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-rw-r--r--drivers/input/touchscreen/atmel_mxt_ts.c36
1 files changed, 28 insertions, 8 deletions
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index 7951d9bcee4..97495c7edae 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -654,6 +654,12 @@ static void mxt_input_button(struct mxt_data *data, struct mxt_message *message)
}
}
+static void mxt_input_sync(struct input_dev *input_dev)
+{
+ input_mt_report_pointer_emulation(input_dev, false);
+ input_sync(input_dev);
+}
+
static void mxt_input_touchevent(struct mxt_data *data,
struct mxt_message *message, int id)
{
@@ -667,10 +673,12 @@ static void mxt_input_touchevent(struct mxt_data *data,
x = (message->message[1] << 4) | ((message->message[3] >> 4) & 0xf);
y = (message->message[2] << 4) | ((message->message[3] & 0xf));
+
+ /* Handle 10/12 bit switching */
if (data->max_x < 1024)
- x = x >> 2;
+ x >>= 2;
if (data->max_y < 1024)
- y = y >> 2;
+ y >>= 2;
area = message->message[4];
amplitude = message->message[5];
@@ -689,14 +697,28 @@ static void mxt_input_touchevent(struct mxt_data *data,
x, y, area, amplitude);
input_mt_slot(input_dev, id);
- input_mt_report_slot_state(input_dev, MT_TOOL_FINGER,
- status & MXT_T9_DETECT);
if (status & MXT_T9_DETECT) {
+ /*
+ * Multiple bits may be set if the host is slow to read
+ * the status messages, indicating all the events that
+ * have happened.
+ */
+ if (status & MXT_T9_RELEASE) {
+ input_mt_report_slot_state(input_dev,
+ MT_TOOL_FINGER, 0);
+ mxt_input_sync(input_dev);
+ }
+
+ /* Touch active */
+ input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 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);
input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, area);
+ } else {
+ /* Touch no longer active, close out slot */
+ input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 0);
}
}
@@ -754,10 +776,8 @@ static irqreturn_t mxt_process_messages_until_invalid(struct mxt_data *data)
}
} while (reportid != 0xff);
- if (update_input) {
- input_mt_report_pointer_emulation(data->input_dev, false);
- input_sync(data->input_dev);
- }
+ if (update_input)
+ mxt_input_sync(data->input_dev);
return IRQ_HANDLED;
}