# Licenses

SteamOS ARM Port (which includes work from MaSi's SteamOS-ARM-SM8550) is a Linux
distribution made up of many open-source components. Each component is provided under its own license.

## Project software

Original software and scripts developed for SteamOS-ARM-SM8550, and the
SM8650 additions in this repository, are licensed under the terms of the
[GNU GPL Version 2](https://www.gnu.org/licenses/old-licenses/gpl-2.0.html).

Vendor trees keep their own licenses (Linux kernel GPL-2.0, Decky plugins
GPL-3.0-or-later, gamescope BSD-2-Clause, and others). See [`CREDITS.md`](CREDITS.md).

## lsfg-vk

The ARM64 frame generation layer (`sm8650-overlay/usr/lib/liblsfg-vk-layer-arm64.so`)
is lsfg-vk 2.0 by PancakeTAS (https://lsfg-vk.dev), compiled for aarch64 from
the official source with no code changes. It is licensed under
[CC BY-NC-ND 4.0](sm8650-overlay/usr/share/licenses/lsfg-vk/LICENSE.txt), not
under this project's license: it may be shared free of charge and unmodified,
with credit, and not used commercially. Only its Vulkan layer manifest is
renamed (`VK_LAYER_LSFGVK_frame_generation_arm64`) so it can sit next to the
plugin's x86 layer. Lossless Scaling itself is sold separately on Steam and is
not included.

## Valve SteamOS and Steam

Steam, SteamOS, Steam Deck, and related marks are trademarks of Valve
Corporation. Official SteamOS userspace and the Steam client remain subject
to Valve's terms. This repository does **not** redistribute the official
SteamOS root filesystem or Steam client binaries.