Hi Steve,

On Sat, Feb 15, 2020 at 11:41:21AM -0800, Steve Longerbeam wrote:

Instead of allocating a notifier in v4l2_async_register_fwnode_subdev(),
have the caller provide one. This allows the caller to implement
notifier ops (bind, unbind).

The caller is now responsible for first initializing its notifier with a
call to v4l2_async_notifier_init().

Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>

Instead of improving v4l2_async_register_fwnode_subdev(), could you convert
the users (IMX driver in this case) to call the preferred APIs instead? As
the lines below show, v4l2_async_register_fwnode_subdev() has only two
users left --- the other one of which is the IMX driver. After converting
these two, we could just remove this API.

See e.g. drivers/media/pci/intel/ipu3/ipu3-cio2.c and
drivers/media/platform/omap3isp/isp.c for examples.

---
Changes in v3:
- added the missing calls to unregister/cleanup the new subdev notifiers.
  Reported by Rui Silva.
---
 drivers/media/platform/video-mux.c         |  8 +++++++-
 drivers/media/v4l2-core/v4l2-fwnode.c      | 11 +----------
 drivers/staging/media/imx/imx6-mipi-csi2.c |  7 ++++++-
 drivers/staging/media/imx/imx7-media-csi.c |  7 ++++++-
 drivers/staging/media/imx/imx7-mipi-csis.c |  9 ++++++++-
 include/media/v4l2-fwnode.h                | 12 ++++++++----
 6 files changed, 36 insertions(+), 18 deletions(-)

-- 
Kind regards,

Sakari Ailus

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