[Intel-gfx] [PATCH] drm/i915: Return a mask of the active rings in the high word of busy_ioctl

[Chris Wilson]

On Wed,  4 Jul 2012 12:25:08 +0100, Chris Wilson <chris at chris-wilson.co.uk> wrote:
> The intention is to help select which engine to use for copies with
> interoperating clients - such as a GL client making a request to the X
> server to perform a SwapBuffers, which may require copying from the
> active GL back buffer to the X front buffer.

We choose to report a mask of the active rings to future proof the
interface against any changes which may allow for the object to reside
upon multiple rings.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre