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

   1/* SPDX-License-Identifier: GPL-2.0+ */
   2/*
   3 * vsp1_histo.h  --  R-Car VSP1 Histogram API
   4 *
   5 * Copyright (C) 2016 Renesas Electronics Corporation
   6 * Copyright (C) 2016 Laurent Pinchart
   7 *
   8 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
   9 */
  10#ifndef __VSP1_HISTO_H__
  11#define __VSP1_HISTO_H__
  12
  13#include <linux/list.h>
  14#include <linux/mutex.h>
  15#include <linux/spinlock.h>
  16
  17#include <media/media-entity.h>
  18#include <media/v4l2-dev.h>
  19#include <media/videobuf2-v4l2.h>
  20
  21#include "vsp1_entity.h"
  22
  23struct vsp1_device;
  24
  25#define HISTO_PAD_SINK                          0
  26#define HISTO_PAD_SOURCE                        1
  27
  28struct vsp1_histogram_buffer {
  29        struct vb2_v4l2_buffer buf;
  30        struct list_head queue;
  31        void *addr;
  32};
  33
  34struct vsp1_histogram {
  35        struct vsp1_entity entity;
  36        struct video_device video;
  37        struct media_pad pad;
  38
  39        const u32 *formats;
  40        unsigned int num_formats;
  41        size_t data_size;
  42        u32 meta_format;
  43
  44        struct mutex lock;
  45        struct vb2_queue queue;
  46
  47        spinlock_t irqlock;
  48        struct list_head irqqueue;
  49
  50        wait_queue_head_t wait_queue;
  51        bool readout;
  52};
  53
  54static inline struct vsp1_histogram *vdev_to_histo(struct video_device *vdev)
  55{
  56        return container_of(vdev, struct vsp1_histogram, video);
  57}
  58
  59static inline struct vsp1_histogram *subdev_to_histo(struct v4l2_subdev *subdev)
  60{
  61        return container_of(subdev, struct vsp1_histogram, entity.subdev);
  62}
  63
  64int vsp1_histogram_init(struct vsp1_device *vsp1, struct vsp1_histogram *histo,
  65                        enum vsp1_entity_type type, const char *name,
  66                        const struct vsp1_entity_operations *ops,
  67                        const unsigned int *formats, unsigned int num_formats,
  68                        size_t data_size, u32 meta_format);
  69void vsp1_histogram_destroy(struct vsp1_entity *entity);
  70
  71struct vsp1_histogram_buffer *
  72vsp1_histogram_buffer_get(struct vsp1_histogram *histo);
  73void vsp1_histogram_buffer_complete(struct vsp1_histogram *histo,
  74                                    struct vsp1_histogram_buffer *buf,
  75                                    size_t size);
  76
  77#endif /* __VSP1_HISTO_H__ */
  78