drm/vmwgfx: Drop drm_vblank_cleanup

Again stopping the vblank before uninstalling the irq handler is kinda
the wrong way round, but the fb_off stuff should take care of
disabling the dsiplay at least in most cases. So drop the
drm_vblank_cleanup code since it's not really doing anything, it looks
all cargo-culted.

v2: Appease gcc better.

v3: Simplify code (Sean Paul)

Cc: Sinclair Yeh <syeh@vmware.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170626161949.25629-1-daniel.vetter@ffwll.ch

drivers/gpu/drm/vmwgfx/vmwgfx_kms.c

@@ -1771,7 +1771,7 @@ int vmw_kms_init(struct vmw_private *dev_priv)
 
 int vmw_kms_close(struct vmw_private *dev_priv)
 {
-	int ret;
+	int ret = 0;
 
 	/*
 	 * Docs says we should take the lock before calling this function
@@ -1779,11 +1779,7 @@ int vmw_kms_close(struct vmw_private *dev_priv)
 	 * drm_encoder_cleanup which takes the lock we deadlock.
 	 */
 	drm_mode_config_cleanup(dev_priv->dev);
-	if (dev_priv->active_display_unit == vmw_du_screen_object)
-		ret = vmw_kms_sou_close_display(dev_priv);
-	else if (dev_priv->active_display_unit == vmw_du_screen_target)
-		ret = vmw_kms_stdu_close_display(dev_priv);
-	else
+	if (dev_priv->active_display_unit == vmw_du_legacy)
 		ret = vmw_kms_ldu_close_display(dev_priv);
 
 	return ret;

drivers/gpu/drm/vmwgfx/vmwgfx_kms.h

@@ -405,7 +405,6 @@ int vmw_kms_update_proxy(struct vmw_resource *res,
  * Screen Objects display functions - vmwgfx_scrn.c
  */
 int vmw_kms_sou_init_display(struct vmw_private *dev_priv);
-int vmw_kms_sou_close_display(struct vmw_private *dev_priv);
 int vmw_kms_sou_do_surface_dirty(struct vmw_private *dev_priv,
 				 struct vmw_framebuffer *framebuffer,
 				 struct drm_clip_rect *clips,
@@ -433,7 +432,6 @@ int vmw_kms_sou_readback(struct vmw_private *dev_priv,
  * Screen Target Display Unit functions - vmwgfx_stdu.c
  */
 int vmw_kms_stdu_init_display(struct vmw_private *dev_priv);
-int vmw_kms_stdu_close_display(struct vmw_private *dev_priv);
 int vmw_kms_stdu_surface_dirty(struct vmw_private *dev_priv,
 			       struct vmw_framebuffer *framebuffer,
 			       struct drm_clip_rect *clips,

drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c

@@ -582,13 +582,9 @@ err_free:
 
 int vmw_kms_ldu_close_display(struct vmw_private *dev_priv)
 {
-	struct drm_device *dev = dev_priv->dev;
-
 	if (!dev_priv->ldu_priv)
 		return -ENOSYS;
 
-	drm_vblank_cleanup(dev);
-
 	BUG_ON(!list_empty(&dev_priv->ldu_priv->active));
 
 	kfree(dev_priv->ldu_priv);

drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c

@@ -746,15 +746,6 @@ int vmw_kms_sou_init_display(struct vmw_private *dev_priv)
 	return 0;
 }
 
-int vmw_kms_sou_close_display(struct vmw_private *dev_priv)
-{
-	struct drm_device *dev = dev_priv->dev;
-
-	drm_vblank_cleanup(dev);
-
-	return 0;
-}
-
 static int do_dmabuf_define_gmrfb(struct vmw_private *dev_priv,
 				  struct vmw_framebuffer *framebuffer)
 {

drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c

@@ -1634,36 +1634,11 @@ int vmw_kms_stdu_init_display(struct vmw_private *dev_priv)
 
 		if (unlikely(ret != 0)) {
 			DRM_ERROR("Failed to initialize STDU %d", i);
-			goto err_vblank_cleanup;
+			return ret;
 		}
 	}
 
 	DRM_INFO("Screen Target Display device initialized\n");
 
-	return 0;
-
-err_vblank_cleanup:
-	drm_vblank_cleanup(dev);
-	return ret;
-}
-
-
-
-/**
- * vmw_kms_stdu_close_display - Cleans up after vmw_kms_stdu_init_display
- *
- * @dev_priv: VMW DRM device
- *
- * Frees up any resources allocated by vmw_kms_stdu_init_display
- *
- * RETURNS:
- * 0 on success
- */
-int vmw_kms_stdu_close_display(struct vmw_private *dev_priv)
-{
-	struct drm_device *dev = dev_priv->dev;
-
-	drm_vblank_cleanup(dev);
-
 	return 0;
 }