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@xxxxxxxxx>:
> 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@xxxxxxxxx> 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@xxxxxxxxxxxxxxxx
> > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
>
--
P.S. Le informazioni trasmesse attraverso la presente comunicazione sono di
esclusiva
spettanza dell'effettivo destinatario. Nel caso in cui le stesse
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immediata
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destinatari
della presente comunicazione e dei dati contenuti negli allegati, possono
essere
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196/2003, sia ai
sensi dell'art. 616 del Codice Penale che disciplina la violazione del
segreto sulla
corrispondenza.
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