From: Nick Dyer <nick.dyer@itdev.co.uk>
Date: Fri, 27 Jul 2018 18:49:10 +0000 (-0700)
Subject: Input: atmel_mxt_ts - don't report zero pressure from T9
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=2ca3ba0ae4cf0bf9c17f1a04298c3acca24be5e0;p=linux.git

Input: atmel_mxt_ts - don't report zero pressure from T9

If T9.CTRL DISAMP is set, then pressure is reported as zero. This means
some app layers (eg tslib) will ignore the contact.

Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---

diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index 77387f896262c..e32667d82d0f3 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -843,6 +843,10 @@ static void mxt_proc_t9_message(struct mxt_data *data, u8 *message)
 			mxt_input_sync(data);
 		}
 
+		/* if active, pressure must be non-zero */
+		if (!amplitude)
+			amplitude = MXT_PRESSURE_DEFAULT;
+
 		/* Touch active */
 		input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 1);
 		input_report_abs(input_dev, ABS_MT_POSITION_X, x);