commit de9973b24d10f0cb0b184a691393c6947e16523f
Author: Vladimir Kondratyev <wulf@FreeBSD.org>
Date:   Tue Aug 24 18:28:02 2021 +0300

    hmt(4): Add support for touchpads with no "button type" usage
    
    Assume touchpad to be a clickpad if it has only internal button.
    Fixes Dell Precision 7550 laptop.
    
    PR:     257992

diff --git a/sys/dev/hid/hmt.c b/sys/dev/hid/hmt.c
index cb7afe7290d..6e63f13b4ae 100644
--- a/sys/dev/hid/hmt.c
+++ b/sys/dev/hid/hmt.c
@@ -343,14 +343,14 @@ hmt_attach(device_t dev)
 		bzero(fbuf, fsize);
 		err = hid_get_report(dev, fbuf, sc->btn_type_rlen, NULL,
 		    HID_FEATURE_REPORT, sc->btn_type_rid);
-	}
-	if (sc->btn_type_rlen > 1) {
-		if (err == 0)
-			sc->is_clickpad = hid_get_udata(fbuf + 1,
-			    sc->btn_type_rlen - 1, &sc->btn_type_loc) == 0;
-		else
+		if (err != 0)
 			DPRINTF("hid_get_report error=%d\n", err);
 	}
+	if (sc->btn_type_rlen > 1 && err == 0)
+		sc->is_clickpad = hid_get_udata(fbuf + 1, sc->btn_type_rlen - 1,
+		    &sc->btn_type_loc) == 0;
+	else
+		sc->is_clickpad = sc->max_button == 0 && sc->has_int_button;
 
 	/* Fetch THQA certificate to enable some devices like WaveShare */
 	if (sc->thqa_cert_rlen > 1 && sc->thqa_cert_rid != sc->cont_max_rid)