Add bridge connector_attach/detach ops. These ops are called when a
bridge is attached or detached to a drm_connector. These ops can be
used to register and unregister an HDMI CEC adapter for a bridge that
supports CEC.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
---
drivers/gpu/drm/drm_bridge_connector.c | 25 +++++++++++++++++++++++-
include/drm/drm_bridge.h | 27 ++++++++++++++++++++++++++
2 files changed, 51 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_bridge_connector.c b/drivers/gpu/drm/drm_bridge_connector.c
index 791379816837..0676677badfe 100644
--- a/drivers/gpu/drm/drm_bridge_connector.c
+++ b/drivers/gpu/drm/drm_bridge_connector.c
@@ -203,6 +203,11 @@ static void drm_bridge_connector_destroy(struct drm_connector *connector)
{
struct drm_bridge_connector *bridge_connector =
to_drm_bridge_connector(connector);
+ struct drm_bridge *bridge;
+
+ drm_for_each_bridge_in_chain(bridge_connector->encoder, bridge)
+ if (bridge->funcs->connector_detach)
+ bridge->funcs->connector_detach(bridge, connector);
if (bridge_connector->bridge_hpd) {
struct drm_bridge *hpd = bridge_connector->bridge_hpd;
@@ -318,6 +323,7 @@ struct drm_connector *drm_bridge_connector_init(struct drm_device *drm,
struct i2c_adapter *ddc = NULL;
struct drm_bridge *bridge;
int connector_type;
+ int ret;
bridge_connector = kzalloc(sizeof(*bridge_connector), GFP_KERNEL);
if (!bridge_connector)
@@ -375,6 +381,23 @@ struct drm_connector *drm_bridge_connector_init(struct drm_device *drm,
connector->polled = DRM_CONNECTOR_POLL_CONNECT
| DRM_CONNECTOR_POLL_DISCONNECT;
- return connector;
+ ret = 0;
+ /* call connector_attach for all bridges */
+ drm_for_each_bridge_in_chain(encoder, bridge) {
+ if (!bridge->funcs->connector_attach)
+ continue;
+ ret = bridge->funcs->connector_attach(bridge, connector);
+ if (ret)
+ break;
+ }
+ if (!ret)
+ return connector;
+
+ /* on error, detach any previously successfully attached connectors */
+ list_for_each_entry_continue_reverse(bridge, &(encoder)->bridge_chain,
+ chain_node)
+ if (bridge->funcs->connector_detach)
+ bridge->funcs->connector_detach(bridge, connector);
+ return ERR_PTR(ret);
}
EXPORT_SYMBOL_GPL(drm_bridge_connector_init);
diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h
index 2195daa289d2..333fbc3a03e9 100644
--- a/include/drm/drm_bridge.h
+++ b/include/drm/drm_bridge.h
@@ -629,6 +629,33 @@ struct drm_bridge_funcs {
* the DRM_BRIDGE_OP_HPD flag in their &drm_bridge->ops.
*/
void (*hpd_disable)(struct drm_bridge *bridge);
+
+ /**
+ * @connector_attach:
+ *
+ * This callback is invoked whenever our bridge is being attached to a
+ * &drm_connector. This is where an HDMI CEC adapter can be registered.
+ *
+ * The @connector_attach callback is optional.
+ *
+ * RETURNS:
+ *
+ * Zero on success, error code on failure.
+ */
+ int (*connector_attach)(struct drm_bridge *bridge,
+ struct drm_connector *conn);
+
+ /**
+ * @connector_detach:
+ *
+ * This callback is invoked whenever our bridge is being detached from a
+ * &drm_connector. This is where an HDMI CEC adapter can be
+ * unregistered.
+ *
+ * The @connector_detach callback is optional.
+ */
+ void (*connector_detach)(struct drm_bridge *bridge,
+ struct drm_connector *conn);
};
/**
--
2.30.2
_______________________________________________
dri-devel mailing list
dri-devel@xxxxxxxxxxxxxxxxxxxxx
https://lists.freedesktop.org/mailman/listinfo/dri-devel
