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authorMathias Crombez <mathias.crombez@faurecia.com>2021-01-15 03:26:23 +0300
committerMichael S. Tsirkin <mst@redhat.com>2021-02-23 15:52:59 +0300
commit16c10bede8b3d8594279752bf53153491f3f944f (patch)
tree42a0fa0f528b92c620121f3549e6d2add3305b36 /drivers/virtio
parent0c4aeb4b5087f09ef61ff362394202ab7cf9f3e2 (diff)
downloadlinux-16c10bede8b3d8594279752bf53153491f3f944f.tar.xz
virtio-input: add multi-touch support
Without multi-touch slots allocated, ABS_MT_SLOT events will be lost by input_handle_abs_event. Implementation is based on uinput_create_device. Signed-off-by: Mathias Crombez <mathias.crombez@faurecia.com> Co-developed-by: Vasyl Vavrychuk <vasyl.vavrychuk@opensynergy.com> Signed-off-by: Vasyl Vavrychuk <vasyl.vavrychuk@opensynergy.com> Link: https://lore.kernel.org/r/20210115002623.8576-1-vasyl.vavrychuk@opensynergy.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'drivers/virtio')
-rw-r--r--drivers/virtio/virtio_input.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/virtio/virtio_input.c b/drivers/virtio/virtio_input.c
index 244965c20d9b..ce51ae165943 100644
--- a/drivers/virtio/virtio_input.c
+++ b/drivers/virtio/virtio_input.c
@@ -7,6 +7,7 @@
#include <uapi/linux/virtio_ids.h>
#include <uapi/linux/virtio_input.h>
+#include <linux/input/mt.h>
struct virtio_input {
struct virtio_device *vdev;
@@ -219,7 +220,7 @@ static int virtinput_probe(struct virtio_device *vdev)
struct virtio_input *vi;
unsigned long flags;
size_t size;
- int abs, err;
+ int abs, err, nslots;
if (!virtio_has_feature(vdev, VIRTIO_F_VERSION_1))
return -ENODEV;
@@ -304,6 +305,13 @@ static int virtinput_probe(struct virtio_device *vdev)
continue;
virtinput_cfg_abs(vi, abs);
}
+
+ if (test_bit(ABS_MT_SLOT, vi->idev->absbit)) {
+ nslots = input_abs_get_max(vi->idev, ABS_MT_SLOT) + 1;
+ err = input_mt_init_slots(vi->idev, nslots, 0);
+ if (err)
+ goto err_mt_init_slots;
+ }
}
virtio_device_ready(vdev);
@@ -319,6 +327,7 @@ err_input_register:
spin_lock_irqsave(&vi->lock, flags);
vi->ready = false;
spin_unlock_irqrestore(&vi->lock, flags);
+err_mt_init_slots:
input_free_device(vi->idev);
err_input_alloc:
vdev->config->del_vqs(vdev);