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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,
	Rob Herring <robh@kernel.org>
Subject: Re: [PATCH v6 01/13] dt-bindings: connector: analog: add tv norms property
Date: Fri, 9 Aug 2019 07:58:09 +0200
Message-ID: <20190809055809.fm47nllixxfievre@pengutronix.de> (raw)
In-Reply-To: <20190516162755.GN14820@pendragon.ideasonboard.com>

Hi Laurent,

On 19-05-16 19:27, Laurent Pinchart wrote:
> Hi Marco,
> 
> Thank you for the patch.
> 
> On Mon, Apr 15, 2019 at 02:44:01PM +0200, Marco Felsch wrote:
> > Some connectors no matter if in- or output supports only a limited
> > range of tv norms. 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.
> 
> Why is this needed ? It's not really a hardware property, is it ? What's
> the use case ?

Cause some hardware only support a limited range of formats to that
connector. Of course it is a hardware property. For example if a
customer wants to limit a connector to a specifc norm because the
hardware behind that connector only supports that format or is
restricted to that format.

Regards,
  Marco

> 
> > Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
> > Reviewed-by: Rob Herring <robh@kernel.org>
> > ---
> > [1] https://patchwork.kernel.org/cover/10794703/
> > 
> > v6:
> > - tvnorms.h: use tabs instead of spaces
> > - tvnorms.h: add TVNORM_PAL and TVNORM_SECAM
> > - tvnorms.h: drop rarely used TVNORM_ATSC_* norms
> > 
> > v2-v4:
> > - nothing since the patch was squashed from series [1] into this
> >   series.
> > 
> >  .../display/connector/analog-tv-connector.txt |  4 ++
> >  include/dt-bindings/media/tvnorms.h           | 56 +++++++++++++++++++
> >  2 files changed, 60 insertions(+)
> >  create mode 100644 include/dt-bindings/media/tvnorms.h
> > 
> > diff --git a/Documentation/devicetree/bindings/display/connector/analog-tv-connector.txt b/Documentation/devicetree/bindings/display/connector/analog-tv-connector.txt
> > index 0c0970c210ab..346f8937a0b7 100644
> > --- a/Documentation/devicetree/bindings/display/connector/analog-tv-connector.txt
> > +++ b/Documentation/devicetree/bindings/display/connector/analog-tv-connector.txt
> > @@ -6,6 +6,9 @@ Required properties:
> >  
> >  Optional properties:
> >  - label: a symbolic name for the connector
> > +- tvnorms: limit the supported tv norms on a connector to the given ones else
> > +           all tv norms are allowed. Possible video standards are defined in
> > +           include/dt-bindings/media/tvnorms.h.
> >  
> >  Required nodes:
> >  - Video port for TV input
> > @@ -16,6 +19,7 @@ Example
> >  tv: connector {
> >  	compatible = "composite-video-connector";
> >  	label = "tv";
> > +	tvnorms = <(TVNORM_PAL_M | TVNORM_NTSC_M)>;
> >  
> >  	port {
> >  		tv_connector_in: endpoint {
> > diff --git a/include/dt-bindings/media/tvnorms.h b/include/dt-bindings/media/tvnorms.h
> > new file mode 100644
> > index 000000000000..058ab8414145
> > --- /dev/null
> > +++ b/include/dt-bindings/media/tvnorms.h
> > @@ -0,0 +1,56 @@
> > +/* SPDX-License-Identifier: GPL-2.0-only or X11 */
> > +/*
> > + * Copyright 2019 Pengutronix, Marco Felsch <kernel@pengutronix.de>
> > + */
> > +
> > +#ifndef _DT_BINDINGS_MEDIA_TVNORMS_H
> > +#define _DT_BINDINGS_MEDIA_TVNORMS_H
> > +
> > +/* one bit for each */
> > +#define TVNORM_PAL_B		0x00000001
> > +#define TVNORM_PAL_B1		0x00000002
> > +#define TVNORM_PAL_G		0x00000004
> > +#define TVNORM_PAL_H		0x00000008
> > +#define TVNORM_PAL_I		0x00000010
> > +#define TVNORM_PAL_D		0x00000020
> > +#define TVNORM_PAL_D1		0x00000040
> > +#define TVNORM_PAL_K		0x00000080
> > +
> > +#define TVNORM_PAL		(TVNORM_PAL_B  | \
> > +				 TVNORM_PAL_B1 | \
> > +				 TVNORM_PAL_G  | \
> > +				 TVNORM_PAL_H  | \
> > +				 TVNORM_PAL_I  | \
> > +				 TVNORM_PAL_D  | \
> > +				 TVNORM_PAL_D1 | \
> > +				 TVNORM_PAL_K)
> > +
> > +#define TVNORM_PAL_M		0x00000100
> > +#define TVNORM_PAL_N		0x00000200
> > +#define TVNORM_PAL_Nc		0x00000400
> > +#define TVNORM_PAL_60		0x00000800
> > +
> > +#define TVNORM_NTSC_M		0x00001000	/* BTSC */
> > +#define TVNORM_NTSC_M_JP	0x00002000	/* EIA-J */
> > +#define TVNORM_NTSC_443		0x00004000
> > +#define TVNORM_NTSC_M_KR	0x00008000	/* FM A2 */
> > +
> > +#define TVNORM_SECAM_B		0x00010000
> > +#define TVNORM_SECAM_D		0x00020000
> > +#define TVNORM_SECAM_G		0x00040000
> > +#define TVNORM_SECAM_H		0x00080000
> > +#define TVNORM_SECAM_K		0x00100000
> > +#define TVNORM_SECAM_K1		0x00200000
> > +#define TVNORM_SECAM_L		0x00400000
> > +#define TVNORM_SECAM_LC		0x00800000
> > +
> > +#define TVNORM_SECAM		(TVNORM_SECAM_B  | \
> > +				 TVNORM_SECAM_D  | \
> > +				 TVNORM_SECAM_G  | \
> > +				 TVNORM_SECAM_H  | \
> > +				 TVNORM_SECAM_K  | \
> > +				 TVNORM_SECAM_K1 | \
> > +				 TVNORM_SECAM_L  | \
> > +				 TVNORM_SECAM_LC)
> > +
> > +#endif /* _DT_BINDINGS_MEDIA_TVNORMS_H */
> 
> -- 
> 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 |

  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 [this message]
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
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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