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 13:36:37 +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

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.

> >  		return 0;
> >  	}
> >  

-- 
Regards,

Laurent Pinchart