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/*
14 * Called with the media graph mutex held or media_entity_is_streaming(entity)
15 * true.
16 */
17struct v4l2_subdev *fimc_find_remote_sensor(struct media_entity *entity)
18{
19	struct media_pad *pad = &entity->pads[0];
20	struct v4l2_subdev *sd;
21
22	while (pad->flags & MEDIA_PAD_FL_SINK) {
23		/* source pad */
24		pad = media_pad_remote_pad_first(pad);
25		if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
26			break;
27
28		sd = media_entity_to_v4l2_subdev(pad->entity);
29
30		if (sd->grp_id == GRP_ID_FIMC_IS_SENSOR ||
31		    sd->grp_id == GRP_ID_SENSOR)
32			return sd;
33		/* sink pad */
34		pad = &sd->entity.pads[0];
35	}
36	return NULL;
37}
38EXPORT_SYMBOL(fimc_find_remote_sensor);
39
40void __fimc_vidioc_querycap(struct device *dev, struct v4l2_capability *cap)
41{
42	strscpy(cap->driver, dev->driver->name, sizeof(cap->driver));
43	strscpy(cap->card, dev->driver->name, sizeof(cap->card));
44}
45EXPORT_SYMBOL(__fimc_vidioc_querycap);
46
47MODULE_LICENSE("GPL");
48