DS90UB954-Q1: Enabling self trigger for AR0233

Hello,

First question======

We are using serial (MIPI) MARS camera (AR0233 -> TI953) and we are receiving at our board using TI954 and TI954 interface FPGA using MIPI.

So far, we are able to 

1. Enable pattern generation at TI954 and receive at FPGA

2. Access back channel I2C at TI954 and read from TI953.

So, interface between camera and TI954 looks OK and interface between TI954 and FPGA looks OK.

I think trigger has some issue at TI954. We connected trigger signal to TI954 GPIO0 and GPIO1. (2 cameras to TI954)

My question is how to enable self trigger at camera using I2C access to TI954 (back channel to camera) and receive frames at FPGA.

Could any of you can give me register sequence to try this ?

Second question======

If we use parallel MARS, we cannot access 913 serializer using TI954 back channel. I don't understand what is the difference and what I am missing.

Any suggestions ?

Thanks !