s905w kernel 4.9 Android 9.0 is HDCP broken - Android Stick & Console AMLogic based Computers

Hello !
Is HDCP 1.1 / 1.4 / 2.2 not working under Android 9.0 and kernel 4.9 on the s905w firmwares ?
From Android 9.0
Android boots allso in to 4k. So accutally hdcp is working. (some parts)
Not the 720p screen to fake 1080p. Real 4k output
DRMINFO shows - broken hdcp and Widevine.
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Exoplayer demo apk , on rooted device. x96 mini stock 9.0 firmware it´s pre rooted.
Can acctually play most of the videos. And it wierd that you can se the HD Secure videos.
https://youtu.be/waiCA6FP-6M
and UHD https://youtu.be/mkkSkz0UHcQ
Exoplayer HDCP test fail after 9 second , but this is known when hdcp is broken / missing.
https://youtu.be/7EktpRzK7n4
Kaltura Device Info apk = Widevine Provisioning = Working.
S youtube is 4k .
https://youtu.be/s7WGbTIdhkQ -- https://youtu.be/mkkSkz0UHcQ
Due to more working software, 9.0 works better.
I removed root and Exoplayer demo is now broken.
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Android 7.1.2
Under 7.1.2 it´s semi works. kernel 3.x something. (M8 PRO W FW. )
Android boots allso in to 4k. So accutally hdcp is working. (some parts)
Not the 720p screen to fake 1080p. Real 4k output
DRMINFO shows.
Exoplayer demo apk - Can acctually NOT play most of the videos.
Non of secure videos work.
S Youtube plays 4k video. screen is 1080p ?
Wierd. TV shows 4k output. ? but youtube is 1080p playing 4k video ?
Kaltura Device Info. Widevine Provisioning = Not Working.
Android boots allso in to 4k. so accutally hdcp is working.
Not the 720p screen to fake 1080p. Real 4k output.
Does not matter if root or not. 7.1.2 is kind more broken. But L1 show.
And lib´s can acctually be fixed and the tee files to.
Due to LESS software on 7.1.2 working software, Android 9.0 works better.
But i think 7.1.2 i far more easy to mod file system...
TWRP.
I cant find a working TWRP for 9.0 android/Kernel 4.9 for this s905w.
Was trying to install magisk manager, no succes.
Any one else.
ps. dont ask for keys.
It´s all info on the internet, do some search / research.