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media: v4l2-ctrls: Add helper to register properties

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

Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Jacopo Mondi 2020-05-09 11:04:52 +02:00 committed by Mauro Carvalho Chehab
parent e0837a6c08
commit e0a360630d
2 changed files with 66 additions and 0 deletions
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40
drivers/media/v4l2-core/v4l2-ctrls.c
View File

@ -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);

26
include/media/v4l2-ctrls.h
View File

@ -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