i.MX Processorsのトピック回复： imx8mp adau1761 audio codec driver error

imx8mp adau1761 audio codec driver error

HelloMather — Thu, 09 Nov 2023 04:18:32 GMT

在调试adau1761时，驱动正常加载上去，但aplay a.wav时，总是报

_____________________________

aplay /usr/share/sounds/alsa/key.wav
ALSA lib ../../../alsa-lib-1.1.9/src/pcm/pcm_direct.c:1271:(snd1_pcm_direct_initialize_slave) unable to install hw params
ALSA lib ../../../alsa-lib-1.1.9/src/pcm/pcm_dmix.c:1120:(snd_pcm_dmix_open) unable to initialize slave
aplay: main:828: audio open error: Invalid argument

____________________________

dmesg 后kernel 报错如下，

[ 386.622136] fsl-sai 30c30000.sai: id 0, rate:0HZ, freq 11289600hz
[ 386.628252] fsl-sai 30c30000.sai: id 1, rate:12288000HZ, freq 11289600hz
[ 386.635008] fsl-sai 30c30000.sai: id 2, rate:0HZ, freq 11289600hz
[ 386.641160] fsl-sai 30c30000.sai: id 3, rate:0HZ, freq 11289600hz
[ 386.647289] fsl-sai 30c30000.sai: failed to derive required Tx rate: 11289600
[ 386.654465] fsl-sai 30c30000.sai: ASoC: can't set 30c30000.sai hw params: -22

————————————————
错误提示，跟进源码中，发现在函数：

static int fsl_sai_set_bclk(struct snd_soc_dai *dai, bool tx, u32 freq)
{
   struct fsl_sai *sai = snd_soc_dai_get_drvdata(dai);
   unsigned char offset = sai->soc->reg_offset;
   unsigned long clk_rate;
   unsigned int reg = 0;
   u32 ratio, savesub = freq, saveratio = 0, savediv = 0;
   u32 id;
   int ret = 0;

   /* Don't apply to slave mode */
   if (sai->slave_mode[tx])
       return 0;

    fsl_sai_check_ver(dai);
    for (id = 0; id < FSL_SAI_MCLK_MAX; id++)
   {
       clk_rate = clk_get_rate(sai->mclk_clk[id]);

if (!clk_rate)continue;

ratio = clk_rate / freq;
ret = clk_rate - ratio * freq;

       /*
       * Drop the source that can not be
       * divided into the required rate.
       */
       if (ret != 0 && clk_rate / ret < 1000) //
           continue;

       if ((ratio % 2 == 0 && ratio >= 2 && ratio <= 512) ||(ratio == 1 && sai->verid.id >= FSL_SAI_VERID_0301))
       {
printk("fsl_sai_set_bclk line:%d \n",__LINE__);
           if (ret < savesub) {
saveratio = ratio;
               sai->mclk_id[tx] = id;
               savesub = ret;
           }
if (ret == 0)
               break;
       }
   }

   if (saveratio == 0) {
dev_err(dai->dev, "failed to derive required %cx rate: %d\n",tx ? 'T' : 'R', freq);
       return -EINVAL;
   }

中

if (ret != 0 && clk_rate / ret < 1000)
continue;

我的dts配置如下，

&sai3 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_sai3>;
assigned-clocks = <&clk IMX8MP_CLK_SAI3>;
assigned-clock-parents = <&clk IMX8MP_AUDIO_PLL1_OUT>;
assigned-clock-rates = <12288000>;
clocks = <&audiomix_clk IMX8MP_CLK_AUDIOMIX_SAI3_IPG>, <&clk IMX8MP_CLK_DUMMY>,
<&audiomix_clk IMX8MP_CLK_AUDIOMIX_SAI3_MCLK1>, <&clk IMX8MP_CLK_DUMMY>,
<&clk IMX8MP_CLK_DUMMY>;
clock-names = "bus", "mclk0", "mclk1", "mclk2", "mclk3";
fsl,sai-mclk-direction-output;
#sound-dai-cells = <0>;
status = "okay";
};

sound-adau1761 {
compatible = "simple-audio-card";
simple-audio-card,name = "adau1761-audio";
simple-audio-card,format = "i2s";
simple-audio-card,bitclock-inversion;
simple-audio-card,frame-master = <&adaucpu>;
simple-audio-card,bitclock-master = <&adaucpu>;

adaucpu:simple-audio-card,cpu {
sound-dai = <&sai3>;
dai-tdm-slot-num = <8>;
dai-tdm-slot-width = <32>;
};

simple-audio-card,codec {
sound-dai = <&codec_1>;
};
};

非常感谢各位大佬能指出这个问题所在，先感谢各位了！

Re: imx8mp adau1761 audio codec driver error

HelloMather — Sat, 11 Nov 2023 09:15:45 GMT

@nxpfae

Re: imx8mp adau1761 audio codec driver error

jimmychan — Tue, 14 Nov 2023 07:31:44 GMT

You may take the device tree file of boards under "freescale" folder for reference.

e.g.

https://github.com/nxp-imx/linux-imx/blob/imx_5.4.70_2.3.0/arch/arm64/boot/dts/freescale/imx8mp-evk-sof-wm8960.dts

Re: imx8mp adau1761 audio codec driver error

HelloMather — Tue, 14 Nov 2023 12:56:49 GMT

Thank you for your replay.

But I think my dts configuration has not big problem because the kernel probe and device not has been generated successfully.

here is my dts changed,

adaucpu:simple-audio-card,cpu {
sound-dai = <&sai3>;
dai-tdm-slot-num = <8>;
dai-tdm-slot-width = <32>;
};

simple-audio-card,codec {
sound-dai = <&codec_1>;
};
};

回复： imx8mp adau1761 audio codec driver error

HelloMather — Tue, 14 Nov 2023 12:59:46 GMT

Is that any alsa configuration file that Must be config?

Re: imx8mp adau1761 audio codec driver error

jimmychan — Wed, 15 Nov 2023 02:36:52 GMT

Where is your codec_1?

Re: imx8mp adau1761 audio codec driver error

HelloMather — Tue, 28 Nov 2023 02:34:48 GMT

here is my i2c codec_1 dts node,

&i2c2 {

clock-frequency = <100000>;

pinctrl-names = "default";

pinctrl-0 = <&pinctrl_i2c2>;

status = "okay";

codec_1: adau1761@39 {

#sound-dai-cells = <0>;

compatible = "adi,adau1761";

reg = <0x39>;

clocks = <&audiomix_clk IMX8MP_CLK_AUDIOMIX_SAI3_MCLK1>;

clock-names = "mclk";

};