diff --git a/graphics/Makefile b/graphics/Makefile
--- a/graphics/Makefile
+++ b/graphics/Makefile
@@ -631,6 +631,7 @@
     SUBDIR += nvidia-drm-510-kmod
     SUBDIR += nvidia-drm-515-kmod
     SUBDIR += nvidia-drm-61-kmod
+    SUBDIR += nvidia-drm-66-kmod
     SUBDIR += nvidia-drm-kmod
     SUBDIR += nvidia-texture-tools
     SUBDIR += ocaml-cairo
diff --git a/graphics/nvidia-drm-510-kmod/Makefile b/graphics/nvidia-drm-510-kmod/Makefile
--- a/graphics/nvidia-drm-510-kmod/Makefile
+++ b/graphics/nvidia-drm-510-kmod/Makefile
@@ -3,7 +3,7 @@
 
 BUILD_DEPENDS+=	${KMODDIR}/drm.ko:graphics/drm-510-kmod
 RUN_DEPENDS+=	${KMODDIR}/drm.ko:graphics/drm-510-kmod
-CONFLICTS_INSTALL=	nvidia-drm-515-kmod nvidia-drm-61-kmod
+CONFLICTS_INSTALL=	nvidia-drm-510-kmod nvidia-drm-61-kmod nvidia-drm-66-kmod
 
 .include "${.CURDIR}/../drm-510-kmod/Makefile.version"
 .include "${.CURDIR}/../nvidia-drm-kmod/Makefile.common"
diff --git a/graphics/nvidia-drm-515-kmod/Makefile b/graphics/nvidia-drm-515-kmod/Makefile
--- a/graphics/nvidia-drm-515-kmod/Makefile
+++ b/graphics/nvidia-drm-515-kmod/Makefile
@@ -4,7 +4,7 @@
 
 BUILD_DEPENDS+=	${KMODDIR}/drm.ko:graphics/drm-515-kmod
 RUN_DEPENDS+=	${KMODDIR}/drm.ko:graphics/drm-515-kmod
-CONFLICTS_INSTALL=	nvidia-drm-510-kmod nvidia-drm-61-kmod
+CONFLICTS_INSTALL=	nvidia-drm-510-kmod nvidia-drm-61-kmod nvidia-drm-66-kmod
 
 .include "${.CURDIR}/../drm-515-kmod/Makefile.version"
 .include "${.CURDIR}/../nvidia-drm-kmod/Makefile.common"
diff --git a/graphics/nvidia-drm-61-kmod/Makefile b/graphics/nvidia-drm-61-kmod/Makefile
--- a/graphics/nvidia-drm-61-kmod/Makefile
+++ b/graphics/nvidia-drm-61-kmod/Makefile
@@ -3,7 +3,7 @@
 
 BUILD_DEPENDS+=	${KMODDIR}/drm.ko:graphics/drm-61-kmod
 RUN_DEPENDS+=	${KMODDIR}/drm.ko:graphics/drm-61-kmod
-CONFLICTS_INSTALL=	nvidia-drm-510-kmod nvidia-drm-515-kmod
+CONFLICTS_INSTALL=	nvidia-drm-510-kmod nvidia-drm-515-kmod nvidia-drm-66-kmod
 
 .include "${.CURDIR}/../drm-61-kmod/Makefile.version"
 .include "${.CURDIR}/../nvidia-drm-kmod/Makefile.common"
diff --git a/graphics/nvidia-drm-66-kmod/Makefile b/graphics/nvidia-drm-66-kmod/Makefile
new file mode 100644
--- /dev/null
+++ b/graphics/nvidia-drm-66-kmod/Makefile
@@ -0,0 +1,11 @@
+PORTNAME=	nvidia-drm-66-kmod
+CATEGORIES=	graphics
+
+BUILD_DEPENDS+=	${KMODDIR}/drm.ko:graphics/drm-66-kmod
+RUN_DEPENDS+=	${KMODDIR}/drm.ko:graphics/drm-66-kmod
+CONFLICTS_INSTALL=	nvidia-drm-510-kmod nvidia-drm-515-kmod nvidia-drm-61-kmod
+
+.include "${.CURDIR}/../drm-66-kmod/Makefile.version"
+.include "${.CURDIR}/../nvidia-drm-kmod/Makefile.common"
+
+.include <bsd.port.mk>
diff --git a/graphics/nvidia-drm-66-kmod/distinfo b/graphics/nvidia-drm-66-kmod/distinfo
new file mode 100644
--- /dev/null
+++ b/graphics/nvidia-drm-66-kmod/distinfo
@@ -0,0 +1,5 @@
+TIMESTAMP = 1739992459
+SHA256 (NVIDIA-FreeBSD-x86_64-550.127.05.tar.xz) = 74557d328ad74f604599ee2df3d42defc86ebe231e7cbe99c860f928f16a0bc3
+SIZE (NVIDIA-FreeBSD-x86_64-550.127.05.tar.xz) = 143641432
+SHA256 (freebsd-drm-kmod-drm_v6.6.25_1_GH0.tar.gz) = 9de65da6907e2b61b09e9836e923b48dc029e68e2cb4521c17df75f3529fa640
+SIZE (freebsd-drm-kmod-drm_v6.6.25_1_GH0.tar.gz) = 38488410
diff --git a/graphics/nvidia-drm-66-kmod/files/20-nvidia-drm-outputclass.conf.in b/graphics/nvidia-drm-66-kmod/files/20-nvidia-drm-outputclass.conf.in
new file mode 100644
--- /dev/null
+++ b/graphics/nvidia-drm-66-kmod/files/20-nvidia-drm-outputclass.conf.in
@@ -0,0 +1,8 @@
+Section "OutputClass"
+    Identifier "nvidia"
+    MatchDriver "nvidia-drm"
+    Driver "nvidia"
+    Option "PrimaryGPU" "yes"
+    ModulePath "%%LOCALBASE%%/lib/nvidia/xorg"
+    ModulePath "%%LOCALBASE%%/lib/xorg/modules"
+EndSection
diff --git a/graphics/nvidia-drm-66-kmod/files/extra-patch-nvidia-drm-conftest.h b/graphics/nvidia-drm-66-kmod/files/extra-patch-nvidia-drm-conftest.h
new file mode 100644
--- /dev/null
+++ b/graphics/nvidia-drm-66-kmod/files/extra-patch-nvidia-drm-conftest.h
@@ -0,0 +1,14 @@
+--- nvidia-drm-conftest.h.orig	2024-02-22 01:03:15 UTC
++++ nvidia-drm-conftest.h
+@@ -85,7 +85,11 @@
+ 
+ /* For nv_drm_gem_prime_force_fence_signal */
+ #ifndef spin_is_locked
++#if ((__FreeBSD_version >= 1500000) && (__FreeBSD_version < 1500018)) || (__FreeBSD_version < 1401501)
+ #define spin_is_locked(lock) mtx_owned(lock.m)
++#else
++#define spin_is_locked(lock) mtx_owned(lock)
++#endif
+ #endif
+ 
+ #ifndef rwsem_is_locked
diff --git a/graphics/nvidia-drm-66-kmod/files/extra-patch-nvidia-drm-freebsd-lkpi.c b/graphics/nvidia-drm-66-kmod/files/extra-patch-nvidia-drm-freebsd-lkpi.c
new file mode 100644
--- /dev/null
+++ b/graphics/nvidia-drm-66-kmod/files/extra-patch-nvidia-drm-freebsd-lkpi.c
@@ -0,0 +1,54 @@
+--- nvidia-drm-freebsd-lkpi.c.orig	2024-02-22 01:03:15 UTC
++++ nvidia-drm-freebsd-lkpi.c
+@@ -115,6 +115,7 @@ int nv_drm_probe_devices(void)
+      * by the native nvidia.ko by using our devclass.
+      */
+     for (int i = 0; i < NV_MAX_DEVICES; i++) {
++        struct pci_dev *pdev;
+         nv_gpu_info_t gpu_info;
+         struct nvidia_softc *sc = devclass_get_softc(nvidia_devclass, i);
+         if (!sc) {
+@@ -124,11 +125,33 @@ int nv_drm_probe_devices(void)
+         nv_state_t *nv = sc->nv_state;
+ 
+         /*
++         * Set the ivars for this device if they are not already populated. This
++         * is the bus specific data, and linuxkpi will try to use it.
++         */
++        if (!device_get_ivars(sc->dev)) {
++            device_t parent = device_get_parent(sc->dev);
++            struct pci_devinfo *dinfo = device_get_ivars(parent);
++            device_set_ivars(sc->dev, dinfo);
++        }
++
++        /*
+          * Now we have the state (which gives us the device_t), but what nvidia-drm
+          * wants is a pci_dev suitable for use with linuxkpi code. We can use
+-         * lkpinew_pci_dev to fill in a pci_dev struct,
++         * lkpinew_pci_dev to fill in a pci_dev struct, or linux_pci_attach on more
++         * recent kernels (introduced by 253dbe7487705).
+          */
+-        struct pci_dev *pdev = lkpinew_pci_dev(sc->dev);
++#if __FreeBSD_version < 1300093
++        pdev = lkpinew_pci_dev(sc->dev);
++#else
++        pdev = malloc(sizeof(*pdev), M_DEVBUF, M_WAITOK|M_ZERO);
++        if (!pdev) {
++            return -ENOMEM;
++        }
++
++        if (linux_pci_attach_device(sc->dev, NULL, NULL, pdev)) {
++            return -ENOMEM;
++        }
++#endif
+         nv_lkpi_pci_devs[i] = pdev;
+ 
+         gpu_info.gpu_id = nv->gpu_id;
+@@ -148,7 +171,6 @@ MODULE_DEPEND(nvidia_drm, linuxkpi, 1, 1, 1);
+ LKPI_DRIVER_MODULE(nvidia_drm, nv_drm_init, nv_drm_exit);
+ LKPI_PNP_INFO(pci, nvidia_drm, nv_module_device_table);
+ MODULE_DEPEND(nvidia_drm, linuxkpi, 1, 1, 1);
+-MODULE_DEPEND(nvidia_drm, linuxkpi_gplv2, 1, 1, 1);
+ MODULE_DEPEND(nvidia_drm, drmn, 2, 2, 2);
+ MODULE_DEPEND(nvidia_drm, dmabuf, 1, 1, 1);
+ MODULE_DEPEND(nvidia_drm, nvidia, 1, 1, 1);
diff --git a/graphics/nvidia-drm-66-kmod/pkg-descr b/graphics/nvidia-drm-66-kmod/pkg-descr
new file mode 100644
--- /dev/null
+++ b/graphics/nvidia-drm-66-kmod/pkg-descr
@@ -0,0 +1,3 @@
+FreeBSD port of Linux's nvidia-drm.ko Kernel module.
+
+This version is compatible with drm.ko 6.6.
diff --git a/graphics/nvidia-drm-66-kmod/pkg-message b/graphics/nvidia-drm-66-kmod/pkg-message
new file mode 100644
--- /dev/null
+++ b/graphics/nvidia-drm-66-kmod/pkg-message
@@ -0,0 +1,8 @@
+Modesetting must be enabled to use nvidia-drm.ko for graphics. This can be done
+by setting the modeset sysctl, the equivalent of the modeset kernel parameter
+on Linux.
+
+hw.nvidiadrm.modeset=1
+
+This must be set before loading nvdidia-drm.ko, most easily done by placing the
+above in /boot/loader.conf.