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RK3588 Kernel Patches for H.265 Hardware Encoding and HDMIRX EDID fix

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My recent RK3588 kernel adventure:

- dual-core H.265 (HEVC) encoding working live at full 4K@60 on armbian-build edge kernel (6.19-rc8) for Rock 5B[+] and Orange Pi 5 Ultra.

- fix for setting HDMIRX EDID (this didn't work in mainline on any of my tested hardware)

 

This is out-of-tree (practical focus over upstream goals), but it's stable and producing clean bitstreams.

Repo: https://github.com/rcawston/rockchip-rk3588-mainline-patches

 

Feedback welcome. 

Hi @Ross Cawston 

 

I've been using your patch for a few months on Orange Pi 5 Plus/Max SBCs with Linux kernels from 6.19 to 7.0.3 and it works well encoding H.264 streams (didn't try H.265, though)

 

Thank you for your contribution. 

 

There's still no support for `rkvenc` in edge kernels (as of 7.1rc2). 

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