V4L2 Support For DMA-BUF Will Come In Linux 3.8
Written by Michael Larabel in Hardware on 13 December 2012 at 05:13 AM EST. 5 Comments
The Linux 3.8 kernel that just officially entered development days ago will feature support with Video 4 Linux 2 (V4L2) for handling DMA-BUF buffer sharing.

DMA-BUF V4L2 support has been a work in progress for several months, but with Linux 3.8 the support has finally landed. This support allows for zero-copy buffer sharing using DMA-BUF so that, for example, a DMA-BUF-supported V4L2 driver could pass a buffer to be imported by a DRM graphics driver without actually needing to copy the buffer. Supported V4L2 drivers (such as the s5p-fimc V4L driver) can import and export buffers using DMA-BUF with other Linux kernel drivers.

The Video 4 Linux 2 DMA-BUF buffer sharing support is part of the media updates pull for the Linux 3.8 kernel. Aside from the DMA-BUF support, other media changes for Linux 3.8 include a "s3c-camif" Exynos hardware driver, various warning fixes, and then various bug-fixes, clean-ups, and driver improvements.
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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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