[alsa-devel] Imx6 i2s master driver without i2c

[nick83ola]

Dear Alsa, Caleb and Arnaud

I need to output an i2s master stream from my IMX6 solo board

my board have this configuration for sound: (it have an sgtl5000 codec not
on module, but on dev board)

==========================================================================
sound {
        compatible = "fsl,imx6q-icore-sgtl5000",
                 "fsl,imx-audio-sgtl5000";
        model = "imx6q-icore-sgtl5000";
        ssi-controller = <&ssi1>;
        audio-codec = <&codec>;
        audio-routing =
           "MIC_IN", "Mic Jack",
            "Mic Jack", "Mic Bias",
            "Headphone Jack", "HP_OUT";
        mux-int-port = <2>;
        mux-ext-port = <4>;
    };
&ssi1 {
    fsl,mode = "i2s-master";
    status = "okay";
};

&audmux {
    pinctrl-names = "default";
    pinctrl-0 = <&pinctrl_audmux_4>;
    status = "okay";
};

&iomuxc {
    audmux {
        pinctrl_audmux_4: audmux-4 {
            fsl,pins = <
                MX6QDL_PAD_DISP0_DAT20__AUD4_TXC  0x130b0
                MX6QDL_PAD_DISP0_DAT21__AUD4_TXD 0x110b0
                MX6QDL_PAD_DISP0_DAT22__AUD4_TXFS  0x130b0
                MX6QDL_PAD_DISP0_DAT23__AUD4_RXD  0x130b0
            >;
       };
  };
==========================================================================

I need to output i2s on the same port as sgtl5000, bit in master mode
i've patched sound/soc/soc-utils.c to add support for dts as per arnaud
patch

==========================================================================
#ifdef CONFIG_OF
static const struct of_device_id soc_dummy_ids[] = {
    { .compatible = "linux,snd-soc-dummy", },
    { }
};
MODULE_DEVICE_TABLE(of, soc_dummy_ids);
#endif
...
.of_match_table = of_match_ptr(soc_dummy_ids),
==========================================================================

--> (it is necessary?????? or can I use simple audio card??????


-> i've put this in my dts file

==========================================================================
&audmux {
    ssi3 {
        fsl,audmux-port = <6>;
        fsl,port-config = <
             0x00000000
             IMX_AUDMUX_V2_PDCR_RXDSEL(4)
         >;
     };

     port5 {
         fsl,audmux-port = <4>;
         fsl,port-config = <
             (IMX_AUDMUX_V2_PTCR_TFSDIR |
             IMX_AUDMUX_V2_PTCR_TFSEL(6) |
             IMX_AUDMUX_V2_PTCR_TCLKDIR |
             IMX_AUDMUX_V2_PTCR_TCSEL(6))
             IMX_AUDMUX_V2_PDCR_RXDSEL(6)
         >;
     };
};

&ssi1 {
     status = "disabled";
};

&ssi2 {
     status = "disabled";
};

&ssi3 {
     status = "okay";
     #sound-dai-cells = <0>;
     // select the a clock parent suitable for 48000 Hz sampling rate
     assigned-clocks = <&clks IMX6QDL_CLK_SSI3_SEL>, <&clks
IMX6QDL_CLK_SSI3>;
     assigned-clock-parents = <&clks IMX6QDL_CLK_PLL4_AUDIO_DIV>;
     assigned-clock-rates = <0>, <49152000>;
};

/ {
    model = "Engicam i.CoreM6 DualLite/Solo starterkit";
    compatible = "fsl,imx6-icore", "fsl,imx6dl";

    sound{
     status = "disabled";
    };

    sound-itel {
        compatible = "simple-audio-card";
        simple-audio-card,name = "test";
        simple-audio-card,format="dsp_a";
        simple-audio-card,frame-master = <&sound2_ssi>;
        simple-audio-card,bitclock-master = <&sound2_ssi>;
        sound2_ssi: simple-audio-card,cpu {
            sound-dai = <&ssi3>;
            system-clock-frequency = <1536000>;
            dai-tdm-slot-num = <2>;
            dai-tdm-slot-width = <16>;
        };
    };
};
==========================================================================


here's my log

/sound-itel/simple-audio-card,cpu: arguments longer than property
asoc-simple-card sound-itel.31: parse error -22
asoc-simple-card: probe of sound-itel.31 failed with error -22












2016-05-06 17:38 GMT+02:00 Caleb Crome <caleb at crome.org>:

> Hi there,
>    Arnaud had a neat patch here that lets you set up a dummy sound
> card from the DTS.
>
>
> http://mailman.alsa-project.org/pipermail/alsa-devel/2015-November/100896.html
>
> With that patch, you can set up your DTS to simply start streaming, no
> codec or anything required, which should work for a codec with no I2C.
>
>
> Hope that helps,
>   -Caleb
>
>
> On Thu, May 5, 2016 at 12:56 PM, nick83ola <nick83ola at gmail.com> wrote:
> > Hello Alsa dev!
> >
> > Anyone have an example of an i2s only driver for imx6 solo? I need a
> driver
> > without i2c....
> > _______________________________________________
> > Alsa-devel mailing list
> > Alsa-devel at alsa-project.org
> > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
>



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