Hi,
I am trying to use wm8731 codec with i.MX6UL.
The wm8731 codec is on a MIKROE-506 proto board and is wired this way for the SAI part :
imx6ul <=> MIKROE-506 <=> wm8731
CSI_D6 (SAI1_RX_DATA) MISO ADCDAT
CSI_D2 (SAI1_RX_SYNC) ADCL ADCLRC
CSI_D3 (SAI1_RX_BCLK) SCK BCLK
CSI_D7 (SAI1_TX_DATA) MOSI DACDAT
CSI_D4 (SAI1_TX_SYNC) DACL DACLRC
CSI_D1 (SAI1_MCLK) SCK BCLK
The I2C wiring is OK, I am able to send control command to the codec, for example I can make a loop between microphone and HP with amixer.
I'm using linux 4.8.10 and the here is the relevant parts of the device tree :
sound {
compatible = "simple-audio-card";
simple-audio-card,model = "wm8731-audio";
simple-audio-card,format = "i2s";
simple-audio-card,audio-routing =
"Line Out", "LOUT",
"Line Out", "ROUT",
"Headphone Jack", "RHPOUT",
"Headphone Jack", "LHPOUT",
"LLINEIN","Line In",
"RLINEIN","Line In";
simple-audio-card,cpu {
sound-dai = <&sai1>;
bitclock-master;
frame-master;
};
simple-audio-card,codec {
sound-dai = <&codec>;
};
};
&sai1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_sai1>;
assigned-clocks = <&clks IMX6UL_CLK_SAI1_SEL>,<&clks IMX6UL_CLK_SAI1>;
assigned-clock-parents = <&clks IMX6UL_CLK_PLL4_AUDIO_DIV>;
assigned-clock-rates = <0>,<12288000>,<11289600>;
status = "okay";
};
&i2c1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_i2c1>;
clock_frequency = <400000>;
status = "okay";
};
pinctrl_sai1: sai1grp {
fsl,pins = <
MX6UL_PAD_CSI_DATA05__SAI1_TX_BCLK 0x17088
MX6UL_PAD_CSI_DATA03__SAI1_RX_BCLK 0x17088
MX6UL_PAD_CSI_DATA04__SAI1_TX_SYNC 0x17088
MX6UL_PAD_CSI_DATA02__SAI1_RX_SYNC 0x17088
MX6UL_PAD_CSI_DATA07__SAI1_TX_DATA 0x11088
MX6UL_PAD_CSI_DATA06__SAI1_RX_DATA 0x11088
MX6UL_PAD_JTAG_TMS__CCM_CLKO1 0x17088
>;
};
When trying to play a sound with aplay, I can hear the codec sending some kind of noise during aplay execution but nothing related with the sound I am trying to play.
I am really not sure with the sai1grp part of the device tree.
Any help will be really appreciated.
Regards
Yann
