drm/i915: Consolidate plane 'cleanup' operations (v3)

All plane update functions need to unpin the old framebuffer when
flipping to a new one.  Pull this logic into a separate function to ease
the integration with atomic plane helpers.

v2: Don't wait for vblank if we don't have an old fb to cleanup (Ander)

v3: Really don't wait for vblank if we don't have an old fb to cleanup.
    Previous version only handled this for primary planes; we need the
    same change on cursors/sprites too!  (Ander)

Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_display.c

@@ -11748,6 +11748,31 @@ intel_prepare_plane_fb(struct drm_plane *plane,
 	return ret;
 }
 
+/**
+ * intel_cleanup_plane_fb - Cleans up an fb after plane use
+ * @plane: drm plane to clean up for
+ * @fb: old framebuffer that was on plane
+ *
+ * Cleans up a framebuffer that has just been removed from a plane.
+ */
+void
+intel_cleanup_plane_fb(struct drm_plane *plane,
+		       struct drm_framebuffer *fb)
+{
+	struct drm_device *dev = plane->dev;
+	struct drm_i915_gem_object *obj = intel_fb_obj(fb);
+
+	if (WARN_ON(!obj))
+		return;
+
+	if (plane->type != DRM_PLANE_TYPE_CURSOR ||
+	    !INTEL_INFO(dev)->cursor_needs_physical) {
+		mutex_lock(&dev->struct_mutex);
+		intel_unpin_fb_obj(obj);
+		mutex_unlock(&dev->struct_mutex);
+	}
+}
+
 static int
 intel_check_primary_plane(struct drm_plane *plane,
 			  struct intel_plane_state *state)
@@ -11775,9 +11800,7 @@ intel_commit_primary_plane(struct drm_plane *plane,
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 	enum pipe pipe = intel_crtc->pipe;
-	struct drm_framebuffer *old_fb = plane->fb;
 	struct drm_i915_gem_object *obj = intel_fb_obj(fb);
-	struct drm_i915_gem_object *old_obj = intel_fb_obj(plane->fb);
 	struct intel_plane *intel_plane = to_intel_plane(plane);
 	struct drm_rect *src = &state->src;
 
@@ -11848,15 +11871,6 @@ intel_commit_primary_plane(struct drm_plane *plane,
 		intel_update_fbc(dev);
 		mutex_unlock(&dev->struct_mutex);
 	}
-
-	if (old_fb && old_fb != fb) {
-		if (intel_crtc->active)
-			intel_wait_for_vblank(dev, intel_crtc->pipe);
-
-		mutex_lock(&dev->struct_mutex);
-		intel_unpin_fb_obj(old_obj);
-		mutex_unlock(&dev->struct_mutex);
-	}
 }
 
 static int
@@ -11866,6 +11880,7 @@ intel_primary_plane_setplane(struct drm_plane *plane, struct drm_crtc *crtc,
 			     uint32_t src_x, uint32_t src_y,
 			     uint32_t src_w, uint32_t src_h)
 {
+	struct drm_device *dev = plane->dev;
 	struct drm_framebuffer *old_fb = plane->fb;
 	struct intel_plane_state state;
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
@@ -11913,6 +11928,12 @@ intel_primary_plane_setplane(struct drm_plane *plane, struct drm_crtc *crtc,
 
 	intel_commit_primary_plane(plane, &state);
 
+	if (fb != old_fb && old_fb) {
+		if (intel_crtc->active)
+			intel_wait_for_vblank(dev, intel_crtc->pipe);
+		intel_cleanup_plane_fb(plane, old_fb);
+	}
+
 	return 0;
 }
 
@@ -12095,14 +12116,6 @@ intel_commit_cursor_plane(struct drm_plane *plane,
 	else
 		addr = obj->phys_handle->busaddr;
 
-	if (intel_crtc->cursor_bo) {
-		if (!INTEL_INFO(dev)->cursor_needs_physical) {
-			mutex_lock(&dev->struct_mutex);
-			intel_unpin_fb_obj(intel_crtc->cursor_bo);
-			mutex_unlock(&dev->struct_mutex);
-		}
-	}
-
 	intel_crtc->cursor_addr = addr;
 	intel_crtc->cursor_bo = obj;
 update:
@@ -12127,6 +12140,7 @@ intel_cursor_plane_update(struct drm_plane *plane, struct drm_crtc *crtc,
 			  uint32_t src_x, uint32_t src_y,
 			  uint32_t src_w, uint32_t src_h)
 {
+	struct drm_device *dev = plane->dev;
 	struct drm_framebuffer *old_fb = plane->fb;
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 	struct intel_plane_state state;
@@ -12167,6 +12181,12 @@ intel_cursor_plane_update(struct drm_plane *plane, struct drm_crtc *crtc,
 
 	intel_commit_cursor_plane(plane, &state);
 
+	if (fb != old_fb && old_fb) {
+		if (intel_crtc->active)
+			intel_wait_for_vblank(dev, intel_crtc->pipe);
+		intel_cleanup_plane_fb(plane, old_fb);
+	}
+
 	return 0;
 }
 

drivers/gpu/drm/i915/intel_drv.h

@@ -924,6 +924,8 @@ void intel_finish_page_flip_plane(struct drm_device *dev, int plane);
 void intel_check_page_flip(struct drm_device *dev, int pipe);
 int intel_prepare_plane_fb(struct drm_plane *plane,
 			   struct drm_framebuffer *fb);
+void intel_cleanup_plane_fb(struct drm_plane *plane,
+			    struct drm_framebuffer *fb);
 
 /* shared dpll functions */
 struct intel_shared_dpll *intel_crtc_to_shared_dpll(struct intel_crtc *crtc);

drivers/gpu/drm/i915/intel_sprite.c

@@ -1268,7 +1268,6 @@ intel_commit_sprite_plane(struct drm_plane *plane,
 	enum pipe pipe = intel_crtc->pipe;
 	struct drm_framebuffer *fb = state->base.fb;
 	struct drm_i915_gem_object *obj = intel_fb_obj(fb);
-	struct drm_i915_gem_object *old_obj = intel_plane->obj;
 	int crtc_x, crtc_y;
 	unsigned int crtc_w, crtc_h;
 	uint32_t src_x, src_y, src_w, src_h;
@@ -1326,23 +1325,6 @@ intel_commit_sprite_plane(struct drm_plane *plane,
 		if (!primary_was_enabled && primary_enabled)
 			intel_post_enable_primary(crtc);
 	}
-
-	/* Unpin old obj after new one is active to avoid ugliness */
-	if (old_obj && old_obj != obj) {
-
-		/*
-		 * It's fairly common to simply update the position of
-		 * an existing object.  In that case, we don't need to
-		 * wait for vblank to avoid ugliness, we only need to
-		 * do the pin & ref bookkeeping.
-		 */
-		if (intel_crtc->active)
-			intel_wait_for_vblank(dev, intel_crtc->pipe);
-
-		mutex_lock(&dev->struct_mutex);
-		intel_unpin_fb_obj(old_obj);
-		mutex_unlock(&dev->struct_mutex);
-	}
 }
 
 static int
@@ -1352,6 +1334,7 @@ intel_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
 		   uint32_t src_x, uint32_t src_y,
 		   uint32_t src_w, uint32_t src_h)
 {
+	struct drm_device *dev = plane->dev;
 	struct drm_framebuffer *old_fb = plane->fb;
 	struct intel_plane_state state;
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
@@ -1390,6 +1373,13 @@ intel_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
 	}
 
 	intel_commit_sprite_plane(plane, &state);
+
+	if (fb != old_fb && old_fb) {
+		if (intel_crtc->active)
+			intel_wait_for_vblank(dev, intel_crtc->pipe);
+		intel_cleanup_plane_fb(plane, old_fb);
+	}
+
 	return 0;
 }