Intel Has Good DRM Driver Changes In Linux 3.9
Written by Michael Larabel in Intel on 18 February 2013 at 01:09 AM EST. 4 Comments
The Intel DRM graphics driver will feature a number of user-facing improvements within the Linux 3.9 kernel.

Going back to last month I've been talking about Intel DRM driver changes for Linux 3.9 that have been queuing up for this future kernel release. This work includes improved Intel Haswell support and KMS locking.

This weekend Daniel Vetter of Intel's Open-Source Technology Center posted a recap of the prominent Intel DRM driver changes for Linux 3.9.

- Kernel mode-setting locking to avoid stalling when probing outputs.

- Stolen memory support from the Fastboot patch-set. This work is to ultimately try to avoid mode-setting unnecessarily by the Intel DRM driver when it's loaded if the BIOS-configured mode is in good shape.

- VT/Switchless resume support for a cleaner experience when restoring your system from a suspended state.

- Improvements to GEM's GPU reset state transitions.

- Page-flipping across GPU hangs support.

- RBG broadcast range/reduced color range support for HDMI and DisplayPort outputs.

- Haswell Linux support includes handling the display power well, which allows for greater power savings when only the embedded DisplayPort (eDP) display is enabled.

- Improved Intel ValleyView support.

- No-relocations and execbuffer LUT extensions for better performance as buffers are no longer uselessly moved around between execbuffer calls thereby lowering the in-kernel relocation overhead. However, due to shortcomings in the DRM library, this feature is only used within the Intel DDX driver by the SNA 2D acceleration back-end.

- Massive GTT clean-ups.

- Improvements to Intel "Ironlake" Gen4 support by taking care of the relocation regression.

- The usual amount of small clean-ups and bug-fixes.

Daniel shared this list via his blog that also has more details about these forthcoming Intel Linux desktop changes.
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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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