drivers/gpu/drm/amd/amdgpu/amdgpu_securedisplay.c

File Facts

System

Linux kernel

Corpus path

drivers/gpu/drm/amd/amdgpu/amdgpu_securedisplay.c

Extension

.c

Size

6494 bytes

Lines

198

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/debugfs.h
• linux/pm_runtime.h
• amdgpu.h
• amdgpu_securedisplay.h

Detected Declarations

• function files
• function psp_prep_securedisplay_cmd_buf
• function amdgpu_securedisplay_debugfs_write
• function amdgpu_securedisplay_debugfs_init

Annotated Snippet

static const struct file_operations amdgpu_securedisplay_debugfs_ops = {
	.owner = THIS_MODULE,
	.read = NULL,
	.write = amdgpu_securedisplay_debugfs_write,
	.llseek = default_llseek
};

#endif

void amdgpu_securedisplay_debugfs_init(struct amdgpu_device *adev)
{
#if defined(CONFIG_DEBUG_FS)

	if (!adev->psp.securedisplay_context.context.initialized)
		return;

	debugfs_create_file("securedisplay_test", S_IWUSR, adev_to_drm(adev)->primary->debugfs_root,
				adev, &amdgpu_securedisplay_debugfs_ops);
#endif
}

Annotation

• Immediate include surface: `linux/debugfs.h`, `linux/pm_runtime.h`, `amdgpu.h`, `amdgpu_securedisplay.h`.
• Detected declarations: `function files`, `function psp_prep_securedisplay_cmd_buf`, `function amdgpu_securedisplay_debugfs_write`, `function amdgpu_securedisplay_debugfs_init`.
• 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.