LXR linux/drivers/media/platform/exynos4-is/common.c

   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