SCALER_DISPCTRL_DSP3_MUX_MASK
reg &= ~SCALER_DISPCTRL_DSP3_MUX_MASK;
ret = FIELD_GET(SCALER_DISPCTRL_DSP3_MUX_MASK, reg);
~SCALER_DISPCTRL_DSP3_MUX_MASK;
(reg & ~SCALER_DISPCTRL_DSP3_MUX_MASK) |