Mesa News Archives

The second release candidate of Mesa 20.3 is now available for testing ahead of its likely stable debut in early December.

More improvements are coming to Mesa 21.0 following last week's merging of the Direct3D 12 Gallium3D driver that is being used by Microsoft for supporting OpenGL/OpenCL-on-Direct3D 12.

For those trying to setup their Linux systems to be "Big Navi"-ready if purchasing one of the new graphics cards today, some more last minute fixes have landed within Mesa.

It's still short of the full OpenCL 3.0 implementation, but more of the CL 3.0 enablement patches for Gallium3D's "Clover" OpenCL state tracker have now been merged into Mesa 20.1-devel

The newly-opened Mesa 21.0 development window has merged support for EGL_EXT_platform_xcb.

The long-standing patches by Bas Nieuwenhuizen on implementing DMA-BUF modifier support for the RadeonSI code within Mesa has now been merged for next quarter's Mesa 21.0 feature release.

Following the news today of Intel sharing ~60% of their GPU driver code-base between Windows and Linux and working to bring the Intel Graphics Compiler (IGC) to Mesa in 2021, not everyone is enthusiastic about those prospects.

Following the Mesa 20.3 branching on Monday and subsequent opening of Mesa 21.0 for development, the first release candidate of Mesa 20.3 is now available for testing.

Mesa 20.3 was branched this evening in marking the end of feature development for this Q4-2020 Mesa3D release that should debut as stable in December. This also means that Mesa 21.0 is now open for development.

For those sticking to stable releases of Mesa3D there is Mesa 20.2.2 now available as the latest point release.

Zink as the Mesa Gallium3D implementation putting OpenGL 3.x/4.x on top of the Vulkan API is now offering near-native performance.

It's not across the finish line at least yet but Mesa 20.3 just merged today the initial prep changes needed for exposing OpenCL 3.0 support within the Clover Gallium3D state tracker.

Following the news that we were first to report last month on Intel starting open-source public patches for Vulkan ray-tracing in preparation for their forthcoming Xe HPG graphics card, the initial prep work for that Vulkan ray-tracing support has now been merged in time for Mesa 20.3.

With Mesa 20.3 that should be released as stable in December there is working Arm Bifrost graphics support for the open-source Panfrost Gallium3D while looking past that this Arm Mali driver is going to be focusing on better performance and desktop OpenGL 3.1 support.

Beginning with Mesa 20.2 is OpenGL 4.5 support for LLVMpipe, the LLVM-based software rasterizer built as a Gallium3D driver. This succeeded LLVMpipe for years being limited to OpenGL 3.3. While the OpenGL 4.5 support has been enabled for weeks, The Khronos Group has now officially confirmed its implementation.

On top of the AMD Zen L3 cache optimizations hitting Mesa 20.3 today, Marek Olšák has also landed his RadeonSI Gallium3D driver code for optimizing OpenGL uber shaders.

You may recall going back to 2018 that well known open-source AMD Mesa driver developer Marek Olsak was working on Mesa optimizations around the AMD Zen architecture. In particular, better handling of Mesa for Zen's L3 cache design. A rewritten implementation of that has now landed along with some other improvements.

Last week Intel open-source engineers began publishing Linux kernel patches for the "Alder Lake S" graphics support. That work should be found in the Linux 5.11 cycle being christened as stable in early 2021. In user-space, Alder Lake graphics patches also appeared for their OpenCL / oneAPI Level Zero compute stack and now merged into Mesa 20.3 as well for OpenGL / Vulkan support.

Not only is the Zink Gallium3D code for OpenGL accelerated by Vulkan up to around 69% the speed of Intel's OpenGL driver but it's at around a 97% passing test rate for Mesa's Piglit testing.

The interesting work continues pouring in for Mesa 20.3 as the Q4'2020 feature release to this open-source graphics stack... The latest excitement is on the "Clover" front for Gallium3D OpenCL.

Mesa 20.3 has merged a long work-in-progress patch series providing support for going from the modern NIR intermediate representation to TGSI as the conventional Gallium3D IR.

An independent party has slowly begun merging patches into mainline Mesa for allowing the open-source Radeon Vulkan driver "RADV" to build on Microsoft Windows.

For weeks there have been patches getting the Zink OpenGL-on-Vulkan implementation to OpenGL 4.6 while mainline Mesa has been at OpenGL 3.0 support. Thankfully the out-of-tree patch delta is being reduced and this week in Mesa 20.3-devel the code has been upstreamed getting the support level to OpenGL 3.3.

The Zink Gallium3D code for Mesa that is mapping OpenGL on top of the Vulkan API continues making great progress particularly with the near-daily work by developer Mike Blumenkrantz.

Mesa 20.2 officially released at the end of September as the Q3'2020 open-source driver stack update providing open-source OpenGL/OpenCL/Vulkan support for much of the graphics hardware on the market. For those that prefer waiting for the first point release before upgrading, that milestone was reached today.

Good news for Raspberry Pi 4 users... The V3DV Vulkan driver developed over the past year for newer Broadcom VideoCore hardware with an emphasis on the Raspberry Pi 4 support is now mainlined in Mesa 20.3!

Adding to the growing list of Mesa 20.3 features is now RADV ACO supporting NGG GS. Or rather, the Radeon Vulkan driver with the ACO back-end now supports geometry shaders with Next-Gen Geometry (NGG) as found on newer AMD GPUs.

With this quarter's Mesa 20.3 the Gallium3D "Clover" state tracker providing OpenCL support finally can handle version 1.2!

A proposal is being discussed over the possibility of beginning to make use of the Rust programming language within Mesa 3D for this open-source OpenGL/Vulkan driver stack along with the likes of Gallium3D video acceleration.

The open-source Panfrost graphics driver, which is now backed/supported by Arm after starting as a reverse-engineering effort, has picked up support for the Mali G72 GPU.

Mesa 20.2 has managed to release just before the end of the the quarter. This Mesa Q3'2020 graphics driver update is coming out about one month behind schedule but the wait is worthwhile given many open-source OpenGL and Vulkan driver updates.

For those following the development of Zink as a software OpenGL driver built atop the Vulkan API, there are some new performance numbers to discuss this weekend.

While the Linux kernel graphics drivers and user-space OpenGL/Vulkan drivers expose a lot of options via sysfs on the kernel side and various environment variables and other tunables in user-space, when it comes to graphical control panels to manage these open-source graphics drivers on Linux there are several fragmented different options. For Mesa drivers, ADRIConf remains the leading option.

The TURNIP driver that is associated with the Freedreno driver effort for providing an open-source Vulkan driver for Qualcomm Adreno graphics hardware can now run atop Qualcomm's KGSL kernel driver.

One of the less talked about open-source graphics drivers talked about is Etnaviv as the reverse-engineered, community-based driver providing OpenGL/GLES support for Vivante graphics IP. While it's still working towards OpenGL ES 3.0 compliance, its performance is currently in some cases competitive -- and even outperforming -- the Vivante proprietary driver.

After working on getting the Zink OpenGL-over-Vulkan driver up to OpenGL 4.6 with still pending patches, former Samsung OSG engineer Mike Blumenkrantz has been making remarkable progress on the performance aspect as well.

Etnaviv as the open-source, reverse-engineered OpenGL graphics driver for Vivante graphics IP now has support for an on-disk shader cache.

Building off the V3DV driver talk at XDC2020 about this open-source Vulkan driver for the Raspberry Pi 4 driver, the Igalia developers responsible for this creation have laid out their plans on getting this driver upstream within Mesa.

Mesa 20.2 (or 20.2-RC5) didn't debut last week as intended, but for the interim the Mesa 20.1.x release cycle brought 20.1.8 on Wednesday and now it's been extended to having at least a ninth point release to allow more time until not only Mesa 20.2.0 to ship but Mesa 20.2.1 alignment.

Mesa 20.3 feature development continues progressing nicely.

Being merged today to Mesa 20.3-devel were some improvements aiming to help with display presentation jitter and hopefully avoid stuttering in the frame-rate.

Wired up in Mesa 20.3-devel is a new DriConf option override_vram_size for overriding a smaller amount of video memory to report to the program/game being run. This is intended for development/debug purposes.

The fourth and likely last release candidate of Mesa 20.2 is now available for testing while the formal release should happen next week.

While Mesa 20.2 will hopefully be out next week, Mesa 20.1.7 is out today as the newest stable release for this collection of open-source Linux graphics drivers.

With the soon to be released Mesa 20.2, the RADV Vulkan driver is using the ACO back-end by default that's been developed with funding by Valve as an alternative to AMD's official "AMDGPU" LLVM back-end. For those wondering how this shader compiler back-end compares and more intricate details of its design, some extensive documentation has finally been added to the Mesa tree.

After forgetting to release last week, Mesa 20.2-RC3 is out as the newest test build of this quarterly Mesa3D feature release for the collection of open-source OpenGL/Vulkan drivers.

Mesa Gallium3D is close to seeing a major change in their intermediate representation path for drivers consuming Gallium's TGSI rather than NIR directly. Eric Anholt has been working on a NIR-to-TGSI path so that drivers still relying on TGSI can benefit from the NIR optimization paths and improvements while ultimately hoping to eliminate the existing GLSL-to-TGSI code-path currently relied upon by these drivers.

While the feature rich Mesa 20.2 should be christened as stable within the next couple of weeks, Mesa 20.1.6 is out today as for what is now the newest bi-weekly stable point release for this collection of open-source OpenGL/Vulkan drivers.

It landed sooner than anticipated but the LLVMpipe patches enabling OpenGL 4.5 support were merged to Mesa 20.3-devel today and are also marked for back-porting to the Mesa 20.2 series soon to be promoted to stable.

Red Hat's David Airlie has been on quite a spree lately with open-source graphics driver improvements from OpenGL 4 for LLVMpipe to now merging "VALLIUM" for a Vulkan software implementation.