V4L/DVB: v4l2-common: Move v4l2_find_nearest_format from videodev2.h to v4l2-common.h

This function is an internal API and belongs in v4l2-common.h, not
videodev.h. The return pointer and probe argument should be const as well.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/v4l2-common.c

@@ -677,12 +677,13 @@ int v4l_fill_dv_preset_info(u32 preset, struct v4l2_dv_enum_preset *info)
 }
 EXPORT_SYMBOL_GPL(v4l_fill_dv_preset_info);
 
-struct v4l2_frmsize_discrete *v4l2_find_nearest_format(struct v4l2_discrete_probe *probe,
-						       s32 width, s32 height)
+const struct v4l2_frmsize_discrete *v4l2_find_nearest_format(
+		const struct v4l2_discrete_probe *probe,
+		s32 width, s32 height)
 {
 	int i;
 	u32 error, min_error = UINT_MAX;
-	struct v4l2_frmsize_discrete *size, *best = NULL;
+	const struct v4l2_frmsize_discrete *size, *best = NULL;
 
 	if (!probe)
 		return best;

include/linux/videodev2.h

@@ -397,14 +397,6 @@ struct v4l2_frmsize_discrete {
 	__u32			height;		/* Frame height [pixel] */
 };
 
-struct v4l2_discrete_probe {
-	const struct v4l2_frmsize_discrete	*sizes;
-	int					num_sizes;
-};
-
-struct v4l2_frmsize_discrete *v4l2_find_nearest_format(struct v4l2_discrete_probe *probe,
-						       s32 width, s32 height);
-
 struct v4l2_frmsize_stepwise {
 	__u32			min_width;	/* Minimum frame width [pixel] */
 	__u32			max_width;	/* Maximum frame width [pixel] */

include/media/v4l2-common.h

@@ -232,4 +232,14 @@ void v4l_bound_align_image(unsigned int *w, unsigned int wmin,
 			   unsigned int hmax, unsigned int halign,
 			   unsigned int salign);
 int v4l_fill_dv_preset_info(u32 preset, struct v4l2_dv_enum_preset *info);
+
+struct v4l2_discrete_probe {
+	const struct v4l2_frmsize_discrete	*sizes;
+	int					num_sizes;
+};
+
+const struct v4l2_frmsize_discrete *v4l2_find_nearest_format(
+		const struct v4l2_discrete_probe *probe,
+		s32 width, s32 height);
+
 #endif /* V4L2_COMMON_H_ */