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Commit 69c536b2 authored by Sergio Aguirre's avatar Sergio Aguirre Committed by Mauro Carvalho Chehab
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[media] v4l: omap4iss: Add support for OMAP4 camera interface - Resizer 



This adds a very simplistic driver to utilize the CSI2A interface inside
the ISS subsystem in OMAP4, and dump the data to memory.
Check Documentation/video4linux/omap4_camera.txt for details.
This commit adds resizer support.
[Port the driver to v3.12-rc3, including the following changes
- Don't include plat/ headers
- Don't use cpu_is_omap44xx() macro
- Don't depend on EXPERIMENTAL
- Fix s_crop operation prototype
- Update link_notify prototype
- Rename media_entity_remote_source to media_entity_remote_pad]

Signed-off-by: default avatarSergio Aguirre <sergio.a.aguirre@gmail.com>
Signed-off-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: default avatarHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 71414826

drivers/staging/media/omap4iss/iss_resizer.c

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drivers/staging/media/omap4iss/iss_resizer.h

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Original line number Diff line number Diff line 
/*

 * 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		(1 << 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);

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 */