KMS seems broken in vc4.ko

[Maxime Ripard]

Hi,

On Fri, Mar 12, 2021 at 07:05:43PM +0900, Ryutaroh Matsumoto wrote:
> I found yet another symptom of vc4.ko in the upstream kernel and
> the Raspberry Pi OS kernel (with module_blacklist=v3d in cmdline.txt).

I'm not sure I follow you, last time you reported something you had to
blacklist vc4, not v3d?

> kmscube at https://gitlab.freedesktop.org/mesa/kmscube
> works just fine when both vc4.ko and v3d.ko are loaded by Raspberry Pi OS,
> but when only vc4.ko is loaded, kmscube fails as follows:

v3d provides the 3d hardware acceleration on the bcm2711, so it's not
surprising to me that kmscube would fail if it's not there

Maxime
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