drm/rockchip: Convert the probe function to the generic drm_of_component_probe()

Use the generic drm_of_component_probe() function to probe for components.

Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1445332995-11212-4-git-send-email-Liviu.Dudau@arm.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 6 insertions, 75 deletions

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
index f22e1e1ee64a..d26e0cc7dc4b 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
@@ -19,6 +19,7 @@
 #include <drm/drmP.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_fb_helper.h>
+#include <drm/drm_of.h>
 #include <linux/dma-mapping.h>
 #include <linux/pm_runtime.h>
 #include <linux/module.h>
@@ -418,29 +419,6 @@ static int compare_of(struct device *dev, void *data)
         return dev->of_node == np;
 }
 
-static void rockchip_add_endpoints(struct device *dev,
-                                   struct component_match **match,
-                                   struct device_node *port)
-{
-        struct device_node *ep, *remote;
-
-        for_each_child_of_node(port, ep) {
-                remote = of_graph_get_remote_port_parent(ep);
-                if (!remote || !of_device_is_available(remote)) {
-                        of_node_put(remote);
-                        continue;
-                } else if (!of_device_is_available(remote->parent)) {
-                        dev_warn(dev, "parent device of %s is not available\n",
-                                 remote->full_name);
-                        of_node_put(remote);
-                        continue;
-                }
-
-                component_match_add(dev, match, compare_of, remote);
-                of_node_put(remote);
-        }
-}
-
 static int rockchip_drm_bind(struct device *dev)
 {
         struct drm_device *drm;
@@ -483,61 +461,14 @@ static const struct component_master_ops rockchip_drm_ops = {
 
 static int rockchip_drm_platform_probe(struct platform_device *pdev)
 {
-        struct device *dev = &pdev->dev;
-        struct component_match *match = NULL;
-        struct device_node *np = dev->of_node;
-        struct device_node *port;
-        int i;
-
-        if (!np)
-                return -ENODEV;
-        /*
-         * Bind the crtc ports first, so that
-         * drm_of_find_possible_crtcs called from encoder .bind callbacks
-         * works as expected.
-         */
-        for (i = 0;; i++) {
-                port = of_parse_phandle(np, "ports", i);
-                if (!port)
-                        break;
-
-                if (!of_device_is_available(port->parent)) {
-                        of_node_put(port);
-                        continue;
-                }
-
-                component_match_add(dev, &match, compare_of, port->parent);
-                of_node_put(port);
-        }
+        int ret = drm_of_component_probe(&pdev->dev, compare_of,
+                                         &rockchip_drm_ops);
 
-        if (i == 0) {
-                dev_err(dev, "missing 'ports' property\n");
+        /* keep compatibility with old code that was returning -ENODEV */
+        if (ret == -EINVAL)
                 return -ENODEV;
-        }
 
-        if (!match) {
-                dev_err(dev, "No available vop found for display-subsystem.\n");
-                return -ENODEV;
-        }
-        /*
-         * For each bound crtc, bind the encoders attached to its
-         * remote endpoint.
-         */
-        for (i = 0;; i++) {
-                port = of_parse_phandle(np, "ports", i);
-                if (!port)
-                        break;
-
-                if (!of_device_is_available(port->parent)) {
-                        of_node_put(port);
-                        continue;
-                }
-
-                rockchip_add_endpoints(dev, &match, port);
-                of_node_put(port);
-        }
-
-        return component_master_add_with_match(dev, &rockchip_drm_ops, match);
+        return ret;
 }
 
 static int rockchip_drm_platform_remove(struct platform_device *pdev)