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linux-headers-5.4.0-212
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imx-ipu-image-convert.h
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/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * Copyright (C) 2012-2016 Mentor Graphics Inc. * * i.MX Queued image conversion support, with tiling and rotation. */ #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__ */