linux-kernel - Re: [PATCH] remoteproc: imx_rproc: correct firmware reload

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Message-ID: <YLZZinrEMaYHgsEe@yoga>
Date:   Tue, 1 Jun 2021 11:00:10 -0500
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Mathieu Poirier <mathieu.poirier@...aro.org>
Cc:     "Peng Fan (OSS)" <peng.fan@....nxp.com>, ohad@...ery.com,
        o.rempel@...gutronix.de, shawnguo@...nel.org,
        s.hauer@...gutronix.de, kernel@...gutronix.de, festevam@...il.com,
        linux-imx@....com, linux-remoteproc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Peng Fan <peng.fan@....com>
Subject: Re: [PATCH] remoteproc: imx_rproc: correct firmware reload

On Tue 01 Jun 10:31 CDT 2021, Mathieu Poirier wrote:

> On Tue, Jun 01, 2021 at 06:29:39PM +0800, Peng Fan (OSS) wrote:
> > From: Peng Fan <peng.fan@....com>
> > 
> > ENABLE_M4 should be set to 1 when loading code to TCM, otherwise
> > you will not able to replace the firmware after you stop m4.
> > 
> > Besides ENABLE_M4, we still need set SW_M4C_RST, because this bit
> > will be automatically set with SW_M4C_NON_SCLR_RST set.
> > 
> > Signed-off-by: Peng Fan <peng.fan@....com>
> > ---
> > 
> > V1:
> >  Although this is an fix, but it is not critical, patch is based on
> >  https://patchwork.kernel.org/project/linux-remoteproc/cover/1620274123-1461-1-git-send-email-peng.fan@oss.nxp.com/
> > 
> >  drivers/remoteproc/imx_rproc.c | 8 +++++---
> >  1 file changed, 5 insertions(+), 3 deletions(-)
> > 
> > diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
> > index cd2ca96a30e5..ce2ce42bee91 100644
> > --- a/drivers/remoteproc/imx_rproc.c
> > +++ b/drivers/remoteproc/imx_rproc.c
> > @@ -33,7 +33,8 @@
> >  
> >  #define IMX7D_M4_START			(IMX7D_ENABLE_M4 | IMX7D_SW_M4P_RST \
> >  					 | IMX7D_SW_M4C_RST)
> > -#define IMX7D_M4_STOP			(IMX7D_ENABLE_M4 | IMX7D_SW_M4C_NON_SCLR_RST)
> > +#define IMX7D_M4_STOP			(IMX7D_ENABLE_M4 | IMX7D_SW_M4C_RST | \
> > +					 IMX7D_SW_M4C_NON_SCLR_RST)
> >  
> >  /* Address: 0x020D8000 */
> >  #define IMX6SX_SRC_SCR			0x00
> > @@ -44,7 +45,8 @@
> >  
> >  #define IMX6SX_M4_START			(IMX6SX_ENABLE_M4 | IMX6SX_SW_M4P_RST \
> >  					 | IMX6SX_SW_M4C_RST)
> > -#define IMX6SX_M4_STOP			(IMX6SX_ENABLE_M4 | IMX6SX_SW_M4C_NON_SCLR_RST)
> > +#define IMX6SX_M4_STOP			(IMX6SX_ENABLE_M4 | IMX6SX_SW_M4C_RST | \
> > +					 IMX6SX_SW_M4C_NON_SCLR_RST)
> >  #define IMX6SX_M4_RST_MASK		(IMX6SX_ENABLE_M4 | IMX6SX_SW_M4P_RST \
> >  					 | IMX6SX_SW_M4C_NON_SCLR_RST \
> >  					 | IMX6SX_SW_M4C_RST)
> > @@ -691,7 +693,7 @@ static int imx_rproc_detect_mode(struct imx_rproc *priv)
> >  		return ret;
> >  	}
> >  
> > -	if (!(val & dcfg->src_stop))
> > +	if ((val & dcfg->src_mask) != dcfg->src_stop)
> >  		priv->rproc->state = RPROC_DETACHED;
> 
> Reviewed-by: Mathieu Poirier <mathieu.poirier@...aro.org>
> 
> Bjorn hasn't picked up this set yet so it is best to send a v7 of [1] with this
> change merged in it.
> 

Sorry I had missed that [1] was fully reviewed, so I figured I'll just
apply the series and squash this in. But afaict this patch isn't a fix
to any of the patches in [1].

More so, this patch doesn't apply on top of either v5.13-rc1, linux-next
or [1] - because neither IMX7D_M4_STOP nor IMX6SX_M4_STOP has
IMX6SX_ENABLE_M4 included.


Peng, I've applied [1] now, please let me know what to do about this
patch.

Regards,
Bjorn

> Thanks,
> Mathieu 
> 
> [1]. https://patchwork.kernel.org/project/linux-remoteproc/cover/1620274123-1461-1-git-send-email-peng.fan@oss.nxp.com/
> 
> >  
> >  	return 0;
> > -- 
> > 2.30.0
> >