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

[Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>]

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.

-- 
Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Intel Finland Oy
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