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[PATCHv4,4/5] Input: edt-ft5x06: Ignore touchdown events

Message ID 1395234563-11034-5-git-send-email-LW@KARO-electronics.de (mailing list archive)
State New, archived
Headers show

Commit Message

Lothar Waßmann March 19, 2014, 1:09 p.m. UTC 
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>
---
 drivers/input/touchscreen/edt-ft5x06.c |    4 ++++
 1 file changed, 4 insertions(+)
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Patch

diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c
index 27dccfc..af736e4 100644
--- a/drivers/input/touchscreen/edt-ft5x06.c
+++ b/drivers/input/touchscreen/edt-ft5x06.c
@@ -175,6 +175,10 @@  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;