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<h1 class="page-title-header">2022 Graphics Team Contributions at
Igalia</h1>
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<p>evergreen</p>
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<p class="page-info-date">Published: 2023-02-02</p>
<p class="page-info-date">Last Edited: 2023-02-02</p>
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<p>This year I started a new job working with <a
href="https://www.igalia.com/technology/graphics">Igalia’s Graphics
Team</a>. For those of you who don’t know <a
href="https://www.igalia.com/">Igalia</a> they are a <a
href="https://en.wikipedia.org/wiki/Igalia">“worker-owned, employee-run
cooperative model consultancy focused on open source software”</a>.</p>
<p>As a new member of the team, I thought it would be a great idea to
summarize the incredible amount of work the team completed in 2022. If
you’re interested keep reading!</p>
<h2 id="vulkan-1.2-conformance-on-rpi-4">Vulkan 1.2 Conformance on RPi
4</h2>
<p>One of the big milestones for the team in 2022 was <a
href="https://www.khronos.org/conformance/adopters/conformant-products#submission_694">achieving
Vulkan 1.2 conformance on the Raspberry Pi 4</a>. The folks over at the
Raspberry Pi company wrote a nice <a
href="https://www.raspberrypi.com/news/vulkan-update-version-1-2-conformance-for-raspberry-pi-4/">article</a>
about the achievement. Igalia has been partnering with the Raspberry Pi
company to bring build and improve the graphics driver on all versions
of the Raspberry Pi.</p>
<p>The Vulkan 1.2 spec ratification came with a few <a
href="https://registry.khronos.org/vulkan/specs/1.2-extensions/html/vkspec.html#versions-1.2">extensions</a>
that were promoted to Core. This means a conformant Vulkan 1.2 driver
needs to implement those extensions. Alejandro Piñeiro wrote this
interesting <a
href="https://blogs.igalia.com/apinheiro/2022/05/v3dv-status-update-2022-05-16/">blog
post</a> that talks about some of those extensions.</p>
<p>Vulkan 1.2 also came with a number of optional extensions such as
<code>VK_KHR_pipeline_executable_properties</code>. My colleague Iago
Toral wrote an excellent <a
href="https://blogs.igalia.com/itoral/2022/05/09/vk_khr_pipeline_executables/">blog
post</a> on how we implemented that extension on the Raspberry Pi 4 and
what benefits it provides for debugging.</p>
<h2 id="vulkan-1.3-support-on-turnip">Vulkan 1.3 support on Turnip</h2>
<p>Igalia has been heavily supporting the Open-Source Turnip Vulkan
driver for Qualcomm Adreno GPUs, and in 2022 we helped it achieve Vulkan
1.3 conformance. Danylo Piliaiev on the graphics team here at Igalia,
wrote a great <a
href="https://blogs.igalia.com/dpiliaiev/turnip-vulkan-1-3/">blog
post</a> on this achievement! One of the biggest challenges for the
Turnip driver is that it is a completely reverse-engineered driver that
has been built without access to any hardware documentation or reference
driver code.</p>
<p>With Vulkan 1.3 conformance has also come the ability to run more
commercial games on Adreno GPUs through the use of the DirectX
translation layers. If you would like to see more of this check out this
<a
href="https://blogs.igalia.com/dpiliaiev/turnip-july-2022-update/">post</a>
from Danylo where he talks about getting “The Witcher 3”, “The Talos
Principle”, and “OMD2” running on the A660 GPU. Outside of Vulkan 1.3
support he also talks about some of the extensions that were implemented
to allow “Zink” (the OpenGL over Vulkan driver) to run Turnip, and bring
OpenGL 4.6 support to Adreno GPUs.</p>
<p><div class="youtube-video"><iframe src="https://www.youtube.com/embed/oVFWy25uiXA"></iframe></div></p>
<h2 id="vulkan-extensions">Vulkan Extensions</h2>
<p>Several developers on the Graphics Team made several key
contributions to Vulkan Extensions and the Vulkan conformance test suite
(CTS). My colleague Ricardo Garcia made an excellent <a
href="https://rg3.name/202212122137.html">blog post</a> about those
contributions. Below I’ve listed what Igalia did for each of the
extensions:</p>
<ul>
<li>VK_EXT_image_2d_view_of_3d
<ul>
<li>We reviewed the spec and are listed as contributors to this
extension</li>
</ul></li>
<li>VK_EXT_shader_module_identifier
<ul>
<li>We reviewed the spec, contributed to it, and created tests for this
extension</li>
</ul></li>
<li>VK_EXT_attachment_feedback_loop_layout
<ul>
<li>We reviewed, created tests and contributed to this extension</li>
</ul></li>
<li>VK_EXT_mesh_shader
<ul>
<li>We contributed to the spec and created tests for this extension</li>
</ul></li>
<li>VK_EXT_mutable_descriptor_type
<ul>
<li>We reviewed the spec and created tests for this extension</li>
</ul></li>
<li>VK_EXT_extended_dynamic_state3
<ul>
<li>We wrote tests and reviewed the spec for this extension</li>
</ul></li>
</ul>
<h2 id="amdgpu-kernel-driver-contributions">AMDGPU kernel driver
contributions</h2>
<p>Our resident “Not an AMD expert” Melissa Wen made several
contributions to the AMDGPU driver. Those contributions include
connecting parts of the <a
href="https://lore.kernel.org/amd-gfx/20220329201835.2393141-1-mwen@igalia.com/">pixel
blending and post blending code in AMD’s <code>DC</code> module to
<code>DRM</code></a> and <a
href="https://lore.kernel.org/amd-gfx/20220804161349.3561177-1-mwen@igalia.com/">fixing
a bug related to how panel orientation is set when a display is
connected</a>. She also had a <a
href="https://indico.freedesktop.org/event/2/contributions/50/">presentation
at XDC 2022</a>, where she talks about techniques you can use to
understand and debug AMDGPU, even when there aren’t hardware docs
available.</p>
<p>André Almeida also completed and submitted work on <a
href="https://lore.kernel.org/dri-devel/20220714191745.45512-1-andrealmeid@igalia.com/">enabled
logging features for the new GFXOFF hardware feature in AMD GPUs</a>. He
also created a userspace application (which you can find <a
href="https://gitlab.freedesktop.org/andrealmeid/gfxoff_tool">here</a>),
that lets you interact with this feature through the
<code>debugfs</code> interface. Additionally, he submitted a <a
href="https://lore.kernel.org/dri-devel/20220929184307.258331-1-contact@emersion.fr/">patch</a>
for async page flips (which he also talked about in his <a
href="https://indico.freedesktop.org/event/2/contributions/61/">XDC 2022
presentation</a>) which is still yet to be merged.</p>
<h2 id="modesetting-without-glamor-on-rpi">Modesetting without Glamor on
RPi</h2>
<p>Christopher Michael joined the Graphics Team in 2022 and along with
Chema Casanova made some key contributions to enabling hardware
acceleration and mode setting on the Raspberry Pi without the use of <a
href="https://www.freedesktop.org/wiki/Software/Glamor/">Glamor</a>
which allows making more video memory available to graphics applications
running on a Raspberry Pi.</p>
<p>The older generation Raspberry Pis (1-3) only have a maximum of 256MB
of memory available for video memory, and using Glamor will consume part
of that video memory. Christopher wrote an excellent <a
href="https://blogs.igalia.com/cmichael/2022/05/30/modesetting-a-glamor-less-rpi-adventure/">blog
post</a> on this work. Both him and Chema also had a joint presentation
at XDC 2022 going into more detail on this work.</p>
<h2 id="linux-format-magazine-column">Linux Format Magazine Column</h2>
<p>Our very own Samuel Iglesias had a column published in Linux Format
Magazine. It’s a short column about reaching Vulkan 1.1 conformance for
v3dv & Turnip Vulkan drivers, and how Open-Source GPU drivers can go
from a “hobby project” to the defacto driver for the platform. Check it
out on page 7 of <a
href="https://linuxformat.com/linux-format-288.html">issue #288</a>!</p>
<h2 id="xdc-2022">XDC 2022</h2>
<p>X.Org Developers Conference is one of the big conferences for us here
at the Graphics Team. Last year at XDC 2022 our Team presented 5 talks
in Minneapolis, Minnesota. XDC 2022 took place towards the end of the
year in October, so it provides some good context on how the team closed
out the year. If you didn’t attend or missed their presentation, here’s
a breakdown:</p>
<h3
id="replacing-the-geometry-pipeline-with-mesh-shaders-ricardo-garcía"><a
href="https://indico.freedesktop.org/event/2/contributions/48/">“Replacing
the geometry pipeline with mesh shaders”</a> (Ricardo García)</h3>
<p>Ricardo presents what exactly mesh shaders are in Vulkan. He made
many contributions to this extension including writing 1000s of CTS
tests for this extension with a <a
href="https://rg3.name/202210222107.html">blog post</a> on his
presentation that should check out!</p>
<p><div class="youtube-video"><iframe src="https://www.youtube.com/embed/aRNJ4xj_nDs"></iframe></div></p>
<h3 id="status-of-vulkan-on-raspberry-pi-iago-toral"><a
href="https://indico.freedesktop.org/event/2/contributions/68/">“Status
of Vulkan on Raspberry Pi”</a> (Iago Toral)</h3>
<p>Iago goes into detail about the current status of the Raspberry Pi
Vulkan driver. He talks about achieving Vulkan 1.2 conformance, as well
as some of the challenges the team had to solve due to hardware
limitations of the Broadcom GPU.</p>
<p><div class="youtube-video"><iframe src="https://www.youtube.com/embed/GM9IojyzCVM"></iframe></div></p>
<h3
id="enable-hardware-acceleration-for-gl-applications-without-glamor-on-xorg-modesetting-driver-jose-maría-casanova-christopher-michael"><a
href="https://indico.freedesktop.org/event/2/contributions/60/">“Enable
hardware acceleration for GL applications without Glamor on Xorg
modesetting driver”</a> (Jose María Casanova, Christopher Michael)</h3>
<p>Chema and Christopher talk about the challenges they had to solve to
enable hardware acceleration on the Raspberry Pi without Glamor.</p>
<p><div class="youtube-video"><iframe src="https://www.youtube.com/embed/Bo_MOM7JTeQ"></iframe></div></p>
<h3 id="im-not-an-amd-expert-but-melissa-wen"><a
href="https://indico.freedesktop.org/event/2/contributions/50/">“I’m not
an AMD expert, but…”</a> (Melissa Wen)</h3>
<p>In this non-technical presentation, Melissa talks about techniques
developers can use to understand and debug drivers without access to
hardware documentation.</p>
<p><div class="youtube-video"><iframe src="https://www.youtube.com/embed/CMm-yhsMB7U"></iframe></div></p>
<h3 id="async-page-flip-in-atomic-api-andré-almeida"><a
href="https://indico.freedesktop.org/event/2/contributions/61/">“Async
page flip in atomic API”</a> (André Almeida)</h3>
<p>André talks about the work that has been done to enable asynchronous
page flipping in DRM’s atomic API with an introduction to the topic by
explaining about what exactly is asynchronous page flip, and why you
would want it.</p>
<p><div class="youtube-video"><iframe src="https://www.youtube.com/embed/qayPPIfrqtE"></iframe></div></p>
<h2 id="fosdem-2022">FOSDEM 2022</h2>
<p>Another important conference for us is FOSDEM, and last year we
presented 3 of the 5 talks in the graphics dev room. FOSDEM took place
in early February 2022, these talks provide some good context of where
the team started in 2022.</p>
<h3 id="the-status-of-turnip-driver-development-hyunjun-ko"><a
href="https://archive.fosdem.org/2022/schedule/event/turnip/">The status
of Turnip driver development</a> (Hyunjun Ko)</h3>
<p>Hyunjun presented the current state of the Turnip driver, also
talking about the difficulties of developing a driver for a platform
without hardware documentation. He talks about how Turnip developers
reverse engineer the behaviour of the hardware, and then implement that
in an open-source driver. He also made a companion <a
href="https://blogs.igalia.com/zzoon/graphics/mesa/2022/02/21/complement-story/">blog
post</a> to checkout along with his presentation.</p>
<h3
id="v3dv-status-update-for-open-source-vulkan-driver-for-raspberry-pi-4-alejandro-piñeiro"><a
href="https://archive.fosdem.org/2022/schedule/event/v3dv/">v3dv: Status
Update for Open Source Vulkan Driver for Raspberry Pi 4</a> (Alejandro
Piñeiro)</h3>
<p>Igalia has been presenting the status of the v3dv driver since
December 2019 and in this presentation, Alejandro talks about the status
of the v3dv driver in early 2022. He talks about achieving conformance,
the extensions that had to be implemented, and the future plans of the
v3dv driver.</p>
<h3 id="fun-with-border-colors-in-vulkan-ricardo-garcia"><a
href="https://archive.fosdem.org/2022/schedule/event/vulkan_borders/">Fun
with border colors in Vulkan</a> (Ricardo Garcia)</h3>
<p>Ricardo presents about the work he did on the
<code>VK_EXT_border_color_swizzle</code> extension in Vulkan. He talks
about the specific contributions he did and how the extension fits in
with sampling color operations in Vulkan.</p>
<h2 id="gsoc-igalia-ce">GSoC & Igalia CE</h2>
<p>Last year Melissa & André co-mentored contributors working on
introducing KUnit tests to the AMD display driver. This project was
hosted as a <a href="https://summerofcode.withgoogle.com/">“Google
Summer of Code” (GSoC)</a> project from the X.Org Foundation. If you’re
interested in seeing their work Tales da Aparecida, Maíra Canal, Magali
Lemes, and Isabella Basso presented their work at the <a
href="https://lpc.events/event/16/contributions/1310/">Linux Plumbers
Conference 2022</a> and across two talks at XDC 2022. Here you can see
their <a
href="https://indico.freedesktop.org/event/2/contributions/65/">first</a>
presentation and here you can see their <a
href="https://indico.freedesktop.org/event/2/contributions/164/">second</a>
second presentation.</p>
<p>André & Melissa also mentored two <a
href="https://www.igalia.com/coding-experience/">“Igalia Coding
Experience” (CE)</a> projects, one related to IGT GPU test tools on the
VKMS kernel driver, and the other for IGT GPU test tools on the V3D
kernel driver. If you’re interested in reading up on some of that work,
Maíra Canal <a
href="https://mairacanal.github.io/january-update-finishing-my-igalia-ce/">wrote
about her experience</a> being part of the Igalia CE.</p>
<p>Ella Stanforth was also part of the Igalia Coding Experience, being
mentored by Iago & Alejandro. They worked on the
<code>VK_KHR_sampler_ycbcr_conversion</code> extension for the v3dv
driver. Alejandro talks about their work in his <a
href="https://blogs.igalia.com/apinheiro/2023/01/v3dv-status-update-2023-01/">blog
post here</a>.</p>
<h1 id="whats-next">What’s Next?</h1>
<p>The graphics team is looking forward to having a jam-packed 2023 with
just as many if not more contributions to the Open-Source graphics
stack! I’m super excited to be part of the team, and hope to see my name
in our 2023 recap post!</p>
<p>Also, you might have heard that <a
href="https://www.igalia.com/2022/xdc-2023">Igalia will be hosting XDC
2023</a> in the beautiful city of A Coruña! We hope to see you there
where there will be many presentations from all the great people working
on the Open-Source graphics stack, and most importantly where you can <a
href="https://www.youtube.com/watch?v=7hWcu8O9BjM">dream in the
Atlantic!</a></p>
<figure>
<img src="https://www.igalia.com/assets/i/news/XDC-event-banner.jpg"
alt="Photo of A Coruña" />
<figcaption aria-hidden="true">Photo of A Coruña</figcaption>
</figure>
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