From mboxrd@z Thu Jan 1 00:00:00 1970 From: Scott Liu Subject: [PATCH v4 1/1] HID:hid-multitouch: Add ELAN production request when resume. Date: Wed, 15 Aug 2012 17:21:55 +0800 Message-ID: <1345022515-17272-1-git-send-email-scott.liu@emc.com.tw> Return-path: Received: from emcscan.emc.com.tw ([192.72.220.5]:58457 "EHLO emcscan.emc.com.tw" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753251Ab2HOJUu (ORCPT ); Wed, 15 Aug 2012 05:20:50 -0400 Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: "benjamin.tissoires" , Dmitry Torokhov , Jiri Kosina , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, eleghost@gmail.com Cc: Scott Liu 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 Suggested-off-by: Benjamin Tissoires --- 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