drivers/gpu/drm/ast/ast_drv.c

File Facts

System

Linux kernel

Corpus path

drivers/gpu/drm/ast/ast_drv.c

Extension

.c

Size

14732 bytes

Lines

617

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

Dependency Surface

• linux/aperture.h
• linux/module.h
• linux/of.h
• linux/pci.h
• drm/clients/drm_client_setup.h
• drm/drm_atomic_helper.h
• drm/drm_drv.h
• drm/drm_fbdev_shmem.h
• drm/drm_gem_shmem_helper.h
• drm/drm_module.h
• drm/drm_print.h
• drm/drm_probe_helper.h
• ast_drv.h

Detected Declarations

• function __ast_selseg
• function __ast_rdseg32
• function __ast_wrseg32
• function __ast_mindwm
• function __ast_moutdwm
• function ast_mindwm
• function ast_moutdwm
• function ast_moutdwm_poll
• function ast_device_init
• function __ast_device_set_tx_chip
• function ast_is_vga_enabled
• function ast_enable_vga
• function ast_enable_mmio_release
• function ast_enable_mmio
• function ast_open_key
• function ast_detect_chip
• function ast_pci_probe
• function ast_pci_remove
• function ast_pci_shutdown
• function ast_drm_freeze
• function ast_drm_thaw
• function ast_drm_resume
• function ast_pm_suspend
• function ast_pm_resume
• function ast_pm_freeze
• function ast_pm_thaw
• function ast_pm_poweroff

Annotated Snippet

static struct pci_driver ast_pci_driver = {
	.name = DRIVER_NAME,
	.id_table = ast_pciidlist,
	.probe = ast_pci_probe,
	.remove = ast_pci_remove,
	.shutdown = ast_pci_shutdown,
	.driver.pm = &ast_pm_ops,
};

drm_module_pci_driver_if_modeset(ast_pci_driver, ast_modeset);

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL and additional rights");

Annotation

• Immediate include surface: `linux/aperture.h`, `linux/module.h`, `linux/of.h`, `linux/pci.h`, `drm/clients/drm_client_setup.h`, `drm/drm_atomic_helper.h`, `drm/drm_drv.h`, `drm/drm_fbdev_shmem.h`.
• Detected declarations: `function __ast_selseg`, `function __ast_rdseg32`, `function __ast_wrseg32`, `function __ast_mindwm`, `function __ast_moutdwm`, `function ast_mindwm`, `function ast_moutdwm`, `function ast_moutdwm_poll`, `function ast_device_init`, `function __ast_device_set_tx_chip`.
• 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.

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.