drivers/media/platform/samsung/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 /*
  14  * Called with the media graph mutex held or media_entity_is_streaming(entity)
  15  * true.
  16  */
  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_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 }
  38 EXPORT_SYMBOL(fimc_find_remote_sensor);
  39
  40 void __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 }
  45 EXPORT_SYMBOL(__fimc_vidioc_querycap);
  46
  47 MODULE_DESCRIPTION("Samsung S5P/EXYNOS4 SoC Camera Subsystem driver");
  48 MODULE_LICENSE("GPL");