208 lines
7.0 KiB
C
208 lines
7.0 KiB
C
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/*
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* Copyright (C) 2012-2016 Mentor Graphics Inc.
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*
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* i.MX Queued image conversion support, with tiling and rotation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#ifndef __IMX_IPU_IMAGE_CONVERT_H__
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#define __IMX_IPU_IMAGE_CONVERT_H__
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#include <video/imx-ipu-v3.h>
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struct ipu_image_convert_ctx;
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/**
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* struct ipu_image_convert_run - image conversion run request struct
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*
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* @ctx: the conversion context
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* @in_phys: dma addr of input image buffer for this run
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* @out_phys: dma addr of output image buffer for this run
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* @status: completion status of this run
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*/
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struct ipu_image_convert_run {
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struct ipu_image_convert_ctx *ctx;
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dma_addr_t in_phys;
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dma_addr_t out_phys;
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int status;
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/* internal to image converter, callers don't touch */
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struct list_head list;
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};
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/**
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* ipu_image_convert_cb_t - conversion callback function prototype
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*
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* @run: the completed conversion run pointer
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* @ctx: a private context pointer for the callback
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*/
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typedef void (*ipu_image_convert_cb_t)(struct ipu_image_convert_run *run,
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void *ctx);
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/**
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* ipu_image_convert_enum_format() - enumerate the image converter's
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* supported input and output pixel formats.
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*
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* @index: pixel format index
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* @fourcc: v4l2 fourcc for this index
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*
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* Returns 0 with a valid index and fills in v4l2 fourcc, -EINVAL otherwise.
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*
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* In V4L2, drivers can call ipu_image_enum_format() in .enum_fmt.
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*/
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int ipu_image_convert_enum_format(int index, u32 *fourcc);
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/**
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* ipu_image_convert_adjust() - adjust input/output images to IPU restrictions.
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*
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* @in: input image format, adjusted on return
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* @out: output image format, adjusted on return
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* @rot_mode: rotation mode
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*
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* In V4L2, drivers can call ipu_image_convert_adjust() in .try_fmt.
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*/
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void ipu_image_convert_adjust(struct ipu_image *in, struct ipu_image *out,
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enum ipu_rotate_mode rot_mode);
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/**
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* ipu_image_convert_verify() - verify that input/output image formats
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* and rotation mode meet IPU restrictions.
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*
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* @in: input image format
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* @out: output image format
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* @rot_mode: rotation mode
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*
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* Returns 0 if the formats and rotation mode meet IPU restrictions,
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* -EINVAL otherwise.
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*/
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int ipu_image_convert_verify(struct ipu_image *in, struct ipu_image *out,
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enum ipu_rotate_mode rot_mode);
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/**
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* ipu_image_convert_prepare() - prepare a conversion context.
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*
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* @ipu: the IPU handle to use for the conversions
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* @ic_task: the IC task to use for the conversions
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* @in: input image format
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* @out: output image format
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* @rot_mode: rotation mode
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* @complete: run completion callback
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* @complete_context: a context pointer for the completion callback
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*
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* Returns an opaque conversion context pointer on success, error pointer
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* on failure. The input/output formats and rotation mode must already meet
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* IPU retrictions.
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*
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* In V4L2, drivers should call ipu_image_convert_prepare() at streamon.
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*/
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struct ipu_image_convert_ctx *
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ipu_image_convert_prepare(struct ipu_soc *ipu, enum ipu_ic_task ic_task,
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struct ipu_image *in, struct ipu_image *out,
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enum ipu_rotate_mode rot_mode,
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ipu_image_convert_cb_t complete,
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void *complete_context);
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/**
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* ipu_image_convert_unprepare() - unprepare a conversion context.
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*
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* @ctx: the conversion context pointer to unprepare
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*
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* Aborts any active or pending conversions for this context and
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* frees the context. Any currently active or pending runs belonging
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* to this context are returned via the completion callback with an
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* error run status.
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*
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* In V4L2, drivers should call ipu_image_convert_unprepare() at
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* streamoff.
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*/
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void ipu_image_convert_unprepare(struct ipu_image_convert_ctx *ctx);
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/**
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* ipu_image_convert_queue() - queue a conversion run
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*
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* @run: the run request pointer
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*
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* ipu_image_convert_run must be dynamically allocated (_not_ as a local
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* var) by callers and filled in with a previously prepared conversion
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* context handle and the dma addr's of the input and output image buffers
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* for this conversion run.
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*
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* When this conversion completes, the run pointer is returned via the
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* completion callback. The caller is responsible for freeing the run
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* object after it completes.
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*
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* In V4L2, drivers should call ipu_image_convert_queue() while
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* streaming to queue the conversion of a received input buffer.
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* For example mem2mem devices this would be called in .device_run.
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*/
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int ipu_image_convert_queue(struct ipu_image_convert_run *run);
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/**
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* ipu_image_convert_abort() - abort conversions
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*
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* @ctx: the conversion context pointer
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*
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* This will abort any active or pending conversions for this context.
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* Any currently active or pending runs belonging to this context are
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* returned via the completion callback with an error run status.
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*/
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void ipu_image_convert_abort(struct ipu_image_convert_ctx *ctx);
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/**
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* ipu_image_convert() - asynchronous image conversion request
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*
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* @ipu: the IPU handle to use for the conversion
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* @ic_task: the IC task to use for the conversion
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* @in: input image format
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* @out: output image format
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* @rot_mode: rotation mode
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* @complete: run completion callback
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* @complete_context: a context pointer for the completion callback
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*
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* Request a single image conversion. Returns the run that has been queued.
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* A conversion context is automatically created and is available in run->ctx.
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* As with ipu_image_convert_prepare(), the input/output formats and rotation
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* mode must already meet IPU retrictions.
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*
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* On successful return the caller can queue more run requests if needed, using
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* the prepared context in run->ctx. The caller is responsible for unpreparing
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* the context when no more conversion requests are needed.
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*/
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struct ipu_image_convert_run *
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ipu_image_convert(struct ipu_soc *ipu, enum ipu_ic_task ic_task,
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struct ipu_image *in, struct ipu_image *out,
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enum ipu_rotate_mode rot_mode,
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ipu_image_convert_cb_t complete,
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void *complete_context);
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/**
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* ipu_image_convert_sync() - synchronous single image conversion request
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*
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* @ipu: the IPU handle to use for the conversion
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* @ic_task: the IC task to use for the conversion
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* @in: input image format
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* @out: output image format
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* @rot_mode: rotation mode
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*
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* Carry out a single image conversion. Returns when the conversion
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* completes. The input/output formats and rotation mode must already
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* meet IPU retrictions. The created context is automatically unprepared
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* and the run freed on return.
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*/
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int ipu_image_convert_sync(struct ipu_soc *ipu, enum ipu_ic_task ic_task,
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struct ipu_image *in, struct ipu_image *out,
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enum ipu_rotate_mode rot_mode);
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#endif /* __IMX_IPU_IMAGE_CONVERT_H__ */
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