Index: graphics/drm-fbsd13-kmod/files/patch-drm_fb_helper_freebsd.c
===================================================================
--- /dev/null
+++ graphics/drm-fbsd13-kmod/files/patch-drm_fb_helper_freebsd.c
@@ -0,0 +1,49 @@
+diff -ru drivers/gpu/drm/drm_fb_helper_freebsd.c drivers/gpu/drm/drm_fb_helper_freebsd.c
+--- drivers/gpu/drm/drm_fb_helper_freebsd.c	2022-04-26 02:24:02.000000000 -0600
++++ drivers/gpu/drm/drm_fb_helper_freebsd.c	2022-07-02 13:57:55.679647000 -0600
+@@ -48,7 +48,9 @@
+ int
+ fb_get_options(const char *connector_name, char **option)
+ {
++	int rotation;
+ 	char tunable[64];
++	char (*optbuf)[sizeof(",rotate=360")];
+ 
+ 	/*
+ 	 * A user may use loader tunables to set a specific mode for the
+@@ -62,15 +64,34 @@
+ 	 * Example of a mode applied to all connectors not having a
+ 	 * connector-specific mode:
+ 	 *     kern.vt.fb.default_mode="640x480"
++	 *
++	 * Example of a mode option applied to all connectors not having a
++	 * connector-specific mode, where the angle is the number of degrees
++	 * counter-clockwise to rotate the display:
++	 *     kern.vt.fb.default_mode=",rotate=270"
+ 	 */
+ 	snprintf(tunable, sizeof(tunable), "kern.vt.fb.modes.%s",
+ 	    connector_name);
+ 	DRM_INFO("Connector %s: get mode from tunables:\n", connector_name);
+ 	DRM_INFO("  - %s\n", tunable);
+ 	DRM_INFO("  - kern.vt.fb.default_mode\n");
++	DRM_INFO("  - screen.rotate\n");
+ 	*option = kern_getenv(tunable);
+ 	if (*option == NULL)
+-		*option = kern_getenv("kern.vt.fb.default_mode");
++	    *option = kern_getenv("kern.vt.fb.default_mode");
++	if (*option == NULL) {
++	    if (getenv_int("screen.rotate", &rotation) != 0) {
++		switch (rotation) {
++		case 90:
++		case 270:
++		    rotation = (rotation + 180) % 360;
++		case 180:
++		    optbuf = malloc(sizeof(*optbuf), DRM_MEM_DRIVER, M_WAITOK | M_ZERO);
++		    snprintf(*optbuf, sizeof(*optbuf), ",rotate=%d", rotation);
++		    *option = *optbuf;
++		}
++	    }
++	}
+ 
+ 	return (*option != NULL ? 0 : -ENOENT);
+ }
Index: graphics/drm-fbsd13-kmod/files/patch-linux_fb.c
===================================================================
--- /dev/null
+++ graphics/drm-fbsd13-kmod/files/patch-linux_fb.c
@@ -0,0 +1,38 @@
+diff -ur drivers/gpu/drm/linux_fb.c drivers/gpu/drm/linux_fb.c
+--- drivers/gpu/drm/linux_fb.c	2022-04-26 02:24:02.000000000 -0600
++++ drivers/gpu/drm/linux_fb.c	2022-06-30 23:12:04.654472000 -0600
+@@ -662,6 +662,34 @@
+ 	fb_info->fbio.fb_fbd_dev = device_add_child(fb_info->fb_bsddev, "fbd",
+ 				device_get_unit(fb_info->fb_bsddev));
+ 
++#ifdef __FreeBSD__
++#ifndef FB_FLAG_ROTATE_MASK	/* Transitional, from /sys/sys/fbio.h */
++#define FB_FLAG_ROTATE_0	    0x00	/* rotate fb 0 degrees clockwise */
++#define FB_FLAG_ROTATE_90	    0x08	/* rotate fb 90 degrees clockwise */
++#define FB_FLAG_ROTATE_180	    0x10	/* rotate fb 180 degrees clockwise */
++#define FB_FLAG_ROTATE_270	    (FB_FLAG_ROTATE_90 | FB_FLAG_ROTATE_180)
++#define FB_FLAG_ROTATE_MASK	    0x18
++#define FB_FLAG_ROTATE_NODEFAULT    0x20	/* do not load console defaults */
++#endif
++
++	/* Pass the FB_ROTATE hints to FreeBSD's vt(4) fb_flags. */
++	fb_info->fbio.fb_flags &= ~FB_FLAG_ROTATE_MASK;
++	switch (fb_info->fbcon_rotate_hint) {
++	case FB_ROTATE_UR:
++	    fb_info->fbio.fb_flags |= FB_FLAG_ROTATE_0 | FB_FLAG_ROTATE_NODEFAULT;
++	    break;
++	case FB_ROTATE_CW:
++	    fb_info->fbio.fb_flags |= FB_FLAG_ROTATE_90 | FB_FLAG_ROTATE_NODEFAULT;
++	    break;
++	case FB_ROTATE_UD:
++	    fb_info->fbio.fb_flags |= FB_FLAG_ROTATE_180 | FB_FLAG_ROTATE_NODEFAULT;
++	    break;
++	case FB_ROTATE_CCW:
++	    fb_info->fbio.fb_flags |= FB_FLAG_ROTATE_270 | FB_FLAG_ROTATE_NODEFAULT;
++	    break;
++	}
++#endif
++
+ 	/*
+ 	 * XXX we're deliberately not attaching because we already
+ 	 * do the equivalent albeit with less fanfare in fbd_init