[PATCH v2 16/55] media: rkisp1: Create internal links at probe time

[Laurent Pinchart]

There's no need to wait until all async subdevs are bound before
creating internal links. Create them at probe time.

Signed-off-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
Reviewed-by: Dafna Hirschfeld <dafna at fastmail.com>
---
 .../platform/rockchip/rkisp1/rkisp1-dev.c     | 105 ++++++++----------
 1 file changed, 49 insertions(+), 56 deletions(-)

diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
index 1b3c3881ca89..4400dc0117a5 100644
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
@@ -109,50 +109,6 @@ struct rkisp1_isr_data {
  * Sensor DT bindings
  */
 
-static int rkisp1_create_links(struct rkisp1_device *rkisp1)
-{
-	unsigned int i;
-	int ret;
-
-	/* create ISP->RSZ->CAP links */
-	for (i = 0; i < 2; i++) {
-		struct media_entity *resizer =
-			&rkisp1->resizer_devs[i].sd.entity;
-		struct media_entity *capture =
-			&rkisp1->capture_devs[i].vnode.vdev.entity;
-
-		ret = media_create_pad_link(&rkisp1->isp.sd.entity,
-					    RKISP1_ISP_PAD_SOURCE_VIDEO,
-					    resizer, RKISP1_RSZ_PAD_SINK,
-					    MEDIA_LNK_FL_ENABLED);
-		if (ret)
-			return ret;
-
-		ret = media_create_pad_link(resizer, RKISP1_RSZ_PAD_SRC,
-					    capture, 0,
-					    MEDIA_LNK_FL_ENABLED |
-					    MEDIA_LNK_FL_IMMUTABLE);
-		if (ret)
-			return ret;
-	}
-
-	/* params links */
-	ret = media_create_pad_link(&rkisp1->params.vnode.vdev.entity, 0,
-				    &rkisp1->isp.sd.entity,
-				    RKISP1_ISP_PAD_SINK_PARAMS,
-				    MEDIA_LNK_FL_ENABLED |
-				    MEDIA_LNK_FL_IMMUTABLE);
-	if (ret)
-		return ret;
-
-	/* 3A stats links */
-	return media_create_pad_link(&rkisp1->isp.sd.entity,
-				     RKISP1_ISP_PAD_SOURCE_STATS,
-				     &rkisp1->stats.vnode.vdev.entity, 0,
-				     MEDIA_LNK_FL_ENABLED |
-				     MEDIA_LNK_FL_IMMUTABLE);
-}
-
 static int rkisp1_subdev_notifier_bound(struct v4l2_async_notifier *notifier,
 					struct v4l2_subdev *sd,
 					struct v4l2_async_subdev *asd)
@@ -210,19 +166,8 @@ static int rkisp1_subdev_notifier_complete(struct v4l2_async_notifier *notifier)
 {
 	struct rkisp1_device *rkisp1 =
 		container_of(notifier, struct rkisp1_device, notifier);
-	int ret;
 
-	ret = rkisp1_create_links(rkisp1);
-	if (ret)
-		return ret;
-
-	ret = v4l2_device_register_subdev_nodes(&rkisp1->v4l2_dev);
-	if (ret)
-		return ret;
-
-	dev_dbg(rkisp1->dev, "Async subdev notifier completed\n");
-
-	return 0;
+	return v4l2_device_register_subdev_nodes(&rkisp1->v4l2_dev);
 }
 
 static const struct v4l2_async_notifier_operations rkisp1_subdev_notifier_ops = {
@@ -332,6 +277,50 @@ static const struct dev_pm_ops rkisp1_pm_ops = {
  * Core
  */
 
+static int rkisp1_create_links(struct rkisp1_device *rkisp1)
+{
+	unsigned int i;
+	int ret;
+
+	/* create ISP->RSZ->CAP links */
+	for (i = 0; i < 2; i++) {
+		struct media_entity *resizer =
+			&rkisp1->resizer_devs[i].sd.entity;
+		struct media_entity *capture =
+			&rkisp1->capture_devs[i].vnode.vdev.entity;
+
+		ret = media_create_pad_link(&rkisp1->isp.sd.entity,
+					    RKISP1_ISP_PAD_SOURCE_VIDEO,
+					    resizer, RKISP1_RSZ_PAD_SINK,
+					    MEDIA_LNK_FL_ENABLED);
+		if (ret)
+			return ret;
+
+		ret = media_create_pad_link(resizer, RKISP1_RSZ_PAD_SRC,
+					    capture, 0,
+					    MEDIA_LNK_FL_ENABLED |
+					    MEDIA_LNK_FL_IMMUTABLE);
+		if (ret)
+			return ret;
+	}
+
+	/* params links */
+	ret = media_create_pad_link(&rkisp1->params.vnode.vdev.entity, 0,
+				    &rkisp1->isp.sd.entity,
+				    RKISP1_ISP_PAD_SINK_PARAMS,
+				    MEDIA_LNK_FL_ENABLED |
+				    MEDIA_LNK_FL_IMMUTABLE);
+	if (ret)
+		return ret;
+
+	/* 3A stats links */
+	return media_create_pad_link(&rkisp1->isp.sd.entity,
+				     RKISP1_ISP_PAD_SOURCE_STATS,
+				     &rkisp1->stats.vnode.vdev.entity, 0,
+				     MEDIA_LNK_FL_ENABLED |
+				     MEDIA_LNK_FL_IMMUTABLE);
+}
+
 static void rkisp1_entities_unregister(struct rkisp1_device *rkisp1)
 {
 	rkisp1_params_unregister(rkisp1);
@@ -365,6 +354,10 @@ static int rkisp1_entities_register(struct rkisp1_device *rkisp1)
 	if (ret)
 		goto error;
 
+	ret = rkisp1_create_links(rkisp1);
+	if (ret)
+		goto error;
+
 	ret = rkisp1_subdev_notifier(rkisp1);
 	if (ret) {
 		dev_err(rkisp1->dev,
-- 
Regards,

Laurent Pinchart