Two Different Codecs on 1 SAI for the IMX8M Plus EVK

[neuro]

Hello,

I have a custom board that has two different codecs (AK4458 & AK5558) that are fed into the imx8mp evk board. They are dac and adc respectively. 

I am able to record or play these chips with the evk board individually (loading a device tree that only has 1 codec enabled) but NOT simultaneously on the sai3. 

I want to be able to simultaneously run both chips on the SAI3. 

I have setup my own device tree that includes imx8mp-evk.dts as shown:

/dts-v1/;

#include "imx8mp-evk.dts"

/ {
        /delete-node/sound-wm8960;
        sound-ak4458 {
                compatible = "fsl,imx-audio-ak4458";
                model = "ak4458-audio";
                audio-cpu = <&sai3>;
                audio-codec = <&ak4458>;
                fsl,tdm;
        };

        sound-ak5558_1 {
                compatible = "fsl,imx-audio-ak5558";
                model = "ak5558-mic1";
                audio-cpu = <&sai3>;
                audio-codec = <&ak5558_1>;
                status = "okay";
                fsl,tdm;
        };
};

&i2c3 {

        ak5558_1: ak5558@10 {
                model = "ak5558-aif";
                compatible = "asahi-kasei,ak5558";
                reg = <0x10>;
        };

        ak4458: ak4458@12 {
                compatible = "asahi-kasei,ak4458";
                reg = <0x12>;
        };

};

I've commented out these lines in the soc-core.c driver in order to load the codecs simultaneously. if i didn't comment out the code, it wont accept the second chip driver and would say the sound card is already in use.

static int soc_probe_component(struct snd_soc_card *card,
                               struct snd_soc_component *component)
{
        struct snd_soc_dapm_context *dapm =
                snd_soc_component_get_dapm(component);
        struct snd_soc_dai *dai;
        int ret;

        if (!strcmp(component->name, "snd-soc-dummy"))
                return 0;
/*
        if (component->card) {
                if (component->card != card) {
                        dev_err(component->dev,
                                "Trying to bind component to card \"%s\" but is already bound to card \"%s\"\n",
                                card->name, component->card->name);
                        return -ENODEV;
                }
                return 0;
        }
*/

While the two are shown in alsa (arecord -l and aplay -l) simultaneously, im only able to play out the ak4458 chip, however, when i record with the ak5558 chip, it runs but it hangs the system. 

Is it possible to run these two different codecs on 1 sai? 

**I have attempted to do a simple-audio-card setup in the device tree but so far the driver fails (coredump) if a second codec is loaded. 

Thank you!

[Bio_TICFSL]

Hello,

Sorry, you can't use two codecs on the same SAI, the dtb is ok but you are using the same SAI you can probe with different SAI.

Regards