maka

All is correct,but you must not comment all you trials, just make efforts to solve.

@ewww Seems that you want to take the nightmare of playing with dts files. So this is your first exercise.
 
rk3566-box-demo_rboxr2_5.dtb reports that your ethernet is based in RTL8211F but doesnt work. Because we can guess that kernel identification is good, maybe the timing is wrong in 4.19 dts file.  Apply the corect timing ( TX delay RX delay) to the board.

Another phy error. Lets try twice.
rk3566-box-demo_rboxr2_6.dtb rk3566-box-demo_rboxr2_5.dtb

This could be the good one. I forgot the usb phys !
😹
rk3566-box-demo_rboxr2_4.dtb

detected but crashed
 
one by one
 
rk3566-box-demo_rboxr2_3.dtb

Just to try
rk3566-box-demo_rboxr2_2.dtb

Here you have a dtb file that could work. Has the voltages suitable for your box. even the ethernet doesnt work properly without them. Maybe usbs dont work well because I dont manage them well enough.
 
Good luck
rk3566-box-demo_rboxr2.dtb

Sorry
 
I have made a mistake better use this.
rk3566-box-demo_rboxr2.dtb

Sorry
 
I have made a mistake better use this.
rk3566-box-demo_rboxr2.dtb

Here you have a dtb file that could work. Has the voltages suitable for your box. even the ethernet doesnt work properly without them. Maybe usbs dont work well because I dont manage them well enough.
 
Good luck
rk3566-box-demo_rboxr2.dtb

I have found bulk errors in rk3566-box-demo.dtb and managed to mend the file. I attached the one for x96_x6. I just copied from other dts files :X)
 
The errors were for usb ports, cpu ang gpu. Ethernet doesn't work in my box because also fails in android and don't know if it is a broken hardware phy.
rk3566-box-demo_x96_x6.dts rk3566-box-demo_x96_x6.dtb

3566-box-demo.dts has reached 6.2 kernel. Time to fly !!!

I can confirm that rk3566 is fully supported from 6.0 The patch is from Piotr Oniszczuk. Will see a box- demo device tree in mainline kernel?
I have seen a distro kernel supporting a rk3566 TV box but this has not been reported to users.