Here you'll find the modified version of LibreElec for the r329q 3.1 board. 
This allows boot from the internal EMMC and installation from Multitool.

Based on Ilmich's excellent work:
https://forum.libreelec.tv/thread/25236-unofficial-rk3228-rk3229-box-libreelec-builds/?pageNo=1

This version includes the patch (custom uboot build + DTS patch)  allowing libreelec to boot on the EMMC.
After the reboot, remember to modify the DTB by connecting via SSH (root) and executing the program:

# rk322x-dtb-switch.sh switch rk322x-box-mxq4kpro_r329q

patched source available on  : https://github.com/PoC-ng/LibreELEC.tv-rk322x-poc/tree/r329q-3.1  (MR is open to Ilmich project)


WIFI : OK
Ethernet : OK
Stability : OK