I have a 4G Rev 2 Rock64 that is running like a champ on current - 5.4.2 as of this writing, as far as USB and Ethernet are concerned. I did have to blacklist UAS for all my USB drives, and now the board is rock solid even with heavy disk and network IO.
I do have one problem though, I have no sound. I have the following loaded (automatically):
root@chdock:/home/sugata# cat /proc/modules |grep snd
snd_soc_rk3328 16384 0 - Live 0xffff800008dc9000
And yet, I get this:
root@chdock:/home/sugata# aplay -l
aplay: device_list:272: no soundcards found...
I searched around this forum and nothing obvious came up. Any ideas?