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DP83867CS: SGMII autonegotiation after MDI link up possible?

Part Number: DP83867CS

Hello

we are using the DP83867CS PHY and would like to force the SGMII speed (between the MAC and the PHY) to the MDI resolved speed. Our purpose is to achieve the following behavior:

1. system powers up, no link on the MDI side -> no SGMII link

2. MDI side has autonegotiation enabled -> establish link link when a link partner has been connected over RJ45

3. establish SGMII link between the MAC and the PHY -> use the MDI resolved speed as SGMII speed

Is this sequence possible? If yes then which options do I need to configure in the PHY? I would like to "map" the MDI resolved speed on the SGMII link so that the MAC can be informed about the link speed of the physical connection. I do want to have autonegotiation so that the system can automatically link up when a device has been connected.

The PHY is already operational (SGMII links up as soon as the board powers up and the PHY is not in reset) so the communication between the PHY and the MAC (data interface as well as MDIO) has already been tested.

Thanks in advance.