--- zzzz-none-000/linux-5.4.213/drivers/video/fbdev/core/fb_defio.c	2022-09-15 10:04:56.000000000 +0000
+++ alder-5690pro-762/linux-5.4.213/drivers/video/fbdev/core/fb_defio.c	2024-08-14 09:02:08.000000000 +0000
@@ -168,6 +168,10 @@
 	vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
 	if (!(info->flags & FBINFO_VIRTFB))
 		vma->vm_flags |= VM_IO;
+
+	if (info->flags & FBINFO_DMAFB)
+		vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+
 	vma->vm_private_data = info;
 	return 0;
 }