imx6ull MQS Audio SAI1 programming

[user123412]

In the IMX6ULL Reference Guide MQS section: "The user needs to program SAI1 to output 2-channel MSB-16 bit active I2S signal, and then program the related IOMUXC_GPR2 bits."

How is SAI1 meant to be programmed for MQS? I ask because I am having an issue where the MQS PWM signals are turning on and off when playing audio, which causes the amplifier to make a popping noise. I am attempting to keep these signals always on at 50% duty cycle when audio is not being played to achieve the correct DC bias which should fix this popping. To do this, I believe I need to program the SAI1 signals. 

Thanks

[user123412]

Is it even possible to add a DC bias to eliminate MQS popping? I've been looking at fsl_mqs.c and fsl_sai.c drivers, but am having trouble figuring out how to achieve this.