[PATCH] drm/amdgpu: Remove warning for virtual_display

[Emily.Deng]

Remove the virtual_display warning in drm_crtc_vblank_off when
dev->num_crtcs is null.

Signed-off-by: Emily.Deng <Emily.Deng at amd.com>
Change-Id: I755150a32478d8c128eed7ed98a71175d2b3aefc
---
 drivers/gpu/drm/amd/amdgpu/dce_virtual.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/dce_virtual.c b/drivers/gpu/drm/amd/amdgpu/dce_virtual.c
index 469c05fd43d5..b4d4b76538d2 100644
--- a/drivers/gpu/drm/amd/amdgpu/dce_virtual.c
+++ b/drivers/gpu/drm/amd/amdgpu/dce_virtual.c
@@ -174,8 +174,10 @@ static void dce_virtual_crtc_commit(struct drm_crtc *crtc)
 static void dce_virtual_crtc_disable(struct drm_crtc *crtc)
 {
 	struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
+	struct drm_device *dev = crtc->dev;
 
-	drm_crtc_vblank_off(crtc);
+	if (dev->num_crtcs)
+		drm_crtc_vblank_off(crtc);
 
 	amdgpu_crtc->enabled = false;
 	amdgpu_crtc->pll_id = ATOM_PPLL_INVALID;
-- 
2.25.1