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 10:56:31 +0000
From:	Prabhakar Lad <prabhakar.csengg@...il.com>
To:	Sakari Ailus <sakari.ailus@...ux.intel.com>
Cc:	linux-media <linux-media@...r.kernel.org>,
	Hans Verkuil <hans.verkuil@...co.com>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	LKML <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 Sakari,

On Mon, Nov 17, 2014 at 10:53 AM, Sakari Ailus
<sakari.ailus@...ux.intel.com> wrote:
> 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.
>
Ah missed it, thanks for the catch!

Thanks,
--Prabhakar Lad

>>   #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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