drivers/media/platform/vsp1/vsp1_histo.h

   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
  23 struct vsp1_device;
  24
  25 #define HISTO_PAD_SINK                          0
  26 #define HISTO_PAD_SOURCE                        1
  27
  28 struct vsp1_histogram_buffer {
  29         struct vb2_v4l2_buffer buf;
  30         struct list_head queue;
  31         void *addr;
  32 };
  33
  34 struct 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
  54 static inline struct vsp1_histogram *vdev_to_histo(struct video_device *vdev)
  55 {
  56         return container_of(vdev, struct vsp1_histogram, video);
  57 }
  58
  59 static inline struct vsp1_histogram *subdev_to_histo(struct v4l2_subdev *subdev)
  60 {
  61         return container_of(subdev, struct vsp1_histogram, entity.subdev);
  62 }
  63
  64 int 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);
  69 void vsp1_histogram_destroy(struct vsp1_entity *entity);
  70
  71 struct vsp1_histogram_buffer *
  72 vsp1_histogram_buffer_get(struct vsp1_histogram *histo);
  73 void vsp1_histogram_buffer_complete(struct vsp1_histogram *histo,
  74                                     struct vsp1_histogram_buffer *buf,
  75                                     size_t size);
  76
  77 #endif /* __VSP1_HISTO_H__ */