drm/i915: Change use get_new_plane_state instead of existing plane state

The get_existing macros are deprecated and should be replaced by
get_old/new_state for clarity.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180409124656.39886-1-maarten.lankhorst@linux.intel.com
[mlankhorst: Remove useless warn. (Ville)]
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

drivers/gpu/drm/i915/intel_atomic.c

@@ -227,6 +227,7 @@ int intel_atomic_setup_scalers(struct drm_i915_private *dev_priv,
 	struct intel_crtc_scaler_state *scaler_state =
 		&crtc_state->scaler_state;
 	struct drm_atomic_state *drm_state = crtc_state->base.state;
+	struct intel_atomic_state *intel_state = to_intel_atomic_state(drm_state);
 	int num_scalers_need;
 	int i, j;
 
@@ -304,8 +305,8 @@ int intel_atomic_setup_scalers(struct drm_i915_private *dev_priv,
 				continue;
 			}
 
-			plane_state = intel_atomic_get_existing_plane_state(drm_state,
-									    intel_plane);
+			plane_state = intel_atomic_get_new_plane_state(intel_state,
+								       intel_plane);
 			scaler_id = &plane_state->scaler_id;
 		}
 

drivers/gpu/drm/i915/intel_drv.h

@@ -2109,17 +2109,6 @@ intel_atomic_get_existing_crtc_state(struct drm_atomic_state *state,
 		return NULL;
 }
 
-static inline struct intel_plane_state *
-intel_atomic_get_existing_plane_state(struct drm_atomic_state *state,
-				      struct intel_plane *plane)
-{
-	struct drm_plane_state *plane_state;
-
-	plane_state = drm_atomic_get_existing_plane_state(state, &plane->base);
-
-	return to_intel_plane_state(plane_state);
-}
-
 int intel_atomic_setup_scalers(struct drm_i915_private *dev_priv,
 			       struct intel_crtc *intel_crtc,
 			       struct intel_crtc_state *crtc_state);

drivers/gpu/drm/i915/intel_pm.c

@@ -5037,8 +5037,6 @@ skl_ddb_add_affected_planes(struct intel_crtc_state *cstate)
 	struct drm_plane *plane;
 	enum pipe pipe = intel_crtc->pipe;
 
-	WARN_ON(!drm_atomic_get_existing_crtc_state(state, crtc));
-
 	drm_for_each_plane_mask(plane, dev, cstate->base.plane_mask) {
 		enum plane_id plane_id = to_intel_plane(plane)->id;