From: Laurent Pinchart <laurent.pinchart@xxxxxxxxxx>
Add a new subdev operation to initialize a subdev pad config array, and
a helper function to allocate and initialize the array. This can be used
by bridge drivers to implement try format based on subdev pad
operations.
Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxx>
Acked-by: Vaibhav Hiremath <vaibhav.hiremath@xxxxxxxxxx>
Acked-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
---
drivers/media/v4l2-core/v4l2-subdev.c | 19 ++++++++++++++++++-
include/media/v4l2-subdev.h | 10 ++++++++++
2 files changed, 28 insertions(+), 1 deletion(-)
diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c
index d630838..f32ac0d 100644
--- a/drivers/media/v4l2-core/v4l2-subdev.c
+++ b/drivers/media/v4l2-core/v4l2-subdev.c
@@ -35,7 +35,7 @@
static int subdev_fh_init(struct v4l2_subdev_fh *fh, struct v4l2_subdev *sd)
{
#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
- fh->pad = kzalloc(sizeof(*fh->pad) * sd->entity.num_pads, GFP_KERNEL);
+ fh->pad = v4l2_subdev_alloc_pad_config(sd);
if (fh->pad == NULL)
return -ENOMEM;
#endif
@@ -569,6 +569,23 @@ int v4l2_subdev_link_validate(struct media_link *link)
sink, link, &source_fmt, &sink_fmt);
}
EXPORT_SYMBOL_GPL(v4l2_subdev_link_validate);
+
+struct v4l2_subdev_pad_config *v4l2_subdev_alloc_pad_config(struct v4l2_subdev *sd)
+{
+ struct v4l2_subdev_pad_config *cfg;
+
+ if (!sd->entity.num_pads)
+ return NULL;
+
+ cfg = kcalloc(sd->entity.num_pads, sizeof(*cfg), GFP_KERNEL);
+ if (!cfg)
+ return NULL;
+
+ v4l2_subdev_call(sd, pad, init_cfg, cfg);
+
+ return cfg;
+}
+EXPORT_SYMBOL_GPL(v4l2_subdev_alloc_pad_config);
#endif /* CONFIG_MEDIA_CONTROLLER */
void v4l2_subdev_init(struct v4l2_subdev *sd, const struct v4l2_subdev_ops *ops)
diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
index 11e2dfe..6c47cdd 100644
--- a/include/media/v4l2-subdev.h
+++ b/include/media/v4l2-subdev.h
@@ -607,6 +607,8 @@ struct v4l2_subdev_pad_config {
* may be adjusted by the subdev driver to device capabilities.
*/
struct v4l2_subdev_pad_ops {
+ void (*init_cfg)(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg);
int (*enum_mbus_code)(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_mbus_code_enum *code);
@@ -801,7 +803,15 @@ int v4l2_subdev_link_validate_default(struct v4l2_subdev *sd,
struct v4l2_subdev_format *source_fmt,
struct v4l2_subdev_format *sink_fmt);
int v4l2_subdev_link_validate(struct media_link *link);
+
+struct v4l2_subdev_pad_config *v4l2_subdev_alloc_pad_config(struct v4l2_subdev *sd);
+
+static inline void v4l2_subdev_free_pad_config(struct v4l2_subdev_pad_config *cfg)
+{
+ kfree(cfg);
+}
#endif /* CONFIG_MEDIA_CONTROLLER */
+
void v4l2_subdev_init(struct v4l2_subdev *sd,
const struct v4l2_subdev_ops *ops);
--
2.7.4
--
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