When DSS_M2M node is added in the single camera application, app hangs. This is done right before the display node in order to check if there is any issue during scaling.
Found that with the help of DSS_M2M, Downscaling can be done to 1920x540 from input 1920x1080.
Any scaling below this resolution (eg. 1920 x 520, 1920 x 384 etc) results in a hang in the graph.