I've already written about the first Radeon driver changes as well as NVIDIA Tegra changes being prepped for the Linux 3.10 kernel. The Intel changes being prepared for merging into the Linux 3.10 kernel are also now a bit more clear.
Daniel Vetter of Intel's Open-Source Technology Center has written about some of their queued up 3.10 Intel DRM driver changes on his blog.
- More proper Intel Linux GPU overclocking support.
- Haswell Turbo support.
- Hotplug IRQ storm mitigation.
- VT-switchless suspend/resume for a more clean suspend/resume process.
- Display-less GPU support for not using the Intel graphics to drive any actual displays but rather for just using integrated Intel graphics for video transcoding or presumably OpenCL/GPGPU in the future.
- Pipe configuration tracking.
- Low-level GTT interface rework.
- Page-flipping improvements.
- Various other small and big bug-fixes and enhancements.