Index: dev/fdt/simplefb.c
===================================================================
RCS file: /home/netbsd/src/sys/dev/fdt/simplefb.c,v
retrieving revision 1.8
diff -p -u -r1.8 simplefb.c
--- dev/fdt/simplefb.c	23 Jul 2019 14:34:12 -0000	1.8
+++ dev/fdt/simplefb.c	17 Oct 2020 17:34:02 -0000
@@ -181,6 +181,10 @@ simplefb_attach_genfb(struct simplefb_so
 	prop_dictionary_set_uint64(dict, "virtual_address",
 	    (uintptr_t)bus_space_vaddr(sc->sc_bst, sc->sc_bsh));
 
+#if defined(__ARMEB__) || defined(__AARCH64EB__)
+	prop_dictionary_set_bool(dict, "is_swapped", true);
+#endif
+
 	genfb_init(&sc->sc_gen);
 
 	if (sc->sc_gen.sc_width == 0 || sc->sc_gen.sc_fbsize == 0) {
Index: dev/wsfb/genfb.c
===================================================================
RCS file: /home/netbsd/src/sys/dev/wsfb/genfb.c,v
retrieving revision 1.76
diff -p -u -r1.76 genfb.c
--- dev/wsfb/genfb.c	18 Oct 2020 12:00:12 -0000	1.76
+++ dev/wsfb/genfb.c	18 Oct 2020 12:39:26 -0000
@@ -544,7 +539,7 @@ genfb_init_screen(void *cookie, struct v
 	struct genfb_softc *sc = cookie;
 	struct rasops_info *ri = &scr->scr_ri;
 	int wantcols;
-	bool is_bgr;
+	bool is_bgr, is_swapped;
 
 	ri->ri_depth = sc->sc_depth;
 	ri->ri_width = sc->sc_width;
@@ -571,23 +566,27 @@ genfb_init_screen(void *cookie, struct v
 	case 32:
 	case 24:
 		ri->ri_flg |= RI_ENABLE_ALPHA;
+		ri->ri_rnum = 8;
+		ri->ri_gnum = 8;
+		ri->ri_bnum = 8;
 
 		is_bgr = false;
 		prop_dictionary_get_bool(device_properties(sc->sc_dev),
 		    "is_bgr", &is_bgr);
+		is_swapped = false;
+		prop_dictionary_get_bool(device_properties(sc->sc_dev),
+		    "is_swapped", &is_swapped);
 		if (is_bgr) {
 			/* someone requested BGR */
-			ri->ri_rnum = 8;
-			ri->ri_gnum = 8;
-			ri->ri_bnum = 8;
 			ri->ri_rpos = 0;
 			ri->ri_gpos = 8;
 			ri->ri_bpos = 16;
+		} else if (ri->ri_depth == 32 && is_swapped) {
+			ri->ri_rpos = 8;
+			ri->ri_gpos = 16;
+			ri->ri_bpos = 24;
 		} else {
 			/* assume RGB */
-			ri->ri_rnum = 8;
-			ri->ri_gnum = 8;
-			ri->ri_bnum = 8;
 			ri->ri_rpos = 16;
 			ri->ri_gpos = 8;
 			ri->ri_bpos = 0;
Index: arch/arm/fdt/arm_simplefb.c
===================================================================
RCS file: /home/netbsd/src/sys/arch/arm/fdt/arm_simplefb.c,v
retrieving revision 1.1
diff -p -u -r1.1 arm_simplefb.c
--- arch/arm/fdt/arm_simplefb.c	10 Oct 2020 15:25:31 -0000	1.1
+++ arch/arm/fdt/arm_simplefb.c	17 Oct 2020 18:21:55 -0000
@@ -39,6 +39,7 @@ __KERNEL_RCSID(0, "$NetBSD: arm_simplefb
 #include <sys/bus.h>
 #include <sys/cpu.h>
 #include <sys/device.h>
+#include <sys/endian.h>
 
 #include <dev/fdt/fdtvar.h>
 #include <arm/fdt/arm_fdtvar.h>
@@ -120,6 +121,16 @@ arm_simplefb_init_screen(void *cookie, s
 	ri->ri_bits = sc->sc_bits;
 	ri->ri_flg = RI_CENTER | RI_FULLCLEAR | RI_CLEAR;
 
+#if BYTE_ORDER == BIG_ENDIAN
+	if (ri->ri_depth == 32) {
+		ri->ri_rnum = ri->ri_gnum = ri->ri_bnum = 8;
+		ri->ri_rpos =  8;
+		ri->ri_gpos = 16;
+		ri->ri_bpos = 24;
+	}
+	/* XXX 16bpp */
+#endif
+
 	scr->scr_flags |= VCONS_LOADFONT;
 	scr->scr_flags |= VCONS_DONT_READ;
 
Index: arch/arm/sunxi/sunxi_debe.c
===================================================================
RCS file: /home/netbsd/src/sys/arch/arm/sunxi/sunxi_debe.c,v
retrieving revision 1.9
diff -p -u -r1.9 sunxi_debe.c
--- arch/arm/sunxi/sunxi_debe.c	1 Jun 2018 17:18:44 -0000	1.9
+++ arch/arm/sunxi/sunxi_debe.c	18 Oct 2020 11:17:51 -0000
@@ -613,7 +613,11 @@ sunxi_debe_set_videomode(device_t dev, c
 				 SUNXI_DEBE_ATTCTL1_LAY_FBFMT);
 		val &= ~SUNXI_DEBE_ATTCTL1_LAY_BRSWAPEN;
 		val &= ~SUNXI_DEBE_ATTCTL1_LAY_FBPS;
-#if __ARMEB__
+#if 0 /* XXX __ARMEB__ */
+/*
+ * XXX this function is not called from anywhere.
+ * invert byte-order by genfb(4) instead.
+ */
 		val |= __SHIFTIN(SUNXI_DEBE_ATTCTL1_LAY_FBPS_32BPP_BGRA,
 				 SUNXI_DEBE_ATTCTL1_LAY_FBPS);
 #else
Index: arch/arm/sunxi/sunxi_fb.c
===================================================================
RCS file: /home/netbsd/src/sys/arch/arm/sunxi/sunxi_fb.c,v
retrieving revision 1.3
diff -p -u -r1.3 sunxi_fb.c
--- arch/arm/sunxi/sunxi_fb.c	30 Jan 2019 10:55:44 -0000	1.3
+++ arch/arm/sunxi/sunxi_fb.c	17 Oct 2020 18:37:41 -0000
@@ -34,6 +34,7 @@ __KERNEL_RCSID(0, "$NetBSD: sunxi_fb.c,v
 #include <sys/param.h>
 #include <sys/bus.h>
 #include <sys/device.h>
+#include <sys/endian.h>
 
 #include <dev/fdt/fdtvar.h>
 
@@ -90,12 +91,20 @@ sunxi_fb_attach(device_t parent, device_
 	aprint_naive("\n");
 	aprint_normal("\n");
 
-#ifdef WSDISPLAY_MULTICONS
+#if defined(WSDISPLAY_MULTICONS) || BYTE_ORDER == BIG_ENDIAN
 	prop_dictionary_t dict = device_properties(self);
+#endif
+
+#ifdef WSDISPLAY_MULTICONS
 	const bool is_console = true;
 	prop_dictionary_set_bool(dict, "is_console", is_console);
 #endif
 
+#if BYTE_ORDER == BIG_ENDIAN
+	const bool is_swapped = true;
+	prop_dictionary_set_bool(dict, "is_swapped", is_swapped);
+#endif
+
 	const struct drmfb_attach_args da = {
 		.da_dev = self,
 		.da_fb_helper = sfa->sfa_fb_helper,