Samsung Exynos DRM Prepares For New Kernel
Written by Michael Larabel in Hardware on 14 December 2012 at 03:45 PM EST. Add A Comment
Yet more to report on with Linux 3.8... Samsung developers responsible for the Exynos DRM graphics driver component have readied their exynos-drm-next tree for pulling with new features.

First of all, with the Linux 3.8 kernel when using the Samsung Exynos DRM driver, the DMA-BUF attach/detach feature is supported. As already reported on, Linux 3.8 will support DMA-BUF buffer sharing for V4L2 drivers and so the Samsung Exynos SoCs will be able to share buffers between the DRM graphics driver and their Video 4 Linux 2 component without needing to copy the memory. The attach/detach feature now supported is to resolve a performance issue when the V4L2 driver is using an imported GEM buffer.

The other major addition to this open-source ARM kernel graphics driver is landing the IPP subsystem framework. The Exynos IPP subsystem is for Image Post Processing and supports image scalar/rotator/crop/flip/color-space and input/output operations.

Another highlight is run-time power management support for the HDMI driver. Other changes include supporting the DMA attribute for no kernel mapping, moving around DRM device and HDMI device registration, and various fixes and clean-ups.

These changes were discussed this morning on dri-devel. Expect the official Linux 3.8 DRM pull request to happen in the coming days.
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Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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