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Fri, 16 Jan 2026 04:08:27 -0600 Received: from [172.24.233.20] (a0512632.dhcp.ti.com [172.24.233.20]) by lelvem-mr05.itg.ti.com (8.18.1/8.18.1) with ESMTP id 60GA8J243112234; Fri, 16 Jan 2026 04:08:20 -0600 Message-ID: Date: Fri, 16 Jan 2026 15:38:19 +0530 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 1/3] dt-bindings: display: ti,am65x-dss: Add am62p dss compatible To: Michael Walle , Krzysztof Kozlowski CC: , , , , , , , , , , , , , , , , , References: <20260107174525.1702585-1-s-jain1@ti.com> <20260107174525.1702585-2-s-jain1@ti.com> <20260108-expert-whippet-of-downpour-ba277f@quoll> Content-Language: en-US From: Swamil Jain In-Reply-To: Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-C2ProcessedOrg: 333ef613-75bf-4e12-a4b1-8e3623f5dcea X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN1PEPF0002636C:EE_|SJ2PR10MB7857:EE_ X-MS-Office365-Filtering-Correlation-Id: b8be3e39-342e-4ac1-b2b6-08de54e73333 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|34020700016|7416014|1800799024|376014|36860700013|82310400026|12100799066; 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X-OriginatorOrg: ti.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Jan 2026 10:08:30.5727 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b8be3e39-342e-4ac1-b2b6-08de54e73333 X-MS-Exchange-CrossTenant-Id: e5b49634-450b-4709-8abb-1e2b19b982b7 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=e5b49634-450b-4709-8abb-1e2b19b982b7;Ip=[198.47.21.195];Helo=[flwvzet201.ext.ti.com] X-MS-Exchange-CrossTenant-AuthSource: SN1PEPF0002636C.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ2PR10MB7857 Hi Michael, On 1/14/26 16:11, Michael Walle wrote: > Hi, > > On Thu Jan 8, 2026 at 9:51 AM CET, Krzysztof Kozlowski wrote: >>> + - if: >>> + properties: >>> + compatible: >>> + contains: >>> + const: ti,am62p-dss >>> + then: >>> + properties: >>> + power-domains: >>> + minItems: 1 >>> + maxItems: 3 >> >> This is still not constrained enough. You need to define the items >> instead. I still do not understand why number of power domains is >> flexible. > > So looking at the downstream devicetree, there is one power domain > for each OLDI and for the DSS itself. Thus, in the am62p case, there > are two DSS as described above, so DSS0 has a power domain for dss0 > and two power domains for the OLDI transmitters. The same for dss1 > but with just one OLDI transmitter. > > So I don't know why there is minItems: 1 because it's either 2 or 3. One can use DSS power-domain only, if they don't want to use OLDI0 or OLDI1. > > What about the following: > > .. > - if: > properties: > compatible: > contains: > const: ti,am62p-dss > then: > properties: > power-domains: > minItems: 2 > items: > - description: DSS controller > - description: OLDI0 transmitter > - description: OLDI1 transmitter > else: > properties: > power-domains: > maxItems: 1 > > -michael Using the following: .. power-domains: minItems: 1 description: phandle to the associated power domain(s). items: - description: DSS controller power domain - description: OLDI0 power domain - description: OLDI1 power domain And using constraints for "ti,am62p-dss" and other compatibles separately. Please check v4[1]. [1]: https://lore.kernel.org/all/20260116095406.2544565-2-s-jain1@ti.com/ Regards, Swamil.