drm/fb-helper: Move dirty-fb update into helper function

Move the dirty-fb update from the damage-worker callback into the
new helper drm_fb_helper_fb_dirty(), so that it can run outside the
damage worker. This change will help to remove the damage worker
entirely. No functional changes.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20221115115819.23088-3-tzimmermann@suse.de

drivers/gpu/drm/drm_fb_helper.c

@@ -367,9 +367,8 @@ static void drm_fb_helper_resume_worker(struct work_struct *work)
 	console_unlock();
 }
 
-static void drm_fb_helper_damage_work(struct work_struct *work)
+static void drm_fb_helper_fb_dirty(struct drm_fb_helper *helper)
 {
-	struct drm_fb_helper *helper = container_of(work, struct drm_fb_helper, damage_work);
 	struct drm_device *dev = helper->dev;
 	struct drm_clip_rect *clip = &helper->damage_clip;
 	struct drm_clip_rect clip_copy;
@@ -404,6 +403,13 @@ static void drm_fb_helper_damage_work(struct work_struct *work)
 	spin_unlock_irqrestore(&helper->damage_lock, flags);
 }
 
+static void drm_fb_helper_damage_work(struct work_struct *work)
+{
+	struct drm_fb_helper *helper = container_of(work, struct drm_fb_helper, damage_work);
+
+	drm_fb_helper_fb_dirty(helper);
+}
+
 /**
  * drm_fb_helper_prepare - setup a drm_fb_helper structure
  * @dev: DRM device