SAI Interface as I2S Master and Slave in i.MX8MM EVK

[sreedhar_appala]

Hi,

I am working with IMX8M Mini EVK and yocto project build details:

Build Configuration:
BB_VERSION = "1.38.0"
BUILD_SYS = "x86_64-linux"
NATIVELSBSTRING = "ubuntu-16.04"
TARGET_SYS = "aarch64-poky-linux"
MACHINE = "imx8mmevk"
DISTRO = "fsl-imx-xwayland"
DISTRO_VERSION = "4.14-sumo"
TUNE_FEATURES = "aarch64"
TARGET_FPU = ""

we want to configure SAI1 as Master for Playback (Tx Operation) and

SAI5 as Slave for Capture (Rx Operation)

We set the dai fmt in the machine driver for Playback (SAIx as master)

fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
                                       SND_SOC_DAIFMT_CBS_CFS;

and 

We set dai fmt in the machine driver for Capture (SAI5 as slave)

fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
                                       SND_SOC_DAIFMT_CBM_CFM;

I want to validate this on iMX8MM EVK hw, do you have any test code test this master and slave operation

Thank you,

Sreedhar

[igorpadykov]

Hi Sreedhar

for sai there are no simple tests like unit tests (imx-test - i.MX Driver Test Application Software),

one can try to test with aplay as described in

sect.7.1.2.4 Sound Card Information attached Linux Manual

or gstreamer using Linux 5.4.3_1.0.0 Documentation

Best regards
igor
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

[sreedhar_appala]

Thank you igor, I will check the documentation