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From: Peng Fan <peng.fan@nxp.com>
To: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: "bjorn.andersson@linaro.org" <bjorn.andersson@linaro.org>,
	"o.rempel@pengutronix.de" <o.rempel@pengutronix.de>,
	"robh+dt@kernel.org" <robh+dt@kernel.org>,
	"linux-remoteproc@vger.kernel.org"
	<linux-remoteproc@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"shawnguo@kernel.org" <shawnguo@kernel.org>,
	"s.hauer@pengutronix.de" <s.hauer@pengutronix.de>,
	"kernel@pengutronix.de" <kernel@pengutronix.de>,
	"festevam@gmail.com" <festevam@gmail.com>,
	dl-linux-imx <linux-imx@nxp.com>,
	"linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
	"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>
Subject: RE: [PATCH 04/10] remoteproc: imx_rproc: make syscon optional
Date: Wed, 19 Aug 2020 00:51:27 +0000
Message-ID: <DB6PR0402MB276017AA0C124172D9BC3483885D0@DB6PR0402MB2760.eurprd04.prod.outlook.com> (raw)
In-Reply-To: <20200818214350.GA3822080@xps15>

> Subject: Re: [PATCH 04/10] remoteproc: imx_rproc: make syscon optional
> 
> Hi Peng,
> 
> On Fri, Jul 24, 2020 at 04:08:07PM +0800, Peng Fan wrote:
> > Make syscon optional, since i.MX8QM/QXP/7ULP not have SRC to control
> M4.
> > But currently i.MX8QM/QXP/7ULP not added, so still check regmap when
> > start/stop to avoid unhappy things.
> 
> On the i.MX8QM/QXP/7ULP processors, the remote processors are not
> handled by the remoteproc cores, as implemented in this patch.  In such a
> scenario how does the remoteproc core know the remote processor has
> crashed and how does it recover from such a condition?

For 7ULP dual boot case, A7 is under control of M4, so if m4 crash, I suppose
A7 would not work properly.

For 8QM/QXP partition case, M4 is in a standalone partition, if M4 crash or
reboot, the system controller unit will restart M4 and notify Acore that M4
restart.

Thanks,
Peng.

> 
> Thanks,
> Mathieu
> 
> >
> > Reviewed-by: Richard Zhu <hongxing.zhu@nxp.com>
> > Signed-off-by: Peng Fan <peng.fan@nxp.com>
> > ---
> >  drivers/remoteproc/imx_rproc.c | 11 +++++++++--
> >  1 file changed, 9 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/remoteproc/imx_rproc.c
> > b/drivers/remoteproc/imx_rproc.c index 82594a800a1b..4fad5c0b1c05
> > 100644
> > --- a/drivers/remoteproc/imx_rproc.c
> > +++ b/drivers/remoteproc/imx_rproc.c
> > @@ -162,6 +162,9 @@ static int imx_rproc_start(struct rproc *rproc)
> >  	struct device *dev = priv->dev;
> >  	int ret;
> >
> > +	if (!priv->regmap)
> > +		return -EOPNOTSUPP;
> > +
> >  	ret = regmap_update_bits(priv->regmap, dcfg->src_reg,
> >  				 dcfg->src_mask, dcfg->src_start);
> >  	if (ret)
> > @@ -177,6 +180,9 @@ static int imx_rproc_stop(struct rproc *rproc)
> >  	struct device *dev = priv->dev;
> >  	int ret;
> >
> > +	if (!priv->regmap)
> > +		return -EOPNOTSUPP;
> > +
> >  	ret = regmap_update_bits(priv->regmap, dcfg->src_reg,
> >  				 dcfg->src_mask, dcfg->src_stop);
> >  	if (ret)
> > @@ -325,9 +331,10 @@ static int imx_rproc_probe(struct platform_device
> *pdev)
> >  	regmap = syscon_regmap_lookup_by_phandle(np, "syscon");
> >  	if (IS_ERR(regmap)) {
> >  		dev_err(dev, "failed to find syscon\n");
> > -		return PTR_ERR(regmap);
> > +		regmap = NULL;
> > +	} else {
> > +		regmap_attach_dev(dev, regmap, &config);
> >  	}
> > -	regmap_attach_dev(dev, regmap, &config);
> >
> >  	/* set some other name then imx */
> >  	rproc = rproc_alloc(dev, "imx-rproc", &imx_rproc_ops,
> > --
> > 2.16.4
> >

  reply index

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-24  8:08 [PATCH 00/10] remoteproc: imx_rproc: support iMX8M and early boot Peng Fan
2020-07-24  8:08 ` [PATCH 01/10] dt-bindings: remoteproc: imx_rproc: add i.MX8MQ/M Peng Fan
2020-07-31 20:14   ` Rob Herring
2020-07-24  8:08 ` [PATCH 02/10] remoteproc: imx_rproc: correct err message Peng Fan
2020-08-11 19:56   ` Mathieu Poirier
2020-07-24  8:08 ` [PATCH 03/10] remoteproc: imx: use devm_ioremap Peng Fan
2020-07-27  6:23   ` Oleksij Rempel
2020-07-27  6:28     ` Peng Fan
2020-07-27  6:41       ` Oleksij Rempel
2020-07-27  6:51         ` Peng Fan
2020-07-27  7:37           ` Oleksij Rempel
2020-07-27  8:11             ` Peng Fan
2020-07-28  7:20               ` Oleksij Rempel
2020-07-24  8:08 ` [PATCH 04/10] remoteproc: imx_rproc: make syscon optional Peng Fan
2020-08-11 22:40   ` Mathieu Poirier
2020-08-18 21:43   ` Mathieu Poirier
2020-08-19  0:51     ` Peng Fan [this message]
2020-08-19 19:45       ` Mathieu Poirier
2020-08-20  2:04         ` Peng Fan
2020-08-20 19:27           ` Mathieu Poirier
2020-07-24  8:08 ` [PATCH 05/10] remoteproc: imx_rproc: make clk optional Peng Fan
2020-07-24  8:08 ` [PATCH 06/10] remoteproc: imx_rproc: add load hook Peng Fan
2020-07-27  5:20   ` Oleksij Rempel
2020-08-11 21:40   ` Mathieu Poirier
2020-07-24  8:08 ` [PATCH 07/10] remoteproc: imx_rproc: add i.MX specific parse fw hook Peng Fan
2020-08-11 21:56   ` Mathieu Poirier
2020-07-24  8:08 ` [PATCH 08/10] remoteproc: imx_rproc: support i.MX8MQ/M Peng Fan
2020-07-24  8:08 ` [PATCH 09/10] remoteproc: imx_proc: enable virtio/mailbox Peng Fan
2020-07-24  8:08 ` [PATCH 10/10] remoteproc: imx_rproc: support coproc booting before Linux Peng Fan
2020-08-11 22:36   ` Mathieu Poirier
2020-07-27  6:38 ` [PATCH 00/10] remoteproc: imx_rproc: support iMX8M and early boot Oleksij Rempel
2020-07-27  6:44   ` Peng Fan
2020-07-27  7:54     ` Oleksij Rempel
2020-07-27  9:18       ` Peng Fan
2020-07-28  7:26         ` Oleksij Rempel
2020-07-28  7:50           ` Peng Fan
2020-07-28  7:55             ` Oleksij Rempel
2020-07-28  9:36               ` Peng Fan

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