From: Henrik Rydberg <rydberg@thabit.(none)>
As of lately, HID devices which send per-frame data split over several
HID reports have started to emerge. This patch adds a quirk which
allows the HID driver to take over the input layer synchronization,
and hence the control of the frame boundary.
Signed-off-by: Henrik Rydberg <rydberg@xxxxxxxxxxx>
---
Jiri, Dmitry, Stephane,
No doubt, this is not a final solution, but it serves the purpose of
being able to make existing drivers functional while a satisfactory
solution is being worked out.
Cheers,
Henrik
drivers/hid/hid-input.c | 3 +++
include/linux/hid.h | 1 +
2 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index 69d152e..9d97934 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -656,6 +656,9 @@ void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
{
struct hid_input *hidinput;
+ if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
+ return;
+
list_for_each_entry(hidinput, &hid->inputs, list)
input_sync(hidinput->input);
}
diff --git a/include/linux/hid.h b/include/linux/hid.h
index 895001f..8029883 100644
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -315,6 +315,7 @@ struct hid_item {
#define HID_QUIRK_FULLSPEED_INTERVAL 0x10000000
#define HID_QUIRK_NO_INIT_REPORTS 0x20000000
#define HID_QUIRK_NO_IGNORE 0x40000000
+#define HID_QUIRK_NO_INPUT_SYNC 0x80000000
/*
* This is the global environment of the parser. This information is
--
1.7.1
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