linux-kernel - Re: [PATCH 1/2] media: i2c: imx214: Use v4l2_subdev_get

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Date:   Wed, 30 Aug 2023 12:52:21 +0530
From:   Umang Jain <umang.jain@...asonboard.com>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        Michael Riesch <michael.riesch@...fvision.net>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Ricardo Ribalda <ribalda@...nel.org>,
        Kieran Bingham <kieran.bingham@...asonboard.com>
Subject: Re: [PATCH 1/2] media: i2c: imx214: Use v4l2_subdev_get_fmt()

Hi Laurent,

On 8/30/23 12:49 PM, Laurent Pinchart wrote:
> On Wed, Aug 30, 2023 at 10:23:22AM +0530, Umang Jain wrote:
>> The imx214 driver uses the subdev active state, there's no
> Does it ? I don't see a call to v4l2_subdev_init_finalize(), and the
> imx214 struct has fmt and crop fields in which it stores the active
> format.

Yes, It doesn't. Got confused with one of the pad ops (.init_cfg) which 
led me thinking this driver uses active state, whereas I should have 
checked v4l2_subdev_init_finalize()

Apologies for the noise.

This patch should be discarded.
>
>> need to implement the .get_fmt() operation manually. Use the
>> v4l2_subdev_get_fmt() helper instead.
>>
>> Signed-off-by: Umang Jain <umang.jain@...asonboard.com>
>> ---
>>   drivers/media/i2c/imx214.c | 17 +----------------
>>   1 file changed, 1 insertion(+), 16 deletions(-)
>>
>> diff --git a/drivers/media/i2c/imx214.c b/drivers/media/i2c/imx214.c
>> index 2f9c8582f940..d8bdc52f552a 100644
>> --- a/drivers/media/i2c/imx214.c
>> +++ b/drivers/media/i2c/imx214.c
>> @@ -548,21 +548,6 @@ __imx214_get_pad_format(struct imx214 *imx214,
>>   	}
>>   }
>>   
>> -static int imx214_get_format(struct v4l2_subdev *sd,
>> -			     struct v4l2_subdev_state *sd_state,
>> -			     struct v4l2_subdev_format *format)
>> -{
>> -	struct imx214 *imx214 = to_imx214(sd);
>> -
>> -	mutex_lock(&imx214->mutex);
>> -	format->format = *__imx214_get_pad_format(imx214, sd_state,
>> -						  format->pad,
>> -						  format->which);
>> -	mutex_unlock(&imx214->mutex);
>> -
>> -	return 0;
>> -}
>> -
>>   static struct v4l2_rect *
>>   __imx214_get_pad_crop(struct imx214 *imx214,
>>   		      struct v4l2_subdev_state *sd_state,
>> @@ -842,7 +827,7 @@ static const struct v4l2_subdev_pad_ops imx214_subdev_pad_ops = {
>>   	.enum_mbus_code = imx214_enum_mbus_code,
>>   	.enum_frame_size = imx214_enum_frame_size,
>>   	.enum_frame_interval = imx214_enum_frame_interval,
>> -	.get_fmt = imx214_get_format,
>> +	.get_fmt = v4l2_subdev_get_fmt,
>>   	.set_fmt = imx214_set_format,
>>   	.get_selection = imx214_get_selection,
>>   	.init_cfg = imx214_entity_init_cfg,