Re: [PATCH v1 07/12] media: i2c: imx219: Initialize ycbcr_enc

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Hi Dave,

On Thu, Aug 17, 2023 at 02:59:25PM +0300, Laurent Pinchart wrote:
> Hi Dave,
> 
> (CC'ing Hans Verkuil).
> 
> On Thu, Aug 17, 2023 at 12:00:10PM +0100, Dave Stevenson wrote:
> > On Tue, 15 Aug 2023 at 19:24, Laurent Pinchart wrote:
> > >
> > > While the ycbcr_enc field doesn't apply to raw formats, leaving it
> > > uninitialized makes the driver behave in a less deterministic way. Fix
> > > it by picking the default value for the colorspace.
> > >
> > > Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> > > ---
> > >  drivers/media/i2c/imx219.c | 1 +
> > >  1 file changed, 1 insertion(+)
> > >
> > > diff --git a/drivers/media/i2c/imx219.c b/drivers/media/i2c/imx219.c
> > > index 8c61b748d9a5..976014ed7711 100644
> > > --- a/drivers/media/i2c/imx219.c
> > > +++ b/drivers/media/i2c/imx219.c
> > > @@ -499,6 +499,7 @@ static void imx219_update_pad_format(struct imx219 *imx219,
> > >         fmt->height = mode->height;
> > >         fmt->field = V4L2_FIELD_NONE;
> > >         fmt->colorspace = V4L2_COLORSPACE_RAW;
> > > +       fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(fmt->colorspace);
> > >         fmt->quantization = V4L2_QUANTIZATION_FULL_RANGE;
> > >         fmt->xfer_func = V4L2_XFER_FUNC_NONE;
> > 
> > In [1] for imx290 you requested that I change from using the
> > V4L2_MAP_xxx_DEFAULT macros to hardcode them, and now you're mixing
> > and matching the two in the same driver.
> > Could we have some consistency please? Personally I don't mind which
> > is used, but mixing and matching within a driver feels wrong.
> > (If there is a genuine desire for V4L2_MAP_xxx_DEFAULT or hardcoding
> > in sensor drivers, it'd be nice if it was documented to avoid
> > additional review cycles).
> 
> Absolutely, sorry about this. I'll fix it in v2 and use
> V4L2_MAP_YCBCR_ENC_601.
> 
> Hans, should we add a V4L2_YCBCR_ENC_NONE for non-YUV formats ?
> 
> > Also just noting that you seem not to be using get_maintainers for
> > your patches as I appear not to have been included.
> 
> I'm not sure how that happened, as I use get_maintainer.pl. I probably
> made a mistake somewhere. Sorry about that. I was actually looking
> forward to your review of the series :-)

Actually, you were on CC, so I'm not sure why you haven't received the
series.

> > [1] https://patchwork.linuxtv.org/project/linux-media/patch/20230131192016.3476937-3-dave.stevenson@xxxxxxxxxxxxxxx/#144299
> > 
> > >  }

-- 
Regards,

Laurent Pinchart



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