drm: convert drivers to use drm_of_find_panel_or_bridge

[karo-tx-linux.git] / drivers / gpu / drm / atmel-hlcdc / atmel_hlcdc_output.c

diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c
index e7799b6ee8293d706252c07c79cc15c6e2c44811..f987b4572d4a9c3d486c6bff49c9bad2e03abbe5 100644 (file)
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c
@@ -22,7 +22,7 @@
 #include <linux/of_graph.h>
 
 #include <drm/drmP.h>
-#include <drm/drm_panel.h>
+#include <drm/drm_of.h>
 
 #include "atmel_hlcdc_dc.h"
 
@@ -152,29 +152,11 @@ static const struct drm_connector_funcs atmel_hlcdc_panel_connector_funcs = {
        .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 };
 
-static int atmel_hlcdc_check_endpoint(struct drm_device *dev,
-                                     const struct of_endpoint *ep)
-{
-       struct device_node *np;
-       void *obj;
-
-       np = of_graph_get_remote_port_parent(ep->local_node);
-
-       obj = of_drm_find_panel(np);
-       if (!obj)
-               obj = of_drm_find_bridge(np);
-
-       of_node_put(np);
-
-       return obj ? 0 : -EPROBE_DEFER;
-}
-
 static int atmel_hlcdc_attach_endpoint(struct drm_device *dev,
-                                      const struct of_endpoint *ep)
+                                      const struct device_node *np)
 {
        struct atmel_hlcdc_dc *dc = dev->dev_private;
        struct atmel_hlcdc_rgb_output *output;
-       struct device_node *np;
        struct drm_panel *panel;
        struct drm_bridge *bridge;
        int ret;
@@ -195,13 +177,11 @@ static int atmel_hlcdc_attach_endpoint(struct drm_device *dev,
 
        output->encoder.possible_crtcs = 0x1;
 
-       np = of_graph_get_remote_port_parent(ep->local_node);
-
-       ret = -EPROBE_DEFER;
+       ret = drm_of_find_panel_or_bridge(np, 0, 0, &panel, &bridge);
+       if (ret)
+               return ret;
 
-       panel = of_drm_find_panel(np);
        if (panel) {
-               of_node_put(np);
                output->connector.dpms = DRM_MODE_DPMS_OFF;
                output->connector.polled = DRM_CONNECTOR_POLL_CONNECT;
                drm_connector_helper_add(&output->connector,
@@ -226,9 +206,6 @@ static int atmel_hlcdc_attach_endpoint(struct drm_device *dev,
                return 0;
        }
 
-       bridge = of_drm_find_bridge(np);
-       of_node_put(np);
-
        if (bridge) {
                ret = drm_bridge_attach(&output->encoder, bridge, NULL);
                if (!ret)
@@ -243,31 +220,23 @@ err_encoder_cleanup:
 
 int atmel_hlcdc_create_outputs(struct drm_device *dev)
 {
-       struct device_node *ep_np = NULL;
-       struct of_endpoint ep;
-       int ret;
-
-       for_each_endpoint_of_node(dev->dev->of_node, ep_np) {
-               ret = of_graph_parse_endpoint(ep_np, &ep);
-               if (!ret)
-                       ret = atmel_hlcdc_check_endpoint(dev, &ep);
-
-               if (ret) {
-                       of_node_put(ep_np);
-                       return ret;
-               }
-       }
-
-       for_each_endpoint_of_node(dev->dev->of_node, ep_np) {
-               ret = of_graph_parse_endpoint(ep_np, &ep);
-               if (!ret)
-                       ret = atmel_hlcdc_attach_endpoint(dev, &ep);
-
-               if (ret) {
-                       of_node_put(ep_np);
+       struct device_node *remote;
+       int ret, endpoint = 0;
+
+       while (true) {
+               /* Loop thru possible multiple connections to the output */
+               remote = of_graph_get_remote_node(dev->dev->of_node, 0,
+                                                 endpoint++);
+               if (!remote)
+                       break;
+
+               ret = atmel_hlcdc_attach_endpoint(dev, remote);
+               of_node_put(remote);
+               if (ret)
                        return ret;
-               }
        }
 
-       return 0;
+       if (!endpoint)
+               return -ENODEV;
+       return ret;
 }