linux-kernel - Re: [PATCH v2 3/4] media: i2c: alvium: inline set_frame_interval into s_frame

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Message-ID: <ZYK8J9ahkngbI5py@tom-HP-ZBook-Fury-15-G7-Mobile-Workstation>
Date: Wed, 20 Dec 2023 11:04:23 +0100
From: Tommaso Merciai <tomm.merciai@...il.com>
To: Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc: linuxfancy@...glegroups.com, martin.hecht@...et.eu,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/4] media: i2c: alvium: inline set_frame_interval
 into s_frame_interval

Hi Laurent,
Thanks for your review.

On Wed, Dec 20, 2023 at 11:14:13AM +0200, Laurent Pinchart wrote:
> Hi Tommaso,
> 
> Thank you for the patch.
> 
> On Wed, Dec 20, 2023 at 09:56:08AM +0100, Tommaso Merciai wrote:
> > Inline alvium_set_frame_interval() into alvium_s_frame_interval().
> > The alvium_set_frame_interval() is called once only, by
> > alvium_s_frame_interval(). The latter is a thin wrapper around the
> > former. Inline the function in its caller to make the code more
> > readable.
> > 
> > Signed-off-by: Tommaso Merciai <tomm.merciai@...il.com>
> > ---
> > Changes Since v1:
> >  - Now this commit is the 3/4 of the series
> >  - Fixed commit body as suggested by LPinchart
> > 
> >  drivers/media/i2c/alvium-csi2.c | 51 ++++++++++++---------------------
> >  1 file changed, 19 insertions(+), 32 deletions(-)
> > 
> > diff --git a/drivers/media/i2c/alvium-csi2.c b/drivers/media/i2c/alvium-csi2.c
> > index a9ff6cc97cff..b234d74454bf 100644
> > --- a/drivers/media/i2c/alvium-csi2.c
> > +++ b/drivers/media/i2c/alvium-csi2.c
> > @@ -1660,14 +1660,26 @@ static int alvium_g_frame_interval(struct v4l2_subdev *sd,
> >  	return 0;
> >  }
> >  
> > -static int alvium_set_frame_interval(struct alvium_dev *alvium,
> > -				     struct v4l2_subdev_frame_interval *fi,
> > -				     u64 *req_fr)
> > +static int alvium_s_frame_interval(struct v4l2_subdev *sd,
> > +				   struct v4l2_subdev_state *sd_state,
> > +				   struct v4l2_subdev_frame_interval *fi)
> >  {
> > +	struct alvium_dev *alvium = sd_to_alvium(sd);
> >  	struct device *dev = &alvium->i2c_client->dev;
> > +	u64 req_fr = ALVIUM_DEFAULT_FR_HZ;
> 
> No need to initialize the variable. With this fixed,

Perfect, thanks I will drop this in v3.

Regards,
Tommaso

> 
> Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
> 
> >  	u64 dft_fr, min_fr, max_fr;
> >  	int ret;
> >  
> > +	/*
> > +	 * FIXME: Implement support for V4L2_SUBDEV_FORMAT_TRY, using the V4L2
> > +	 * subdev active state API.
> > +	 */
> > +	if (fi->which != V4L2_SUBDEV_FORMAT_ACTIVE)
> > +		return -EINVAL;
> > +
> > +	if (alvium->streaming)
> > +		return -EBUSY;
> > +
> >  	if (fi->interval.denominator == 0)
> >  		return -EINVAL;
> >  
> > @@ -1682,41 +1694,16 @@ static int alvium_set_frame_interval(struct alvium_dev *alvium,
> >  	dev_dbg(dev, "fi->interval.denominator = %d\n",
> >  		fi->interval.denominator);
> >  
> > -	*req_fr = (u64)((fi->interval.denominator * USEC_PER_SEC) /
> > +	req_fr = (u64)((fi->interval.denominator * USEC_PER_SEC) /
> >  		       fi->interval.numerator);
> >  
> > -	if (*req_fr >= max_fr && *req_fr <= min_fr)
> > -		*req_fr = dft_fr;
> > +	if (req_fr >= max_fr && req_fr <= min_fr)
> > +		req_fr = dft_fr;
> >  
> >  	alvium->frame_interval.numerator = fi->interval.numerator;
> >  	alvium->frame_interval.denominator = fi->interval.denominator;
> >  
> > -	return 0;
> > -}
> > -
> > -static int alvium_s_frame_interval(struct v4l2_subdev *sd,
> > -				   struct v4l2_subdev_state *sd_state,
> > -				   struct v4l2_subdev_frame_interval *fi)
> > -{
> > -	struct alvium_dev *alvium = sd_to_alvium(sd);
> > -	u64 req_fr = ALVIUM_DEFAULT_FR_HZ;
> > -	int ret;
> > -
> > -	/*
> > -	 * FIXME: Implement support for V4L2_SUBDEV_FORMAT_TRY, using the V4L2
> > -	 * subdev active state API.
> > -	 */
> > -	if (fi->which != V4L2_SUBDEV_FORMAT_ACTIVE)
> > -		return -EINVAL;
> > -
> > -	if (alvium->streaming)
> > -		return -EBUSY;
> > -
> > -	ret = alvium_set_frame_interval(alvium, fi, &req_fr);
> > -	if (!ret)
> > -		ret = alvium_set_frame_rate(alvium, req_fr);
> > -
> > -	return ret;
> > +	return alvium_set_frame_rate(alvium, req_fr);
> >  }
> >  
> >  static int alvium_enum_mbus_code(struct v4l2_subdev *sd,
> 
> -- 
> Regards,
> 
> Laurent Pinchart