[PATCH v3 17/17] media: imx: TODO: Remove media link creation todos

From: Steve Longerbeam <slongerbeam@gmail.com>
To: linux-media@vger.kernel.org, Rui Miguel Silva <rmfrfs@gmail.com>,
	Philipp Zabel <p.zabel@pengutronix.de>
Cc: Steve Longerbeam <slongerbeam@gmail.com>,
	Mauro Carvalho Chehab <mchehab@kernel.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Shawn Guo <shawnguo@kernel.org>,
	Sascha Hauer <s.hauer@pengutronix.de>,
	Pengutronix Kernel Team <kernel@pengutronix.de>,
	Fabio Estevam <festevam@gmail.com>,
	NXP Linux Team <linux-imx@nxp.com>,
	devel@driverdev.osuosl.org (open list:STAGING SUBSYSTEM),
	linux-arm-kernel@lists.infradead.org (moderated
	list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE),
	linux-kernel@vger.kernel.org (open list)
Subject: [PATCH v3 17/17] media: imx: TODO: Remove media link creation todos
Date: Tue,  4 Feb 2020 15:49:18 -0800	[thread overview]
Message-ID: <20200204234918.20425-18-slongerbeam@gmail.com> (raw)
In-Reply-To: <20200204234918.20425-1-slongerbeam@gmail.com>

Remove the TODO items regarding media link creation, these issues are
resolved by moving media link creation to individual entity bound
callbacks and the implementation of the get_fwnode_pad operation.

Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
---
 drivers/staging/media/imx/TODO | 29 -----------------------------
 1 file changed, 29 deletions(-)

diff --git a/drivers/staging/media/imx/TODO b/drivers/staging/media/imx/TODO
index 6f29b5ca5324..a371cdedcdb0 100644
--- a/drivers/staging/media/imx/TODO
+++ b/drivers/staging/media/imx/TODO
@@ -17,35 +17,6 @@
   decided whether this feature is useful enough to make it generally
   available by exporting to v4l2-core.
 
-- After all async subdevices have been bound, v4l2_fwnode_parse_link()
-  is used to form the media links between the devices discovered in
-  the OF graph.
-
-  While this approach allows support for arbitrary OF graphs, there
-  are some assumptions for this to work:
-
-  1. If a port owned by a device in the graph has endpoint nodes, the
-     port is treated as a media pad.
-
-     This presents problems for devices that don't make this port = pad
-     assumption. Examples are SMIAPP compatible cameras which define only
-     a single output port node, but which define multiple pads owned
-     by multiple subdevices (pixel-array, binner, scaler). Or video
-     decoders (entity function MEDIA_ENT_F_ATV_DECODER), which also define
-     only a single output port node, but define multiple pads for video,
-     VBI, and audio out.
-
-     A workaround at present is to set the port reg properties to
-     correspond to the media pad index that the port represents. A
-     possible long-term solution is to implement a subdev API that
-     maps a port id to a media pad index.
-
-  2. Every endpoint of a port owned by a device in the graph is treated
-     as a media link.
-
-     Which means a port must not contain mixed-use endpoints, they
-     must all refer to media links between V4L2 subdevices.
-
 - i.MX7: all of the above, since it uses the imx media core
 
 - i.MX7: use Frame Interval Monitor
-- 
2.17.1

