drm/dp-mst-helper: Remove hotplug callback

When everyone implements it exactly the same way, among all 4
implementations, there's not really a need to overwrite this at all.

Aside: drm_kms_helper_hotplug_event is pretty much core functionality
at this point. Probably should move it there.
Reviewed-by: Lyude Paul <lyude@redhat.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181128221234.15054-1-daniel.vetter@ffwll.ch

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c

@@ -396,14 +396,6 @@ static void dm_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 	drm_connector_put(connector);
 }
 
-static void dm_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
-{
-	struct amdgpu_dm_connector *master = container_of(mgr, struct amdgpu_dm_connector, mst_mgr);
-	struct drm_device *dev = master->base.dev;
-
-	drm_kms_helper_hotplug_event(dev);
-}
-
 static void dm_dp_mst_register_connector(struct drm_connector *connector)
 {
 	struct drm_device *dev = connector->dev;
@@ -420,7 +412,6 @@ static void dm_dp_mst_register_connector(struct drm_connector *connector)
 static const struct drm_dp_mst_topology_cbs dm_mst_cbs = {
 	.add_connector = dm_dp_add_mst_connector,
 	.destroy_connector = dm_dp_destroy_mst_connector,
-	.hotplug = dm_dp_mst_hotplug,
 	.register_connector = dm_dp_mst_register_connector
 };
 

drivers/gpu/drm/drm_dp_mst_topology.c

@@ -33,6 +33,7 @@
 #include <drm/drm_fixed.h>
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc_helper.h>
 
 /**
  * DOC: dp mst helper
@@ -1639,7 +1640,7 @@ static void drm_dp_send_link_address(struct drm_dp_mst_topology_mgr *mgr,
 			for (i = 0; i < txmsg->reply.u.link_addr.nports; i++) {
 				drm_dp_add_port(mstb, mgr->dev, &txmsg->reply.u.link_addr.ports[i]);
 			}
-			(*mgr->cbs->hotplug)(mgr);
+			drm_kms_helper_hotplug_event(mgr->dev);
 		}
 	} else {
 		mstb->link_address_sent = false;
@@ -2412,7 +2413,7 @@ static int drm_dp_mst_handle_up_req(struct drm_dp_mst_topology_mgr *mgr)
 			drm_dp_update_port(mstb, &msg.u.conn_stat);
 
 			DRM_DEBUG_KMS("Got CSN: pn: %d ldps:%d ddps: %d mcs: %d ip: %d pdt: %d\n", msg.u.conn_stat.port_number, msg.u.conn_stat.legacy_device_plug_status, msg.u.conn_stat.displayport_device_plug_status, msg.u.conn_stat.message_capability_status, msg.u.conn_stat.input_port, msg.u.conn_stat.peer_device_type);
-			(*mgr->cbs->hotplug)(mgr);
+			drm_kms_helper_hotplug_event(mgr->dev);
 
 		} else if (msg.req_type == DP_RESOURCE_STATUS_NOTIFY) {
 			drm_dp_send_up_ack_reply(mgr, mgr->mst_primary, msg.req_type, seqno, false);
@@ -3109,7 +3110,7 @@ static void drm_dp_destroy_connector_work(struct work_struct *work)
 		send_hotplug = true;
 	}
 	if (send_hotplug)
-		(*mgr->cbs->hotplug)(mgr);
+		drm_kms_helper_hotplug_event(mgr->dev);
 }
 
 static struct drm_private_state *

drivers/gpu/drm/i915/intel_dp_mst.c

@@ -517,20 +517,10 @@ static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 	drm_connector_put(connector);
 }
 
-static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
-{
-	struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
-	struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
-	struct drm_device *dev = intel_dig_port->base.base.dev;
-
-	drm_kms_helper_hotplug_event(dev);
-}
-
 static const struct drm_dp_mst_topology_cbs mst_cbs = {
 	.add_connector = intel_dp_add_mst_connector,
 	.register_connector = intel_dp_register_mst_connector,
 	.destroy_connector = intel_dp_destroy_mst_connector,
-	.hotplug = intel_dp_mst_hotplug,
 };
 
 static struct intel_dp_mst_encoder *

drivers/gpu/drm/nouveau/dispnv50/disp.c

@@ -1055,13 +1055,6 @@ nv50_mstm_prepare(struct nv50_mstm *mstm)
 	}
 }
 
-static void
-nv50_mstm_hotplug(struct drm_dp_mst_topology_mgr *mgr)
-{
-	struct nv50_mstm *mstm = nv50_mstm(mgr);
-	drm_kms_helper_hotplug_event(mstm->outp->base.base.dev);
-}
-
 static void
 nv50_mstm_destroy_connector(struct drm_dp_mst_topology_mgr *mgr,
 			    struct drm_connector *connector)
@@ -1113,7 +1106,6 @@ nv50_mstm = {
 	.add_connector = nv50_mstm_add_connector,
 	.register_connector = nv50_mstm_register_connector,
 	.destroy_connector = nv50_mstm_destroy_connector,
-	.hotplug = nv50_mstm_hotplug,
 };
 
 void

drivers/gpu/drm/radeon/radeon_dp_mst.c

@@ -320,19 +320,10 @@ static void radeon_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
 	DRM_DEBUG_KMS("\n");
 }
 
-static void radeon_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
-{
-	struct radeon_connector *master = container_of(mgr, struct radeon_connector, mst_mgr);
-	struct drm_device *dev = master->base.dev;
-
-	drm_kms_helper_hotplug_event(dev);
-}
-
 static const struct drm_dp_mst_topology_cbs mst_cbs = {
 	.add_connector = radeon_dp_add_mst_connector,
 	.register_connector = radeon_dp_register_mst_connector,
 	.destroy_connector = radeon_dp_destroy_mst_connector,
-	.hotplug = radeon_dp_mst_hotplug,
 };
 
 static struct

include/drm/drm_dp_mst_helper.h

@@ -387,8 +387,6 @@ struct drm_dp_mst_topology_cbs {
 	void (*register_connector)(struct drm_connector *connector);
 	void (*destroy_connector)(struct drm_dp_mst_topology_mgr *mgr,
 				  struct drm_connector *connector);
-	void (*hotplug)(struct drm_dp_mst_topology_mgr *mgr);
-
 };
 
 #define DP_MAX_PAYLOAD (sizeof(unsigned long) * 8)