Hi Marco, FYI we've been there already: https://patchwork.kernel.org/patch/10703029/
and that ended with Hans' patch: https://patchwork.linuxtv.org/patch/53370/ which didn't get far unfortunately. On Tue, Jan 29, 2019 at 05:07:54PM +0100, Marco Felsch wrote: > In case of missing CONFIG_VIDEO_V4L2_SUBDEV_API those helpers aren't > available. So each driver have to add ifdefs around those helpers or > add the CONFIG_VIDEO_V4L2_SUBDEV_API as dependcy. > > Make these helpers available in case of CONFIG_VIDEO_V4L2_SUBDEV_API > isn't set to avoid ifdefs. This approach is less error prone too. > > Signed-off-by: Marco Felsch <m.fel...@pengutronix.de> > --- > include/media/v4l2-subdev.h | 15 ++++++++++++--- > 1 file changed, 12 insertions(+), 3 deletions(-) > > diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h > index 47af609dc8f1..90c9a301d72a 100644 > --- a/include/media/v4l2-subdev.h > +++ b/include/media/v4l2-subdev.h > @@ -916,8 +916,6 @@ 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) > - > /** > * v4l2_subdev_get_try_format - ancillary routine to call > * &struct v4l2_subdev_pad_config->try_fmt > @@ -931,9 +929,13 @@ static inline struct v4l2_mbus_framefmt > struct v4l2_subdev_pad_config *cfg, > unsigned int pad) > { > +#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) > if (WARN_ON(pad >= sd->entity.num_pads)) > pad = 0; > return &cfg[pad].try_fmt; > +#else > + return NULL; Since Hans' attempt didn't succeed, maybe we want to reconsider this approach? I liked Lubomir's version better, but in any case, small details... Shouldn't you return ERR_PTR(-ENOTTY) here instead of NULL ? + Sakari, Hans: Alternatively, what if we add CONFIG_VIDEO_V4L2_SUBDEV_API as a dependency of all sensor drivers that still use the #ifdef CONFIG_VIDEO_V4L2_SUBDEV_API v4l2_subdev_get_try_format(sd, cfg, format->pad); #else -ENOTTY #endif pattern so we could remove that block #ifdef blocks and do not touch the v4l2-subdev.h header? Should I send a patch? Thanks j > +#endif > } > > /** > @@ -949,9 +951,13 @@ static inline struct v4l2_rect > struct v4l2_subdev_pad_config *cfg, > unsigned int pad) > { > +#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) > if (WARN_ON(pad >= sd->entity.num_pads)) > pad = 0; > return &cfg[pad].try_crop; > +#else > + return NULL; > +#endif > } > > /** > @@ -967,11 +973,14 @@ static inline struct v4l2_rect > struct v4l2_subdev_pad_config *cfg, > unsigned int pad) > { > +#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) > if (WARN_ON(pad >= sd->entity.num_pads)) > pad = 0; > return &cfg[pad].try_compose; > -} > +#else > + return NULL; > #endif > +} > > extern const struct v4l2_file_operations v4l2_subdev_fops; > > -- > 2.20.1 >
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