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| author | Gerd Hoffmann <kraxel@redhat.com> | 2019-12-12 13:53:45 +0100 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2019-12-16 12:39:50 +0100 |
| commit | 7082e7a438db2abf13e4e1fa904875034de88b6b (patch) | |
| tree | 05ef7538a0397e8bb2e0cc3117b02fa985ab60b8 /drivers/gpu/drm/virtio/virtgpu_vq.c | |
| parent | 3954ff10e06e4fbc548fc02ff1fcaaac3228fed5 (diff) | |
| download | linux-stable-7082e7a438db2abf13e4e1fa904875034de88b6b.tar.gz linux-stable-7082e7a438db2abf13e4e1fa904875034de88b6b.tar.bz2 linux-stable-7082e7a438db2abf13e4e1fa904875034de88b6b.zip | |
drm/virtio: batch display update commands.
When the driver submits multiple commands in a row it makes sense to
notify the host only after submitting the last one, so the host can
process them all at once, with a single vmexit.
Add functions to enable/disable notifications to allow that. Use the
new functions for primary plane updates.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Chia-I Wu <olvaffe@gmail.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20191212125346.8334-3-kraxel@redhat.com
Diffstat (limited to 'drivers/gpu/drm/virtio/virtgpu_vq.c')
| -rw-r--r-- | drivers/gpu/drm/virtio/virtgpu_vq.c | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/drivers/gpu/drm/virtio/virtgpu_vq.c b/drivers/gpu/drm/virtio/virtgpu_vq.c index 9274c4063c70..5914e79d3429 100644 --- a/drivers/gpu/drm/virtio/virtgpu_vq.c +++ b/drivers/gpu/drm/virtio/virtgpu_vq.c @@ -404,8 +404,12 @@ again: } notify = virtio_gpu_queue_ctrl_buffer_locked(vgdev, vbuf, vout); spin_unlock(&vgdev->ctrlq.qlock); - if (notify) - virtqueue_notify(vgdev->ctrlq.vq); + if (notify) { + if (vgdev->disable_notify) + vgdev->pending_notify = true; + else + virtqueue_notify(vgdev->ctrlq.vq); + } if (sgt) { sg_free_table(sgt); @@ -413,6 +417,21 @@ again: } } +void virtio_gpu_disable_notify(struct virtio_gpu_device *vgdev) +{ + vgdev->disable_notify = true; +} + +void virtio_gpu_enable_notify(struct virtio_gpu_device *vgdev) +{ + vgdev->disable_notify = false; + + if (!vgdev->pending_notify) + return; + vgdev->pending_notify = false; + virtqueue_notify(vgdev->ctrlq.vq); +} + static void virtio_gpu_queue_ctrl_buffer(struct virtio_gpu_device *vgdev, struct virtio_gpu_vbuffer *vbuf) { |