On Thu, May 6, 2021 at 3:28 PM Peter Bergin <peter@berginkonsult.se> wrote:

> Hi Brian,
> On 2021-05-06 14:41, Brian Hutchinson wrote:
>
> Hi,
>
> Yesterday I checked out Hardknott (creating layers manually due to repo
> sync issues) and tried to build core-image-base for my imx8mm-evk.
>
> First I noticed that there wasn't a machine config for imx8mmevk (as there
> was for Dunfell, Gatesgarth etc.), but there was a config for
> imx8mm-ddr4-evk so I used that in my setup:
>
> There are two configs for imx8mm EVKs, one for ddr4 and one for lpddr4.
> Check your board so you get the correct one. 8MMINILPD4 = lpddr4 and
> 8MMINID4 = ddr4. I have a imx8mm_lpddr4_evk in my project ad have been able
> to build hardknott without issues.
>
Yes, the LPDDR4 version has a NAND flash if memory serves me right.  Mine
is the older version (Rev B) DDR4 version with eMMC and NOR flash.

> EULA=1 DISTRO=poky MACHINE=imx8mm-ddr4-evk source setup-environment build
>
> I need the 5.10 kernel, but did not see the trick Andrey showed me to
> change:
> #IMX_DEFAULT_BSP = "nxp"
> IMX_DEFAULT_BSP = "mainline"
>
> ... in machine .conf to switch to linux-fslc, so I just put this in my
> local.conf:
>
> PREFERRED_PROVIDER_virtual/kernel = "linux-fslc"
> PREFERRED_VERSION_linux-fslc = "5.10%"
>
> This is not needed in hardknott as imx8mm-*-evk machines are using
> mainline and linux-fslc by default.
>
> Any advice on what to do or try next is greatly appreciated.
>
> The error you see below is because the u-boot configuration
> imx8mm_ddr4_evk is not present in u-boot-fslc. There is only imx8mm_evk
> config that is intended for lpddr4 variant. This is an error in the
> configuration in Yocto but I'm a bit unsure the way forward.
>
> One thing you can try is to use u-boot-imx instead by adding:
>
>     PREFERRED_PROVIDER_virtual/bootloader = "u-boot-imx"
>
I'll try that and see what happens!

Thanks!