staging: vboxvideo: Move pin / unpin of fb out of vbox_crtc_set_base_and_mode

Move pin / unpin of fb out of vbox_crtc_set_base_and_mode() so that it can
be used to implement the atomic_update drm_plane_helper_func for the primary
plane.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vboxvideo/vbox_drv.h

@@ -220,6 +220,11 @@ static inline struct vbox_bo *vbox_bo(struct ttm_buffer_object *bo)
 
 #define to_vbox_obj(x) container_of(x, struct vbox_gem_object, base)
 
+static inline u64 vbox_bo_gpu_offset(struct vbox_bo *bo)
+{
+	return bo->bo.offset;
+}
+
 int vbox_dumb_create(struct drm_file *file,
 		     struct drm_device *dev,
 		     struct drm_mode_create_dumb *args);

drivers/staging/vboxvideo/vbox_mode.c

@@ -255,28 +255,18 @@ static void vbox_fb_unpin(struct drm_framebuffer *fb)
 	vbox_bo_unreserve(bo);
 }
 
-static int vbox_crtc_set_base_and_mode(struct drm_crtc *crtc,
-				       struct drm_framebuffer *old_fb,
-				       struct drm_framebuffer *new_fb,
-				       struct drm_display_mode *mode,
-				       int x, int y)
+static void vbox_crtc_set_base_and_mode(struct drm_crtc *crtc,
+					struct drm_framebuffer *fb,
+					struct drm_display_mode *mode,
+					int x, int y)
 {
+	struct vbox_bo *bo = gem_to_vbox_bo(to_vbox_framebuffer(fb)->obj);
 	struct vbox_private *vbox = crtc->dev->dev_private;
 	struct vbox_crtc *vbox_crtc = to_vbox_crtc(crtc);
-	u64 gpu_addr;
-	int ret;
-
-	/* Prepare: pin the new framebuffer bo */
-	ret = vbox_fb_pin(new_fb, TTM_PL_FLAG_VRAM, &gpu_addr);
-	if (ret) {
-		DRM_WARN("Error %d pinning new fb, out of video mem?\n", ret);
-		return ret;
-	}
 
-	/* Commit: Update hardware to use the new fb */
 	mutex_lock(&vbox->hw_mutex);
 
-	vbox_crtc->fb_offset = gpu_addr;
+	vbox_crtc->fb_offset = vbox_bo_gpu_offset(bo);
 
 	/* vbox_do_modeset() checks vbox->single_framebuffer so update it now */
 	if (mode && vbox_set_up_input_mapping(vbox)) {
@@ -299,11 +289,6 @@ static int vbox_crtc_set_base_and_mode(struct drm_crtc *crtc,
 					   vbox->input_mapping_height);
 
 	mutex_unlock(&vbox->hw_mutex);
-
-	/* Cleanup: unpin the old fb */
-	vbox_fb_unpin(old_fb);
-
-	return 0;
 }
 
 static int vbox_crtc_mode_set(struct drm_crtc *crtc,
@@ -311,8 +296,19 @@ static int vbox_crtc_mode_set(struct drm_crtc *crtc,
 			      struct drm_display_mode *adjusted_mode,
 			      int x, int y, struct drm_framebuffer *old_fb)
 {
-	return vbox_crtc_set_base_and_mode(crtc, old_fb, CRTC_FB(crtc),
-					   mode, x, y);
+	int ret;
+
+	ret = vbox_fb_pin(CRTC_FB(crtc), TTM_PL_FLAG_VRAM, NULL);
+	if (ret) {
+		DRM_WARN("Error %d pinning new fb, out of video mem?\n", ret);
+		return ret;
+	}
+
+	vbox_crtc_set_base_and_mode(crtc, CRTC_FB(crtc), mode, x, y);
+
+	vbox_fb_unpin(old_fb);
+
+	return 0;
 }
 
 static int vbox_crtc_page_flip(struct drm_crtc *crtc,
@@ -324,9 +320,15 @@ static int vbox_crtc_page_flip(struct drm_crtc *crtc,
 	unsigned long flags;
 	int rc;
 
-	rc = vbox_crtc_set_base_and_mode(crtc, CRTC_FB(crtc), fb, NULL, 0, 0);
-	if (rc)
+	rc = vbox_fb_pin(fb, TTM_PL_FLAG_VRAM, NULL);
+	if (rc) {
+		DRM_WARN("Error %d pinning new fb, out of video mem?\n", rc);
 		return rc;
+	}
+
+	vbox_crtc_set_base_and_mode(crtc, fb, NULL, 0, 0);
+
+	vbox_fb_unpin(CRTC_FB(crtc));
 
 	spin_lock_irqsave(&crtc->dev->event_lock, flags);
 

drivers/staging/vboxvideo/vbox_ttm.c

@@ -343,11 +343,6 @@ int vbox_bo_create(struct vbox_private *vbox, int size, int align,
 	return ret;
 }
 
-static inline u64 vbox_bo_gpu_offset(struct vbox_bo *bo)
-{
-	return bo->bo.offset;
-}
-
 int vbox_bo_pin(struct vbox_bo *bo, u32 pl_flag, u64 *gpu_addr)
 {
 	struct ttm_operation_ctx ctx = { false, false };