I just wanted to let you know that RidgeRun added support to use the IMX219 and ov5647 cameras with tegra X1 including ISP support We have tested multiple cameras (up to 6) at the same time using the J20 board from auvidea. Our first approach included the support to capture bayer using v4l2src. Once the V4L2 drivers were working RidgeRun added support to use the cameras with the ISP, this means that we can also capture using nvcamerasrc and therefore do the bayer to YUV conversion in the Tegra ISP. You can find more information including gstreamer pipelines in our wiki page:
We will be working to support more sensors. If you need support for a new sensor please feel free to contact us.
This is a video showing 6 camera capture with OV5647: