drm: of: move drm_of_find_panel_or_bridge() from drm_of.c to drm_panel.c

We want to move drm_panel.o from the main drm module to a new drm_panel
module, but there is one function in the drm module that calls into
drm_panel.c code:

  drm_of_find_panel_or_bridge() (drm_of.c, drm module)
     -> calls of_drm_find_panel (drm_panel.c, future drm_panel module)

Avoid this issue by moving drm_of_find_panel_or_bridge() to drm_panel.c.

Update Kconfig symbols of drivers calling drm_of_find_panel_or_bridge() to
select DRM_PANEL when this is not done already.

No functional changes, just moving code around.

Suggested-by: Maxime Ripard <mripard@kernel.org>
Acked-by: Maxime Ripard <mripard@kernel.org>
Link: https://patch.msgid.link/20260916-drm-bridge-every-panel-v3-1-83afb4f1a707@bootlin.com
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>

2 files changed, 13 insertions, 12 deletions

diff --git a/include/drm/drm_of.h b/include/drm/drm_of.h
index ebebed14c611..402f5db11e47 100644
--- a/include/drm/drm_of.h
+++ b/include/drm/drm_of.h
@@ -51,10 +51,6 @@ int drm_of_encoder_active_endpoint(struct device_node *node,
 				   struct of_endpoint *endpoint);
 int drm_of_get_panel_orientation(const struct device_node *np,
 				 enum drm_panel_orientation *orientation);
-int drm_of_find_panel_or_bridge(const struct device_node *np,
-				int port, int endpoint,
-				struct drm_panel **panel,
-				struct drm_bridge **bridge);
 int drm_of_lvds_get_dual_link_pixel_order(const struct device_node *port1,
 					  const struct device_node *port2);
 int drm_of_lvds_get_dual_link_pixel_order_sink(struct device_node *port1,
@@ -112,14 +108,6 @@ static inline int drm_of_get_panel_orientation(const struct device_node *np,
 	return -EINVAL;
 }
 
-static inline int drm_of_find_panel_or_bridge(const struct device_node *np,
-					      int port, int endpoint,
-					      struct drm_panel **panel,
-					      struct drm_bridge **bridge)
-{
-	return -EINVAL;
-}
-
 static inline int
 drm_of_lvds_get_dual_link_pixel_order(const struct device_node *port1,
 				      const struct device_node *port2)
diff --git a/include/drm/drm_panel.h b/include/drm/drm_panel.h
index b87323443f49..bf15e40fd796 100644
--- a/include/drm/drm_panel.h
+++ b/include/drm/drm_panel.h
@@ -33,6 +33,7 @@
 struct backlight_device;
 struct dentry;
 struct device_node;
+struct drm_bridge;
 struct drm_connector;
 struct drm_panel_follower;
 struct drm_panel;
@@ -337,11 +338,23 @@ int drm_panel_get_modes(struct drm_panel *panel, struct drm_connector *connector
 
 #if defined(CONFIG_OF) && defined(CONFIG_DRM_PANEL)
 struct drm_panel *of_drm_find_panel(const struct device_node *np);
+int drm_of_find_panel_or_bridge(const struct device_node *np,
+				int port, int endpoint,
+				struct drm_panel **panel,
+				struct drm_bridge **bridge);
 #else
 static inline struct drm_panel *of_drm_find_panel(const struct device_node *np)
 {
 	return ERR_PTR(-ENODEV);
 }
+
+static inline int drm_of_find_panel_or_bridge(const struct device_node *np,
+					      int port, int endpoint,
+					      struct drm_panel **panel,
+					      struct drm_bridge **bridge)
+{
+	return -EINVAL;
+}
 #endif
 
 #if defined(CONFIG_DRM_PANEL)