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Thu, 15 Oct 2026 16:22:44 +0000 Date: Thu, 15 Oct 2026 11:22:33 -0500 From: Frank Li To: Liu Ying Cc: Alexander Stein , Frank Li , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Dong Aisheng , imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux@ew.tq-group.com Subject: Re: [PATCH v2 2/5] arm64: dts: imx8qxp: Add display controller subsystem Message-ID: References: <20261014071657.118378-1-alexander.stein@ew.tq-group.com> <20261014071657.118378-3-alexander.stein@ew.tq-group.com> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-ClientProxiedBy: SJ0PR03CA0264.namprd03.prod.outlook.com (2603:10b6:a03:3a0::29) To GV2PR04MB11799.eurprd04.prod.outlook.com (2603:10a6:150:2cf::9) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: GV2PR04MB11799:EE_|AS1PR04MB9238:EE_ X-MS-Office365-Filtering-Correlation-Id: 49cfd447-0005-43f5-556b-08df2ad88ad9 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|23010399003|366016|376014|7416014|19092799006|56012099006|11063799006|4143699003|261009223027099003|18002099003|10067099003|22082099003; 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> > + clocks = <&dc0_disp_lpcg IMX_LPCG_CLK_1>; > > + interrupt-parent = <&dc0_intc>; > > + interrupts = <28>, <29>, <30>, <31>, > > + <45>, <46>, <47>, <48>; > > + interrupt-names = "int0", "int1", "int2", "int3", > > + "primsync_on", "primsync_off", > > + "secsync_on", "secsync_off"; > > + }; > > + > > + dc0_tcon1: tcon@5618e400 { > > + reg = <0x5618e400 0x588>; > > + > > + port { > > + dc0_disp1_dc0_pixel_combiner_ch1: endpoint { > > + remote-endpoint = <&dc0_pixel_combiner_ch1_dc0_disp1>; > > + }; > > + }; > > + }; > > + }; > > + }; > > I'm thinking that it would be good to have a complete display controller > DT node in the first place, including those prefetch engines attached to > fetchunits through the fsl,prg property. what's current prefetch engines status? Is it possible merge at v7.5 ? Frank > In this way, display controller > driver's life would be easier - all child/grandchild devices are always > available. I'm considering to adding a check to the Linux display controller > driver to ensure the availability(at least for critical child/grandchild > devices). > > -- > Regards, > Liu Ying >