want to config it:
pcie1 use 2.5G. pcie2 use 5G, do it support that?
Yes, it supports.
Can you describe how to configure it
thanks
For the SerDes 2 protocol 0x5577 when SRDS_DIV_PEX_S2=00 each of PCie1, PCIe2 and PCIe3 can independently operate at 2.5G, 5G and 8G.