From mboxrd@z Thu Jan  1 00:00:00 1970
From: Sebastian Andrzej Siewior <bigeasy-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>
Subject: Re: [PATCH 0/4] Touchscreen performance related fixes
Date: Tue, 04 Nov 2014 13:37:19 +0100
Message-ID: <5458C87F.80409@linutronix.de>
References: <1414408111-2631-1-git-send-email-vigneshr@ti.com> <544E821D.5040004@linutronix.de> <912A29987EAE174BA6CF187D7CDFA9CE26F46B2B@DLEE08.ent.ti.com> <54577258.9080508@linutronix.de> <5458BC0B.1040803@ti.com>
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To: Vignesh R <vigneshr-l0cyMroinI0@public.gmane.org>, "Griffis, Brad" <bgriffis-l0cyMroinI0@public.gmane.org>, Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>, Pawel Moll <pawel.moll-5wv7dgnIgG8@public.gmane.org>, Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>, Ian Campbell <ijc+devicetree-KcIKpvwj1kUDXYZnReoRVg@public.gmane.org>, Kumar Gala <galak-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>, Benoit Cousson <bcousson-rdvid1DuHRBWk0Htik3J/w@public.gmane.org>, Tony Lindgren <tony-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org>, Russell King <linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org>, Jonathan Cameron <jic23-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>, Dmitry Torokhov <dmitry.torokhov-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: Hartmut Knaack <knaack.h-Mmb7MZpHnFY@public.gmane.org>, Lars-Peter Clausen <lars-Qo5EllUWu/uELgA04lAiVw@public.gmane.org>, Peter Meerwald <pmeerw-jW+XmwGofnusTnJN9+BGXg@public.gmane.org>, Samuel Ortiz <sameo-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>, Lee Jones <lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>, "Balbi, Felipe" <balbi-l0cyMroinI0@public.gmane.org>, Jan Kardell <jan.kardell-KSZdJiTw9mzQT0dZR+AlfA@public.gmane.org>, Paul Gortmaker <paul.gortmaker-CWA4WttNNZF54TAoqtyWWQ@public.gmane.org>, "devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" <devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, "linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, "linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" <linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, "linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org" <linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>, "linux-iio-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" <linux-iio-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, "linux-input-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" <linux-input-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
List-Id: linux-input@vger.kernel.org

On 11/04/2014 12:44 PM, Vignesh R wrote:

> I ran following commands
> $ evtest /dev/input/touchscreen0 &
> (with heavy item on touchscreen)
>  and
> $ cat /sys/bus/iio/devices/iio\:device0/scan_elements/in_voltage4_en
> (in a busy loop)
> I tried above experiment on my board but I didn't hit any problem even
> after running for close to 30 minutes. I was unable to reproduce failure

Just to make sure: You had the touchscreen and iio command running in
parallel and you saw evtest output while there was iio operation?

> The problem may be in configuring correct charge-delay value. Please run:
> $ ts_test > /dev/null
> and let me know if pen events are being detected properly.

Well I get the touch events but not while busy loop on iio interface is
running (I get maybe one event every 5 seconds or so).
After all, it is the same HW you have.

Sebastian
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