maka

With ddr4 the best is 1506mhz

Yes, DMC is deprecated.

I quess this is an android boot so the kernel is 4.19 and ddr frequency is stored in DTB file. So don't care about freq. With kernel 5.x the frequency is given by the bootloader and then you must pay atention.

So you want to link your box to the printer with ethernet and give the printer wifi? This is easy with a wifi-repeater-bridge but you want your box to do that. If you can give the printer an static IP and gateway I think you can do. Just asiggn static IPs to all the adapters within your router's IP. For exemple: Router IP 192.168.1.1 Printer IP 192.168.1.50 Printer Gateway 192.168.1.52 Box IP 192.168.1.51 Box Gateway 192.168.1.52 Wifi IP 192.168.1.52 Also you can bridge adapters like this https://www.baeldung.com/linux/bridging-network-interfaces

Good job Maybe the attached file is better for your build. ¿How do tou get the log? quartz64_defconfig

But eth0 is working, isn't it?

IO voltages to the trash can, RTL will provide .... rk3566-box-demo_rboxr2_8.dtb

Another idea Change gmac1 to gmac0 in pinctrl-0 rk3566-box-demo_rboxr2_7.dtb

i made a change from "host" to "otg" in the first usb node, maybe fails because of that. Anyway, ethernet should be ok and have no more ideas. Can you check if rtl8211f is in the box?

I have realized that was using an rboxr2 dts that is diferent from yours because I had a previous file and was opening the wrong one. Because of this there is a voltage error that have mended. The usb nodes are different as well but havent changed anything because is causing fatal error. You can play with usb nodes if you want to. I think this file should work with the right voltage but the "final" word is just a hope. PD 4f-2d is the right timing. rk3566-box-demo_rboxr2_final.dtb

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

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

You should have It in the rockchip DTB directory. I think dont understand yor current situation.

Better tell me about rk3566-box-demo.dtb

I think box-demo dtb should work

What if you try with sdcard and usb simultaneously with the same image in both burned?

I think is like firefly roc-3566-pc . @mmie4jbcu tells he can boot with x88 pro 20, wich is similar, with box-demo but his dts is just a precompiled from kernel and this makes me hesitate. You can test with his dtb. I would use a roc-3566-pc image because the rock3a maybe patched because this sbc is a bit tricky.

if rk809 and fan regulator is enabled does not seem like box-demo

Try with x96 air DTB which is perfect for your box. Moreover is supported in Linux. You only have to know if your box is a 100M or 1000M ethernet.