DP83867IS: How to set PHY registers when using AC coupled capactiors instead of transformers for MDI interface

Hi, we are using TI Enet PHY chip DP83867ISRGZ (SGMII to MDI) for PHY2 & PHY3.
For MDI interface of PHY3, we use AC coupled capactiors instead of transformers, is there any difference need to note to set PHY registers for below 2 scenarios (PHY2 & PHY3)? And How to? Thanks a lot!
1) PHY2, MDI connected with transformer;
2) PHY3, MDI connected with AC coupled capactiors;