Touchscreen failure with CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND

[Adam Ford]

On Tue, Apr 25, 2017 at 10:24 AM, Fabio Estevam <festevam at gmail.com> wrote:
> On Tue, Apr 25, 2017 at 11:35 AM, Adam Ford <aford173 at gmail.com> wrote:
>
>> I have a touch screen (using tsc2004 touch controller) on my board.  I
>> can run some tests if you tell me how you're able to reproduce your
>> issue.  I can at least confirm whether or not I see it too.  I won't
>> be able to do it until later tonight or tomorrow however.
>
> Just run:
>
> evtest /dev/input/eventX to capture the touchscreen events and keep
> touching the screen.
>

Using my board set to ondemand (and I verified frequency)
# cat /sys/devices/system/cpu/cpufreq/policy0/scaling_cur_freq
396000

I ran it for 3 hours and it and continued to show results.

Event: time 71379.065289, type 1 (EV_KEY), code 330 (BTN_TOUCH), value
1
Event: time 71379.065289, -------------- SYN_REPORT ------------
Event: time 71379.117399, type 3 (EV_ABS), code 24 (ABS_PRESSURE),
value 0
Event: time 71379.117399, type 1 (EV_KEY), code 330 (BTN_TOUCH), value
0
Event: time 71379.117399, -------------- SYN_REPORT ------------
Event: time 83122.438637, type 3 (EV_ABS), code 0 (ABS_X), value 2144
Event: time 83122.438637, type 3 (EV_ABS), code 1 (ABS_Y), value 1186
Event: time 83122.438637, type 3 (EV_ABS), code 24 (ABS_PRESSURE),
value 567
Event: time 83122.438637, type 1 (EV_KEY), code 330 (BTN_TOUCH), value
1
Event: time 83122.438637, -------------- SYN_REPORT ------------


adam

> After some random time (1-2 minutes) evtest will stop capturing the events.
>
> Thanks