drivers/media/platform/samsung/exynos4-is/common.c

Source file repositories/reference/linux-study-clean/drivers/media/platform/samsung/exynos4-is/common.c

File Facts

System
Linux kernel
Corpus path
drivers/media/platform/samsung/exynos4-is/common.c
Extension
.c
Size
1293 bytes
Lines
49
Domain
Driver Families
Bucket
drivers/media
Inferred role
Driver Families: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Samsung S5P/EXYNOS4 SoC Camera Subsystem driver
 *
 * Copyright (C) 2013 Samsung Electronics Co., Ltd.
 * Author: Sylwester Nawrocki <s.nawrocki@samsung.com>
 */

#include <linux/module.h>
#include <media/drv-intf/exynos-fimc.h>
#include "common.h"

/*
 * Called with the media graph mutex held or media_entity_is_streaming(entity)
 * true.
 */
struct v4l2_subdev *fimc_find_remote_sensor(struct media_entity *entity)
{
	struct media_pad *pad = &entity->pads[0];
	struct v4l2_subdev *sd;

	while (pad->flags & MEDIA_PAD_FL_SINK) {
		/* source pad */
		pad = media_pad_remote_pad_first(pad);
		if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
			break;

		sd = media_entity_to_v4l2_subdev(pad->entity);

		if (sd->grp_id == GRP_ID_FIMC_IS_SENSOR ||
		    sd->grp_id == GRP_ID_SENSOR)
			return sd;
		/* sink pad */
		pad = &sd->entity.pads[0];
	}
	return NULL;
}
EXPORT_SYMBOL(fimc_find_remote_sensor);

void __fimc_vidioc_querycap(struct device *dev, struct v4l2_capability *cap)
{
	strscpy(cap->driver, dev->driver->name, sizeof(cap->driver));
	strscpy(cap->card, dev->driver->name, sizeof(cap->card));
}
EXPORT_SYMBOL(__fimc_vidioc_querycap);

MODULE_DESCRIPTION("Samsung S5P/EXYNOS4 SoC Camera Subsystem driver");
MODULE_LICENSE("GPL");

Annotation

Implementation Notes