linux-kernel - Re: [PATCH 5/5] media: i2c: alvium: Move V4L2_CID_GAIN to V4L2_CID_ANALOG

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Date: Fri, 26 Apr 2024 09:09:35 +0200
From: Tommaso Merciai <tomm.merciai@...il.com>
To: Sakari Ailus <sakari.ailus@....fi>
Cc: martin.hecht@...et.eu, michael.roeder@...et.eu,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/5] media: i2c: alvium: Move V4L2_CID_GAIN to
 V4L2_CID_ANALOG_GAIN

Hi Sakari,
Thanks for your review.

On Wed, Apr 24, 2024 at 06:11:26PM +0000, Sakari Ailus wrote:
> Hi Tommaso,
> 
> On Tue, Apr 16, 2024 at 04:19:05PM +0200, Tommaso Merciai wrote:
> > Into alvium cameras REG_BCRM_GAIN_RW control the analog gain.
> > Let's use the right V4L2_CID_ANALOGUE_GAIN ctrl.
> > 
> > Signed-off-by: Tommaso Merciai <tomm.merciai@...il.com>
> > ---
> >  drivers/media/i2c/alvium-csi2.c | 6 +++---
> >  1 file changed, 3 insertions(+), 3 deletions(-)
> > 
> > diff --git a/drivers/media/i2c/alvium-csi2.c b/drivers/media/i2c/alvium-csi2.c
> > index 30ef9b905211..56d64f27df72 100644
> > --- a/drivers/media/i2c/alvium-csi2.c
> > +++ b/drivers/media/i2c/alvium-csi2.c
> > @@ -1993,7 +1993,7 @@ static int alvium_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
> >  	int val;
> >  
> >  	switch (ctrl->id) {
> > -	case V4L2_CID_GAIN:
> > +	case V4L2_CID_ANALOGUE_GAIN:
> >  		val = alvium_get_gain(alvium);
> >  		if (val < 0)
> >  			return val;
> > @@ -2025,7 +2025,7 @@ static int alvium_s_ctrl(struct v4l2_ctrl *ctrl)
> >  		return 0;
> >  
> >  	switch (ctrl->id) {
> > -	case V4L2_CID_GAIN:
> > +	case V4L2_CID_ANALOGUE_GAIN:
> >  		ret = alvium_set_ctrl_gain(alvium, ctrl->val);
> >  		break;
> >  	case V4L2_CID_AUTOGAIN:
> > @@ -2154,7 +2154,7 @@ static int alvium_ctrl_init(struct alvium_dev *alvium)
> >  
> >  	if (alvium->avail_ft.gain) {
> >  		ctrls->gain = v4l2_ctrl_new_std(hdl, ops,
> > -						V4L2_CID_GAIN,
> > +						V4L2_CID_ANALOGUE_GAIN,
> >  						alvium->min_gain,
> >  						alvium->max_gain,
> >  						alvium->inc_gain,
> 
> This looks like a bugfix. Shouldn't it be cc'd to stable as well? A Fixes:
> tag would be nice, too.

Fully agree.
Plan is to add in v2 Fixes: 0a7af872915e ("media: i2c: Add support for alvium camera")
like you suggest and stable@...r.kernel.org in CC.

Thanks & Regards,
Tommaso

> 
> -- 
> Regards,
> 
> Sakari Ailus