If you want your device to be faster - try to use the device tree from v884k - the ddr timings are the same:
Insert the SD-Card in your computer open the LIBREELEC partion/device. Extract "SYSTEM" from LIBREELEC paration (using unsquashfs on linux or 7zip on windows) go to /usr/share/bootloader - you will there find rk3229-box-v884k.dtb - copy this file to "LIBREELEC". Edit extlinux/extlinux.conf and replace "rk3228b-box-v88mars-II.dtb" with that new filename.
Never heared of "S9012P" wifi - there is no driver available in RK kernel.
Hello!
First of all, thank you so much for this job.
I tried to change the .dtb to improve performance but had no results.
I have the device MXQ Pro 4k (rk3229) with 2GB RAM and 16GB ROM.
What can I do to improve performance?
Thank you!!! 
