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| author |   Chris Wilson <chris@chris-wilson.co.uk> | 2016-10-14 13:18:18 +0100 |
|---|---|---|
| committer |   Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-10-17 08:19:57 +0200 |
| commit | 0853695c3ba46f97dfc0b5885f7b7e640ca212dd (patch) | |
| tree | 6c8c3cbeb836094cb0e45b60a19c7e4419a3f4c2 /drivers/gpu/drm/atmel-hlcdc | |
| parent | drm/crtc: constify drm_crtc_mask parameter (diff) | |
| download | linux-dev-0853695c3ba46f97dfc0b5885f7b7e640ca212dd.tar.xz linux-dev-0853695c3ba46f97dfc0b5885f7b7e640ca212dd.zip | |
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
Diffstat (limited to 'drivers/gpu/drm/atmel-hlcdc')
| -rw-r--r-- | drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c index 5f484310bee9..9f6222895212 100644 --- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c +++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c @@ -464,7 +464,7 @@ atmel_hlcdc_dc_atomic_complete(struct atmel_hlcdc_dc_commit *commit) drm_atomic_helper_cleanup_planes(dev, old_state); - drm_atomic_state_free(old_state); + drm_atomic_state_put(old_state); /* Complete the commit, wake up any waiter. */ spin_lock(&dc->commit.wait.lock); @@ -521,6 +521,7 @@ static int atmel_hlcdc_dc_atomic_commit(struct drm_device *dev, /* Swap the state, this is the point of no return. */ drm_atomic_helper_swap_state(state, true); + drm_atomic_state_get(state); if (async) queue_work(dc->wq, &commit->work); else |