From: Lothar Waßmann <LW@KARO-electronics.de>
Date: Fri, 28 Mar 2014 16:28:17 +0000 (-0700)
Subject: Input: edt-ft5x06 - ignore touchdown events
X-Git-Tag: firefly_0821_release~176^2~541^2~209^2~12
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=ee3e946e31e6df0f9845f9b3d527252003603530;p=firefly-linux-kernel-4.4.55.git

Input: edt-ft5x06 - ignore touchdown events

The chip may report invalid coordinates on touchdown events, so don't
report the initial touchdown event.

Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Acked-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---

diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c
index fd18e580870a..dd94b9eea6e7 100644
--- a/drivers/input/touchscreen/edt-ft5x06.c
+++ b/drivers/input/touchscreen/edt-ft5x06.c
@@ -176,6 +176,10 @@ static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id)
 		if (type == TOUCH_EVENT_RESERVED)
 			continue;
 
+		/* ignore TOUCH_DOWN events, might have bogus coordinates */
+		if (type == TOUCH_EVENT_DOWN)
+			continue;
+
 		x = ((buf[0] << 8) | buf[1]) & 0x0fff;
 		y = ((buf[2] << 8) | buf[3]) & 0x0fff;
 		id = (buf[2] >> 4) & 0x0f;