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authorBenjamin Tissoires <benjamin.tissoires@redhat.com>2013-08-22 14:51:09 +0200
committerJiri Kosina <jkosina@suse.cz>2013-08-27 10:00:00 +0200
commit595e9276ce68791317484ec7f0f9f2e0457c3b34 (patch)
tree58d40392b363a334656995f127b42daf20a377f4 /drivers/hid/usbhid/hid-core.c
parentHID: detect Win 8 multitouch devices in core (diff)
downloadlinux-595e9276ce68791317484ec7f0f9f2e0457c3b34.tar.xz
linux-595e9276ce68791317484ec7f0f9f2e0457c3b34.zip
HID: do not init input reports for Win 8 multitouch devices
Some multitouch screens do not like to be polled for input reports. However, the Win8 spec says that all touches should be sent during each report, making the initialization of reports unnecessary. The Win7 spec is less precise, so do not use this for those devices. Add the quirk HID_QUIRK_NO_INIT_INPUT_REPORTS so that we do not have to introduce a quirk for each problematic device. This quirk makes the driver behave the same way the Win 8 does. It actually retrieves the features, but not the inputs. Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Reviewed-by: Henrik Rydberg <rydberg@euromail.se> Tested-by: Srinivas Pandruvada<srinivas.pandruvada@linux.intel.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/usbhid/hid-core.c')
-rw-r--r--drivers/hid/usbhid/hid-core.c11
1 files changed, 8 insertions, 3 deletions
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;