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TDA4VM: SGMII de-emphasis register

Part Number: TDA4VM

What register can change sgmii de-emphasis? 

In Keystone sprugv9d.pdf you can change it with SGMII_SERDES_CFGTX. A similarly named CPSW_SGMII_TX_CFG_REG on tda4 doesn't seem to affect the signal when at 0 or 0xffffffff.

We are seeing rx crc errors when sgmii is running in 100m mode but don't see any when at 1000m mode. After doing MR_AN_RESTART around 10 times the crc errors go away. The eye diagram for phy to j7 looks good but doesn't from j7 output to phy.