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drm/atomic: use connector references (v3)

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Take a reference when setting a crtc on a connecter,
also take one when duplicating if a crtc is set,
and drop one on destroy if a crtc is set.

v2: take Daniel Stone's advice and simplify the
ref/unref dances, also take care of NULL as connector
to state reset.

v3: remove need for connector NULL check.

Reviewed-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie
2016-04-27 11:27:39 +10:00
parent 0955c1250e
commit d2307dea14
2 changed files with 9 additions and 9 deletions
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4
drivers/gpu/drm/drm_atomic_helper.c
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@@ -2762,6 +2762,8 @@ __drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector,
struct drm_connector_state *state)
{
memcpy(state, connector->state, sizeof(*state));
if (state->crtc)
drm_connector_reference(connector);
}
EXPORT_SYMBOL(__drm_atomic_helper_connector_duplicate_state);
@@ -2889,6 +2891,8 @@ __drm_atomic_helper_connector_destroy_state(struct drm_connector *connector,
* state will automatically do the right thing if code is ever added
* to this function.
*/
if (state->crtc)
drm_connector_unreference(state->connector);
}
EXPORT_SYMBOL(__drm_atomic_helper_connector_destroy_state);