TUSB7340: Disable one Downstream, it is necessary EEPROM?

I have followed this thread:

TUSB7340: PCIe differential signals - "P" and "N" swapping (polarity inversion) - Interface forum - Interface - TI E2E support forums

And I have 2 questions, I have read that If you want to disable one Port you have to set the PORTx_DIS bit(s), It means you need to implement an EEPROM, right?

Other question, Why the thread creator use TPSR2084SLR, MPM3811GGZ and ADR1706ACPZ instead use TPS74401RGWT like on your Design Guide of TUSB7X20?

Thank you so much.