Commit e0a36063 authored by Jacopo Mondi's avatar Jacopo Mondi Committed by Mauro Carvalho Chehab
Browse files

media: v4l2-ctrls: Add helper to register properties 



Add an helper function to v4l2-ctrls to register controls associated
with a device property.

Signed-off-by: default avatarJacopo Mondi <jacopo@jmondi.org>
Signed-off-by: default avatarHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+huawei@kernel.org>
parent e0837a6c

drivers/media/v4l2-core/v4l2-ctrls.c

+40 −0
Original line number Diff line number Diff line
@@ -16,6 +16,7 @@ 
#include <media/v4l2-dev.h>

#include <media/v4l2-device.h>

#include <media/v4l2-event.h>

#include <media/v4l2-fwnode.h>

#include <media/v4l2-ioctl.h>



#define dprintk(vdev, fmt, arg...) do {					\
@@ -4621,3 +4622,42 @@ __poll_t v4l2_ctrl_poll(struct file *file, struct poll_table_struct *wait) 
	return 0;

}

EXPORT_SYMBOL(v4l2_ctrl_poll);



int v4l2_ctrl_new_fwnode_properties(struct v4l2_ctrl_handler *hdl,

				    const struct v4l2_ctrl_ops *ctrl_ops,

				    const struct v4l2_fwnode_device_properties *p)

{

	if (p->orientation != V4L2_FWNODE_PROPERTY_UNSET) {

		u32 orientation_ctrl;



		switch (p->orientation) {

		case V4L2_FWNODE_ORIENTATION_FRONT:

			orientation_ctrl = V4L2_CAMERA_ORIENTATION_FRONT;

			break;

		case V4L2_FWNODE_ORIENTATION_BACK:

			orientation_ctrl = V4L2_CAMERA_ORIENTATION_BACK;

			break;

		case V4L2_FWNODE_ORIENTATION_EXTERNAL:

			orientation_ctrl = V4L2_CAMERA_ORIENTATION_EXTERNAL;

			break;

		default:

			return -EINVAL;

		}

		if (!v4l2_ctrl_new_std_menu(hdl, ctrl_ops,

					    V4L2_CID_CAMERA_ORIENTATION,

					    V4L2_CAMERA_ORIENTATION_EXTERNAL, 0,

					    orientation_ctrl))

			return hdl->error;

	}



	if (p->rotation != V4L2_FWNODE_PROPERTY_UNSET) {

		if (!v4l2_ctrl_new_std(hdl, ctrl_ops,

				       V4L2_CID_CAMERA_SENSOR_ROTATION,

				       p->rotation, p->rotation, 1,

				       p->rotation))

			return hdl->error;

	}



	return hdl->error;

}

EXPORT_SYMBOL(v4l2_ctrl_new_fwnode_properties);

include/media/v4l2-ctrls.h

+26 −0
Original line number Diff line number Diff line
@@ -30,6 +30,7 @@ struct v4l2_ctrl; 
struct v4l2_ctrl_handler;

struct v4l2_ctrl_helper;

struct v4l2_fh;

struct v4l2_fwnode_device_properties;

struct v4l2_subdev;

struct v4l2_subscribed_event;

struct video_device;
@@ -1428,4 +1429,29 @@ int v4l2_ctrl_subdev_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh, 
 */

int v4l2_ctrl_subdev_log_status(struct v4l2_subdev *sd);



/**

 * v4l2_ctrl_new_fwnode_properties() - Register controls for the device

 *				       properties

 *

 * @hdl: pointer to &struct v4l2_ctrl_handler to register controls on

 * @ctrl_ops: pointer to &struct v4l2_ctrl_ops to register controls with

 * @p: pointer to &struct v4l2_fwnode_device_properties

 *

 * This function registers controls associated to device properties, using the

 * property values contained in @p parameter, if the property has been set to

 * a value.

 *

 * Currently the following v4l2 controls are parsed and registered:

 * - V4L2_CID_CAMERA_ORIENTATION

 * - V4L2_CID_CAMERA_SENSOR_ROTATION;

 *

 * Controls already registered by the caller with the @hdl control handler are

 * not overwritten. Callers should register the controls they want to handle

 * themselves before calling this function.

 *

 * Return: 0 on success, a negative error code on failure.

 */

int v4l2_ctrl_new_fwnode_properties(struct v4l2_ctrl_handler *hdl,

				    const struct v4l2_ctrl_ops *ctrl_ops,

				    const struct v4l2_fwnode_device_properties *p);

#endif