diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c index c28ef86c7c672e599102b7c1ae15b78c35ea7886..ac28f08c38660b0051500242f8562b587007cf90 100644 --- a/drivers/hid/hid-multitouch.c +++ b/drivers/hid/hid-multitouch.c @@ -951,6 +951,18 @@ static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id) hdev->quirks |= HID_QUIRK_MULTI_INPUT; hdev->quirks |= HID_QUIRK_NO_EMPTY_INPUT; + /* + * Handle special quirks for Windows 8 certified devices. + */ + if (id->group == HID_GROUP_MULTITOUCH_WIN_8) + /* + * Some multitouch screens do not like to be polled for input + * reports. Fortunately, the Win8 spec says that all touches + * should be sent during each report, making the initialization + * of input reports unnecessary. + */ + hdev->quirks |= HID_QUIRK_NO_INIT_INPUT_REPORTS; + td = devm_kzalloc(&hdev->dev, sizeof(struct mt_device), GFP_KERNEL); if (!td) { dev_err(&hdev->dev, "cannot allocate multitouch data\n"); diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c index 99418285222cf118cbc09e4d9029c80ba3493fcf..55ea9c40140e45c5a1c902601e8aebd948b2ee54 100644 --- a/drivers/hid/usbhid/hid-core.c +++ b/drivers/hid/usbhid/hid-core.c @@ -807,12 +807,17 @@ void usbhid_init_reports(struct hid_device *hid) { struct hid_report *report; struct usbhid_device *usbhid = hid->driver_data; + struct hid_report_enum *report_enum; int err, ret; - list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].report_list, list) - usbhid_submit_report(hid, report, USB_DIR_IN); + if (!(hid->quirks & HID_QUIRK_NO_INIT_INPUT_REPORTS)) { + report_enum = &hid->report_enum[HID_INPUT_REPORT]; + list_for_each_entry(report, &report_enum->report_list, list) + usbhid_submit_report(hid, report, USB_DIR_IN); + } - list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].report_list, list) + report_enum = &hid->report_enum[HID_FEATURE_REPORT]; + list_for_each_entry(report, &report_enum->report_list, list) usbhid_submit_report(hid, report, USB_DIR_IN); err = 0; diff --git a/include/linux/hid.h b/include/linux/hid.h index cef1e9b86cc4ad98be5cbbd6f76a675b68db298d..bc132d2a20aad8333f7140e55575ce827df59a57 100644 --- a/include/linux/hid.h +++ b/include/linux/hid.h @@ -283,6 +283,7 @@ struct hid_item { #define HID_QUIRK_MULTI_INPUT 0x00000040 #define HID_QUIRK_HIDINPUT_FORCE 0x00000080 #define HID_QUIRK_NO_EMPTY_INPUT 0x00000100 +#define HID_QUIRK_NO_INIT_INPUT_REPORTS 0x00000200 #define HID_QUIRK_SKIP_OUTPUT_REPORTS 0x00010000 #define HID_QUIRK_FULLSPEED_INTERVAL 0x10000000 #define HID_QUIRK_NO_INIT_REPORTS 0x20000000