Nouveau Support For ETC2/ASTC Texture Compression
On NVIDIA hardware, Mirkin notes that ETC2 and ASTC patch works for the GK20A (the Kepler-based GPU in the Tegra K1 SoC) and the GM107 Maxwell GeForce GTX 750 series.
ETC2 and ASTC are two popular texture compression alternatives to the patent-troubled S3TC. Adaptive Scalable Texture Compression (ASTC) has been an extension for OpenGL and OpenGL ES since 2012 and is also found in the Direct3D world too. Ericsson Texture Compression 2 is mandated by OpenGL ES 3.0 and OpenGL 4.3.
The Nouveau patch for ETC2/ASTC on supported hardware can currently be found on the Nouveau mailing list but will hopefully be found in Mesa Git soon enough.