linux-kernel - Re: Cherryview wake up events

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Date:   Fri, 27 Jan 2017 15:21:22 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Johannes Stezenbach <js@...21.net>
Cc:     Mika Westerberg <mika.westerberg@...ux.intel.com>,
        "linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
        Platform Driver <platform-driver-x86@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        David Cohen <david.a.cohen@...ux.intel.com>
Subject: Re: Cherryview wake up events

On Fri, Jan 27, 2017 at 1:38 PM, Johannes Stezenbach <js@...21.net> wrote:
> On Fri, Jan 27, 2017 at 12:56:53AM +0200, Andy Shevchenko wrote:

> And the same info is also in sysfs:
>
> # cat /sys/devices/LNXSYSTM\:00/LNXSYBUS\:00/PNP0A08\:00/808622C1\:06/INT33F4\:00/status
> 0
> # cat /sys/devices/LNXSYSTM\:00/LNXSYBUS\:00/PNP0A08\:00/808622C1\:06/INT33F5\:00/status
> 15
>
> The DSDT is still at https://linuxtv.org/~js/e200ha/
>
>> Had you tried to add ID to axp20x-i2c.c ?
>
> Nope, since I have no idea if the axp and TI hardware is similar.

I think you would give a try.

> There might be more issues, currently the machine hangs often
> during bootup at random points.  I built i915 as a module and
> blacklisted it for autoloading so I can read the last message
> on the console.  All I can say is that it is more likely to
> hang when the loglevel is high, i.e. it almost never succeeds
> with "debug" on kernel command line.  Sometimes there are
> timeout errors from I2C:
> [    4.307189] i2c_designware 808622C1:06: controller timed out
> [    5.331709] i2c_designware 808622C1:06: controller timed out
>
> Once it has booted it is running stable.

This is known: http://www.spinics.net/lists/intel-gfx/msg117738.html

-- 
With Best Regards,
Andy Shevchenko