DS90UB964-Q1: How can I read DS90UB913A-Q1 registers from DS90UB964-Q1 according FDLINK III? what are the full Initialization steps for DS90UB964-Q1?

Now we can read and write the registers of the ds90ub964 through I2C.
Question:
In our design,we use DS90UB964-Q1 in our board ,and DS90UB913A-Q1 in camera,  I configure the ds90ub964 based on the "1.10.10.1 Initialization" in Page 22 of 《DS90UB96X-Q1EVM User's Guide--Literature Number: SNLU177 July 2016》,the only difference is that the 0x6D register is set in the STP mode instead of the COAX mode（Because we're using the STP）.After I configure the ds90ub964 as above,the 0x5B register was supposed to contain the Remote Serializer ID, but when I read the 0x5B register, I can not get the Remote Serializer ID,that is to say, ds90ub964 can not match with Remote Serializer.

I want to know  that if I configure the ds90ub964 according to User's Guide in Page 22 step by step, is it enough to completely configure  the ds90ub964 so that I can read the Camera ID and other informations?

If not, what other registers should I  configure? thanks