Add ELAN production request when resume.
Some Elan legacy devices require SET_IDLE to be set on resume.
It should be safe to send it to other devices too.
Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels.
Signed-off-by: Scott Liu <scott.liu@xxxxxxxxxx>
Suggested-off-by: Benjamin Tissoires <benjamin.tissoires@xxxxxxx>
---
drivers/hid/hid-multitouch.c | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index 59c8b5c..e824c37 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -767,6 +767,32 @@ static int mt_reset_resume(struct hid_device *hdev)
mt_set_input_mode(hdev);
return 0;
}
+
+static int mt_resume(struct hid_device *hdev)
+{
+ struct usb_interface *intf;
+ struct usb_host_interface *interface;
+ struct usb_device *dev;
+
+ if (hdev->bus != BUS_USB)
+ return 0;
+
+ intf = to_usb_interface(hdev->dev.parent);
+ interface = intf->cur_altsetting;
+ dev = hid_to_usb_dev(hdev);
+
+ /* Some Elan legacy devices require SET_IDLE to be set on resume.
+ * It should be safe to send it to other devices too.
+ * Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels. */
+
+ usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+ HID_REQ_SET_IDLE,
+ USB_TYPE_CLASS | USB_RECIP_INTERFACE,
+ 0, interface->desc.bInterfaceNumber,
+ NULL, 0, USB_CTRL_SET_TIMEOUT);
+
+ return 0;
+}
#endif
static void mt_remove(struct hid_device *hdev)
@@ -1092,6 +1118,7 @@ static struct hid_driver mt_driver = {
.event = mt_event,
#ifdef CONFIG_PM
.reset_resume = mt_reset_resume,
+ .resume = mt_resume,
#endif
};
--
1.7.9.5
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