imx8mq: Android11 load M4 crashed

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imx8mq: Android11 load M4 crashed

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edward_fu
Contributor III

Hi experts,

I am using imx8mq board to develop rpmsg in my project. I am running Android 11.0.0_2.0.0. I flashed the M4 image along with Android images with "uuu_imx_android_flash.sh" script. And in uboot I set bootcmd as below:

  • setenv bootcmd "bootmcu && boota mmc0"

At first, M4 run normally as expected, But after few seconds, M4 program crashed and Android run normally.

What's the problem maybe?

Thanks

Edward

 

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22 Replies

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Qmiller
NXP Employee
NXP Employee

A-core will disable UART2_CLK_ROOT, which is used for M-core debug uart. So M-core will block when running PRINTF().

One can add “ setenv append_bootargs clk_ignore_unused“ in uboot if not paying attention to power consumption

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edward_fu
Contributor III

Thanks,

I have solved the rpmsg problem.

What you said is about solveing M4 crashing when using UART2?  You mean uart2 clock is enabled by A-core not by M-core. I donot agree with you, if as you said, why M4 can run with UART2 printing alone without runging A-core.

 

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