[PATCH v5 18/22] media: rzg2l-cru: video: Implement .link_validate() callback

Prabhakar
2024-10-11T17:31:21Z

Implement the `.link_validate()` callback for the video node and move the
format checking into this function. This change allows the removal of
`rzg2l_cru_mc_validate_format()`.

Suggested-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
.../platform/renesas/rzg2l-cru/rzg2l-video.c | 82 +++++++++----------
1 file changed, 38 insertions(+), 44 deletions(-)

diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c
index 0cc69a7440bf..df6114cbe5c7 100644
--- a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c
+++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c
@@ -189,46 +189,6 @@ static void rzg2l_cru_buffer_queue(struct vb2_buffer *vb)
spin_unlock_irqrestore(&cru->qlock, flags);
}

-static int rzg2l_cru_mc_validate_format(struct rzg2l_cru_dev *cru,
- struct v4l2_subdev *sd,
- struct media_pad *pad)
-{
- struct v4l2_subdev_format fmt = {
- .which = V4L2_SUBDEV_FORMAT_ACTIVE,
- };
-
- fmt.pad = pad->index;
- if (v4l2_subdev_call_state_active(sd, pad, get_fmt, &fmt))
- return -EPIPE;
-
- switch (fmt.format.code) {
- case MEDIA_BUS_FMT_UYVY8_1X16:
- break;
- default:
- return -EPIPE;
- }
-
- switch (fmt.format.field) {
- case V4L2_FIELD_TOP:
- case V4L2_FIELD_BOTTOM:
- case V4L2_FIELD_NONE:
- case V4L2_FIELD_INTERLACED_TB:
- case V4L2_FIELD_INTERLACED_BT:
- case V4L2_FIELD_INTERLACED:
- case V4L2_FIELD_SEQ_TB:
- case V4L2_FIELD_SEQ_BT:
- break;
- default:
- return -EPIPE;
- }
-
- if (fmt.format.width != cru->format.width ||
- fmt.format.height != cru->format.height)
- return -EPIPE;
-
- return 0;
-}
-
static void rzg2l_cru_set_slot_addr(struct rzg2l_cru_dev *cru,
int slot, dma_addr_t addr)
{
@@ -532,10 +492,6 @@ static int rzg2l_cru_set_stream(struct rzg2l_cru_dev *cru, int on)
return stream_off_ret;
}

- ret = rzg2l_cru_mc_validate_format(cru, sd, pad);
- if (ret)
- return ret;
-
pipe = media_entity_pipeline(&sd->entity) ? : &cru->vdev.pipe;
ret = video_device_pipeline_start(&cru->vdev, pipe);
if (ret)
@@ -986,6 +942,43 @@ static const struct v4l2_file_operations rzg2l_cru_fops = {
.read = vb2_fop_read,
};

+/* -----------------------------------------------------------------------------
+ * Media entity operations
+ */
+
+static int rzg2l_cru_video_link_validate(struct media_link *link)
+{
+ struct v4l2_subdev_format fmt = {
+ .which = V4L2_SUBDEV_FORMAT_ACTIVE,
+ };
+ const struct rzg2l_cru_ip_format *video_fmt;
+ struct v4l2_subdev *subdev;
+ struct rzg2l_cru_dev *cru;
+ int ret;
+
+ subdev = media_entity_to_v4l2_subdev(link->source->entity);
+ fmt.pad = link->source->index;
+ ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
+ if (ret < 0)
+ return ret == -ENOIOCTLCMD ? -EINVAL : ret;
+
+ cru = container_of(media_entity_to_video_device(link->sink->entity),
+ struct rzg2l_cru_dev, vdev);
+ video_fmt = rzg2l_cru_ip_format_to_fmt(cru->format.pixelformat);
+
+ if (fmt.format.width != cru->format.width ||
+ fmt.format.height != cru->format.height ||
+ fmt.format.field != cru->format.field ||
+ video_fmt->code != fmt.format.code)
+ return -EPIPE;
+
+ return 0;
+}
+
+static const struct media_entity_operations rzg2l_cru_video_media_ops = {
+ .link_validate = rzg2l_cru_video_link_validate,
+};
+
static void rzg2l_cru_v4l2_init(struct rzg2l_cru_dev *cru)
{
struct video_device *vdev = &cru->vdev;
@@ -997,6 +990,7 @@ static void rzg2l_cru_v4l2_init(struct rzg2l_cru_dev *cru)
vdev->lock = &cru->lock;
vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
vdev->device_caps |= V4L2_CAP_IO_MC;
+ vdev->entity.ops = &rzg2l_cru_video_media_ops;
vdev->fops = &rzg2l_cru_fops;
vdev->ioctl_ops = &rzg2l_cru_ioctl_ops;

--
2.43.0