ANDROID: virtio: virtio_input: Set the amount of multitouch slots in virtio input
Virtio input was missing the the amount of multitouch
slots and kernel was filtering out ABS_MT_SLOT events
for a screen is touched in more than one place.
Bug: 143488374
Signed-off-by: Roman Kiryanov <rkir@google.com>
Change-Id: I617099435af311e6b0ee127b76eafe13834ea8f8
(cherry picked from commit af5cf146e4adae1dda52b006a86bab9d26e49a0e)
diff --git a/drivers/virtio/virtio_input.c b/drivers/virtio/virtio_input.c
index 3a0468f..89e14b0 100644
--- a/drivers/virtio/virtio_input.c
+++ b/drivers/virtio/virtio_input.c
@@ -2,6 +2,7 @@
#include <linux/virtio.h>
#include <linux/virtio_config.h>
#include <linux/input.h>
+#include <linux/input/mt.h>
#include <uapi/linux/virtio_ids.h>
#include <uapi/linux/virtio_input.h>
@@ -163,6 +164,12 @@ static void virtinput_cfg_abs(struct virtio_input *vi, int abs)
virtio_cread(vi->vdev, struct virtio_input_config, u.abs.flat, &fl);
input_set_abs_params(vi->idev, abs, mi, ma, fu, fl);
input_abs_set_res(vi->idev, abs, re);
+ if (abs == ABS_MT_TRACKING_ID)
+ input_mt_init_slots(vi->idev,
+ ma, /* input max finger */
+ INPUT_MT_DIRECT
+ | INPUT_MT_DROP_UNUSED
+ | INPUT_MT_TRACK);
}
static int virtinput_init_vqs(struct virtio_input *vi)
