在MPSoC ZCU106單板的HDMI-Tx上基於eglfs_kms的執行QT應用程式

按照在MPSoC上執行基於eglfs_kms的QT應用程式, 可以在MPSoC ZCU106單板的DP上基於eglfs_kms的執行QT應用程式。按照在VCUTRD 2020.1 裡設定HDMI-TX顯示QT介面, 可以在MPSoC ZCU106單板的HDMI-Tx上基於X11的執行QT應用程式。在HDMI-Tx上，基於eglfs_kms的執行QT應用程式，遇到了下列兩個錯誤。

錯誤1

QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/var/volatile/tmp/runtime-root'
Setting framebuffer size is only available with DRM atomic API
Attribute Qt::AA_ShareOpenGLContexts must be set before QCoreApplication is created.
Could not queue DRM page flip on screen HDMI1 (Invalid argument)
Could not queue DRM page flip on screen HDMI1 (Invalid argument)
 

錯誤2

QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/var/volatile/tmp/runtime-root'
Framebuffer size format is invalid.
Attribute Qt::AA_ShareOpenGLContexts must be set before QCoreApplication is created.
Failed to commit atomic request (code=-22)

基於在VCUTRD 2020.1 裡設定HDMI-TX顯示QT介面做更改後，執行下列命令，可以在MPSoC ZCU106單板的DP上基於eglfs_kms的執行QT應用程式。其中的$display_device和$connector_id，需要根據單板更改。display_device一般是類似a0070000.v_mix的格式，可以通過“dmesg | grep v_mix”查到。$connector_id，可以在“modetest -D $display_device”的輸出裡查詢， 也可以根據

update-alternatives --install /usr/lib/libMali.so.9.0 libmali /usr/lib/wayland/libMali.so.9.0 90

echo Y > /sys/module/xlnx_mixer/parameters/mixer_primary_enable

modetest -D $display_device -s $connector_id:1920x1080-60@AR24

killall Xorg
cat /run/kms.conf

export QT_QPA_PLATFORM="eglfs"
export QT_QPA_EGLFS_KMS_ATOMIC=1
export QT_QPA_EGLFS_INTEGRATION="eglfs_kms"
export QT_QPA_EGLFS_KMS_CONFIG="/run/kms.conf"
export QT_QPA_EGLFS_DEBUG="1"
export QT_QPA_EGLFS_FORCE888=1

# chmod +x /run/qt5everywheredemo-1.0/QtDemo
# /run/qt5everywheredemo-1.0/QtDemo

ls -l /usr/share/examples/opengl/
/usr/share/examples/opengl/cube/cube
/usr/share/examples/opengl/textures/textures
 

如果執行失敗，有時執行“ctrl+c”還不能退出QT應用程式cube和textures，還需要執行命令“kill -9 ”, 或者“killall -9 cube”，才能讓其退出。

上述的/run/kms.conf內容如下:

{
  "device": "/dev/dri/card1",
  "hwcursor": false,
  "pbuffers": true,
  "outputs": [
    {
      "name": "HDMI",
      "mode": "1920x1080"
    }
  ]
}