mirror of https://github.com/torvalds/linux.git
43 lines
1.5 KiB
C
43 lines
1.5 KiB
C
/* 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
|