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-rw-r--r--drivers/hid/hid-multitouch.c12
-rw-r--r--drivers/hid/usbhid/hid-core.c11
-rw-r--r--include/linux/hid.h1
3 files changed, 21 insertions, 3 deletions
diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index c28ef86c7c67..ac28f08c3866 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 99418285222c..55ea9c40140e 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 cef1e9b86cc4..bc132d2a20aa 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