[Intel-gfx] [PATCH 03/10] drm/i915/bdw: implement semaphore signal

From: Ben Widawsky b...@bwidawsk.net Semaphore signalling works similarly to previous GENs with the exception that the per ring mailboxes no longer exist. Instead you must define your own space, somewhere in the GTT. The comments in the code define the layout I've opted for, which should be

[Intel-gfx] [PATCH 03/10] drm/i915/bdw: implement semaphore signal

Semaphore signalling works similarly to previous GENs with the exception that the per ring mailboxes no longer exist. Instead you must define your own space, somewhere in the GTT. The comments in the code define the layout I've opted for, which should be fairly future proof. Ie. I tried to define