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Date:      Sat, 20 Apr 2019 21:00:44 +0000 (UTC)
From:      Vladimir Kondratyev <wulf@FreeBSD.org>
To:        src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org
Subject:   svn commit: r346455 - head/sys/dev/atkbdc
Message-ID:  <201904202100.x3KL0ikO005059@repo.freebsd.org>
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Author: wulf
Date: Sat Apr 20 21:00:44 2019
New Revision: 346455
URL: https://svnweb.freebsd.org/changeset/base/346455

Log:
  psm(4): Add support for 4 and 5 finger touches in synaptics driver
  
  While 4-th and 5-th finger positions are not exported through PS/2
  interface, total number of touches is reported by MT trackpads.
  
  MFC after:	2 weeks

Modified:
  head/sys/dev/atkbdc/psm.c

Modified: head/sys/dev/atkbdc/psm.c
==============================================================================
--- head/sys/dev/atkbdc/psm.c	Sat Apr 20 20:29:03 2019	(r346454)
+++ head/sys/dev/atkbdc/psm.c	Sat Apr 20 21:00:44 2019	(r346455)
@@ -1830,7 +1830,7 @@ psm_register_synaptics(device_t dev)
 	if (sc->synhw.capClickPad && sc->synhw.topButtonPad)
 		evdev_support_prop(evdev_a, INPUT_PROP_TOPBUTTONPAD);
 	evdev_support_key(evdev_a, BTN_TOUCH);
-	evdev_support_nfingers(evdev_a, 3);
+	evdev_support_nfingers(evdev_a, sc->synhw.capReportsV ? 5 : 3);
 	psm_support_abs_bulk(evdev_a, synaptics_absinfo_st);
 	if (sc->synhw.capAdvancedGestures || sc->synhw.capReportsV)
 		psm_support_abs_bulk(evdev_a, synaptics_absinfo_mt);
@@ -3212,6 +3212,7 @@ proc_synaptics(struct psm_softc *sc, packetbuf_t *pb, 
 {
 	static int touchpad_buttons;
 	static int guest_buttons;
+	static int ew_finger_count;
 	static finger_t f[PSM_FINGERS];
 	int w, id, nfingers, ewcode, extended_buttons, clickpad_pressed;
 
@@ -3372,6 +3373,9 @@ proc_synaptics(struct psm_softc *sc, packetbuf_t *pb, 
 					    (pb->ipacket[1] & 0x01)) + 8,
 					.flags = PSM_FINGER_FUZZY,
 				};
+			break;
+		case 2:
+			ew_finger_count = pb->ipacket[1] & 0x0f;
 		default:
 			break;
 		}
@@ -3379,6 +3383,11 @@ proc_synaptics(struct psm_softc *sc, packetbuf_t *pb, 
 		goto SYNAPTICS_END;
 
 	case 1:
+		if (sc->synhw.capReportsV && ew_finger_count > 3) {
+			nfingers = ew_finger_count;
+			break;
+		}
+		/* FALLTHROUGH */
 	case 0:
 		nfingers = w + 2;
 		break;

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