drm/atomic: atomic connector properties

Expose the core connector state as properties so it can be updated via
atomic ioctl.

Signed-off-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

Documentation/DocBook/drm.tmpl

@@ -2572,8 +2572,8 @@ void intel_crt_init(struct drm_device *dev)
 	<td valign="top" >Description/Restrictions</td>
 	</tr>
 	<tr>
-	<td rowspan="35" valign="top" >DRM</td>
-	<td rowspan="4" valign="top" >Generic</td>
+	<td rowspan="36" valign="top" >DRM</td>
+	<td rowspan="5" valign="top" >Connector</td>
 	<td valign="top" >“EDID”</td>
 	<td valign="top" >BLOB | IMMUTABLE</td>
 	<td valign="top" >0</td>
@@ -2602,6 +2602,13 @@ void intel_crt_init(struct drm_device *dev)
 	<td valign="top" >Contains tiling information for a connector.</td>
 	</tr>
 	<tr>
+	<td valign="top" >“CRTC_ID”</td>
+	<td valign="top" >OBJECT</td>
+	<td valign="top" >DRM_MODE_OBJECT_CRTC</td>
+	<td valign="top" >Connector</td>
+	<td valign="top" >CRTC that connector is attached to (atomic)</td>
+	</tr>
+	<tr>
 	<td rowspan="11" valign="top" >Plane</td>
 	<td valign="top" >“type”</td>
 	<td valign="top" >ENUM | IMMUTABLE</td>

drivers/gpu/drm/drm_atomic.c

@@ -627,7 +627,10 @@ int drm_atomic_connector_set_property(struct drm_connector *connector,
 	struct drm_device *dev = connector->dev;
 	struct drm_mode_config *config = &dev->mode_config;
 
-	if (property == config->dpms_property) {
+	if (property == config->prop_crtc_id) {
+		struct drm_crtc *crtc = drm_crtc_find(dev, val);
+		return drm_atomic_set_crtc_for_connector(state, crtc);
+	} else if (property == config->dpms_property) {
 		/* setting DPMS property requires special handling, which
 		 * is done in legacy setprop path for us.  Disallow (for
 		 * now?) atomic writes to DPMS property:
@@ -665,7 +668,9 @@ int drm_atomic_connector_get_property(struct drm_connector *connector,
 	struct drm_device *dev = connector->dev;
 	struct drm_mode_config *config = &dev->mode_config;
 
-	if (property == config->dpms_property) {
+	if (property == config->prop_crtc_id) {
+		*val = (state->crtc) ? state->crtc->base.id : 0;
+	} else if (property == config->dpms_property) {
 		*val = connector->dpms;
 	} else if (connector->funcs->atomic_get_property) {
 		return connector->funcs->atomic_get_property(connector,

drivers/gpu/drm/drm_crtc.c

@@ -831,6 +831,7 @@ int drm_connector_init(struct drm_device *dev,
 		       const struct drm_connector_funcs *funcs,
 		       int connector_type)
 {
+	struct drm_mode_config *config = &dev->mode_config;
 	int ret;
 	struct ida *connector_ida =
 		&drm_connector_enum_list[connector_type].ida;
@@ -869,16 +870,20 @@ int drm_connector_init(struct drm_device *dev,
 
 	/* We should add connectors at the end to avoid upsetting the connector
 	 * index too much. */
-	list_add_tail(&connector->head, &dev->mode_config.connector_list);
-	dev->mode_config.num_connector++;
+	list_add_tail(&connector->head, &config->connector_list);
+	config->num_connector++;
 
 	if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL)
 		drm_object_attach_property(&connector->base,
-					      dev->mode_config.edid_property,
+					      config->edid_property,
 					      0);
 
 	drm_object_attach_property(&connector->base,
-				      dev->mode_config.dpms_property, 0);
+				      config->dpms_property, 0);
+
+	if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
+		drm_object_attach_property(&connector->base, config->prop_crtc_id, 0);
+	}
 
 	connector->debugfs_entry = NULL;