drm/i915: move detaching scalers to begin_crtc_commit, v2.

This is probably intended to be be done during vblank evasion.
Signed-off-by: NMaarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: NMatt Roper <matthew.d.roper@intel.com>
Tested-by(IVB): Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_atomic.c

@@ -144,9 +144,6 @@ int intel_atomic_commit(struct drm_device *dev,
 	for_each_crtc_in_state(state, crtc, crtc_state, i) {
 		to_intel_crtc(crtc)->config = to_intel_crtc_state(crtc->state);
 
-		if (INTEL_INFO(dev)->gen >= 9)
-			skl_detach_scalers(to_intel_crtc(crtc));
-
 		drm_atomic_helper_commit_planes_on_crtc(crtc_state);
 	}
 

drivers/gpu/drm/i915/intel_display.c

@@ -2925,16 +2925,13 @@ unsigned long intel_plane_obj_offset(struct intel_plane *intel_plane,
 /*
  * This function detaches (aka. unbinds) unused scalers in hardware
  */
-void skl_detach_scalers(struct intel_crtc *intel_crtc)
+static void skl_detach_scalers(struct intel_crtc *intel_crtc)
 {
 	struct drm_device *dev;
 	struct drm_i915_private *dev_priv;
 	struct intel_crtc_scaler_state *scaler_state;
 	int i;
 
-	if (!intel_crtc || !intel_crtc->config)
-		return;
-
 	dev = intel_crtc->base.dev;
 	dev_priv = dev->dev_private;
 	scaler_state = &intel_crtc->config->scaler_state;
@@ -13831,6 +13828,9 @@ static void intel_begin_crtc_commit(struct drm_crtc *crtc)
 		intel_crtc->atomic.evade =
 			intel_pipe_update_start(intel_crtc,
 						&intel_crtc->atomic.start_vbl_count);
+
+	if (!needs_modeset(crtc->state) && INTEL_INFO(dev)->gen >= 9)
+		skl_detach_scalers(intel_crtc);
 }
 
 static void intel_finish_crtc_commit(struct drm_crtc *crtc)

drivers/gpu/drm/i915/intel_drv.h

@@ -1147,7 +1147,6 @@ void intel_mode_from_pipe_config(struct drm_display_mode *mode,
 				 struct intel_crtc_state *pipe_config);
 void intel_crtc_wait_for_pending_flips(struct drm_crtc *crtc);
 void intel_modeset_preclose(struct drm_device *dev, struct drm_file *file);
-void skl_detach_scalers(struct intel_crtc *intel_crtc);
 
 int skl_update_scaler_crtc(struct intel_crtc_state *crtc_state, int force_detach);
 int skl_max_scale(struct intel_crtc *crtc, struct intel_crtc_state *crtc_state);