W dniu 26.08.2022 o 16:56, Dom Cobley pisze:

On Fri, 26 Aug 2022 at 05:08, Mateusz Kwiatkowski [off-list ref] wrote:

quoted

- 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.

Hi Dom,

I just tested the 868f1cf firmware and its associated kernel, and everything
works like a charm for me, both USB boot and VEC power management.

Thanks!


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