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/*
* OMAP3 ISP library - V4L2 sub-devices
*
* Copyright (C) 2010-2011 Ideas on board SPRL
*
* Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at
* your option) any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef __SUBDEV_H__
#define __SUBDEV_H__
#include <linux/v4l2-subdev.h>
struct media_entity;
/*
* v4l2_subdev_open - Open a sub-device
* @entity: Sub-device media entity
*
* Open the V4L2 subdev device node associated with @entity. The file descriptor
* is stored in the media_entity structure.
*
* Return 0 on success, or a negative error code on failure.
*/
int v4l2_subdev_open(struct media_entity *entity);
/*
* v4l2_subdev_close - Close a sub-device
* @entity: Sub-device media entity
*
* Close the V4L2 subdev device node associated with the @entity and opened by
* a previous call to v4l2_subdev_open() (either explicit or implicit).
*/
void v4l2_subdev_close(struct media_entity *entity);
/*
* v4l2_subdev_get_format - Retrieve the format on a pad
* @entity: Subdev-device media entity
* @format: Format to be filled
* @pad: Pad number
* @which: Identifier of the format to get
*
* Retrieve the current format on the @entity @pad and store it in the @format
* structure.
*
* @which is set to V4L2_SUBDEV_FORMAT_TRY to retrieve the try format stored in
* the file handle, of V4L2_SUBDEV_FORMAT_ACTIVE to retrieve the current active
* format.
*
* Return 0 on success, or a negative error code on failure.
*/
int v4l2_subdev_get_format(struct media_entity *entity,
struct v4l2_mbus_framefmt *format, unsigned int pad,
enum v4l2_subdev_format_whence which);
/*
* v4l2_subdev_set_format - Set the format on a pad
* @entity: Subdev-device media entity
* @format: Format
* @pad: Pad number
* @which: Identifier of the format to set
*
* Set the format on the @entity @pad to @format. The driver is allowed to
* modify the requested format, in which case @format is updated with the
* modifications.
*
* @which is set to V4L2_SUBDEV_FORMAT_TRY to set the try format stored in the
* file handle, of V4L2_SUBDEV_FORMAT_ACTIVE to configure the device with an
* active format.
*
* Return 0 on success, or a negative error code on failure.
*/
int v4l2_subdev_set_format(struct media_entity *entity,
struct v4l2_mbus_framefmt *format, unsigned int pad,
enum v4l2_subdev_format_whence which);
/*
* v4l2_subdev_get_crop - Retrieve the crop rectangle on a pad
* @entity: Subdev-device media entity
* @rect: Crop rectangle to be filled
* @pad: Pad number
* @which: Identifier of the format to get
*
* Retrieve the current crop rectangleon the @entity @pad and store it in the
* @rect structure.
*
* @which is set to V4L2_SUBDEV_FORMAT_TRY to retrieve the try crop rectangle
* stored in the file handle, of V4L2_SUBDEV_FORMAT_ACTIVE to retrieve the
* current active crop rectangle.
*
* Return 0 on success, or a negative error code on failure.
*/
int v4l2_subdev_get_crop(struct media_entity *entity, struct v4l2_rect *rect,
unsigned int pad, enum v4l2_subdev_format_whence which);
/*
* v4l2_subdev_set_crop - Set the crop rectangle on a pad
* @entity: Subdev-device media entity
* @crop: Crop rectangle
* @pad: Pad number
* @which: Identifier of the format to set
*
* Set the crop rectangle on the @entity @pad to @rect. The driver is allowed to
* modify the requested rectangle, in which case @rect is updated with the
* modifications.
*
* @which is set to V4L2_SUBDEV_FORMAT_TRY to set the try crop rectangle stored
* in the file handle, of V4L2_SUBDEV_FORMAT_ACTIVE to configure the device with
* an active crop rectangle.
*
* Return 0 on success, or a negative error code on failure.
*/
int v4l2_subdev_set_crop(struct media_entity *entity, struct v4l2_rect *rect,
unsigned int pad, enum v4l2_subdev_format_whence which);
/*
* v4l2_subdev_set_frame_interval - Set the frame interval on a sub-device
* @entity: Subdev-device media entity
* @interval: Frame interval
*
* Set the frame interval on subdev @entity to @interval. The driver is allowed
* to modify the requested frame interval, in which case @interval is updated
* with the modifications.
*
* Frame interval setting is usually supported only on devices at the beginning
* of video pipelines, such as sensors.
*
* Return 0 on success, or a negative error code on failure.
*/
int v4l2_subdev_set_frame_interval(struct media_entity *entity,
struct v4l2_fract *interval);
/*
* v4l2_subdev_get_control - Read the value of a control
* @entity: Subdev-device media entity
* @id: Control ID
* @value: Control value to be filled
*
* Retrieve the current value of control @id and store it in @value.
*
* Return 0 on success or a negative error code on failure.
*/
int v4l2_subdev_get_control(struct media_entity *entity, unsigned int id,
int32_t *value);
/*
* v4l2_subdev_set_control - Write the value of a control
* @entity: Subdev-device media entity
* @id: Control ID
* @value: Control value
*
* Set control @id to @value. The device is allowed to modify the requested
* value, in which case @value is updated to the modified value.
*
* Return 0 on success or a negative error code on failure.
*/
int v4l2_subdev_set_control(struct media_entity *entity, unsigned int id,
int32_t *value);
/*
* v4l2_subdev_get_controls - Read the value of multiple controls
* @entity: Subdev-device media entity
* @count: Number of controls
* @ctrls: Controls to be read
*
* Retrieve the current value of controls identified by @ctrls.
*
* Return 0 on success or a negative error code on failure.
*/
int v4l2_subdev_get_controls(struct media_entity *entity, unsigned int count,
struct v4l2_ext_control *ctrls);
/*
* v4l2_subdev_set_controls - Write the value of multiple controls
* @entity: Subdev-device media entity
* @count: Number of controls
* @ctrls: Controls to be written
*
* Set controls identified by @ctrls. The device is allowed to modify the
* requested values, in which case @ctrls is updated to the modified value.
*
* Return 0 on success or a negative error code on failure.
*/
int v4l2_subdev_set_controls(struct media_entity *entity, unsigned int count,
struct v4l2_ext_control *ctrls);
#endif
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