drm/nv20/fb: fix zcomp register calculation on big-endian systems

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/core/subdev/fb/nv20.c

@@ -61,6 +61,9 @@ nv20_fb_tile_comp(struct nouveau_fb *pfb, int i, u32 size, u32 flags,
 		tile->zcomp |= 0x80000000;
 		if (bpp != 16)
 			tile->zcomp |= 0x04000000;
+#ifdef __BIG_ENDIAN
+		tile->zcomp |= 0x08000000;
+#endif
 	}
 }
 

drivers/gpu/drm/nouveau/core/subdev/fb/nv25.c

@@ -49,6 +49,9 @@ nv25_fb_tile_comp(struct nouveau_fb *pfb, int i, u32 size, u32 flags,
 			tile->zcomp |= 0x00100000;
 		else
 			tile->zcomp |= 0x00200000;
+#ifdef __BIG_ENDIAN
+		tile->zcomp |= 0x01000000;
+#endif
 	}
 }