linux-kernel - Re: [PATCH v7 3/3] media: i2c: ov772x: Add test pattern control

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Date:   Fri, 2 Oct 2020 22:32:05 +0100
From:   "Lad, Prabhakar" <prabhakar.csengg@...il.com>
To:     Sakari Ailus <sakari.ailus@...ux.intel.com>
Cc:     Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        Jacopo Mondi <jacopo@...ndi.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media <linux-media@...r.kernel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Biju Das <biju.das.jz@...renesas.com>
Subject: Re: [PATCH v7 3/3] media: i2c: ov772x: Add test pattern control

Hi Sakari,

Thank you for the review.

On Fri, Oct 2, 2020 at 10:13 PM Sakari Ailus
<sakari.ailus@...ux.intel.com> wrote:
>
> On Fri, Oct 02, 2020 at 05:56:56PM +0100, Lad Prabhakar wrote:
> > Add support for test pattern control supported by the sensor.
> >
> > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> > Reviewed-by: Biju Das <biju.das.jz@...renesas.com>
> > Reviewed-by: Jacopo Mondi <jacopo@...ndi.org>
> > ---
> >  drivers/media/i2c/ov772x.c | 17 ++++++++++++++++-
> >  1 file changed, 16 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/media/i2c/ov772x.c b/drivers/media/i2c/ov772x.c
> > index 6b46ad493bf7..b7e10c34ef59 100644
> > --- a/drivers/media/i2c/ov772x.c
> > +++ b/drivers/media/i2c/ov772x.c
> > @@ -227,7 +227,7 @@
> >
> >  /* COM3 */
> >  #define SWAP_MASK       (SWAP_RGB | SWAP_YUV | SWAP_ML)
> > -#define IMG_MASK        (VFLIP_IMG | HFLIP_IMG)
> > +#define IMG_MASK        (VFLIP_IMG | HFLIP_IMG | SCOLOR_TEST)
> >
> >  #define VFLIP_IMG       0x80 /* Vertical flip image ON/OFF selection */
> >  #define HFLIP_IMG       0x40 /* Horizontal mirror image ON/OFF selection */
> > @@ -425,6 +425,7 @@ struct ov772x_priv {
> >       const struct ov772x_win_size     *win;
> >       struct v4l2_ctrl                 *vflip_ctrl;
> >       struct v4l2_ctrl                 *hflip_ctrl;
> > +     unsigned int                      test_pattern;
>
> Alignment.
>
> You can get away with one or possibly two but three is too many in such a
> small number of lines. :-)
>
It's aligned as per structure members (non pointers)

Cheers
Prabhakar

> >       /* band_filter = COM8[5] ? 256 - BDBASE : 0 */
> >       struct v4l2_ctrl                 *band_filter_ctrl;
> >       unsigned int                      fps;
> > @@ -540,6 +541,11 @@ static const struct ov772x_win_size ov772x_win_sizes[] = {
> >       },
> >  };
> >
> > +static const char * const ov772x_test_pattern_menu[] = {
> > +     "Disabled",
> > +     "Vertical Color Bar Type 1",
> > +};
> > +
> >  /*
> >   * frame rate settings lists
> >   */
> > @@ -809,6 +815,9 @@ static int ov772x_s_ctrl(struct v4l2_ctrl *ctrl)
> >               }
> >
> >               return ret;
> > +     case V4L2_CID_TEST_PATTERN:
> > +             priv->test_pattern = ctrl->val;
> > +             return 0;
> >       }
> >
> >       return -EINVAL;
> > @@ -1107,6 +1116,8 @@ static int ov772x_set_params(struct ov772x_priv *priv,
> >               val ^= VFLIP_IMG;
> >       if (priv->hflip_ctrl->val)
> >               val ^= HFLIP_IMG;
> > +     if (priv->test_pattern)
> > +             val |= SCOLOR_TEST;
> >
> >       ret = regmap_update_bits(priv->regmap, COM3, SWAP_MASK | IMG_MASK, val);
> >       if (ret < 0)
> > @@ -1442,6 +1453,10 @@ static int ov772x_probe(struct i2c_client *client)
> >       priv->band_filter_ctrl = v4l2_ctrl_new_std(&priv->hdl, &ov772x_ctrl_ops,
> >                                                  V4L2_CID_BAND_STOP_FILTER,
> >                                                  0, 256, 1, 0);
> > +     v4l2_ctrl_new_std_menu_items(&priv->hdl, &ov772x_ctrl_ops,
> > +                                  V4L2_CID_TEST_PATTERN,
> > +                                  ARRAY_SIZE(ov772x_test_pattern_menu) - 1,
> > +                                  0, 0, ov772x_test_pattern_menu);
> >       priv->subdev.ctrl_handler = &priv->hdl;
> >       if (priv->hdl.error) {
> >               ret = priv->hdl.error;
>
> --
> Sakari Ailus