drivers/media/platform/st/stm32/stm32-dcmipp/dcmipp-input.c

Source file repositories/reference/linux-study-clean/drivers/media/platform/st/stm32/stm32-dcmipp/dcmipp-input.c

File Facts

System: Linux kernel
Corpus path: drivers/media/platform/st/stm32/stm32-dcmipp/dcmipp-input.c
Extension: .c
Size: 16953 bytes
Lines: 551
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/v4l2-mediabus.h
media/mipi-csi2.h
media/v4l2-event.h
media/v4l2-subdev.h
dcmipp-common.h

Detected Declarations

struct dcmipp_inp_pix_map
struct dcmipp_inp_device
function dcmipp_inp_init_state
function dcmipp_inp_enum_mbus_code
function dcmipp_inp_enum_frame_size
function dcmipp_inp_adjust_fmt
function dcmipp_inp_set_fmt
function dcmipp_inp_configure_parallel
function dcmipp_inp_configure_csi
function dcmipp_inp_enable_streams
function dcmipp_inp_disable_streams
function dcmipp_inp_release
function dcmipp_inp_ent_release

Annotated Snippet

struct dcmipp_inp_pix_map {
	unsigned int code_sink;
	unsigned int code_src;
	/* Parallel related information */
	u8 prcr_format;
	u8 prcr_swapcycles;
	/* CSI related information */
	unsigned int dt;
};

#define PIXMAP_SINK_SRC_PRCR_SWAP(sink, src, prcr, swap, data_type)	\
	{							\
		.code_sink = MEDIA_BUS_FMT_##sink,		\
		.code_src = MEDIA_BUS_FMT_##src,		\
		.prcr_format = DCMIPP_PRCR_FORMAT_##prcr,	\
		.prcr_swapcycles = swap,			\
		.dt = data_type,				\
	}
static const struct dcmipp_inp_pix_map dcmipp_inp_pix_map_list[] = {
	/* RGB565 */
	PIXMAP_SINK_SRC_PRCR_SWAP(RGB565_2X8_LE, RGB565_2X8_LE, RGB565, 1, MIPI_CSI2_DT_RGB565),
	PIXMAP_SINK_SRC_PRCR_SWAP(RGB565_2X8_BE, RGB565_2X8_LE, RGB565, 0, MIPI_CSI2_DT_RGB565),
	PIXMAP_SINK_SRC_PRCR_SWAP(RGB565_1X16, RGB565_1X16, RGB565, 0, MIPI_CSI2_DT_RGB565),
	/* RGB888 */
	PIXMAP_SINK_SRC_PRCR_SWAP(RGB888_3X8, RGB888_3X8, RGB888, 0, MIPI_CSI2_DT_RGB888),
	PIXMAP_SINK_SRC_PRCR_SWAP(RGB888_1X24, RGB888_1X24, RGB888, 0, MIPI_CSI2_DT_RGB888),
	/* YUV422 */
	PIXMAP_SINK_SRC_PRCR_SWAP(YUYV8_2X8, YUYV8_2X8, YUV422, 1, MIPI_CSI2_DT_YUV422_8B),
	PIXMAP_SINK_SRC_PRCR_SWAP(YUYV8_1X16, YUYV8_1X16, YUV422, 0, MIPI_CSI2_DT_YUV422_8B),
	PIXMAP_SINK_SRC_PRCR_SWAP(YUYV8_2X8, UYVY8_2X8, YUV422, 0, MIPI_CSI2_DT_YUV422_8B),
	PIXMAP_SINK_SRC_PRCR_SWAP(UYVY8_2X8, UYVY8_2X8, YUV422, 1, MIPI_CSI2_DT_YUV422_8B),
	PIXMAP_SINK_SRC_PRCR_SWAP(UYVY8_1X16, UYVY8_1X16, YUV422, 0, MIPI_CSI2_DT_YUV422_8B),
	PIXMAP_SINK_SRC_PRCR_SWAP(UYVY8_2X8, YUYV8_2X8, YUV422, 0, MIPI_CSI2_DT_YUV422_8B),
	PIXMAP_SINK_SRC_PRCR_SWAP(YVYU8_2X8, YVYU8_2X8, YUV422, 1, MIPI_CSI2_DT_YUV422_8B),
	PIXMAP_SINK_SRC_PRCR_SWAP(YVYU8_1X16, YVYU8_1X16, YUV422, 0, MIPI_CSI2_DT_YUV422_8B),
	PIXMAP_SINK_SRC_PRCR_SWAP(VYUY8_2X8, VYUY8_2X8, YUV422, 1, MIPI_CSI2_DT_YUV422_8B),
	PIXMAP_SINK_SRC_PRCR_SWAP(VYUY8_1X16, VYUY8_1X16, YUV422, 0, MIPI_CSI2_DT_YUV422_8B),
	/* GREY */
	PIXMAP_SINK_SRC_PRCR_SWAP(Y8_1X8, Y8_1X8, G8, 0, MIPI_CSI2_DT_RAW8),
	PIXMAP_SINK_SRC_PRCR_SWAP(Y10_1X10, Y10_1X10, G10, 0, MIPI_CSI2_DT_RAW10),
	PIXMAP_SINK_SRC_PRCR_SWAP(Y12_1X12, Y12_1X12, G12, 0, MIPI_CSI2_DT_RAW12),
	PIXMAP_SINK_SRC_PRCR_SWAP(Y14_1X14, Y14_1X14, G14, 0, MIPI_CSI2_DT_RAW14),
	/* Raw Bayer */
	PIXMAP_SINK_SRC_PRCR_SWAP(SBGGR8_1X8, SBGGR8_1X8, RAW8, 0, MIPI_CSI2_DT_RAW8),
	PIXMAP_SINK_SRC_PRCR_SWAP(SGBRG8_1X8, SGBRG8_1X8, RAW8, 0, MIPI_CSI2_DT_RAW8),
	PIXMAP_SINK_SRC_PRCR_SWAP(SGRBG8_1X8, SGRBG8_1X8, RAW8, 0, MIPI_CSI2_DT_RAW8),
	PIXMAP_SINK_SRC_PRCR_SWAP(SRGGB8_1X8, SRGGB8_1X8, RAW8, 0, MIPI_CSI2_DT_RAW8),
	PIXMAP_SINK_SRC_PRCR_SWAP(SBGGR10_1X10, SBGGR10_1X10, RAW10, 0, MIPI_CSI2_DT_RAW10),
	PIXMAP_SINK_SRC_PRCR_SWAP(SGBRG10_1X10, SGBRG10_1X10, RAW10, 0, MIPI_CSI2_DT_RAW10),
	PIXMAP_SINK_SRC_PRCR_SWAP(SGRBG10_1X10, SGRBG10_1X10, RAW10, 0, MIPI_CSI2_DT_RAW10),
	PIXMAP_SINK_SRC_PRCR_SWAP(SRGGB10_1X10, SRGGB10_1X10, RAW10, 0, MIPI_CSI2_DT_RAW10),
	PIXMAP_SINK_SRC_PRCR_SWAP(SBGGR12_1X12, SBGGR12_1X12, RAW12, 0, MIPI_CSI2_DT_RAW12),
	PIXMAP_SINK_SRC_PRCR_SWAP(SGBRG12_1X12, SGBRG12_1X12, RAW12, 0, MIPI_CSI2_DT_RAW12),
	PIXMAP_SINK_SRC_PRCR_SWAP(SGRBG12_1X12, SGRBG12_1X12, RAW12, 0, MIPI_CSI2_DT_RAW12),
	PIXMAP_SINK_SRC_PRCR_SWAP(SRGGB12_1X12, SRGGB12_1X12, RAW12, 0, MIPI_CSI2_DT_RAW12),
	PIXMAP_SINK_SRC_PRCR_SWAP(SBGGR14_1X14, SBGGR14_1X14, RAW14, 0, MIPI_CSI2_DT_RAW14),
	PIXMAP_SINK_SRC_PRCR_SWAP(SGBRG14_1X14, SGBRG14_1X14, RAW14, 0, MIPI_CSI2_DT_RAW14),
	PIXMAP_SINK_SRC_PRCR_SWAP(SGRBG14_1X14, SGRBG14_1X14, RAW14, 0, MIPI_CSI2_DT_RAW14),
	PIXMAP_SINK_SRC_PRCR_SWAP(SRGGB14_1X14, SRGGB14_1X14, RAW14, 0, MIPI_CSI2_DT_RAW14),
	/* JPEG */
	PIXMAP_SINK_SRC_PRCR_SWAP(JPEG_1X8, JPEG_1X8, BYTE_STREAM, 0, 0),
};

/*
 * Search through the pix_map table, skipping two consecutive entry with the
 * same code
 */
static inline const struct dcmipp_inp_pix_map *dcmipp_inp_pix_map_by_index
						(unsigned int index,
						 unsigned int pad)
{
	unsigned int i = 0;
	u32 prev_code = 0, cur_code;

	while (i < ARRAY_SIZE(dcmipp_inp_pix_map_list)) {
		if (IS_SRC(pad))
			cur_code = dcmipp_inp_pix_map_list[i].code_src;
		else
			cur_code = dcmipp_inp_pix_map_list[i].code_sink;

		if (cur_code == prev_code) {
			i++;
			continue;
		}
		prev_code = cur_code;

		if (index == 0)
			break;
		i++;
		index--;

Annotation

Immediate include surface: `linux/v4l2-mediabus.h`, `media/mipi-csi2.h`, `media/v4l2-event.h`, `media/v4l2-subdev.h`, `dcmipp-common.h`.
Detected declarations: `struct dcmipp_inp_pix_map`, `struct dcmipp_inp_device`, `function dcmipp_inp_init_state`, `function dcmipp_inp_enum_mbus_code`, `function dcmipp_inp_enum_frame_size`, `function dcmipp_inp_adjust_fmt`, `function dcmipp_inp_set_fmt`, `function dcmipp_inp_configure_parallel`, `function dcmipp_inp_configure_csi`, `function dcmipp_inp_enable_streams`.
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.