drivers/media/platform/vsp1/vsp1_pipe.h

   1 /*
   2  * vsp1_pipe.h  --  R-Car VSP1 Pipeline
   3  *
   4  * Copyright (C) 2013-2015 Renesas Electronics Corporation
   5  *
   6  * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  */
  13 #ifndef __VSP1_PIPE_H__
  14 #define __VSP1_PIPE_H__
  15
  16 #include <linux/list.h>
  17 #include <linux/spinlock.h>
  18 #include <linux/wait.h>
  19
  20 #include <media/media-entity.h>
  21
  22 struct vsp1_dl;
  23 struct vsp1_rwpf;
  24
  25 /*
  26  * struct vsp1_format_info - VSP1 video format description
  27  * @mbus: media bus format code
  28  * @fourcc: V4L2 pixel format FCC identifier
  29  * @planes: number of planes
  30  * @bpp: bits per pixel
  31  * @hwfmt: VSP1 hardware format
  32  * @swap_yc: the Y and C components are swapped (Y comes before C)
  33  * @swap_uv: the U and V components are swapped (V comes before U)
  34  * @hsub: horizontal subsampling factor
  35  * @vsub: vertical subsampling factor
  36  * @alpha: has an alpha channel
  37  */
  38 struct vsp1_format_info {
  39         u32 fourcc;
  40         unsigned int mbus;
  41         unsigned int hwfmt;
  42         unsigned int swap;
  43         unsigned int planes;
  44         unsigned int bpp[3];
  45         bool swap_yc;
  46         bool swap_uv;
  47         unsigned int hsub;
  48         unsigned int vsub;
  49         bool alpha;
  50 };
  51
  52 enum vsp1_pipeline_state {
  53         VSP1_PIPELINE_STOPPED,
  54         VSP1_PIPELINE_RUNNING,
  55         VSP1_PIPELINE_STOPPING,
  56 };
  57
  58 /*
  59  * struct vsp1_pipeline - A VSP1 hardware pipeline
  60  * @pipe: the media pipeline
  61  * @irqlock: protects the pipeline state
  62  * @state: current state
  63  * @wq: work queue to wait for state change completion
  64  * @frame_end: frame end interrupt handler
  65  * @lock: protects the pipeline use count and stream count
  66  * @use_count: number of video nodes using the pipeline
  67  * @stream_count: number of streaming video nodes
  68  * @buffers_ready: bitmask of RPFs and WPFs with at least one buffer available
  69  * @num_inputs: number of RPFs
  70  * @inputs: array of RPFs in the pipeline (indexed by RPF index)
  71  * @output: WPF at the output of the pipeline
  72  * @bru: BRU entity, if present
  73  * @lif: LIF entity, if present
  74  * @uds: UDS entity, if present
  75  * @uds_input: entity at the input of the UDS, if the UDS is present
  76  * @entities: list of entities in the pipeline
  77  * @dl: display list associated with the pipeline
  78  */
  79 struct vsp1_pipeline {
  80         struct media_pipeline pipe;
  81
  82         spinlock_t irqlock;
  83         enum vsp1_pipeline_state state;
  84         wait_queue_head_t wq;
  85
  86         void (*frame_end)(struct vsp1_pipeline *pipe);
  87
  88         struct mutex lock;
  89         unsigned int use_count;
  90         unsigned int stream_count;
  91         unsigned int buffers_ready;
  92
  93         unsigned int num_inputs;
  94         struct vsp1_rwpf *inputs[VSP1_MAX_RPF];
  95         struct vsp1_rwpf *output;
  96         struct vsp1_entity *bru;
  97         struct vsp1_entity *lif;
  98         struct vsp1_entity *uds;
  99         struct vsp1_entity *uds_input;
 100
 101         struct list_head entities;
 102
 103         struct vsp1_dl *dl;
 104 };
 105
 106 static inline struct vsp1_pipeline *to_vsp1_pipeline(struct media_entity *e)
 107 {
 108         if (likely(e->pipe))
 109                 return container_of(e->pipe, struct vsp1_pipeline, pipe);
 110         else
 111                 return NULL;
 112 }
 113
 114 void vsp1_pipeline_reset(struct vsp1_pipeline *pipe);
 115 void vsp1_pipeline_init(struct vsp1_pipeline *pipe);
 116
 117 void vsp1_pipeline_run(struct vsp1_pipeline *pipe);
 118 bool vsp1_pipeline_stopped(struct vsp1_pipeline *pipe);
 119 int vsp1_pipeline_stop(struct vsp1_pipeline *pipe);
 120 bool vsp1_pipeline_ready(struct vsp1_pipeline *pipe);
 121
 122 void vsp1_pipeline_display_start(struct vsp1_pipeline *pipe);
 123 void vsp1_pipeline_frame_end(struct vsp1_pipeline *pipe);
 124
 125 void vsp1_pipeline_propagate_alpha(struct vsp1_pipeline *pipe,
 126                                    struct vsp1_entity *input,
 127                                    unsigned int alpha);
 128
 129 void vsp1_pipelines_suspend(struct vsp1_device *vsp1);
 130 void vsp1_pipelines_resume(struct vsp1_device *vsp1);
 131
 132 const struct vsp1_format_info *vsp1_get_format_info(u32 fourcc);
 133
 134 #endif /* __VSP1_PIPE_H__ */