Yocto Image for H3ULCB+Kingfisher M04
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Sorry, I have never used android on H3ULCB + KF.
But, I tested Yocto v3.21.0 on H3ULCB(ES2.0 4GB) + KF(M04) again.
And I confirmed that it works.
How about using yocto bootloader ?
if yocto can be booted, android bootloder may not be good for yocto...
Thanks for your help Y.H. With the Yocto-Firmware it boots as expected.
How I need to get the Android part working again, but boota is not supported in the Yocto's u-boot. But that's a different story now.
I prepared android 9 for H3ULCB(ES2.0 4GB) + KF(M4), and tested for booting yocto.
In my environment, yocto was booted with android's IPL and U-boot.
If you use old version of android, how about updating it ?
Thank you, this is very valuable feedback! I also used Android 9 with the same hardware as you have but for me it didn't work.
Would you mind posting the output of the full boot process including the u-boot environment varibles?
Here is my bootlog:
IPL is Rev.2.0.4 in my environment, but Rev.2.0.3 is used in your environment.
So, please update Android and IPL, then try to boot yocto v3.21.0 again.
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Sorry, I noticed that I had used upstream dtb instead of KF BSP's one...
Thus, I confirmed again whether yocto can be booted or not.
As the result, I got kernel panic as same as you did.
I investigated the log, and noticed kernel is stopped at around rpc.
Below is a part of your log.
[ 1.574607] renesas-rpc ee200000.rpc0: using DMA read (dma0chan0)
[ 1.581125] Bad mode in Error handler detected on CPU1, code 0xbf000000 -- SError
I think it may be caused by a mismatch configuration for rpc between Android IPL and kernel .
Finally, I confirmed to boot yocto after I disabled rpc driver in kernel.
Here is patch of modification.
I hope that you can boot yocto as same as I do.
note) If you are not going to use rpc, please ignore after this.
I found patch about RPC for IPL:
If this patch is applied to Android IPL, Yocto may be booted without any modification.
However, I don't have build environment for android so that I cannot confirmed it.