We are currently implementing a graph review mode for our product which includes two cursors- similar to an oscilloscope. The problem we are having is that we are not able to move the cursor during a continuous pen down event. The cursor moves to the new position only after a pen-up event. The cause of this problem is that the screen is freezing during pen down (not updating until pen up event). We noticed that if the system goes into suspend state and back to On state, this problem disappear. The screen updates during pen down event.
What could be the cause of this problem? We are using the DA9053 PMIC.