[Sound-open-firmware] Initial support for i.MX8 platform

[Pierre-Louis Bossart]

On 5/20/19 9:26 AM, Daniel Baluta wrote:
> Hi Liam / Pierre,
> 
> I've sent initial patches for i.MX8 FW [1]. There are still a lot
> of things to be done but I will to solve them step by step.

Thanks, this is great news!

> Appreciate any review and hope to get at least the basic support
> accepted then build on top of that.
> 
> Next steps:
> 
> 1) Add CI support to compile for imx architecture (both FW/Linux)

Maybe a clarification here.

For each PR, we also want to have quick feedback if compilation and 
QEMU-based tests fail, but we can't do hardware-based tests for every PR 
on all platforms.

In addition, for hardware tests, we don't have a centralized CI - 
similar to the majority of the open-source programs. The expectation is 
that every contributor company takes care in depth of their own 
platforms, using GitHub triggers to run the tests as needed. Intel folks 
are not going to run any tests on i.MX hardware nor would we expect 
anyone to run tests for each PR on Intel hardware, though it'd be nice 
to know if the tests fail with the results visible.

So short answer, we can add some compilation checks for i.MX8 on both 
Travis CI and the Intel-hosted one, but don't expect more.

Was this your understanding?

> 2) Send Linux kernel side patches.

For the Linux part, we try to build from a minimal kernel, see the 
kconfig subproject on SOF. If we can have a similar solution for i.MX 
it'd be great. Maintaining entire configs is too complicated, using a 
default + SOF-required additions is a lot simpler.

> 
> Can you guide me on how to deal with 1)?
> 
> thanks,
> Daniel.
> 
> [1] https://github.com/thesofproject/sof/pull/1457
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