PhyR and G.INP and the same kind of thing, both re-transmission schemes, but G.INP is not PhyR. G.INP is an amalgamation of two different vendor's retransmission schemes, one of theme presumably being Broadcom PhyR, so that they can interoperate with each other, with the equipment at either end not even having to know exactly how the other end's retransmission is implemented, so long as they follow the G.INP technical recommendation.
xdslctl has two separate switches, xdslctl configure --phyReXmt <0xBitMap-UsDs> and --Ginp <0xBitMap-UsDs>.