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[104.188.17.28]) by smtp.gmail.com with ESMTPSA id d72sm732706oob.15.2020.06.22.00.10.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 22 Jun 2020 00:10:13 -0700 (PDT) Date: Mon, 22 Jun 2020 00:07:27 -0700 From: Bjorn Andersson To: Mathieu Poirier Cc: ohad@wizery.com, linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org, loic.pallardy@st.com, arnaud.pouliquen@st.com, s-anna@ti.com Subject: Re: [PATCH v4 3/9] remoteproc: Introducing function rproc_attach() Message-ID: <20200622070727.GD149351@builder.lan> References: <20200601175139.22097-1-mathieu.poirier@linaro.org> <20200601175139.22097-4-mathieu.poirier@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200601175139.22097-4-mathieu.poirier@linaro.org> Sender: linux-remoteproc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org On Mon 01 Jun 10:51 PDT 2020, Mathieu Poirier wrote: > Introducing function rproc_attach() to enact the same actions as > rproc_start(), but without the steps related to the handling of > a firmware image. That way we can properly deal with scenarios > where the remoteproc core needs to attach with a remote processsor > that has been booted by another entity. > > Signed-off-by: Mathieu Poirier > --- > drivers/remoteproc/remoteproc_core.c | 42 ++++++++++++++++++++++++++++ > 1 file changed, 42 insertions(+) > > diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c > index 9f04c30c4aaf..0b323f6b554b 100644 > --- a/drivers/remoteproc/remoteproc_core.c > +++ b/drivers/remoteproc/remoteproc_core.c > @@ -1370,6 +1370,48 @@ static int rproc_start(struct rproc *rproc, const struct firmware *fw) > return ret; > } > > +static int __maybe_unused rproc_attach(struct rproc *rproc) > +{ > + struct device *dev = &rproc->dev; > + int ret; > + For the case where we're going DETACHED -> RUNNING - > OFFLINE we need to consider the pm_runtime (and prepare/unprepare) state of the device as well... Apart from that I think this looks good. Regards, Bjorn > + ret = rproc_prepare_subdevices(rproc); > + if (ret) { > + dev_err(dev, "failed to prepare subdevices for %s: %d\n", > + rproc->name, ret); > + goto out; > + } > + > + /* Attach to the remote processor */ > + ret = rproc_attach_device(rproc); > + if (ret) { > + dev_err(dev, "can't attach to rproc %s: %d\n", > + rproc->name, ret); > + goto unprepare_subdevices; > + } > + > + /* Start any subdevices for the remote processor */ > + ret = rproc_start_subdevices(rproc); > + if (ret) { > + dev_err(dev, "failed to probe subdevices for %s: %d\n", > + rproc->name, ret); > + goto stop_rproc; > + } > + > + rproc->state = RPROC_RUNNING; > + > + dev_info(dev, "remote processor %s is now attached\n", rproc->name); > + > + return 0; > + > +stop_rproc: > + rproc->ops->stop(rproc); > +unprepare_subdevices: > + rproc_unprepare_subdevices(rproc); > +out: > + return ret; > +} > + > /* > * take a firmware and boot a remote processor with it. > */ > -- > 2.20.1 >