HD3SS3212-Q1: query for the usage of HD3SS3212-Q1 w/ PCIe

Hi TI,

I wanna use HD3SS3212 with PCIe interface. (like fig 13 in datashee) 

when I use two PCIe interfaces in HD3SS3212, what is the lane number that I can configure for PCIe lane, 1 lane only ? 

is there any application example ? 

Thanks