commit c8a3b2ae07130042682bc8e031bcfbae3754463d
author Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Fri Feb 26 11:51:06 2016 +0200
committer Thierry Reding <treding@nvidia.com> Wed Mar 02 17:31:03 2016 +0100
tree 6594793d6229f8cacbba4667d80000eb1abee438
parent 06a9dc65afbd9d9e81ee6352a13f968e0540237e

drm/bridge: Make (pre/post) enable/disable callbacks optional

Instead of forcing bridges to implement empty callbacks make them all
optional.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

drivers/gpu/drm/drm_bridge.c

diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c
index bd93453..b365440 100644
--- a/drivers/gpu/drm/drm_bridge.c
+++ b/drivers/gpu/drm/drm_bridge.c
@@ -186,7 +186,8 @@
 
 	drm_bridge_disable(bridge->next);
 
-	bridge->funcs->disable(bridge);
+	if (bridge->funcs->disable)
+		bridge->funcs->disable(bridge);
 }
 EXPORT_SYMBOL(drm_bridge_disable);
 
@@ -206,7 +207,8 @@
 	if (!bridge)
 		return;
 
-	bridge->funcs->post_disable(bridge);
+	if (bridge->funcs->post_disable)
+		bridge->funcs->post_disable(bridge);
 
 	drm_bridge_post_disable(bridge->next);
 }
@@ -256,7 +258,8 @@
 
 	drm_bridge_pre_enable(bridge->next);
 
-	bridge->funcs->pre_enable(bridge);
+	if (bridge->funcs->pre_enable)
+		bridge->funcs->pre_enable(bridge);
 }
 EXPORT_SYMBOL(drm_bridge_pre_enable);
 
@@ -276,7 +279,8 @@
 	if (!bridge)
 		return;
 
-	bridge->funcs->enable(bridge);
+	if (bridge->funcs->enable)
+		bridge->funcs->enable(bridge);
 
 	drm_bridge_enable(bridge->next);
 }