IMX8MQ Default Audio Stream Routing to SGTL500 Lineout for Android 11

topkarag — Wed, 30 Oct 2024 13:07:00 GMT

Platform: IMX8M Custom Board
OS: Android 11
Kernel: 5.10.9-678025-gbccc0b2805b7-dirty
Codec: SGTL5000
Problem: Default Sound Audio Output with Line-Out

My problem is about changing default android stream value to lineout. I have successfully play a .wav file by usind tinyplay command. So the codec is working correctly. But when ı play a example video by using gallery app which is am start -n com.android.gallery3d/.app.MovieActivity -d example.mp4, video opened on my lvds screen but ı did not hear voice from lineout. There is no any sound. As you know, we should hear a voice while we trying change alarm sound or notification sound. But there is no any sound when ı click any sound effect on settings. So, problem is in android os itself.

When ı google about this, ı have seen that there is a conf file which is named audio_policy_configuration.xml, ı have changed defaultOutputDevice as lineout as it shown below.

<modules>
<module name="primary" halVersion="2.0">
<attachedDevices>
<item>Speaker</item>
<item>Built-In Mic</item>
<item>Line-Out</item>
</attachedDevices>
<defaultOutputDevice>Line-Out</defaultOutputDevice> 
So when ı build according to this configuraiton, and write the image into sd card, if ı am using dcss-lvds image(which is not working as lineout), ı do not see line routing by checking it dumpsys audio command. But when ı the same issue by using hdmi image, dumsys audio log comes with line routing as ı need. I have realized that when there is a sound card which is named "imx-audio-hdmi", audio routing will be working correctly. But in dcss-lvds image, even ı have enabled imx-audio-hdmi in .dts file, there is no any sound card which is name "imx-audio-hdmi" and audiorouting is not working. Audio service giving error in logcat also, ı have attached.

Where can it be problem ? Is there any other configuration parameter except audio_policy_configuration.xml ? Why ı must have imx-audio-hdmi in android for doing this routing correctly ?

Attached file zip contents explanations:
audio_policy_configuration.txt: My configuration
dmesg hdmi image .txt: Dmesg log for hdmi image
dumpsys audio_hdmi.txt: Audio service log for hdmi image
dmesg dcss-lvds image.txt : Dmesg for dcss-lvds image. There is no imx-audio-hdmi sound card.
dumpsys audio dcss-lvds.txt: audio service log for dcss lvds image. Check there is no any routing as devices.
logcat grep Audio.txt: Logcat output for audio. There are several messages repeating itself.

Re: IMX8MQ Default Audio Stream Routing to SGTL500 Lineout for Android 11

JorgeCas — Fri, 01 Nov 2024 20:54:51 GMT

Hello,

Our Android documentation in page 42 also mentions that the audio routing is done in audio_policy_configuration.xml as you mention.

Is the issue present if you use another application in audio routing?

Best regards.

Other NXP Products中的主题 IMX8MQ Default Audio Stream Routing to SGTL500 Lineout for Android 11

IMX8MQ Default Audio Stream Routing to SGTL500 Lineout for Android 11

Re: IMX8MQ Default Audio Stream Routing to SGTL500 Lineout for Android 11