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Wed, 23 Jul 2025 10:26:18 +0000 From: Tarang Raval To: sakari.ailus@linux.intel.com, laurent.pinchart@ideasonboard.com, hverkuil@xs4all.nl Cc: Tarang Raval , Mauro Carvalho Chehab , Ricardo Ribalda , Hans de Goede , Yunke Cao , James Cowgill , Tomi Valkeinen , Lad Prabhakar , Tommaso Merciai , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/4] media: v4l: async: Add devm_v4l2_async_register_subdev_sensor() helper Date: Wed, 23 Jul 2025 15:55:06 +0530 Message-Id: <20250723102515.64585-3-tarang.raval@siliconsignals.io> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250723102515.64585-1-tarang.raval@siliconsignals.io> References: <20250723102515.64585-1-tarang.raval@siliconsignals.io> Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: BM1PR01CA0152.INDPRD01.PROD.OUTLOOK.COM (2603:1096:b00:68::22) To PN3P287MB1829.INDP287.PROD.OUTLOOK.COM (2603:1096:c01:199::7) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PN3P287MB1829:EE_|MA5P287MB4176:EE_ X-MS-Office365-Filtering-Correlation-Id: dd4fe0ba-0760-4ed9-0032-08ddc9d35c17 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|7416014|1800799024|52116014|366016|38350700014; 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charset="utf-8" Add a devm-managed version of v4l2_async_register_subdev_sensor() to simplify sensor sub-device registration and cleanup using devres. Signed-off-by: Tarang Raval --- drivers/media/v4l2-core/v4l2-async.c | 19 +++++++++++++++++++ include/media/v4l2-async.h | 18 ++++++++++++++++++ 2 files changed, 37 insertions(+) diff --git a/drivers/media/v4l2-core/v4l2-async.c b/drivers/media/v4l2-core= /v4l2-async.c index ee884a8221fb..197a01a2d5d6 100644 --- a/drivers/media/v4l2-core/v4l2-async.c +++ b/drivers/media/v4l2-core/v4l2-async.c @@ -7,6 +7,7 @@ =20 #include #include +#include #include #include #include @@ -894,6 +895,24 @@ void v4l2_async_unregister_subdev(struct v4l2_subdev *= sd) } EXPORT_SYMBOL(v4l2_async_unregister_subdev); =20 +static void devm_v4l2_async_unregister_subdev(void *data) +{ + v4l2_async_unregister_subdev(data); +} + +int devm_v4l2_async_register_subdev_sensor(struct device *dev, + struct v4l2_subdev *sd) +{ + int err; + + err =3D v4l2_async_register_subdev_sensor(sd); + if (err) + return err; + + return devm_add_action_or_reset(dev, devm_v4l2_async_unregister_subdev, s= d); +}; +EXPORT_SYMBOL(devm_v4l2_async_register_subdev_sensor); + static void print_waiting_match(struct seq_file *s, struct v4l2_async_match_desc *match) { diff --git a/include/media/v4l2-async.h b/include/media/v4l2-async.h index f26c323e9c96..df0e7337fd22 100644 --- a/include/media/v4l2-async.h +++ b/include/media/v4l2-async.h @@ -343,4 +343,22 @@ v4l2_async_register_subdev_sensor(struct v4l2_subdev *= sd); * @sd: pointer to &struct v4l2_subdev */ void v4l2_async_unregister_subdev(struct v4l2_subdev *sd); + +/** + * devm_v4l2_async_register_subdev_sensor - Managed registration of V4L2 s= ensor sub-device + * + * @dev: Device that manages the lifecycle of the V4L2 sub-device. + * @sd: V4L2 sub-device to be registered as a sensor. + * + * This function registers a V4L2 sub-device using the asynchronous sub-de= vice + * framework and registers a managed cleanup action to be performed automa= tically + * when the device is detached or the driver is unloaded. + * + * This is a managed version of v4l2_async_register_subdev_sensor(), and s= implifies + * resource management using devres. + * + * Return: 0 on success or a negative error code on failure. + */ +int devm_v4l2_async_register_subdev_sensor(struct device *dev, + struct v4l2_subdev *sd); #endif --=20 2.34.1