Am 15.01.21 um 20:21 schrieb Peter Robinson:
The RPi4 has changed this up some and the 3D render unit is now driven
by the v3d component and associated driver, and the display engine and
bridges such as HDMI are driven by the vc4 component.
The vc4 work landed upstream in 5.10 but the v3d components haven't as
yet, so there is potentially the possibility to have some improvements
there but I'm not sure how much of it actually works and if all of it
is there from the vc4 side and if not what is missing. I've briefly
looked but I've not had time to debug it as yet because as far as I'm
concerned accelerated graphics on the rpi4 is unsupported in F-33 and
is still under consideration for F-34.
The upstream v3d driver isn't ready for bcm2711 yet. In order to support
Nicolas (current RPi-kernel maintainer), i send some minor patches to
the kernel mailing list [1] during the holidays, which have been
accepted. But there is more work to do like adapting the bcm2835-power
driver for bcm2711 (incl. v3d support).
Regards
Stefan
[1] -
https://lore.kernel.org/dri-devel/20210106150929.qsyuosde6i5q3isc@gilmour/T/