drivers/staging/media/imx/imx-media-internal-sd.c

File Facts

System

Linux kernel

Corpus path

drivers/staging/media/imx/imx-media-internal-sd.c

Extension

.c

Size

6681 bytes

Lines

307

Domain

Driver Families

Bucket

drivers/staging

Inferred role

Driver Families: implementation source

Status

source 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.

• 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.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/platform_device.h
• imx-media.h

Detected Declarations

• struct internal_subdev
• struct internal_link
• struct internal_pad
• struct internal_subdev
• function create_internal_link
• function create_ipu_internal_links
• function imx_media_register_ipu_internal_subdevs
• function imx_media_unregister_ipu_internal_subdevs

Annotated Snippet

struct internal_link {
	int remote;
	int local_pad;
	int remote_pad;
};

struct internal_pad {
	int num_links;
	struct internal_link link[MAX_INTERNAL_LINKS];
};

struct internal_subdev {
	u32 grp_id;
	struct internal_pad pad[MAX_INTERNAL_PADS];

	struct v4l2_subdev * (*sync_register)(struct v4l2_device *v4l2_dev,
					      struct device *ipu_dev,
					      struct ipu_soc *ipu,
					      u32 grp_id);
	int (*sync_unregister)(struct v4l2_subdev *sd);
};

static const struct internal_subdev int_subdev[NUM_IPU_SUBDEVS] = {
	[IPU_CSI0] = {
		.grp_id = IMX_MEDIA_GRP_ID_IPU_CSI0,
		.pad[CSI_SRC_PAD_DIRECT] = {
			.num_links = 2,
			.link = {
				{
					.local_pad = CSI_SRC_PAD_DIRECT,
					.remote = IPU_IC_PRP,
					.remote_pad = PRP_SINK_PAD,
				}, {
					.local_pad = CSI_SRC_PAD_DIRECT,
					.remote = IPU_VDIC,
					.remote_pad = VDIC_SINK_PAD_DIRECT,
				},
			},
		},
	},

	[IPU_CSI1] = {
		.grp_id = IMX_MEDIA_GRP_ID_IPU_CSI1,
		.pad[CSI_SRC_PAD_DIRECT] = {
			.num_links = 2,
			.link = {
				{
					.local_pad = CSI_SRC_PAD_DIRECT,
					.remote = IPU_IC_PRP,
					.remote_pad = PRP_SINK_PAD,
				}, {
					.local_pad = CSI_SRC_PAD_DIRECT,
					.remote = IPU_VDIC,
					.remote_pad = VDIC_SINK_PAD_DIRECT,
				},
			},
		},
	},

	[IPU_VDIC] = {
		.grp_id = IMX_MEDIA_GRP_ID_IPU_VDIC,
		.sync_register = imx_media_vdic_register,
		.sync_unregister = imx_media_vdic_unregister,
		.pad[VDIC_SRC_PAD_DIRECT] = {
			.num_links = 1,
			.link = {
				{
					.local_pad = VDIC_SRC_PAD_DIRECT,
					.remote = IPU_IC_PRP,
					.remote_pad = PRP_SINK_PAD,
				},
			},
		},
	},

	[IPU_IC_PRP] = {
		.grp_id = IMX_MEDIA_GRP_ID_IPU_IC_PRP,
		.sync_register = imx_media_ic_register,
		.sync_unregister = imx_media_ic_unregister,
		.pad[PRP_SRC_PAD_PRPENC] = {
			.num_links = 1,
			.link = {
				{
					.local_pad = PRP_SRC_PAD_PRPENC,
					.remote = IPU_IC_PRPENC,
					.remote_pad = PRPENCVF_SINK_PAD,
				},
			},
		},
		.pad[PRP_SRC_PAD_PRPVF] = {

Annotation

• Immediate include surface: `linux/platform_device.h`, `imx-media.h`.
• Detected declarations: `struct internal_subdev`, `struct internal_link`, `struct internal_pad`, `struct internal_subdev`, `function create_internal_link`, `function create_ipu_internal_links`, `function imx_media_register_ipu_internal_subdevs`, `function imx_media_unregister_ipu_internal_subdevs`.
• Atlas domain: Driver Families / drivers/staging.
• Implementation status: source implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.