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<h1 class="page-title-header">Igalia’s Mesa 23.1 Contributions -
Behind the Scenes</h1>
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<p class="page-info-date">Published: 2023-05-11</p>
<p class="page-info-date">Last Edited: 2023-05-11</p>
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<p>It’s an exciting time for Mesa as its next major release is unveiled
this week. Igalia has played an important role in this milestone, with
Eric Engestrom managing the release and 11 other Igalians contributing
over 110 merge requests. A sample of these contributions are detailed
below.</p>
<h2 id="radv-implement-vk.check_status">radv: Implement
vk.check_status</h2>
<p>As part of an effort to enhance the reliability of GPU resets on
amdgpu, Tony implemented a GPU reset notification feature in the RADV
Vulkan driver. This new function improves the robustness of the RADV
driver. The driver can now check if the GPU has been reset by a
userspace application, allowing the driver to recover their contexts,
exit, or engage in some other appropriate action.</p>
<p>You can read more about Tony’s changes in the link below</p>
<ul>
<li><a
href="https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22253">https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22253</a></li>
</ul>
<h2 id="turnip-kgsl-backend-rewrite">turnip: KGSL backend rewrite</h2>
<p>With a goal of improving feature parity of the KGSL kernel mode
driver with its drm counterpart, Mark has been rewriting the backend for
KGSL. These changes leverage the new, common backend Vulkan
infrastructure inside Mesa and fix multiple bugs. In addition, they
introduce support for importing/exporting sync FDs, pre-signalled
fences, and timeline semaphore support.</p>
<p>If you’re interested in taking a deeper dive into Mark’s changes, you
can read the following MR:</p>
<ul>
<li><a
href="https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21651">https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21651</a></li>
</ul>
<h2 id="turnip-a7xx-preparation-transition-to-c">turnip: a7xx
preparation, transition to C++</h2>
<p>Danylo has adopted a significant role for two major changes inside
turnip: 1)contributing to the effort to migrate turnip to C++ and
2)supporting the next generation a7xx Adreno GPUs from Qualcomm. A more
detailed overview of Danylo’s changes can be found in the linked MRs
below:</p>
<ul>
<li><a
href="https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21931">https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21931</a></li>
<li><a
href="https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22148">https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22148</a></li>
</ul>
<h2 id="v3dv3dv-various-fixes-cts-conformance">v3d/v3dv various fixes
& CTS conformance</h2>
<p>Igalia maintains the v3d OpenGL driver and v3dv Vulkan drive for
broadcom videocore GPUs which can be found on devices such as the
Raspberry Pi. Iago, Alex and Juan have combined their expertise to
implement multiple fixes for both the v3d gallium driver and the v3dv
vulkan driver on the Raspberry Pi. These changes include CPU performance
optimizations, support for 16-bit floating point vertex attributes, and
raising support in the driver to OpenGL 3.1 level functionality. This
Igalian trio has also been addressing fixes for conformance issues
raised in the Vulkan 1.3.5 conformance test suite (CTS).</p>
<p>You can dive into some of their Raspberry Pi driver changes here:</p>
<ul>
<li><a
href="https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22131">https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22131</a></li>
<li><a
href="https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21361">https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21361</a></li>
<li><a
href="https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20787">https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20787</a></li>
</ul>
<h2 id="ci-build-system-and-cleanup">ci, build system, and cleanup</h2>
<p>In addition to managing the 23.1 release, Eric has also implemented
many fixes in Mesa’s infrastructure. He has assisted with addressing a
number of CI issues within Mesa on various drivers from v3d to panfrost.
Eric also dedicated part of his time to general clean-up of the Mesa
code (e.g. removing duplicate functions, fixing and improving the
meson-based build system, and removing dead code).</p>
<p>If you’re interested in seeing some of his work, check out some of
the MRs below:</p>
<ul>
<li><a
href="https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22410">https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22410</a></li>
<li><a
href="https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21504">https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21504</a></li>
<li><a
href="https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21558">https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21558</a></li>
<li><a
href="https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20180">https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20180</a></li>
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