How to setup imx6qdl linux system for imx-dummy?

4060979 — Tue, 07 Apr 2020 11:45:19 GMT

Hi:

i want to use imx-dummy as the pcm interface for bluetooth, to record calls voice. the platform i use is imx6qdl linux system, imx6qdl is the slave mode, set as follow:

imx6qdl-sabresd.dtsi:

codec_dummy: codec_dummy {
compatible = "linux,snd-soc-dummy";
};

sound-dummy {
compatible = "fsl,imx-audio-dummy";
model = "imx-audio-dummy";
audio-cpu = <&ssi2>;
audio-codec = <&codec_dummy>;
mux-int-port = <2>;
mux-ext-port = <6>;
};

&ssi2 {
fsl,mode ="i2s-slave";
status = "okay";
};

pinctrl_audmux6: audmux6grp {
fsl,pins = <
MX6QDL_PAD_DI0_PIN4__AUD6_RXD 0x130b0 //PCM_OUT
MX6QDL_PAD_DI0_PIN2__AUD6_TXD 0x110b0 //PCM_IN
MX6QDL_PAD_DI0_PIN15__AUD6_TXC 0x130b0 //PCM_CLK
MX6QDL_PAD_DI0_PIN3__AUD6_TXFS 0x130b0 //PCM_SYNC
MX6QDL_PAD_DISP0_DAT6__AUD6_RXC 0x130b0 //PCM_CLK slave
MX6QDL_PAD_DISP0_DAT5__AUD6_RXFS 0x130b0 //PCM_SYNC slave
>;
};

and the sound card 'imxaudiodummy' will be generate,

root@Freescale_iMX6 /mnt/nfs# cat /proc/asound/cards
0 [imxaudiodummy ]: imx-audio-dummy - imx-audio-dummy
imx-audio-dummy
1 [imxaudiosgtl500]: imx-audio-sgtl5 - imx-audio-sgtl5000
imx-audio-sgtl5000
2 [imxhdmisoc ]: imx-hdmi-soc - imx-hdmi-soc
imx-hdmi-soc

but use the command "arecord -D hw:0,0 -f S16_LE test.wav",When i call via bluetooth, BT module's PCM_CLK/PCM_SYNC/PCM_OUT all have signal output, but platform is not record.

How can i do? Is there a patch to support this requirement？

The imx-dummy.c file i used on imx6mq-evk android system.,is there are differents betwen?

Re: How to setup imx6qdl linux system for imx-dummy?

igorpadykov — Tue, 07 Apr 2020 23:59:26 GMT

Hi Haibo

one can look at

[alsa-devel] Imx6 i2s master driver without i2c

Best regards
igor
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Re: How to setup imx6qdl linux system for imx-dummy?

4060979 — Thu, 09 Apr 2020 10:17:28 GMT

Could you provide the corresponding imx-dummy.c file for imx6qdl platform？

I don't know if the file used now is correct.

topic Re: How to setup imx6qdl linux system for imx-dummy? in i.MX Processors

How to setup imx6qdl linux system for imx-dummy?

Re: How to setup imx6qdl linux system for imx-dummy?

Re: How to setup imx6qdl linux system for imx-dummy?