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. */
  14 struct 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 }
  35 EXPORT_SYMBOL(fimc_find_remote_sensor);
  36
  37 void __fimc_vidioc_querycap(struct device *dev, struct v4l2_capability *cap,
  38                                                 unsigned int caps)
  39 {
  40         strscpy(cap->driver, dev->driver->name, sizeof(cap->driver));
  41         strscpy(cap->card, dev->driver->name, sizeof(cap->card));
  42         snprintf(cap->bus_info, sizeof(cap->bus_info),
  43                                 "platform:%s", dev_name(dev));
  44         cap->device_caps = caps;
  45         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
  46 }
  47 EXPORT_SYMBOL(__fimc_vidioc_querycap);
  48
  49 MODULE_LICENSE("GPL");