Linux/OMAP4430: Audio driver state machine

Seetharam Nayak

Part Number: OMAP4430

Tool/software: Linux

Hello All,

I am working on OMA4430 Linux. In my device when text to speech application is used, after some time audio stops. No more device audio on headset/speaker.

I want to understand the Audio state machine clearly. Please share any document or any information that is useful.Or please share Linux driver so that I can compare this with mine.

Thank you.

over 9 years ago

0 Yordan Kovachev over 9 years ago

TI__Guru**** 161600 points

Hi,

Please share any document or any information that is useful.

Have a look at this wiki:
omappedia.org/.../Audio_Drive_Arch

Or please share Linux driver so that I can compare this with mine.

You could use the Android kernel sources for reference:
omappedia.org/.../4AJ.2.5P2_OMAP4_Jelly_Bean_Release_Notes

Use
git clone git://git.omapzoom.org/kernel/omap.git kernel/android-3.4
cd kernel/android-3.4
git checkout 7a3725d9ffcf450b12c89e139735284eb3c19e34
to obtain kernel sources.

Best Regards,
Yordan

0 Seetharam Nayak over 9 years ago in reply to Yordan Kovachev

Intellectual 480 points

Hi Yordan,

Thank you very much for your response.

Could you please share the document with explanation of OMAP4430 Audio state machine transitions. I need to understand this to solve an issue here. I want to know the driver implemented by TI on WEC7 for which this knowledge is important. Please help.

Regards,
Seetharam

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Linux/OMAP4430: Audio driver state machine