https://community.nxp.com/t5/i-MX-Processors/imx8qxp-spdif-use-error/m-p/1250924#M171341 <P class="md-end-block md-p"><SPAN class="md-plain md-expand">Hi</SPAN></P><P class="md-end-block md-p"><SPAN class="md-plain md-expand">CPU：imx8qx6avlf</SPAN></P><P class="md-end-block md-p"><SPAN class="md-plain">SDK：Android Q10.0.0_2.2.0_AUTO</SPAN></P><P class="md-end-block md-p"><SPAN class="md-plain">lunch mek_8q_car_userdebug</SPAN></P><P class="md-end-block md-p"><SPAN class="md-plain">I don’t know much about alsa, now refer to imx8qxp-lpddr4-val-spdif.dts to modify.</SPAN></P><P class="md-end-block md-p md-focus"><SPAN class="md-plain md-expand">devic-tree</SPAN></P><LI-CODE lang="c">sound-spdif { compatible = "fsl,imx-audio-spdif"; model = "imx-spdif"; spdif-controller = &lt;&amp;spdif0&gt;; spdif-in; spdif-out; };</LI-CODE><P><SPAN>driver：vendor/nxp-opensource/kernel_imx/sound/soc/fsl/fsl_spdif.c</SPAN></P><P><SPAN>Test steps：</SPAN></P><LI-CODE lang="c">mek_8q:/ # cat /proc/asound/cards 0 [imxspdif ]: imx-spdif - imx-spdif imx-spdif mek_8q:/ # ls dev/snd -l total 0 crw-rw---- 1 system audio 116, 4 1970-01-01 00:00 controlC0 crw-rw---- 1 system audio 116, 3 1970-01-01 00:00 pcmC0D0c crw-rw---- 1 system audio 116, 2 1970-01-01 00:00 pcmC0D0p crw-rw---- 1 system audio 116, 33 1970-01-01 00:00 timer mek_8q:/ # mek_8q:/ # tinypcminfo -D 0 -d 0 Info for card 0, device 0: PCM out: Access: 0x000009 Format[0]: 0x000040 Format[1]: 00000000 Format Name: S24_LE Subformat: 0x000001 Rate: min=32000Hz max=192000Hz Channels: min=2 max=2 Sample bits: min=32 max=32 Period size: min=32 max=8192 Period count: min=2 max=2048 PCM in: Access: 0x000009 Format[0]: 0x000040 Format[1]: 00000000 Format Name: S24_LE Subformat: 0x000001 Rate: min=16000Hz max=192000Hz Channels: min=2 max=2 Sample bits: min=32 max=32 Period size: min=32 max=8192 Period count: min=2 max=2048 mek_8q:/ # mek_8q:/ # tinyplay /sdcard/1khz-48000-32-2.wav -p 1024 -r 3 Unable to open PCM device 0 (cannot set hw params: Invalid argument) mek_8q:/ #</LI-CODE><P>error log</P><LI-CODE lang="c">Unable to open PCM device 0 (cannot set hw params: Invalid argument)</LI-CODE> Wed, 24 Mar 2021 06:41:21 GMT relax-wu 2021-03-24T06:41:21Z https://community.nxp.com/t5/i-MX-Processors/imx8qxp-spdif-use-error/m-p/1250924#M171341 <P class="md-end-block md-p"><SPAN class="md-plain md-expand">Hi</SPAN></P><P class="md-end-block md-p"><SPAN class="md-plain md-expand">CPU：imx8qx6avlf</SPAN></P><P class="md-end-block md-p"><SPAN class="md-plain">SDK：Android Q10.0.0_2.2.0_AUTO</SPAN></P><P class="md-end-block md-p"><SPAN class="md-plain">lunch mek_8q_car_userdebug</SPAN></P><P class="md-end-block md-p"><SPAN class="md-plain">I don’t know much about alsa, now refer to imx8qxp-lpddr4-val-spdif.dts to modify.</SPAN></P><P class="md-end-block md-p md-focus"><SPAN class="md-plain md-expand">devic-tree</SPAN></P><LI-CODE lang="c">sound-spdif { compatible = "fsl,imx-audio-spdif"; model = "imx-spdif"; spdif-controller = &lt;&amp;spdif0&gt;; spdif-in; spdif-out; };</LI-CODE><P><SPAN>driver：vendor/nxp-opensource/kernel_imx/sound/soc/fsl/fsl_spdif.c</SPAN></P><P><SPAN>Test steps：</SPAN></P><LI-CODE lang="c">mek_8q:/ # cat /proc/asound/cards 0 [imxspdif ]: imx-spdif - imx-spdif imx-spdif mek_8q:/ # ls dev/snd -l total 0 crw-rw---- 1 system audio 116, 4 1970-01-01 00:00 controlC0 crw-rw---- 1 system audio 116, 3 1970-01-01 00:00 pcmC0D0c crw-rw---- 1 system audio 116, 2 1970-01-01 00:00 pcmC0D0p crw-rw---- 1 system audio 116, 33 1970-01-01 00:00 timer mek_8q:/ # mek_8q:/ # tinypcminfo -D 0 -d 0 Info for card 0, device 0: PCM out: Access: 0x000009 Format[0]: 0x000040 Format[1]: 00000000 Format Name: S24_LE Subformat: 0x000001 Rate: min=32000Hz max=192000Hz Channels: min=2 max=2 Sample bits: min=32 max=32 Period size: min=32 max=8192 Period count: min=2 max=2048 PCM in: Access: 0x000009 Format[0]: 0x000040 Format[1]: 00000000 Format Name: S24_LE Subformat: 0x000001 Rate: min=16000Hz max=192000Hz Channels: min=2 max=2 Sample bits: min=32 max=32 Period size: min=32 max=8192 Period count: min=2 max=2048 mek_8q:/ # mek_8q:/ # tinyplay /sdcard/1khz-48000-32-2.wav -p 1024 -r 3 Unable to open PCM device 0 (cannot set hw params: Invalid argument) mek_8q:/ #</LI-CODE><P>error log</P><LI-CODE lang="c">Unable to open PCM device 0 (cannot set hw params: Invalid argument)</LI-CODE> Wed, 24 Mar 2021 06:41:21 GMT https://community.nxp.com/t5/i-MX-Processors/imx8qxp-spdif-use-error/m-p/1250924#M171341 relax-wu 2021-03-24T06:41:21Z https://community.nxp.com/t5/i-MX-Processors/imx8qxp-spdif-use-error/m-p/1250985#M171350 <P>Hi relax-wu</P> <P>&nbsp;</P> <P>supported interfaces are described in Android Release Notes, per this document seems spdif</P> <P>is not supported, sorry. One can try to test it in linux:</P> <P><A href="https://www.nxp.com/design/software/embedded-software/i-mx-software/embedded-linux-for-i-mx-applications-processors:IMXLINUX?tab=In-Depth_Tab" target="_blank">https://www.nxp.com/design/software/embedded-software/i-mx-software/embedded-linux-for-i-mx-applications-processors:IMXLINUX?tab=In-Depth_Tab</A></P> <P>&nbsp;</P> <P>Best regards<BR />igor</P> Wed, 24 Mar 2021 07:50:34 GMT https://community.nxp.com/t5/i-MX-Processors/imx8qxp-spdif-use-error/m-p/1250985#M171350 igorpadykov 2021-03-24T07:50:34Z https://community.nxp.com/t5/i-MX-Processors/imx8qxp-spdif-use-error/m-p/1261652#M172550 <P>Has not yet reached the Android layer<BR />Tinyplay operates the Linux driver directly, this step is a failure.</P> Wed, 14 Apr 2021 03:27:18 GMT https://community.nxp.com/t5/i-MX-Processors/imx8qxp-spdif-use-error/m-p/1261652#M172550 relax-wu 2021-04-14T03:27:18Z https://community.nxp.com/t5/i-MX-Processors/imx8qxp-spdif-use-error/m-p/1266216#M173010 <P>This is the solution</P> Thu, 22 Apr 2021 01:31:38 GMT https://community.nxp.com/t5/i-MX-Processors/imx8qxp-spdif-use-error/m-p/1266216#M173010 relax-wu 2021-04-22T01:31:38Z