drivers/media/platform/nxp/imx-pxp.c

File Facts

System

Linux kernel

Corpus path

drivers/media/platform/nxp/imx-pxp.c

Extension

.c

Size

55292 bytes

Lines

1948

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.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Touches IRQ or DMA behavior; this matters for the representative real-device path.
• 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/bitfield.h
• linux/clk.h
• linux/delay.h
• linux/dma-mapping.h
• linux/interrupt.h
• linux/io.h
• linux/iopoll.h
• linux/module.h
• linux/of.h
• linux/platform_device.h
• linux/regmap.h
• linux/sched.h
• linux/slab.h
• media/media-device.h
• media/v4l2-ctrls.h
• media/v4l2-device.h
• media/v4l2-event.h
• media/v4l2-ioctl.h
• media/v4l2-mem2mem.h
• media/videobuf2-dma-contig.h
• imx-pxp.h

Detected Declarations

• struct pxp_fmt
• struct pxp_q_data
• struct pxp_ctx
• struct pxp_pdata
• struct pxp_dev
• struct pxp_ctx
• function pxp_read
• function pxp_write
• function pxp_v4l2_pix_fmt_to_ps_format
• function pxp_v4l2_pix_fmt_to_out_format
• function pxp_v4l2_pix_fmt_is_yuv
• function pxp_setup_csc
• function pxp_imx6ull_data_path_ctrl0
• function pxp_imx7d_data_path_ctrl0
• function pxp_set_data_path
• function pxp_start
• function pxp_job_finish
• function pxp_device_run
• function pxp_job_ready
• function pxp_job_abort
• function pxp_irq_handler
• function pxp_querycap
• function pxp_enum_fmt
• function pxp_enum_fmt_vid_cap
• function pxp_enum_fmt_vid_out
• function pxp_g_fmt
• function pxp_g_fmt_vid_out
• function pxp_g_fmt_vid_cap
• function pxp_bytesperline
• function pxp_sizeimage
• function pxp_try_fmt
• function pxp_fixup_colorimetry_cap
• function pxp_try_fmt_vid_cap
• function pxp_try_fmt_vid_out
• function pxp_s_fmt
• function pxp_s_fmt_vid_cap
• function pxp_s_fmt_vid_out
• function pxp_enum_framesizes
• function pxp_degrees_to_rot_mode
• function pxp_s_ctrl
• function pxp_queue_setup
• function pxp_buf_prepare
• function pxp_buf_queue
• function pxp_start_streaming
• function pxp_stop_streaming
• function queue_init
• function pxp_open
• function pxp_release

Annotated Snippet

struct pxp_fmt {
	u32	fourcc;
	int	depth;
	/* Types the format can be used for */
	u32	types;
};

static struct pxp_fmt formats[] = {
	{
		.fourcc	= V4L2_PIX_FMT_XBGR32,
		.depth	= 32,
		/* Both capture and output format */
		.types	= MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
	}, {
		.fourcc	= V4L2_PIX_FMT_ABGR32,
		.depth	= 32,
		/* Capture-only format */
		.types	= MEM2MEM_CAPTURE,
	}, {
		.fourcc	= V4L2_PIX_FMT_BGR24,
		.depth	= 24,
		.types	= MEM2MEM_CAPTURE,
	}, {
		.fourcc	= V4L2_PIX_FMT_RGB565,
		.depth	= 16,
		.types	= MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
	}, {
		.fourcc	= V4L2_PIX_FMT_RGB555,
		.depth	= 16,
		.types	= MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
	}, {
		.fourcc = V4L2_PIX_FMT_RGB444,
		.depth	= 16,
		.types	= MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
	}, {
		.fourcc = V4L2_PIX_FMT_VUYA32,
		.depth	= 32,
		.types	= MEM2MEM_CAPTURE,
	}, {
		.fourcc = V4L2_PIX_FMT_VUYX32,
		.depth	= 32,
		.types	= MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
	}, {
		.fourcc = V4L2_PIX_FMT_UYVY,
		.depth	= 16,
		.types	= MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
	}, {
		.fourcc = V4L2_PIX_FMT_YUYV,
		.depth	= 16,
		/* Output-only format */
		.types	= MEM2MEM_OUTPUT,
	}, {
		.fourcc = V4L2_PIX_FMT_VYUY,
		.depth	= 16,
		.types	= MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
	}, {
		.fourcc = V4L2_PIX_FMT_YVYU,
		.depth	= 16,
		.types	= MEM2MEM_OUTPUT,
	}, {
		.fourcc = V4L2_PIX_FMT_GREY,
		.depth	= 8,
		.types	= MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
	}, {
		.fourcc = V4L2_PIX_FMT_Y4,
		.depth	= 4,
		.types	= MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
	}, {
		.fourcc = V4L2_PIX_FMT_NV16,
		.depth	= 16,
		.types	= MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
	}, {
		.fourcc = V4L2_PIX_FMT_NV12,
		.depth	= 12,
		.types	= MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
	}, {
		.fourcc = V4L2_PIX_FMT_NV21,
		.depth	= 12,
		.types	= MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
	}, {
		.fourcc = V4L2_PIX_FMT_NV61,
		.depth	= 16,
		.types	= MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
	}, {
		.fourcc = V4L2_PIX_FMT_YUV422P,
		.depth	= 16,
		.types	= MEM2MEM_OUTPUT,
	}, {
		.fourcc = V4L2_PIX_FMT_YUV420,
		.depth	= 12,

Annotation

• Immediate include surface: `linux/bitfield.h`, `linux/clk.h`, `linux/delay.h`, `linux/dma-mapping.h`, `linux/interrupt.h`, `linux/io.h`, `linux/iopoll.h`, `linux/module.h`.
• Detected declarations: `struct pxp_fmt`, `struct pxp_q_data`, `struct pxp_ctx`, `struct pxp_pdata`, `struct pxp_dev`, `struct pxp_ctx`, `function pxp_read`, `function pxp_write`, `function pxp_v4l2_pix_fmt_to_ps_format`, `function pxp_v4l2_pix_fmt_to_out_format`.
• Atlas domain: Driver Families / drivers/media.
• Implementation status: source implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.
• IRQ or DMA behavior appears here, which is relevant to the selected PCIe/NVMe device path.

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.