[PATCH v1 00/35] drm: Analog TV Improvements

[Dom Cobley]

On Fri, 26 Aug 2022 at 05:08, Mateusz Kwiatkowski <kfyatek at gmail.com> wrote:
> - Commenting out the pm_runtime_put() / pm_runtime_get_sync() calls in vc4_vec.c
> - Reverting this PR by Dom Cobley a.k.a. popcornmix:
>    https://github.com/raspberrypi/linux/pull/4639
>
> Either of these approaches makes VEC mode switching work again. Obviously
> neither is appropriate for a permanent solution.

Might be worth trying the latest rpi-update firmware.
There was a change that affects restoring PIXEL/VEC clocks after a
power domain cycle.
There is also a fix for a USB boot breakage.

If you still have an issue that occurs in downstream pi tree but not
upstream, then create a linux github issue.