virtio-gpu: fix output lookup
Needed for multihead setups where we can have disabled outputs and therefore plane->crtc can be NULL. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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@ -63,11 +63,17 @@ static void virtio_gpu_plane_atomic_update(struct drm_plane *plane,
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{
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struct drm_device *dev = plane->dev;
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struct virtio_gpu_device *vgdev = dev->dev_private;
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struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(plane->crtc);
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struct virtio_gpu_output *output = NULL;
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struct virtio_gpu_framebuffer *vgfb;
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struct virtio_gpu_object *bo;
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uint32_t handle;
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if (plane->state->crtc)
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output = drm_crtc_to_virtio_gpu_output(plane->state->crtc);
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if (old_state->crtc)
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output = drm_crtc_to_virtio_gpu_output(old_state->crtc);
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WARN_ON(!output);
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if (plane->state->fb) {
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vgfb = to_virtio_gpu_framebuffer(plane->state->fb);
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bo = gem_to_virtio_gpu_obj(vgfb->obj);
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