AM5728: DSP shutdown from Linux

Edmund Carvalho

Part Number: AM5728

I have an application which sends messages between ARM-DSP using IPC messageQ,
When the ARM application crashes the DSP side is still running and keeps posting messages to the messageQ.

I am looking for a way to shutdown the DSP from an ARM application or a command line interface.

Also is there a way to reset the DSP from ARM ?

over 5 years ago

0 Pavel Botev over 5 years ago

TI__Guru**** 170625 points

Hi Edmund,

You can poweroff DSP from userspace with devmem2 or omapconf, through writing into the PRCM DSP registers:

PM_DSP1_PWRSTCTRL, PM_DSP1_PWRSTST, etc

Please refer to below e2e thread for details:

Regards,
Pavel

0 Nick Saulnier over 5 years ago in reply to Pavel Botev

TI__Guru** 102120 points

Hello Edmund,

What version of Linux are you using? How are you loading the DSP to begin with?

You should be able to use RemoteProc to bring the DSP / IPU cores up and down with bind/unbind or sysfs commands start / stop. We can provide more information on that.

Regards,

Nick

0 Nick Saulnier over 5 years ago in reply to Nick Saulnier

TI__Guru** 102120 points

Hello Edmund,

I am going to mark this thread resolved for now. Feel free to reply if you have follow-up questions. For an example of binding / unbinding the cores, please go to our IPC documentation and search for "bind".

Regards,

Nick

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AM5728: DSP shutdown from Linux