Input: atmel_mxt_ts - send all MT-B slots in one input report

Each interrupt contains information for all contacts with changing
properties.  Process all of this information at once, and send it all in a
a single input report (ie input events ending in EV_SYN/SYN_REPORT).

This patch was tested using an MXT224E.

Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>

1 files changed, 10 insertions, 5 deletions

diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index 2746b0dc7f36..4c9a06c7eae3 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -547,9 +547,6 @@ static void mxt_input_touchevent(struct mxt_data *data,
                 input_report_abs(input_dev, ABS_MT_PRESSURE, pressure);
                 input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, area);
         }
-
-        input_mt_report_pointer_emulation(input_dev, false);
-        input_sync(input_dev);
 }
 
 static bool mxt_is_T9_message(struct mxt_data *data, struct mxt_message *msg)
@@ -565,6 +562,7 @@ static irqreturn_t mxt_interrupt(int irq, void *dev_id)
         struct device *dev = &data->client->dev;
         int id;
         u8 reportid;
+        bool update_input = false;
 
         do {
                 if (mxt_read_message(data, &message)) {
@@ -576,12 +574,19 @@ static irqreturn_t mxt_interrupt(int irq, void *dev_id)
 
                 id = reportid - data->T9_reportid_min;
 
-                if (mxt_is_T9_message(data, &message))
+                if (mxt_is_T9_message(data, &message)) {
                         mxt_input_touchevent(data, &message, id);
-                else
+                        update_input = true;
+                } else {
                         mxt_dump_message(dev, &message);
+                }
         } while (reportid != 0xff);
 
+        if (update_input) {
+                input_mt_report_pointer_emulation(data->input_dev, false);
+                input_sync(data->input_dev);
+        }
+
 end:
         return IRQ_HANDLED;
 }