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Diffstat (limited to 'include/video')
| -rw-r--r-- | include/video/imx-ipu-image-convert.h | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/include/video/imx-ipu-image-convert.h b/include/video/imx-ipu-image-convert.h new file mode 100644 index 000000000000..7b87efc6d77a --- /dev/null +++ b/include/video/imx-ipu-image-convert.h @@ -0,0 +1,207 @@ +/* + * 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__ */ |