pub fn with_master_clock(self, mclk: impl PeripheralOutput<'d>) -> Self {
        let mclk = mclk.into();

        mclk.apply_output_config(&OutputConfig::default());
        mclk.set_output_enable(true);

        OutputSignal::CAM_CLK.connect_to(&mclk);

        self
    }
Configures the master clock (MCLK) pin for the camera interface.
esp-hal/src/lcd_cam/cam.rs