Re: How to get firmware-imx for imx8mm evk into sdcard image? I'm getting firmware loading errors for sdma-imx7d.bin etc.

Andrey Zhizhikin

Hello Brian,

On Tue, Oct 6, 2020 at 10:44 PM Brian Hutchinson <b.hutchman@...> wrote:

On Tue, Oct 6, 2020 at 01:22 PM, Andrey Zhizhikin wrote:

Hello Brian,

On Tue, Oct 6, 2020 at 9:51 PM Brian Hutchinson <b.hutchman@...> wrote:

... what "distro" 'should' I be using since I have a custom board that's based on imx8mm evk but I don't necessarily want/need wifi, bluetooth, video, touchscreen etc.???

I suggest you go with your own distro then, as you can leverage the
DISTRO_FEATURES in it yourself. You can either take any of 'fsl-'
prefixed distros over 'poky' if you need some NXP proprietary
components (e.g. VPU, GPU, etc), or take any of 'fslc-' prefixed ones
if you want to stay with mainline. Please note - I do not say that
'poky' would not work here! :) It is just a reference distro from
Yocto Project, which targets qemu on the first place, but also works
well for real HW.

This is the way we build our distro (derived from 'fsl-wayland'), and
so far it has proven to be working quite well. I also do sanity build
and run the 'fsl-wayland' off the master on imx8mmevk to make sure
there are no regressions.

When I did NXP released builds I would use fsl-wayland distro but if memory serves me right a core-image-minimal would not boot. Only core-image-base images did and they were quite large.
I just did a following build:
$ MACHINE=imx8mmevk DISTRO=fsl-wayland bitbake core-image-minimal

Image produced boots fine on i.MX8M Mini EVK.

Runtime device info:
# cat /etc/os-release
NAME="FSL Wayland"
VERSION="3.2-snapshot-20201008 (master)"
PRETTY_NAME="FSL Wayland 3.2-snapshot-20201008 (master)"

# uname -a
Linux imx8mmevk 5.4.24+gbabac008e5cf #1 SMP PREEMPT Sat May 30
07:25:46 UTC 2020 aarch64 GNU/Linux

Please note: with this configuration you would get a kernel from NXP
(versioned 5.4.24). If you would like to utilize the NXP kernel with
latest stable patch level, you should switch
PREFERRED_PROVIDER_virtual/kernel_mx8mm = "linux-imx" to
PREFERRED_PROVIDER_virtual/kernel_mx8mm = "linux-imx-fslc"

I do need to create my own distro but kind of would like to start from core-image-minimal and build up rather than take something like fsl-wayland and try to figure out what I don't need. Being new to NXP family this approach "feels" more logical.

Is poky what's causing my pain?

You can see what distro features you have included when you do
'bitbake -e' and search for DISTRO_FEATURES. If you have (and
according to what you say - you do :) ) some pieces you do not need -
you can always either not include them in your custom distro, or use
DISTRO_FEATURES_remove = "<unneeded list>".

I've been doing TI based builds forever and recently switched over to NXP based products so still learning the lay of the land. I finally discovered I don't think I want to be building based off NXP releases from codeaurora and that Freescale is the better base for our products but not 100% clear what distro's are available and which ones I should focus on.

Those distros are located in a meta-freescale-distro layer, you can
peek there to see what's available.

I'll look. Thanks




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