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Message-ID: <5476A8AD.4010003@ti.com>
Date: Thu, 27 Nov 2014 09:59:33 +0530
From: Vignesh R <vigneshr@...com>
To: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
CC: Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
Mark Rutland <mark.rutland@....com>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Kumar Gala <galak@...eaurora.org>,
Benoit Cousson <bcousson@...libre.com>,
Tony Lindgren <tony@...mide.com>,
Russell King <linux@....linux.org.uk>,
Jonathan Cameron <jic23@...nel.org>,
Hartmut Knaack <knaack.h@....de>, <richardcochran@...il.com>,
Dmitry Torokhov <dmitry.torokhov@...il.com>,
Lee Jones <lee.jones@...aro.org>,
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Subject: Re: [PATCH v4 0/6] Touchscreen performance related fixes
On Monday 24 November 2014 06:05 PM, Sebastian Andrzej Siewior wrote:
> On 11/24/2014 01:16 PM, Vignesh R wrote:
>
>> I have tried running both IIO and TSC at the same time. But I have never
>> seen WARN_ON() even after running for close to 30 min. Can you send me
>> the exact script, so that it will be easy to reproduce?
>
> Sure thing.
> - one shell
> evtest /dev/input/event2
> - second shell
> ./iio-test.sh
> with:
>
> |#!/bin/sh
> |
> |while [ 1 = 1 ]
> |do
> | cat /sys/bus/iio/devices/iio\:device0/in_voltage4_raw
> |done
>
>
> the kernel config: https://breakpoint.cc/am335x-config
>
I was able to reproduce this issue. When ADC hits WARN_ON(), the TSC
steps should be disabled. But, in this case, TSC is sampling the first Y
co-ordinate and all TSC steps are enabled.
REG_SE: 0x1ffc1
ADC_STAT: 0x24
Any idea why this may be happening?
Regards
Vignesh
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