linux-kernel - Re: [PATCH v2 15/20] media: i2c: ov4689: Move pixel array size out of struct ov4689

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Date: Fri, 23 Feb 2024 13:33:00 +0200
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
To: Mikhail Rudenko <mike.rudenko@...il.com>
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
	Sakari Ailus <sakari.ailus@...ux.intel.com>,
	Jacopo Mondi <jacopo@...ndi.org>,
	Tommaso Merciai <tomm.merciai@...il.com>,
	Christophe JAILLET <christophe.jaillet@...adoo.fr>,
	Dave Stevenson <dave.stevenson@...pberrypi.com>,
	Mauro Carvalho Chehab <mchehab@...nel.org>
Subject: Re: [PATCH v2 15/20] media: i2c: ov4689: Move pixel array size out
 of struct ov4689_mode

Hi Mikhail,

Thank you for the patch.

On Mon, Dec 18, 2023 at 08:40:36PM +0300, Mikhail Rudenko wrote:
> Pixel array dimensions and default crop size do not belong to the
> ov4689_mode structure, since they are mode independent. Make them
> defines instead.
> 
> Signed-off-by: Mikhail Rudenko <mike.rudenko@...il.com>
> ---
>  drivers/media/i2c/ov4689.c | 29 +++++++++++++----------------
>  1 file changed, 13 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/media/i2c/ov4689.c b/drivers/media/i2c/ov4689.c
> index b43fb1d7b15f..475508559e3e 100644
> --- a/drivers/media/i2c/ov4689.c
> +++ b/drivers/media/i2c/ov4689.c
> @@ -70,6 +70,11 @@
>  #define OV4689_LANES			4
>  #define OV4689_XVCLK_FREQ		24000000
>  
> +#define OV4689_PIXEL_ARRAY_WIDTH	2720
> +#define OV4689_PIXEL_ARRAY_HEIGHT	1536
> +#define OV4689_DUMMY_ROWS		8
> +#define OV4689_DUMMY_COLUMNS		16

Adding a comment here to indicate that there are dummy columns in each
side would be useful:

#define OV4689_DUMMY_ROWS		8	/* 8 dummy rows on each side */
#define OV4689_DUMMY_COLUMNS		16	/* 16 dummy columns on each side */

Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>

> +
>  static const char *const ov4689_supply_names[] = {
>  	"avdd", /* Analog power */
>  	"dovdd", /* Digital I/O power */
> @@ -90,10 +95,6 @@ struct ov4689_mode {
>  	u32 vts_def;
>  	u32 exp_def;
>  	u32 pixel_rate;
> -	u32 sensor_width;
> -	u32 sensor_height;
> -	u32 crop_top;
> -	u32 crop_left;
>  	const struct cci_reg_sequence *reg_list;
>  	unsigned int num_regs;
>  };
> @@ -254,10 +255,6 @@ static const struct ov4689_mode supported_modes[] = {
>  		.id = OV4689_MODE_2688_1520,
>  		.width = 2688,
>  		.height = 1520,
> -		.sensor_width = 2720,
> -		.sensor_height = 1536,
> -		.crop_top = 8,
> -		.crop_left = 16,
>  		.exp_def = 1536,
>  		.hts_def = 10296,
>  		.hts_min = 3432,
> @@ -385,8 +382,6 @@ static int ov4689_get_selection(struct v4l2_subdev *sd,
>  				struct v4l2_subdev_state *state,
>  				struct v4l2_subdev_selection *sel)
>  {
> -	const struct ov4689_mode *mode = to_ov4689(sd)->cur_mode;
> -
>  	if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
>  		return -EINVAL;
>  
> @@ -394,15 +389,17 @@ static int ov4689_get_selection(struct v4l2_subdev *sd,
>  	case V4L2_SEL_TGT_CROP_BOUNDS:
>  		sel->r.top = 0;
>  		sel->r.left = 0;
> -		sel->r.width = mode->sensor_width;
> -		sel->r.height = mode->sensor_height;
> +		sel->r.width = OV4689_PIXEL_ARRAY_WIDTH;
> +		sel->r.height = OV4689_PIXEL_ARRAY_HEIGHT;
>  		return 0;
>  	case V4L2_SEL_TGT_CROP:
>  	case V4L2_SEL_TGT_CROP_DEFAULT:
> -		sel->r.top = mode->crop_top;
> -		sel->r.left = mode->crop_left;
> -		sel->r.width = mode->width;
> -		sel->r.height = mode->height;
> +		sel->r.top = OV4689_DUMMY_ROWS;
> +		sel->r.left = OV4689_DUMMY_COLUMNS;
> +		sel->r.width =
> +			OV4689_PIXEL_ARRAY_WIDTH - 2 * OV4689_DUMMY_COLUMNS;
> +		sel->r.height =
> +			OV4689_PIXEL_ARRAY_WIDTH - 2 * OV4689_DUMMY_ROWS;
>  		return 0;
>  	}
>  

-- 
Regards,

Laurent Pinchart