Crate drmkit_core 

Core DRM/KMS device access for drmkit.

Port of src/core/ plus src/modeset/atomic.{hpp,cpp} from drm-cxx @ dc2915b.

The main pieces:

• Device — an open DRM node, owning or borrowing its descriptor.
• PropertyStore — a per-object property cache, so building a frame’s atomic request is hash-map lookups rather than an ioctl per property.
• AtomicRequest — accumulated property writes, testable and committable.

Relationship to the drm crate

Per DR-2 drmkit wraps the Smithay drm crate and never re-binds the ioctls. Device implements drm::Device and drm::control::Device, so the whole KMS surface those traits expose is available directly. What this crate adds is the parts the C++ gives a different contract: descriptor ownership, the property cache, and the atomic request’s export seam.

Example

use drmkit_core::{AtomicRequest, Device, ObjectType, PropertyStore};
use drm::control::AtomicCommitFlags;

let device = Device::open("/dev/dri/card0")?;
device.enable_universal_planes()?;
device.enable_atomic()?;

let mut props = PropertyStore::new();
props.cache_properties(&device, 31, ObjectType::Plane)?;

let mut request = AtomicRequest::new();
request.add_property(31, props.property_id(31, "FB_ID")?, 42)?;

request.test(&device, AtomicCommitFlags::empty())?;

Structs

AtomicCommitFlags

Commit flags for atomic mode setting

AtomicRequest

An atomic modeset request under construction.

Device

An open DRM device.

Mode

Resolution and timing information for a display mode.

PropertyBlob

A kernel property blob, freed when it is dropped.

PropertyInfo

One cached property.

PropertyStore

Per-object property cache.

PropertyWrite

One accumulated (object, property, value) write.

Enums

ClientCapability

Used to enable/disable capabilities for the process.

CoreError

Errors from device, property, and atomic-request operations.

ObjectType

A DRM object kind, for property queries.

Functions

commit_with_out_fence

Commit build’s request and collect the CRTC’s out-fence.

crtc_sequence

The CRTC’s current vblank sequence.

event_pending

Whether an event – a page-flip completion, a vblank – is queued on the device, without reading it.

framebuffer_modifier

The modifier to declare when registering a framebuffer, or None to take the legacy path, which leaves the layout to the driver.

supports_framebuffer_modifiers

Whether the driver accepts DRM_MODE_FB_MODIFIERS (DRM_CAP_ADDFB2_MODIFIERS).

Type Aliases

Result

Convenience alias.