drm/connector: Allow creation of margin props alone

TV margins properties can only be added as part of the SDTV TV
connector properties creation, but we might need those props for HDMI
TVs too, so let's move the margins props creation in a separate
function and expose it to drivers.

We also add an helper to attach margins props to a connector.
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20181206142439.10441-4-boris.brezillon@bootlin.com

drivers/gpu/drm/drm_connector.c

@@ -1137,6 +1137,70 @@ void drm_hdmi_avi_infoframe_content_type(struct hdmi_avi_infoframe *frame,
 }
 EXPORT_SYMBOL(drm_hdmi_avi_infoframe_content_type);
 
+/**
+ * drm_mode_attach_tv_margin_properties - attach TV connector margin properties
+ * @connector: DRM connector
+ *
+ * Called by a driver when it needs to attach TV margin props to a connector.
+ * Typically used on SDTV and HDMI connectors.
+ */
+void drm_connector_attach_tv_margin_properties(struct drm_connector *connector)
+{
+	struct drm_device *dev = connector->dev;
+
+	drm_object_attach_property(&connector->base,
+				   dev->mode_config.tv_left_margin_property,
+				   0);
+	drm_object_attach_property(&connector->base,
+				   dev->mode_config.tv_right_margin_property,
+				   0);
+	drm_object_attach_property(&connector->base,
+				   dev->mode_config.tv_top_margin_property,
+				   0);
+	drm_object_attach_property(&connector->base,
+				   dev->mode_config.tv_bottom_margin_property,
+				   0);
+}
+EXPORT_SYMBOL(drm_connector_attach_tv_margin_properties);
+
+/**
+ * drm_mode_create_tv_margin_properties - create TV connector margin properties
+ * @dev: DRM device
+ *
+ * Called by a driver's HDMI connector initialization routine, this function
+ * creates the TV margin properties for a given device. No need to call this
+ * function for an SDTV connector, it's already called from
+ * drm_mode_create_tv_properties().
+ */
+int drm_mode_create_tv_margin_properties(struct drm_device *dev)
+{
+	if (dev->mode_config.tv_left_margin_property)
+		return 0;
+
+	dev->mode_config.tv_left_margin_property =
+		drm_property_create_range(dev, 0, "left margin", 0, 100);
+	if (!dev->mode_config.tv_left_margin_property)
+		return -ENOMEM;
+
+	dev->mode_config.tv_right_margin_property =
+		drm_property_create_range(dev, 0, "right margin", 0, 100);
+	if (!dev->mode_config.tv_right_margin_property)
+		return -ENOMEM;
+
+	dev->mode_config.tv_top_margin_property =
+		drm_property_create_range(dev, 0, "top margin", 0, 100);
+	if (!dev->mode_config.tv_top_margin_property)
+		return -ENOMEM;
+
+	dev->mode_config.tv_bottom_margin_property =
+		drm_property_create_range(dev, 0, "bottom margin", 0, 100);
+	if (!dev->mode_config.tv_bottom_margin_property)
+		return -ENOMEM;
+
+	return 0;
+}
+EXPORT_SYMBOL(drm_mode_create_tv_margin_properties);
+
 /**
  * drm_mode_create_tv_properties - create TV specific connector properties
  * @dev: DRM device
@@ -1183,24 +1247,7 @@ int drm_mode_create_tv_properties(struct drm_device *dev,
 	/*
 	 * Other, TV specific properties: margins & TV modes.
 	 */
-	dev->mode_config.tv_left_margin_property =
-		drm_property_create_range(dev, 0, "left margin", 0, 100);
-	if (!dev->mode_config.tv_left_margin_property)
-		goto nomem;
-
-	dev->mode_config.tv_right_margin_property =
-		drm_property_create_range(dev, 0, "right margin", 0, 100);
-	if (!dev->mode_config.tv_right_margin_property)
-		goto nomem;
-
-	dev->mode_config.tv_top_margin_property =
-		drm_property_create_range(dev, 0, "top margin", 0, 100);
-	if (!dev->mode_config.tv_top_margin_property)
-		goto nomem;
-
-	dev->mode_config.tv_bottom_margin_property =
-		drm_property_create_range(dev, 0, "bottom margin", 0, 100);
-	if (!dev->mode_config.tv_bottom_margin_property)
+	if (drm_mode_create_tv_margin_properties(dev))
 		goto nomem;
 
 	dev->mode_config.tv_mode_property =

include/drm/drm_connector.h

@@ -1238,9 +1238,11 @@ const char *drm_get_tv_select_name(int val);
 const char *drm_get_content_protection_name(int val);
 
 int drm_mode_create_dvi_i_properties(struct drm_device *dev);
+int drm_mode_create_tv_margin_properties(struct drm_device *dev);
 int drm_mode_create_tv_properties(struct drm_device *dev,
 				  unsigned int num_modes,
 				  const char * const modes[]);
+void drm_connector_attach_tv_margin_properties(struct drm_connector *conn);
 int drm_mode_create_scaling_mode_property(struct drm_device *dev);
 int drm_connector_attach_content_type_property(struct drm_connector *dev);
 int drm_connector_attach_scaling_mode_property(struct drm_connector *connector,