drm/vkms: use new debugfs device-centered functions

Replace the use of drm_debugfs_create_files() with the new
drm_debugfs_add_files() function, which centers the debugfs files
management on the drm_device instead of drm_minor. Moreover, remove the
debugfs_init hook and add the debugfs files directly on vkms_create(),
before drm_dev_register().
Signed-off-by: Maíra Canal <mcanal@igalia.com>
Reviewed-by: Melissa Wen <mwen@igalia.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Maíra Canal <mairacanal@riseup.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20221219120621.15086-7-mcanal@igalia.com

drivers/gpu/drm/vkms/vkms_drv.c

@@ -92,8 +92,8 @@ static void vkms_atomic_commit_tail(struct drm_atomic_state *old_state)
 
 static int vkms_config_show(struct seq_file *m, void *data)
 {
-	struct drm_info_node *node = (struct drm_info_node *)m->private;
-	struct drm_device *dev = node->minor->dev;
+	struct drm_debugfs_entry *entry = m->private;
+	struct drm_device *dev = entry->dev;
 	struct vkms_device *vkmsdev = drm_device_to_vkms_device(dev);
 
 	seq_printf(m, "writeback=%d\n", vkmsdev->config->writeback);
@@ -103,24 +103,16 @@ static int vkms_config_show(struct seq_file *m, void *data)
 	return 0;
 }
 
-static const struct drm_info_list vkms_config_debugfs_list[] = {
+static const struct drm_debugfs_info vkms_config_debugfs_list[] = {
 	{ "vkms_config", vkms_config_show, 0 },
 };
 
-static void vkms_config_debugfs_init(struct drm_minor *minor)
-{
-	drm_debugfs_create_files(vkms_config_debugfs_list, ARRAY_SIZE(vkms_config_debugfs_list),
-				 minor->debugfs_root, minor);
-}
-
 static const struct drm_driver vkms_driver = {
 	.driver_features	= DRIVER_MODESET | DRIVER_ATOMIC | DRIVER_GEM,
 	.release		= vkms_release,
 	.fops			= &vkms_driver_fops,
 	DRM_GEM_SHMEM_DRIVER_OPS,
 
-	.debugfs_init           = vkms_config_debugfs_init,
-
 	.name			= DRIVER_NAME,
 	.desc			= DRIVER_DESC,
 	.date			= DRIVER_DATE,
@@ -202,6 +194,9 @@ static int vkms_create(struct vkms_config *config)
 	if (ret)
 		goto out_devres;
 
+	drm_debugfs_add_files(&vkms_device->drm, vkms_config_debugfs_list,
+			      ARRAY_SIZE(vkms_config_debugfs_list));
+
 	ret = drm_dev_register(&vkms_device->drm, 0);
 	if (ret)
 		goto out_devres;