Robert R. Howell wrote:
>> [1.]  Baytrail tablet touchscreen fails after pinctrl commit
>> [3ae02c14d964499da76b5ef4d8912710902e64f8]
>>
>> [2.]  Beginning with kernel 4.10-rc1 (and continuing with 4.10-rc2)
>> the
>> touchscreen on two Baytrail devices, an ASUS T100TA and a Toshiba
>> Encore
>> 8, no longer works.  They did work properly up though at least 4.9.0.
>> As
>> indicated in the DMESG output appended below, the ATML1000
>> touchscreen
>> controller fails to reset and initialize properly on boot. The reset
>> command issued through i2c_hid appears to time out after its 5 second
>> wait for completion.  (There are similar problems with an i2c
>> orientation sensor.)  Using git bisect I've found that the problem
>> begins with commit [3ae02c14d964499da76b5ef4d8912710902e64f8]
>> pinctrl: intel: set default handler to be handle_bad_irq()
>>
>> I've appended the git bisect log output at the end.  Reverting that
>> single commit (tested with 4.10-rc2) fixes the problem.
>
> Thanks for the report. For me it looks like that commit actually
> discovers other problems we have in the code somewhere.
>
> Yeah, I confirm the issue on T100TA. I will investigate this next week.

This still happens on chromeOS Baytrail devices with -rc6 here as
well. Can we revert this and try again in 4.11 timeframe?

Thanks.

-- 
Dmitry
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