From: Chris Wilson Date: Wed, 4 Jul 2012 11:25:08 +0000 (+0100) Subject: drm/i915: Return a mask of the active rings in the high word of busy_ioctl X-Git-Tag: omap-for-v3.7-rc1/fixes-cpufreq-signed~20^2~61^2~44 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e9808edd98679680804dfbc42c5ee8f1aa91f617;p=pandora-kernel.git drm/i915: Return a mask of the active rings in the high word of busy_ioctl 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. Signed-off-by: Chris Wilson [danvet: bikeshed away the write ring mask and add the explanation Chris sent in a follow-up mail why we decided to use masks.] Signed-off-by: Daniel Vetter --- Reading git-diff-tree failed