Thierry Reding published a patch series on Friday to create an initial framework to better handle ARM SoCs with the DRM/KMS sub-system. The patches provide an actual framework plus a basic skeleton driver to show how to use this proposed DRM/SoC API.
As far as the need to create a new framework focused upon these ARM System-on-a-Chips, "The reason for implementing this is that the approach currently used by many SoC DRM drivers is to instantiate a dummy platform device for the DRM driver to bind against, which is somewhat of a kludge. The proposal in this series takes care of this implicitly and instantiates only what is really needed to make the DRM core happy."
The commit message goes on to describe:
This commit adds an initial framework that can be used to plug SoC graphics devices into the DRM/KMS subsystem.The patches in the RFC state can be found on the dri-devel list. So far no other DRM developers have commented on these patches.
SoCs often don't have a dedicated device to which a DRM driver can bind, but instead the graphics complex typically consists of several platform-type devices that work together. The DRM SoC support code therefore adds a dummy device that is associated with the DRM driver, which typically provides some kind of API for other drivers to register with.