Linux Media Controller development
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From: Steve Longerbeam <slongerbeam@gmail.com>
To: linux-media@vger.kernel.org
Cc: Sakari Ailus <sakari.ailus@linux.intel.com>,
	Mauro Carvalho Chehab <mchehab+huawei@kernel.org>,
	Hans Verkuil <hverkuil-cisco@xs4all.nl>,
	Rui Miguel Silva <rmfrfs@gmail.com>,
	Philipp Zabel <p.zabel@pengutronix.de>,
	Steve Longerbeam <slongerbeam@gmail.com>
Subject: [PATCH v4 17/17] media: imx: TODO: Remove media link creation todos
Date: Tue,  3 Mar 2020 15:42:56 -0800	[thread overview]
Message-ID: <20200303234256.8928-18-slongerbeam@gmail.com> (raw)
In-Reply-To: <20200303234256.8928-1-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


  parent reply	other threads:[~2020-03-03 23:43 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-03 23:42 [PATCH v4 00/17] media: imx: Create media links in bound notifiers Steve Longerbeam
2020-03-03 23:42 ` [PATCH v4 01/17] media: entity: Pass entity to get_fwnode_pad operation Steve Longerbeam
2020-04-14 22:58   ` Laurent Pinchart
2020-03-03 23:42 ` [PATCH v4 02/17] media: video-mux: Parse information from firmware without using callbacks Steve Longerbeam
2020-03-03 23:42 ` [PATCH v4 03/17] media: imx: " Steve Longerbeam
2020-03-03 23:42 ` [PATCH v4 04/17] Revert "media: v4l2-fwnode: Add a convenience function for registering subdevs with notifiers" Steve Longerbeam
2020-03-03 23:42 ` [PATCH v4 05/17] media: imx: csi: Implement get_fwnode_pad op Steve Longerbeam
2020-04-14 23:02   ` Laurent Pinchart
2020-03-03 23:42 ` [PATCH v4 06/17] media: imx: mipi csi-2: " Steve Longerbeam
2020-04-14 23:07   ` Laurent Pinchart
2020-04-14 23:20     ` Sakari Ailus
2020-04-14 23:27       ` Laurent Pinchart
2020-04-14 23:56         ` Sakari Ailus
2020-04-14 23:50       ` Steve Longerbeam
2020-04-15  0:43         ` Laurent Pinchart
2020-04-14 23:29     ` Steve Longerbeam
2020-03-03 23:42 ` [PATCH v4 07/17] media: video-mux: " Steve Longerbeam
2020-04-14 23:08   ` Laurent Pinchart
2020-04-15  0:17     ` Steve Longerbeam
2020-03-03 23:42 ` [PATCH v4 08/17] media: imx: Add imx_media_create_fwnode_pad_link() Steve Longerbeam
2020-04-14 23:21   ` Laurent Pinchart
2020-03-03 23:42 ` [PATCH v4 09/17] media: video-mux: Create media links in bound notifier Steve Longerbeam
2020-04-14 23:16   ` Laurent Pinchart
2020-04-14 23:47     ` Steve Longerbeam
2020-04-18  0:56       ` Steve Longerbeam
2020-03-03 23:42 ` [PATCH v4 10/17] media: imx: mipi csi-2: " Steve Longerbeam
2020-03-03 23:42 ` [PATCH v4 11/17] media: imx7: mipi csis: " Steve Longerbeam
2020-03-03 23:42 ` [PATCH v4 12/17] media: imx7: csi: " Steve Longerbeam
2020-03-03 23:42 ` [PATCH v4 13/17] media: imx: " Steve Longerbeam
2020-03-03 23:42 ` [PATCH v4 14/17] media: imx: csi: Lookup upstream endpoint with imx_media_get_pad_fwnode Steve Longerbeam
2020-04-14 23:24   ` Laurent Pinchart
2020-03-03 23:42 ` [PATCH v4 15/17] media: imx: Create missing links from CSI-2 receiver Steve Longerbeam
2020-04-14 23:32   ` Laurent Pinchart
2020-04-15  0:10     ` Steve Longerbeam
2020-03-03 23:42 ` [PATCH v4 16/17] media: imx: silence a couple debug messages Steve Longerbeam
2020-04-14 23:33   ` Laurent Pinchart
2020-03-03 23:42 ` Steve Longerbeam [this message]
2020-03-25 18:09 ` [PATCH v4 00/17] media: imx: Create media links in bound notifiers Steve Longerbeam

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