hi , i try it with this scenario, it work.
test code:
ov1 = Overlay(‘/home/xilinx/haddsub/prio.bit’)
pr=ov1.pr_decoupler_0
pr.write(0x0, 0) ← default set to zero
// before download partial bitstream set to one
pr.write(0x0, 1)
add_pb=Bitstream(‘/home/xilinx/haddsub/pr_0_sub.bit’, None, True)
add_pb.download()
// after download
pr.write(0x0, 0)
…