Shim for the Tegra-specific version of libdrm that brings in that copy of the shared library at runtime.
In Yocto/OE builds, many graphics programs link (either directly or indirectly) against libdrm, and that library is expected to work in an emulated environment (for gobject-introspection, etc.).
However, the Tegra-specific libdrm links against other Tegra-specific libraries and will cause a segfault when used under QEMU.
This library checks the runtime environment during its
initialization, and only maps in the NVIDIA binary if
the /dev/nvhost-nvdec device is present. Otherwise,
the stub routines in ths shim return error or null values
for all functions.
Note that while the shim advertises its version as 2.4.96 in its pkgconfig file, it only implements function vectors for the functions provided by NVIDIA in their stripped-down libdrm.
All sources are released under the MIT license. See the LICENSE file for the license text.
The xf86drm.h, xf86drmMode.h, libsync.h, and nouveau_drm.h header files are adapted or copied from libdrm, which is also MIT-licensed. See those header files for the original license text.
The master branch is used for ongoing development. The l4t-r28.2 branch shims the API provided in the Linux for Tegra R28.2.x releases.