[PATCH 02/11] drm: Add a callback from connector registering

[Chris Wilson]

On Mon, May 30, 2016 at 10:49:43AM +0200, Daniel Vetter wrote:
> On Fri, May 27, 2016 at 03:00:35PM +0100, Chris Wilson wrote:
> > If a driver wants to more precisely control its initialisation and in
> > particular, defer registering its interfaces with userspace until after
> > everything is setup, it also needs to defer registering the connectors.
> > As some devices need more work during registration, add a callback so
> > that drivers can do additional work if required for a connector.
> > 
> > Correspondingly, we also require an unregister callback.
> > 
> > Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> > Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
> > Cc: dri-devel at lists.freedesktop.org
> 
> Smells a bit too much like midlayer too me ;-) Imo perfectly fine to have
> a driver loop besides the register_all which registers stuff like
> backlights and similar things. But otoh this is a bit a high-grade
> bikeshed ...

We either:

intel_connector_register()
{
	drm_connector_register()
	intel_connector->register();
}

intel_connector_unregister()
{
	intel_connector->unregister();
	drm_connector_unregister()
}

or

drm_connector_register()
{
	/*blah*/
	connector->func->register();
}

drm_connector_unregister()
{
	connector->func->unregister();
	/*blah*/
}

We still get to drive the registration (hence why it doesn't smell too
much like midlayer just a vfunc wrapper), just the second is a tad more
generic and we aren't the only ones who require the calback.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre