AC_DEFUN([AC_AMDGPU_DRM_CRTC_HELPER], [
	dnl #
	dnl # commit f453ba0460742ad027ae0c4c7d61e62817b3e7ef
	dnl # DRM: add mode setting support
	dnl #
	dnl # commit c2d88e06bcb98540bb83fac874574eaa4f320363
	dnl # drm: Move the legacy kms disable_all helper to crtc helpers
	dnl #
	AC_MSG_CHECKING([whether drm_helper_force_disable_all() is available])
	AC_KERNEL_TRY_COMPILE([
		#include <drm/drm_crtc_helper.h>
	], [
		drm_helper_force_disable_all(NULL);
	], [
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_DRM_HELPER_FORCE_DISABLE_ALL, 1, [
			drm_helper_force_disable_all() is available
		])
	], [
		AC_MSG_RESULT(no)
	])
])