fbdev: omap2: replace of_graph_get_next_endpoint()

From DT point of view, in general, drivers should be asking for a
specific port number because their function is fixed in the binding.

of_graph_get_next_endpoint() doesn't match to this concept.

Simply replace

	- of_graph_get_next_endpoint(xxx, NULL);
	+ of_graph_get_endpoint_by_regs(xxx, 0, -1);

Link: https://lore.kernel.org/r/20240202174941.GA310089-robh@kernel.org
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Helge Deller <deller@gmx.de>

drivers/video/fbdev/omap2/omapfb/dss/dsi.c

@@ -28,6 +28,7 @@
 #include <linux/debugfs.h>
 #include <linux/pm_runtime.h>
 #include <linux/of.h>
+#include <linux/of_graph.h>
 #include <linux/of_platform.h>
 #include <linux/component.h>
 
@@ -5079,7 +5080,7 @@ static int dsi_probe_of(struct platform_device *pdev)
 	struct device_node *ep;
 	struct omap_dsi_pin_config pin_cfg;
 
-	ep = omapdss_of_get_first_endpoint(node);
+	ep = of_graph_get_endpoint_by_regs(node, 0, -1);
 	if (!ep)
 		return 0;
 

drivers/video/fbdev/omap2/omapfb/dss/dss-of.c

@@ -130,32 +130,14 @@ static struct device_node *omapdss_of_get_remote_port(const struct device_node *
 	return np;
 }
 
-struct device_node *
-omapdss_of_get_first_endpoint(const struct device_node *parent)
-{
-	struct device_node *port, *ep;
-
-	port = omapdss_of_get_next_port(parent, NULL);
-
-	if (!port)
-		return NULL;
-
-	ep = omapdss_of_get_next_endpoint(port, NULL);
-
-	of_node_put(port);
-
-	return ep;
-}
-EXPORT_SYMBOL_GPL(omapdss_of_get_first_endpoint);
-
 struct omap_dss_device *
 omapdss_of_find_source_for_first_ep(struct device_node *node)
 {
 	struct device_node *ep;
 	struct device_node *src_port;
 	struct omap_dss_device *src;
 
-	ep = omapdss_of_get_first_endpoint(node);
+	ep = of_graph_get_endpoint_by_regs(node, 0, -1);
 	if (!ep)
 		return ERR_PTR(-EINVAL);
 

drivers/video/fbdev/omap2/omapfb/dss/hdmi4.c

@@ -20,6 +20,7 @@
 #include <linux/pm_runtime.h>
 #include <linux/clk.h>
 #include <linux/of.h>
+#include <linux/of_graph.h>
 #include <linux/regulator/consumer.h>
 #include <linux/component.h>
 #include <video/omapfb_dss.h>
@@ -529,7 +530,7 @@ static int hdmi_probe_of(struct platform_device *pdev)
 	struct device_node *ep;
 	int r;
 
-	ep = omapdss_of_get_first_endpoint(node);
+	ep = of_graph_get_endpoint_by_regs(node, 0, -1);
 	if (!ep)
 		return 0;
 

drivers/video/fbdev/omap2/omapfb/dss/hdmi5.c

@@ -25,6 +25,7 @@
 #include <linux/pm_runtime.h>
 #include <linux/clk.h>
 #include <linux/of.h>
+#include <linux/of_graph.h>
 #include <linux/regulator/consumer.h>
 #include <linux/component.h>
 #include <video/omapfb_dss.h>
@@ -561,7 +562,7 @@ static int hdmi_probe_of(struct platform_device *pdev)
 	struct device_node *ep;
 	int r;
 
-	ep = omapdss_of_get_first_endpoint(node);
+	ep = of_graph_get_endpoint_by_regs(node, 0, -1);
 	if (!ep)
 		return 0;
 

drivers/video/fbdev/omap2/omapfb/dss/venc.c

@@ -24,6 +24,7 @@
 #include <linux/regulator/consumer.h>
 #include <linux/pm_runtime.h>
 #include <linux/of.h>
+#include <linux/of_graph.h>
 #include <linux/component.h>
 
 #include <video/omapfb_dss.h>
@@ -764,7 +765,7 @@ static int venc_probe_of(struct platform_device *pdev)
 	u32 channels;
 	int r;
 
-	ep = omapdss_of_get_first_endpoint(node);
+	ep = of_graph_get_endpoint_by_regs(node, 0, -1);
 	if (!ep)
 		return 0;
 

drivers/video/fbdev/pxafb.c

@@ -2171,7 +2171,7 @@ static int of_get_pxafb_mode_info(struct device *dev,
 	u32 bus_width;
 	int ret, i;
 
-	np = of_graph_get_next_endpoint(dev->of_node, NULL);
+	np = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1);
 	if (!np) {
 		dev_err(dev, "could not find endpoint\n");
 		return -EINVAL;

include/video/omapfb_dss.h

@@ -819,9 +819,6 @@ struct device_node *
 omapdss_of_get_next_endpoint(const struct device_node *parent,
 			     struct device_node *prev);
 
-struct device_node *
-omapdss_of_get_first_endpoint(const struct device_node *parent);
-
 struct omap_dss_device *
 omapdss_of_find_source_for_first_ep(struct device_node *node);
 #else