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authorChris Wilson <chris@chris-wilson.co.uk>2016-10-14 13:18:18 +0100
committerDaniel Vetter <daniel.vetter@ffwll.ch>2016-10-17 08:19:57 +0200
commit0853695c3ba46f97dfc0b5885f7b7e640ca212dd (patch)
tree6c8c3cbeb836094cb0e45b60a19c7e4419a3f4c2 /drivers/gpu/vga/vgaarb.c
parent1dfdb0ed34b28b086ffc1f9fb9f538ab60298029 (diff)
drm: Add reference counting to drm_atomic_state
drm_atomic_state has a complicated single owner model that tracks the single reference from allocation through to destruction on another thread - or perhaps on a local error path. We can simplify this tracking by using reference counting (at a cost of a few more atomics). This is even more beneficial when the lifetime of the state becomes more convoluted than being passed to a single worker thread for the commit. v2: Double check !intel atomic_commit functions for missing gets v3: Update kerneldocs Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: dri-devel@lists.freedesktop.org Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com> Reviewed-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20161014121833.439-27-chris@chris-wilson.co.uk
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