Hi Laurent, Thanks for your comments. On Mon, Jan 4, 2021 at 3:05 AM Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> wrote: > That's not right, csi->is_csi2 is a flag that indicates if the current > input to the CSI comes from the CSI-2 receiver. > > It looks like the i.MX6ULL is missing the MIPI CSI-2 receiver and thus > also the corresponding video mux. The WARN_ON() should thus indeed by > bypassed, but only for devices that don't have the video mux. I wouldn't Unlike i.MX7, i.MX6UL/i.MX6ULL do not have a MIPI CSI-2 IP block. They only have a parallel CSI interface, and no video mux is present. So the csi->is_csi2 check I did seems correct, right? > be surprised if other adaptations would be needed in the code. Yes, I found other paths that miss the csi->is_csi2 check too. Thanks, Fabio Estevam