Using the wrong mask.
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Noticed-by: Hans de Ruiter <hans@keasigmadelta.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
 static bool dce_v10_0_is_in_vblank(struct amdgpu_device *adev, int crtc)
 {
        if (RREG32(mmCRTC_STATUS + crtc_offsets[crtc]) &
-                       CRTC_V_BLANK_START_END__CRTC_V_BLANK_START_MASK)
+           CRTC_STATUS__CRTC_V_BLANK_MASK)
                return true;
        else
                return false;
 
 static bool dce_v11_0_is_in_vblank(struct amdgpu_device *adev, int crtc)
 {
        if (RREG32(mmCRTC_STATUS + crtc_offsets[crtc]) &
-                       CRTC_V_BLANK_START_END__CRTC_V_BLANK_START_MASK)
+           CRTC_STATUS__CRTC_V_BLANK_MASK)
                return true;
        else
                return false;
 
 static bool dce_v8_0_is_in_vblank(struct amdgpu_device *adev, int crtc)
 {
        if (RREG32(mmCRTC_STATUS + crtc_offsets[crtc]) &
-                       CRTC_V_BLANK_START_END__CRTC_V_BLANK_START_MASK)
+           CRTC_STATUS__CRTC_V_BLANK_MASK)
                return true;
        else
                return false;