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

   1/*
   2 * Samsung S5P/EXYNOS4 SoC Camera Subsystem driver
   3 *
   4 * Copyright (C) 2013 Samsung Electronics Co., Ltd.
   5 * Author: Sylwester Nawrocki <s.nawrocki@samsung.com>
   6 *
   7 * This program is free software; you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License version 2 as
   9 * published by the Free Software Foundation.
  10 */
  11
  12#include <linux/module.h>
  13#include <media/s5p_fimc.h>
  14#include "common.h"
  15
  16/* Called with the media graph mutex held or entity->stream_count > 0. */
  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_entity_remote_pad(pad);
  25                if (pad == NULL ||
  26                    media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
  27                        break;
  28
  29                sd = media_entity_to_v4l2_subdev(pad->entity);
  30
  31                if (sd->grp_id == GRP_ID_FIMC_IS_SENSOR ||
  32                    sd->grp_id == GRP_ID_SENSOR)
  33                        return sd;
  34                /* sink pad */
  35                pad = &sd->entity.pads[0];
  36        }
  37        return NULL;
  38}
  39EXPORT_SYMBOL(fimc_find_remote_sensor);
  40
  41void __fimc_vidioc_querycap(struct device *dev, struct v4l2_capability *cap,
  42                                                unsigned int caps)
  43{
  44        strlcpy(cap->driver, dev->driver->name, sizeof(cap->driver));
  45        strlcpy(cap->card, dev->driver->name, sizeof(cap->card));
  46        snprintf(cap->bus_info, sizeof(cap->bus_info),
  47                                "platform:%s", dev_name(dev));
  48        cap->device_caps = caps;
  49        cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
  50}
  51EXPORT_SYMBOL(__fimc_vidioc_querycap);
  52
  53MODULE_LICENSE("GPL");
  54