drivers/video/fbdev/geode/gx1fb_core.c

File Facts

System

Linux kernel

Corpus path

drivers/video/fbdev/geode/gx1fb_core.c

Extension

.c

Size

12281 bytes

Lines

479

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/module.h
• linux/kernel.h
• linux/errno.h
• linux/string.h
• linux/mm.h
• linux/delay.h
• linux/fb.h
• linux/init.h
• linux/pci.h
• geodefb.h
• display_gx1.h
• video_cs5530.h

Detected Declarations

• function gx1_line_delta
• function gx1fb_check_var
• function gx1fb_set_par
• function chan_to_field
• function gx1fb_setcolreg
• function gx1fb_blank
• function gx1fb_map_video_memory
• function parse_panel_option
• function gx1fb_probe
• function gx1fb_remove
• function gx1fb_setup
• function gx1fb_init
• function gx1fb_cleanup
• module init gx1fb_init

Annotated Snippet

static struct pci_driver gx1fb_driver = {
	.name		= "gx1fb",
	.id_table	= gx1fb_id_table,
	.probe		= gx1fb_probe,
	.remove		= gx1fb_remove,
};

static int __init gx1fb_init(void)
{
#ifndef MODULE
	char *option = NULL;
#endif

	if (fb_modesetting_disabled("gx1fb"))
		return -ENODEV;

#ifndef MODULE
	if (fb_get_options("gx1fb", &option))
		return -ENODEV;
	gx1fb_setup(option);
#endif
	return pci_register_driver(&gx1fb_driver);
}

static void gx1fb_cleanup(void)
{
	pci_unregister_driver(&gx1fb_driver);
}

module_init(gx1fb_init);
module_exit(gx1fb_cleanup);

module_param_string(mode, mode_option, sizeof(mode_option), 0444);
MODULE_PARM_DESC(mode, "video mode (<x>x<y>[-<bpp>][@<refr>])");

module_param_named(crt, crt_option, int, 0444);
MODULE_PARM_DESC(crt, "enable CRT output. 0 = off, 1 = on (default)");

module_param_string(panel, panel_option, sizeof(panel_option), 0444);
MODULE_PARM_DESC(panel, "size of attached flat panel (<x>x<y>)");

MODULE_DESCRIPTION("framebuffer driver for the AMD Geode GX1");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/aperture.h`, `linux/module.h`, `linux/kernel.h`, `linux/errno.h`, `linux/string.h`, `linux/mm.h`, `linux/delay.h`, `linux/fb.h`.
• Detected declarations: `function gx1_line_delta`, `function gx1fb_check_var`, `function gx1fb_set_par`, `function chan_to_field`, `function gx1fb_setcolreg`, `function gx1fb_blank`, `function gx1fb_map_video_memory`, `function parse_panel_option`, `function gx1fb_probe`, `function gx1fb_remove`.
• 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.