drm/atomic: If margins are updated, update all planes.

Margins may be implemented by scaling the planes, but as there
is no way of intercepting the set_property for a standard property,
and all planes are checked in drm_atomic_check_only before the
connectors, there's now way to add the planes into the state
from the driver.

If the margin properties change, add all corresponding planes to
the state.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>

drivers/gpu/drm/drm_atomic_uapi.c

@@ -679,6 +679,7 @@ static int drm_atomic_connector_set_property(struct drm_connector *connector,
 {
 	struct drm_device *dev = connector->dev;
 	struct drm_mode_config *config = &dev->mode_config;
+	bool margins_updated = false;
 	bool replaced = false;
 	int ret;
 
@@ -698,12 +699,16 @@ static int drm_atomic_connector_set_property(struct drm_connector *connector,
 		state->tv.subconnector = val;
 	} else if (property == config->tv_left_margin_property) {
 		state->tv.margins.left = val;
+		margins_updated = true;
 	} else if (property == config->tv_right_margin_property) {
 		state->tv.margins.right = val;
+		margins_updated = true;
 	} else if (property == config->tv_top_margin_property) {
 		state->tv.margins.top = val;
+		margins_updated = true;
 	} else if (property == config->tv_bottom_margin_property) {
 		state->tv.margins.bottom = val;
+		margins_updated = true;
 	} else if (property == config->tv_mode_property) {
 		state->tv.mode = val;
 	} else if (property == config->tv_brightness_property) {
@@ -784,6 +789,12 @@ static int drm_atomic_connector_set_property(struct drm_connector *connector,
 		return -EINVAL;
 	}
 
+	if (margins_updated && state->crtc) {
+		ret = drm_atomic_add_affected_planes(state->state, state->crtc);
+
+		return ret;
+	}
+
 	return 0;
 }