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HID: multitouch: force retrieving of Win8 signature blob

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The Synaptics 0x11e5 over I2C found in the Asus T100-CHI requires to
fetch the signature blob to actually start sending events.

With this patch, we should be close enough to the Windows driver which
checks the content of the blob at plugin to validate or not the
touchscreen.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=113481
Fixes: 6d4f5440 ("HID: multitouch: Fetch feature reports on demand for Win8 devices")
Cc: stable@vger.kernel.org
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Benjamin Tissoires 2016-03-07 11:02:38 +01:00 committed by Jiri Kosina
parent c2848f2eef
commit 45c5c68282
1 changed files with 5 additions and 0 deletions
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5
drivers/hid/hid-multitouch.c
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@ -396,6 +396,11 @@ static void mt_feature_mapping(struct hid_device *hdev,
td->is_buttonpad = true;
break;
case 0xff0000c5:
/* Retrieve the Win8 blob once to enable some devices */
if (usage->usage_index == 0)
mt_get_feature(hdev, field->report);
break;
}
}