HDMI not working on RockPro64

[acostach]

Tested on balenaOS 2.94.5+rev2

There's no framebuffer available and X11 app shows no output on HDMI:

'
STARTING X
hostname: No address associated with hostname
xauth: (stdin):1:  bad display name "d74d9fc:0" in "add" command


X.Org X Server 1.19.2
Release Date: 2017-03-02
X Protocol Version 11, Revision 0
Build Operating System: Linux 5.10.0-10-arm64 aarch64 Debian
Current Operating System: Linux d74d9fc 5.10.66-rockchip-standard #1 SMP Sat Jan 8 10:24:03 UTC 2022 aarch64
Kernel command line: console=tty1 console=ttyS2,1500000n8 rw root=UUID=ba1eadef-a285-4717-a34a-fe996e29efc0 rootfstype=ext4 rootwait
Build Date: 29 December 2021  06:03:46PM
xorg-server 2:1.19.2-1+deb9u9 (https://www.debian.org/support) 
Current version of pixman: 0.34.0
        Before reporting problems, check http://wiki.x.org
        to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
        (++) from command line, (!!) notice, (II) informational,
        (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Mon Oct 17 09:15:39 2022
(==) Using system config directory "/usr/share/X11/xorg.conf.d"
(EE) 
Fatal server error:
(EE) no screens found(EE) 
(EE) 
Please consult the The X.Org Foundation support 
         at http://wiki.x.org
 for help. 
(EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
(EE) 
(EE) Server terminated with error (1). Closing log file.

[acostach]

Also present on v2.105.2