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ESAI Audio issue: Linux imx 3.10.17

Question asked by sharvari harisangam on May 3, 2016
Latest reply on May 18, 2016 by sharvari harisangam


  I am working on a custom board based on sabre auto board.  I am using linux-imx 3.10.17. I have to use ESAI for audio. I am writing a dummy driver which basically registers the soc card (which can then be used in ALSA utilities) and sets the hw params.

Now i have observed that other drivers use following functions in their code

snd_soc_dai_set_tdm_slot() and  snd_soc_dai_set_sysclk(). If i am using normal mode(i2s)( not TDM) ,then do i require to use snd_soc_dai_set_tdm_slot() function in my driver?

What is the exact purpose of these functions? What exactly do they do?


I wish to use imx pll4 clock for ESAI. For that, what configuration is needed?

Also  I want to set ESAI in master mode. What configuration is needed for that? Do I have to add anything in ESAI block in device tree?



Sharvari Harisangam