drivers/media/pci/cx88/cx88-video.c

File Facts

System

Linux kernel

Corpus path

drivers/media/pci/cx88/cx88-video.c

Extension

.c

Size

43864 bytes

Lines

1634

Domain

Driver Families

Bucket

drivers/media

Inferred role

Driver Families: operation-table or driver-model contract

Status

pattern 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.
• Defines an operation table; this is where Linux turns generic core objects into subsystem-specific behavior.
• 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

• cx88.h
• linux/init.h
• linux/list.h
• linux/module.h
• linux/kmod.h
• linux/kernel.h
• linux/slab.h
• linux/interrupt.h
• linux/dma-mapping.h
• linux/delay.h
• linux/kthread.h
• asm/div64.h
• media/v4l2-common.h
• media/v4l2-ioctl.h
• media/v4l2-event.h
• media/i2c/wm8775.h

Detected Declarations

• struct cx88_ctrl
• function cx88_video_mux
• function start_video_dma
• function stop_video_dma
• function restart_video_queue
• function queue_setup
• function buffer_prepare
• function buffer_finish
• function buffer_queue
• function start_streaming
• function stop_streaming
• function radio_open
• function cx8800_s_vid_ctrl
• function cx8800_s_aud_ctrl
• function vidioc_g_fmt_vid_cap
• function vidioc_try_fmt_vid_cap
• function vidioc_s_fmt_vid_cap
• function cx88_querycap
• function vidioc_querycap
• function vidioc_enum_fmt_vid_cap
• function vidioc_g_std
• function vidioc_s_std
• function cx88_enum_input
• function vidioc_enum_input
• function vidioc_g_input
• function vidioc_s_input
• function vidioc_g_tuner
• function vidioc_s_tuner
• function vidioc_g_frequency
• function cx88_set_freq
• function vidioc_s_frequency
• function vidioc_g_register
• function vidioc_s_register
• function radio_g_tuner
• function radio_s_tuner
• function cx8800_vid_irq
• function cx8800_irq
• function cx8800_unregister_video
• function cx8800_initdev
• function cx8800_finidev
• function cx8800_suspend
• function cx8800_resume
• export cx88_video_mux
• export cx88_querycap
• export cx88_enum_input
• export cx88_set_freq

Annotated Snippet

static struct pci_driver cx8800_pci_driver = {
	.name      = "cx8800",
	.id_table  = cx8800_pci_tbl,
	.probe     = cx8800_initdev,
	.remove    = cx8800_finidev,
	.driver.pm = &cx8800_pm_ops,
};

module_pci_driver(cx8800_pci_driver);

Annotation

• Immediate include surface: `cx88.h`, `linux/init.h`, `linux/list.h`, `linux/module.h`, `linux/kmod.h`, `linux/kernel.h`, `linux/slab.h`, `linux/interrupt.h`.
• Detected declarations: `struct cx88_ctrl`, `function cx88_video_mux`, `function start_video_dma`, `function stop_video_dma`, `function restart_video_queue`, `function queue_setup`, `function buffer_prepare`, `function buffer_finish`, `function buffer_queue`, `function start_streaming`.
• Atlas domain: Driver Families / drivers/media.
• Implementation status: pattern 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.