Re: [PATCH 4/9] dt-bindings: Add ANX6345 DP/eDP transmitter binding

Icenowy Zheng
2018-10-18T10:00:05Z

在 2018-10-18四的 11:53 +0300，Laurent Pinchart写道：
> Hi Icenowy,
>
> Thank you for the patch.
>
> On Thursday, 18 October 2018 10:33:22 EEST Icenowy Zheng wrote:
> > The ANX6345 is an ultra-low power DisplayPort/eDP transmitter
> > designed
> > for portable devices.
> >
> > Add a binding document for it.
> >
> > Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
> > ---
> > .../bindings/display/bridge/anx6345.txt | 39
> > +++++++++++++++++++
> > 1 file changed, 39 insertions(+)
> > create mode 100644
> > Documentation/devicetree/bindings/display/bridge/anx6345.txt
> >
> > diff --git
> > a/Documentation/devicetree/bindings/display/bridge/anx6345.txt
> > b/Documentation/devicetree/bindings/display/bridge/anx6345.txt new
> > file
> > mode 100644
> > index 000000000000..0689d4eb5f65
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/display/bridge/anx6345.txt
> > @@ -0,0 +1,39 @@
> > +Analogix ANX6345 eDP Transmitter
> > +--------------------------------
> > +
> > +The ANX6345 is an ultra-low power Full-HD eDP transmitter designed
> > for
> > +portable devices.
> > +
> > +Required properties:
> > +
> > + - compatible : "analogix,anx6345"
> > + - reg : I2C address of the device
> > + - reset-gpios : Which GPIO to use for reset
> > +
> > +Optional properties:
> > +
> > + - dvdd12-supply : Regulator for 1.2V digital core power.
> > + - dvdd25-supply : Regulator for 2.5V digital core power.
>
> Shouldn't these to supplies be mandatory ?

Yes they should.

>
> > + - panel-supply : Regulator for the power of the panel.
>
> Shouldn't the panel supply for specified in the DT node of the panel
> ?

However, eDP panel can be probed, may vary on the same device, and we
don't have a generic binding for it...

>
> > + - edid : verbatim EDID data block describing
> > attached
> > + panel, only used when the panel has no EDID
> > info.
>
> This should also be specified in the panel DT node.
>
> > + - Video port for RGB input, using the DT bindings defined in [1].
>
> I think you should also add a port for the output.

What will it point to?

>
> > +[1]: Documentation/devicetree/bindings/media/video-interfaces.txt
> > +
> > +Example:
> > +
> > +anx6345: anx6345@38 {
> > + compatible = "analogix,anx6345";
> > + reg = <0x38>;
> > + reset-gpios = <&pio 3 24 GPIO_ACTIVE_HIGH>; /* PD24 */
> > + panel-supply = <&reg_dc1sw>;
> > + dvdd25-supply = <&reg_dldo2>;
> > + dvdd12-supply = <&reg_fldo1>;
> > +
> > + port {
> > + anx6345_in: endpoint {
> > + remote-endpoint = <&tcon0_out_anx6345>;
> > + };
> > + };
> > +};
>
>