[PATCH 09/19] v4l: exynos4-is: Use the new media_entity_graph_walk_start() interface

From: Sakari Ailus <sakari.ailus@iki.fi>
To: linux-media@vger.kernel.org
Cc: laurent.pinchart@ideasonboard.com, javier@osg.samsung.com,
	mchehab@osg.samsung.com, hverkuil@xs4all.nl
Subject: [PATCH 09/19] v4l: exynos4-is: Use the new media_entity_graph_walk_start() interface
Date: Tue, 27 Oct 2015 01:01:40 +0200	[thread overview]
Message-ID: <1445900510-1398-10-git-send-email-sakari.ailus@iki.fi> (raw)
In-Reply-To: <1445900510-1398-1-git-send-email-sakari.ailus@iki.fi>

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
---
 drivers/media/platform/exynos4-is/media-dev.c | 31 +++++++++++++++++----------
 drivers/media/platform/exynos4-is/media-dev.h |  1 +
 2 files changed, 21 insertions(+), 11 deletions(-)

diff --git a/drivers/media/platform/exynos4-is/media-dev.c b/drivers/media/platform/exynos4-is/media-dev.c
index d55b4f3..704040c 100644
--- a/drivers/media/platform/exynos4-is/media-dev.c
+++ b/drivers/media/platform/exynos4-is/media-dev.c
@@ -1046,10 +1046,10 @@ static int __fimc_md_modify_pipeline(struct media_entity *entity, bool enable)
 }
 
 /* Locking: called with entity->graph_obj.mdev->graph_mutex mutex held. */
-static int __fimc_md_modify_pipelines(struct media_entity *entity, bool enable)
+static int __fimc_md_modify_pipelines(struct media_entity *entity, bool enable,
+				      struct media_entity_graph *graph)
 {
 	struct media_entity *entity_err = entity;
-	struct media_entity_graph graph;
 	int ret;
 
 	/*
@@ -1058,9 +1058,9 @@ static int __fimc_md_modify_pipelines(struct media_entity *entity, bool enable)
 	 * through active links. This is needed as we cannot power on/off the
 	 * subdevs in random order.
 	 */
-	media_entity_graph_walk_start(&graph, entity);
+	media_entity_graph_walk_start(graph, entity);
 
-	while ((entity = media_entity_graph_walk_next(&graph))) {
+	while ((entity = media_entity_graph_walk_next(graph))) {
 		if (!is_media_entity_v4l2_io(entity))
 			continue;
 
@@ -1071,10 +1071,11 @@ static int __fimc_md_modify_pipelines(struct media_entity *entity, bool enable)
 	}
 
 	return 0;
- err:
-	media_entity_graph_walk_start(&graph, entity_err);
 
-	while ((entity_err = media_entity_graph_walk_next(&graph))) {
+err:
+	media_entity_graph_walk_start(graph, entity_err);
+
+	while ((entity_err = media_entity_graph_walk_next(graph))) {
 		if (!is_media_entity_v4l2_io(entity_err))
 			continue;
 
@@ -1090,21 +1091,29 @@ static int __fimc_md_modify_pipelines(struct media_entity *entity, bool enable)
 static int fimc_md_link_notify(struct media_link *link, unsigned int flags,
 				unsigned int notification)
 {
+	struct media_entity_graph *graph =
+		&container_of(link->graph_obj.mdev, struct fimc_md,
+			      media_dev)->link_setup_graph;
 	struct media_entity *sink = link->sink->entity;
 	int ret = 0;
 
 	/* Before link disconnection */
 	if (notification == MEDIA_DEV_NOTIFY_PRE_LINK_CH) {
+		ret = media_entity_graph_walk_init(graph,
+						   link->graph_obj.mdev);
+		if (ret)
+			return ret;
 		if (!(flags & MEDIA_LNK_FL_ENABLED))
-			ret = __fimc_md_modify_pipelines(sink, false);
+			ret = __fimc_md_modify_pipelines(sink, false, graph);
 #if 0
 		else
 			/* TODO: Link state change validation */
 #endif
 	/* After link activation */
-	} else if (notification == MEDIA_DEV_NOTIFY_POST_LINK_CH &&
-		   (link->flags & MEDIA_LNK_FL_ENABLED)) {
-		ret = __fimc_md_modify_pipelines(sink, true);
+	} else if (notification == MEDIA_DEV_NOTIFY_POST_LINK_CH) {
+		if (link->flags & MEDIA_LNK_FL_ENABLED)
+			ret = __fimc_md_modify_pipelines(sink, true, graph);
+		media_entity_graph_walk_cleanup(graph);
 	}
 
 	return ret ? -EPIPE : 0;
diff --git a/drivers/media/platform/exynos4-is/media-dev.h b/drivers/media/platform/exynos4-is/media-dev.h
index 9a69913..e80c55d 100644
--- a/drivers/media/platform/exynos4-is/media-dev.h
+++ b/drivers/media/platform/exynos4-is/media-dev.h
@@ -154,6 +154,7 @@ struct fimc_md {
 	bool user_subdev_api;
 	spinlock_t slock;
 	struct list_head pipelines;
+	struct media_entity_graph link_setup_graph;
 };
 
 static inline
-- 
2.1.4

