kernel/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/exynos-fimc.h>
  14 #include "common.h"
  15
  16 /* Called with the media graph mutex held or entity->stream_count > 0. */
  17 struct 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 }
  39 EXPORT_SYMBOL(fimc_find_remote_sensor);
  40
  41 void __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 }
  51 EXPORT_SYMBOL(__fimc_vidioc_querycap);
  52
  53 MODULE_LICENSE("GPL");