[PATCH v2] dt-bindings: display: Convert a bunch of panels to DT schema

[Rob Herring]

On Sat, Jan 18, 2020 at 3:11 AM Sam Ravnborg <sam at ravnborg.org> wrote:
>
> Hi Rob.
>
> On Fri, Jan 17, 2020 at 05:17:56PM -0600, Rob Herring wrote:
> > Convert all the 'simple' panels which match the constraints of the
> > common panel-simple.yaml schema. This conversion is based on how the
> > panels are documented. Some may turn out to be more complex once the
> > schema is applied to actual dts files.
>
> Thanks for updating this patch - and very good to reduce the number of
> files with almost the same content.
>
> One comment below, with that addressed:
> Reviewed-by: Sam Ravnborg <sam at ravnborg.org>
>
> There are likely some dt files that assume panels need no power and need a
> fixed-regulator or something as power-supply now is mandatory.
> Should this be checked before we apply this patch?

Indeed there are, but we're not enforcing that schemas don't cause warnings yet.

> As we continue to see new panels more or less every week I would like
> this patch applied to drm-misc-next as soon as possible to avoid any
> future conflicts.
>
> > index 513f03466aba..000000000000
> > --- a/Documentation/devicetree/bindings/display/panel/innolux,p120zdg-bf1.txt
> > +++ /dev/null
> > @@ -1,22 +0,0 @@
> > -Innolux P120ZDG-BF1 12.02 inch eDP 2K display panel
> > -
> > -This binding is compatible with the simple-panel binding, which is specified
> > -in simple-panel.txt in this directory.
> > -
> > -Required properties:
> > -- compatible: should be "innolux,p120zdg-bf1"
> > -- power-supply: regulator to provide the supply voltage
> > -
> > -Optional properties:
> > -- enable-gpios: GPIO pin to enable or disable the panel
> > -- backlight: phandle of the backlight device attached to the panel
> > -- no-hpd: If HPD isn't hooked up; add this property.
>
> panel-simple.yaml does not include the no-hpd property.
> We only have 2 bindings, this and sharp,ld-d5116z01b.yaml
> that include the no-hpd property.
>
> We have two options:
> 1) add the no-hpd property to panel-simple.yaml
> 2) keep an independent binding for panels using no-hpd
>
> I suggest to keep an independent binding for innolux,p120zdg-bf1
> so we keep panel-simple.yaml slim.
> In other words do not delete this file and remove the compatible from
> panel-simple.yaml

Agreed. 'no-hpd' really only makes sense on eDP panels which have an a
somewhat standard connector.

Rob