Hello,
I am trying to configure SAI1 of the iMX7 to be used with an external codec.
Interesting part of my device tree is shown below:
sound {
compatible = "simple-audio-card";
status = "okay";
simple-audio-card,name = "My sound card";
simple-audio-card,format = "i2s";
clocks = <&clks IMX7D_AUDIO_MCLK_ROOT_CLK>;
assigned-clocks = <&clks IMX7D_AUDIO_MCLK_ROOT_SRC>,
<&clks IMX7D_AUDIO_MCLK_ROOT_CLK>;
assigned-clock-parents = <&clks IMX7D_PLL_AUDIO_POST_DIV>;
assigned-clock-rates = <0>, <24576000>;
mclk-fs = <512>;
simple-audio-card,cpu {
sound-dai = <&sai1>;
};
simple-audio-card,codec {
sound-dai = <&my_external_codec>;
};
};
...
&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>;
status = "okay";
};
I am trying to play a 48kHz audio file with aplay and it always fails with this error:
aplay: set_params:1403: Unable to install hw params:
Going deeper into the code, it seems the problem comes in clk.c:
That function is called when the DAI is configured:
ret = snd_soc_dai_set_sysclk(cpu_dai, 0, mclk,
SND_SOC_CLOCK_OUT);
The clk_calc_new_rates fails as "parent" is not defined when the function is called, and no callback are defined for the "derterminate_rate" and "round_rate" functions for the clock.
Kernel version is 4.14
I do not see what is wrong in my configuration, am i missing something?
Thanks for your help.
