AMD R600g HyperZ Support Is Now In Better Shape
Written by Michael Larabel in AMD on 14 December 2012 at 04:41 AM EST. 10 Comments
It was just days ago that the R300 Gallium3D driver got HyperZ support fixed-up and was finally enabled by default for bettering the OpenGL gaming performance with the open-source Linux graphics driver. Now it looks like the newer R600g driver is getting into shape for properly handling ATI/AMD HyperZ.

Jerome Glisse sent out a new patch-set concerning HyperZ support for R600g. Jerome wrote, "Ok so this time it should be it. Following patch seems to behave properly. I am still in process of checking again that they don't regress anything, I should be done Monday or Tuesday. If there is no objection by them I will commit them."

It was earlier this year that it was thought HyperZ defeated open-source driver developers for the newer Gallium3D driver. The problems with HyperZ support on the newer Radeon graphics hardware came down to errors within the GPU command stream. Some progress was made after that point with Atom state emission but not much more was heard about R600g HyperZ in recent months.

Jerome Glisse has now stepped up with improvements to R600g HyperZ that he says is yielding 2~10% performance improvements based upon the graphics processor and OpenGL workload while working reliably. The HyperZ feature to ATI/AMD GPU hardware consists of Z compression for minimizing the Z-Buffer bandwidth, fast Z clear, and a hierarchical Z-Buffer.

Jerome's R600g HyperZ patches include reworking the flushing and synchronization pattern to match that of the closed-source Catalyst driver and adding htile for HiZ and HiS support and fast Z/S clears. With these patches the Mesa driver isn't yet taking full advantage of HiS.

These latest R600g HyperZ support patches are currently residing on the mesa-dev list until hopefully being merged to the mainline Mesa repository in the coming days.

About The Author
Author picture

Michael Larabel is the principal author of 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 automated benchmarking software. He can be followed via Twitter or contacted via

Related AMD News
Popular News
Trending Reviews & Featured Articles