DMA-BUF Feedback Support For Wayland Lands In Mesa 22.0's EGL Code
Written by Michael Larabel in Mesa on 27 November 2021 at 06:03 AM EST. 27 Comments
MESA --
Landing in Mesa on Black Friday was DMA-BUF Feedback support within the EGL code as another important step forward for Wayland.

Introduced earlier this week was Wayland Protocols 1.24 and the primary addition to that collection of protocols is DMA-BUF feedback support. The DMA-BUF "feedback" support is important for Wayland multi-GPU systems where needing to know more information about the GPU device used by the compositor and for being able to efficiently exchange buffers between the secondary and primary GPUs.

The DMA-BUF feedback support for Wayland's DMA-BUF protocol adds the concept of the "main device" and "tranches" that specify format/modifier pairs for ensuring the buffers can be exchanged in a compatible manner for direct scan-out.

On Friday this Mesa Git merge happened for the code that has been under review for the past five months. This code gets DMA-BUF Feedback support wired into the EGL code for Mesa 22.0.

Making use of this protocol addition on the compositor side is already pending for wlroots and Weston while other compositors should follow suit in the near future.
Related News
About The Author
Author picture

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 20,000 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.

Popular News This Week