i.MX Processors中的主题 Understanding audio routing in linux for wm8985 https://community.nxp.com/t5/i-MX-Processors/Understanding-audio-routing-in-linux-for-wm8985/m-p/741136#M115329 <HTML><HEAD></HEAD><BODY><P style="color: #242729; background-color: #ffffff; border: 0px; margin: 0px 0px 1em;">I have a custom i.MX6 board which has WM8985 audio codec. I have the codec driver wm8985 in sound/soc/codecs folder. I am developing the machine level driver sound/soc/fsl/imx-wm8985.c</P><P style="border: 0px; margin: 0px 0px 1em;">I am taking the wm8962 code as reference. I am unable to understand the audio routing concept in linux audio subsystem.</P><P style="color: #242729; background-color: #ffffff; border: 0px; margin: 0px 0px 1em;">I have modified the device tree to the following looking at wm8962 device tree.</P><P style="color: #242729; background-color: #ffffff; border: 0px; margin: 0px 0px 1em;"></P><PRE style="background-color: #eff0f1; border: 0px; font-size: 13px; margin: 0px 0px 1em; padding: 5px;"><CODE style="background-color: #eff0f1; border: 0px; font-weight: inherit; font-size: 13px; margin: 0px;">sound {&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; compatible = "fsl,imx6q-sabresd-wm8985",&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; "fsl,imx-audio-wm8985";&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; model = "wm8985-audio";&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; cpu-dai = &lt;&amp;ssi2&gt;;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; audio-codec = &lt;&amp;codec&gt;;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; audio-routing =&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; "Headphone Jack", "HPL",&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; "Headphone Jack", "HPR",&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; "Ext Spk", "SPKL",&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; "Ext Spk", "SPKR",&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; "Mic Bias", "AMIC",&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; "RIN", "Mic Bias",&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; "DMIC", "Mic Bias",&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; "DMICDAT", "DMIC";&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; mux-int-port = &lt;2&gt;;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; mux-ext-port = &lt;3&gt;;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; hp-det-gpios = &lt;&amp;gpio7 8 1&gt;; /* same as sabre */&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; /*mic-det-gpios = &lt;&amp;gpio1 23 1&gt;;*/ /* move to enet_ref_clk */&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; };</CODE></PRE><P></P><P style="color: #242729; background-color: #ffffff; border: 0px; margin: 0px 0px 1em;">Is this correct. Can you please help me to understanding what does the source and sink means in this. How to make a route..</P><P style="color: #242729; background-color: #ffffff; border: 0px; margin: 0px 0px 1em;"><IMG alt="enter image description here" src="https://i.stack.imgur.com/ASuBH.png" /></P><DIV class="" style="border: 0px; margin: 0px 0px 5px;"><P style="border: 0px; font-weight: inherit; font-size: inherit; margin: 0px 0px 1em;">Running aplay, i am getting Read/Write Error which happens due to incorrect routing..</P></DIV></BODY></HTML> Wed, 14 Feb 2018 04:29:28 GMT jamalmohiuddin 2018-02-14T04:29:28Z Understanding audio routing in linux for wm8985 https://community.nxp.com/t5/i-MX-Processors/Understanding-audio-routing-in-linux-for-wm8985/m-p/741136#M115329 <HTML><HEAD></HEAD><BODY><P style="color: #242729; background-color: #ffffff; border: 0px; margin: 0px 0px 1em;">I have a custom i.MX6 board which has WM8985 audio codec. I have the codec driver wm8985 in sound/soc/codecs folder. I am developing the machine level driver sound/soc/fsl/imx-wm8985.c</P><P style="border: 0px; margin: 0px 0px 1em;">I am taking the wm8962 code as reference. I am unable to understand the audio routing concept in linux audio subsystem.</P><P style="color: #242729; background-color: #ffffff; border: 0px; margin: 0px 0px 1em;">I have modified the device tree to the following looking at wm8962 device tree.</P><P style="color: #242729; background-color: #ffffff; border: 0px; margin: 0px 0px 1em;"></P><PRE style="background-color: #eff0f1; border: 0px; font-size: 13px; margin: 0px 0px 1em; padding: 5px;"><CODE style="background-color: #eff0f1; border: 0px; font-weight: inherit; font-size: 13px; margin: 0px;">sound {&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; compatible = "fsl,imx6q-sabresd-wm8985",&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; "fsl,imx-audio-wm8985";&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; model = "wm8985-audio";&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; cpu-dai = &lt;&amp;ssi2&gt;;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; audio-codec = &lt;&amp;codec&gt;;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; audio-routing =&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; "Headphone Jack", "HPL",&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; "Headphone Jack", "HPR",&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; "Ext Spk", "SPKL",&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; "Ext Spk", "SPKR",&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; "Mic Bias", "AMIC",&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; "RIN", "Mic Bias",&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; "DMIC", "Mic Bias",&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; "DMICDAT", "DMIC";&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; mux-int-port = &lt;2&gt;;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; mux-ext-port = &lt;3&gt;;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; hp-det-gpios = &lt;&amp;gpio7 8 1&gt;; /* same as sabre */&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; /*mic-det-gpios = &lt;&amp;gpio1 23 1&gt;;*/ /* move to enet_ref_clk */&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; };</CODE></PRE><P></P><P style="color: #242729; background-color: #ffffff; border: 0px; margin: 0px 0px 1em;">Is this correct. Can you please help me to understanding what does the source and sink means in this. How to make a route..</P><P style="color: #242729; background-color: #ffffff; border: 0px; margin: 0px 0px 1em;"><IMG alt="enter image description here" src="https://i.stack.imgur.com/ASuBH.png" /></P><DIV class="" style="border: 0px; margin: 0px 0px 5px;"><P style="border: 0px; font-weight: inherit; font-size: inherit; margin: 0px 0px 1em;">Running aplay, i am getting Read/Write Error which happens due to incorrect routing..</P></DIV></BODY></HTML> Wed, 14 Feb 2018 04:29:28 GMT https://community.nxp.com/t5/i-MX-Processors/Understanding-audio-routing-in-linux-for-wm8985/m-p/741136#M115329 jamalmohiuddin 2018-02-14T04:29:28Z Re: Understanding audio routing in linux for wm8985 https://community.nxp.com/t5/i-MX-Processors/Understanding-audio-routing-in-linux-for-wm8985/m-p/741137#M115330 <HTML><HEAD></HEAD><BODY><P>Hi Jamal</P><P></P><P>for source and sink routing one can refer to documentation in</P><P>linux/Documentation/devicetree/bindings/sound/imx-audio-wm8962.txt</P><P><A class="link-titled" href="http://git.freescale.com/git/cgit.cgi/imx/linux-imx.git/tree/Documentation/devicetree/bindings/sound/imx-audio-wm8962.txt?h=imx_4.9.11_1.0.0_ga" title="http://git.freescale.com/git/cgit.cgi/imx/linux-imx.git/tree/Documentation/devicetree/bindings/sound/imx-audio-wm8962.txt?h=imx_4.9.11_1.0.0_ga">linux-imx.git - i.MX Linux Kernel</A>&nbsp;</P><P>and Chapter 7 Audio attached Linux Manual, alsa project online documentation</P><P><A class="link-titled" href="http://www.alsa-project.org/main/index.php/ALSA_Driver_Documentation" title="http://www.alsa-project.org/main/index.php/ALSA_Driver_Documentation">ALSA Driver Documentation - AlsaProject</A>&nbsp;<BR /><A class="link-titled" href="https://www.alsa-project.org/main/index.php/Tutorials_and_Presentations" title="https://www.alsa-project.org/main/index.php/Tutorials_and_Presentations">https://www.alsa-project.org/main/index.php/Tutorials_and_Presentations</A>&nbsp;</P><P></P><P>Best regards<BR />igor<BR />-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Wed, 14 Feb 2018 06:19:42 GMT https://community.nxp.com/t5/i-MX-Processors/Understanding-audio-routing-in-linux-for-wm8985/m-p/741137#M115330 igorpadykov 2018-02-14T06:19:42Z Re: Understanding audio routing in linux for wm8985 https://community.nxp.com/t5/i-MX-Processors/Understanding-audio-routing-in-linux-for-wm8985/m-p/741138#M115331 <HTML><HEAD></HEAD><BODY><P>I was able to write the driver. But when i am trying to play the audio it is failing : pcm write I/O Error . How to debug</P></BODY></HTML> Wed, 14 Feb 2018 07:45:54 GMT https://community.nxp.com/t5/i-MX-Processors/Understanding-audio-routing-in-linux-for-wm8985/m-p/741138#M115331 jamalmohiuddin 2018-02-14T07:45:54Z Re: Understanding audio routing in linux for wm8985 https://community.nxp.com/t5/i-MX-Processors/Understanding-audio-routing-in-linux-for-wm8985/m-p/741139#M115332 <HTML><HEAD></HEAD><BODY><P>please use driver sources in Linux Manual and AN4553 Using Open Source</P><P>Debugging Tools for Linux on i.MX Processors<BR /><A class="jive-link-external-small" href="https://community.nxp.com/external-link.jspa?url=https%3A%2F%2Fwww.nxp.com%2Fdocs%2Fen%2Fapplication-note%2FAN4553.pdf" rel="nofollow" target="_blank">https://www.nxp.com/docs/en/application-note/AN4553.pdf</A></P><P>for testing hardware may be useful baremetal sdk:</P><P>Github SDK<BR /><A class="jive-link-external-small" href="https://community.nxp.com/external-link.jspa?url=https%3A%2F%2Fgithub.com%2Fbackenklee%2Fswp-report%2Ftree%2Fmaster%2FiMX6_Platform_SDK" rel="nofollow" target="_blank">https://github.com/backenklee/swp-report/tree/master/iMX6_Platform_SDK</A></P><P></P><P>Best regards<BR />igor</P></BODY></HTML> Wed, 14 Feb 2018 09:35:02 GMT https://community.nxp.com/t5/i-MX-Processors/Understanding-audio-routing-in-linux-for-wm8985/m-p/741139#M115332 igorpadykov 2018-02-14T09:35:02Z