Fresh news. If I modify the device tree to force only one CSI lane, 720p works. As such I’m pretty sure the problem is actually in the number of lanes the CSI controller expects data to come through. If the device tree is configured with 2, then it won’t work with video streams that only use 1. I can see that a similar problem has been raised in this thread here CSI2 debug messages don't seem to be working - #11 by ShaneCCC , was there any conclusion?
Also, I can see that one of your colleagues said that the trace feature doesn’t work on Nano, what’s the approach to get debug data out of the vi driver?
[ 496.446293] vi 54080000.vi: tegra_channel_error_status:error 4000 frame 0
[ 496.462955] vi 54080000.vi: tegra_channel_error_status:error 4000 frame 1
[ 496.479664] vi 54080000.vi: tegra_channel_error_status:error 4000 frame 2