Are you able to use the video_test program under /opt/imx8-isp/bin to see if you can get raw video (I tested this by saving the raw video to a file as the DRM or display buffer methods could not use it as a source).
Are you able to use the video_test program under /opt/imx8-isp/bin to see if you can get raw video (I tested this by saving the raw video to a file as the DRM or display buffer methods could not use it as a source).