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

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Message-ID: <89cbb27e-414a-472f-8664-db5b4d37ddc1@lucaweiss.eu>
Date: Sun, 23 Feb 2025 16:29:16 +0100
From: Luca Weiss <luca@...aweiss.eu>
To: Krzysztof Kozlowski <krzk@...nel.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

Hi Krzysztof,

On 23-02-2025 12:54 p.m., Krzysztof Kozlowski 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
> 
> Why no himax,hx83112b fallback?

While this is the driver IC for this panel, I don't think there's any 
"generic" init sequence that can successfully configure this panel, so 
generic hx83112b driver could work I'd say.

Regards
Luca

> 
> Best regards,
> Krzysztof
>