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media: sun6i-csi: Add bridge v4l2 subdev with port management

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Introduce a bridge v4l2 subdev to prepare for separation between the
processing part (bridge) and the dma engine, which is required to
properly support ths isp workflow later on.

Currently the bridge just manages fwnode mapping to media pads,
using an async notifier (which was previously in the main code).
The s_stream video op just forwards to the connected v4l2 subdev
(sensor or MIPI CSI-2 bridge).

The video capture device is now registered after the bridge and
attaches to it with a media link.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
This commit is contained in:
Paul Kocialkowski 2022-11-03 16:30:46 +00:00 • committed by Mauro Carvalho Chehab
commit 0d2b746b1b
6 changed files with 548 additions and 139 deletions
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