[PATCH v5 11/17] media: staging/imx: Loop through all registered subdevs for media links

From: Steve Longerbeam
Date: Fri Jun 29 2018 - 14:55:33 EST


The root imx-media notifier no longer sees all bound subdevices because
some of them will be bound to subdev notifiers. So imx_media_create_links()
now needs to loop through all subdevices registered with the v4l2-device,
not just the ones in the root notifier's done list. This should be safe
because imx_media_create_of_links() checks if a fwnode link already
exists before creating.

Signed-off-by: Steve Longerbeam <steve_longerbeam@xxxxxxxxxx>
---
drivers/staging/media/imx/imx-media-dev.c | 16 ++++++----------
1 file changed, 6 insertions(+), 10 deletions(-)

diff --git a/drivers/staging/media/imx/imx-media-dev.c b/drivers/staging/media/imx/imx-media-dev.c
index b0be80f..ae87c81 100644
--- a/drivers/staging/media/imx/imx-media-dev.c
+++ b/drivers/staging/media/imx/imx-media-dev.c
@@ -175,7 +175,7 @@ static int imx_media_subdev_bound(struct v4l2_async_notifier *notifier,
}

/*
- * create the media links for all subdevs that registered async.
+ * Create the media links for all subdevs that registered.
* Called after all async subdevs have bound.
*/
static int imx_media_create_links(struct v4l2_async_notifier *notifier)
@@ -184,14 +184,7 @@ static int imx_media_create_links(struct v4l2_async_notifier *notifier)
struct v4l2_subdev *sd;
int ret;

- /*
- * Only links are created between subdevices that are known
- * to the async notifier. If there are other non-async subdevices,
- * they were created internally by some subdevice (smiapp is one
- * example). In those cases it is expected the subdevice is
- * responsible for creating those internal links.
- */
- list_for_each_entry(sd, &notifier->done, async_list) {
+ list_for_each_entry(sd, &imxmd->v4l2_dev.subdevs, list) {
switch (sd->grp_id) {
case IMX_MEDIA_GRP_ID_VDIC:
case IMX_MEDIA_GRP_ID_IC_PRP:
@@ -211,7 +204,10 @@ static int imx_media_create_links(struct v4l2_async_notifier *notifier)
imx_media_create_csi_of_links(imxmd, sd);
break;
default:
- /* this is an external fwnode subdev */
+ /*
+ * if this subdev has fwnode links, create media
+ * links for them.
+ */
imx_media_create_of_links(imxmd, sd);
break;
}
--
2.7.4