As discussed on IRC, memory-to-memory need to be modeled
properly in order to be supported by the media controller
framework, and thus to support the Request API.
The topology looks like this:
Device topology
- entity 1: source (1 pad, 1 link)
type Node subtype V4L flags 0
pad0: Source
<- "proc":0 [ENABLED,IMMUTABLE]
- entity 3: proc (2 pads, 2 links)
type Node subtype Unknown flags 0
pad0: Source
-> "source":0 [ENABLED,IMMUTABLE]
pad1: Sink
<- "sink":0 [ENABLED,IMMUTABLE]
- entity 6: sink (1 pad, 1 link)
type Node subtype V4L flags 0
pad0: Sink
-> "proc":1 [ENABLED,IMMUTABLE]
The first commit introduces a register/unregister API,
that creates/destroys all the entities and pads needed,
and links them.
The second commit uses this API to support the vim2m driver.
Ezequiel Garcia (1):
media: add helpers for memory-to-memory media controller
Hans Verkuil (1):
vim2m: add media device
drivers/media/platform/vim2m.c | 41 +++++-
drivers/media/v4l2-core/v4l2-dev.c | 13 +-
drivers/media/v4l2-core/v4l2-mem2mem.c | 176 +++++++++++++++++++++++++
include/media/v4l2-mem2mem.h | 5 +
include/uapi/linux/media.h | 3 +
5 files changed, 229 insertions(+), 9 deletions(-)
--
2.17.1
