On Fri, Jun 10, 2022 at 2:55 PM Sam Ravnborg <sam@xxxxxxxxxxxx> wrote:
>
> Hi Rob,
>
> On Fri, Jun 10, 2022 at 02:38:18PM -0600, Rob Herring wrote:
> > 'arm,rtsm-display' is a panel for Arm, Ltd. virtual platforms (e.g. FVP).
> > The binding has been in use for a long time, but was never documented.
> >
> > Some users and an example have a 'panel-dpi' compatible, but that's not
> > needed without a 'panel-timing' node which none of the users have since
> > commit 928faf5e3e8d ("arm64: dts: fvp: Remove panel timings"). The
> > example does have a 'panel-timing' node, but it should not for the
> > same reasons the node was removed in the dts files. So update the
> > example in arm,pl11x.yaml to match the schema.
> >
> > Cc: Linus Walleij <linus.walleij@xxxxxxxxxx>
> > Cc: Robin Murphy <robin.murphy@xxxxxxx>
> > Cc: Andre Przywara <andre.przywara@xxxxxxx>
> > Signed-off-by: Rob Herring <robh@xxxxxxxxxx>
> > ---
> > .../bindings/display/arm,pl11x.yaml | 15 +-------------
> > .../bindings/display/panel/panel-simple.yaml | 20 +++++++++++++------
> > 2 files changed, 15 insertions(+), 20 deletions(-)
> >
> > diff --git a/Documentation/devicetree/bindings/display/arm,pl11x.yaml b/Documentation/devicetree/bindings/display/arm,pl11x.yaml
> > index b545c6d20325..6cc9045e5c68 100644
> > --- a/Documentation/devicetree/bindings/display/arm,pl11x.yaml
> > +++ b/Documentation/devicetree/bindings/display/arm,pl11x.yaml
> > @@ -159,25 +159,12 @@ examples:
> > };
> >
> > panel {
> > - compatible = "arm,rtsm-display", "panel-dpi";
> > - power-supply = <&vcc_supply>;
> > + compatible = "arm,rtsm-display";
> >
> > port {
> > clcd_panel: endpoint {
> > remote-endpoint = <&clcd_pads>;
> > };
> > };
> > -
> > - panel-timing {
> > - clock-frequency = <25175000>;
> > - hactive = <640>;
> > - hback-porch = <40>;
> > - hfront-porch = <24>;
> > - hsync-len = <96>;
> > - vactive = <480>;
> > - vback-porch = <32>;
> > - vfront-porch = <11>;
> > - vsync-len = <2>;
> > - };
> > };
> > ...
> > diff --git a/Documentation/devicetree/bindings/display/panel/panel-simple.yaml b/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
> > index 21ba90c9fe33..97afd276c54a 100644
> > --- a/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
> > +++ b/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
> > @@ -19,9 +19,6 @@ description: |
> >
> > If the panel is more advanced a dedicated binding file is required.
> >
> > -allOf:
> > - - $ref: panel-common.yaml#
> > -
> > properties:
> >
> > compatible:
> > @@ -35,6 +32,8 @@ properties:
> > - ampire,am-480272h3tmqw-t01h
> > # Ampire AM-800480R3TMQW-A1H 7.0" WVGA TFT LCD panel
> > - ampire,am800480r3tmqwa1h
> > + # Arm, Ltd. Virtual Platforms Display
> > + - arm,rtsm-display
> > # AU Optronics Corporation 10.1" WSVGA TFT LCD panel
> > - auo,b101aw03
> > # AU Optronics Corporation 10.1" WSVGA TFT LCD panel
> > @@ -340,9 +339,18 @@ properties:
> >
> > additionalProperties: false
> >
> > -required:
> > - - compatible
> > - - power-supply
> > +allOf:
> > + - $ref: panel-common.yaml#
> > + - if:
> > + # Most 'simple' panels must have a single supply, but a virtual display does not
> > + not:
> > + properties:
> > + compatible:
> > + contains:
> > + const: arm,rtsm-display
> > + then:
> > + required:
> > + - power-supply
>
> Sorry, but I do not like this change. The beauty of panel-simple is that
> this is a collection of simple display with identical bindings because
> the HW is more or less the same (in general - not in details like size
> etc).
>
> Any panels that requires more are pushed out to their own binding and
> for arm,rtsm-display that would be better.
But I require less...
> It is not this single exceptions that bothers me, it is the many
> exceptions we will have in a few years from now.
Fair enough, I'll make it a separate file.
Rob
