| Laurent Pinchart | df33051 | 2013-05-15 11:36:19 -0300 | [diff] [blame] | 1 | /* |
| 2 | * Xilinx Video DMA |
| 3 | * |
| 4 | * Copyright (C) 2013-2015 Ideas on Board |
| 5 | * Copyright (C) 2013-2015 Xilinx, Inc. |
| 6 | * |
| 7 | * Contacts: Hyun Kwon <hyun.kwon@xilinx.com> |
| 8 | * Laurent Pinchart <laurent.pinchart@ideasonboard.com> |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License version 2 as |
| 12 | * published by the Free Software Foundation. |
| 13 | */ |
| 14 | |
| 15 | #ifndef __XILINX_VIP_DMA_H__ |
| 16 | #define __XILINX_VIP_DMA_H__ |
| 17 | |
| 18 | #include <linux/dmaengine.h> |
| 19 | #include <linux/mutex.h> |
| 20 | #include <linux/spinlock.h> |
| 21 | #include <linux/videodev2.h> |
| 22 | |
| 23 | #include <media/media-entity.h> |
| 24 | #include <media/v4l2-dev.h> |
| Junghak Sung | c139990 | 2015-09-22 10:30:29 -0300 | [diff] [blame] | 25 | #include <media/videobuf2-v4l2.h> |
| Laurent Pinchart | df33051 | 2013-05-15 11:36:19 -0300 | [diff] [blame] | 26 | |
| 27 | struct dma_chan; |
| 28 | struct xvip_composite_device; |
| 29 | struct xvip_video_format; |
| 30 | |
| 31 | /** |
| 32 | * struct xvip_pipeline - Xilinx Video IP pipeline structure |
| 33 | * @pipe: media pipeline |
| 34 | * @lock: protects the pipeline @stream_count |
| 35 | * @use_count: number of DMA engines using the pipeline |
| 36 | * @stream_count: number of DMA engines currently streaming |
| 37 | * @num_dmas: number of DMA engines in the pipeline |
| 38 | * @output: DMA engine at the output of the pipeline |
| 39 | */ |
| 40 | struct xvip_pipeline { |
| 41 | struct media_pipeline pipe; |
| 42 | |
| 43 | struct mutex lock; |
| 44 | unsigned int use_count; |
| 45 | unsigned int stream_count; |
| 46 | |
| 47 | unsigned int num_dmas; |
| 48 | struct xvip_dma *output; |
| 49 | }; |
| 50 | |
| 51 | static inline struct xvip_pipeline *to_xvip_pipeline(struct media_entity *e) |
| 52 | { |
| 53 | return container_of(e->pipe, struct xvip_pipeline, pipe); |
| 54 | } |
| 55 | |
| 56 | /** |
| 57 | * struct xvip_dma - Video DMA channel |
| 58 | * @list: list entry in a composite device dmas list |
| 59 | * @video: V4L2 video device associated with the DMA channel |
| 60 | * @pad: media pad for the video device entity |
| 61 | * @xdev: composite device the DMA channel belongs to |
| 62 | * @pipe: pipeline belonging to the DMA channel |
| 63 | * @port: composite device DT node port number for the DMA channel |
| 64 | * @lock: protects the @format, @fmtinfo and @queue fields |
| 65 | * @format: active V4L2 pixel format |
| 66 | * @fmtinfo: format information corresponding to the active @format |
| 67 | * @queue: vb2 buffers queue |
| Laurent Pinchart | df33051 | 2013-05-15 11:36:19 -0300 | [diff] [blame] | 68 | * @sequence: V4L2 buffers sequence number |
| 69 | * @queued_bufs: list of queued buffers |
| 70 | * @queued_lock: protects the buf_queued list |
| 71 | * @dma: DMA engine channel |
| 72 | * @align: transfer alignment required by the DMA channel (in bytes) |
| 73 | * @xt: dma interleaved template for dma configuration |
| 74 | * @sgl: data chunk structure for dma_interleaved_template |
| 75 | */ |
| 76 | struct xvip_dma { |
| 77 | struct list_head list; |
| 78 | struct video_device video; |
| 79 | struct media_pad pad; |
| 80 | |
| 81 | struct xvip_composite_device *xdev; |
| 82 | struct xvip_pipeline pipe; |
| 83 | unsigned int port; |
| 84 | |
| 85 | struct mutex lock; |
| 86 | struct v4l2_pix_format format; |
| 87 | const struct xvip_video_format *fmtinfo; |
| 88 | |
| 89 | struct vb2_queue queue; |
| Laurent Pinchart | df33051 | 2013-05-15 11:36:19 -0300 | [diff] [blame] | 90 | unsigned int sequence; |
| 91 | |
| 92 | struct list_head queued_bufs; |
| 93 | spinlock_t queued_lock; |
| 94 | |
| 95 | struct dma_chan *dma; |
| 96 | unsigned int align; |
| 97 | struct dma_interleaved_template xt; |
| 98 | struct data_chunk sgl[1]; |
| 99 | }; |
| 100 | |
| 101 | #define to_xvip_dma(vdev) container_of(vdev, struct xvip_dma, video) |
| 102 | |
| 103 | int xvip_dma_init(struct xvip_composite_device *xdev, struct xvip_dma *dma, |
| 104 | enum v4l2_buf_type type, unsigned int port); |
| 105 | void xvip_dma_cleanup(struct xvip_dma *dma); |
| 106 | |
| 107 | #endif /* __XILINX_VIP_DMA_H__ */ |