Hello all,
I am attempting to get an I2S device working using SAI7 on the 8MPLUSEVK. I have confirmed that I have everything hooked up propery by using the /sys/class/gpio/ sysfs method and I could see the correct lines toggle. I can see the I2C working, however it always fails due not not having MCLK running at the time.
Here is my device tree:
/dts-v1/;
#include "imx8mp-evk.dts"
/ {
sound-wm8960 {
status = "disabled";
};
sound-micfil {
status = "disabled";
};
sound-xcvr {
status = "disabled";
};
sound-ssm2518 {
compatible = "simple-audio-card";
simple-audio-card,name = "ssm2518-audio";
simple-audio-card,format = "i2s";
simple-audio-card,frame-master = <&cpudai>;
simple-audio-card,bitclock-master = <&cpudai>;
simple-audio-card,mclk-fs = <256>;
simple-audio-card,widgets =
"Speaker", "Speakers";
simple-audio-card,routing =
"Speakers", "OUTL",
"Speakers", "OUTR";
status = "okay";
cpudai: simple-audio-card,cpu {
sound-dai = <&sai7>;
};
simple-audio-card,codec {
sound-dai = <&ssm2518_i2c>;
clocks = <&audio_blk_ctrl IMX8MP_CLK_AUDIO_BLK_CTRL_SAI7_MCLK1>;
};
};
};
&i2c3 {
clock-frequency = <100000>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_i2c3>;
status = "okay";
codec: wm8960@1a {
status = "disabled";
};
ssm2518_i2c: ssm2518@34 {
#sound-dai-cells = <0>;
status = "okay";
compatible = "adi,ssm2518";
reg = <0x34>;
clocks = <&audio_blk_ctrl IMX8MP_CLK_AUDIO_BLK_CTRL_SAI7_MCLK1>;
clock-names = "mclk";
assigned-clocks = <&audio_blk_ctrl IMX8MP_CLK_AUDIO_BLK_CTRL_SAI7_MCLK1>;
assigned-clock-rates = <12288000>;
};
};
&uart3 {
status = "disabled";
};
&ecspi2 {
status = "disabled";
};
&sai2 {
status = "disabled";
};
&sai3 {
status = "disabled";
};
&xcvr {
status = "disabled";
};
&sai7 {
#sound-dai-cells = <0>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_sai7>;
assigned-clocks = <&clk IMX8MP_CLK_SAI7>;
assigned-clock-parents = <&clk IMX8MP_AUDIO_PLL1_OUT>;
assigned-clock-rates = <12288000>;
clocks = <&audio_blk_ctrl IMX8MP_CLK_AUDIO_BLK_CTRL_SAI7_IPG>, <&clk IMX8MP_CLK_DUMMY>,
<&audio_blk_ctrl IMX8MP_CLK_AUDIO_BLK_CTRL_SAI7_MCLK1>, <&clk IMX8MP_CLK_DUMMY>,
<&clk IMX8MP_CLK_DUMMY>, <&clk IMX8MP_AUDIO_PLL1_OUT>, <&clk IMX8MP_AUDIO_PLL2_OUT>;
clock-names = "bus", "mclk0", "mclk1", "mclk2", "mclk3", "pll8k", "pll11k";
fsl,sai-mclk-direction-output;
fsl,sai-asynchronous;
status = "okay";
};
&iomuxc {
pinctrl_sai7: sai7grp {
fsl,pins = <
MX8MP_IOMUXC_ECSPI1_SS0__AUDIOMIX_SAI7_TX_SYNC 0xd6
MX8MP_IOMUXC_ECSPI2_SCLK__AUDIOMIX_SAI7_TX_BCLK 0xd6
MX8MP_IOMUXC_ECSPI2_MOSI__AUDIOMIX_SAI7_TX_DATA00 0xd6
MX8MP_IOMUXC_ECSPI2_MISO__AUDIOMIX_SAI7_MCLK 0xd6
>;
};
};
At this point I am out of ideas. I have tried all sorts of combinations of different clock settings in the sound device, I2C, and SAI configurations and nothing seems to give any effect.
I found the following threads and tried all the suggestions there:
I can see that the clock rates are set properly though the clk_summary:
root@imx8mpevk:~# cat /sys/kernel/debug/clk/clk_summary | grep -i sai7
sai7_mclk 0 0 0 0 0 0 50000
sai7_mclk3_clk 0 0 0 49152000 0 0 50000
sai7_mclk2_sel 0 0 0 24000000 0 0 50000
sai7_mclk2_clk 0 0 0 24000000 0 0 50000
sai7_ipg_clk 0 0 0 400000000 0 0 50000
sai7 0 0 0 12288000 0 0 50000
sai7_root 0 0 0 12288000 0 0 50000
sai7_mclk1_sel 0 0 0 12288000 0 0 50000
sai7_mclk1_clk 0 0 0 12288000 0 0 50000
audio_pll1_ref_sel 0 0 0 24000000 0 0 50000
audio_pll1 0 0 0 393216000 0 0 50000
audio_pll1_bypass 0 0 0 393216000 0 0 50000
audio_pll1_out 0 0 0 393216000 0 0 50000
root@imx8mpevk:~#
Any ideas or hints?
Thank you,
Chris
