This is an initial set of patches showing the approach I'm taking in order to fulfill all the MC needs that was discussed on the 3 day MC summit in Helsinki.
As suggested, I'll be sending incremental patches and avoiding to do a large set of changes into one changeset series.
So, this is the first 4 patches of the changes.
Along this patch series, I'll be calling "object" as anything "symbol" is part of the media graph. Currently: entity, link and pads.
New object types will be needed to represent interfaces. I suspect we'll also need another type to represent group of objects, but this will be covered on future patches.
No userspace API changes here, just changes at the internal structs that contains the media graph objects and some new helper functions.
The goal of this patchset is:
1) to create a common struct that will be embedded on all internal structs that represents the comon data that will be used by all kinds of objects;
2) to have an unique object ID for each object in the graph. The object ID will be needed by the userspace API in the future, as discussed during the MC workshop;
3) to be sure that no data used by an entity will be freed too early. Latter patches will do similar changes to links and pads.
With regards to (3), this patchset is not complete yet; it currently changes only the DVB core, as the changes are simpler there. I'll be working on a similar change for the V4L2 core. Yet, it would be nice to have a feedback earlier in order to avoid rework.
Mauro Carvalho Chehab (4): media: Add some fields to store graph objects media: Add a common embeed struct for all media graph objects media: add functions to create/remove entities dvbdev: Use functions to create/remove media_entity struct
drivers/media/dvb-core/dvbdev.c | 13 +++--- drivers/media/media-device.c | 4 ++ drivers/media/media-entity.c | 99 +++++++++++++++++++++++++++++++++++++++++ include/media/media-device.h | 4 ++ include/media/media-entity.h | 58 ++++++++++++++++++++++++ 5 files changed, 172 insertions(+), 6 deletions(-)