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nixos/doc/manual: add chapter on VA-API

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David McFarland 2022-12-06 09:42:02 -04:00
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34
nixos/doc/manual/configuration/gpu-accel.chapter.md
View File

@ -159,6 +159,40 @@ environment.variables.VK_ICD_FILENAMES =
"/run/opengl-driver/share/vulkan/icd.d/radeon_icd.x86_64.json";
```
## VA-API {#sec-gpu-accel-va-api}
[VA-API (Video Acceleration API)](https://www.intel.com/content/www/us/en/developer/articles/technical/linuxmedia-vaapi.html)
is an open-source library and API specification, which provides access to
graphics hardware acceleration capabilities for video processing.
VA-API drivers are loaded by `libva`. The version in nixpkgs is built to search
the opengl driver path, so drivers can be installed in
[](#opt-hardware.opengl.extraPackages).
VA-API can be tested using:
```ShellSession
$ nix-shell -p libva-utils --run vainfo
```
### Intel {#sec-gpu-accel-va-api-intel}
Modern Intel GPUs use the iHD driver, which can be installed with:
```nix
hardware.opengl.extraPackages = [
intel-media-driver
];
```
Older Intel GPUs use the i965 driver, which can be installed with:
```nix
hardware.opengl.extraPackages = [
vaapiIntel
];
```
## Common issues {#sec-gpu-accel-common-issues}
### User permissions {#sec-gpu-accel-common-issues-permissions}

42
nixos/doc/manual/from_md/configuration/gpu-accel.chapter.xml
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@ -177,6 +177,48 @@ environment.variables.AMD_VULKAN_ICD = "RADV";
# Or
environment.variables.VK_ICD_FILENAMES =
"/run/opengl-driver/share/vulkan/icd.d/radeon_icd.x86_64.json";
</programlisting>
</section>
</section>
<section xml:id="sec-gpu-accel-va-api">
<title>VA-API</title>
<para>
<link xlink:href="https://www.intel.com/content/www/us/en/developer/articles/technical/linuxmedia-vaapi.html">VA-API
(Video Acceleration API)</link> is an open-source library and API
specification, which provides access to graphics hardware
acceleration capabilities for video processing.
</para>
<para>
VA-API drivers are loaded by <literal>libva</literal>. The version
in nixpkgs is built to search the opengl driver path, so drivers
can be installed in
<xref linkend="opt-hardware.opengl.extraPackages" />.
</para>
<para>
VA-API can be tested using:
</para>
<programlisting>
$ nix-shell -p libva-utils --run vainfo
</programlisting>
<section xml:id="sec-gpu-accel-va-api-intel">
<title>Intel</title>
<para>
Modern Intel GPUs use the iHD driver, which can be installed
with:
</para>
<programlisting language="bash">
hardware.opengl.extraPackages = [
intel-media-driver
];
</programlisting>
<para>
Older Intel GPUs use the i965 driver, which can be installed
with:
</para>
<programlisting language="bash">
hardware.opengl.extraPackages = [
vaapiIntel
];
</programlisting>
</section>
</section>