[PATCH v2 12/26] drm/exynos: Split manager/display/subdrv

[Dave Airlie]

> As I mentioned earlier, display_ops is needed to have no any
> dependency of drm framework directly like below,
>
>                                           DRM Framework
>                                                        |
>                                         Exynos DRM Framework
>                                                     /   |   \
>                                          Real device drivers
>
> In particular, in case of ARM based DRM drivers with separated
> devices, I still tend to think it's better design than that device
> drivers implement the connector callbacks directly, but I will try to
> consider what is the better way.
>

I think we need to start considering a framework where subdrivers just
add drm objects themselves, then the toplevel node is responsible for
knowing that everything for the current configuration is loaded.

I realise we may need to make changes to the core drm to allow this
but we should probably start to create a strategy for fixing the API
issues that this throws up.

Note I'm not yet advocating for dynamic addition of nodes once the
device is in use, or removing them.

Dave.