In protocol B, the tracking ID can be set to -1. But since the min value is set to 0, the clients don't receive a -1 when a contact is lifted. The attached patch sets the min to -1 to fix this issue. Cheers. Sadrul
From dc5f39811bfd21409853fb4f5047f2ac47618c76 Mon Sep 17 00:00:00 2001 From: Sadrul Habib Chowdhury <sadrul@xxxxxxxxxxxx> Date: Thu, 14 Apr 2011 17:42:27 -0400 Subject: [PATCH] input-mt: Allow -1 for tracking id. The tracking id set to -1 when a slot is released. So allow the minimum value to reach -1. Change-Id: I8ffeaed70fd4824d5778ad2f2d7bc467157887fc Signed-off-by: Sadrul Habib Chowdhury <sadrul@xxxxxxxxxxxx> --- drivers/input/input-mt.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/drivers/input/input-mt.c b/drivers/input/input-mt.c index c48c81f..5fb11e4 100644 --- a/drivers/input/input-mt.c +++ b/drivers/input/input-mt.c @@ -39,7 +39,7 @@ int input_mt_init_slots(struct input_dev *dev, unsigned int num_slots) dev->mtsize = num_slots; input_set_abs_params(dev, ABS_MT_SLOT, 0, num_slots - 1, 0, 0); - input_set_abs_params(dev, ABS_MT_TRACKING_ID, 0, TRKID_MAX, 0, 0); + input_set_abs_params(dev, ABS_MT_TRACKING_ID, -1, TRKID_MAX, 0, 0); input_set_events_per_packet(dev, 6 * num_slots); /* Mark slots as 'unused' */ -- 1.7.2.3
