linux-kernel - Re: [RFC PATCH 2/8] dt-bindings: display: add versilicon,dc

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Message-Id: <175519927193.3738618.6789267440737807645.robh@kernel.org>
Date: Thu, 14 Aug 2025 14:21:12 -0500
From: "Rob Herring (Arm)" <robh@...nel.org>
To: Icenowy Zheng <uwu@...nowy.me>
Cc: Guo Ren <guoren@...nel.org>, David Airlie <airlied@...il.com>, 
 Jernej Skrabec <jernej.skrabec@...il.com>, devicetree@...r.kernel.org, 
 Philipp Zabel <p.zabel@...gutronix.de>, 
 Thomas Zimmermann <tzimmermann@...e.de>, 
 Laurent Pinchart <Laurent.pinchart@...asonboard.com>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Fu Wei <wefu@...hat.com>, 
 Andrzej Hajda <andrzej.hajda@...el.com>, Yao Zi <ziyao@...root.org>, 
 Maxime Ripard <mripard@...nel.org>, Han Gao <rabenda.cn@...il.com>, 
 Neil Armstrong <neil.armstrong@...aro.org>, linux-kernel@...r.kernel.org, 
 Conor Dooley <conor+dt@...nel.org>, Jonas Karlman <jonas@...boo.se>, 
 Michal Wilczynski <m.wilczynski@...sung.com>, 
 linux-riscv@...ts.infradead.org, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Drew Fustini <fustini@...nel.org>, Heiko Stuebner <heiko@...ech.de>, 
 dri-devel@...ts.freedesktop.org, Simona Vetter <simona@...ll.ch>, 
 Robert Foss <rfoss@...nel.org>
Subject: Re: [RFC PATCH 2/8] dt-bindings: display: add versilicon,dc

On Fri, 15 Aug 2025 00:40:42 +0800, Icenowy Zheng wrote:
> Verisilicon has a series of display controllers prefixed with DC and
> with self-identification facility like their GC series GPUs.
> 
> Add a device tree binding for it.
> 
> Depends on the specific DC model, it can have either one or two display
> outputs, and each display output could be set to DPI signal or "DP"
> signal (which seems to be some plain parallel bus to HDMI controllers).
> 
> Signed-off-by: Icenowy Zheng <uwu@...nowy.me>
> ---
>  .../bindings/display/verisilicon,dc.yaml      | 127 ++++++++++++++++++
>  1 file changed, 127 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/verisilicon,dc.yaml
> 

My bot found errors running 'make dt_binding_check' on your patch:

yamllint warnings/errors:

dtschema/dtc warnings/errors:
Lexical error: Documentation/devicetree/bindings/display/verisilicon,dc.example.dts:41.28-52 Unexpected 'TH1520_RESET_ID_DPU_CORE'
Lexical error: Documentation/devicetree/bindings/display/verisilicon,dc.example.dts:42.22-45 Unexpected 'TH1520_RESET_ID_DPU_AXI'
Lexical error: Documentation/devicetree/bindings/display/verisilicon,dc.example.dts:43.22-45 Unexpected 'TH1520_RESET_ID_DPU_AHB'
FATAL ERROR: Syntax error parsing input tree
make[2]: *** [scripts/Makefile.dtbs:132: Documentation/devicetree/bindings/display/verisilicon,dc.example.dtb] Error 1
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [/builds/robherring/dt-review-ci/linux/Makefile:1527: dt_binding_check] Error 2
make: *** [Makefile:248: __sub-make] Error 2

doc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/20250814164048.2336043-3-uwu@icenowy.me

The base for the series is generally the latest rc1. A different dependency
should be noted in *this* patch.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:

pip3 install dtschema --upgrade

Please check and re-submit after running the above command yourself. Note
that DT_SCHEMA_FILES can be set to your schema file to speed up checking
your schema. However, it must be unset to test all examples with your schema.