AMD R600g Tessellation Support Lands In Mesa Git
Written by Michael Larabel in AMD on 6 December 2015 at 08:41 PM EST. 68 Comments
AMD --
Just one week after talking about progress being made with AMD tessellation support for pre-GCN GPUs, the support has been finally added to Mesa Git!

David Airlie's work has come to fruition and landed in Mesa Git for enabling tessellation on Evergreen and Cayman GPUs. Due to hardware factors, not all R600g graphics processors are able to support tessellation easily, but just the HD 5000 "Evergreen" and HD 6900 "Cayman" graphics cards. Testing is needed for other HD 5000/6000 series hardware.

However, beyond tessellation, the R600g driver will only support FP64 for Cypress and Cayman GPUs meaning just the HD 5800 and HD 6900 series are going to move a bit further into the OpenGL 4 world.

This now technically marks the R600 Gallium3D driver as supporting OpenGL 4.1 for select GPUs, which matches the state of RadeonSI. Blocking the two drivers from OpenGL 4.2 are ARB_shader_atomic_counters and ARB_shader_image_load_store.
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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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