I do not have a device tree for the trn9 box on mainline kernel currently, only roc-cc, rock64 and rockbox, I will try to add the missing ones before I create a new mainline testing thread and post all linux v5.1 images (later today).
Tried latest build, trn9 box booted but I got neither ethernot nor wifi, pvr.hts, tvheadend and oscam didn't work also.
So I coudn't test anything and rolled back to latest kernel 4.4 nightly where I'm experiencing crashes all the time.
Very frustrating.