HDMI eARC on VIM3L S905D3 aka HDMI Audio Return Channel

[Darkimmortal]

@2bluesc

1. Does the eARC driver on the 4.9 kernel work? Has anyone ever used it? Curious to understand the status of this.
2. Is anyone aware of efforts to forward port the AUGE eARC driver to the mainline 5.5 or later kernel (5.5 kernel added CEC framework driver).
3. Has anyone backported the CEC framework driver to the 4.9 kernel?

As far as I have found the answer to all 3 questions is ‘no’, however I have had success with both eARC and the new CEC framework using the amlogic patched kernel 5.4 from the VIM4 on the VIM3L. Documenting my progress in this thread: https://forum.khadas.com/t/amlogic-kernel-5-4-on-vim3l/