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Subject[PATCH] input: egalax: Send touch end event when is about to suspend
Date
From: "Felipe F. Tonello" <eu@felipetonello.com>

This is useful to report for users of this device that don't know anything
about the suspension of the device. So users will receive a touch end event
when the device is about to suspend, making it more user friendly.

One example of users is the X Server with the evdev input driver. This patch
make sure that the X server will propagate a touch end event to its windows.

Signed-off-by: Felipe F. Tonello <eu@felipetonello.com>
---
drivers/input/touchscreen/egalax_ts.c | 18 +++++++++++++++++-
1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/drivers/input/touchscreen/egalax_ts.c b/drivers/input/touchscreen/egalax_ts.c
index 054d225..1f21f0d 100644
--- a/drivers/input/touchscreen/egalax_ts.c
+++ b/drivers/input/touchscreen/egalax_ts.c
@@ -63,6 +63,7 @@
struct egalax_ts {
struct i2c_client *client;
struct input_dev *input_dev;
+ bool ids_in_use[MAX_SUPPORT_POINTS];
};

static irqreturn_t egalax_ts_interrupt(int irq, void *dev_id)
@@ -117,6 +118,8 @@ static irqreturn_t egalax_ts_interrupt(int irq, void *dev_id)
input_mt_report_pointer_emulation(input_dev, true);
input_sync(input_dev);

+ ts->ids_in_use[id] = down;
+
return IRQ_HANDLED;
}

@@ -247,9 +250,22 @@ static int egalax_ts_suspend(struct device *dev)
0x3, 0x6, 0xa, 0x3, 0x36, 0x3f, 0x2, 0, 0, 0
};
struct i2c_client *client = to_i2c_client(dev);
- int ret;
+ struct egalax_ts *ts = i2c_get_clientdata(client);
+ int ret, id;

ret = i2c_master_send(client, suspend_cmd, MAX_I2C_DATA_LEN);
+
+ /* We send a touch end event (for the ids in use) if the egalax module is
+ about to be turned off. */
+ for (id = 0; id < MAX_SUPPORT_POINTS; ++id) {
+ if (ts->ids_in_use[id]) {
+ input_mt_slot(ts->input_dev, id);
+ input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, false);
+ input_mt_report_pointer_emulation(ts->input_dev, true);
+ input_sync(ts->input_dev);
+ }
+ }
+
return ret > 0 ? 0 : ret;
}

--
1.8.3.1


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