1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Samsung S5P/EXYNOS4 SoC Camera Subsystem driver
4 *
5 * Copyright (C) 2013 Samsung Electronics Co., Ltd.
6 * Author: Sylwester Nawrocki <s.nawrocki@samsung.com>
7 */
8
9#include <linux/module.h>
10#include <media/drv-intf/exynos-fimc.h>
11#include "common.h"
12
13/* Called with the media graph mutex held or entity->stream_count > 0. */
14struct v4l2_subdev *fimc_find_remote_sensor(struct media_entity *entity)
15{
16	struct media_pad *pad = &entity->pads[0];
17	struct v4l2_subdev *sd;
18
19	while (pad->flags & MEDIA_PAD_FL_SINK) {
20		/* source pad */
21		pad = media_entity_remote_pad(pad);
22		if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
23			break;
24
25		sd = media_entity_to_v4l2_subdev(pad->entity);
26
27		if (sd->grp_id == GRP_ID_FIMC_IS_SENSOR ||
28		    sd->grp_id == GRP_ID_SENSOR)
29			return sd;
30		/* sink pad */
31		pad = &sd->entity.pads[0];
32	}
33	return NULL;
34}
35EXPORT_SYMBOL(fimc_find_remote_sensor);
36
37void __fimc_vidioc_querycap(struct device *dev, struct v4l2_capability *cap)
38{
39	strscpy(cap->driver, dev->driver->name, sizeof(cap->driver));
40	strscpy(cap->card, dev->driver->name, sizeof(cap->card));
41	snprintf(cap->bus_info, sizeof(cap->bus_info),
42				"platform:%s", dev_name(dev));
43}
44EXPORT_SYMBOL(__fimc_vidioc_querycap);
45
46MODULE_LICENSE("GPL");
47