SK-TDA4VM: imx390 capture images failed with ds90ub960 and ds90ub953

Hi.

we use  ds90ub960 and ds90ub953 and imx390 to capture images in sk-TDA4VM with SDK8.6 （tisdk-edgeai-image-j7-evm.wic）

It seems that all devices are probed succesful.

when we use "media-ctl -p":

and then,we try to  capture images using gstreamer.

gst-launch-1.0 \
v4l2src device=/dev/video2 io-mode=dmabuf-import ! \
video/x-bayer, width=1936, height=1100, format=rggb12 ! \
tiovx sink_0::device=/dev/v4l-subdev4 sensor-name=SENSOR_SONY_IMX390_UB953_D3 \
dcc-isp-file=/opt/imaging/imx390/dcc_viss_wdr.bin \
sink_0::dcc-2a-file=/opt/imaging/imx390/dcc_2a_wdr.bin  format-msb=11 ! \
video/x-raw,format=NV12, width=1936, height=1100 ! filesink location=./imx390.yuv

and the programe finished whth nothing happened.

we want to verify 2 questions:

1、How to confirm if the deserializer has a video signal from the lock camera?

2、How do we determine if it's a sensor chip issue or a deserializer configuration issue?

thanks！