[BUG] rkvdec-vdpu383-h264: wrong pixels at horizontal de-blocking edges y=4 and y=12

[Laszlo Fiat]

Hi Simon,

I've experienced this problem since Detlev sent the VDPU383 support patches to the mailing list.
We had a brief e-mail exchange about it in January 2026, he couldn't reproduce it.

I've tested your patch available at [1] on 7.0.12 stable on my Rock 4D.
The patched kernel builds, the expected "RK3576 H.264 deblock priming..." line shows up
in dmesg, and this is the first time I have H.264 hardware decoding working properly
on the Rock 4D.

Thank you for your work.

Tested-by: Laszlo Fiat <laszlo.fiat at tuta.io>

[1]  https://github.com/SympleNZ/rkvdec-vdpu383-h264-bug/tree/master/fix