media: v4l2-subdev: Store frame interval in subdev state

Subdev states store all standard pad configuration data, except for
frame intervals. Fix it by adding interval fields in the
v4l2_subdev_pad_config and v4l2_subdev_stream_config structures, with
corresponding accessor functions and a helper function to implement the
.get_frame_interval() operation.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

1 files changed, 52 insertions, 0 deletions

diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c
index 30131a37f2d5..4c6198c48dd6 100644
--- a/drivers/media/v4l2-core/v4l2-subdev.c
+++ b/drivers/media/v4l2-core/v4l2-subdev.c
@@ -1652,6 +1652,42 @@ __v4l2_subdev_state_get_compose(struct v4l2_subdev_state *state,
 }
 EXPORT_SYMBOL_GPL(__v4l2_subdev_state_get_compose);
 
+struct v4l2_fract *
+__v4l2_subdev_state_get_interval(struct v4l2_subdev_state *state,
+				 unsigned int pad, u32 stream)
+{
+	struct v4l2_subdev_stream_configs *stream_configs;
+	unsigned int i;
+
+	if (WARN_ON(!state))
+		return NULL;
+
+	lockdep_assert_held(state->lock);
+
+	if (state->pads) {
+		if (stream)
+			return NULL;
+
+		if (pad >= state->sd->entity.num_pads)
+			return NULL;
+
+		return &state->pads[pad].interval;
+	}
+
+	lockdep_assert_held(state->lock);
+
+	stream_configs = &state->stream_configs;
+
+	for (i = 0; i < stream_configs->num_configs; ++i) {
+		if (stream_configs->configs[i].pad == pad &&
+		    stream_configs->configs[i].stream == stream)
+			return &stream_configs->configs[i].interval;
+	}
+
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(__v4l2_subdev_state_get_interval);
+
 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
 
 static int
@@ -1718,6 +1754,22 @@ int v4l2_subdev_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_state *state,
 }
 EXPORT_SYMBOL_GPL(v4l2_subdev_get_fmt);
 
+int v4l2_subdev_get_frame_interval(struct v4l2_subdev *sd,
+				   struct v4l2_subdev_state *state,
+				   struct v4l2_subdev_frame_interval *fi)
+{
+	struct v4l2_fract *interval;
+
+	interval = v4l2_subdev_state_get_interval(state, fi->pad, fi->stream);
+	if (!interval)
+		return -EINVAL;
+
+	fi->interval = *interval;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_subdev_get_frame_interval);
+
 int v4l2_subdev_set_routing(struct v4l2_subdev *sd,
 			    struct v4l2_subdev_state *state,
 			    const struct v4l2_subdev_krouting *routing)