[PATCH 0/4] Touchscreen performance related fixes

Sebastian Andrzej Siewior bigeasy at linutronix.de
Tue Nov 4 04:37:19 PST 2014

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.


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