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/*
* Copyright (C) 2012-2016 Mentor Graphics Inc.
*
* i.MX Queued image conversion support, with tiling and rotation.
*
* 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.
*
* This program 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.
*/
#ifndef __IMX_IPU_IMAGE_CONVERT_H__
#define __IMX_IPU_IMAGE_CONVERT_H__
#include <video/imx-ipu-v3.h>
struct ipu_image_convert_ctx;
/**
* struct ipu_image_convert_run - image conversion run request struct
*
* @ctx: the conversion context
* @in_phys: dma addr of input image buffer for this run
* @out_phys: dma addr of output image buffer for this run
* @status: completion status of this run
*/
struct ipu_image_convert_run {
struct ipu_image_convert_ctx *ctx;
dma_addr_t in_phys;
dma_addr_t out_phys;
int status;
/* internal to image converter, callers don't touch */
struct list_head list;
};
/**
* ipu_image_convert_cb_t - conversion callback function prototype
*
* @run: the completed conversion run pointer
* @ctx: a private context pointer for the callback
*/
typedef void (*ipu_image_convert_cb_t)(struct ipu_image_convert_run *run,
void *ctx);
/**
* ipu_image_convert_enum_format() - enumerate the image converter's
* supported input and output pixel formats.
*
* @index: pixel format index
* @fourcc: v4l2 fourcc for this index
*
* Returns 0 with a valid index and fills in v4l2 fourcc, -EINVAL otherwise.
*
* In V4L2, drivers can call ipu_image_enum_format() in .enum_fmt.
*/
int ipu_image_convert_enum_format(int index, u32 *fourcc);
/**
* ipu_image_convert_adjust() - adjust input/output images to IPU restrictions.
*
* @in: input image format, adjusted on return
* @out: output image format, adjusted on return
* @rot_mode: rotation mode
*
* In V4L2, drivers can call ipu_image_convert_adjust() in .try_fmt.
*/
void ipu_image_convert_adjust(struct ipu_image *in, struct ipu_image *out,
enum ipu_rotate_mode rot_mode);
/**
* ipu_image_convert_verify() - verify that input/output image formats
* and rotation mode meet IPU restrictions.
*
* @in: input image format
* @out: output image format
* @rot_mode: rotation mode
*
* Returns 0 if the formats and rotation mode meet IPU restrictions,
* -EINVAL otherwise.
*/
int ipu_image_convert_verify(struct ipu_image *in, struct ipu_image *out,
enum ipu_rotate_mode rot_mode);
/**
* ipu_image_convert_prepare() - prepare a conversion context.
*
* @ipu: the IPU handle to use for the conversions
* @ic_task: the IC task to use for the conversions
* @in: input image format
* @out: output image format
* @rot_mode: rotation mode
* @complete: run completion callback
* @complete_context: a context pointer for the completion callback
*
* Returns an opaque conversion context pointer on success, error pointer
* on failure. The input/output formats and rotation mode must already meet
* IPU retrictions.
*
* In V4L2, drivers should call ipu_image_convert_prepare() at streamon.
*/
struct ipu_image_convert_ctx *
ipu_image_convert_prepare(struct ipu_soc *ipu, enum ipu_ic_task ic_task,
struct ipu_image *in, struct ipu_image *out,
enum ipu_rotate_mode rot_mode,
ipu_image_convert_cb_t complete,
void *complete_context);
/**
* ipu_image_convert_unprepare() - unprepare a conversion context.
*
* @ctx: the conversion context pointer to unprepare
*
* Aborts any active or pending conversions for this context and
* frees the context. Any currently active or pending runs belonging
* to this context are returned via the completion callback with an
* error run status.
*
* In V4L2, drivers should call ipu_image_convert_unprepare() at
* streamoff.
*/
void ipu_image_convert_unprepare(struct ipu_image_convert_ctx *ctx);
/**
* ipu_image_convert_queue() - queue a conversion run
*
* @run: the run request pointer
*
* ipu_image_convert_run must be dynamically allocated (_not_ as a local
* var) by callers and filled in with a previously prepared conversion
* context handle and the dma addr's of the input and output image buffers
* for this conversion run.
*
* When this conversion completes, the run pointer is returned via the
* completion callback. The caller is responsible for freeing the run
* object after it completes.
*
* In V4L2, drivers should call ipu_image_convert_queue() while
* streaming to queue the conversion of a received input buffer.
* For example mem2mem devices this would be called in .device_run.
*/
int ipu_image_convert_queue(struct ipu_image_convert_run *run);
/**
* ipu_image_convert_abort() - abort conversions
*
* @ctx: the conversion context pointer
*
* This will abort any active or pending conversions for this context.
* Any currently active or pending runs belonging to this context are
* returned via the completion callback with an error run status.
*/
void ipu_image_convert_abort(struct ipu_image_convert_ctx *ctx);
/**
* ipu_image_convert() - asynchronous image conversion request
*
* @ipu: the IPU handle to use for the conversion
* @ic_task: the IC task to use for the conversion
* @in: input image format
* @out: output image format
* @rot_mode: rotation mode
* @complete: run completion callback
* @complete_context: a context pointer for the completion callback
*
* Request a single image conversion. Returns the run that has been queued.
* A conversion context is automatically created and is available in run->ctx.
* As with ipu_image_convert_prepare(), the input/output formats and rotation
* mode must already meet IPU retrictions.
*
* On successful return the caller can queue more run requests if needed, using
* the prepared context in run->ctx. The caller is responsible for unpreparing
* the context when no more conversion requests are needed.
*/
struct ipu_image_convert_run *
ipu_image_convert(struct ipu_soc *ipu, enum ipu_ic_task ic_task,
struct ipu_image *in, struct ipu_image *out,
enum ipu_rotate_mode rot_mode,
ipu_image_convert_cb_t complete,
void *complete_context);
/**
* ipu_image_convert_sync() - synchronous single image conversion request
*
* @ipu: the IPU handle to use for the conversion
* @ic_task: the IC task to use for the conversion
* @in: input image format
* @out: output image format
* @rot_mode: rotation mode
*
* Carry out a single image conversion. Returns when the conversion
* completes. The input/output formats and rotation mode must already
* meet IPU retrictions. The created context is automatically unprepared
* and the run freed on return.
*/
int ipu_image_convert_sync(struct ipu_soc *ipu, enum ipu_ic_task ic_task,
struct ipu_image *in, struct ipu_image *out,
enum ipu_rotate_mode rot_mode);
#endif /* __IMX_IPU_IMAGE_CONVERT_H__ */
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