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/* SPDX-License-Identifier: MIT */
/* Copyright © 2025 Intel Corporation */
#ifndef __DRM_INTEL_DISPLAY_H__
#define __DRM_INTEL_DISPLAY_H__
#include <linux/build_bug.h>
#include <linux/stddef.h>
#include <linux/stringify.h>
#include <drm/drm_device.h>
struct intel_display;
/*
* A dummy device struct to define the relative offsets of drm and display
* members. With the members identically placed in struct drm_i915_private and
* struct xe_device, this allows figuring out the struct intel_display pointer
* without the definition of either driver specific structure.
*/
struct __intel_generic_device {
struct drm_device drm;
struct intel_display *display;
};
/**
* INTEL_DISPLAY_MEMBER_STATIC_ASSERT() - ensure correct placing of drm and display members
* @type: The struct to check
* @drm_member: Name of the struct drm_device member
* @display_member: Name of the struct intel_display * member.
*
* Use this static assert macro to ensure the struct drm_i915_private and struct
* xe_device struct drm_device and struct intel_display * members are at the
* same relative offsets.
*/
#define INTEL_DISPLAY_MEMBER_STATIC_ASSERT(type, drm_member, display_member) \
static_assert( \
offsetof(struct __intel_generic_device, display) - offsetof(struct __intel_generic_device, drm) == \
offsetof(type, display_member) - offsetof(type, drm_member), \
__stringify(type) " " __stringify(drm_member) " and " __stringify(display_member) " members at invalid offsets")
#endif
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