From: Jacopo Mondi <jacopo@jmondi.org>
To: Mauro Carvalho Chehab <mchehab@kernel.org>,
Hans Verkuil <hverkuil-cisco@xs4all.nl>,
Sakari Ailus <sakari.ailus@linux.intel.com>,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
tfiga@google.com, pavel@ucw.cz
Cc: Jacopo Mondi <jacopo@jmondi.org>,
linux-media@vger.kernel.org (open list:MEDIA INPUT
INFRASTRUCTURE (V4L/DVB))
Subject: [PATCH v3 06/11] media: v4l2-fwnode: Add helper to parse device properties
Date: Thu, 12 Sep 2019 22:10:50 +0200 [thread overview]
Message-ID: <20190912201055.13964-7-jacopo@jmondi.org> (raw)
In-Reply-To: <20190912201055.13964-1-jacopo@jmondi.org>
Add an helper function to parse common device properties in the same
way as v4l2_fwnode_endpoint_parse() parses common endpoint properties.
Initially parse the 'rotation' and 'location' properties from the
firmware interface.
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
---
drivers/media/v4l2-core/v4l2-fwnode.c | 42 +++++++++++++++++++++++++++
include/media/v4l2-fwnode.h | 40 +++++++++++++++++++++++++
2 files changed, 82 insertions(+)
diff --git a/drivers/media/v4l2-core/v4l2-fwnode.c b/drivers/media/v4l2-core/v4l2-fwnode.c
index 3bd1888787eb..d325a2d5c088 100644
--- a/drivers/media/v4l2-core/v4l2-fwnode.c
+++ b/drivers/media/v4l2-core/v4l2-fwnode.c
@@ -595,6 +595,48 @@ void v4l2_fwnode_put_link(struct v4l2_fwnode_link *link)
}
EXPORT_SYMBOL_GPL(v4l2_fwnode_put_link);
+int v4l2_fwnode_device_parse(struct device *dev,
+ struct v4l2_fwnode_device_properties *props)
+{
+ struct fwnode_handle *fwnode = dev_fwnode(dev);
+ u32 val;
+ int ret;
+
+ memset(props, 0, sizeof(*props));
+
+ dev_dbg(dev, "===== begin V4L2 device properties parsing\n");
+ ret = fwnode_property_read_u32(fwnode, "location", &val);
+ if (!ret) {
+ switch (val) {
+ case V4L2_FWNODE_LOCATION_FRONT:
+ case V4L2_FWNODE_LOCATION_BACK:
+ case V4L2_FWNODE_LOCATION_EXTERNAL:
+ break;
+ default:
+ dev_warn(dev, "Unsupported device location: %u\n", val);
+ return -EINVAL;
+ }
+
+ props->location = val;
+ dev_dbg(dev, "device location: %u\n", val);
+ }
+
+ ret = fwnode_property_read_u32(fwnode, "rotation", &val);
+ if (!ret) {
+ if (val >= 360 || val % 90) {
+ dev_warn(dev, "Unsupported device rotation: %u\n", val);
+ return -EINVAL;
+ }
+
+ props->rotation = val;
+ dev_dbg(dev, "device rotation: %u\n", val);
+ }
+ dev_dbg(dev, "===== end V4L2 device properties parsing\n");
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_fwnode_device_parse);
+
static int
v4l2_async_notifier_fwnode_parse_endpoint(struct device *dev,
struct v4l2_async_notifier *notifier,
diff --git a/include/media/v4l2-fwnode.h b/include/media/v4l2-fwnode.h
index f6a7bcd13197..86af6d9d11fe 100644
--- a/include/media/v4l2-fwnode.h
+++ b/include/media/v4l2-fwnode.h
@@ -109,6 +109,28 @@ struct v4l2_fwnode_endpoint {
unsigned int nr_of_link_frequencies;
};
+/**
+ * enum v4l2_fwnode_location - possible device locations
+ * @V4L2_FWNODE_LOCATION_FRONT: device installed on the front side
+ * @V4L2_FWNODE_LOCATION_BACK: device installed on the back side
+ * @V4L2_FWNODE_LOCATION_EXTERNAL: device externally located
+ */
+enum v4l2_fwnode_location {
+ V4L2_FWNODE_LOCATION_FRONT,
+ V4L2_FWNODE_LOCATION_BACK,
+ V4L2_FWNODE_LOCATION_EXTERNAL
+};
+
+/**
+ * struct v4l2_fwnode_device_properties - fwnode device properties
+ * @location: device location. See &enum v4l2_fwnode_location
+ * @rotation: device rotation
+ */
+struct v4l2_fwnode_device_properties {
+ enum v4l2_fwnode_location location;
+ unsigned int rotation;
+};
+
/**
* struct v4l2_fwnode_link - a link between two endpoints
* @local_node: pointer to device_node of this endpoint
@@ -233,6 +255,24 @@ int v4l2_fwnode_parse_link(struct fwnode_handle *fwnode,
*/
void v4l2_fwnode_put_link(struct v4l2_fwnode_link *link);
+/**
+ * v4l2_fwnode_device_parse() - parse fwnode device properties
+ * @dev: pointer to &struct device
+ * @props: pointer to &struct v4l2_fwnode_device_properties where to store the
+ * parsed properties values
+ *
+ * This function parses and validates the V4L2 fwnode device properties from
+ * the firmware interface. It is responsibility of the caller to allocate a
+ * valid @struct v4l2_fwnode_device_properties structure and provide a pointer
+ * to it in the @props parameter.
+ *
+ * Return:
+ * % 0 on success
+ * %-EINVAL if a parsed property value is not valid
+ */
+int v4l2_fwnode_device_parse(struct device *dev,
+ struct v4l2_fwnode_device_properties *props);
+
/**
* typedef parse_endpoint_func - Driver's callback function to be called on
* each V4L2 fwnode endpoint.
--
2.23.0
next prev parent reply other threads:[~2019-09-12 20:09 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-12 20:10 [PATCH v3 00/11] media: Report camera sensor properties Jacopo Mondi
2019-09-12 20:10 ` [PATCH v3 01/11] dt-bindings: video-interfaces: Document 'location' property Jacopo Mondi
2019-09-13 13:45 ` Hans Verkuil
2019-09-27 15:27 ` Pavel Machek
2019-09-28 12:48 ` Jacopo Mondi
2019-09-12 20:10 ` [PATCH v3 02/11] media: v4l2-ctrl: Document V4L2_CID_CAMERA_SENSOR_LOCATION Jacopo Mondi
2019-09-13 13:48 ` Hans Verkuil
2019-09-12 20:10 ` [PATCH v3 03/11] dt-bindings: video-interfaces: Expand rotation description Jacopo Mondi
2019-09-13 13:50 ` Hans Verkuil
2019-09-12 20:10 ` [PATCH v3 04/11] media: v4l2-ctrl: Document V4L2_CID_CAMERA_SENSOR_ROTATION Jacopo Mondi
2019-09-13 14:02 ` Hans Verkuil
2019-09-13 18:49 ` Jacopo Mondi
2019-09-24 15:53 ` Jacopo Mondi
2019-09-27 11:20 ` Hans Verkuil
2019-09-12 20:10 ` [PATCH v3 05/11] media: v4l2-ctrls: Add camera location and rotation Jacopo Mondi
2019-09-12 20:10 ` Jacopo Mondi [this message]
2019-09-13 14:08 ` [PATCH v3 06/11] media: v4l2-fwnode: Add helper to parse device properties Hans Verkuil
2019-09-13 19:04 ` Jacopo Mondi
2019-09-27 10:57 ` Hans Verkuil
2019-09-12 20:10 ` [PATCH v3 07/11] include: v4l2-ctrl: Sort forward declarations Jacopo Mondi
2019-09-12 20:10 ` [PATCH v3 08/11] media: v4l2-ctrls: Sort includes alphabetically Jacopo Mondi
2019-09-12 20:10 ` [PATCH v3 09/11] media: v4l2-ctrls: Add helper to register properties Jacopo Mondi
2019-09-13 14:25 ` Hans Verkuil
2019-09-12 20:10 ` [PATCH v3 10/11] media: i2c: ov5670: Parse and " Jacopo Mondi
2019-09-12 20:10 ` [PATCH v3 11/11] media: i2c: ov13858: " Jacopo Mondi
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