By testing the new MT_CLS_DEFAULT against the collection of device I have[1], I noticed that eGalax ones do not work because they don't provide the field ContactCount in their report descriptor. Removing this quirk for this kind of device allows them to work. [1] https://github.com/bentiss/hid-devices -> all these devices can be reinjected in the hid subsystem through uhid (kernel > 3.6) and hid-replay here: https://github.com/bentiss/hid-replay Signed-off-by: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxx> --- drivers/hid/hid-multitouch.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c index 36cf346..5e0a4d7 100644 --- a/drivers/hid/hid-multitouch.c +++ b/drivers/hid/hid-multitouch.c @@ -263,6 +263,9 @@ static ssize_t mt_set_quirks(struct device *dev, td->mtclass.quirks = val; + if (!td->contactcount) + td->mtclass.quirks &= ~MT_QUIRK_CONTACT_COUNT_ACCURATE; + return count; } @@ -856,6 +859,9 @@ static void mt_input_configured(struct hid_device *hdev, struct hid_input *hi) input_mt_init_slots(input, td->maxcontacts, td->mt_flags); + if (!td->contactcount) + cls->quirks &= ~MT_QUIRK_CONTACT_COUNT_ACCURATE; + td->mt_flags = 0; } -- 1.8.0 -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
