linux/drivers/media/platform/nxp/imx8-isi/imx8-isi-crossbar.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * i.MX8 ISI - Input crossbar switch
 *
 * Copyright (c) 2022 Laurent Pinchart <[email protected]>
 */

#include <linux/device.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/minmax.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/types.h>

#include <media/media-entity.h>
#include <media/v4l2-subdev.h>

#include "imx8-isi-core.h"

static inline struct mxc_isi_crossbar *to_isi_crossbar(struct v4l2_subdev *sd)
{ … }

static int mxc_isi_crossbar_gasket_enable(struct mxc_isi_crossbar *xbar,
					  struct v4l2_subdev_state *state,
					  struct v4l2_subdev *remote_sd,
					  u32 remote_pad, unsigned int port)
{ … }

static void mxc_isi_crossbar_gasket_disable(struct mxc_isi_crossbar *xbar,
					    unsigned int port)
{ … }

/* -----------------------------------------------------------------------------
 * V4L2 subdev operations
 */

static const struct v4l2_mbus_framefmt mxc_isi_crossbar_default_format = …;

static int __mxc_isi_crossbar_set_routing(struct v4l2_subdev *sd,
					  struct v4l2_subdev_state *state,
					  struct v4l2_subdev_krouting *routing)
{ … }

static struct v4l2_subdev *
mxc_isi_crossbar_xlate_streams(struct mxc_isi_crossbar *xbar,
			       struct v4l2_subdev_state *state,
			       u32 source_pad, u64 source_streams,
			       u32 *__sink_pad, u64 *__sink_streams,
			       u32 *remote_pad)
{ … }

static int mxc_isi_crossbar_init_state(struct v4l2_subdev *sd,
				       struct v4l2_subdev_state *state)
{ … }

static int mxc_isi_crossbar_enum_mbus_code(struct v4l2_subdev *sd,
					   struct v4l2_subdev_state *state,
					   struct v4l2_subdev_mbus_code_enum *code)
{ … }

static int mxc_isi_crossbar_set_fmt(struct v4l2_subdev *sd,
				    struct v4l2_subdev_state *state,
				    struct v4l2_subdev_format *fmt)
{ … }

static int mxc_isi_crossbar_set_routing(struct v4l2_subdev *sd,
					struct v4l2_subdev_state *state,
					enum v4l2_subdev_format_whence which,
					struct v4l2_subdev_krouting *routing)
{ … }

static int mxc_isi_crossbar_enable_streams(struct v4l2_subdev *sd,
					   struct v4l2_subdev_state *state,
					   u32 pad, u64 streams_mask)
{ … }

static int mxc_isi_crossbar_disable_streams(struct v4l2_subdev *sd,
					    struct v4l2_subdev_state *state,
					    u32 pad, u64 streams_mask)
{ … }

static const struct v4l2_subdev_pad_ops mxc_isi_crossbar_subdev_pad_ops = …;

static const struct v4l2_subdev_ops mxc_isi_crossbar_subdev_ops = …;

static const struct v4l2_subdev_internal_ops mxc_isi_crossbar_internal_ops = …;

static const struct media_entity_operations mxc_isi_cross_entity_ops = …;

/* -----------------------------------------------------------------------------
 * Init & cleanup
 */

int mxc_isi_crossbar_init(struct mxc_isi_dev *isi)
{ … }

void mxc_isi_crossbar_cleanup(struct mxc_isi_crossbar *xbar)
{ … }

int mxc_isi_crossbar_register(struct mxc_isi_crossbar *xbar)
{ … }

void mxc_isi_crossbar_unregister(struct mxc_isi_crossbar *xbar)
{ … }