RadeonSI Gallium3D Re-Enables SDMA For Sea Islands, Carrizo

The latest Mesa Git code has re-enabled SDMA support in the RadeonSI Gallium3D driver for Sea Islands and Carrizo hardware.

The SDMA texture copying support was previously disabled as it was reported to be "very broken" for some users and the Sea Islands SDMA support needed more testing. With the latest Git code, however, it's believed all issues should be addressed and thus is re-enabled.

The code landed in Git this morning. SDMA texture copying can potentially increase performance, more details via this earlier article when the SDMA support landed in Mesa a few months back for the open-source AMD driver stack.