linux-kernel - RE: [EXT] Re: [PATCH v2] media: imx-jpeg: Leave a blank space before the configuration data

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Date:   Fri, 27 May 2022 11:33:00 +0000
From:   Ming Qian <ming.qian@....com>
To:     Fabio Estevam <festevam@...il.com>
CC:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        "Mirela Rabulea (OSS)" <mirela.rabulea@....nxp.com>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Sascha Hauer <kernel@...gutronix.de>,
        dl-linux-imx <linux-imx@....com>,
        linux-media <linux-media@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: RE: [EXT] Re: [PATCH v2] media: imx-jpeg: Leave a blank space before
 the configuration data

> From: Fabio Estevam <festevam@...il.com>
> Sent: 2022年5月27日 19:12
> To: Ming Qian <ming.qian@....com>
> Cc: Mauro Carvalho Chehab <mchehab@...nel.org>; Mirela Rabulea (OSS)
> <mirela.rabulea@....nxp.com>; Hans Verkuil <hverkuil-cisco@...all.nl>;
> Shawn Guo <shawnguo@...nel.org>; Sascha Hauer <s.hauer@...gutronix.de>;
> Sascha Hauer <kernel@...gutronix.de>; dl-linux-imx <linux-imx@....com>;
> linux-media <linux-media@...r.kernel.org>; linux-kernel
> <linux-kernel@...r.kernel.org>; open list:OPEN FIRMWARE AND FLATTENED
> DEVICE TREE BINDINGS <devicetree@...r.kernel.org>; moderated
> list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE
> <linux-arm-kernel@...ts.infradead.org>
> Subject: [EXT] Re: [PATCH v2] media: imx-jpeg: Leave a blank space before the
> configuration data
> 
> Caution: EXT Email
> 
> Hi Ming,
> 
> On Fri, May 27, 2022 at 7:25 AM Ming Qian <ming.qian@....com> wrote:
> >
> > There is a hardware bug that it will load the first 128 bytes of
> > configuration data twice, it will led to some configure error.
> > so shift the configuration data 128 bytes, and make the first 128
> > bytes all zero, then hardware will load the 128 zero twice, and ignore
> > them as garbage.
> > then the configuration data can be loaded correctly
> >
> > Signed-off-by: Ming Qian <ming.qian@....com>
> > Reviewed-by: Mirela Rabulea <mirela.rabulea@....com>
> > Reviewed-by: Tommaso Merciai <tommaso.merciai@...rulasolutions.com>
> 
> Fixes tag?

Hi Fabio,
    It's a hardware issue, so I'm not sure is it a driver issue that I fix it.
    Or I just check which patch includes the code I changed, and add the fix tag?

Ming