linux-kernel - Re: [PATCH v3 4/6] dt-bindings: display: mediatek: disp-tdshp: Add support for MT8196

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Message-ID: <ee7b16097fbc7c5cc6b8c3163447d48ead0d44f5.camel@mediatek.com>
Date: Sun, 21 Sep 2025 04:39:57 +0000
From: Jay Liu (刘博) <Jay.Liu@...iatek.com>
To: "krzk@...nel.org" <krzk@...nel.org>
CC: "linux-mediatek@...ts.infradead.org" <linux-mediatek@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"chunkuang.hu@...nel.org" <chunkuang.hu@...nel.org>,
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	<matthias.bgg@...il.com>, "krzk+dt@...nel.org" <krzk+dt@...nel.org>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Subject: Re: [PATCH v3 4/6] dt-bindings: display: mediatek: disp-tdshp: Add
 support for MT8196

On Mon, 2025-08-11 at 09:52 +0200, Krzysztof Kozlowski wrote:
> External email : Please do not click links or open attachments until
> you have verified the sender or the content.
> 
> 
> On Fri, Aug 08, 2025 at 08:53:59PM +0800, Jay Liu wrote:
> > Add disp-tdshp hardware description for MediaTek MT8196 SoC
> > 
> > Signed-off-by: Jay Liu <jay.liu@...iatek.com>
> > ---
> >  .../display/mediatek/mediatek,disp-tdshp.yaml | 52
> > +++++++++++++++++++
> >  1 file changed, 52 insertions(+)
> >  create mode 100644
> > Documentation/devicetree/bindings/display/mediatek/mediatek,disp-
> > tdshp.yaml
> 
> We expect filename based on compatibles (see writing bindings).
> 
> > 
> > diff --git
> > a/Documentation/devicetree/bindings/display/mediatek/mediatek,disp-
> > tdshp.yaml
> > b/Documentation/devicetree/bindings/display/mediatek/mediatek,disp-
> > tdshp.yaml
> > new file mode 100644
> > index 000000000000..94aa33a2a5ed
> > --- /dev/null
> > +++
> > b/Documentation/devicetree/bindings/display/mediatek/mediatek,disp-
> > tdshp.yaml
> > @@ -0,0 +1,52 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: 
> > https://urldefense.com/v3/__http://devicetree.org/schemas/display/mediatek/mediatek,disp-tdshp.yaml*__;Iw!!CTRNKA9wMg0ARbw!iQm_1HzyfT_nSaK-KNbXByLmW5dXythQCPEJzW-_ibXiLJyOKzw08MgQui4GKRmJ3QjHIj0zl1x1$
> > +$schema: 
> > https://urldefense.com/v3/__http://devicetree.org/meta-schemas/core.yaml*__;Iw!!CTRNKA9wMg0ARbw!iQm_1HzyfT_nSaK-KNbXByLmW5dXythQCPEJzW-_ibXiLJyOKzw08MgQui4GKRmJ3QjHIsmf4urv$
> > +
> > +title: MediaTek display 2D sharpness processor
> > +
> > +maintainers:
> > +  - Chun-Kuang Hu <chunkuang.hu@...nel.org>
> > +  - Philipp Zabel <p.zabel@...gutronix.de>
> > +
> > +description: |
> > +  MediaTek display 2D sharpness processor, namely TDSHP, provides
> > a
> > +  operation used to adjust sharpness in display system.
> > +  TDSHP device node must be siblings to the central MMSYS_CONFIG
> > node.
> 
> Heh? Why would this have to be a sibling? This is really odd, because
> you cannto actually rely on that.
> 
hi Krzysztof,
disp-tdshp is one of components of display pipeline. just like OVL,
color, etc. MMSYS_CONFIG controls the clock of display pipeline,

> You just added unverifiable unusual ABI with no explanation.
> 
> 
> > +  For a description of the MMSYS_CONFIG binding, see
> > +  Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.ya
> > ml
> > +  for details.
> > +
> > +properties:
> > +  compatible:
> > +    items:
> 
> Drop, just enum.
> 
> > +      - enum:
> > +          - mediatek,mt8196-disp-tdshp
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  clocks:
> > +    maxItems: 1
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +  - clocks
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  - |
> > +
> 
> Drop blank line
> 
> > +    soc {
> > +      #address-cells = <2>;
> > +      #size-cells = <2>;
> 
> messed indentation
> 
> > +
> > +      disp-tdshp@...e0000 {
> 
> Node names should be generic. See also an explanation and list of
> examples (not exhaustive) in DT specification:
> 
https://urldefense.com/v3/__https://devicetree-specification.readthedocs.io/en/latest/chapter2-devicetree-basics.html*generic-names-recommendation__;Iw!!CTRNKA9wMg0ARbw!iQm_1HzyfT_nSaK-KNbXByLmW5dXythQCPEJzW-_ibXiLJyOKzw08MgQui4GKRmJ3QjHIjQOIUWC$
> 
> e.g. image-processor
> 
> Best regards,
> Krzysztof
>