Thread (85 messages) 85 messages, 5 authors, 2014-05-26

Re: [PATCH 44/51] Input: atmel_mxt_ts - Handle reports from T47 Stylus object

From: <hidden>
Date: 2013-07-18 17:22:28
Also in: lkml

On Thu, Jun 27, 2013 at 01:49:19PM +0100, Nick Dyer wrote:
quoted hunk ↗ jump to hunk
Signed-off-by: Nick Dyer <redacted>
Acked-by: Benson Leung <bleung@chromium.org>
---
 drivers/input/touchscreen/atmel_mxt_ts.c |   16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index ee39683..ceb090a 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -128,6 +128,9 @@ struct t9_range {
 /* Define for MXT_PROCI_TOUCHSUPPRESSION_T42 */
 #define MXT_T42_MSG_TCHSUP	(1 << 0)
 
+/* T47 Stylus */
+#define MXT_TOUCH_MAJOR_T47_STYLUS	1
+
Ok - normally, creating dummy values is not recommended, but for the
shared touch/stylys implementation there is obviously no alternative.
quoted hunk ↗ jump to hunk
 /* T63 Stylus */
 #define MXT_T63_STYLUS_PRESS	(1 << 0)
 #define MXT_T63_STYLUS_RELEASE	(1 << 1)
@@ -696,6 +699,7 @@ static void mxt_proc_t9_message(struct mxt_data *data, u8 *message)
 	int area;
 	int amplitude;
 	u8 vector;
+	int tool;
 
 	/* do not report events if input device not yet registered */
 	if (!data->enable_reporting)
@@ -713,6 +717,7 @@ static void mxt_proc_t9_message(struct mxt_data *data, u8 *message)
 		y >>= 2;
 
 	area = message[5];
+
 	amplitude = message[6];
 	vector = message[7];
 
@@ -741,8 +746,17 @@ static void mxt_proc_t9_message(struct mxt_data *data, u8 *message)
 			mxt_input_sync(input_dev);
 		}
 
+		/* A reported size of zero indicates that the reported touch
+		 * is a stylus from a linked Stylus T47 object. */
+		if (area == 0) {
+			area = MXT_TOUCH_MAJOR_T47_STYLUS;
+			tool = MT_TOOL_PEN;
+		} else {
+			tool = MT_TOOL_FINGER;
+		}
+
 		/* Touch active */
-		input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 1);
+		input_mt_report_slot_state(input_dev, tool, 1);
 		input_report_abs(input_dev, ABS_MT_POSITION_X, x);
 		input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
 		input_report_abs(input_dev, ABS_MT_PRESSURE, amplitude);
-- 
1.7.10.4
    Reviewed-by: Henrik Rydberg [off-list ref]

Thanks,
Henrik
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