linux-kernel - Re: Cherryview wake up events

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Message-ID: <20170127133058.pxuovuuqpnffx3py@sig21.net>
Date:   Fri, 27 Jan 2017 14:30:58 +0100
From:   Johannes Stezenbach <js@...21.net>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
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 03:21:22PM +0200, Andy Shevchenko wrote:
> 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.

I'll check it.

> > 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

Not sure because it happens with i915 module not loaded
(currently I load it manually after boot completed).
But thanks for the link.

Johannes