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>
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Коммит
16c10bede8
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@ -7,6 +7,7 @@
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#include <uapi/linux/virtio_ids.h>
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#include <uapi/linux/virtio_input.h>
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#include <linux/input/mt.h>
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struct virtio_input {
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struct virtio_device *vdev;
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@ -219,7 +220,7 @@ static int virtinput_probe(struct virtio_device *vdev)
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struct virtio_input *vi;
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unsigned long flags;
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size_t size;
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int abs, err;
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int abs, err, nslots;
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if (!virtio_has_feature(vdev, VIRTIO_F_VERSION_1))
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return -ENODEV;
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@ -304,6 +305,13 @@ static int virtinput_probe(struct virtio_device *vdev)
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continue;
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virtinput_cfg_abs(vi, abs);
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}
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if (test_bit(ABS_MT_SLOT, vi->idev->absbit)) {
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nslots = input_abs_get_max(vi->idev, ABS_MT_SLOT) + 1;
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err = input_mt_init_slots(vi->idev, nslots, 0);
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if (err)
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goto err_mt_init_slots;
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}
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}
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virtio_device_ready(vdev);
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@ -319,6 +327,7 @@ err_input_register:
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spin_lock_irqsave(&vi->lock, flags);
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vi->ready = false;
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spin_unlock_irqrestore(&vi->lock, flags);
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err_mt_init_slots:
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input_free_device(vi->idev);
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err_input_alloc:
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vdev->config->del_vqs(vdev);
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