/* SPDX-License-Identifier: GPL-2.0 */ /* * Xilinx Video DMA * * Copyright (C) 2013-2015 Ideas on Board * Copyright (C) 2013-2015 Xilinx, Inc. * * Contacts: Hyun Kwon <[email protected]> * Laurent Pinchart <[email protected]> */ #ifndef __XILINX_VIP_DMA_H__ #define __XILINX_VIP_DMA_H__ #include <linux/dmaengine.h> #include <linux/mutex.h> #include <linux/spinlock.h> #include <linux/videodev2.h> #include <media/media-entity.h> #include <media/v4l2-dev.h> #include <media/videobuf2-v4l2.h> struct dma_chan; struct xvip_composite_device; struct xvip_video_format; /** * struct xvip_pipeline - Xilinx Video IP pipeline structure * @pipe: media pipeline * @lock: protects the pipeline @stream_count * @use_count: number of DMA engines using the pipeline * @stream_count: number of DMA engines currently streaming * @num_dmas: number of DMA engines in the pipeline * @output: DMA engine at the output of the pipeline */ struct xvip_pipeline { … }; static inline struct xvip_pipeline *to_xvip_pipeline(struct video_device *vdev) { … } /** * struct xvip_dma - Video DMA channel * @list: list entry in a composite device dmas list * @video: V4L2 video device associated with the DMA channel * @pad: media pad for the video device entity * @xdev: composite device the DMA channel belongs to * @pipe: pipeline belonging to the DMA channel * @port: composite device DT node port number for the DMA channel * @lock: protects the @format, @fmtinfo and @queue fields * @format: active V4L2 pixel format * @fmtinfo: format information corresponding to the active @format * @queue: vb2 buffers queue * @sequence: V4L2 buffers sequence number * @queued_bufs: list of queued buffers * @queued_lock: protects the buf_queued list * @dma: DMA engine channel * @align: transfer alignment required by the DMA channel (in bytes) * @xt: dma interleaved template for dma configuration * @sgl: data chunk structure for dma_interleaved_template */ struct xvip_dma { … }; #define to_xvip_dma(vdev) … int xvip_dma_init(struct xvip_composite_device *xdev, struct xvip_dma *dma, enum v4l2_buf_type type, unsigned int port); void xvip_dma_cleanup(struct xvip_dma *dma); #endif /* __XILINX_VIP_DMA_H__ */
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