LXR linux/drivers/media/platform/vsp1/vsp1

   1/*
   2 * vsp1_histo.h  --  R-Car VSP1 Histogram API
   3 *
   4 * Copyright (C) 2016 Renesas Electronics Corporation
   5 * Copyright (C) 2016 Laurent Pinchart
   6 *
   7 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
   8 *
   9 * This program is free software; you can redistribute it and/or modify
  10 * it under the terms of the GNU General Public License as published by
  11 * the Free Software Foundation; either version 2 of the License, or
  12 * (at your option) any later version.
  13 */
  14#ifndef __VSP1_HISTO_H__
  15#define __VSP1_HISTO_H__
  16
  17#include <linux/list.h>
  18#include <linux/mutex.h>
  19#include <linux/spinlock.h>
  20
  21#include <media/media-entity.h>
  22#include <media/v4l2-dev.h>
  23#include <media/videobuf2-v4l2.h>
  24
  25#include "vsp1_entity.h"
  26
  27struct vsp1_device;
  28struct vsp1_pipeline;
  29
  30#define HISTO_PAD_SINK                          0
  31#define HISTO_PAD_SOURCE                        1
  32
  33struct vsp1_histogram_buffer {
  34        struct vb2_v4l2_buffer buf;
  35        struct list_head queue;
  36        void *addr;
  37};
  38
  39struct vsp1_histogram {
  40        struct vsp1_pipeline *pipe;
  41
  42        struct vsp1_entity entity;
  43        struct video_device video;
  44        struct media_pad pad;
  45
  46        const u32 *formats;
  47        unsigned int num_formats;
  48        size_t data_size;
  49        u32 meta_format;
  50
  51        struct mutex lock;
  52        struct vb2_queue queue;
  53
  54        spinlock_t irqlock;
  55        struct list_head irqqueue;
  56
  57        wait_queue_head_t wait_queue;
  58        bool readout;
  59};
  60
  61static inline struct vsp1_histogram *vdev_to_histo(struct video_device *vdev)
  62{
  63        return container_of(vdev, struct vsp1_histogram, video);
  64}
  65
  66static inline struct vsp1_histogram *subdev_to_histo(struct v4l2_subdev *subdev)
  67{
  68        return container_of(subdev, struct vsp1_histogram, entity.subdev);
  69}
  70
  71int vsp1_histogram_init(struct vsp1_device *vsp1, struct vsp1_histogram *histo,
  72                        enum vsp1_entity_type type, const char *name,
  73                        const struct vsp1_entity_operations *ops,
  74                        const unsigned int *formats, unsigned int num_formats,
  75                        size_t data_size, u32 meta_format);
  76void vsp1_histogram_destroy(struct vsp1_entity *entity);
  77
  78struct vsp1_histogram_buffer *
  79vsp1_histogram_buffer_get(struct vsp1_histogram *histo);
  80void vsp1_histogram_buffer_complete(struct vsp1_histogram *histo,
  81                                    struct vsp1_histogram_buffer *buf,
  82                                    size_t size);
  83
  84#endif /* __VSP1_HISTO_H__ */
  85