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