Add V4L2_SUBDEV_FL_MULTIPLEXED, which indicates that the subdev supports
routing and per-stream configuration. These drivers do not need the old
pad based configuration, so we can skip the allocation in
v4l2_subdev_alloc_state().
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@xxxxxxxxxxxxxxxx>
---
drivers/media/v4l2-core/v4l2-subdev.c | 3 ++-
include/media/v4l2-subdev.h | 6 ++++++
2 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c
index 13cffe9d9b89..9138434a7a73 100644
--- a/drivers/media/v4l2-core/v4l2-subdev.c
+++ b/drivers/media/v4l2-core/v4l2-subdev.c
@@ -1199,7 +1199,8 @@ struct v4l2_subdev_state *v4l2_subdev_alloc_state(struct v4l2_subdev *sd)
goto err;
}
- if (sd->entity.num_pads) {
+ /* Drivers that support streams do not need the legacy pad config */
+ if (!(sd->flags & V4L2_SUBDEV_FL_MULTIPLEXED) && sd->entity.num_pads) {
state->pads = kvmalloc_array(sd->entity.num_pads,
sizeof(*state->pads),
GFP_KERNEL | __GFP_ZERO);
diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
index 973db58c2d9b..f448e7447ff5 100644
--- a/include/media/v4l2-subdev.h
+++ b/include/media/v4l2-subdev.h
@@ -914,6 +914,12 @@ struct v4l2_subdev_internal_ops {
* should set this flag.
*/
#define V4L2_SUBDEV_FL_HAS_EVENTS (1U << 3)
+/*
+ * Set this flag if this subdev supports multiplexed streams. This means
+ * that the driver supports routing and handles the stream parameter in its
+ * v4l2_subdev_pad_ops handlers.
+ */
+#define V4L2_SUBDEV_FL_MULTIPLEXED (1U << 4)
struct regulator_bulk_data;
--
2.25.1
