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Message-Id: <1530298220-5097-5-git-send-email-steve_longerbeam@mentor.com>
Date: Fri, 29 Jun 2018 11:49:48 -0700
From: Steve Longerbeam <slongerbeam@...il.com>
To: linux-media@...r.kernel.org
Cc: Steve Longerbeam <steve_longerbeam@...tor.com>,
linux-kernel@...r.kernel.org
Subject: [PATCH v5 04/17] media: v4l2: async: Add convenience functions to allocate and add asd's
Add these convenience functions, which allocate an asd of match type
fwnode, i2c, or device-name, of size asd_struct_size, and then adds
them to the notifier asd_list.
Signed-off-by: Steve Longerbeam <steve_longerbeam@...tor.com>
---
drivers/media/v4l2-core/v4l2-async.c | 76 ++++++++++++++++++++++++++++++++++++
include/media/v4l2-async.h | 62 +++++++++++++++++++++++++++++
2 files changed, 138 insertions(+)
diff --git a/drivers/media/v4l2-core/v4l2-async.c b/drivers/media/v4l2-core/v4l2-async.c
index 48d66ae..17f32d9 100644
--- a/drivers/media/v4l2-core/v4l2-async.c
+++ b/drivers/media/v4l2-core/v4l2-async.c
@@ -659,6 +659,82 @@ int v4l2_async_notifier_add_subdev(struct v4l2_async_notifier *notifier,
}
EXPORT_SYMBOL_GPL(v4l2_async_notifier_add_subdev);
+struct v4l2_async_subdev *
+v4l2_async_notifier_add_fwnode_subdev(struct v4l2_async_notifier *notifier,
+ struct fwnode_handle *fwnode,
+ unsigned int asd_struct_size)
+{
+ struct v4l2_async_subdev *asd;
+ int ret;
+
+ asd = kzalloc(asd_struct_size, GFP_KERNEL);
+ if (!asd)
+ return ERR_PTR(-ENOMEM);
+
+ asd->match_type = V4L2_ASYNC_MATCH_FWNODE;
+ asd->match.fwnode = fwnode;
+
+ ret = v4l2_async_notifier_add_subdev(notifier, asd);
+ if (ret) {
+ kfree(asd);
+ return ERR_PTR(ret);
+ }
+
+ return asd;
+}
+EXPORT_SYMBOL_GPL(v4l2_async_notifier_add_fwnode_subdev);
+
+struct v4l2_async_subdev *
+v4l2_async_notifier_add_i2c_subdev(struct v4l2_async_notifier *notifier,
+ int adapter_id, unsigned short address,
+ unsigned int asd_struct_size)
+{
+ struct v4l2_async_subdev *asd;
+ int ret;
+
+ asd = kzalloc(asd_struct_size, GFP_KERNEL);
+ if (!asd)
+ return ERR_PTR(-ENOMEM);
+
+ asd->match_type = V4L2_ASYNC_MATCH_I2C;
+ asd->match.i2c.adapter_id = adapter_id;
+ asd->match.i2c.address = address;
+
+ ret = v4l2_async_notifier_add_subdev(notifier, asd);
+ if (ret) {
+ kfree(asd);
+ return ERR_PTR(ret);
+ }
+
+ return asd;
+}
+EXPORT_SYMBOL_GPL(v4l2_async_notifier_add_i2c_subdev);
+
+struct v4l2_async_subdev *
+v4l2_async_notifier_add_devname_subdev(struct v4l2_async_notifier *notifier,
+ const char *device_name,
+ unsigned int asd_struct_size)
+{
+ struct v4l2_async_subdev *asd;
+ int ret;
+
+ asd = kzalloc(asd_struct_size, GFP_KERNEL);
+ if (!asd)
+ return ERR_PTR(-ENOMEM);
+
+ asd->match_type = V4L2_ASYNC_MATCH_DEVNAME;
+ asd->match.device_name = device_name;
+
+ ret = v4l2_async_notifier_add_subdev(notifier, asd);
+ if (ret) {
+ kfree(asd);
+ return ERR_PTR(ret);
+ }
+
+ return asd;
+}
+EXPORT_SYMBOL_GPL(v4l2_async_notifier_add_devname_subdev);
+
int v4l2_async_register_subdev(struct v4l2_subdev *sd)
{
struct v4l2_async_notifier *subdev_notifier;
diff --git a/include/media/v4l2-async.h b/include/media/v4l2-async.h
index 6e752ef..5394361 100644
--- a/include/media/v4l2-async.h
+++ b/include/media/v4l2-async.h
@@ -167,6 +167,68 @@ int v4l2_async_notifier_add_subdev(struct v4l2_async_notifier *notifier,
struct v4l2_async_subdev *asd);
/**
+ * v4l2_async_notifier_add_fwnode_subdev - Allocate and add a fwnode async
+ * subdev to the notifier's master asd_list.
+ *
+ * @notifier: pointer to &struct v4l2_async_notifier
+ * @fwnode: fwnode handle of the sub-device to be matched
+ * @asd_struct_size: size of the driver's async sub-device struct, including
+ * sizeof(struct v4l2_async_subdev). The &struct
+ * v4l2_async_subdev shall be the first member of
+ * the driver's async sub-device struct, i.e. both
+ * begin at the same memory address.
+ *
+ * This can be used before registering a notifier to add a
+ * fwnode-matched asd to the notifiers master asd_list. If the caller
+ * uses this method to compose an asd list, it must never allocate
+ * or place asd's in the @subdevs array.
+ */
+struct v4l2_async_subdev *
+v4l2_async_notifier_add_fwnode_subdev(struct v4l2_async_notifier *notifier,
+ struct fwnode_handle *fwnode,
+ unsigned int asd_struct_size);
+
+/**
+ * v4l2_async_notifier_add_i2c_subdev - Allocate and add an i2c async
+ * subdev to the notifier's master asd_list.
+ *
+ * @notifier: pointer to &struct v4l2_async_notifier
+ * @adapter_id: I2C adapter ID to be matched
+ * @address: I2C address of sub-device to be matched
+ * @asd_struct_size: size of the driver's async sub-device struct, including
+ * sizeof(struct v4l2_async_subdev). The &struct
+ * v4l2_async_subdev shall be the first member of
+ * the driver's async sub-device struct, i.e. both
+ * begin at the same memory address.
+ *
+ * Same as above but for I2C matched sub-devices.
+ */
+struct v4l2_async_subdev *
+v4l2_async_notifier_add_i2c_subdev(struct v4l2_async_notifier *notifier,
+ int adapter_id, unsigned short address,
+ unsigned int asd_struct_size);
+
+/**
+ * v4l2_async_notifier_add_devname_subdev - Allocate and add a device-name
+ * async subdev to the notifier's master asd_list.
+ *
+ * @notifier: pointer to &struct v4l2_async_notifier
+ * @device_name: device name string to be matched
+ * @asd_struct_size: size of the driver's async sub-device struct, including
+ * sizeof(struct v4l2_async_subdev). The &struct
+ * v4l2_async_subdev shall be the first member of
+ * the driver's async sub-device struct, i.e. both
+ * begin at the same memory address.
+ *
+ * Same as above but for device-name matched sub-devices.
+ */
+struct v4l2_async_subdev *
+v4l2_async_notifier_add_devname_subdev(struct v4l2_async_notifier *notifier,
+ const char *device_name,
+ unsigned int asd_struct_size);
+
+
+/**
* v4l2_async_notifier_register - registers a subdevice asynchronous notifier
*
* @v4l2_dev: pointer to &struct v4l2_device
--
2.7.4
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