sound/hda/controllers/intel.c

File Facts

System

Linux kernel

Corpus path

sound/hda/controllers/intel.c

Extension

.c

Size

86510 bytes

Lines

2856

Domain

Driver Families

Bucket

sound/hda

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.
• 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/delay.h
• linux/interrupt.h
• linux/kernel.h
• linux/module.h
• linux/dma-mapping.h
• linux/moduleparam.h
• linux/init.h
• linux/slab.h
• linux/pci.h
• linux/mutex.h
• linux/io.h
• linux/pm_runtime.h
• linux/clocksource.h
• linux/time.h
• linux/completion.h
• linux/acpi.h
• linux/pgtable.h
• linux/dmi.h
• asm/set_memory.h
• asm/cpufeature.h
• sound/core.h
• sound/initval.h
• sound/hdaudio.h
• sound/hda_i915.h
• sound/intel-dsp-config.h
• linux/vgaarb.h
• linux/vga_switcheroo.h
• linux/apple-gmux.h
• linux/firmware.h
• sound/hda_codec.h
• intel.h
• intel_trace.h

Detected Declarations

• function update_pci_byte
• function azx_init_pci
• function bxt_reduce_dma_latency
• function intel_get_lctl_scf
• function intel_ml_lctl_set_power
• function intel_init_lctl
• function hda_intel_init_chip
• function azx_get_delay_from_lpib
• function azx_position_check
• function azx_position_ok
• function azx_irq_pending_work
• function scoped_guard
• function hda_intel_stream_clear_irq_pending
• function hda_intel_pcm_close
• function azx_clear_irq_pending
• function list_for_each_entry
• function azx_acquire_irq
• function azx_via_get_position
• function azx_get_pos_fifo
• function azx_get_delay_from_fifo
• function __azx_shutdown_chip
• function azx_shutdown_chip
• function azx_add_card_list
• function azx_del_card_list
• function param_set_xint
• function azx_is_pm_ready
• function __azx_runtime_resume
• function list_for_each_codec
• function azx_prepare
• function azx_complete
• function azx_suspend
• function azx_resume
• function azx_freeze_noirq
• function azx_thaw_noirq
• function azx_runtime_suspend
• function azx_runtime_resume
• function azx_runtime_idle
• function azx_vs_set_state
• function list_for_each_codec
• function azx_vs_can_switch
• function setup_vga_switcheroo_runtime_pm
• function azx_vs_gpu_bound
• function init_vga_switcheroo
• function register_vga_switcheroo
• function azx_free
• function azx_dev_disconnect
• function azx_dev_free
• function atpx_present

Annotated Snippet

static struct pci_driver azx_driver = {
	.name = KBUILD_MODNAME,
	.id_table = azx_ids,
	.probe = azx_probe,
	.remove = azx_remove,
	.shutdown = azx_shutdown,
	.driver = {
		.pm = pm_ptr(&azx_pm),
	},
};

module_pci_driver(azx_driver);

Annotation

• Immediate include surface: `linux/delay.h`, `linux/interrupt.h`, `linux/kernel.h`, `linux/module.h`, `linux/dma-mapping.h`, `linux/moduleparam.h`, `linux/init.h`, `linux/slab.h`.
• Detected declarations: `function update_pci_byte`, `function azx_init_pci`, `function bxt_reduce_dma_latency`, `function intel_get_lctl_scf`, `function intel_ml_lctl_set_power`, `function intel_init_lctl`, `function hda_intel_init_chip`, `function azx_get_delay_from_lpib`, `function azx_position_check`, `function azx_position_ok`.
• Atlas domain: Driver Families / sound/hda.
• Implementation status: pattern implementation candidate.
• 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.