Hi Marco, On Fri, Aug 09, 2019 at 07:58:09AM +0200, Marco Felsch wrote: > On 19-05-16 19:27, Laurent Pinchart wrote: > > 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. Then it should be a DT property of the hardware behind that connector (or information hardcoded directly into that driver), shouldn't it ? > > > Signed-off-by: Marco Felsch <m.felsch@xxxxxxxxxxxxxx> > > > Reviewed-by: Rob Herring <robh@xxxxxxxxxx> > > > --- > > > [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@xxxxxxxxxxxxxx> > > > + */ > > > + > > > +#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
