How to use SAI1 in master mode for IMX7D with Linux 4.14.98

asmaa — Thu, 30 Mar 2023 01:58:10 GMT

Hi All,

We are using imx7D for our prototype board and trying to interface with TLV320DAC3100.
We have connected SAI1 to the codec. I want to generate MCLK from SAI1. When the kernel boots, I can see the clock on the MCLK pin for 2 seconds, and then it turns off. Can somebody please verify if my device tree is right, and if not, how to correct it?

&sai1 { pinctrl-names = "default"; pinctrl-0 = <&pinctrl_sai1>; assigned-clocks = <&clks IMX7D_SAI1_ROOT_SRC>, <&clks IMX7D_SAI1_ROOT_CLK>; assigned-clock-parents = <&clks IMX7D_PLL_AUDIO_POST_DIV>; assigned-clock-rates = <0>, <24576000>; fsl,sai-mclk-direction-output; fsl,sai-synchronous-rx; status = "okay"; }; pinctrl_sai1: sai1grp { fsl,pins = < MX7D_PAD_SAI1_MCLK__SAI1_MCLK 0x1f MX7D_PAD_ENET1_RX_CLK__SAI1_TX_BCLK 0x1f MX7D_PAD_ENET1_CRS__SAI1_TX_SYNC 0x1f MX7D_PAD_ENET1_COL__SAI1_TX_DATA0 0x30 >; }; sound { compatible = "simple-audio-card"; simple-audio-card,name = "Audio Output"; simple-audio-card,format = "i2s"; simple-audio-card,bitclock-master = <&sound_codec>; simple-audio-card,frame-master = <&sound_codec>; simple-audio-card,widgets = "Headphone", "Headphone Jack", "Speaker", "speakerOut"; simple-audio-card,routing = "Headphone Jack", "HPL", "Headphone Jack", "HPR", "speakerOut", "SPK"; simple-audio-card,cpu { sound-dai = <&sai1>; }; sound_codec: simple-audio-card,codec { sound-dai = <&codec1>; clocks = <&clks IMX7D_SAI1_ROOT_SRC>; }; }; codec1: codec@18 { compatible = "ti,tlv320dac3100"; pinctrl-names = "default"; pinctrl-0 = <&pinctrl_codec1>; reg = <0x18>; #sound-dai-cells = <0>; HPVDD-supply = <&audio_3v3>; SPRVDD-supply = <&audio_3v3>; SPLVDD-supply = <&audio_3v3>; AVDD-supply = <&audio_3v3>; IOVDD-supply = <&audio_3v3>; DVDD-supply = <&audio_3v3>; gpio-reset = <&gpio6 12 GPIO_ACTIVE_HIGH>; status = "okay"; };

Re: How to use SAI1 in master mode for IMX7D with Linux 4.14.98

asmaa — Fri, 31 Mar 2023 02:54:04 GMT

Hi @joanxie

The first link is not working, and the second link discussed SAI1 in slave mode.
I want to make SAI1 work in master mode.

Could you please help me to make SAI1 work in master mode for IMX7D?

Thanks,

Asma

Re: How to use SAI1 in master mode for IMX7D with Linux 4.14.98

joanxie — Thu, 06 Apr 2023 08:34:14 GMT

the first link to remove " in the end, try again

https://community.nxp.com/t5/i-MX-Processors/iMX6UL-define-sai1-as-master/m-p/707120

topic How to use SAI1 in master mode for IMX7D with Linux 4.14.98 in i.MX Processors

How to use SAI1 in master mode for IMX7D with Linux 4.14.98

Re: How to use SAI1 in master mode for IMX7D with Linux 4.14.98

Re: How to use SAI1 in master mode for IMX7D with Linux 4.14.98

Re: How to use SAI1 in master mode for IMX7D with Linux 4.14.98