[Bug 103364] Black Screen Flickering

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103364

--- Comment #2 from Wolfgang Haupt <haupt.wolfgang at gmail.com> ---
I did some investigation and it seems to be a bandwith issue.
I've rebased following patch series on current (todays) drm-tip:
https://patchwork.freedesktop.org/series/28536

You can find the branch here: (I applied the patches with std patch, so I lost
author information, I added the original author with the signed-off tag, not
sure if this is the right thing to do, it's only for discussion anyway)
https://github.com/a1rwulf/drm-tip/commits/yuv420

It didn't work out and my system never switched to 4:2:0 until I tried this
commit:
https://github.com/a1rwulf/drm-tip/commit/45998e4d79aa20a31594143a3a053279fa52ab87

According to my dmesg output something seems wrong, though (yuv420_dmesg.log).
But this fixes the blackscreen flickering.

I'd really like to see progress with this yuv 4:2:0 mode as it seems to fix a
big issue for many Intel NUC users that want to use it as a HTPC and have a GUI
running in 4k at 60.

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