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how to use to implement overlay in hardware imx6dl

Question asked by wang ds on Oct 19, 2017
Latest reply on Oct 19, 2017 by igorpadykov

Now I used imx6Dual. Fb0 is available at present, and FB1 is not specified. At present, it is hoped to implement overlay on the screen. A bottom layer is used to display the video stream information from camera through device node , and an upper layer displays the normal interface in QT.What should I do?