Hi Rob
Thanks for the feedback.
On Wed, Jun 1, 2022 at 10:17 PM Rob Herring <robh@xxxxxxxxxx> wrote:
>
> On Wed, May 18, 2022 at 01:55:38PM +0200, Max Krummenacher wrote:
> > From: Max Krummenacher <max.krummenacher@xxxxxxxxxxx>
> >
> > The property is used to set the enum bus_format and infer the bpc
> > for a panel defined by 'panel-dpi'.
> > This specifies how the panel is connected to the display interface.
> >
> > Signed-off-by: Max Krummenacher <max.krummenacher@xxxxxxxxxxx>
> >
> > ---
> >
> > Changes in v2:
> > - Fix errors found by dt_binding_check
> >
> > .../bindings/display/panel/panel-dpi.yaml | 11 +++++++++
> > .../dt-bindings/display/dt-media-bus-format.h | 23 +++++++++++++++++++
> > 2 files changed, 34 insertions(+)
> > create mode 100644 include/dt-bindings/display/dt-media-bus-format.h
> >
> > diff --git a/Documentation/devicetree/bindings/display/panel/panel-dpi.yaml b/Documentation/devicetree/bindings/display/panel/panel-dpi.yaml
> > index dae0676b5c6e..a20b5898941e 100644
> > --- a/Documentation/devicetree/bindings/display/panel/panel-dpi.yaml
> > +++ b/Documentation/devicetree/bindings/display/panel/panel-dpi.yaml
> > @@ -21,6 +21,14 @@ properties:
> > - {}
> > - const: panel-dpi
> >
> > + bus-format:
> > + $ref: /schemas/types.yaml#/definitions/uint32
>
> Constraints?
Will limit the range to the one used for RGB formats in v3.
>
> > + description: |
> > + Describes how the display panel is connected to the display interface.
> > + Valid values are defined in <dt-bindings/display/dt-media-bus-format.h>.
> > + The mapping between the color/significance of the panel lines to the
> > + parallel data lines are defined in [1].
>
> Just drop the [1] and use a colon.
Done in v3.
>
> > + [1] https://www.kernel.org/doc/html/v5.17/userspace-api/media/v4l/subdev-formats.html#packed-rgb-formats
>
> Why not just use the V4L number space rather than invent yet another
> number space?
That was a proposal from here:
https://lore.kernel.org/all/20220323155817.xcsqxothziot7ba3@houat/
But probably it makes more sense to use the number space as is, changed in v3.
>
> Need a blank line here too.
>
> > backlight: true
> > enable-gpios: true
> > height-mm: true
> > @@ -39,11 +47,14 @@ additionalProperties: false
> >
> > examples:
> > - |
> > + #include <dt-bindings/display/dt-media-bus-format.h>
> > +
> > panel {
> > compatible = "startek,startek-kd050c", "panel-dpi";
> > label = "osddisplay";
> > power-supply = <&vcc_supply>;
> > backlight = <&backlight>;
> > + bus-format = <DT_MEDIA_BUS_FMT_RGB888_1X24>;
>
> Other properties describing the interface have been put in the endpoint
> node. This should too I think.
That makes a lot of sense. Changed to be part of the endpoint node in v3.
Cheers
Max
>
> >
> > port {
> > lcd_in: endpoint {
> > diff --git a/include/dt-bindings/display/dt-media-bus-format.h b/include/dt-bindings/display/dt-media-bus-format.h
> > new file mode 100644
> > index 000000000000..c0f2a7b59aa1
> > --- /dev/null
> > +++ b/include/dt-bindings/display/dt-media-bus-format.h
> > @@ -0,0 +1,23 @@
> > +/* SPDX-License-Identifier: GPL-2.0-only OR MIT */
> > +/*
> > + * Copyright 2022 Max Krummenacher <max.krummenacher@xxxxxxxxxxx>
> > + */
> > +
> > +#ifndef __DT_BINDINGS_DT_MEDIA_BUS_FORMAT_H
> > +#define __DT_BINDINGS_DT_MEDIA_BUS_FORMAT_H
> > +
> > +/*
> > + * Attention: Keep these macro names in sync with
> > + * include/uapi/linux/media-bus-format.h
> > + */
> > +
> > +#define DT_MEDIA_BUS_FMT_RGB565_1X16 1
> > +#define DT_MEDIA_BUS_FMT_RGB666_1X18 2
> > +#define DT_MEDIA_BUS_FMT_RBG888_1X24 3
> > +#define DT_MEDIA_BUS_FMT_RGB666_1X24_CPADHI 4
> > +#define DT_MEDIA_BUS_FMT_BGR888_1X24 5
> > +#define DT_MEDIA_BUS_FMT_GBR888_1X24 6
> > +#define DT_MEDIA_BUS_FMT_RGB888_1X24 7
> > +#define DT_MEDIA_BUS_FMT_RGB888_1X32_PADHI 8
> > +
> > +#endif /* __DT_BINDINGS_DT_MEDIA_BUS_FORMAT_H */
> > --
> > 2.20.1
> >
> >
