linux-kernel - Re: [PATCH v7 0/3] remoteproc: imx_rproc: allow attaching to running core kicked by the bootloader

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Message-ID: <CAPDyKFpUF+S8EqVsHct7TFZGupq71Bu7eL3t2Sr=ibhZ518nsQ@mail.gmail.com>
Date: Tue, 15 Jul 2025 13:49:42 +0200
From: Ulf Hansson <ulf.hansson@...aro.org>
To: Mathieu Poirier <mathieu.poirier@...aro.org>
Cc: Hiago De Franco <hiagofranco@...il.com>, linux-pm@...r.kernel.org, 
	linux-remoteproc@...r.kernel.org, Shawn Guo <shawnguo@...nel.org>, 
	Sascha Hauer <s.hauer@...gutronix.de>, Bjorn Andersson <andersson@...nel.org>, 
	Hiago De Franco <hiago.franco@...adex.com>, imx@...ts.linux.dev, 
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
	Peng Fan <peng.fan@....nxp.com>, daniel.baluta@....com, iuliana.prodan@....nxp.com, 
	"Rafael J . Wysocki" <rafael@...nel.org>
Subject: Re: [PATCH v7 0/3] remoteproc: imx_rproc: allow attaching to running
 core kicked by the bootloader

Hi Mathieu,

On Thu, 3 Jul 2025 at 18:45, Mathieu Poirier <mathieu.poirier@...aro.org> wrote:
>
> Hi Hiago,
>
> Many thanks for re-working the changelog and comments in this patchset, things
> are much clearer now.
>
> Thanks,
> Mathieu
>
> On Sun, Jun 29, 2025 at 02:25:09PM -0300, Hiago De Franco wrote:
> > From: Hiago De Franco <hiago.franco@...adex.com>
> >
> > This patch series depends on Ulf's patches that are currently under
> > review, "pmdomain: Add generic ->sync_state() support to genpd" [1].
> > Without them, this series is not going to work.

The series above have been queued for v6.17 in my pmdomain tree.

Do I have your ack to pick $subject series via my pmdomain tree for
v6.17 too or do you think it's better to postpone to v6.18?

Kind regards
Uffe

> >
> > For the i.MX8X and i.MX8 family SoCs, currently when the remotecore is
> > started by the bootloader and the M core and A core are in the same
> > partition, the driver is not capable to detect the remote core and
> > report the correct state of it.
> >
> > This patch series implement a new function, dev_pm_genpd_is_on(), which
> > returns the power status of a given power domain (M core power domains
> > IMX_SC_R_M4_0_PID0 and IMX_SC_R_M4_0_MU_1A in this case). If it is
> > already powered on, the driver will attach to it.
> >
> > Finally, the imx_rproc_clk_enable() function was also changed to make it
> > return before dev_clk_get() is called, as it currently generates an SCU
> > fault reset if the remote core is already running and the kernel tries
> > to enable the clock again. These changes are a follow up from a v1 sent
> > to imx_rproc [2] and from a reported regression [3].
> >
> > [1] https://lore.kernel.org/all/20250523134025.75130-1-ulf.hansson@linaro.org/
> > [2] https://lore.kernel.org/lkml/20250423155131.101473-1-hiagofranco@gmail.com/
> > [3] https://lore.kernel.org/lkml/20250404141713.ac2ntcsjsf7epdfa@hiago-nb/
> >
> > v7:
> > - Added Peng reviewed-by.
> > v6:
> > - https://lore.kernel.org/all/20250626215911.5992-1-hiagofranco@gmail.com/
> > v5:
> > - https://lore.kernel.org/all/20250617193450.183889-1-hiagofranco@gmail.com/
> > v4:
> > - https://lore.kernel.org/lkml/20250602131906.25751-1-hiagofranco@gmail.com/
> > v3:
> > - https://lore.kernel.org/all/20250519171514.61974-1-hiagofranco@gmail.com/
> > v2:
> > - https://lore.kernel.org/lkml/20250507160056.11876-1-hiagofranco@gmail.com/
> > v1:
> > - https://lore.kernel.org/lkml/20250505154849.64889-1-hiagofranco@gmail.com/
> >
> > Hiago De Franco (3):
> >   pmdomain: core: introduce dev_pm_genpd_is_on()
> >   remoteproc: imx_rproc: skip clock enable when M-core is managed by the
> >     SCU
> >   remoteproc: imx_rproc: detect and attach to pre-booted remote cores
> >
> >  drivers/pmdomain/core.c        | 33 +++++++++++++++++++++++++++
> >  drivers/remoteproc/imx_rproc.c | 41 ++++++++++++++++++++++++++++------
> >  include/linux/pm_domain.h      |  6 +++++
> >  3 files changed, 73 insertions(+), 7 deletions(-)
> >
> > --
> > 2.39.5
> >