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media: dt-bindings: connector: analog: add sdtv standards property

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Some connectors no matter if in- or output supports only a limited
range of sdtv standards. It doesn't matter if the hardware behind that
connector supports more than the listed formats since the users are
restriced by a label e.g. to plug only a camera into this connector
which uses the PAL format.

This patch adds the capability to describe such limitation within the
firmware. There are no format restrictions if the property isn't
present, so it's completely backward compatible.

Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Marco Felsch 2020-03-12 11:31:36 +01:00 committed by Mauro Carvalho Chehab
parent 3f870a4503
commit 369cee7925
1 changed files with 6 additions and 0 deletions
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6
Documentation/devicetree/bindings/display/connector/analog-tv-connector.txt
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@ -6,16 +6,22 @@ Required properties:
Optional properties: Optional properties:
- label: a symbolic name for the connector - label: a symbolic name for the connector
- sdtv-standards: limit the supported TV standards on a connector to the given
ones. If not specified all TV standards are allowed.
Possible TV standards are defined in
include/dt-bindings/display/sdtv-standards.h.
Required nodes: Required nodes:
- Video port for TV input - Video port for TV input
Example Example
------- -------
#include <dt-bindings/display/sdtv-standards.h>
tv: connector { tv: connector {
compatible = "composite-video-connector"; compatible = "composite-video-connector";
label = "tv"; label = "tv";
sdtv-standards = <(SDTV_STD_PAL | SDTV_STD_NTSC)>;
port { port {
tv_connector_in: endpoint { tv_connector_in: endpoint {