drivers/gpu/drm/i915/display/intel_display_snapshot.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/i915/display/intel_display_snapshot.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/i915/display/intel_display_snapshot.c
Extension
.c
Size
1906 bytes
Lines
76
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: implementation source
Status
source 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.

Dependency Surface

Detected Declarations

Annotated Snippet

struct intel_display_snapshot {
	struct intel_display *display;

	struct intel_display_device_info info;
	struct intel_display_runtime_info runtime_info;
	struct intel_display_params params;
	struct intel_dmc_snapshot *dmc;
	struct intel_display_irq_snapshot *irq;
};

struct intel_display_snapshot *intel_display_snapshot_capture(struct intel_display *display)
{
	struct intel_display_snapshot *snapshot;

	snapshot = kzalloc_obj(*snapshot, GFP_ATOMIC);
	if (!snapshot)
		return NULL;

	snapshot->display = display;

	memcpy(&snapshot->info, DISPLAY_INFO(display), sizeof(snapshot->info));
	memcpy(&snapshot->runtime_info, DISPLAY_RUNTIME_INFO(display),
	       sizeof(snapshot->runtime_info));

	intel_display_params_copy(&snapshot->params);

	snapshot->irq = intel_display_irq_snapshot_capture(display);
	snapshot->dmc = intel_dmc_snapshot_capture(display);

	return snapshot;
}

void intel_display_snapshot_print(const struct intel_display_snapshot *snapshot,
				  struct drm_printer *p)
{
	struct intel_display *display;

	if (!snapshot)
		return;

	display = snapshot->display;

	intel_display_device_info_print(&snapshot->info, &snapshot->runtime_info, p);
	intel_display_params_dump(&snapshot->params, display->drm->driver->name, p);

	intel_display_irq_snapshot_print(snapshot->irq, p);
	intel_dmc_snapshot_print(snapshot->dmc, p);
}

void intel_display_snapshot_free(struct intel_display_snapshot *snapshot)
{
	if (!snapshot)
		return;

	intel_display_params_free(&snapshot->params);

	kfree(snapshot->irq);
	kfree(snapshot->dmc);
	kfree(snapshot);
}

Annotation

Implementation Notes