drm/i915/fbdev: Limit the global async-domain synchronization
authorChris Wilson <chris@chris-wilson.co.uk>
Tue, 21 Jun 2016 08:16:54 +0000 (09:16 +0100)
committerChris Wilson <chris@chris-wilson.co.uk>
Tue, 21 Jun 2016 08:36:33 +0000 (09:36 +0100)
commit43cee314345ac9e34e744f8c335150a17ff9a6fb
tree62f0ddd113a9463c31997dd0f1cd09cf82ea7365
parentd626f34573551479f62b09d4df09efc4af88136d
drm/i915/fbdev: Limit the global async-domain synchronization

During cleanup we have to synchronise with the async task we are using
to initialise and register our fbdev. Currently, we are using a full
synchronisation on the global domain, but we can restrict this to just
synchronising up to our task if we remember our cookie.

Whilst there, streamline the function parameters.

v2: async_synchronize_cookie() takes an exclusive upper bound, to
synchronize with our task we have to pass in the next cookie.
v3: Drop premature disregarding of the active cookie (we need to wait
until the task is complete before continuing in the teardown).
v4: Refactor waiting on async to incorporate a comment explaining why we
need the +1.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Lukas Wunner <lukas@wunner.de>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1466497015-8509-2-git-send-email-chris@chris-wilson.co.uk
drivers/gpu/drm/i915/intel_drv.h
drivers/gpu/drm/i915/intel_fbdev.c