linux-kernel - [PATCH v9 07/55] Input: atmel_mxt_ts - implement T9 vector/orientation support

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Date:   Wed, 25 Mar 2020 06:32:46 -0700
From:   Jiada Wang <jiada_wang@...tor.com>
To:     <nick@...anahar.org>, <dmitry.torokhov@...il.com>,
        <jikos@...nel.org>, <benjamin.tissoires@...hat.com>,
        <bsz@...ihalf.com>, <rydberg@...math.org>
CC:     <linux-input@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <erosca@...adit-jv.com>, <Andrew_Gabbasov@...tor.com>,
        <jiada_wang@...tor.com>
Subject: [PATCH v9 07/55] Input: atmel_mxt_ts - implement T9 vector/orientation support

From: Nick Dyer <nick.dyer@...ev.co.uk>

The atmel touch messages contain orientation information as a byte in a
packed format which can be passed straight on to Android if the input
device configuration is correct.

This requires vector reports to be enabled in maXTouch config (zero
DISVECT bit 3 in T9 CTRL field)

Android converts the format in InputReader.cpp, search for
ORIENTATION_CALIBRATION_VECTOR.

Signed-off-by: Nick Dyer <nick.dyer@...ev.co.uk>
Acked-by: Benson Leung <bleung@...omium.org>
Acked-by: Yufeng Shen <miletus@...omium.org>
(cherry picked from ndyer/linux/for-upstream commit a6f0ee919d2631678169b23fb18f55b6dbabcd4c)
Signed-off-by: George G. Davis <george_davis@...tor.com>
Signed-off-by: Jiada Wang <jiada_wang@...tor.com>
---
 drivers/input/touchscreen/atmel_mxt_ts.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index f6465edaa57e..df2e0ba76e63 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -817,6 +817,7 @@ static void mxt_proc_t9_message(struct mxt_data *data, u8 *message)
 	int y;
 	int area;
 	int amplitude;
+	u8 vector;
 
 	id = message[0] - data->T9_reportid_min;
 	status = message[1];
@@ -831,9 +832,10 @@ static void mxt_proc_t9_message(struct mxt_data *data, u8 *message)
 
 	area = message[5];
 	amplitude = message[6];
+	vector = message[7];
 
 	dev_dbg(dev,
-		"[%u] %c%c%c%c%c%c%c%c x: %5u y: %5u area: %3u amp: %3u\n",
+		"[%u] %c%c%c%c%c%c%c%c x: %5u y: %5u area: %3u amp: %3u vector: %02X\n",
 		id,
 		(status & MXT_T9_DETECT) ? 'D' : '.',
 		(status & MXT_T9_PRESS) ? 'P' : '.',
@@ -843,7 +845,7 @@ static void mxt_proc_t9_message(struct mxt_data *data, u8 *message)
 		(status & MXT_T9_AMP) ? 'A' : '.',
 		(status & MXT_T9_SUPPRESS) ? 'S' : '.',
 		(status & MXT_T9_UNGRIP) ? 'U' : '.',
-		x, y, area, amplitude);
+		x, y, area, amplitude, vector);
 
 	input_mt_slot(input_dev, id);
 
@@ -868,6 +870,7 @@ static void mxt_proc_t9_message(struct mxt_data *data, u8 *message)
 		input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
 		input_report_abs(input_dev, ABS_MT_PRESSURE, amplitude);
 		input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, area);
+		input_report_abs(input_dev, ABS_MT_ORIENTATION, vector);
 	} else {
 		/* Touch no longer active, close out slot */
 		input_mt_report_slot_inactive(input_dev);
@@ -2180,8 +2183,9 @@ static int mxt_initialize_input_device(struct mxt_data *data)
 				     0, 255, 0, 0);
 	}
 
-	if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
-	    data->t100_aux_vect) {
+	if (data->multitouch == MXT_TOUCH_MULTI_T9 ||
+	    (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 &&
+	    data->t100_aux_vect)) {
 		input_set_abs_params(input_dev, ABS_MT_ORIENTATION,
 				     0, 255, 0, 0);
 	}
-- 
2.17.1