TEGRA_CEC_HW_CONTROL
cec_write(cec, TEGRA_CEC_HW_CONTROL, 0);
cec_write(cec, TEGRA_CEC_HW_CONTROL, TEGRA_CEC_HWCTRL_TX_RX_MODE);
u32 state = cec_read(cec, TEGRA_CEC_HW_CONTROL);
cec_write(cec, TEGRA_CEC_HW_CONTROL, state);
u32 reg = cec_read(cec, TEGRA_CEC_HW_CONTROL);
cec_write(cec, TEGRA_CEC_HW_CONTROL, reg);
hw_ctrl = cec_read(cec, TEGRA_CEC_HW_CONTROL);
cec_write(cec, TEGRA_CEC_HW_CONTROL, 0);
cec_write(cec, TEGRA_CEC_HW_CONTROL, hw_ctrl);