Description
In a usecase where the layer of the overlay has to be disabled, the layerEnable should be set to FALSE and then the CSL API CSL_dssOverlaySetLayerConfig() should be called to set the same on the HW.

Resolution
When the set layer params IOCTL is called with layer num as INVALID_LAYER, the layer is disabled.

Root Cause
Pipe layer could not have been disabled, once enabled as logic for same was absent.