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>

2 files changed, 14 insertions, 12 deletions

diff --git a/include/media/v4l2-common.h b/include/media/v4l2-common.h
index d278836fd9cb..acf5be24a5ca 100644
--- a/include/media/v4l2-common.h
+++ b/include/media/v4l2-common.h
@@ -425,7 +425,7 @@ __v4l2_find_nearest_size(const void *array, size_t array_size,
 
 /**
  * v4l2_g_parm_cap - helper routine for vidioc_g_parm to fill this in by
- *      calling the g_frame_interval op of the given subdev. It only works
+ *      calling the get_frame_interval op of the given subdev. It only works
  *      for V4L2_BUF_TYPE_VIDEO_CAPTURE(_MPLANE), hence the _cap in the
  *      function name.
  *
@@ -438,7 +438,7 @@ int v4l2_g_parm_cap(struct video_device *vdev,
 
 /**
  * v4l2_s_parm_cap - helper routine for vidioc_s_parm to fill this in by
- *      calling the s_frame_interval op of the given subdev. It only works
+ *      calling the set_frame_interval op of the given subdev. It only works
  *      for V4L2_BUF_TYPE_VIDEO_CAPTURE(_MPLANE), hence the _cap in the
  *      function name.
  *
diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
index 61024a74ce38..0ab7dce098e6 100644
--- a/include/media/v4l2-subdev.h
+++ b/include/media/v4l2-subdev.h
@@ -452,12 +452,6 @@ enum v4l2_subdev_pre_streamon_flags {
  *
  * @g_pixelaspect: callback to return the pixelaspect ratio.
  *
- * @g_frame_interval: callback for VIDIOC_SUBDEV_G_FRAME_INTERVAL()
- *		      ioctl handler code.
- *
- * @s_frame_interval: callback for VIDIOC_SUBDEV_S_FRAME_INTERVAL()
- *		      ioctl handler code.
- *
  * @s_dv_timings: Set custom dv timings in the sub device. This is used
  *	when sub device is capable of setting detailed timing information
  *	in the hardware to generate/detect the video signal.
@@ -496,10 +490,6 @@ struct v4l2_subdev_video_ops {
 	int (*g_input_status)(struct v4l2_subdev *sd, u32 *status);
 	int (*s_stream)(struct v4l2_subdev *sd, int enable);
 	int (*g_pixelaspect)(struct v4l2_subdev *sd, struct v4l2_fract *aspect);
-	int (*g_frame_interval)(struct v4l2_subdev *sd,
-				struct v4l2_subdev_frame_interval *interval);
-	int (*s_frame_interval)(struct v4l2_subdev *sd,
-				struct v4l2_subdev_frame_interval *interval);
 	int (*s_dv_timings)(struct v4l2_subdev *sd,
 			struct v4l2_dv_timings *timings);
 	int (*g_dv_timings)(struct v4l2_subdev *sd,
@@ -787,6 +777,12 @@ struct v4l2_subdev_state {
  *
  * @set_selection: callback for VIDIOC_SUBDEV_S_SELECTION() ioctl handler code.
  *
+ * @get_frame_interval: callback for VIDIOC_SUBDEV_G_FRAME_INTERVAL()
+ *			ioctl handler code.
+ *
+ * @set_frame_interval: callback for VIDIOC_SUBDEV_S_FRAME_INTERVAL()
+ *			ioctl handler code.
+ *
  * @get_edid: callback for VIDIOC_SUBDEV_G_EDID() ioctl handler code.
  *
  * @set_edid: callback for VIDIOC_SUBDEV_S_EDID() ioctl handler code.
@@ -856,6 +852,12 @@ struct v4l2_subdev_pad_ops {
 	int (*set_selection)(struct v4l2_subdev *sd,
 			     struct v4l2_subdev_state *state,
 			     struct v4l2_subdev_selection *sel);
+	int (*get_frame_interval)(struct v4l2_subdev *sd,
+				  struct v4l2_subdev_state *state,
+				  struct v4l2_subdev_frame_interval *interval);
+	int (*set_frame_interval)(struct v4l2_subdev *sd,
+				  struct v4l2_subdev_state *state,
+				  struct v4l2_subdev_frame_interval *interval);
 	int (*get_edid)(struct v4l2_subdev *sd, struct v4l2_edid *edid);
 	int (*set_edid)(struct v4l2_subdev *sd, struct v4l2_edid *edid);
 	int (*dv_timings_cap)(struct v4l2_subdev *sd,