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 19:29:06 +0300
From: Mikhail Rudenko <mike.rudenko@...il.com>
To: Laurent Pinchart <laurent.pinchart@...asonboard.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 Laurent,

and thanks for the review!

On 2024-02-23 at 13:33 +02, Laurent Pinchart <laurent.pinchart@...asonboard.com> wrote:

> 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 */

Will add the comments in v3.

>
> 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;
>>  	}
>>


--
Best regards,
Mikhail Rudenko