[PATCH v5 05/22] media: rzg2l-cru: csi2: Implement .get_frame_desc()

Prabhakar
2024-10-11T17:31:05Z

The RZ/G2L CRU requires information about which VCx to process data from,
among the four available VCs. To obtain this information, the
.get_frame_desc() routine is implemented. This routine, in turn, calls
.get_frame_desc() on the remote sensor connected to the CSI2 bridge.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
.../platform/renesas/rzg2l-cru/rzg2l-csi2.c | 20 +++++++++++++++++++
1 file changed, 20 insertions(+)

diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-csi2.c b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-csi2.c
index abacf53b944c..3fd0be6a3b65 100644
--- a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-csi2.c
+++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-csi2.c
@@ -582,6 +582,25 @@ static int rzg2l_csi2_enum_frame_size(struct v4l2_subdev *sd,
return 0;
}

+static int rzg2l_csi2_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad,
+ struct v4l2_mbus_frame_desc *fd)
+{
+ struct rzg2l_csi2 *csi2 = sd_to_csi2(sd);
+ struct media_pad *remote_pad;
+
+ if (!csi2->remote_source)
+ return -ENODEV;
+
+ remote_pad = media_pad_remote_pad_unique(&csi2->pads[RZG2L_CSI2_SINK]);
+ if (IS_ERR(remote_pad)) {
+ dev_err(csi2->dev, "can't get source pad of %s (%ld)\n",
+ csi2->remote_source->name, PTR_ERR(remote_pad));
+ return PTR_ERR(remote_pad);
+ }
+ return v4l2_subdev_call(csi2->remote_source, pad, get_frame_desc,
+ remote_pad->index, fd);
+}
+
static const struct v4l2_subdev_video_ops rzg2l_csi2_video_ops = {
.s_stream = rzg2l_csi2_s_stream,
.pre_streamon = rzg2l_csi2_pre_streamon,
@@ -593,6 +612,7 @@ static const struct v4l2_subdev_pad_ops rzg2l_csi2_pad_ops = {
.enum_frame_size = rzg2l_csi2_enum_frame_size,
.set_fmt = rzg2l_csi2_set_format,
.get_fmt = v4l2_subdev_get_fmt,
+ .get_frame_desc = rzg2l_csi2_get_frame_desc,
};

static const struct v4l2_subdev_ops rzg2l_csi2_subdev_ops = {
--
2.43.0