drivers/gpu/drm/loongson/lsdc_drv.c

File Facts

System

Linux kernel

Corpus path

drivers/gpu/drm/loongson/lsdc_drv.c

Extension

.c

Size

10926 bytes

Lines

465

Domain

Driver Families

Bucket

drivers/gpu

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

Dependency Surface

• linux/aperture.h
• linux/pci.h
• linux/vgaarb.h
• drm/clients/drm_client_setup.h
• drm/drm_atomic.h
• drm/drm_atomic_helper.h
• drm/drm_drv.h
• drm/drm_fbdev_ttm.h
• drm/drm_gem_framebuffer_helper.h
• drm/drm_gem_ttm_helper.h
• drm/drm_ioctl.h
• drm/drm_modeset_helper.h
• drm/drm_print.h
• drm/drm_probe_helper.h
• drm/drm_vblank.h
• loongson_module.h
• lsdc_drv.h
• lsdc_gem.h
• lsdc_ttm.h

Detected Declarations

• function lsdc_modeset_init
• function lsdc_mode_config_init
• function lsdc_get_dedicated_vram
• function lsdc_create_device
• function lsdc_vga_set_decode
• function lsdc_pci_probe
• function lsdc_pci_remove
• function lsdc_pci_shutdown
• function lsdc_drm_freeze
• function lsdc_drm_resume
• function lsdc_pm_freeze
• function lsdc_pm_thaw
• function lsdc_pm_suspend
• function lsdc_pm_resume

Annotated Snippet

struct pci_driver lsdc_pci_driver = {
	.name = DRIVER_NAME,
	.id_table = lsdc_pciid_list,
	.probe = lsdc_pci_probe,
	.remove = lsdc_pci_remove,
	.shutdown = lsdc_pci_shutdown,
	.driver.pm = &lsdc_pm_ops,
};

MODULE_DEVICE_TABLE(pci, lsdc_pciid_list);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/aperture.h`, `linux/pci.h`, `linux/vgaarb.h`, `drm/clients/drm_client_setup.h`, `drm/drm_atomic.h`, `drm/drm_atomic_helper.h`, `drm/drm_drv.h`, `drm/drm_fbdev_ttm.h`.
• Detected declarations: `function lsdc_modeset_init`, `function lsdc_mode_config_init`, `function lsdc_get_dedicated_vram`, `function lsdc_create_device`, `function lsdc_vga_set_decode`, `function lsdc_pci_probe`, `function lsdc_pci_remove`, `function lsdc_pci_shutdown`, `function lsdc_drm_freeze`, `function lsdc_drm_resume`.
• Atlas domain: Driver Families / drivers/gpu.
• 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.