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

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

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/i915/display/intel_display_utils.c
Extension
.c
Size
681 bytes
Lines
33
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

// SPDX-License-Identifier: MIT
/* Copyright © 2025 Intel Corporation */

#include <linux/device.h>

#include <drm/drm_device.h>

#ifdef CONFIG_X86
#include <asm/hypervisor.h>
#endif

#include "intel_display_core.h"
#include "intel_display_utils.h"

bool intel_display_run_as_guest(struct intel_display *display)
{
#if IS_ENABLED(CONFIG_X86)
	return !hypervisor_is_type(X86_HYPER_NATIVE);
#else
	/* Not supported yet */
	return false;
#endif
}

bool intel_display_vtd_active(struct intel_display *display)
{
	if (device_iommu_mapped(display->drm->dev))
		return true;

	/* Running as a guest, we assume the host is enforcing VT'd */
	return intel_display_run_as_guest(display);
}

Annotation

Implementation Notes