Commit c8a3b2ae authored by Laurent Pinchart's avatar Laurent Pinchart Committed by Thierry Reding

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

Instead of forcing bridges to implement empty callbacks make them all
optional.
Signed-off-by: default avatarLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent 06a9dc65
......@@ -186,7 +186,8 @@ void drm_bridge_disable(struct drm_bridge *bridge)
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 @@ void drm_bridge_post_disable(struct drm_bridge *bridge)
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 @@ void drm_bridge_pre_enable(struct drm_bridge *bridge)
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 @@ void drm_bridge_enable(struct drm_bridge *bridge)
if (!bridge)
return;
bridge->funcs->enable(bridge);
if (bridge->funcs->enable)
bridge->funcs->enable(bridge);
drm_bridge_enable(bridge->next);
}
......
......@@ -1581,6 +1581,8 @@ struct drm_bridge_funcs {
*
* The bridge can assume that the display pipe (i.e. clocks and timing
* signals) feeding it is still running when this callback is called.
*
* The disable callback is optional.
*/
void (*disable)(struct drm_bridge *bridge);
......@@ -1597,6 +1599,8 @@ struct drm_bridge_funcs {
* The bridge must assume that the display pipe (i.e. clocks and timing
* singals) feeding it is no longer running when this callback is
* called.
*
* The post_disable callback is optional.
*/
void (*post_disable)(struct drm_bridge *bridge);
......@@ -1625,6 +1629,8 @@ struct drm_bridge_funcs {
* will not yet be running when this callback is called. The bridge must
* not enable the display link feeding the next bridge in the chain (if
* there is one) when this callback is called.
*
* The pre_enable callback is optional.
*/
void (*pre_enable)(struct drm_bridge *bridge);
......@@ -1642,6 +1648,8 @@ struct drm_bridge_funcs {
* signals) feeding it is running when this callback is called. This
* callback must enable the display link feeding the next bridge in the
* chain if there is one.
*
* The enable callback is optional.
*/
void (*enable)(struct drm_bridge *bridge);
};
......
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