drm/tegra: sor: Root debugfs files at the connector

Rather create new files within the top-level DRM device's debugfs node,
add the SOR specific files to the connector's debugfs node. This avoids
the need to come up with subdirectory names and is also more intuitive.

Signed-off-by: Thierry Reding <treding@nvidia.com>

drivers/gpu/drm/tegra/sor.c

@@ -184,7 +184,6 @@ struct tegra_sor {
 
 	struct drm_info_list *debugfs_files;
 	struct drm_minor *minor;
-	struct dentry *debugfs;
 
 	const struct tegra_sor_ops *ops;
 
@@ -1260,14 +1259,10 @@ static const struct drm_info_list debugfs_files[] = {
 static int tegra_sor_debugfs_init(struct tegra_sor *sor,
 				  struct drm_minor *minor)
 {
-	const char *name = sor->soc->supports_dp ? "sor1" : "sor";
+	struct dentry *root = sor->output.connector.debugfs_entry;
 	unsigned int i;
 	int err;
 
-	sor->debugfs = debugfs_create_dir(name, minor->debugfs_root);
-	if (!sor->debugfs)
-		return -ENOMEM;
-
 	sor->debugfs_files = kmemdup(debugfs_files, sizeof(debugfs_files),
 				     GFP_KERNEL);
 	if (!sor->debugfs_files) {
@@ -1280,7 +1275,7 @@ static int tegra_sor_debugfs_init(struct tegra_sor *sor,
 
 	err = drm_debugfs_create_files(sor->debugfs_files,
 				       ARRAY_SIZE(debugfs_files),
-				       sor->debugfs, minor);
+				       root, minor);
 	if (err < 0)
 		goto free;
 
@@ -1292,13 +1287,14 @@ free:
 	kfree(sor->debugfs_files);
 	sor->debugfs_files = NULL;
 remove:
-	debugfs_remove_recursive(sor->debugfs);
-	sor->debugfs = NULL;
+	debugfs_remove_recursive(root);
 	return err;
 }
 
 static void tegra_sor_debugfs_exit(struct tegra_sor *sor)
 {
+	struct dentry *root = sor->output.connector.debugfs_entry;
+
 	drm_debugfs_remove_files(sor->debugfs_files, ARRAY_SIZE(debugfs_files),
 				 sor->minor);
 	sor->minor = NULL;
@@ -1306,8 +1302,7 @@ static void tegra_sor_debugfs_exit(struct tegra_sor *sor)
 	kfree(sor->debugfs_files);
 	sor->debugfs_files = NULL;
 
-	debugfs_remove_recursive(sor->debugfs);
-	sor->debugfs = NULL;
+	debugfs_remove_recursive(root);
 }
 
 static void tegra_sor_connector_reset(struct drm_connector *connector)