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Received: from AM7PR04MB7046.eurprd04.prod.outlook.com (2603:10a6:20b:113::22) by DU2PR04MB9082.eurprd04.prod.outlook.com (2603:10a6:10:2f1::10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9745.28; Mon, 30 Mar 2026 02:03:57 +0000 Received: from AM7PR04MB7046.eurprd04.prod.outlook.com ([fe80::4609:64af:8a4b:fd64]) by AM7PR04MB7046.eurprd04.prod.outlook.com ([fe80::4609:64af:8a4b:fd64%3]) with mapi id 15.20.9745.027; Mon, 30 Mar 2026 02:03:57 +0000 Message-ID: Date: Mon, 30 Mar 2026 10:05:11 +0800 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] dt-bindings: display: bridge: ldb: Require reg property only for i.MX6SX/8MP LDBs To: Marco Felsch Cc: Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , David Airlie , Simona Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Marek Vasut , Laurentiu Palcu , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260329-fsl_ldb_schema_fix-v1-1-351372754bc0@nxp.com> From: Liu Ying Content-Language: en-US In-Reply-To: Content-Type: text/plain; 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This is the case for all SoCs i.MX6SX/8MP/93. The reality is that i.MX6SX and i.MX8MP LDB DT nodes are already in-tree. People may take them as ABI(not only for Linux, but also for other potential projects which use the LDB schema and/or the DT nodes). > >> Fixes: 8aa2f0ac08d3 ("dt-bindings: display: bridge: ldb: Add check for reg and reg-names") > > Therefore I would just revert this patch completely. IMHO, it doesn't make too much difference between my patch and reverting this offending patch, because of the ABI, i.e., the reg properties in i.MX6SX and i.MX8MP LDB DT nodes are supposed to be stable. I feel that what you are asking for is even more than simply reverting this offending patch, that is to say, completely disallowing the reg and reg-names properties for LDBs across all SoCs. But again, that would break the ABI. > > Regards, > Marco > >> Signed-off-by: Liu Ying >> --- >> .../bindings/display/bridge/fsl,ldb.yaml | 23 ++++++++++++++++------ >> 1 file changed, 17 insertions(+), 6 deletions(-) >> >> diff --git a/Documentation/devicetree/bindings/display/bridge/fsl,ldb.yaml b/Documentation/devicetree/bindings/display/bridge/fsl,ldb.yaml >> index 7f380879fffd..5f6dc2b11d7b 100644 >> --- a/Documentation/devicetree/bindings/display/bridge/fsl,ldb.yaml >> +++ b/Documentation/devicetree/bindings/display/bridge/fsl,ldb.yaml >> @@ -28,6 +28,7 @@ properties: >> const: ldb >> >> reg: >> + minItems: 1 >> maxItems: 2 >> >> reg-names: >> @@ -68,7 +69,6 @@ required: >> - compatible >> - clocks >> - ports >> - - reg >> >> allOf: >> - if: >> @@ -83,12 +83,23 @@ allOf: >> ports: >> properties: >> port@2: false >> + >> - if: >> - not: >> - properties: >> - compatible: >> - contains: >> - const: fsl,imx6sx-ldb >> + properties: >> + compatible: >> + contains: >> + enum: >> + - fsl,imx6sx-ldb >> + - fsl,imx8mp-ldb >> + then: >> + required: >> + - reg >> + >> + - if: >> + properties: >> + compatible: >> + contains: >> + const: fsl,imx8mp-ldb >> then: >> required: >> - reg-names >> >> --- >> base-commit: 3b058d1aeeeff27a7289529c4944291613b364e9 >> change-id: 20260329-fsl_ldb_schema_fix-4fe01c42bff3 >> >> Best regards, >> -- >> Liu Ying >> >> > -- Regards, Liu Ying