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| author |   Benjamin Tissoires <benjamin.tissoires@gmail.com> | 2012-11-14 16:59:25 +0100 |
|---|---|---|
| committer |   Jiri Kosina <jkosina@suse.cz> | 2012-11-15 10:19:00 +0100 |
| commit | 1b42fc4a2889729c740321eb487f887161e38428 (patch) | |
| tree | cf0013bde2a89ec50c44587936fe106e71818e63 /drivers/hid | |
| parent | HID: multitouch: support for hovering devices (diff) | |
| download | linux-dev-1b42fc4a2889729c740321eb487f887161e38428.tar.xz linux-dev-1b42fc4a2889729c740321eb487f887161e38428.zip | |
HID: multitouch: fix Win 8 protocol
The Win 8 protocol specify the fact that each valid touch must be reported
within a frame until it is released.
We can therefore use the always_valid quirk and dismiss reports when we see
duplicate contacts ID.
We recognize Win8 certified devices from their vendor feature 0xff0000c5
where Microsoft put a signed blob in the report to check if the device
passed the certification.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Reviewed-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid')
| -rw-r--r-- | drivers/hid/hid-multitouch.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c index 0a0489309905..61543c02ea0b 100644 --- a/drivers/hid/hid-multitouch.c +++ b/drivers/hid/hid-multitouch.c @@ -294,6 +294,18 @@ static void mt_feature_mapping(struct hid_device *hdev, td->maxcontacts = td->mtclass.maxcontacts; break; + case 0xff0000c5: + if (field->report_count == 256 && field->report_size == 8) { + /* Win 8 devices need special quirks */ + __s32 *quirks = &td->mtclass.quirks; + *quirks |= MT_QUIRK_ALWAYS_VALID; + *quirks |= MT_QUIRK_IGNORE_DUPLICATES; + *quirks |= MT_QUIRK_HOVERING; + *quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP; + *quirks &= ~MT_QUIRK_VALID_IS_INRANGE; + *quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE; + } + break; } } |