Ask ADV7842 to clarify the problem of input, register can not write what happened

How do you do:

At present, it is found that the PAL system image of CVBS ADV7842 is black and white, other interfaces are normal, and no problems are found in hardware inspection. Software Check Discovery

The whole 90 sets of registers are not working, the input parameters are invalid, and the read-out is 0xff.

All other registers are available.

Let's see where the hardware is. We have done other boards without this problem. That's the strange problem with the new hardware.

Please answer, thank you!