drm/rockchip: rgb: add video_port parameter to init function

The VOP2 driver has more than one video port, hence the hard-coded
port id will not work anymore. Add an extra parameter for the video
port id to the rockchip_rgb_init function.

Signed-off-by: Michael Riesch <michael.riesch@wolfvision.net>
Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20230124054706.3921383-4-michael.riesch@wolfvision.net

drivers/gpu/drm/rockchip/rockchip_drm_vop.c

@@ -2221,7 +2221,7 @@ static int vop_bind(struct device *dev, struct device *master, void *data)
 		goto err_disable_pm_runtime;
 
 	if (vop->data->feature & VOP_FEATURE_INTERNAL_RGB) {
-		vop->rgb = rockchip_rgb_init(dev, &vop->crtc, vop->drm_dev);
+		vop->rgb = rockchip_rgb_init(dev, &vop->crtc, vop->drm_dev, 0);
 		if (IS_ERR(vop->rgb)) {
 			ret = PTR_ERR(vop->rgb);
 			goto err_disable_pm_runtime;

drivers/gpu/drm/rockchip/rockchip_rgb.c

@@ -72,7 +72,8 @@ struct drm_encoder_helper_funcs rockchip_rgb_encoder_helper_funcs = {
 
 struct rockchip_rgb *rockchip_rgb_init(struct device *dev,
 				       struct drm_crtc *crtc,
-				       struct drm_device *drm_dev)
+				       struct drm_device *drm_dev,
+				       int video_port)
 {
 	struct rockchip_rgb *rgb;
 	struct drm_encoder *encoder;
@@ -90,7 +91,7 @@ struct rockchip_rgb *rockchip_rgb_init(struct device *dev,
 	rgb->dev = dev;
 	rgb->drm_dev = drm_dev;
 
-	port = of_graph_get_port_by_id(dev->of_node, 0);
+	port = of_graph_get_port_by_id(dev->of_node, video_port);
 	if (!port)
 		return ERR_PTR(-EINVAL);
 
@@ -103,8 +104,8 @@ struct rockchip_rgb *rockchip_rgb_init(struct device *dev,
 			continue;
 
 		child_count++;
-		ret = drm_of_find_panel_or_bridge(dev->of_node, 0, endpoint_id,
-						  &panel, &bridge);
+		ret = drm_of_find_panel_or_bridge(dev->of_node, video_port,
+						  endpoint_id, &panel, &bridge);
 		if (!ret) {
 			of_node_put(endpoint);
 			break;

drivers/gpu/drm/rockchip/rockchip_rgb.h

@@ -8,12 +8,14 @@
 #ifdef CONFIG_ROCKCHIP_RGB
 struct rockchip_rgb *rockchip_rgb_init(struct device *dev,
 				       struct drm_crtc *crtc,
-				       struct drm_device *drm_dev);
+				       struct drm_device *drm_dev,
+				       int video_port);
 void rockchip_rgb_fini(struct rockchip_rgb *rgb);
 #else
 static inline struct rockchip_rgb *rockchip_rgb_init(struct device *dev,
 						     struct drm_crtc *crtc,
-						     struct drm_device *drm_dev)
+						     struct drm_device *drm_dev,
+						     int video_port)
 {
 	return NULL;
 }