drivers/staging/media/omap4iss/iss_resizer.h

/*
 * TI OMAP4 ISS V4L2 Driver - ISP RESIZER module
 *
 * Copyright (C) 2012 Texas Instruments, Inc.
 *
 * Author: Sergio Aguirre <sergio.a.aguirre@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#ifndef OMAP4_ISS_RESIZER_H
#define OMAP4_ISS_RESIZER_H

#include "iss_video.h"

enum resizer_input_entity {
	RESIZER_INPUT_NONE,
	RESIZER_INPUT_IPIPE,
	RESIZER_INPUT_IPIPEIF
};

#define RESIZER_OUTPUT_MEMORY			BIT(0)

/* Sink and source RESIZER pads */
#define RESIZER_PAD_SINK			0
#define RESIZER_PAD_SOURCE_MEM			1
#define RESIZER_PADS_NUM			2

/*
 * struct iss_resizer_device - Structure for the RESIZER module to store its own
 *			    information
 * @subdev: V4L2 subdevice
 * @pads: Sink and source media entity pads
 * @formats: Active video formats
 * @input: Active input
 * @output: Active outputs
 * @video_out: Output video node
 * @error: A hardware error occurred during capture
 * @state: Streaming state
 * @wait: Wait queue used to stop the module
 * @stopping: Stopping state
 */
struct iss_resizer_device {
	struct v4l2_subdev subdev;
	struct media_pad pads[RESIZER_PADS_NUM];
	struct v4l2_mbus_framefmt formats[RESIZER_PADS_NUM];

	enum resizer_input_entity input;
	unsigned int output;
	struct iss_video video_out;
	unsigned int error;

	enum iss_pipeline_stream_state state;
	wait_queue_head_t wait;
	atomic_t stopping;
};

struct iss_device;

int omap4iss_resizer_init(struct iss_device *iss);
int omap4iss_resizer_create_links(struct iss_device *iss);
void omap4iss_resizer_cleanup(struct iss_device *iss);
int omap4iss_resizer_register_entities(struct iss_resizer_device *resizer,
				       struct v4l2_device *vdev);
void omap4iss_resizer_unregister_entities(struct iss_resizer_device *resizer);

int omap4iss_resizer_busy(struct iss_resizer_device *resizer);
void omap4iss_resizer_isr(struct iss_resizer_device *resizer, u32 events);
void omap4iss_resizer_restore_context(struct iss_device *iss);
void omap4iss_resizer_max_rate(struct iss_resizer_device *resizer,
			       unsigned int *max_rate);

#endif	/* OMAP4_ISS_RESIZER_H */