Release highlights of AMDGPU 1.1.0 include support for the upcoming Polaris 10 and 11 family of AMD GPUs, makes the OpenGL and VDPAU (Video Decode and Presentation API for Unix) interoperation to work with DRI3 enabled, add the "TearFree" option to prevent tearing with reflection and rotation under X.Org Server 1.16 or later.
The RandR CRTC transformations have been optimized and it should work as expected, with the exception of tearing, which can't be prevented even with the "TearFree" option mentioned above. Also, it looks like RandR's primary output is always marked as 'primary'.
Additionally, the RandR 1.4 provider name isn't hardcoded to "amdgpu" anymore, instead it's now built from the aMD GPU chipset bus ID and name. Thanks to this change, it is now possible to distinguish several graphics cards, which are supported by the AMDGPU driver, by name.