By depending on devm_drm_panel_bridge_add(), devm_drm_of_get_bridge()
introduces a circular dependency between the modules drm (where
devm_drm_of_get_bridge() ends up) and drm_kms_helper (where
devm_drm_panel_bridge_add() is).
Fix this by moving devm_drm_of_get_bridge() to bridge/panel.c and thus
drm_kms_helper.
Fixes: 87ea95808d53 ("drm/bridge: Add a function to abstract away panels")
Reported-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Signed-off-by: Maxime Ripard <maxime@xxxxxxxxxx>
---
Hi Stephen,
I think it fixes the issue, but couldn't reproduce it here with my
config for some reason.
Let me know if it works for you.
Maxime
---
drivers/gpu/drm/bridge/panel.c | 36 ++++++++++++++++++++++++++++++++++
drivers/gpu/drm/drm_bridge.c | 34 --------------------------------
2 files changed, 36 insertions(+), 34 deletions(-)
diff --git a/drivers/gpu/drm/bridge/panel.c b/drivers/gpu/drm/bridge/panel.c
index c916f4b8907e..285a079cdef5 100644
--- a/drivers/gpu/drm/bridge/panel.c
+++ b/drivers/gpu/drm/bridge/panel.c
@@ -332,3 +332,39 @@ struct drm_connector *drm_panel_bridge_connector(struct drm_bridge *bridge)
return &panel_bridge->connector;
}
EXPORT_SYMBOL(drm_panel_bridge_connector);
+
+#ifdef CONFIG_OF
+/**
+ * devm_drm_of_get_bridge - Return next bridge in the chain
+ * @dev: device to tie the bridge lifetime to
+ * @np: device tree node containing encoder output ports
+ * @port: port in the device tree node
+ * @endpoint: endpoint in the device tree node
+ *
+ * Given a DT node's port and endpoint number, finds the connected node
+ * and returns the associated bridge if any, or creates and returns a
+ * drm panel bridge instance if a panel is connected.
+ *
+ * Returns a pointer to the bridge if successful, or an error pointer
+ * otherwise.
+ */
+struct drm_bridge *devm_drm_of_get_bridge(struct device *dev,
+ struct device_node *np,
+ u32 port, u32 endpoint)
+{
+ struct drm_bridge *bridge;
+ struct drm_panel *panel;
+ int ret;
+
+ ret = drm_of_find_panel_or_bridge(np, port, endpoint,
+ &panel, &bridge);
+ if (ret)
+ return ERR_PTR(ret);
+
+ if (panel)
+ bridge = devm_drm_panel_bridge_add(dev, panel);
+
+ return bridge;
+}
+EXPORT_SYMBOL(devm_drm_of_get_bridge);
+#endif
diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c
index 4c68733fa660..7ee29f073857 100644
--- a/drivers/gpu/drm/drm_bridge.c
+++ b/drivers/gpu/drm/drm_bridge.c
@@ -1232,40 +1232,6 @@ struct drm_bridge *of_drm_find_bridge(struct device_node *np)
return NULL;
}
EXPORT_SYMBOL(of_drm_find_bridge);
-
-/**
- * devm_drm_of_get_bridge - Return next bridge in the chain
- * @dev: device to tie the bridge lifetime to
- * @np: device tree node containing encoder output ports
- * @port: port in the device tree node
- * @endpoint: endpoint in the device tree node
- *
- * Given a DT node's port and endpoint number, finds the connected node
- * and returns the associated bridge if any, or creates and returns a
- * drm panel bridge instance if a panel is connected.
- *
- * Returns a pointer to the bridge if successful, or an error pointer
- * otherwise.
- */
-struct drm_bridge *devm_drm_of_get_bridge(struct device *dev,
- struct device_node *np,
- u32 port, u32 endpoint)
-{
- struct drm_bridge *bridge;
- struct drm_panel *panel;
- int ret;
-
- ret = drm_of_find_panel_or_bridge(np, port, endpoint,
- &panel, &bridge);
- if (ret)
- return ERR_PTR(ret);
-
- if (panel)
- bridge = devm_drm_panel_bridge_add(dev, panel);
-
- return bridge;
-}
-EXPORT_SYMBOL(devm_drm_of_get_bridge);
#endif
MODULE_AUTHOR("Ajay Kumar <ajaykumar.rs@xxxxxxxxxxx>");
--
2.31.1
