linux-kernel - Re: [PATCH 00/10] remoteproc: imx_rproc: support iMX8M and early boot

Open Source and information security mailing list archives

Date:   Mon, 27 Jul 2020 08:38:39 +0200
From:   Oleksij Rempel <o.rempel@...gutronix.de>
To:     Peng Fan <peng.fan@....com>
Cc:     bjorn.andersson@...aro.org, mathieu.poirier@...aro.org,
        robh+dt@...nel.org, devicetree@...r.kernel.org, festevam@...il.com,
        s.hauer@...gutronix.de, linux-remoteproc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-imx@....com,
        kernel@...gutronix.de, shawnguo@...nel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 00/10] remoteproc: imx_rproc: support iMX8M and early boot

Hi,

On Fri, Jul 24, 2020 at 04:08:03PM +0800, Peng Fan wrote:
> This patchset is to support i.MX8MQ/M coproc booted before linux.
> Since i.MX8MQ/M was not supported, several patches are needed
> to first support the platform, then support early boot case.
> 
> I intended to included i.MX8QM/QXP, but that would introduce a large
> patchset, so not included. But the clk/syscon optional patch for
> i.MX8QM/QXP was still kept here to avoid rebase error.

Thank you for your work.

Can you please provide more information about big picture of this work.

If I see it correctly, we have here support for i.MX8MM, which seems to
be able to fully control Cortex M4 (enable CPU core, etc...).

And other case, where remoteproc is running on application processor and
can't or should not touch M4 (i.MX7ULP, i.MX8QM/QXP..). Since M4
provides some functionality, you are trying to reuse remoteproc
framework to get resource table present in ELF header and to dynamically
load things. For some reasons this header provides more information then
needed, so you are changing the ELF parser in the kernel to workaround
it.

Correct?

> Peng Fan (10):
>   dt-bindings: remoteproc: imx_rproc: add i.MX8MQ/M
>   remoteproc: imx_rproc: correct err message
>   remoteproc: imx: use devm_ioremap
>   remoteproc: imx_rproc: make syscon optional
>   remoteproc: imx_rproc: make clk optional
>   remoteproc: imx_rproc: add load hook
>   remoteproc: imx_rproc: add i.MX specific parse fw hook
>   remoteproc: imx_rproc: support i.MX8MQ/M
>   remoteproc: imx_proc: enable virtio/mailbox
>   remoteproc: imx_rproc: support coproc booting before Linux
> 
>  .../devicetree/bindings/remoteproc/imx-rproc.txt   |   3 +
>  drivers/remoteproc/imx_rproc.c                     | 409 ++++++++++++++++++++-
>  2 files changed, 401 insertions(+), 11 deletions(-)
> 
> -- 
> 2.16.4
> 
> 
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
> 

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