From: Hans Verkuil <hans.verk...@cisco.com>
When a new subdevice is registered this new function is called to allocate
and initialize a pad_config array. This allows bridge drivers to use the
pad ops that require such an array as argument.
Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
---
drivers/media/v4l2-core/v4l2-device.c | 11 ++++++++++-
drivers/media/v4l2-core/v4l2-subdev.c | 36 +++++++++++++++++++++++++++++++++++
include/media/v4l2-subdev.h | 4 ++++
3 files changed, 50 insertions(+), 1 deletion(-)
diff --git a/drivers/media/v4l2-core/v4l2-device.c
b/drivers/media/v4l2-core/v4l2-device.c
index 015f92a..5c8d402 100644
--- a/drivers/media/v4l2-core/v4l2-device.c
+++ b/drivers/media/v4l2-core/v4l2-device.c
@@ -183,12 +183,16 @@ int v4l2_device_register_subdev(struct v4l2_device
*v4l2_dev,
if (err)
goto error_unregister;
+ err = v4l2_subdev_create_pad_configs(sd);
+ if (err)
+ goto error_unregister;
+
#if defined(CONFIG_MEDIA_CONTROLLER)
/* Register the entity. */
if (v4l2_dev->mdev) {
err = media_device_register_entity(v4l2_dev->mdev, entity);
if (err < 0)
- goto error_unregister;
+ goto error_free_pad_configs;
}
#endif
@@ -198,6 +202,9 @@ int v4l2_device_register_subdev(struct v4l2_device
*v4l2_dev,
return 0;
+error_free_pad_configs:
+ kfree(sd->pad_configs);
+ sd->pad_configs = NULL;
error_unregister:
if (sd->internal_ops && sd->internal_ops->unregistered)
sd->internal_ops->unregistered(sd);
@@ -282,6 +289,8 @@ void v4l2_device_unregister_subdev(struct v4l2_subdev *sd)
if (sd->internal_ops && sd->internal_ops->unregistered)
sd->internal_ops->unregistered(sd);
+ kfree(sd->pad_configs);
+ sd->pad_configs = NULL;
sd->v4l2_dev = NULL;
#if defined(CONFIG_MEDIA_CONTROLLER)
diff --git a/drivers/media/v4l2-core/v4l2-subdev.c
b/drivers/media/v4l2-core/v4l2-subdev.c
index 3c8b198..a7b874e 100644
--- a/drivers/media/v4l2-core/v4l2-subdev.c
+++ b/drivers/media/v4l2-core/v4l2-subdev.c
@@ -560,6 +560,41 @@ int v4l2_subdev_link_validate(struct media_link *link)
EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate);
#endif /* CONFIG_MEDIA_CONTROLLER */
+int v4l2_subdev_create_pad_configs(struct v4l2_subdev *sd)
+{
+#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
+ struct v4l2_subdev_format fmt = {
+ .which = V4L2_SUBDEV_FORMAT_ACTIVE,
+ };
+ unsigned pads = sd->entity.num_pads;
+ unsigned pad;
+ int err;
+
+ if (pads == 0)
+ return 0;
+ sd->pad_configs = kcalloc(pads, sizeof(*sd->pad_configs), GFP_KERNEL);
+ if (sd->pad_configs == NULL)
+ return -ENOMEM;
+ for (pad = 0; pad < pads; pad++) {
+ fmt.pad = pad;
+ err = v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt);
+
+ if (err && err != -ENOIOCTLCMD) {
+ kfree(sd->pad_configs);
+ sd->pad_configs = NULL;
+ return err;
+ }
+ sd->pad_configs[pad].try_fmt = fmt.format;
+ sd->pad_configs[pad].try_crop.width = fmt.format.width;
+ sd->pad_configs[pad].try_crop.height = fmt.format.height;
+ sd->pad_configs[pad].try_compose.width = fmt.format.width;
+ sd->pad_configs[pad].try_compose.height = fmt.format.height;
+ }
+#endif
+ return 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_subdev_create_pad_configs);
+
void v4l2_subdev_init(struct v4l2_subdev *sd, const struct v4l2_subdev_ops
*ops)
{
INIT_LIST_HEAD(&sd->list);
@@ -571,6 +606,7 @@ void v4l2_subdev_init(struct v4l2_subdev *sd, const struct
v4l2_subdev_ops *ops)
sd->grp_id = 0;
sd->dev_priv = NULL;
sd->host_priv = NULL;
+ sd->pad_configs = NULL;
#if defined(CONFIG_MEDIA_CONTROLLER)
sd->entity.name = sd->name;
sd->entity.type = MEDIA_ENT_T_V4L2_SUBDEV;
diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
index 175dc4f..e9e8b15 100644
--- a/include/media/v4l2-subdev.h
+++ b/include/media/v4l2-subdev.h
@@ -611,6 +611,8 @@ struct v4l2_subdev {
char name[V4L2_SUBDEV_NAME_SIZE];
/* can be used to group similar subdevs, value is driver-specific */
u32 grp_id;
+ /* Used by bridge drivers to allocate a pad config array */
+ struct v4l2_subdev_pad_config *pad_configs;
/* pointer to private data */
void *dev_priv;
void *host_priv;
@@ -689,6 +691,8 @@ int v4l2_subdev_link_validate_default(struct v4l2_subdev
*sd,
struct v4l2_subdev_format *sink_fmt);
int v4l2_subdev_link_validate(struct media_link *link);
#endif /* CONFIG_MEDIA_CONTROLLER */
+
+int v4l2_subdev_create_pad_configs(struct v4l2_subdev *sd);
void v4l2_subdev_init(struct v4l2_subdev *sd,
const struct v4l2_subdev_ops *ops);
--
2.1.3
--
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