linux-kernel - Re: [PATCH v2 00/12] remoteproc: stm32: Add support for synchronising with M4

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Message-ID: <219771d3-b0a5-0ec7-7f20-d2055bcb0217@st.com>
Date:   Wed, 29 Apr 2020 17:08:32 +0200
From:   Arnaud POULIQUEN <arnaud.pouliquen@...com>
To:     Mathieu Poirier <mathieu.poirier@...aro.org>,
        <bjorn.andersson@...aro.org>, <ohad@...ery.com>,
        <mcoquelin.stm32@...il.com>, <alexandre.torgue@...com>
CC:     <loic.pallardy@...com>, <linux-remoteproc@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 00/12] remoteproc: stm32: Add support for synchronising
 with M4

Hi Mathieu,

On 4/24/20 10:24 PM, Mathieu Poirier wrote:
> This patchset needs to be applied on top of this one [1].
> 
> It refactors the STM32 platform code in order to introduce support for
> synchronising with the M4 remote processor that would have been started by
> the boot loader or another entity.
> 
> It carries the same functionatlity as the previeous revision but account
> for changes in the remoteproc core to support synchronisation scenarios.
> Some RB tags have been removed when the content of the patch has strayed 
> too far from the original version. See patch 3, 8, 9 and 12 for more
> details.

I reviewed the series, and made some tests on my side.
FYI, I do not answer to patches when tagged "Reviewed-by: Loic Pallardy" 
and with no extra remark. So consider them as Reviewed-by me but not
necessary to add the tag in commit, Reviewed-by: loic in commit is sufficient. 

Concerning tests, it works find except the crash recovery from a sync start.
But i suppose that you know the limitation, waiting Loic patches[1] update :)

[1]: https://lkml.org/lkml/2020/3/11/403

Thanks a lot for your work!
Arnaud
 

> 
> Tested on ST's mp157c board.
> 
> Thanks,
> Mathieu
> 
> [1]. https://patchwork.kernel.org/project/linux-remoteproc/list/?series=277049
> [2]. https://patchwork.kernel.org/project/linux-remoteproc/list/?series=239877
> 
> Mathieu Poirier (12):
>   remoteproc: stm32: Decouple rproc from memory translation
>   remoteproc: stm32: Request IRQ with platform device
>   remoteproc: stm32: Decouple rproc from DT parsing
>   remoteproc: stm32: Remove memory translation from DT parsing
>   remoteproc: stm32: Parse syscon that will manage M4 synchronisation
>   remoteproc: stm32: Get coprocessor state
>   remoteproc: stm32: Get loaded resource table for synchronisation
>   remoteproc: stm32: Introduce new start ops for synchronisation
>   remoteproc: stm32: Update M4 state in stm32_rproc_stop()
>   remoteproc: stm32: Introduce new parse fw ops for synchronisation
>   remoteproc: stm32: Introduce new loaded rsc ops for synchronisation
>   remoteproc: stm32: Set synchronisation state machine if needed
> 
>  drivers/remoteproc/stm32_rproc.c | 262 ++++++++++++++++++++++++++++---
>  1 file changed, 244 insertions(+), 18 deletions(-)
>