linux-kernel - Re: [PATCH 1/6] media: v4l2-subdev: stub v4l2_subdev_get_try

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Message-ID: <20181203134800.GA2901@w540>
Date:   Mon, 3 Dec 2018 14:48:00 +0100
From:   jacopo mondi <jacopo@...ndi.org>
To:     Lubomir Rintel <lkundrak@...sk>
Cc:     "Lad, Prabhakar" <prabhakar.csengg@...il.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rui Miguel Silva <rmfrfs@...il.com>,
        Shunqian Zheng <zhengsq@...k-chips.com>,
        Jonathan Corbet <corbet@....net>,
        Wenyou Yang <wenyou.yang@...rochip.com>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/6] media: v4l2-subdev: stub
 v4l2_subdev_get_try_format() ..

Hi Lubomir,

  thanks for the patches

On Wed, Nov 28, 2018 at 06:19:13PM +0100, Lubomir Rintel wrote:
> Provide a dummy implementation when configured without
> CONFIG_VIDEO_V4L2_SUBDEV_API to avoid ifdef dance in the drivers that can
> be built either with or without the option.
>
> Suggested-by: Jacopo Mondi <jacopo@...ndi.org>
> Signed-off-by: Lubomir Rintel <lkundrak@...sk>
> ---
>  include/media/v4l2-subdev.h | 11 +++++++++++
>  1 file changed, 11 insertions(+)
>
> diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
> index 9102d6ca566e..906e28011bb4 100644
> --- a/include/media/v4l2-subdev.h
> +++ b/include/media/v4l2-subdev.h
> @@ -967,6 +967,17 @@ static inline struct v4l2_rect
>  		pad = 0;
>  	return &cfg[pad].try_compose;
>  }
> +
> +#else /* !defined(CONFIG_VIDEO_V4L2_SUBDEV_API) */
> +
> +static inline struct v4l2_mbus_framefmt
> +*v4l2_subdev_get_try_format(struct v4l2_subdev *sd,
> +			    struct v4l2_subdev_pad_config *cfg,
> +			    unsigned int pad)
> +{
> +	return ERR_PTR(-ENOTTY);
> +}
> +
>  #endif

While at there, what about doing the same for get_try_crop and
get_try_compose? At lease provide stubs, I let you figure out if
you're willing to fix callers too, it seems there are quite a few of
them though

$ git grep v4l2_subdev_get_try* drivers/media/ | grep -v '_format' | wc -l
44

>
>  extern const struct v4l2_file_operations v4l2_subdev_fops;
> --
> 2.19.1
>

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