drivers/media/platform/renesas/rcar-isp/csisp.c

File Facts

System

Linux kernel

Corpus path

drivers/media/platform/renesas/rcar-isp/csisp.c

Extension

.c

Size

14219 bytes

Lines

591

Domain

Driver Families

Bucket

drivers/media

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.
• Allocates kernel memory; connect allocation flags and lifetime to context constraints.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/module.h
• linux/mutex.h
• linux/of.h
• linux/platform_device.h
• linux/pm_runtime.h
• linux/reset.h
• media/mipi-csi2.h
• media/v4l2-subdev.h

Detected Declarations

• struct rcar_isp_format
• struct rcar_isp
• enum rcar_isp_input
• enum rcar_isp_pads
• function risp_write_cs
• function risp_read_cs
• function risp_power_on
• function risp_power_off
• function risp_start
• function risp_stop
• function risp_enable_streams
• function risp_disable_streams
• function risp_set_pad_format
• function risp_notify_bound
• function risp_notify_unbind
• function risp_parse_dt
• function risp_probe_resources
• function risp_probe
• function risp_remove

Annotated Snippet

struct rcar_isp_format {
	u32 code;
	unsigned int datatype;
	unsigned int procmode;
};

static const struct rcar_isp_format rcar_isp_formats[] = {
	{
		.code = MEDIA_BUS_FMT_RGB888_1X24,
		.datatype = MIPI_CSI2_DT_RGB888,
		.procmode = 0x15
	}, {
		.code = MEDIA_BUS_FMT_Y10_1X10,
		.datatype = MIPI_CSI2_DT_RAW10,
		.procmode = 0x10,
	}, {
		.code = MEDIA_BUS_FMT_UYVY8_1X16,
		.datatype = MIPI_CSI2_DT_YUV422_8B,
		.procmode = 0x0c,
	}, {
		.code = MEDIA_BUS_FMT_YUYV8_1X16,
		.datatype = MIPI_CSI2_DT_YUV422_8B,
		.procmode = 0x0c,
	}, {
		.code = MEDIA_BUS_FMT_UYVY8_2X8,
		.datatype = MIPI_CSI2_DT_YUV422_8B,
		.procmode = 0x0c,
	}, {
		.code = MEDIA_BUS_FMT_YUYV10_2X10,
		.datatype = MIPI_CSI2_DT_YUV422_8B,
		.procmode = 0x0c,
	}, {
		.code = MEDIA_BUS_FMT_SBGGR8_1X8,
		.datatype = MIPI_CSI2_DT_RAW8,
		.procmode = 0x00,
	}, {
		.code = MEDIA_BUS_FMT_SGBRG8_1X8,
		.datatype = MIPI_CSI2_DT_RAW8,
		.procmode = 0x00,
	}, {
		.code = MEDIA_BUS_FMT_SGRBG8_1X8,
		.datatype = MIPI_CSI2_DT_RAW8,
		.procmode = 0x00,
	}, {
		.code = MEDIA_BUS_FMT_SRGGB8_1X8,
		.datatype = MIPI_CSI2_DT_RAW8,
		.procmode = 0x00,
	}, {
		.code = MEDIA_BUS_FMT_SBGGR10_1X10,
		.datatype = MIPI_CSI2_DT_RAW10,
		.procmode = 0x01,
	}, {
		.code = MEDIA_BUS_FMT_SGBRG10_1X10,
		.datatype = MIPI_CSI2_DT_RAW10,
		.procmode = 0x01,
	}, {
		.code = MEDIA_BUS_FMT_SGRBG10_1X10,
		.datatype = MIPI_CSI2_DT_RAW10,
		.procmode = 0x01,
	}, {
		.code = MEDIA_BUS_FMT_SRGGB10_1X10,
		.datatype = MIPI_CSI2_DT_RAW10,
		.procmode = 0x01,
	}, {
		.code = MEDIA_BUS_FMT_SBGGR12_1X12,
		.datatype = MIPI_CSI2_DT_RAW12,
		.procmode = 0x02,
	}, {
		.code = MEDIA_BUS_FMT_SGBRG12_1X12,
		.datatype = MIPI_CSI2_DT_RAW12,
		.procmode = 0x02,
	}, {
		.code = MEDIA_BUS_FMT_SGRBG12_1X12,
		.datatype = MIPI_CSI2_DT_RAW12,
		.procmode = 0x02,
	}, {
		.code = MEDIA_BUS_FMT_SRGGB12_1X12,
		.datatype = MIPI_CSI2_DT_RAW12,
		.procmode = 0x02,
	},
};

static const struct rcar_isp_format *risp_code_to_fmt(unsigned int code)
{
	unsigned int i;

	for (i = 0; i < ARRAY_SIZE(rcar_isp_formats); i++) {
		if (rcar_isp_formats[i].code == code)
			return &rcar_isp_formats[i];
	}

Annotation

• Immediate include surface: `linux/module.h`, `linux/mutex.h`, `linux/of.h`, `linux/platform_device.h`, `linux/pm_runtime.h`, `linux/reset.h`, `media/mipi-csi2.h`, `media/v4l2-subdev.h`.
• Detected declarations: `struct rcar_isp_format`, `struct rcar_isp`, `enum rcar_isp_input`, `enum rcar_isp_pads`, `function risp_write_cs`, `function risp_read_cs`, `function risp_power_on`, `function risp_power_off`, `function risp_start`, `function risp_stop`.
• Atlas domain: Driver Families / drivers/media.
• Implementation status: source implementation candidate.

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.