linux-kernel - Re: [PATCH] media: v4l2-subdev.h: drop the guard CONFIG_VIDEO_V4L2_SUBDEV_API for v4l2_subdev_get_try

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Date:	Mon, 17 Nov 2014 12:53:39 +0200
From:	Sakari Ailus <sakari.ailus@...ux.intel.com>
To:	"Lad, Prabhakar" <prabhakar.csengg@...il.com>,
	linux-media@...r.kernel.org, Hans Verkuil <hans.verkuil@...co.com>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>
CC:	linux-kernel@...r.kernel.org,
	Mauro Carvalho Chehab <m.chehab@...sung.com>
Subject: Re: [PATCH] media: v4l2-subdev.h: drop the guard
 CONFIG_VIDEO_V4L2_SUBDEV_API for v4l2_subdev_get_try_*()

Hi Prabhakar,

Thank you for the patch.

Lad, Prabhakar wrote:
> this patch removes the guard CONFIG_VIDEO_V4L2_SUBDEV_API
> for v4l2_subdev_get_try_*() functions.
> In cases where a subdev using v4l2_subdev_get_try_*() calls
> internally and the bridge using subdev pad ops which is
> not MC aware forces to select MEDIA_CONTROLLER, as
> VIDEO_V4L2_SUBDEV_API is dependent on it.
>
> Signed-off-by: Lad, Prabhakar <prabhakar.csengg@...il.com>
> ---
>   include/media/v4l2-subdev.h | 2 --
>   1 file changed, 2 deletions(-)
>
> diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
> index 5860292..076ca11 100644
> --- a/include/media/v4l2-subdev.h
> +++ b/include/media/v4l2-subdev.h
> @@ -642,7 +642,6 @@ struct v4l2_subdev_fh {
>   #define to_v4l2_subdev_fh(fh)	\
>   	container_of(fh, struct v4l2_subdev_fh, vfh)
>
> -#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)

Wouldn't you need to drop these from struct v4l2_subdev_fh as well? The 
code won't compile if the fields aren't there.

>   #define __V4L2_SUBDEV_MK_GET_TRY(rtype, fun_name, field_name)		\
>   	static inline struct rtype *					\
>   	v4l2_subdev_get_try_##fun_name(struct v4l2_subdev_fh *fh,	\
> @@ -656,7 +655,6 @@ struct v4l2_subdev_fh {
>   __V4L2_SUBDEV_MK_GET_TRY(v4l2_mbus_framefmt, format, try_fmt)
>   __V4L2_SUBDEV_MK_GET_TRY(v4l2_rect, crop, try_crop)
>   __V4L2_SUBDEV_MK_GET_TRY(v4l2_rect, compose, try_compose)
> -#endif
>
>   extern const struct v4l2_file_operations v4l2_subdev_fops;
>
>

-- 
Kind regards,

Sakari Ailus
sakari.ailus@...ux.intel.com
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