linux-kernel - Re: [PATCH v5 3/4] ARM: dts: da850-lcdk: add the vga-bridge node

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Date:   Wed, 7 Dec 2016 15:30:46 +0100
From:   Bartosz Golaszewski <bgolaszewski@...libre.com>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:     Jyri Sarha <jsarha@...com>, Tomi Valkeinen <tomi.valkeinen@...com>,
        David Airlie <airlied@...ux.ie>,
        Kevin Hilman <khilman@...libre.com>,
        Michael Turquette <mturquette@...libre.com>,
        Sekhar Nori <nsekhar@...com>, Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Mark Rutland <mark.rutland@....com>,
        Peter Ujfalusi <peter.ujfalusi@...com>,
        Russell King <linux@...linux.org.uk>,
        LKML <linux-kernel@...r.kernel.org>,
        arm-soc <linux-arm-kernel@...ts.infradead.org>,
        linux-drm <dri-devel@...ts.freedesktop.org>,
        linux-devicetree <devicetree@...r.kernel.org>
Subject: Re: [PATCH v5 3/4] ARM: dts: da850-lcdk: add the vga-bridge node

2016-12-07 15:25 GMT+01:00 Laurent Pinchart <laurent.pinchart@...asonboard.com>:
> Hi Bartosz,
>
> Thank you for the patch.
>
> On Wednesday 07 Dec 2016 11:42:44 Bartosz Golaszewski wrote:
>> Add the vga-bridge node to the board DT together with corresponding
>> ports and vga connector. This allows to retrieve the edid info from
>> the display automatically.
>>
>> Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
>> ---
>>  arch/arm/boot/dts/da850-lcdk.dts | 67 ++++++++++++++++++++++++++++++++++++
>>  1 file changed, 67 insertions(+)
>>
>> diff --git a/arch/arm/boot/dts/da850-lcdk.dts
>> b/arch/arm/boot/dts/da850-lcdk.dts index afcb482..39602eb 100644
>> --- a/arch/arm/boot/dts/da850-lcdk.dts
>> +++ b/arch/arm/boot/dts/da850-lcdk.dts
>> @@ -51,6 +51,51 @@
>>                       system-clock-frequency = <24576000>;
>>               };
>>       };
>> +
>> +     vga-bridge {
>> +             compatible = "ti,ths8135";
>> +             #address-cells = <1>;
>> +             #size-cells = <0>;
>> +
>> +             ports {
>> +                     #address-cells = <1>;
>> +                     #size-cells = <0>;
>> +
>> +                     port@0 {
>> +                             #address-cells = <1>;
>> +                             #size-cells = <0>;
>> +                             reg = <0>;
>> +
>> +                             vga_bridge_in: endpoint@0 {
>> +                                     reg = <0>;
>> +                                     remote-endpoint = <&lcdc_out_vga>;
>> +                             };
>> +                     };
>> +
>> +                     port@1 {
>> +                             #address-cells = <1>;
>> +                             #size-cells = <0>;
>> +                             reg = <1>;
>> +
>> +                             vga_bridge_out: endpoint@0 {
>> +                                     reg = <0>;
>> +                                     remote-endpoint = <&vga_con_in>;
>> +                             };
>> +                     };
>> +             };
>> +     };
>> +
>> +     vga {
>> +             compatible = "vga-connector";
>> +
>> +             ddc-i2c-bus = <&i2c0>;
>> +
>> +             port {
>> +                     vga_con_in: endpoint {
>> +                             remote-endpoint = <&vga_bridge_out>;
>> +                     };
>> +             };
>> +     };
>>  };
>>
>>  &pmx_core {
>> @@ -236,3 +281,25 @@
>>  &memctrl {
>>       status = "okay";
>>  };
>> +
>> +&lcdc {
>> +     status = "okay";
>> +     pinctrl-names = "default";
>> +     pinctrl-0 = <&lcd_pins>;
>> +
>> +     ports {
>> +             #address-cells = <1>;
>> +             #size-cells = <0>;
>> +
>> +             lcdc_out: port@1 {
>> +                     #address-cells = <1>;
>> +                     #size-cells = <0>;
>> +                     reg = <1>;
>> +
>> +                     lcdc_out_vga: endpoint@0 {
>> +                             reg = <0>;
>> +                             remote-endpoint = <&vga_bridge_in>;
>> +                     };
>> +             };
>
> Just to make sure you're aware, when there's a single endpoint you can
> simplify the DT by omitting the endpoint number. This would become
>
>                 lcdc_out: port@1 {
>                         reg = <1>;
>
>                         lcdc_out_vga: endpoint {
>                                 remote-endpoint = <&vga_bridge_in>;
>                         };
>                 };
>
> It's entirely up to you, both get my
>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
>
>> +     };
>> +};
>
> --
> Regards,
>
> Laurent Pinchart
>

Hi Laurent,

thanks for the hint, I'll change it if there's going to be a new
version of the series.

Best regards,
Bartosz Golaszewski