[PATCH RFC v2 16/19] drm/omap: dss: don't create a panel_bridge

[Luca Ceresoli <luca.ceresoli@bootlin.com>]

Now a panel_bridge is automatically created for every drm_panel, so this
code (similar to an open-coded variant of drm_of_find_panel_or_bridge())
would lead to creating a second bridge for the same panel.

Update and simplify the code by just getting a reference to the
already-existing bridge.

Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
---
 drivers/gpu/drm/omapdrm/dss/omapdss.h |  1 -
 drivers/gpu/drm/omapdrm/dss/output.c  | 42 ++++-------------------------------
 2 files changed, 4 insertions(+), 39 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/dss/omapdss.h b/drivers/gpu/drm/omapdrm/dss/omapdss.h
index 4c22c09c93d5..e3e685c931f1 100644
--- a/drivers/gpu/drm/omapdrm/dss/omapdss.h
+++ b/drivers/gpu/drm/omapdrm/dss/omapdss.h
@@ -204,7 +204,6 @@ struct omap_dss_device {
 	struct dss_device *dss;
 	struct drm_bridge *bridge;
 	struct drm_bridge *next_bridge;
-	struct drm_panel *panel;
 
 	struct list_head list;
 
diff --git a/drivers/gpu/drm/omapdrm/dss/output.c b/drivers/gpu/drm/omapdrm/dss/output.c
index 6e9bc605ee22..36d37deac802 100644
--- a/drivers/gpu/drm/omapdrm/dss/output.c
+++ b/drivers/gpu/drm/omapdrm/dss/output.c
@@ -12,7 +12,6 @@
 #include <linux/of_graph.h>
 
 #include <drm/drm_bridge.h>
-#include <drm/drm_panel.h>
 
 #include "dss.h"
 #include "omapdss.h"
@@ -20,40 +19,16 @@
 int omapdss_device_init_output(struct omap_dss_device *out,
 			       struct drm_bridge *local_bridge)
 {
-	struct device_node *remote_node;
+	struct drm_bridge *bridge;
 	int ret;
 
-	remote_node = of_graph_get_remote_node(out->dev->of_node,
-					       out->of_port, 0);
-	if (!remote_node) {
+	bridge = of_drm_get_bridge_by_endpoint(out->dev->of_node, out->of_port, 0);
+	if (IS_ERR(bridge)) {
 		dev_dbg(out->dev, "failed to find video sink\n");
 		return 0;
 	}
 
-	out->panel = of_drm_find_panel(remote_node);
-	if (IS_ERR(out->panel))
-		out->panel = NULL;
-
-	if (!out->panel)
-		out->bridge = of_drm_find_and_get_bridge(remote_node);
-
-	of_node_put(remote_node);
-
-	if (out->panel) {
-		struct drm_bridge *bridge;
-
-		bridge = drm_panel_bridge_add(out->panel);
-		drm_panel_put(out->panel);
-		if (IS_ERR(bridge)) {
-			dev_err(out->dev,
-				"unable to create panel bridge (%ld)\n",
-				PTR_ERR(bridge));
-			ret = PTR_ERR(bridge);
-			goto error;
-		}
-
-		out->bridge = drm_bridge_get(bridge);
-	}
+	out->bridge = bridge;
 
 	if (local_bridge) {
 		if (!out->bridge) {
@@ -65,11 +40,6 @@ int omapdss_device_init_output(struct omap_dss_device *out,
 		out->bridge = drm_bridge_get(local_bridge);
 	}
 
-	if (!out->bridge) {
-		ret = -EPROBE_DEFER;
-		goto error;
-	}
-
 	return 0;
 
 error:
@@ -79,10 +49,6 @@ int omapdss_device_init_output(struct omap_dss_device *out,
 
 void omapdss_device_cleanup_output(struct omap_dss_device *out)
 {
-	if (out->bridge && out->panel)
-		drm_panel_bridge_remove(out->next_bridge ?
-					out->next_bridge : out->bridge);
-
 	drm_bridge_put(out->next_bridge);
 	drm_bridge_put(out->bridge);
 }

-- 
2.55.0