Re: [Freedreno] [PATCH v1 1/2] dt-bindings: display: add sc7180 panel variant

[Rob Clark]

On Thu, Nov 28, 2019 at 10:56 PM Harigovindan P <harigovi@xxxxxxxxxxxxxx> wrote:
>
> Add a compatible string to support sc7180 panel version.
>
> Signed-off-by: Harigovindan P <harigovi@xxxxxxxxxxxxxx>
> ---
>  .../bindings/display/visionox,rm69299.txt          | 68 ++++++++++++++++++++++
>  1 file changed, 68 insertions(+)
>  create mode 100755 Documentation/devicetree/bindings/display/visionox,rm69299.txt
>
> diff --git a/Documentation/devicetree/bindings/display/visionox,rm69299.txt b/Documentation/devicetree/bindings/display/visionox,rm69299.txt
> new file mode 100755
> index 0000000..4622191
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/visionox,rm69299.txt
> @@ -0,0 +1,68 @@
> +Visionox model RM69299 DSI display driver
> +
> +The Visionox RM69299 is a generic display driver, currently only configured
> +for use in the 1080p display on the Qualcomm SC7180 MTP board.
> +
> +Required properties:
> +- compatible: should be "visionox,rm69299-1080p-display"
> +- vdda-supply: phandle of the regulator that provides the supply voltage
> +  Power IC supply
> +- vdd3p3-supply: phandle of the regulator that provides the supply voltage
> +  Power IC supply
> +- reset-gpios: phandle of gpio for reset line
> +  This should be 8mA, gpio can be configured using mux, pinctrl, pinctrl-names
> +  (active low)
> +- mode-gpios: phandle of the gpio for choosing the mode of the display
> +  for single DSI
> +- ports: This device has one video port driven by one DSI. Their connections
> +  are modeled using the OF graph bindings specified in
> +  Documentation/devicetree/bindings/graph.txt.
> +  - port@0: DSI input port driven by master DSI
> +
> +Example:
> +
> +       dsi@ae94000 {
> +               panel@0 {
> +                       compatible = "visionox,rm69299-1080p-display";
> +                       reg = <0>;
> +
> +                       vdda-supply = <&src_pp1800_l8c>;
> +                       vdd3p3-supply = <&src_pp2800_l18a>;
> +
> +                       pinctrl-names = "default", "suspend";
> +                       pinctrl-0 = <&disp_pins_default>;
> +                       pinctrl-1 = <&disp_pins_default>;
> +
> +                       reset-gpios = <&pm6150l_gpios 3 0>;
> +
> +                       display-timings {
> +                               timing0: timing-0 {
> +                                       /* originally
> +                                        * 268316160 Mhz,
> +                                        * but value below fits
> +                                        * better w/ downstream
> +                                        */
> +                                       clock-frequency = <158695680>;
> +                                       hactive = <1080>;
> +                                       vactive = <2248>;
> +                                       hfront-porch = <26>;
> +                                       hback-porch = <36>;
> +                                       hsync-len = <2>;
> +                                       vfront-porch = <56>;
> +                                       vback-porch = <4>;
> +                                       vsync-len = <4>;
> +                               };

why do we specify timings in dt?  Would the panel use different
timings on a different board?

BR,
-R

> +                       };
> +
> +                       ports {
> +                               #address-cells = <1>;
> +                               #size-cells = <0>;
> +                               port@0 {
> +                                       reg = <0>;
> +                                       panel0_in: endpoint {
> +                                               remote-endpoint = <&dsi0_out>;
> +                                       };
> +                               };
> +                       };
> +               };
> +       };
> --
> 2.7.4
>
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