drm/i915: split encoder get_config calls from crtc get_clock calls

This should help on HSW, where we don't currently have a get_clock call.
Reported-by: Paulo Zanoni <przanoni@gmail.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_display.c

@@ -8377,14 +8377,13 @@ check_crtc_state(struct drm_device *dev)
 				    base.head) {
 			if (encoder->base.crtc != &crtc->base)
 				continue;
-			if (encoder->get_config &&
-			    dev_priv->display.get_clock) {
+			if (encoder->get_config)
 				encoder->get_config(encoder, &pipe_config);
-				dev_priv->display.get_clock(crtc,
-							    &pipe_config);
-			}
 		}
 
+		if (dev_priv->display.get_clock)
+			dev_priv->display.get_clock(crtc, &pipe_config);
+
 		WARN(crtc->active != active,
 		     "crtc active state doesn't match with hw state "
 		     "(expected %i, found %i)\n", crtc->active, active);
@@ -9956,12 +9955,8 @@ static void intel_modeset_readout_hw_state(struct drm_device *dev)
 		if (encoder->get_hw_state(encoder, &pipe)) {
 			crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
 			encoder->base.crtc = &crtc->base;
-			if (encoder->get_config &&
-			    dev_priv->display.get_clock) {
+			if (encoder->get_config)
 				encoder->get_config(encoder, &crtc->config);
-				dev_priv->display.get_clock(crtc,
-							    &crtc->config);
-			}
 		} else {
 			encoder->base.crtc = NULL;
 		}
@@ -9974,6 +9969,15 @@ static void intel_modeset_readout_hw_state(struct drm_device *dev)
 			      pipe);
 	}
 
+	list_for_each_entry(crtc, &dev->mode_config.crtc_list,
+			    base.head) {
+		if (!crtc->active)
+			continue;
+		if (dev_priv->display.get_clock)
+			dev_priv->display.get_clock(crtc,
+						    &crtc->config);
+	}
+
 	list_for_each_entry(connector, &dev->mode_config.connector_list,
 			    base.head) {
 		if (connector->get_hw_state(connector)) {