HID: multitouch: Add ELAN production request when resume. (dfeefd10) · Commits · 戴 / test

drivers/hid/hid-multitouch.c

+27 −0

Original line number	Diff line number	Diff line
		@@ -765,6 +765,32 @@ 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)
		@@ -1102,6 +1128,7 @@ static struct hid_driver mt_driver = {
		.event = mt_event,
		#ifdef CONFIG_PM
		.reset_resume = mt_reset_resume,
		.resume = mt_resume,
		#endif
		};