imx6q上移植wm8960，没有声音

[wrxw]

源代码是Yocto 4.1.15 ，codec是wm8960，移植后，可以正确识别wm8960

aplay -L也显示识别出wm8960，

但是使用aplay test.wav时报错：

ASoC: HiFi startup failed: -16
aplay: main:828: audio open error: Device or resource busy

然后源代码里加打印，报错是sound/soc/fsl/imx-wm8960.c里的imx_hifi_startup()返回-16

这里判断条件里的话，猜测是ssi总线上数据不对

然后示波器量了MCLK确实没有信号，AUD3_TCK，TFS,TXD,RTX均为低电平

查看设备树

采用默认的配置，引脚和实际电路图对应也是对的

查看codec的代码，clocks使用的是默认的169，换了201和别的值，还是一样

最后参考别的板子的，imx7d和imx6ul上的wm8960使用的都是sai总线，

而imx6qdl.dtsi里面只有ssi总线，设备树是从wm8962改的，8962使用ssi，是不是这里不对？

恳请有经验的大佬指导下下，谢谢

[weidong_sun]

Hi,

you can enable clock in clk-imx6q.c ( drivers/clk/imx/clk-imx6q.c) at first, then measure it to see if it is 24MHz

drivers/clk/imx/clk-imx6q.c

static void __init imx6q_clocks_init(struct device_node *ccm_node)

{

......

                imx_clk_set_parent(clk[IMX6QDL_CLK_CKO2_SEL], clk[IMX6QDL_CLK_OSC]);

                imx_clk_set_parent(clk[IMX6QDL_CLK_CKO], clk[IMX6QDL_CLK_CKO2]);

                clk_set_rate(clk[IMX6QDL_CLK_CKO], 24000000);

                imx_clk_prepare_enable(clk[IMX6QDL_CLK_CKO]);

... ...

}

Have a nice day!

NXP TIC weidong sun

[ericyang]

Hi Wigros，

I have the same problem on platform 6q. I found these things(below), but not  be solved.

WM8960 driver with SSI2 on Kernel 4.1.15 

https://community.nxp.com/message/642991?commentID=642991#comment-642991 

is there a patch for WM8960 that uses SSI?

Thanks.

[weidong_sun]

Hi Eric,

   You can't use imx-wm8960.c directly,  the best way is that you should refer to imx-wm8962.c and write a new machine driver for your application. Because imx-wm8960.c is used to connect SAI DAI to CODEC DAI.

-----------Chinese------

你最好不要直接使用imx-wm8960.c，因为这个machine driver是把SAI DAI和WM8960 DAI连接在一起的。最好的办法是在imx-wm8962.c的基础上，写一个自己的machine driver，你可以把它叫做imx6u-wm8960.c。定义方式和imx-wm8962.c基本一致。

-------------------------

Have a nice day!

NXP TIC weidong

[wrxw]

Hi

   Thanks ,  I modified it according to your steps and recompiled the kernel into the board.The MCLK pin successfully generated 24MHZ waveform.

   But run commond "aplay test.wav",system still error:

root@ubuntu:~# aplay test.wav
ASoC: HiFi startup failed: -16
aplay: main:828: audio open error: Device or resource busy

I measured the I2S pin：

AUD3_TCK AUD3_TFS AUD3_RXD is low

AUD3_TXD is high

Is wm8962 driver compatible with wm8960?

Thanks