[PATCH/RFC v2 12/15] adv748x: csi2: switch to pad and stream aware s_stream

["Niklas Söderlund" <niklas.soderlund+renesas@ragnatech.se>]

Switch the driver to implement the pad and stream aware s_stream
operation. This is needed to enable to support to start and stop
individual streams on a multiplexed pad.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
---
 drivers/media/i2c/adv748x/adv748x-csi2.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/drivers/media/i2c/adv748x/adv748x-csi2.c b/drivers/media/i2c/adv748x/adv748x-csi2.c
index a43b251d0bc67a43..39f993282dd3bb5c 100644
--- a/drivers/media/i2c/adv748x/adv748x-csi2.c
+++ b/drivers/media/i2c/adv748x/adv748x-csi2.c
@@ -128,22 +128,26 @@ static const struct v4l2_subdev_internal_ops adv748x_csi2_internal_ops = {
  * v4l2_subdev_video_ops
  */
 
-static int adv748x_csi2_s_stream(struct v4l2_subdev *sd, int enable)
+static int adv748x_csi2_s_stream(struct v4l2_subdev *sd, unsigned int pad,
+				 unsigned int stream, int enable)
 {
 	struct adv748x_csi2 *tx = adv748x_sd_to_csi2(sd);
+	struct adv748x_state *state = tx->state;
 	struct v4l2_subdev *src;
 
+	if (pad != ADV748X_CSI2_SOURCE || stream != 0)
+		return -EINVAL;
+
 	src = adv748x_get_remote_sd(&tx->pads[ADV748X_CSI2_SINK]);
 	if (!src)
 		return -EPIPE;
 
+	adv_dbg(state, "%s: pad: %u stream: %u enable: %d\n", sd->name,
+		pad, stream, enable);
+
 	return v4l2_subdev_call(src, video, s_stream, enable);
 }
 
-static const struct v4l2_subdev_video_ops adv748x_csi2_video_ops = {
-	.s_stream = adv748x_csi2_s_stream,
-};
-
 /* -----------------------------------------------------------------------------
  * v4l2_subdev_pad_ops
  *
@@ -256,6 +260,7 @@ static const struct v4l2_subdev_pad_ops adv748x_csi2_pad_ops = {
 	.get_fmt = adv748x_csi2_get_format,
 	.set_fmt = adv748x_csi2_set_format,
 	.get_frame_desc = adv748x_csi2_get_frame_desc,
+	.s_stream = adv748x_csi2_s_stream,
 };
 
 /* -----------------------------------------------------------------------------
@@ -263,7 +268,6 @@ static const struct v4l2_subdev_pad_ops adv748x_csi2_pad_ops = {
  */
 
 static const struct v4l2_subdev_ops adv748x_csi2_ops = {
-	.video = &adv748x_csi2_video_ops,
 	.pad = &adv748x_csi2_pad_ops,
 };
 
-- 
2.15.1