linux/drivers/media/platform/renesas/vsp1/vsp1_histo.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * vsp1_histo.c  --  R-Car VSP1 Histogram API
 *
 * Copyright (C) 2016 Renesas Electronics Corporation
 * Copyright (C) 2016 Laurent Pinchart
 *
 * Contact: Laurent Pinchart ([email protected])
 */

#include <linux/device.h>
#include <linux/gfp.h>

#include <media/v4l2-ioctl.h>
#include <media/v4l2-subdev.h>
#include <media/videobuf2-vmalloc.h>

#include "vsp1.h"
#include "vsp1_histo.h"
#include "vsp1_pipe.h"

#define HISTO_MIN_SIZE …
#define HISTO_MAX_SIZE …

/* -----------------------------------------------------------------------------
 * Buffer Operations
 */

static inline struct vsp1_histogram_buffer *
to_vsp1_histogram_buffer(struct vb2_v4l2_buffer *vbuf)
{ … }

struct vsp1_histogram_buffer *
vsp1_histogram_buffer_get(struct vsp1_histogram *histo)
{ … }

void vsp1_histogram_buffer_complete(struct vsp1_histogram *histo,
				    struct vsp1_histogram_buffer *buf,
				    size_t size)
{ … }

/* -----------------------------------------------------------------------------
 * videobuf2 Queue Operations
 */

static int histo_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers,
			     unsigned int *nplanes, unsigned int sizes[],
			     struct device *alloc_devs[])
{ … }

static int histo_buffer_prepare(struct vb2_buffer *vb)
{ … }

static void histo_buffer_queue(struct vb2_buffer *vb)
{ … }

static int histo_start_streaming(struct vb2_queue *vq, unsigned int count)
{ … }

static void histo_stop_streaming(struct vb2_queue *vq)
{ … }

static const struct vb2_ops histo_video_queue_qops = …;

/* -----------------------------------------------------------------------------
 * V4L2 Subdevice Operations
 */

static int histo_enum_mbus_code(struct v4l2_subdev *subdev,
				struct v4l2_subdev_state *sd_state,
				struct v4l2_subdev_mbus_code_enum *code)
{ … }

static int histo_enum_frame_size(struct v4l2_subdev *subdev,
				 struct v4l2_subdev_state *sd_state,
				 struct v4l2_subdev_frame_size_enum *fse)
{ … }

static int histo_get_selection(struct v4l2_subdev *subdev,
			       struct v4l2_subdev_state *sd_state,
			       struct v4l2_subdev_selection *sel)
{ … }

static int histo_set_crop(struct v4l2_subdev *subdev,
			  struct v4l2_subdev_state *sd_state,
			  struct v4l2_subdev_selection *sel)
{ … }

static int histo_set_compose(struct v4l2_subdev *subdev,
			     struct v4l2_subdev_state *sd_state,
			     struct v4l2_subdev_selection *sel)
{ … }

static int histo_set_selection(struct v4l2_subdev *subdev,
			       struct v4l2_subdev_state *sd_state,
			       struct v4l2_subdev_selection *sel)
{ … }

static int histo_set_format(struct v4l2_subdev *subdev,
			    struct v4l2_subdev_state *sd_state,
			    struct v4l2_subdev_format *fmt)
{ … }

static const struct v4l2_subdev_pad_ops histo_pad_ops = …;

static const struct v4l2_subdev_ops histo_ops = …;

/* -----------------------------------------------------------------------------
 * V4L2 ioctls
 */

static int histo_v4l2_querycap(struct file *file, void *fh,
			       struct v4l2_capability *cap)
{ … }

static int histo_v4l2_enum_format(struct file *file, void *fh,
				  struct v4l2_fmtdesc *f)
{ … }

static int histo_v4l2_get_format(struct file *file, void *fh,
				 struct v4l2_format *format)
{ … }

static const struct v4l2_ioctl_ops histo_v4l2_ioctl_ops = …;

/* -----------------------------------------------------------------------------
 * V4L2 File Operations
 */

static const struct v4l2_file_operations histo_v4l2_fops = …;

static void vsp1_histogram_cleanup(struct vsp1_histogram *histo)
{ … }

void vsp1_histogram_destroy(struct vsp1_entity *entity)
{ … }

int vsp1_histogram_init(struct vsp1_device *vsp1, struct vsp1_histogram *histo,
			enum vsp1_entity_type type, const char *name,
			const struct vsp1_entity_operations *ops,
			const unsigned int *formats, unsigned int num_formats,
			size_t data_size, u32 meta_format)
{ … }