PHYs for HDMI RX, DisplayPort TX

Using an Arria 10 SoC for HDMI inputs and DisplayPort outputs. We are planning to use Altera's IP cores.

Is it possible to use only 4 PHY channels, with the HDMI connected to the RX pins, and DisplayPort connected to TX pins? Or do the two protocols need to have their own separate PHY channels?

Regards,

Jason