drm: bridge: dw-hdmi: Create connector in the bridge attach operation

The DRM device is not guaranteed by the bridge API to be available
before the attach callback. The driver performs properly at the moment
as it doesn't use the drm_bridge_add() registration method. As this will
be changed later, move connector creation to attach time to ensure
compatibility with the API.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Jose Abreu <joabreu@synopsys.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20170117082910.27023-10-laurent.pinchart+renesas@ideasonboard.com

drivers/gpu/drm/bridge/dw-hdmi.c

@@ -1667,6 +1667,25 @@ static const struct drm_connector_helper_funcs dw_hdmi_connector_helper_funcs =
 	.best_encoder = drm_atomic_helper_best_encoder,
 };
 
+static int dw_hdmi_bridge_attach(struct drm_bridge *bridge)
+{
+	struct dw_hdmi *hdmi = bridge->driver_private;
+	struct drm_encoder *encoder = bridge->encoder;
+	struct drm_connector *connector = &hdmi->connector;
+
+	connector->interlace_allowed = 1;
+	connector->polled = DRM_CONNECTOR_POLL_HPD;
+
+	drm_connector_helper_add(connector, &dw_hdmi_connector_helper_funcs);
+
+	drm_connector_init(bridge->dev, connector, &dw_hdmi_connector_funcs,
+			   DRM_MODE_CONNECTOR_HDMIA);
+
+	drm_mode_connector_attach_encoder(connector, encoder);
+
+	return 0;
+}
+
 static void dw_hdmi_bridge_mode_set(struct drm_bridge *bridge,
 				    struct drm_display_mode *orig_mode,
 				    struct drm_display_mode *mode)
@@ -1704,6 +1723,7 @@ static void dw_hdmi_bridge_enable(struct drm_bridge *bridge)
 }
 
 static const struct drm_bridge_funcs dw_hdmi_bridge_funcs = {
+	.attach = dw_hdmi_bridge_attach,
 	.enable = dw_hdmi_bridge_enable,
 	.disable = dw_hdmi_bridge_disable,
 	.mode_set = dw_hdmi_bridge_mode_set,
@@ -1829,17 +1849,6 @@ static int dw_hdmi_register(struct drm_encoder *encoder, struct dw_hdmi *hdmi)
 		return -EINVAL;
 	}
 
-	hdmi->connector.polled = DRM_CONNECTOR_POLL_HPD;
-
-	drm_connector_helper_add(&hdmi->connector,
-				 &dw_hdmi_connector_helper_funcs);
-
-	drm_connector_init(encoder->dev, &hdmi->connector,
-			   &dw_hdmi_connector_funcs,
-			   DRM_MODE_CONNECTOR_HDMIA);
-
-	drm_mode_connector_attach_encoder(&hdmi->connector, encoder);
-
 	return 0;
 }
 
@@ -1862,8 +1871,6 @@ int dw_hdmi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
 	if (!hdmi)
 		return -ENOMEM;
 
-	hdmi->connector.interlace_allowed = 1;
-
 	hdmi->plat_data = plat_data;
 	hdmi->dev = dev;
 	hdmi->dev_type = plat_data->dev_type;