drivers/video/fbdev/gxt4500.c

File Facts

System

Linux kernel

Corpus path

drivers/video/fbdev/gxt4500.c

Extension

.c

Size

22375 bytes

Lines

802

Domain

Driver Families

Bucket

drivers/video

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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/aperture.h
• linux/kernel.h
• linux/module.h
• linux/fb.h
• linux/console.h
• linux/pci.h
• linux/pci_ids.h
• linux/delay.h
• linux/string.h

Detected Declarations

• struct gxt4500_par
• enum gxt_cards
• function calc_pll
• function calc_pixclock
• function gxt4500_var_to_par
• function gxt4500_unpack_pixfmt
• function gxt4500_check_var
• function gxt4500_set_par
• function gxt4500_setcolreg
• function gxt4500_pan_display
• function gxt4500_blank
• function gxt4500_probe
• function gxt4500_remove
• function gxt4500_init
• function gxt4500_exit
• module init gxt4500_init

Annotated Snippet

static struct pci_driver gxt4500_driver = {
	.name = "gxt4500",
	.id_table = gxt4500_pci_tbl,
	.probe = gxt4500_probe,
	.remove = gxt4500_remove,
};

static int gxt4500_init(void)
{
	if (fb_modesetting_disabled("gxt4500"))
		return -ENODEV;

#ifndef MODULE
	if (fb_get_options("gxt4500", &mode_option))
		return -ENODEV;
#endif

	return pci_register_driver(&gxt4500_driver);
}
module_init(gxt4500_init);

static void __exit gxt4500_exit(void)
{
	pci_unregister_driver(&gxt4500_driver);
}
module_exit(gxt4500_exit);

MODULE_AUTHOR("Paul Mackerras <paulus@samba.org>");
MODULE_DESCRIPTION("FBDev driver for IBM GXT4500P/6500P and GXT4000P/6000P");
MODULE_LICENSE("GPL");
module_param(mode_option, charp, 0);
MODULE_PARM_DESC(mode_option, "Specify resolution as \"<xres>x<yres>[-<bpp>][@<refresh>]\"");

Annotation

• Immediate include surface: `linux/aperture.h`, `linux/kernel.h`, `linux/module.h`, `linux/fb.h`, `linux/console.h`, `linux/pci.h`, `linux/pci_ids.h`, `linux/delay.h`.
• Detected declarations: `struct gxt4500_par`, `enum gxt_cards`, `function calc_pll`, `function calc_pixclock`, `function gxt4500_var_to_par`, `function gxt4500_unpack_pixfmt`, `function gxt4500_check_var`, `function gxt4500_set_par`, `function gxt4500_setcolreg`, `function gxt4500_pan_display`.
• Atlas domain: Driver Families / drivers/video.
• Implementation status: pattern 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.