I2C question for using 3x 4-lane CSI

hello, we will use 3x 4-lane CSI on our project
each 4-lane CSI connect to a camera hub
so we will totally need 3 set CAM_I2C.
but the question is that there is only 1 set CAM_I2C on TX2
so we can use other I2C or any suggestion?

thanks~

You can have i2c mux on your sensor board like e3333.