linux-kernel - Re: [PATCH v11 3/5] media: i2c: imx334: support lower bandwidth mode

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Date:   Fri, 24 Feb 2023 12:51:38 +0200
From:   Sakari Ailus <sakari.ailus@....fi>
To:     Shravan.Chippa@...rochip.com
Cc:     Conor.Dooley@...rochip.com, paul.j.murphy@...el.com,
        daniele.alessandrelli@...el.com, mchehab@...nel.org,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
        festevam@...il.com, linux-imx@....com, linux-media@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        jacopo.mondi@...asonboard.com, Prakash.Battu@...rochip.com
Subject: Re: [PATCH v11 3/5] media: i2c: imx334: support lower bandwidth mode

Hi Shravan,

On Fri, Feb 24, 2023 at 10:02:51AM +0000, Shravan.Chippa@...rochip.com wrote:
> Hi Sakari,
> 
> > -----Original Message-----
> > From: Sakari Ailus <sakari.ailus@....fi>
> > Sent: 22 February 2023 05:03 PM
> > To: shravan Chippa - I35088 <Shravan.Chippa@...rochip.com>
> > Cc: Conor Dooley - M52691 <Conor.Dooley@...rochip.com>;
> > paul.j.murphy@...el.com; daniele.alessandrelli@...el.com;
> > mchehab@...nel.org; robh+dt@...nel.org;
> > krzysztof.kozlowski+dt@...aro.org; shawnguo@...nel.org;
> > s.hauer@...gutronix.de; kernel@...gutronix.de; festevam@...il.com;
> > linux-imx@....com; linux-media@...r.kernel.org; linux-
> > kernel@...r.kernel.org; devicetree@...r.kernel.org; linux-arm-
> > kernel@...ts.infradead.org; jacopo.mondi@...asonboard.com; Battu
> > Prakash Reddy - I30399 <Prakash.Battu@...rochip.com>
> > Subject: Re: [PATCH v11 3/5] media: i2c: imx334: support lower bandwidth
> > mode
> > 
> > EXTERNAL EMAIL: Do not click links or open attachments unless you know the
> > content is safe
> > 
> > On Wed, Feb 22, 2023 at 10:20:56AM +0000, Shravan.Chippa@...rochip.com
> > wrote:
> > > Hi Sakari,
> > >
> > > > -----Original Message-----
> > > > From: Sakari Ailus <sakari.ailus@....fi>
> > > > Sent: 22 February 2023 03:36 PM
> > > > To: Conor Dooley - M52691 <Conor.Dooley@...rochip.com>
> > > > Cc: shravan Chippa - I35088 <Shravan.Chippa@...rochip.com>;
> > > > paul.j.murphy@...el.com; daniele.alessandrelli@...el.com;
> > > > mchehab@...nel.org; robh+dt@...nel.org;
> > > > krzysztof.kozlowski+dt@...aro.org; shawnguo@...nel.org;
> > > > s.hauer@...gutronix.de; kernel@...gutronix.de;
> > festevam@...il.com;
> > > > linux-imx@....com; linux-media@...r.kernel.org; linux-
> > > > kernel@...r.kernel.org; devicetree@...r.kernel.org; linux-arm-
> > > > kernel@...ts.infradead.org; Jacopo Mondi
> > > > <jacopo.mondi@...asonboard.com>; Battu Prakash Reddy - I30399
> > > > <Prakash.Battu@...rochip.com>
> > > > Subject: Re: [PATCH v11 3/5] media: i2c: imx334: support lower
> > > > bandwidth mode
> > > >
> > > > EXTERNAL EMAIL: Do not click links or open attachments unless you
> > > > know the content is safe
> > > >
> > > > On Wed, Feb 22, 2023 at 12:03:10PM +0200, Sakari Ailus wrote:
> > > > > On Wed, Feb 22, 2023 at 09:58:48AM +0000, Conor Dooley wrote:
> > > > > > On Wed, Feb 22, 2023 at 11:14:29AM +0200, Sakari Ailus wrote:
> > > > > > > On Wed, Feb 08, 2023 at 10:39:13AM +0530, shravan kumar wrote:
> > > > > > > > From: Shravan Chippa <shravan.chippa@...rochip.com>
> > > > > >
> > > > > > > > @@ -666,11 +885,26 @@ static int imx334_init_pad_cfg(struct
> > > > v4l2_subdev *sd,
> > > > > > > >         struct v4l2_subdev_format fmt = { 0 };
> > > > > > > >
> > > > > > > >         fmt.which = sd_state ? V4L2_SUBDEV_FORMAT_TRY :
> > > > V4L2_SUBDEV_FORMAT_ACTIVE;
> > > > > > > > -       imx334_fill_pad_format(imx334, &supported_mode, &fmt);
> > > > > > > > +       imx334_fill_pad_format(imx334, &supported_modes[0],
> > > > > > > > + &fmt);
> > > > > > >
> > > > > > > Now that there are multiple modes supported, this would appear
> > > > > > > to get the width, height as well as the other fields (apart
> > > > > > > from mbus
> > > > > > > code) from the first mode.
> > > > > >
> > > > > > Is this statement supposed to be a request to change something,
> > > > > > or just a throwaway comment? It's a little hard for me to
> > > > > > understand your intention here, sorry.
> > > > >
> > > > > Just pointing to what looks like a bug.
> > > >
> > > > Ah, my bad. Please ignore the comment.
> > > >
> > > > This is indeed about init_cfg(), not s_fmt().
> > > >
> > >
> > > I will try to fix init_cfg()
> > 
> > There's no problem with it. Please ignore my original comment on this.
> 
> Just checking, Do I need to do any modifications or the current code is fine?

The init_cfg() implementation is, but please see my other e-mail.

-- 
Regards,

Sakari Ailus