Merge branch 'for-5.14/multitouch' into for-linus

- patch series that ensures that hid-multitouch driver disables touch and
  button-press reporting on hid-mt devices during suspend when the device is
  not configured as a wakeup-source, from Hans de Goede

Author: Jiri Kosina

drivers/hid/hid-logitech-dj.c

@@ -1497,6 +1497,13 @@ static void logi_dj_ll_stop(struct hid_device *hid)
 	dbg_hid("%s\n", __func__);
 }
 
+static bool logi_dj_ll_may_wakeup(struct hid_device *hid)
+{
+	struct dj_device *djdev = hid->driver_data;
+	struct dj_receiver_dev *djrcv_dev = djdev->dj_receiver_dev;
+
+	return hid_hw_may_wakeup(djrcv_dev->hidpp);
+}
 
 static struct hid_ll_driver logi_dj_ll_driver = {
 	.parse = logi_dj_ll_parse,
@@ -1505,6 +1512,7 @@ static struct hid_ll_driver logi_dj_ll_driver = {
 	.open = logi_dj_ll_open,
 	.close = logi_dj_ll_close,
 	.raw_request = logi_dj_ll_raw_request,
+	.may_wakeup = logi_dj_ll_may_wakeup,
 };
 
 static int logi_dj_dj_event(struct hid_device *hdev,

drivers/hid/hid-multitouch.c

@@ -1768,7 +1768,8 @@ static int mt_suspend(struct hid_device *hdev, pm_message_t state)
 	struct mt_device *td = hid_get_drvdata(hdev);
 
 	/* High latency is desirable for power savings during S3/S0ix */
-	if (td->mtclass.quirks & MT_QUIRK_DISABLE_WAKEUP)
+	if ((td->mtclass.quirks & MT_QUIRK_DISABLE_WAKEUP) ||
+	    !hid_hw_may_wakeup(hdev))
 		mt_set_modes(hdev, HID_LATENCY_HIGH, false, false);
 	else
 		mt_set_modes(hdev, HID_LATENCY_HIGH, true, true);

drivers/hid/usbhid/hid-core.c

@@ -1304,6 +1304,13 @@ static int usbhid_idle(struct hid_device *hid, int report, int idle,
 	return hid_set_idle(dev, ifnum, report, idle);
 }
 
+static bool usbhid_may_wakeup(struct hid_device *hid)
+{
+	struct usb_device *dev = hid_to_usb_dev(hid);
+
+	return device_may_wakeup(&dev->dev);
+}
+
 struct hid_ll_driver usb_hid_driver = {
 	.parse = usbhid_parse,
 	.start = usbhid_start,
@@ -1316,6 +1323,7 @@ struct hid_ll_driver usb_hid_driver = {
 	.raw_request = usbhid_raw_request,
 	.output_report = usbhid_output_report,
 	.idle = usbhid_idle,
+	.may_wakeup = usbhid_may_wakeup,
 };
 EXPORT_SYMBOL_GPL(usb_hid_driver);
 

include/linux/hid.h

@@ -801,6 +801,7 @@ struct hid_driver {
  * @raw_request: send raw report request to device (e.g. feature report)
  * @output_report: send output report to device
  * @idle: send idle request to device
+ * @may_wakeup: return if device may act as a wakeup source during system-suspend
  */
 struct hid_ll_driver {
 	int (*start)(struct hid_device *hdev);
@@ -825,6 +826,7 @@ struct hid_ll_driver {
 	int (*output_report) (struct hid_device *hdev, __u8 *buf, size_t len);
 
 	int (*idle)(struct hid_device *hdev, int report, int idle, int reqtype);
+	bool (*may_wakeup)(struct hid_device *hdev);
 };
 
 extern struct hid_ll_driver i2c_hid_ll_driver;
@@ -1150,6 +1152,22 @@ static inline int hid_hw_idle(struct hid_device *hdev, int report, int idle,
 	return 0;
 }
 
+/**
+ * hid_may_wakeup - return if the hid device may act as a wakeup source during system-suspend
+ *
+ * @hdev: hid device
+ */
+static inline bool hid_hw_may_wakeup(struct hid_device *hdev)
+{
+	if (hdev->ll_driver->may_wakeup)
+		return hdev->ll_driver->may_wakeup(hdev);
+
+	if (hdev->dev.parent)
+		return device_may_wakeup(hdev->dev.parent);
+
+	return false;
+}
+
 /**
  * hid_hw_wait - wait for buffered io to complete
  *