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

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Date:   Sat, 3 Oct 2020 00:13:11 +0300
From:   Sakari Ailus <sakari.ailus@...ux.intel.com>
To:     Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Cc:     Jacopo Mondi <jacopo@...ndi.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Prabhakar <prabhakar.csengg@...il.com>,
        Biju Das <biju.das.jz@...renesas.com>
Subject: Re: [PATCH v7 3/3] media: i2c: ov772x: Add test pattern control

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. :-)

>  	/* 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