DP_ESTIMATED_BW
DPTUN_REG(DP_ESTIMATED_BW) | \
if (drm_dp_dpcd_read_byte(tunnel->aux, DP_ESTIMATED_BW, &val) < 0)
if (tunnel_reg(regs, DP_ALLOCATED_BW) > tunnel_reg(regs, DP_ESTIMATED_BW)) {
DPTUN_BW_ARG(tunnel_reg(regs, DP_ESTIMATED_BW) *
tunnel->estimated_bw = tunnel_reg(regs, DP_ESTIMATED_BW) * tunnel->bw_granularity;