[RFC 10/11] v4l: subdev: add V4L2_SUBDEV_FL_MULTIPLEXED
From: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Date: 2021-05-07 12:37:08
Subsystem:
media input infrastructure (v4l/dvb), the rest · Maintainers:
Mauro Carvalho Chehab, Linus Torvalds
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@ideasonboard.com> --- 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 0acc2607b78c..f5cca45becf4 100644
--- a/drivers/media/v4l2-core/v4l2-subdev.c
+++ b/drivers/media/v4l2-core/v4l2-subdev.c@@ -1188,7 +1188,8 @@ 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 1c3de4a0606e..cc9953d88ce2 100644
--- a/include/media/v4l2-subdev.h
+++ b/include/media/v4l2-subdev.h@@ -900,6 +900,12 @@ 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