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Panfrost
========
The Panfrost driver stack includes an OpenGL ES implementation for Arm Mali
GPUs based on the Midgard and Bifrost microarchitectures. It is **conformant**
on `Mali-G52 <https://www.khronos.org/conformance/adopters/conformant-products/opengles#submission_949>`_
and `Mali-G57 <https://www.khronos.org/conformance/adopters/conformant-products/opengles#submission_980>`_
but **non-conformant** on other GPUs. The following hardware is currently
supported:
+--------------------+---------------+-----------+--------+
| Models | Architecture | OpenGL ES | OpenGL |
+====================+===============+===========+========+
| T600, T620, T720 | Midgard (v4) | 2.0 | 2.1 |
+--------------------+---------------+-----------+--------+
| T760, T820, T830 | Midgard (v5) | 3.1 | 3.1 |
| T860, T880 | | | |
+--------------------+---------------+-----------+--------+
| G72 | Bifrost (v6) | 3.1 | 3.1 |
+--------------------+---------------+-----------+--------+
| G31, G51, G52, G76 | Bifrost (v7) | 3.1 | 3.1 |
+--------------------+---------------+-----------+--------+
| G57 | Valhall (v9) | 3.1 | 3.1 |
+--------------------+---------------+-----------+--------+
| G310, G610 | Valhall (v10) | 3.1 | 3.1 |
+--------------------+---------------+-----------+--------+
Other Midgard and Bifrost chips (e.g. G71) are not yet supported.
Older Mali chips based on the Utgard architecture (Mali-400, Mali-450) are
supported in the :doc:`Lima <lima>` driver, not Panfrost. Lima is also
available in Mesa.
Other graphics APIs (Vulkan, OpenCL) are not supported at this time.
Building
--------
Panfrost's OpenGL support is a Gallium driver. Since Mali GPUs are 3D-only and
do not include a display controller, Mesa uses kmsro to support display
controllers paired with Mali GPUs. If your board with a Panfrost supported GPU
has a display controller with mainline Linux support not supported by kmsro,
it's easy to add support, see the commit ``cff7de4bb597e9`` as an example.
LLVM is *not* required by Panfrost's compilers. LLVM support in Mesa can
safely be disabled for most OpenGL ES users with Panfrost.
Build like ``meson . build/ -Dvulkan-drivers=
-Dgallium-drivers=panfrost -Dllvm=disabled`` for a build directory
``build``.
For general information on building Mesa, read :doc:`the install documentation
<../install>`.
Chat
----
Panfrost developers and users hang out on IRC at ``#panfrost`` on OFTC. Note
that registering and authenticating with ``NickServ`` is required to prevent
spam. `Join the chat. <https://webchat.oftc.net/?channels=panfrost>`_
Technical details
-----------------
You can read more technical details about Panfrost here:
.. toctree::
:glob:
panfrost/*
|
