[PATCH 1/2] drm/exynos/dpi: use of_graph_get_endpoint_by_regs helper

[Philipp Zabel]

This allows to remove the local of_graph_get_port_by_reg(),
of_graph_get_endpoint_by_reg(), of_get_child_by_name_reg(),
and of_graph_get_remote_port_parent() functions.

Signed-off-by: Philipp Zabel <p.zabel at pengutronix.de>
---
 drivers/gpu/drm/exynos/exynos_drm_dpi.c | 69 +--------------------------------
 1 file changed, 2 insertions(+), 67 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_dpi.c 
b/drivers/gpu/drm/exynos/exynos_drm_dpi.c
index 75e570f..5e38e74 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_dpi.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_dpi.c
@@ -15,6 +15,7 @@
 #include <drm/drm_panel.h>
 #include <drm/drm_atomic_helper.h>

+#include <linux/of_graph.h>
 #include <linux/regulator/consumer.h>

 #include <video/of_videomode.h>
@@ -164,67 +165,6 @@ static const struct drm_encoder_funcs 
exynos_dpi_encoder_funcs = {
        .destroy = drm_encoder_cleanup,
 };

-/* of_* functions will be removed after merge of of_graph patches */
-static struct device_node *
-of_get_child_by_name_reg(struct device_node *parent, const char *name, u32 reg)
-{
-       struct device_node *np;
-
-       for_each_child_of_node(parent, np) {
-               u32 r;
-
-               if (!np->name || of_node_cmp(np->name, name))
-                       continue;
-
-               if (of_property_read_u32(np, "reg", &r) < 0)
-                       r = 0;
-
-               if (reg == r)
-                       break;
-       }
-
-       return np;
-}
-
-static struct device_node *of_graph_get_port_by_reg(struct device_node *parent,
-                                                   u32 reg)
-{
-       struct device_node *ports, *port;
-
-       ports = of_get_child_by_name(parent, "ports");
-       if (ports)
-               parent = ports;
-
-       port = of_get_child_by_name_reg(parent, "port", reg);
-
-       of_node_put(ports);
-
-       return port;
-}
-
-static struct device_node *
-of_graph_get_endpoint_by_reg(struct device_node *port, u32 reg)
-{
-       return of_get_child_by_name_reg(port, "endpoint", reg);
-}
-
-static struct device_node *
-of_graph_get_remote_port_parent(const struct device_node *node)
-{
-       struct device_node *np;
-       unsigned int depth;
-
-       np = of_parse_phandle(node, "remote-endpoint", 0);
-
-       /* Walk 3 levels up only if there is 'ports' node. */
-       for (depth = 3; depth && np; depth--) {
-               np = of_get_next_parent(np);
-               if (depth == 2 && of_node_cmp(np->name, "ports"))
-                       break;
-       }
-       return np;
-}
-
 enum {
        FIMD_PORT_IN0,
        FIMD_PORT_IN1,
@@ -237,12 +177,7 @@ static struct device_node 
*exynos_dpi_of_find_panel_node(struct device *dev)
 {
        struct device_node *np, *ep;

-       np = of_graph_get_port_by_reg(dev->of_node, FIMD_PORT_RGB);
-       if (!np)
-               return NULL;
-
-       ep = of_graph_get_endpoint_by_reg(np, 0);
-       of_node_put(np);
+       ep = of_graph_get_endpoint_by_regs(dev->of_node, FIMD_PORT_RGB, 0);
        if (!ep)
                return NULL;

-- 
2.8.0.rc3