I have been working to get the CSI camera adapter working with L4.9.88_2.0.0 (stock image). When going into u-boot it could not find fsl-imx8mq-evk-mipi-csi2.dtb. It is not installed in the stock image.
I found in the Linux Binary Demo Images - i.MX 8MQuad EVK folder several .dtb files one if which included Image-fsl-imx8mq-evk-mipi-csi2.dtb. I copied this to the same directly I found he default dtb file ( /run/media/mmcblk0p1 ). Once this was installed I was able to set in u-boot to this dtb and ran fine into Linux.
However, when running the gstreamer command provided in the documentation it is unable to open the pipeline. I get the following error:
WARNING: erroneous pipeline: no element "v412src"
Any feedback would be appreciated. It is plugged into J1502 as instructed.