QopenglWidget paintgl issue on imx6

[satyanarayana]

I am new to Qt and below is Qt sample code which we are using with QopenglWidget as base class
void updatebuf()
{
update();
}
void paintGL()
{
/// opengl paint calls..
}
Call from update to paintgl is getting delayed when ever some activity happens on display. So i was wondering if it possible to call paintgl directly and use it for drawing opengl display calls to compensate for delay from update to paintGL.

Please do let me know your thoughts on this.....