From: Marco Felsch <m.felsch@pengutronix.de> To: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Cc: mchehab@kernel.org, sakari.ailus@linux.intel.com, hans.verkuil@cisco.com, jacopo+renesas@jmondi.org, robh+dt@kernel.org, linux-media@vger.kernel.org, devicetree@vger.kernel.org, kernel@pengutronix.de, Jacopo Mondi <jacopo@jmondi.org> Subject: Re: [PATCH v6 02/13] media: v4l2-fwnode: add v4l2_fwnode_connector Date: Fri, 9 Aug 2019 09:55:36 +0200 Message-ID: <20190809075536.pukp444dmb7haoxj@pengutronix.de> (raw) In-Reply-To: <20190516163632.GO14820@pendragon.ideasonboard.com> Hi Laurent, On 19-05-16 19:36, Laurent Pinchart wrote: > Hi Marco, > > Thank you for the patch. Thanks for the review and sorry for the delayed reply. > On Mon, Apr 15, 2019 at 02:44:02PM +0200, Marco Felsch wrote: > > Currently every driver needs to parse the connector endpoints by it self. > > s/it self/itself/ > > > This is the initial work to make this generic. The generic connector has > > some common fields and some connector specific parts. The generic one > > includes: > > - type > > - label > > - remote_port (the port where the connector is connected to) > > - remote_id (the endpoint where the connector is connected to) > > This assumes a single connection between a connector and a remote port, > and a single port on the connector side. Is this guaranteed ? For the > mini-DIN-4 connectors (often used for S-Video) for instance, I recall > from the extensive discussions we had in the past that they should be > modeled with two pins, one for the Y component and one for C components. > The rationale for this is to support systems where such a connector > could be used to carry S-Video, but also two composite video signals > (usually through an external adapter from 2 RCA female connectors to one > S-Video male connector) that would be routed to two separate video > decoders (or two different inputs of the same video decoder). Other > topologies may be possible too. I got your concerns and I also remember the tvp5150 port bindings myself in the past. Do you know how often such a setup you described above happens these days? I would rather add more documentation to the bindings [1] and add a check to v4l2_fwnode_parse_connector() to guarantee that one port has only one endpoint. Because I don't think that analog connectors has a bright future these days. [1] Documentation/devicetree/bindings/display/connector/ \ analog-tv-connector.txt > > The specific fields are within a union, since only one of them can be > > available at the time. Since this is the initial support the patch adds > > only the analog-connector specific ones. > > > > Signed-off-by: Marco Felsch <m.felsch@pengutronix.de> > > Reviewed-by: Jacopo Mondi <jacopo@jmondi.org> > > --- > > [1] https://patchwork.kernel.org/cover/10794703/ > > > > v6: > > - fix some spelling and style issues > > - rm unnecessary comments > > - drop vga and dvi connector > > > > v2-v4: > > - nothing since the patch was squashed from series [1] into this > > series. > > > > include/media/v4l2-connector.h | 30 ++++++++++++++++++++++++++++++ > > include/media/v4l2-fwnode.h | 33 +++++++++++++++++++++++++++++++++ > > 2 files changed, 63 insertions(+) > > create mode 100644 include/media/v4l2-connector.h > > > > diff --git a/include/media/v4l2-connector.h b/include/media/v4l2-connector.h > > new file mode 100644 > > index 000000000000..3a951c54f50e > > --- /dev/null > > +++ b/include/media/v4l2-connector.h > > @@ -0,0 +1,30 @@ > > +/* SPDX-License-Identifier: GPL-2.0-only */ > > +/* > > + * v4l2-connector.h > > + * > > + * V4L2 connector types. > > + * > > + * Copyright 2019 Pengutronix, Marco Felsch <kernel@pengutronix.de> > > + */ > > + > > +#ifndef V4L2_CONNECTOR_H > > +#define V4L2_CONNECTOR_H > > + > > +#define V4L2_CONNECTOR_MAX_LABEL 41 > > Hans pointed out this was a weird number. Should you turn the label > field into a pointer to make this more generic (with a > v4l2_fwnode_connector_cleanup() function then) ? Yes, that would be the better approach. I will change that. Regards, Marco > > + > > +/** > > + * enum v4l2_connector_type - connector type > > + * @V4L2_CON_UNKNOWN: unknown connector type, no V4L2 connetor configuration > > + * @V4L2_CON_COMPOSITE: analog composite connector > > + * @V4L2_CON_SVIDEO: analog svideo connector > > + * @V4L2_CON_HDMI: digital hdmi connector > > + */ > > +enum v4l2_connector_type { > > + V4L2_CON_UNKNOWN, > > + V4L2_CON_COMPOSITE, > > + V4L2_CON_SVIDEO, > > + V4L2_CON_HDMI, > > +}; > > + > > +#endif /* V4L2_CONNECTOR_H */ > > + > > diff --git a/include/media/v4l2-fwnode.h b/include/media/v4l2-fwnode.h > > index 6c07825e18b9..f4df1b95c5ef 100644 > > --- a/include/media/v4l2-fwnode.h > > +++ b/include/media/v4l2-fwnode.h > > @@ -22,6 +22,7 @@ > > #include <linux/list.h> > > #include <linux/types.h> > > > > +#include <media/v4l2-connector.h> > > #include <media/v4l2-mediabus.h> > > #include <media/v4l2-subdev.h> > > > > @@ -126,6 +127,38 @@ struct v4l2_fwnode_link { > > unsigned int remote_port; > > }; > > > > +/** > > + * struct v4l2_fwnode_connector_analog - analog connector data structure > > + * @supported_tvnorms: tv norms this connector supports, set to V4L2_STD_ALL > > + * if no restrictions are specified. > > + */ > > +struct v4l2_fwnode_connector_analog { > > + v4l2_std_id supported_tvnorms; > > +}; > > + > > +/** > > + * struct v4l2_fwnode_connector - the connector data structure > > + * @remote_port: identifier of the remote endpoint port the connector connects > > + * to > > + * @remote_id: identifier of the remote endpoint the connector connects to > > + * @label: connetor label > > + * @type: connector type > > + * @connector: connector configuration > > + * @connector.analog: analog connector configuration > > + * &struct v4l2_fwnode_connector_analog > > + */ > > +struct v4l2_fwnode_connector { > > + unsigned int remote_port; > > + unsigned int remote_id; > > + char label[V4L2_CONNECTOR_MAX_LABEL]; > > + enum v4l2_connector_type type; > > + > > + union { > > + struct v4l2_fwnode_connector_analog analog; > > + /* future connectors */ > > + } connector; > > +}; > > + > > /** > > * v4l2_fwnode_endpoint_parse() - parse all fwnode node properties > > * @fwnode: pointer to the endpoint's fwnode handle > > -- > Regards, > > Laurent Pinchart > -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
next prev parent reply index Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-04-15 12:44 [PATCH v6 00/13] TVP5150 new features Marco Felsch 2019-04-15 12:44 ` [PATCH v6 01/13] dt-bindings: connector: analog: add tv norms property Marco Felsch 2019-05-06 10:01 ` Hans Verkuil 2019-05-06 10:06 ` Hans Verkuil 2019-05-14 18:11 ` Mauro Carvalho Chehab 2019-08-09 6:00 ` Marco Felsch 2019-05-16 16:27 ` Laurent Pinchart 2019-08-09 5:58 ` Marco Felsch 2019-08-15 12:33 ` Laurent Pinchart 2019-08-15 12:50 ` Marco Felsch 2019-08-15 13:02 ` Laurent Pinchart 2019-08-15 13:35 ` Marco Felsch 2019-04-15 12:44 ` [PATCH v6 02/13] media: v4l2-fwnode: add v4l2_fwnode_connector Marco Felsch 2019-05-06 9:50 ` Hans Verkuil 2019-05-14 18:17 ` Mauro Carvalho Chehab 2019-08-09 7:20 ` Marco Felsch 2019-05-16 16:36 ` Laurent Pinchart 2019-08-09 7:55 ` Marco Felsch [this message] 2019-08-15 12:38 ` Laurent Pinchart 2019-08-15 13:04 ` Marco Felsch 2019-08-15 13:10 ` Laurent Pinchart 2019-08-15 13:37 ` Marco Felsch 2019-04-15 12:44 ` [PATCH v6 03/13] media: v4l2-fwnode: add initial connector parsing support Marco Felsch 2019-05-06 10:10 ` Hans Verkuil 2019-05-14 18:20 ` Mauro Carvalho Chehab 2019-05-16 16:51 ` Laurent Pinchart 2019-08-09 12:16 ` Marco Felsch 2019-08-15 12:48 ` Laurent Pinchart 2019-08-15 13:14 ` Marco Felsch 2019-08-09 8:59 ` Marco Felsch 2019-04-15 12:44 ` [PATCH v6 04/13] partial revert of "[media] tvp5150: add HW input connectors support" Marco Felsch 2019-04-15 12:44 ` [PATCH v6 05/13] media: tvp5150: add input source selection of_graph support Marco Felsch 2019-05-06 10:09 ` Jacopo Mondi 2019-05-14 18:25 ` Mauro Carvalho Chehab 2019-05-16 18:03 ` Laurent Pinchart 2019-08-13 8:54 ` Marco Felsch 2019-08-15 12:51 ` Laurent Pinchart 2019-08-15 13:22 ` Marco Felsch 2019-08-15 13:26 ` Laurent Pinchart 2019-04-15 12:44 ` [PATCH v6 06/13] media: dt-bindings: tvp5150: Add input port connectors DT bindings Marco Felsch 2019-05-14 18:27 ` Mauro Carvalho Chehab 2019-05-16 18:05 ` Laurent Pinchart 2019-08-13 8:56 ` Marco Felsch 2019-04-15 12:44 ` [PATCH v6 07/13] media: tvp5150: add FORMAT_TRY support for get/set selection handlers Marco Felsch 2019-05-06 13:36 ` Jacopo Mondi 2019-08-09 5:33 ` Marco Felsch 2019-05-14 18:48 ` Mauro Carvalho Chehab 2019-08-09 5:34 ` Marco Felsch 2019-04-15 12:44 ` [PATCH v6 08/13] media: tvp5150: initialize subdev before parsing device tree Marco Felsch 2019-05-14 20:20 ` Mauro Carvalho Chehab 2019-08-09 5:42 ` Marco Felsch 2019-04-15 12:44 ` [PATCH v6 09/13] media: tvp5150: add s_power callback Marco Felsch 2019-05-14 20:13 ` Mauro Carvalho Chehab 2019-08-09 5:39 ` Marco Felsch 2019-04-15 12:44 ` [PATCH v6 10/13] media: dt-bindings: tvp5150: cleanup bindings stlye Marco Felsch 2019-04-15 12:44 ` [PATCH v6 11/13] media: dt-bindings: tvp5150: add optional tvnorms documentation Marco Felsch 2019-04-15 12:44 ` [PATCH v6 12/13] media: tvp5150: add support to limit tv norms on connector Marco Felsch 2019-05-16 18:07 ` Laurent Pinchart 2019-08-13 9:10 ` Marco Felsch 2019-08-15 12:53 ` Laurent Pinchart 2019-08-15 13:26 ` Marco Felsch 2019-04-15 12:44 ` [PATCH v6 13/13] media: tvp5150: make debug output more readable Marco Felsch 2019-05-06 13:39 ` Jacopo Mondi 2019-05-14 20:18 ` Mauro Carvalho Chehab 2019-08-09 5:42 ` Marco Felsch 2019-05-06 5:47 ` [PATCH v6 00/13] TVP5150 new features Marco Felsch 2019-05-14 17:18 ` Mauro Carvalho Chehab 2019-05-14 20:20 ` Mauro Carvalho Chehab 2019-05-14 20:58 ` Marco Felsch 2019-05-14 23:41 ` Mauro Carvalho Chehab
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