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    SubjectRe: [PATCH 0/4] Touchscreen performance related fixes


    On Tuesday 04 November 2014 06:07 PM, Sebastian Andrzej Siewior wrote:
    > 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?
    >

    Yeah.. I see both evtest and IIO outputs. Touch events are received
    consistently (decent samples per second) and atleast one IIO output per
    second.
    Here is a part from console log
    ---------------------------
    928
    Event: time 1413204484.240114, type 3 (Absolute), code 0 (X), value 1746
    Event: time 1413204484.240114, type 3 (Absolute), code 1 (Y), value 1720
    Event: time 1413204484.240114, type 3 (Absolute), code 24 (Pressure),
    value 99
    Event: time 1413204484.240114, -------------- Report Sync ------------
    Event: time 1413204484.255318, type 1 (Key), code 330 (Touch), value 0
    Event: time 1413204484.255318, type 3 (Absolute), code 24 (Pressure),
    value 0
    Event: time 1413204484.255318, -------------- Report Sync ------------
    933
    Event: time 1413204484.273599, type 3 (Absolute), code 1 (Y), value 1718
    Event: time 1413204484.273599, type 3 (Absolute), code 24 (Pressure),
    value 99
    Event: time 1413204484.273599, type 1 (Key), code 330 (Touch), value 1
    Event: time 1413204484.273599, -------------- Report Sync ------------
    Event: time 1413204484.290195, type 3 (Absolute), code 24 (Pressure),
    value 98
    Event: time 1413204484.290195, -------------- Report Sync ------------
    Event: time 1413204484.306783, type 3 (Absolute), code 1 (Y), value 1719
    Event: time 1413204484.306783, -------------- Report Sync ------------
    946
    Event: time 1413204484.322164, type 1 (Key), code 330 (Touch), value 0
    Event: time 1413204484.322164, type 3 (Absolute), code 24 (Pressure),
    value 0
    Event: time 1413204484.322164, -------------- Report Sync ------------
    Event: time 1413204484.340435, type 3 (Absolute), code 1 (Y), value 1721
    Event: time 1413204484.340435, type 3 (Absolute), code 24 (Pressure),
    value 98
    Event: time 1413204484.340435, type 1 (Key), code 330 (Touch), value 1
    Event: time 1413204484.340435, -------------- Report Sync ------------
    Event: time 1413204484.357025, type 3 (Absolute), code 0 (X), value 1745
    Event: time 1413204484.357025, type 3 (Absolute), code 24 (Pressure),
    value 97
    Event: time 1413204484.357025, -------------- Report Sync ------------
    Event: time 1413204484.373621, type 3 (Absolute), code 0 (X), value 1746
    Event: time 1413204484.373621, type 3 (Absolute), code 1 (Y), value 1720
    Event: time 1413204484.373621, -------------- Report Sync ------------
    942

    ---------------------------
    The numbers 928, 933 etc are from oneshot ADC read. The above output is
    pretty consistent over time.

    >> 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.

    Yeah.. I believe HW is same. I am using rev 1.5B with
    omap2plus_defconfig (+ TSC/ADC enabled)

    Regards
    Vignesh
    >
    > Sebastian
    > --
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