DxMODE_VLINE_ACK 3947 drivers/gpu/drm/radeon/r600.c 		WREG32(D1MODE_VLINE_STATUS, DxMODE_VLINE_ACK);
DxMODE_VLINE_ACK 3951 drivers/gpu/drm/radeon/r600.c 		WREG32(D2MODE_VLINE_STATUS, DxMODE_VLINE_ACK);