[PATCH v2 04/25] drm: get drm_bridge_panel connector via helper

[Sam Ravnborg <sam@ravnborg.org>]

The drm_connector created by drm_panel_bridge was accessed
via drm_panel.connector.
Avoid the detour around drm_panel by providing a simple get method.
This avoids direct access to the connector field in drm_panel in
the two users.

The change is done in preparation for removal of drm_panel.connector.

Update pl111 and tve200 to use the new helper.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Andrzej Hajda <a.hajda@samsung.com>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
Cc: Jonas Karlman <jonas@kwiboo.se>
Cc: Jernej Skrabec <jernej.skrabec@siol.net>
Cc: Eric Anholt <eric@anholt.net>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
---
 drivers/gpu/drm/bridge/panel.c      | 17 +++++++++++++++++
 drivers/gpu/drm/pl111/pl111_drv.c   |  2 +-
 drivers/gpu/drm/tve200/tve200_drv.c |  2 +-
 include/drm/drm_bridge.h            |  1 +
 4 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/bridge/panel.c b/drivers/gpu/drm/bridge/panel.c
index f4e293e7cf64..554da47f6d62 100644
--- a/drivers/gpu/drm/bridge/panel.c
+++ b/drivers/gpu/drm/bridge/panel.c
@@ -289,3 +289,20 @@ struct drm_bridge *devm_drm_panel_bridge_add_typed(struct device *dev,
 	return bridge;
 }
 EXPORT_SYMBOL(devm_drm_panel_bridge_add_typed);
+
+/**
+ * drm_panel_bridge_connector - return the connector for the panel bridge
+ *
+ * drm_panel_bridge creates the connector.
+ * This function gives external access to the connector.
+ *
+ * Returns: Pointer to drm_connector
+ */
+struct drm_connector *drm_panel_bridge_connector(struct drm_bridge *bridge)
+{
+	struct panel_bridge *panel_bridge;
+
+	panel_bridge = drm_bridge_to_panel_bridge(bridge);
+
+	return &panel_bridge->connector;
+}
diff --git a/drivers/gpu/drm/pl111/pl111_drv.c b/drivers/gpu/drm/pl111/pl111_drv.c
index 63dfcda04147..aa8aa8d9e405 100644
--- a/drivers/gpu/drm/pl111/pl111_drv.c
+++ b/drivers/gpu/drm/pl111/pl111_drv.c
@@ -166,7 +166,7 @@ static int pl111_modeset_init(struct drm_device *dev)
 	priv->bridge = bridge;
 	if (panel) {
 		priv->panel = panel;
-		priv->connector = panel->connector;
+		priv->connector = drm_panel_bridge_connector(bridge);
 	}
 
 	ret = pl111_display_init(dev);
diff --git a/drivers/gpu/drm/tve200/tve200_drv.c b/drivers/gpu/drm/tve200/tve200_drv.c
index 954b09c948eb..00ba9e5ce130 100644
--- a/drivers/gpu/drm/tve200/tve200_drv.c
+++ b/drivers/gpu/drm/tve200/tve200_drv.c
@@ -110,7 +110,7 @@ static int tve200_modeset_init(struct drm_device *dev)
 	}
 
 	priv->panel = panel;
-	priv->connector = panel->connector;
+	priv->connector = drm_panel_bridge_connector(bridge);
 	priv->bridge = bridge;
 
 	dev_info(dev->dev, "attached to panel %s\n",
diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h
index c0a2286a81e9..9a4902accfe5 100644
--- a/include/drm/drm_bridge.h
+++ b/include/drm/drm_bridge.h
@@ -438,6 +438,7 @@ struct drm_bridge *devm_drm_panel_bridge_add(struct device *dev,
 struct drm_bridge *devm_drm_panel_bridge_add_typed(struct device *dev,
 						   struct drm_panel *panel,
 						   u32 connector_type);
+struct drm_connector *drm_panel_bridge_connector(struct drm_bridge *bridge);
 #endif
 
 #endif
-- 
2.20.1