media: v4l2-subdev: Turn .[gs]_frame_interval into pad operations

The subdev .[gs]_frame_interval are video operations, but they operate
on pads (and even on streams). Not only is this confusing, it causes
practical issues for drivers as the operations don't receive a subdev
state pointer, requiring manual state handling.

To improve the situation, turn the operations into pad operations, and
extend them to receive a state pointer like other pad operations.

While at it, rename the operations to .[gs]et_frame_interval at the same
time to match the naming scheme of other pad operations. This isn't
strictly necessary, but given that all drivers using those operations
need to be modified, handling the rename separately would generate more
churn for very little gain (if at all).

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de> # for imx-media
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com> # for tegra-video
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

1 files changed, 36 insertions, 27 deletions

diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c
index 1fa1acfa5b7b..405a4a2fa565 100644
--- a/drivers/media/v4l2-core/v4l2-subdev.c
+++ b/drivers/media/v4l2-core/v4l2-subdev.c
@@ -245,29 +245,6 @@ static int call_enum_frame_size(struct v4l2_subdev *sd,
 	       sd->ops->pad->enum_frame_size(sd, state, fse);
 }
 
-static inline int check_frame_interval(struct v4l2_subdev *sd,
-				       struct v4l2_subdev_frame_interval *fi)
-{
-	if (!fi)
-		return -EINVAL;
-
-	return check_pad(sd, fi->pad);
-}
-
-static int call_g_frame_interval(struct v4l2_subdev *sd,
-				 struct v4l2_subdev_frame_interval *fi)
-{
-	return check_frame_interval(sd, fi) ? :
-	       sd->ops->video->g_frame_interval(sd, fi);
-}
-
-static int call_s_frame_interval(struct v4l2_subdev *sd,
-				 struct v4l2_subdev_frame_interval *fi)
-{
-	return check_frame_interval(sd, fi) ? :
-	       sd->ops->video->s_frame_interval(sd, fi);
-}
-
 static int call_enum_frame_interval(struct v4l2_subdev *sd,
 				    struct v4l2_subdev_state *state,
 				    struct v4l2_subdev_frame_interval_enum *fie)
@@ -307,6 +284,34 @@ static int call_set_selection(struct v4l2_subdev *sd,
 	       sd->ops->pad->set_selection(sd, state, sel);
 }
 
+static inline int check_frame_interval(struct v4l2_subdev *sd,
+				       struct v4l2_subdev_state *state,
+				       struct v4l2_subdev_frame_interval *fi)
+{
+	if (!fi)
+		return -EINVAL;
+
+	return check_pad(sd, fi->pad) ? :
+	       check_state(sd, state, V4L2_SUBDEV_FORMAT_ACTIVE, fi->pad,
+			   fi->stream);
+}
+
+static int call_get_frame_interval(struct v4l2_subdev *sd,
+				   struct v4l2_subdev_state *state,
+				   struct v4l2_subdev_frame_interval *fi)
+{
+	return check_frame_interval(sd, state, fi) ? :
+	       sd->ops->pad->get_frame_interval(sd, state, fi);
+}
+
+static int call_set_frame_interval(struct v4l2_subdev *sd,
+				   struct v4l2_subdev_state *state,
+				   struct v4l2_subdev_frame_interval *fi)
+{
+	return check_frame_interval(sd, state, fi) ? :
+	       sd->ops->pad->set_frame_interval(sd, state, fi);
+}
+
 static int call_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad,
 			       struct v4l2_mbus_frame_desc *fd)
 {
@@ -479,6 +484,8 @@ static const struct v4l2_subdev_pad_ops v4l2_subdev_call_pad_wrappers = {
 	.enum_frame_interval	= call_enum_frame_interval_state,
 	.get_selection		= call_get_selection_state,
 	.set_selection		= call_set_selection_state,
+	.get_frame_interval	= call_get_frame_interval,
+	.set_frame_interval	= call_set_frame_interval,
 	.get_edid		= call_get_edid,
 	.set_edid		= call_set_edid,
 	.dv_timings_cap		= call_dv_timings_cap,
@@ -488,8 +495,6 @@ static const struct v4l2_subdev_pad_ops v4l2_subdev_call_pad_wrappers = {
 };
 
 static const struct v4l2_subdev_video_ops v4l2_subdev_call_video_wrappers = {
-	.g_frame_interval	= call_g_frame_interval,
-	.s_frame_interval	= call_s_frame_interval,
 	.s_stream		= call_s_stream,
 };
 
@@ -531,6 +536,10 @@ subdev_ioctl_get_state(struct v4l2_subdev *sd, struct v4l2_subdev_fh *subdev_fh,
 	case VIDIOC_SUBDEV_S_SELECTION:
 		which = ((struct v4l2_subdev_selection *)arg)->which;
 		break;
+	case VIDIOC_SUBDEV_G_FRAME_INTERVAL:
+	case VIDIOC_SUBDEV_S_FRAME_INTERVAL:
+		which = V4L2_SUBDEV_FORMAT_ACTIVE;
+		break;
 	case VIDIOC_SUBDEV_G_ROUTING:
 	case VIDIOC_SUBDEV_S_ROUTING:
 		which = ((struct v4l2_subdev_routing *)arg)->which;
@@ -781,7 +790,7 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg,
 			fi->stream = 0;
 
 		memset(fi->reserved, 0, sizeof(fi->reserved));
-		return v4l2_subdev_call(sd, video, g_frame_interval, arg);
+		return v4l2_subdev_call(sd, pad, get_frame_interval, state, fi);
 	}
 
 	case VIDIOC_SUBDEV_S_FRAME_INTERVAL: {
@@ -794,7 +803,7 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg,
 			fi->stream = 0;
 
 		memset(fi->reserved, 0, sizeof(fi->reserved));
-		return v4l2_subdev_call(sd, video, s_frame_interval, arg);
+		return v4l2_subdev_call(sd, pad, set_frame_interval, state, fi);
 	}
 
 	case VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL: {