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@xs4all.nl --- 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); };
/**