[PATCH 3/3] drm/vkms: fbdev emulation support

[Pekka Paalanen]

On Mon, 12 Oct 2020 16:23:35 +0200
Daniel Vetter <daniel at ffwll.ch> wrote:

> On Mon, Oct 12, 2020 at 02:40:58PM +0200, Neil Armstrong wrote:
> > Hi,
> > 

...

> > It's weird because it the kernel is misconfigured and no console is specified on the cmdline
> > this console could become the main console...
> > 
> > It's a great feature, but couldn't this be a module parameter ?  
> 
> If you have vkms enabled in a distro, you're doing it wrong.

That's really not a great position to take. I would prefer that
if a random contributor writes a Weston patch and runs 'meson test', it
will use VKMS to run Weston's DRM-backend tests on his machine
automatically, maybe save for some seat and device node access
permissions bits which distributions could be delivering as well.

Just put the VKMS device node into a non-default seat, and Xorg etc.
will happily ignore it.

For the fbdev device node, I don't know. Maybe a module parameter
really is a good choice there, defaulting to off. I have no interest in
testing anything against fbdev, but other people might disagree of
course.

Why? Gitlab CI is still not running tests for every commit, just per
MR, and it might even be infeasible too.

I am also hoping for a future where I don't have to build my own kernel
just to be able to run Weston DRM tests with VKMS. That means I want to
be able to run my machine with VKMS loaded and active at all times,
without affecting the normal desktop. I already have such a setup with
an extra AMD card, but you can't run most KMS tests against real
hardware drivers.


Thanks,
pq
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