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drm/virtio: batch display update commands.

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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
This commit is contained in:
Gerd Hoffmann
2019-12-12 13:53:45 +01:00
parent 3954ff10e0
commit 7082e7a438
3 changed files with 31 additions and 2 deletions
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4
drivers/gpu/drm/virtio/virtgpu_plane.c
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@@ -146,6 +146,8 @@ static void virtio_gpu_primary_plane_update(struct drm_plane *plane,
return;
}
virtio_gpu_disable_notify(vgdev);
vgfb = to_virtio_gpu_framebuffer(plane->state->fb);
bo = gem_to_virtio_gpu_obj(vgfb->base.obj[0]);
if (bo->dumb)
@@ -177,6 +179,8 @@ static void virtio_gpu_primary_plane_update(struct drm_plane *plane,
plane->state->src_y >> 16,
plane->state->src_w >> 16,
plane->state->src_h >> 16);
virtio_gpu_enable_notify(vgdev);
}
static int virtio_gpu_cursor_prepare_fb(struct drm_plane *plane,