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tslib vs. evdevtouch

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  • B Offline
    B Offline
    BradWalker
    wrote on last edited by
    #1

    I have a problem getting my very simple Qt test app working with an eGalax touchscreen.

    I am able to see & use the device via evtest.

    root@petalinux:/tmp# evtest
No device specified, trying to scan all of /dev/input/event*
Available devices:
/dev/input/event0:      eGalax Inc. USB TouchController Pen
/dev/input/event1:      eGalax Inc. USB TouchController
Select the device event number [0-1]: 
root@petalinux:/tmp#

    Yet, when I start my app I get no touch events..

    Here is what the debug output from my Qt test app show. It has been edited for brevity.

    
root@petalinux:/tmp#
root@petalinux:/tmp#
root@petalinux:/tmp#
root@petalinux:/tmp#
root@petalinux:/tmp#
root@petalinux:/tmp# /tmp/qt-test-app
QFactoryLoader::QFactoryLoader() checking directory path "/usr/lib/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/plugins/platforms/libqlinuxfb.so"
Found metadata in lib /usr/lib/plugins/platforms/libqlinuxfb.so, metadata=

<stuff deleted>

Got keys from plugin meta data ("linuxfb")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/plugins/platforms/libqminimal.so"
Found metadata in lib /usr/lib/plugins/platforms/libqminimal.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "minimal"
        ]
    },
    "className": "QMinimalIntegrationPlugin",
    "debug": false,
    "version": 329219
}


Got keys from plugin meta data ("minimal")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/plugins/platforms/libqoffscreen.so"
Found metadata in lib /usr/lib/plugins/platforms/libqoffscreen.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "offscreen"
        ]
    },
    "className": "QOffscreenIntegrationPlugin",
    "debug": false,
    "version": 329219
}

Got keys from plugin meta data ("offscreen")
QFactoryLoader::QFactoryLoader() checking directory path "/usr/lib/plugins" ...
QFactoryLoader::QFactoryLoader() checking directory path "/var/volatile/tmp" ...
loaded library "/usr/lib/plugins/platforms/libqlinuxfb.so"
qt.qpa.input: evdevtouch: Adding device at "/dev/input/event1"
qt.qpa.input: evdevtouch: Using device /dev/input/event1
QFactoryLoader::QFactoryLoader() checking directory path "/usr/lib/plugins/platforms/generic" ...
QFactoryLoader::QFactoryLoader() checking directory path "/usr/lib/plugins/generic" ...
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/plugins/generic/libqevdevkeyboardplugin.so"
Found metadata in lib /usr/lib/plugins/generic/libqevdevkeyboardplugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QGenericPluginFactoryInterface",
    "MetaData": {
        "Keys": [
            "EvdevKeyboard"
        ]
    },
    "className": "QEvdevKeyboardPlugin",
    "debug": false,
    "version": 329219
}


Got keys from plugin meta data ("evdevkeyboard")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/plugins/generic/libqevdevmouseplugin.so"
Found metadata in lib /usr/lib/plugins/generic/libqevdevmouseplugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QGenericPluginFactoryInterface",
    "MetaData": {
        "Keys": [
            "EvdevMouse"
        ]
    },
    "className": "QEvdevMousePlugin",
    "debug": false,
    "version": 329219
}


Got keys from plugin meta data ("evdevmouse")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/plugins/generic/libqevdevtabletplugin.so"
Found metadata in lib /usr/lib/plugins/generic/libqevdevtabletplugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QGenericPluginFactoryInterface",
    "MetaData": {
        "Keys": [
            "EvdevTablet"
        ]
    },
    "className": "QEvdevTabletPlugin",
    "debug": false,
    "version": 329219
}


Got keys from plugin meta data ("evdevtablet")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/plugins/generic/libqevdevtouchplugin.so"
Found metadata in lib /usr/lib/plugins/generic/libqevdevtouchplugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QGenericPluginFactoryInterface",
    "MetaData": {
        "Keys": [
            "EvdevTouch"
        ]
    },
    "className": "QEvdevTouchScreenPlugin",
    "debug": false,
    "version": 329219
}


Got keys from plugin meta data ("evdevtouch")
QFactoryLoader::QFactoryLoader() looking at "/usr/lib/plugins/generic/libqtuiotouchplugin.so"
Found metadata in lib /usr/lib/plugins/generic/libqtuiotouchplugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QGenericPluginFactoryInterface",
    "MetaData": {
        "Keys": [
            "TuioTouch"
        ]
    },
    "className": "QTuioTouchPlugin",
    "debug": false,
    "version": 329219
}


Got keys from plugin meta data ("tuiotouch")
QFactoryLoader::QFactoryLoader() checking directory path "/var/volatile/tmp/generic" 
 ...
loaded library "/usr/lib/plugins/generic/libqevdevtouchplugin.so"
qt.qpa.input: evdevtouch: Adding device at "/dev/input/event1"
qt.qpa.input: evdevtouch: Using device /dev/input/event1
QFactoryLoader::QFactoryLoader() checking directory path "/usr/lib/plugins/platforms/styles" ...
QFactoryLoader::QFactoryLoader() checking directory path "/usr/lib/plugins/styles" ...
QFactoryLoader::QFactoryLoader() checking directory path "/var/volatile/tmp/styles" ...
qt.qpa.input: evdevtouch: /dev/input/event1: Protocol type B  (multi)
qt.qpa.input: evdevtouch: /dev/input/event1: min X: 0 max X: 4095
qt.qpa.input: evdevtouch: /dev/input/event1: min Y: 0 max Y: 4095
qt.qpa.input: evdevtouch: /dev/input/event1: min pressure: 0 max pressure: 0
qt.qpa.input: evdevtouch: /dev/input/event1: device name: eGalax Inc. USB TouchController
qt.qpa.input: evdevtouch: /dev/input/event1: Protocol type B  (multi)
qt.qpa.input: evdevtouch: /dev/input/event1: min X: 0 max X: 4095
qt.qpa.input: evdevtouch: /dev/input/event1: min Y: 0 max Y: 4095
qt.qpa.input: evdevtouch: /dev/input/event1: min pressure: 0 max pressure: 0
qt.qpa.input: evdevtouch: /dev/input/event1: device name: eGalax Inc. USB TouchController
QPainter::begin(), device=0x2d5e0, type=3
QPainter::end()
QPainter::begin(), device=0x2d5e0, type=3
QPainter::end()
QPainter::begin(), device=0x2d5e0, type=3
QPainter::setPen(), color=ffffffff

<bunch of Qt drawing primitives deleted>

QPainter::setPen(), color=ff000000, (brushStyle=1) style=1, cap=16, join=64
QPainter::end()
QPainter::begin(), device=0x254d0, type=3
QPainter::begin(), device=0x26938, type=3
qt.qpa.input: evdevtouch: Updating QInputDeviceManager device count: 1  touch devices, 0 pending handler(s)
qt.qpa.input: evdevtouch: Updating QInputDeviceManager device count: 1  touch devices, 0 pending handler(s)
QPainter::begin(), device=0x2d5e0, type=3
QPainter::end()
QPainter::begin(), device=0x2d5e0, type=3
QPainter::end()
QPainter::begin(), device=0x2d5e0, type=3
QPainter::setPen(), color=ffffffff
QPainter::drawPolyline(), count=3
QPainter::setPen(), color=ff767472
QPainter::drawPolyline(), count=3

<bunch of Qt drawing primitives deleted>

QPainter::setBrush(), color=ff101418, style=5
QPainter::setBrushOrigin(), (3.00,3.00)
QPainter::drawRects(), count=1
QPainter::drawRects(), count=1
QPainter::drawRects(), count=1
QPainter::drawRects(), count=1
QPainter::restore()
QPainter::end()
^C
root@petalinux:/tmp#

    Any ideas/suggestions are most appreciated.

    Also, is tslib preferred over evdev for Qt use? If so, why is that?

    Thanks.

    -brad w.

    1 Reply Last reply
    0
    • B BradWalker

      @SGaist

      Not a silly question at all..

      But, I'm not sure how to check without grokking through the code..

      Suggestions are appreciated.

      B Offline
      B Offline
      BradWalker
      wrote on last edited by
      #4

      @BradWalker

      Turned out my solution was to add the following options to the app when executing..

      -platform linuxfb -plugin evdevtouch

      All is finally good in my embedded Qt world.. 8-)

      1 Reply Last reply
      2
      • SGaistS Offline
        SGaistS Offline
        SGaist
        Lifetime Qt Champion
        wrote on last edited by
        #2

        Hi,

        Might be a silly question but are you sure that the plugin is using the right input device ?

        Interested in AI ? www.idiap.ch
        Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

        B 1 Reply Last reply
        1
        • SGaistS SGaist

          Hi,

          Might be a silly question but are you sure that the plugin is using the right input device ?

          B Offline
          B Offline
          BradWalker
          wrote on last edited by
          #3

          @SGaist

          Not a silly question at all..

          But, I'm not sure how to check without grokking through the code..

          Suggestions are appreciated.

          B 1 Reply Last reply
          1
          • B BradWalker

            @SGaist

            Not a silly question at all..

            But, I'm not sure how to check without grokking through the code..

            Suggestions are appreciated.

            B Offline
            B Offline
            BradWalker
            wrote on last edited by
            #4

            @BradWalker

            Turned out my solution was to add the following options to the app when executing..

            -platform linuxfb -plugin evdevtouch

            All is finally good in my embedded Qt world.. 8-)

            1 Reply Last reply
            2
            • GianlucaRenziG Offline
              GianlucaRenziG Offline
              GianlucaRenzi
              wrote on last edited by
              #5

              Hello,
              I am going crazy to find out what the hell my resistive touch screen is not working in EGLFS but works in Xorg. I suppose because the Xorg configuration is going to use evdev and its calibration value in the Xorg.conf section:

              Section "InputClass"
              Identifier "calibration"
              MatchProduct "stmpe-ts"
              Option "Calibration" "77 4007 3796 107"
              Option "SwapAxes" "0"
              Option "InvertX" "true"
              Option "InvertY" "true"
              Driver "evdev"
              EndSection

              The touchscreen is mounted upside down due to constraints on lcd frame, that's why I inverted X and Y axis.
              Nevertheless it works great with Qt and Xorg using platform xcb. But is painfully slow.
              The CPU is a SystemOnChip iMX6 Dual running @ 800Mhz with a LVDS display of 1024x600 pixels. The touchscreen is a resistive touchscreen using driver stmpe-ts over i2c bus and its registered kernel driver is /dev/input/event0.

              evtest gives me the following data:

              Input driver version is 1.0.1
              Input device ID: bus 0x18 vendor 0x0 product 0x0 version 0x0
              Input device name: "stmpe-ts"
              Supported events:
              Event type 0 (EV_SYN)
              Event type 1 (EV_KEY)
              Event code 330 (BTN_TOUCH)
              Event type 3 (EV_ABS)
              Event code 0 (ABS_X)
              Value 1561
              Min 0
              Max 4095
              Event code 1 (ABS_Y)
              Value 972
              Min 0
              Max 4095
              Event code 24 (ABS_PRESSURE)
              Value 0
              Min 0
              Max 255
              Properties:
              Testing ... (interrupt to exit)
              Event: time 1593699540.159050, type 3 (EV_ABS), code 0 (ABS_X), value 2807
              Event: time 1593699540.159050, type 3 (EV_ABS), code 1 (ABS_Y), value 1834
              Event: time 1593699540.159050, type 3 (EV_ABS), code 24 (ABS_PRESSURE), value 54
              Event: time 1593699540.159050, type 1 (EV_KEY), code 330 (BTN_TOUCH), value 1
              Event: time 1593699540.159050, -------------- SYN_REPORT ------------
              Event: time 1593699540.273889, type 3 (EV_ABS), code 24 (ABS_PRESSURE), value 0
              Event: time 1593699540.273889, type 1 (EV_KEY), code 330 (BTN_TOUCH), value 0

              So it is working for sure (in Xorg it works good).

              When using ELGFS it does not work at all.

              I am using a plain vanilla Debian Buster 10 with the official packages from Debian repositories.

              My environment variables are:
              CONSOLE="/dev/console"
              HOME="/root"
              LANG="en_US"
              LANGUAGE="en_US.UTF8"
              TZ=":Europe/Rome"
              PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
              PWD="/root/QtApp"
              QT_LOGGING_RULES="qt.qpa.*=true"
              QT_QPA_EGLFS_ALWAYS_SET_MODE="1"
              QT_QPA_EGLFS_FB_TSLIB="0"
              QT_QPA_EGLFS_INTEGRATION="eglfs_kms"
              QT_QPA_EGLFS_KMS_CONFIG="kms.json"
              QT_QPA_EGLFS_NO_LIBINPUT="1"
              QT_QPA_EGLFS_PHYSICAL_HEIGHT="88"
              QT_QPA_EGLFS_PHYSICAL_WIDTH="156"
              QT_QPA_EGLFS_TSLIB="0"
              QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS="/dev/input/event0:rotate=180"
              QT_QPA_GENERIC_PLUGINS="evdevtouch:/dev/input/event0"
              QT_QPA_PLATFORM="eglfs"
              TSLIB_CALIBFILE="/etc/pointercal"
              TSLIB_CONFFILE="/etc/ts.conf"
              TSLIB_CONSOLEDEVICE="/dev/console"
              TSLIB_FBDEVICE="/dev/fb0"
              TSLIB_PLUGINDIR="/usr/lib/arm-linux-gnueabihf/ts0"
              TSLIB_TSDEVICE="/dev/input/event0"

              I have a very basic kms JSon file too as:
              {
              "device": "/dev/dri/card1",
              "pbuffers": true,
              "hwcursor": false,
              "outputs": [
              {
              "name" : "LVDS-1",
              "mode" : "auto"
              }
              ]
              }

              When launching my QML based QtApp here is the logs:

              qt.qpa.egldeviceintegration: EGL device integration plugin keys: ("eglfs_emu", "eglfs_kms_egldevice", "eglfs_kms", "eglfs_x11")
              qt.qpa.egldeviceintegration: EGL device integration plugin keys (sorted): ("eglfs_kms", "eglfs_emu", "eglfs_kms_egldevice", "eglfs_x11")
              qt.qpa.egldeviceintegration: Trying to load device EGL integration "eglfs_kms"
              qt.qpa.eglfs.kms: Loading KMS setup from "kms.json"
              qt.qpa.eglfs.kms: Requested configuration (some settings may be ignored):
              headless: false
              hwcursor: false
              pbuffers: true
              separateScreens: false
              virtualDesktopLayout: 0
              outputs: QMap(("LVDS-1", QMap(("mode", QVariant(QString, "auto"))("name", QVariant(QString, "LVDS-1")))))
              qt.qpa.eglfs.kms: New DRM/KMS via GBM integration created
              qt.qpa.egldeviceintegration: Using EGL device integration "eglfs_kms"
              qt.qpa.eglfs.kms: platformInit: Opening DRM device
              qt.qpa.eglfs.kms: GBM: Using DRM device "/dev/dri/card1" specified in config file
              qt.qpa.eglfs.kms: Using backend-provided DRM device /dev/dri/card1
              qt.qpa.eglfs.kms: Creating GBM device for file descriptor 4 obtained from "/dev/dri/card1"
              qt.qpa.eglfs.kms: Querying EGLDisplay
              qt.qpa.eglfs.kms: Found 3 planes
              qt.qpa.eglfs.kms: plane 0: id = 28 countFormats = 34 possibleCrtcs = 0x1 supported formats = AR15 XR15 AB15 XB15 RA15 BA15 AR12 AR24 XR24 AB24 XB24 RA24 RX24 BA24 BX24 UYVY VYUY YUYV YVYU YU12 YV12 YU16 YV16 YU24 YV24 NV12 NV16 RG16 R5A8 B5A8 R8A8 B8A8 RXA8 BXA8
              qt.qpa.eglfs.kms: property 0: id = 7 name = 'type'
              qt.qpa.eglfs.kms: type is ENUM, value is 1, possible values are:
              qt.qpa.eglfs.kms: enum 0: Overlay - 0
              qt.qpa.eglfs.kms: enum 1: Primary - 1
              qt.qpa.eglfs.kms: enum 2: Cursor - 2
              qt.qpa.eglfs.kms: property 1: id = 27 name = 'IN_FORMATS'
              qt.qpa.eglfs.kms: type is BLOB
              qt.qpa.eglfs.kms: plane 1: id = 31 countFormats = 34 possibleCrtcs = 0x1 supported formats = AR15 XR15 AB15 XB15 RA15 BA15 AR12 AR24 XR24 AB24 XB24 RA24 RX24 BA24 BX24 UYVY VYUY YUYV YVYU YU12 YV12 YU16 YV16 YU24 YV24 NV12 NV16 RG16 R5A8 B5A8 R8A8 B8A8 RXA8 BXA8
              qt.qpa.eglfs.kms: property 0: id = 7 name = 'type'
              qt.qpa.eglfs.kms: type is ENUM, value is 0, possible values are:
              qt.qpa.eglfs.kms: enum 0: Overlay - 0
              qt.qpa.eglfs.kms: enum 1: Primary - 1
              qt.qpa.eglfs.kms: enum 2: Cursor - 2
              qt.qpa.eglfs.kms: property 1: id = 27 name = 'IN_FORMATS'
              qt.qpa.eglfs.kms: type is BLOB
              qt.qpa.eglfs.kms: plane 2: id = 33 countFormats = 34 possibleCrtcs = 0x2 supported formats = AR15 XR15 AB15 XB15 RA15 BA15 AR12 AR24 XR24 AB24 XB24 RA24 RX24 BA24 BX24 UYVY VYUY YUYV YVYU YU12 YV12 YU16 YV16 YU24 YV24 NV12 NV16 RG16 R5A8 B5A8 R8A8 B8A8 RXA8 BXA8
              qt.qpa.eglfs.kms: property 0: id = 7 name = 'type'
              qt.qpa.eglfs.kms: type is ENUM, value is 1, possible values are:
              qt.qpa.eglfs.kms: enum 0: Overlay - 0
              qt.qpa.eglfs.kms: enum 1: Primary - 1
              qt.qpa.eglfs.kms: enum 2: Cursor - 2
              qt.qpa.eglfs.kms: property 1: id = 27 name = 'IN_FORMATS'
              qt.qpa.eglfs.kms: type is BLOB
              qt.qpa.eglfs.kms: "LVDS1" mode count: 1 crtc index: 0 crtc id: 30
              qt.qpa.eglfs.kms: mode 0 1024 x 600 @ 57 hz
              qt.qpa.eglfs.kms: Selected mode 0 : 1024 x 600 @ 57 hz for output "LVDS1"
              qt.qpa.eglfs.kms: Physical size is QSizeF(156, 88) mm for output "LVDS1"
              qt.qpa.eglfs.kms: Output LVDS1 can use 2 planes: 28 31
              qt.qpa.eglfs.kms: Using plain OpenGL mouse cursor
              qt.qpa.eglfs.kms: No EDID data for output "LVDS1"
              qt.qpa.eglfs.kms: Sorted screen list: QVector(OrderedScreen(QPlatformScreen=0xe3e598 ("LVDS1") : 2147483647 / QPoint(0,0) / primary: false))
              qt.qpa.eglfs.kms: Adding QPlatformScreen 0xe3e598 ( "LVDS1" ) to QPA with geometry QRect(0,0 1024x600) and isPrimary= false
              qt.qpa.input: evdevkeyboard: Using device discovery
              qt.qpa.input: udev device discovery for type QFlagsQDeviceDiscovery::QDeviceType(Device_Keyboard)
              qt.qpa.input: Found matching devices ()
              qt.qpa.input: evdevmouse: Using device discovery
              qt.qpa.input: udev device discovery for type QFlagsQDeviceDiscovery::QDeviceType(Device_Mouse|Device_Touchpad)
              qt.qpa.input: Found matching devices ()
              qt.qpa.input: evdevtouch: Adding device at "/dev/input/event0"
              qt.qpa.input: evdevtouch: Using device /dev/input/event0
              qt.qpa.input: evdevtouch: /dev/input/event0: Protocol type B (mtdev) (multi), filtered=no
              qt.qpa.input: evdevtouch: /dev/input/event0: min X: 0 max X: 0
              qt.qpa.input: evdevtouch: /dev/input/event0: min Y: 0 max Y: 0
              qt.qpa.input: evdevtouch: /dev/input/event0: min pressure: 0 max pressure: 255
              qt.qpa.input: evdevtouch: /dev/input/event0: device name: stmpe-ts
              qt.qpa.input: evdevtouch: Adding device at "/dev/input/event0"
              qt.qpa.input: evdevtouch: Using device /dev/input/event0
              qt.qpa.input: evdevtouch: /dev/input/event0: Protocol type B (mtdev) (multi), filtered=no
              qt.qpa.input: evdevtouch: /dev/input/event0: min X: 0 max X: 0
              qt.qpa.input: evdevtouch: /dev/input/event0: min Y: 0 max Y: 0
              qt.qpa.input: evdevtouch: /dev/input/event0: min pressure: 0 max pressure: 255
              qt.qpa.input: evdevtouch: /dev/input/event0: device name: stmpe-ts
              ...
              qt.qpa.eglfs.kms: Creating gbm_surface for screen LVDS1
              qt.qpa.eglfs.kms: Got native format 34325258 from eglGetConfigAttrib() with return code true
              Cannot find EGLConfig, returning null config
              Cannot find EGLConfig, returning null config
              Cannot find EGLConfig, returning null config
              Cannot find EGLConfig, returning null config
              Cannot find EGLConfig, returning null config
              Cannot find EGLConfig, returning null config
              qt.qpa.eglfs.kms: Adding FB, size 1024x600, DRM format 0x34325258
              qt.qpa.eglfs.kms: Setting mode for screen LVDS1
              qt.qpa.input: evdevtouch: Updating QInputDeviceManager device count: 1 touch devices, 0 pending handler(s)
              qt.qpa.input: evdevtouch: Updating QInputDeviceManager device count: 1 touch devices, 0 pending handler(s)
              qt.qpa.eglfs.kms: Adding FB, size 1024x600, DRM format 0x34325258
              qt.qpa.eglfs.kms: Adding FB, size 1024x600, DRM format 0x34325258

              So why the evdev is looking two times for the touchscreen driver?

              Or why those lines:
              ...
              qt.qpa.input: evdevtouch: Updating QInputDeviceManager device count: 1 touch devices, 0 pending handler(s)
              qt.qpa.input: evdevtouch: Updating QInputDeviceManager device count: 1 touch devices, 0 pending handler(s)
              ...

              They look like a non good registered event handler, because of the "0 pending handler(s)"

              Or, why evdev driver gives me:
              qt.qpa.input: evdevtouch: /dev/input/event0: Protocol type B (mtdev) (multi), filtered=no
              qt.qpa.input: evdevtouch: /dev/input/event0: min X: 0 max X: 0
              qt.qpa.input: evdevtouch: /dev/input/event0: min Y: 0 max Y: 0
              qt.qpa.input: evdevtouch: /dev/input/event0: min pressure: 0 max pressure: 255

              here the evdevtouch drivers is giving me wrong max X and max Y values (both at 0), meanwhile the evtest gives me:

              Supported events:
              Event type 0 (EV_SYN)
              Event type 1 (EV_KEY)
              Event code 330 (BTN_TOUCH)
              Event type 3 (EV_ABS)
              Event code 0 (ABS_X)
              Value 2807
              Min 0
              Max 4095
              Event code 1 (ABS_Y)
              Value 1834
              Min 0
              Max 4095
              Event code 24 (ABS_PRESSURE)
              Value 0
              Min 0
              Max 255

              here the Min and Max values are 12bit wides (0-4095).

              Can you help me to workaround this so I can have my touch screen working on the EGLFS platform???

              Regards,
              Gianluca

              1 Reply Last reply
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