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

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Message-ID: <87zfvrcdv4.fsf@gmail.com>
Date: Fri, 23 Feb 2024 19:31:36 +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 13:36 +02, Laurent Pinchart <laurent.pinchart@...asonboard.com> wrote:

> On Fri, Feb 23, 2024 at 01:33:01PM +0200, Laurent Pinchart 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 */
>>
>> 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;
>
> I spoke too fast: this should be OV4689_PIXEL_ARRAY_HEIGHT, not
> OV4689_PIXEL_ARRAY_WIDTH.

Good catch, will fix in v3.

>> >  		return 0;
>> >  	}
>> >


--
Best regards,
Mikhail Rudenko