drivers/video/fbdev/mmp/hw/mmp_ctrl.c

File Facts

System

Linux kernel

Corpus path

drivers/video/fbdev/mmp/hw/mmp_ctrl.c

Extension

.c

Size

15161 bytes

Lines

578

Domain

Driver Families

Bucket

drivers/video

Inferred role

Driver Families: exported/initcall integration point

Status

integration 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.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• 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/module.h
• linux/moduleparam.h
• linux/kernel.h
• linux/errno.h
• linux/string.h
• linux/interrupt.h
• linux/slab.h
• linux/delay.h
• linux/platform_device.h
• linux/dma-mapping.h
• linux/clk.h
• linux/err.h
• linux/vmalloc.h
• linux/uaccess.h
• linux/kthread.h
• linux/io.h
• mmp_ctrl.h

Detected Declarations

• function Copyright
• function fmt_to_reg
• function dmafetch_set_fmt
• function overlay_set_win
• function dmafetch_onoff
• function path_enabledisable
• function path_onoff
• function overlay_set_onoff
• function overlay_set_fetch
• function overlay_set_addr
• function path_set_mode
• function ctrl_set_default
• function path_set_default
• function path_init
• function path_deinit
• function mmphw_probe
• function resource_size
• function mmphw_init
• module init mmphw_init

Annotated Snippet

module_init(mmphw_init);

MODULE_AUTHOR("Li Guoqing<ligq@marvell.com>");
MODULE_DESCRIPTION("Framebuffer driver for mmp");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/module.h`, `linux/moduleparam.h`, `linux/kernel.h`, `linux/errno.h`, `linux/string.h`, `linux/interrupt.h`, `linux/slab.h`, `linux/delay.h`.
• Detected declarations: `function Copyright`, `function fmt_to_reg`, `function dmafetch_set_fmt`, `function overlay_set_win`, `function dmafetch_onoff`, `function path_enabledisable`, `function path_onoff`, `function overlay_set_onoff`, `function overlay_set_fetch`, `function overlay_set_addr`.
• Atlas domain: Driver Families / drivers/video.
• Implementation status: integration 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.