From: Dave Airlie <airlied@xxxxxxxxxx>
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.
Signed-off-by: Dave Airlie <airlied@xxxxxxxxxx>
---
drivers/gpu/drm/drm_atomic.c | 4 ++++
drivers/gpu/drm/drm_atomic_helper.c | 5 +++++
2 files changed, 9 insertions(+)
diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index 9d5e3c8..91cae88 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -1160,6 +1160,8 @@ drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state,
{
struct drm_crtc_state *crtc_state;
+ if (crtc)
+ drm_connector_reference(conn_state->connector);
if (conn_state->crtc && conn_state->crtc != crtc) {
crtc_state = drm_atomic_get_existing_crtc_state(conn_state->state,
conn_state->crtc);
@@ -1177,6 +1179,8 @@ drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state,
1 << drm_connector_index(conn_state->connector);
}
+ if (conn_state->crtc)
+ drm_connector_unreference(conn_state->connector);
conn_state->crtc = crtc;
if (crtc)
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index d25abce..f3e2642 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -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 +2891,9 @@ __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 (connector && state->crtc) {
+ drm_connector_unreference(state->connector);
+ }
}
EXPORT_SYMBOL(__drm_atomic_helper_connector_destroy_state);
--
2.5.5
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