V4L2 Support For DMA-BUF Will Come In Linux 3.8
Posted by Michael Larabel on December 13, 2012
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.
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.
Discuss this article in our forums, IRC channel, or email the author. You can also follow our content via RSS and on social networks like Facebook, Identi.ca, and Twitter (@Phoronix and @MichaelLarabel). Subscribe to Phoronix Premium to view our content without advertisements, view entire articles on a single page, and experience other benefits.
Copyright © 2004 - 2013 by Phoronix Media.
All trademarks used are properties of their respective owners. All rights reserved. Legal Disclaimer & Disclosure.
Powered by the Phoronix Content Management System (PHXCMS-7.4).
All trademarks used are properties of their respective owners. All rights reserved. Legal Disclaimer & Disclosure.
Powered by the Phoronix Content Management System (PHXCMS-7.4).