DmitryS

@DmitryS There is no opensource OpenCL driver in mesa, what you want to use is the closed source binary.
The closed source binary requires the closed source drivers; it can be installed and probably brought into working state, but it is a real PITA  since it requires the proprietary mali kernel driver first, then the closed source blobs and finally the closed source OpenCL driver. I hope I scared you enough, because that way is very scary by itself.
 
Just a side consideration: people, in general, should be very thankful for opensource drivers that make things work out of the box  and should heavily blame companies that put obstacles - like ARM does.

Thanks for the explanation. I finally unbricked it. What I figured out is that I should put a sd-card. I put it into the board, shortened contacts which MattWestB helped me to find and it booted into multitool where I choose to burn another image and now it boots into it from emmc! Thank you guys!

Thanks for the explanation. I finally unbricked it. What I figured out is that I should put a sd-card. I put it into the board, shortened contacts which MattWestB helped me to find and it booted into multitool where I choose to burn another image and now it boots into it from emmc! Thank you guys!

@DmitryS The MCC is U2300 and on the underside of the PCB you have 2 test points TP2300 and TP2301 (GND).
You can trying shutting them with one high ohm resistor for being safe (or only some metal if not playing safe and can damage the board) and putting in one USB cable from your PC in the OTG port and see if the SOC is booting in masc rom more.
 
Some of the hardware specialist here is knowing more but im 95% sure its the masc rom TPs on your board but no one can grantee it before have testing it and its all on your own risk !!
 
Its also looks you is having one unpopulated pin row for console that can being good if need doing more debug (after getting your board booting OK).

I would say this problem is common with the s905x2 and s905x3 boxes.  I have this issue on my boxes as well.  I don't know of anyone that has tracked down the root cause.