How do I configure imx6q's I2S clock in master mode ?

[明镜明]

codec works in slave mode, ssi  generate the  sclk and  frame clock .

the sys's clock is 24M,  i follow  the nex table to configure registers :

Table 61-7. SSI Bit Clock and Frame Rate as a Function of PSR, PM, and DIV2. 

but  bit clock and  frame sync clock  dnot work correctly . 

how can i call  function imx_ssi_set_dai_clkdiv according to the sample_rate and sample_format？

Do you have relevant document or  demo to introduce  the configure ? 

[igorpadykov]

Hi 明镜 明

for frequency selection examples please refer to Chapter 7
Audio attached Linux Manual and unit tests:

imx-test (folder /mxc_sound_test)
www.nxp.com/lgfiles/NMG/MAD/YOCTO/imx-test-5.7.tar.gz

Best regards
igor
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[明镜明]

HI, igorpadykov

       thanks a lot. 

      there is no audio attached Linux manual in  imx-test-5.7.tar.gz.

      how  can i get the audio attached ?

      can you provide for me ?  

[igorpadykov]

sorry, it is ../mxc_sound_test, it is attached.

SDK (../drivers/audio)

swp-report/iMX6_Platform_SDK/sdk/drivers/audio at master · backenklee/swp-report · GitHub 

Best regards
igor

[明镜明]

HI,igorpadykov

Thanks a lot.

[明镜明]

HI,@igorpadykov

       Thank you for your answer.

       I  need to configure the i2s clock  in kernel ，not in  app。

      ssi  works in  master mode。

       how can i configur  the ssi‘s register according to  the sample rate and date format.

      in  machine driver (imx-sgtl5000.c)  。

    thanks a lot。

[igorpadykov]

I do not think that this is possible thorugh some simple

register settings using "imx_ssi_set_dai_clkdiv ", as alsa subsystem configures

it using own apis.

Please check attached in previous answer linux manual and

look at sources in Table 7-1. Stereo Codec SoC Driver Files

For better understanding probably may be useful to look at baremetal audio tests

Github SDK (/drivers/audio)
https://github.com/backenklee/swp-report/tree/master/iMX6_Platform_SDK

Best regards
igor