How to specify the output windows to multi screen display respectively on the imx8mp evk board

[charleshuang]

Hi NXP teams,

We run the attached Multi_Screen_Display APP on the imx8mp evk board with dual display(HDMI+DSI to HDMI). The imx8mp evk BSP is Linux 5.4.70-2.3.0.

We expect It can open two QT windows and display them on the HDMI screen and the DSI to HDMI screen respectively. But the two QT windows can only be displayed on HDMI screen or DSI to HDMI screen at a time now.

How to specify a output window to HDMI display screen and another window to DSI to HDMI display screen at a time on the imx8mp evk board? Thanks.

[Zhiming_Liu]

Do you use correct qt api?

QDialog dlg = new QDialog(this);
QDesktopWidget* desktop = QApplication::desktop();
this->setGeometry(desktop->screenGeometry(0));   
dlg->setGeometry(desktop->screenGeometry(1));

[charleshuang]

Hi @Zhiming_Liu 

Yes, we also use correct qt api, but this problem still exists. Thanks.