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Message-ID: <20dfe41f-7aca-4321-a5e9-5c6b8513b400@nxp.com>
Date: Mon, 14 Oct 2024 18:01:49 +0800
From: Liu Ying <victor.liu@....com>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc: dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, imx@...ts.linux.dev,
linux-arm-kernel@...ts.infradead.org, andrzej.hajda@...el.com,
neil.armstrong@...aro.org, rfoss@...nel.org,
Laurent.pinchart@...asonboard.com, jonas@...boo.se,
jernej.skrabec@...il.com, airlied@...il.com, simona@...ll.ch,
maarten.lankhorst@...ux.intel.com, mripard@...nel.org, tzimmermann@...e.de,
robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org,
shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
festevam@...il.com, catalin.marinas@....com, will@...nel.org,
quic_bjorande@...cinc.com, geert+renesas@...der.be, arnd@...db.de,
nfraprado@...labora.com, o.rempel@...gutronix.de, y.moog@...tec.de,
marex@...x.de, isaac.scott@...asonboard.com, biju.das.jz@...renesas.com
Subject: Re: [PATCH v2 5/9] dt-bindings: display: bridge: Add ITE IT6263 LVDS
to HDMI converter
On 10/14/2024, Dmitry Baryshkov wrote:
[...]
>>>>> My suggestion would be to add a single root-level property which
>>>>> specifies which port provides even pixel data.
>>>>
>>>> That won't work. The LVDS source side expects the ports of
>>>> the sink side specify dual-lvds-{odd,even}-pixels properties.
>>>
>>> I didn't notice that these properties are already defined.
>>>
>>> As these properties are common between several schema files, please
>>> extract them to a common schema file (like lvds.yaml).
>>
>> I'm not sure how to do that. Is it obvious?
>> Please shed some light.
>>
>> Only two panel schema files are defining even/odd pixels now -
>> advantech,idk-2121wr.yaml and panel-simple-lvds-dual-ports.yaml.
>> Maybe, extract them later when more schema files(especially for
>> bridges) try to define the same? I'd like to keep a low profile
>> for now.
>
> I'd say, please extract those now. Adding third is more than enough and
> should be avoided. Extracting is pretty simple. One patch to move the
> definition and descriptions from panel-simple-lvds-dual-ports to a
> common location (e.g. lvds-dual-ports.yaml). Leave the required
> constrains in place. Second patch is to add oneOf constraints to the
> ports.
oneOf just sits below ports so that single-port and dual-port
are documented separately? That won't pass dt_binding_check
as the v1 binding has proved that warnings will be generated.
> port@0 might get the same oneOf + the
> dual-lvds-{odd,even}-pixels:false case, allowing a single-port
> definition.
I don't catch this.
Below snippet is a draft lvds-dual-port.yaml.
How can it be referenced in ite,it6263.yaml?
---8<---
allOf:
- $ref: lvds.yaml#
properties:
ports:
$ref: /schemas/graph.yaml#/properties/ports
properties:
port@0:
$ref: /schemas/graph.yaml#/$defs/port-base
unevaluatedProperties: false
description: the first LVDS input link
properties:
dual-lvds-odd-pixels:
type: boolean
description: the first sink port for odd pixels
dual-lvds-even-pixels:
type: boolean
description: the first sink port for even pixels
oneOf:
- required: [dual-lvds-even-pixels]
- required: [dual-lvds-odd-pixels]
port@1:
$ref: /schemas/graph.yaml#/$defs/port-base
unevaluatedProperties: false
description: the second LVDS input link
properties:
dual-lvds-even-pixels:
type: boolean
description: the second sink port for even pixels
dual-lvds-odd-pixels:
type: boolean
description: the second sink port for odd pixels
oneOf:
- required: [dual-lvds-even-pixels]
- required: [dual-lvds-odd-pixels]
required:
- port@0
- port@1
unevaluatedProperties: false
---8<---
--
Regards,
Liu Ying
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