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From: Jacopo Mondi <jacopo+renesas@jmondi.org>
To: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Cc: Jacopo Mondi <jacopo+renesas@jmondi.org>,
	linux-media@vger.kernel.org, linux-renesas-soc@vger.kernel.org
Subject: [RFC 2/4] media: v4l2-async: Add notifier flags
Date: Thu, 17 Jun 2021 19:16:09 +0200	[thread overview]
Message-ID: <20210617171611.80542-3-jacopo+renesas@jmondi.org> (raw)
In-Reply-To: <20210617171611.80542-1-jacopo+renesas@jmondi.org>

Add a 'flags' field to the async notifier structure and define the
V4L2_ASYNC_NOTIFIER_SKIP_POST_REGISTER flag.

Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
---
 drivers/media/v4l2-core/v4l2-async.c |  1 +
 include/media/v4l2-async.h           | 10 ++++++++++
 2 files changed, 11 insertions(+)

diff --git a/drivers/media/v4l2-core/v4l2-async.c b/drivers/media/v4l2-core/v4l2-async.c
index cd9e78c63791..0836e01e59ca 100644
--- a/drivers/media/v4l2-core/v4l2-async.c
+++ b/drivers/media/v4l2-core/v4l2-async.c
@@ -472,6 +472,7 @@ static int v4l2_async_notifier_asd_valid(struct v4l2_async_notifier *notifier,
 void v4l2_async_notifier_init(struct v4l2_async_notifier *notifier)
 {
 	INIT_LIST_HEAD(&notifier->asd_list);
+	notifier->flags = 0;
 }
 EXPORT_SYMBOL(v4l2_async_notifier_init);
 
diff --git a/include/media/v4l2-async.h b/include/media/v4l2-async.h
index 5b275a845c20..3f0627bf8894 100644
--- a/include/media/v4l2-async.h
+++ b/include/media/v4l2-async.h
@@ -92,6 +92,13 @@ struct v4l2_async_notifier_operations {
 		       struct v4l2_async_subdev *asd);
 };
 
+/*
+ * Set this flag to instruct the core framework not to call the post_register()
+ * core operation. The driver that registered the notifier will take care to
+ * do so eventually.
+ */
+#define V4L2_ASYNC_NOTIFIER_SKIP_POST_REGISTER		(1U << 0)
+
 /**
  * struct v4l2_async_notifier - v4l2_device notifier data
  *
@@ -103,6 +110,8 @@ struct v4l2_async_notifier_operations {
  * @waiting:	list of struct v4l2_async_subdev, waiting for their drivers
  * @done:	list of struct v4l2_subdev, already probed
  * @list:	member in a global list of notifiers
+ * @flags:	notifier's flags. Can be:
+ * 	%V4L2_ASYNC_NOTIFIER_SKIP_POST_REGISTER
  */
 struct v4l2_async_notifier {
 	const struct v4l2_async_notifier_operations *ops;
@@ -113,6 +122,7 @@ struct v4l2_async_notifier {
 	struct list_head waiting;
 	struct list_head done;
 	struct list_head list;
+	u32 flags;
 };
 
 /**
-- 
2.31.1


  parent reply	other threads:[~2021-06-17 17:15 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-17 17:16 [RFC 0/4] media: Introduce post_register() subdev operation Jacopo Mondi
2021-06-17 17:16 ` [RFC 1/4] media: v4l2-subdev: Introduce post_register() core op Jacopo Mondi
2021-06-17 17:16 ` Jacopo Mondi [this message]
2021-07-06  7:47   ` [RFC 2/4] media: v4l2-async: Add notifier flags Hans Verkuil
2021-06-17 17:16 ` [RFC 3/4] media: v4l2-async: Call post_register() subdev op Jacopo Mondi
2021-06-17 17:16 ` [RFC 4/4] media: i2c: gmsl: Defer camera intialization Jacopo Mondi
2021-06-18 10:21 ` [RFC 0/4] media: Introduce post_register() subdev operation Hans Verkuil
2021-07-05 14:58   ` Jacopo Mondi

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