Back in April there were hopes by the Linaro developers to unify the Linux video memory management APIs so that there could be more to share between embedded and desktop/mobile graphics, etc. There were some concerns over these plans as it possibly just being a fork of GEM or the like.
After three afternoons of debating, the outcome is that the new Linaro video memory management solution will involve extending the DMA and IOMMU APIs. Once the DMA and IOMMU APIs have been extended to their liking, an effort will be made to move to a single sub-system (more than likely using GEM buffers) and the ability to pass these buffers between sub-systems. GEM and CMA will need to be slightly re-worked as a result.
The official notes for the UDS Budapest Linaro graphics memory management mini-summit can be found for day 3, day 2, and day 1.