linux-kernel - Re: [PATCH 2/4] dt-bindings: display: panel: Add Himax HX83112B

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Message-ID: <8b67cea3-82f7-47f8-b026-fd26cfbf94b4@lucaweiss.eu>
Date: Mon, 24 Feb 2025 21:40:23 +0100
From: Luca Weiss <luca@...aweiss.eu>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc: ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org,
 Neil Armstrong <neil.armstrong@...aro.org>,
 Jessica Zhang <quic_jesszhan@...cinc.com>,
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Bjorn Andersson <andersson@...nel.org>,
 Konrad Dybcio <konradybcio@...nel.org>, dri-devel@...ts.freedesktop.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH 2/4] dt-bindings: display: panel: Add Himax HX83112B

On 23-02-2025 7:25 p.m., Dmitry Baryshkov wrote:
> On Sat, Feb 22, 2025 at 06:58:05PM +0100, Luca Weiss wrote:
>> Himax HX83112B is a display driver IC used to drive LCD DSI panels.
>> Describe it and the Fairphone 3 panel from DJN using it.
>>
>> Signed-off-by: Luca Weiss <luca@...aweiss.eu>
>> ---
>>   .../bindings/display/panel/himax,hx83112b.yaml     | 75 ++++++++++++++++++++++
>>   1 file changed, 75 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/display/panel/himax,hx83112b.yaml b/Documentation/devicetree/bindings/display/panel/himax,hx83112b.yaml
>> new file mode 100644
>> index 0000000000000000000000000000000000000000..e6bd4b33d40be98e479d84617aea6d2af0df70e4
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/display/panel/himax,hx83112b.yaml
>> @@ -0,0 +1,75 @@
>> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/display/panel/himax,hx83112b.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Himax HX83112B-based DSI display panels
>> +
>> +maintainers:
>> +  - Luca Weiss <luca@...aweiss.eu>
>> +
>> +description:
>> +  The Himax HX83112B is a generic DSI Panel IC used to control
>> +  LCD panels.
>> +
>> +allOf:
>> +  - $ref: panel-common.yaml#
>> +
>> +properties:
>> +  compatible:
>> +    contains:
>> +      const: djn,fairphone-fp3-panel
> 
> Would you know a better name or ID for a panel?

Initially no, as mentioned on the cover letter.

But I dug a bit more in some other documents and found this number now: 
"98-03057-6598B-I"

This also somewhat matches the format of the Fairphone 4 panel from DJN: 
("djn,9a-3r063-1102b").

So I'll change the compatible to "djn,98-03057-6598b-i" in the next 
revision.

Regards
Luca

> 
>> +
>> +  reg:
>> +    maxItems: 1
>> +
>> +  iovcc-supply:
>> +    description: I/O voltage rail
>> +
>> +  vsn-supply:
>> +    description: Positive source voltage rail
>> +
>> +  vsp-supply:
>> +    description: Negative source voltage rail
>> +
>> +  port: true
>> +
>> +required:
>> +  - compatible
>> +  - reg
>> +  - reset-gpios
>> +  - iovcc-supply
>> +  - vsn-supply
>> +  - vsp-supply
>> +  - port
>> +
>> +unevaluatedProperties: false
>> +
>> +examples:
>> +  - |
>> +    #include <dt-bindings/gpio/gpio.h>
>> +
>> +    dsi {
>> +        #address-cells = <1>;
>> +        #size-cells = <0>;
>> +
>> +        panel@0 {
>> +            compatible = "djn,fairphone-fp3-panel";
>> +            reg = <0>;
>> +
>> +            reset-gpios = <&tlmm 61 GPIO_ACTIVE_LOW>;
>> +
>> +            iovcc-supply = <&pm8953_l6>;
>> +            vsn-supply = <&pmi632_lcdb_ncp>;
>> +            vsp-supply = <&pmi632_lcdb_ldo>;
>> +
>> +            port {
>> +                panel_in_0: endpoint {
>> +                    remote-endpoint = <&dsi0_out>;
>> +                };
>> +            };
>> +        };
>> +    };
>> +
>> +...
>>
>> -- 
>> 2.48.1
>>
>