Ver 20210517 kernel 5.10.37
ArmbianTV er 20210608 kernel 5.10.42 and 5.12.9 Please note that the kernel config has changed significantly.
Libreelec kernel 5.10.42
new version of Armbian and Libreelec 20210614 with core 5.10.43.
Added support for analog audio and a standard remote control.
To switch to analog sound on LE, after selecting the device in the settings, you need to restart the system to turn on the sound.
Ver 20210621 Armbian and Libreelec
fixed analog sound and remote control
Does this board use the same rt5640 audio codec as Firefly-RK3399? If yes, is there any publicly available patch which can enable onboard sound on Firefly-RK3399 with mainline kernel?
The P1 uses a different 8388 chip (it now works with the main core). There is a driver for the 5640, but I did not check its operation. May need additional patches or settings.
The ArmbianTV and Libreelec version is 20210703.
Kernel 5.10.47 and 5.12.14.
Fixed the installation of the media package for the Buster-legacy version (kernel 4.4).
ver 20210721 kernel 5.10.52 \ 5.12.19
The first test version of AltLinux images (Russian Linux) for Firefly Station P1 is available. 
https://en.altlinux.org/Main_Page
Starting the system is similar to starting Armbian\LE. Download the image, unpack it, burn it to a medium SD \ USB, connect it to P1 and turn on the power. At the first start, you need to perform several steps to configure the system.
ver 20210816 kernel 5.10.59
LE ver 20210906 kernel 5.14
ArmbianTV ver 20210907 kernel 5.10.62