Maybe you bought a RK3229-Device some years ago and thought: Oh what a buggy chinese grap ... and tostedt into trash ... but wait: maybe you didn't ... just look for it in the boxroom, storeroom your whereever you put stuff you 'maybe need later' ... Since current Rockchip 4.4-Kernel supports it I added support to current LE-9.2 branch - it works nice - so why not publishing it - mainline Images build against a recent 9.80 tree now available too)
Legacy Images:
Source: GitHub - knaerzche/LibreELEC.tv: Just enough OS for KODI
Images: Release RK322x-le92-d20c7bc · knaerzche/LibreELEC.tv · GitHub
Main differences to curent LE-9.2 tree:
- use of recent RK-4.4-Kernel (4.4.194)
- use of latest rkmpp
- added support for MPEG4-Hardware decoding (not sure, why it wasn't added before)
- Support for SSV6051-Wifi module
Everything that is working an RK3328-Platform is working for RK322x-platform with this builds too (except for HDR and fractional frame rates - this is not supported by the hardware)
These builds are using LE-Binary-Addons from RK3328 - so they are available too
CEC is enabled in all images but will only work if your manufacturer solderd the parts that are needed to make it work. Automatic frame-rate-switching is working, but disabled by default: You can enable it, if you are sure, you wont use any fractional-frame-rate content
Currently supported RK3229 devices:
- A95XR1 -DDR3, SSV6051 Wifi , eMMC, CEC
- D88 HDMI Stick - DDR3, RTL8723 Wifi (SDIO Package), NAND, no ethernet
- HK1 mini - DDR3, SSV6051 Wifi, NAND
- V884K - DDR3, SSV6051 wifi, NAND
- V88Mars - DDR2, SSV6051 Wifi, NAND
- HPH NT-N8 - DDR3, AP6181 wifi (SDIO Package), eMMC
- TANIX TX2, DDR3, RTL8703 Wifi (unsure, if wifi will work)
Just try any image you like you think could working ... you can't destroy anything ...but on the contrary: You can your device bring back to live, if its bricked already. As the very last resort for you should always try the V88Mars image - since it has DDR2 DRAM it has no dram-timing configuration and no frequency setting for DRAM and should therefore boot on any RK3229 device (but it will be sloooow). Main difference between the differend images are the dram-timing configuration and the wifi type: If you for example have an DDR3-Type Box with RTL8189 Wifi - try to use the image HPH NT-N8 ... since it has an SDIO-Package type wifi. (actual wifi chip will be autodetected by the driver).
If none of the obove images is working (booting) for you: You're likely to have an RK3228A or RK3228B in your box ... and you might not even now - they were often sold as RK3229 - buth they won't boot an RK3229-image since they need a different ATF/TrustOS image. Main difference between RK3228 A and RK3228B: RK3228A's CPU will run at 1,2 GHz (instead of 1,4) and GPU will run at 400 MHz (instead of 500 Mhz) .. basically any RK3228A-Image will run on both: A and B (and vice versa)
Currently supported RK3228 devices:
- V88 Mars II, DDR3, RK3228B, SSV6051 wifi, NAND
- H96 Mini H8, DDR3, RK3228A, AP6330 (SDIO Package) wifi, eMMC, CEC (This box does not have an SD Card slot - you will have to erase emmc to use it - I explained how to to this here: [unoffical] LE-9.2-Images for RK3229/RK3228)
- MK809IV HDMI Stick, RK3228B, DDR3, RTL8723 Wifi (SDIO Package), eMMC, no ethernet
- MXQ 4K Pro, RK3228A, DDR3, oviously deliverd with different wifi types - some will work, others not
- Alfawise A8, RK3228B, DDR2, SSV6051P (should/will work on other RK3228X devices with DDR2 too)
Mainline Images:
Source: GitHub - knaerzche/LibreELEC.tv at ml-master
Images: Release RK322x first mainline release · knaerzche/LibreELEC.tv · GitHub
Build against:
- LE 9.80
- Kernel 5.5.0
- uboot 202001
- mesa 20.0 (beta), which makes use of opensource lima drm gpu driver
Currently supported features:
- HDMI resolutions up to 2160p; CEC if device supports it (only none interlaced modes are supported by current RK DRM driver in mainline kernel)
- HW video decoding for MPEG2/VP8/H264 up to 1080p; everything else will be software decoded
- Wifi will work if there is a mainline driver available for your chipset
- no preconfigured RC keymaps (create your own, IR Receiver itself is working)
- all other IO-Ports should work as well (with the exception for analog audio and anlog AV Port: there is no driver available for RK322x in mainline yet)
Images are available for generic RK3229 and RK3228 device - 2 "optimized" images are also for A95XR1 and H96 Mini - optimization level is currently quite low.
Since there are currently no addons available for Rockchip in LE-9.80 branch I uploaded all pvr and inputstream addons to my release to make testing a bit easier for you 
Special thanks to jock2 and fabiobassa for testing and all sort of support
Give it a shot - any feedback is welcome - escapcially like jimjack12 did: Post if an image works with an box it is not made for: thanks
