On Sun, 29 Mar 2026 at 13:59, Tamás Szabó <[email protected]> wrote: > > Hello, > > > I read there is possible to use HDMI as console output on rk3399, but I > do not find any documentation about this, only Google AI give some > hints, but mostly mix up rockchip and sunxi stuff. > > I have a Giada DN74 which is based on rk3399 but I am not able to enable > HDMI output in u-boot. > > I check in which defconfig is use necessary configs (|example: > CONFIG_VIDEO_ROCKCHIP|) and which one is similar to my board, I choose > nanopi-m4-rk3399_defconfig and build u-boot but no output. > > > Is the HDMI output in some rk3399 board enabled by default?
It works on a number of devices I have tested it on, eg rockpro64 and Rock960. > There is documentation about HDMI output in u-boot? Not particularly I am aware of. > If not documentation, someone could please write a sort advise how to > enable HDMI output. Check what other devices are using, rockpro64, rock960 and likely a bunch of others.
