(2019-06-22, 02:16)treboR2Robert Wrote: So I still feel we don't have definitive answers to these questions.
1. Is the only way to output MaxFall/MaxCLL using the 4.9 kernel ?
Yes and only on
confirmed (by HDMI analysis) on S922X devices like the ODROID N2 running CoreELEC.
Quote:2. Does CoreELEC or LibreELEC use the 4.9 kernel for s905 devices ? If not are there any plans for this and would MaxFall/MaxCLL output work ?
CoreELEC S922X devices like the ODROID N2 exclusively use the AMLogic v4.9 Linux Kernel.
LibreELEC is transitioning all supported devices to a mainline v4.1x+ Kernel, which will need a bunch of work for full HDR support.
LE might get there with full support by next year sometime. Stable HDR Kodi support for Kodi v19 M also has to be added.
Quote:3. Does CoreELEC currently use the 4.9 kernel for the odroid N2 ?
Yes & HardKernel are also providing ongoing Kernel support which is always welcome by developers.
Quote:4. @Sam.Nazarko said that beta's or new stack of OMSC are outputting MaxFALL/MaxCLL on the Vero4k+ (S905D) and provided photo evidence. What is the new stack, just the 4.9 kernel ?
I will let Sam explain, he has some work to do to transition Vero 4K's to the v4.9 Kernel. He might even skip it and go straight to Mainline. I don't know.
Quote:4. @wesk05 said the N2 running CoreELEC does output MaxFALL/MaxCLL but where did this info come from ? Does anyone have any proof ?
Confirmed and already proven by @
wesk05
Quote:5. Will the s912 devices "ever" be able to use the 4.9 kernel ?
At the moment I doubt it.
CE AML developers will be concentrating on S922X. Maybe S905X3 or S905D3 devices. Big Maybe.
LE devs. might get HDR working properly on S912 with a mainline HDR supported Kernel next year.
LE S912 will be an even snappier Linux Kodi device when that happens when it also uses, stable open source Linux ARM T-series GPU drivers.
Quote:6. What about Rock64 and Rock64 Pro ? Do they use the same kernels ? Do they output MaxCLL/MaxFALL and or HDR10+ ?
They will be using a mainline Kernel.
Correct Rockchip HDR Metadata output is incomplete, unless there have been very recent improvements. No idea about HDR10+
Quote:7. Is HDR10+ a possibility on the N2 with CoreELEC in the future ?
Possibly.
HDR10+ content is virtually non existant in the wild tho. which is why such support has not been prioritised.
Prime Video might have some HDR10+ content, but you need to use a video copy protected streaming App.
Quote:I currently have a s912 device running CoreELEC, but if I am not getting the best picture possible I will happily upgrade.
The question is to what ?
I don't want to spend near on £100 for a N2 if it will need replacing soon because it can't do something that the Rock64 Pro or Vero4k can.
The ARM G-52 GPU in the S922X devices is more powerful and feature packed vs the older ARM Mali-T series or even older Mali-450 GPU's.
I've not seen a new mid range or top spec ARM GPU's go backwards in picture quality or performance vs previous years if correct ARM (Linux) GPU drivers are used.
The CE Kodi Leia S912 combo is pretty snappy if you tweak the GPU MHz in CE Kodi System settings and disable Kodi's dirty regions.
However Chipset cooling can be a problem with cheap AMLogic Android S9xx devices once you push them hard.
My U9 with class leading passive chipset cooling is excellent, but it's relatively expensive.
As per post #1 of this thread if you want complete HDR Metadata output you need to look at devices from this list
https://forum.kodi.tv/showthread.php?tid...pid2823690
OR wait till sometime next year for stable - mainline HDR Linux Kernel, GPU driver and Linux Kodi v19 M HDR support.
W.