The VPSS in the scaler only mode has two resets. One of them can be driven from an external source which resets the complete VPSS. The other reset is internal to the VPSS subsystem in the scaler only mode and can be controlled by programming the GPIO. The internal reset controls the resetting of vscaler, hscaler, stream FIFOs, and the outgoing aresetn_io_axis pin.
For more information, see AXI GPIO LogiCORE IP Product Guide (PG144) [Ref 11] .