PIPE_FRMTMSTMP
start_ts = intel_de_read(display, PIPE_FRMTMSTMP(crtc->pipe));
ret = poll_timeout_us(end_ts = intel_de_read(display, PIPE_FRMTMSTMP(crtc->pipe)),
PIPE_FRMTMSTMP(crtc->pipe));
PIPE_FRMTMSTMP(crtc->pipe));