Full media controller integration for both ALSA and ASoC. How this can be used to export topology information to userspace and how to for example attach a specific volume control to a specific media controller entity. And maybe also how to de-duplicate similar functionality between DAPM and media controller.
This is something I looked at, without much progress though beyond a set of initial patches to make use of the media controller API. There were two issues: - one was to agree on a syntax/format for the (binary) topology information exposed by the kernel. - the main issue was really how to link a user-visible volume slider to a specific or group of volume controls. A number of people have tried this before in other contexts and it's really hard to do based on topology information only.
But yes a good topic to re-discuss -Pierre