From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DA146C636D3 for ; Tue, 31 Jan 2023 00:58:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229786AbjAaA6L (ORCPT ); Mon, 30 Jan 2023 19:58:11 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38754 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229490AbjAaA6J (ORCPT ); Mon, 30 Jan 2023 19:58:09 -0500 Received: from EUR02-DB5-obe.outbound.protection.outlook.com (mail-db5eur02on2059.outbound.protection.outlook.com [40.107.249.59]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BEECD22A24; Mon, 30 Jan 2023 16:58:06 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=Q3yhp3wrAtgLyyG22056/CAgSJ8UNP7EIk5t2rEIezF0GtH4ReEQV5Owtp3RLhg0h9FlhRC1GFW9qbfxjs0pfcbLMDzXFnp0fZaFEKV4duYO9NGxgsyWcVsdhZoq2Arr6mcnyULfNtkeLlhB6GuUFy4l7oviUvJODzHtUHFPtV+0CVRPAM1kVtGA1ONrhpfOcSjTQy4DtXITFuDS7e7FTgGUedwQI/jlMBWPqoWilCaNFcBurwc55ec/dRcjNsWHKx8zE94AjP4uTMkTekk7gSGivt5MI9ay3KHbi5VLlNPGfXR/+mP4r0Ohp16ZqN+Wm9jh0+Y8jD5Ka98KznFp9A== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=AXo0FhvgGfrvUGV4+CSo13zq1gRlG4q/+PMR+vMhZp0=; b=KJK/YtprCt2L6ZMI0DR4EF7wUj1S4yYEqd3hLn+o50G51CamxywcRfomUU9uaTS561ufnwqc/6xZ4Lw8CSfMg7l9vKDGLbV/rXPPcJWyBe4HpDUQtOLaz2agnQvp0RMPIq9i4Oc3d+5XUqs3jMZgxCEx8O51DlC6zc5YRy6Cjg0EVUNfKEJuC8n0hPhqKkIlXQFMxqr3FK+DBv5Hqh/HMEsR/2J14rNc7t70ksECp8FEk2YeP6GOX9RPiZHKpfsfWrI+pc1ANAwPbT8vAo0kNLqwBzYnISP5ky9nohoc3ux8C29lJDxPG9GdjKEABaR57RH9bEGKJsVPCqwO57qXzA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nxp.com; dmarc=pass action=none header.from=nxp.com; dkim=pass header.d=nxp.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nxp.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=AXo0FhvgGfrvUGV4+CSo13zq1gRlG4q/+PMR+vMhZp0=; b=gt0kVDoSqw7UkSphWFtfPftMa39olMpzAlBKPAoA+z9OxlNIkkdraku/AHsnOH0QigkZ2cZzJSJhRN/mLG5T7fFC9twh1HHHprnIU5NkPaFHddNd2leYUP93wMmu3zp/wrfxiQsCvbsnkIKiuYRwmJ+DlvWTRIcT1l7Fi63iIvQ= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nxp.com; Received: from AM7PR04MB7046.eurprd04.prod.outlook.com (2603:10a6:20b:113::22) by AS1PR04MB9557.eurprd04.prod.outlook.com (2603:10a6:20b:481::19) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6043.22; Tue, 31 Jan 2023 00:58:04 +0000 Received: from AM7PR04MB7046.eurprd04.prod.outlook.com ([fe80::5725:92ec:f43e:f5fc]) by AM7PR04MB7046.eurprd04.prod.outlook.com ([fe80::5725:92ec:f43e:f5fc%9]) with mapi id 15.20.6043.038; Tue, 31 Jan 2023 00:58:04 +0000 Message-ID: <4681d86b5061e8176da2637970d681fa365d24f8.camel@nxp.com> Subject: Re: [PATCH 1/2] dt-bindings: display: bridge: Add NXP i.MX93 parallel display format configuration From: Liu Ying To: Rob Herring Cc: peng.fan@nxp.com, Krzysztof Kozlowski , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, andrzej.hajda@intel.com, neil.armstrong@linaro.org, robert.foss@linaro.org, Laurent.pinchart@ideasonboard.com, jonas@kwiboo.se, jernej.skrabec@gmail.com, airlied@gmail.com, daniel@ffwll.ch, krzysztof.kozlowski+dt@linaro.org, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com Date: Tue, 31 Jan 2023 08:57:31 +0800 In-Reply-To: <20230130213904.GA3569183-robh@kernel.org> References: <20230128034713.1530218-1-victor.liu@nxp.com> <20230128034713.1530218-2-victor.liu@nxp.com> <3c07b9bd-1981-2945-9efe-80afb0195de8@linaro.org> <87d6f54c4695330064eda295e258a0a5c3bc48f8.camel@nxp.com> <20230130213904.GA3569183-robh@kernel.org> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.28.5-0ubuntu0.18.04.2 Content-Transfer-Encoding: 7bit X-ClientProxiedBy: SI1PR02CA0057.apcprd02.prod.outlook.com (2603:1096:4:1f5::10) To AM7PR04MB7046.eurprd04.prod.outlook.com (2603:10a6:20b:113::22) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AM7PR04MB7046:EE_|AS1PR04MB9557:EE_ X-MS-Office365-Filtering-Correlation-Id: 0df09f58-5d40-490e-d64b-08db032634e7 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:AM7PR04MB7046.eurprd04.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230025)(4636009)(376002)(396003)(136003)(346002)(366004)(39860400002)(451199018)(966005)(6512007)(6666004)(316002)(53546011)(186003)(26005)(8676002)(6486002)(478600001)(6506007)(66946007)(52116002)(45080400002)(2616005)(4326008)(38100700002)(86362001)(38350700002)(66556008)(5660300002)(2906002)(6916009)(36756003)(8936002)(66476007)(41300700001)(7416002)(99106002);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?MFg2SUppek56WElDbkIwZGMzNTdvS1pub3pzbWZyWDdUbG5IenFLT3RIVHN2?= =?utf-8?B?OWlXajV4YTFzK2xhNGJ1ajZFV29mM1NBQnJja2hDZWhGVnk2c3hlUnpEaUla?= =?utf-8?B?anlIbU1uczF3ZjgvQzd0Ym9GVlNPeUNxMlIrcW00ZjFTMFNPOVROM1VIUWJu?= =?utf-8?B?VDRvaHh4ZHR4WkdxQ1IwQ0xoeGlkK0pkSDB3ek1TVERxSlhJeGY0aHg1WUxj?= =?utf-8?B?T3B0Q0p2VzNNblhISVpQSjZOTmRlWWhzdTMzYkNoRHRTNGNpM1c0dTgxaE9p?= =?utf-8?B?dmtZTUF2QWtSZUVjSGk0dmhWc085c3plR1RtbURFOUdxV3g2em9wa1dGK0NC?= =?utf-8?B?TUdEbHcwd1RmZTVxb0VFRnQ1U2V6NkJnUTNsRnZjcHJmek1PN0hBQXlvVElZ?= =?utf-8?B?SFh6ekQwemNvbnVsL21YMWtsUStjUmU0M1lUV3pjZVVaRzJHUE5mcDgvaFVC?= =?utf-8?B?eC9DNW1IdmJUU1lHNUNoQUMvK200U0JzWjRqNCt4WkxoandlYWo3Q2dJb2oz?= =?utf-8?B?WjRIei9KeUxCallRWTFmdURDS0FlUDVqSklDRStvb0NiOXZIRjJnN08zcGw1?= =?utf-8?B?ekx0bFFvZ3dIYzVOaW9ZY2o4RXEzOThpSEFvZitaYUxuMWJ4ZzJJcG5XWHFr?= =?utf-8?B?T0dKLzdZMDFnT1ppdVlPTWdWMmM2K2ZaQmpINkNjZkFkK0pQNmlNSHR0TmR5?= =?utf-8?B?amYwZ1ZDdmZrUUFTdjNMMkJkclA4Z3F5Yk1hcFcyZmxSVG5QcmQ5K3BKcklu?= =?utf-8?B?eFJDa2NYMEI1Y2dwdlhFNHcydW02VXV2K2UzTENIdzlHZjFoRGNLMFpBOE96?= =?utf-8?B?aks3aWQ0cnBqaUVPSlI0ZE9qcFVxTGxwV1VxelhSV1EvMWxNVnFMc2ZNaGlN?= =?utf-8?B?ODBYUWd6QnQ0Vmo2Z1AyZjZMM1A0RmtRVFoxMXBzYmhLNE4wdzc2b01RcWxm?= =?utf-8?B?eGw2ZFloR1pqUnUvQ3JMd1U4aTVqeFNuQno0N2FOSHVZYUZndU03OXY5NmpC?= =?utf-8?B?TGtMbFBvLzI4L2FHdE1NNjYwL3k1L3dlNHc0UXdZVlUwZ2hMZGxUUVhqSTVv?= =?utf-8?B?MEFzekhoSFNPM2J5T3hEVFNrS0xlTkthRjFpdzluZnkrUWJtck1FQnQ4cFR0?= =?utf-8?B?UzhSTVBVT3Y5RTNGd3M5RFpWS2UvaFRjaW5EcGhHbVJaYWRFMWRvTkt2cERW?= =?utf-8?B?MGlRNXdpU3VyOE1HK1ZlLzM1M0FkQlg4MzVRRCt6ZGkwSkMxd240UWdHNzNy?= =?utf-8?B?MTZTVWtka2wrbTRxTDJTWWpadVJjclNoL1RDUDVoSmM5M2x4T0FuSEtTRDNL?= =?utf-8?B?UXVRbmhkNytzZS9tWFpHYjl6T0ZVSzlZVmQyNCtGbU9xOEdKMm5icGd0VytR?= =?utf-8?B?L3BlUk5rak9vU3YrZWNmTnFxSTBVM3VTQXhGWlV5bjNFcitxVEpNWGQvY1Mw?= =?utf-8?B?US9VOVY2ajNhaVVOSUFoZ2pMamN5d3kyRHd1U0RwRWxvSjlrTzFYZ1h5NjFz?= =?utf-8?B?SEpWZ0krQ1lRaDZqZExsdmRGeFBmQUptUmkvRkJ3WTFiaW9vM3UxaUhKOXdG?= =?utf-8?B?ZXhDWWduWElWc1JveE50N2Y1R1hVczdibnYvNmpyVG5XSDZlNkhFcUFldDZO?= =?utf-8?B?Q2Y3bnVDTzRKRjJtWmk5akM5ZzdhVnpaYm9DeFAreGt3dldVN0pVWnE2YzQ5?= =?utf-8?B?K3ZmSUVmcGdSRUlQV0Q2WVNTYjNpbFdwYUhpM3Zja0hLWEhFeDkyNzZYZ1Rh?= =?utf-8?B?Nll1MUJBbW9lazlpb3cwMVBIWG1jbnY2SUJrUWU3MnhWcTZuMTJsWDVDWjVU?= =?utf-8?B?S1p2aWV5NUExWmxNZUZHVzNiaU5BSVpGcFhVQi82bU10ZXcrRllWWERCNURJ?= =?utf-8?B?bnlFT3U2YzZ2VXBzNDVBZmxaSUgwdno5TGJWcTBUYUxZczI2NUIrOUpNQ0ht?= =?utf-8?B?N05wclRqamJQcTFiajJpNkJOcGJ0TzU3TkZZTkJQUExGQlp0MldEYlNyNlVJ?= =?utf-8?B?bjFRS25QMm9wS2d2TzgxaTJjcnhuZ0NIT0xGMUlhaHRRODhVVkdNVU1OdVBu?= =?utf-8?B?WjFBSWV3NTQ5anZvVnNkQk9zME5NeXErcnBPbmJRcU9uMDlXcjNPNUYvVTFT?= =?utf-8?Q?eYJFN1QPikpjWyFrq2znoaaGE?= X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 0df09f58-5d40-490e-d64b-08db032634e7 X-MS-Exchange-CrossTenant-AuthSource: AM7PR04MB7046.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 31 Jan 2023 00:58:04.1506 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 82SETDtQcReY5/Pi2dfTZWTf62z/GukbQPjaaVs7GIYgCQ4Q45NFssq53OURQiMWEBIKS6RdPN8LAcUoSXlsDw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: AS1PR04MB9557 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2023-01-30 at 15:39 -0600, Rob Herring wrote: > On Mon, Jan 30, 2023 at 04:39:05PM +0800, Liu Ying wrote: > > On Sun, 2023-01-29 at 12:46 +0100, Krzysztof Kozlowski wrote: > > > On 28/01/2023 04:47, Liu Ying wrote: > > > > NXP i.MX93 mediamix blk-ctrl contains one DISPLAY_MUX register > > > > which > > > > configures parallel display format by using the > > > > "PARALLEL_DISP_FORMAT" > > > > field. Add device tree bindings for the display format > > > > configuration. > > > > > > > > Signed-off-by: Liu Ying > > > > --- > > > > .../display/bridge/nxp,imx93-pdfc.yaml | 78 > > > > +++++++++++++++++++ > > > > 1 file changed, 78 insertions(+) > > > > create mode 100644 > > > > Documentation/devicetree/bindings/display/bridge/nxp,imx93- > > > > pdfc.yaml > > > > > > > > diff --git > > > > a/Documentation/devicetree/bindings/display/bridge/nxp,imx93- > > > > pdfc.yaml > > > > b/Documentation/devicetree/bindings/display/bridge/nxp,imx93- > > > > pdfc.yaml > > > > new file mode 100644 > > > > index 000000000000..a84bfb46b01d > > > > --- /dev/null > > > > +++ > > > > b/Documentation/devicetree/bindings/display/bridge/nxp,imx93- > > > > pdfc.yaml > > > > @@ -0,0 +1,78 @@ > > > > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > > > > +%YAML 1.2 > > > > +--- > > > > +$id: > > > > https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevicetree.org%2Fschemas%2Fdisplay%2Fbridge%2Fnxp%2Cimx93-pdfc.yaml%23&data=05%7C01%7Cvictor.liu%40nxp.com%7C3e8db7ce3170451bc0e208db030a6ad0%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C638107115502467822%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=c%2BQ%2Bhpov6L9b905ozKPrkWiTzaRD3ZFsEh0urw5evsQ%3D&reserved=0 > > > > +$schema: > > > > https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevicetree.org%2Fmeta-schemas%2Fcore.yaml%23&data=05%7C01%7Cvictor.liu%40nxp.com%7C3e8db7ce3170451bc0e208db030a6ad0%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C638107115502467822%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=SkPZLJIR9uoqk4mRqSsfu963S%2Baa7xXmyCqzR36LJ30%3D&reserved=0 > > > > + > > > > +title: NXP i.MX93 Parallel Display Format Configuration > > > > + > > > > +maintainers: > > > > + - Liu Ying > > > > + > > > > +description: | > > > > + The i.MX93 mediamix blk-ctrl contains one DISPLAY_MUX > > > > register > > > > which > > > > + configures parallel display format by using the > > > > "PARALLEL_DISP_FORMAT" > > > > + field. > > > > + > > > > +properties: > > > > + compatible: > > > > + const: nxp,imx93-pdfc > > > > > > > > > Based on description, I have doubts this is a separate bridge > > > device. > > > Why this is not part of display driver/bindings? > > > > The relevant display controller in i.MX93 SoC is LCDIF. From > > hardware > > design PoV, the parallel display format configuration logic is not > > a > > part of LCDIF. Instead, it's a part of i.MX93 mediamix blk-ctrl. > > The > > blk-ctrl includes controls for miscellaneous devices with small > > logics, > > like this parallel display format configuration, LVDS Display > > Bridge(LDB, see fsl,ldb.yaml) and so on. The below pipeline > > describes > > data flow of a parallel display LCD panel: > > > > DRAM -> LCDIF -> parallel display format configuration -> LCD panel > > > > So, the parallel display format configuration appears to be a > > separate > > bridge. > > > > > > > > We do not create usually devices for single registers, because > > > they > > > are > > > not a devices. Devices are a bit more complex - have some pin > > > inputs/outputs, not a register only. Of course there are > > > exception, > > > but > > > this one does not look like one. > > > > IMHO, this one is a standalone device although it is controlled by > > one > > single register. It's input pins connect to LCDIF and output pins > > connect to i.MX93 SoC's pins/pads. > > Fair enough. It needs to be defined as part of the mediamix blkctrl > schema though. Do you mean that we can keep this schema and need to allow child devices in fsl,imx93-media-blk-ctrl.yaml? Cc'ing Peng. Peng, it appears that you are listed in the maintainers of fsl,imx93- media-blk-ctrl.yaml. I think it needs to be extended to allow child devices. Do you consider to do that? Regards, Liu Ying > > Rob From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0F0DFC61DA4 for ; Tue, 31 Jan 2023 00:58:10 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 52C9110E307; Tue, 31 Jan 2023 00:58:09 +0000 (UTC) Received: from EUR02-DB5-obe.outbound.protection.outlook.com (mail-db5eur02on2061e.outbound.protection.outlook.com [IPv6:2a01:111:f400:fe12::61e]) by gabe.freedesktop.org (Postfix) with ESMTPS id E721410E307 for ; Tue, 31 Jan 2023 00:58:06 +0000 (UTC) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=Q3yhp3wrAtgLyyG22056/CAgSJ8UNP7EIk5t2rEIezF0GtH4ReEQV5Owtp3RLhg0h9FlhRC1GFW9qbfxjs0pfcbLMDzXFnp0fZaFEKV4duYO9NGxgsyWcVsdhZoq2Arr6mcnyULfNtkeLlhB6GuUFy4l7oviUvJODzHtUHFPtV+0CVRPAM1kVtGA1ONrhpfOcSjTQy4DtXITFuDS7e7FTgGUedwQI/jlMBWPqoWilCaNFcBurwc55ec/dRcjNsWHKx8zE94AjP4uTMkTekk7gSGivt5MI9ay3KHbi5VLlNPGfXR/+mP4r0Ohp16ZqN+Wm9jh0+Y8jD5Ka98KznFp9A== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=AXo0FhvgGfrvUGV4+CSo13zq1gRlG4q/+PMR+vMhZp0=; b=KJK/YtprCt2L6ZMI0DR4EF7wUj1S4yYEqd3hLn+o50G51CamxywcRfomUU9uaTS561ufnwqc/6xZ4Lw8CSfMg7l9vKDGLbV/rXPPcJWyBe4HpDUQtOLaz2agnQvp0RMPIq9i4Oc3d+5XUqs3jMZgxCEx8O51DlC6zc5YRy6Cjg0EVUNfKEJuC8n0hPhqKkIlXQFMxqr3FK+DBv5Hqh/HMEsR/2J14rNc7t70ksECp8FEk2YeP6GOX9RPiZHKpfsfWrI+pc1ANAwPbT8vAo0kNLqwBzYnISP5ky9nohoc3ux8C29lJDxPG9GdjKEABaR57RH9bEGKJsVPCqwO57qXzA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nxp.com; dmarc=pass action=none header.from=nxp.com; dkim=pass header.d=nxp.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nxp.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=AXo0FhvgGfrvUGV4+CSo13zq1gRlG4q/+PMR+vMhZp0=; b=gt0kVDoSqw7UkSphWFtfPftMa39olMpzAlBKPAoA+z9OxlNIkkdraku/AHsnOH0QigkZ2cZzJSJhRN/mLG5T7fFC9twh1HHHprnIU5NkPaFHddNd2leYUP93wMmu3zp/wrfxiQsCvbsnkIKiuYRwmJ+DlvWTRIcT1l7Fi63iIvQ= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nxp.com; Received: from AM7PR04MB7046.eurprd04.prod.outlook.com (2603:10a6:20b:113::22) by AS1PR04MB9557.eurprd04.prod.outlook.com (2603:10a6:20b:481::19) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6043.22; Tue, 31 Jan 2023 00:58:04 +0000 Received: from AM7PR04MB7046.eurprd04.prod.outlook.com ([fe80::5725:92ec:f43e:f5fc]) by AM7PR04MB7046.eurprd04.prod.outlook.com ([fe80::5725:92ec:f43e:f5fc%9]) with mapi id 15.20.6043.038; Tue, 31 Jan 2023 00:58:04 +0000 Message-ID: <4681d86b5061e8176da2637970d681fa365d24f8.camel@nxp.com> Subject: Re: [PATCH 1/2] dt-bindings: display: bridge: Add NXP i.MX93 parallel display format configuration From: Liu Ying To: Rob Herring Date: Tue, 31 Jan 2023 08:57:31 +0800 In-Reply-To: <20230130213904.GA3569183-robh@kernel.org> References: <20230128034713.1530218-1-victor.liu@nxp.com> <20230128034713.1530218-2-victor.liu@nxp.com> <3c07b9bd-1981-2945-9efe-80afb0195de8@linaro.org> <87d6f54c4695330064eda295e258a0a5c3bc48f8.camel@nxp.com> <20230130213904.GA3569183-robh@kernel.org> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.28.5-0ubuntu0.18.04.2 Content-Transfer-Encoding: 7bit X-ClientProxiedBy: SI1PR02CA0057.apcprd02.prod.outlook.com (2603:1096:4:1f5::10) To AM7PR04MB7046.eurprd04.prod.outlook.com (2603:10a6:20b:113::22) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AM7PR04MB7046:EE_|AS1PR04MB9557:EE_ X-MS-Office365-Filtering-Correlation-Id: 0df09f58-5d40-490e-d64b-08db032634e7 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:AM7PR04MB7046.eurprd04.prod.outlook.com; PTR:; CAT:NONE; SFS:(13230025)(4636009)(376002)(396003)(136003)(346002)(366004)(39860400002)(451199018)(966005)(6512007)(6666004)(316002)(53546011)(186003)(26005)(8676002)(6486002)(478600001)(6506007)(66946007)(52116002)(45080400002)(2616005)(4326008)(38100700002)(86362001)(38350700002)(66556008)(5660300002)(2906002)(6916009)(36756003)(8936002)(66476007)(41300700001)(7416002)(99106002); DIR:OUT; SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?MFg2SUppek56WElDbkIwZGMzNTdvS1pub3pzbWZyWDdUbG5IenFLT3RIVHN2?= =?utf-8?B?OWlXajV4YTFzK2xhNGJ1ajZFV29mM1NBQnJja2hDZWhGVnk2c3hlUnpEaUla?= =?utf-8?B?anlIbU1uczF3ZjgvQzd0Ym9GVlNPeUNxMlIrcW00ZjFTMFNPOVROM1VIUWJu?= =?utf-8?B?VDRvaHh4ZHR4WkdxQ1IwQ0xoeGlkK0pkSDB3ek1TVERxSlhJeGY0aHg1WUxj?= =?utf-8?B?T3B0Q0p2VzNNblhISVpQSjZOTmRlWWhzdTMzYkNoRHRTNGNpM1c0dTgxaE9p?= =?utf-8?B?dmtZTUF2QWtSZUVjSGk0dmhWc085c3plR1RtbURFOUdxV3g2em9wa1dGK0NC?= =?utf-8?B?TUdEbHcwd1RmZTVxb0VFRnQ1U2V6NkJnUTNsRnZjcHJmek1PN0hBQXlvVElZ?= =?utf-8?B?SFh6ekQwemNvbnVsL21YMWtsUStjUmU0M1lUV3pjZVVaRzJHUE5mcDgvaFVC?= =?utf-8?B?eC9DNW1IdmJUU1lHNUNoQUMvK200U0JzWjRqNCt4WkxoandlYWo3Q2dJb2oz?= =?utf-8?B?WjRIei9KeUxCallRWTFmdURDS0FlUDVqSklDRStvb0NiOXZIRjJnN08zcGw1?= =?utf-8?B?ekx0bFFvZ3dIYzVOaW9ZY2o4RXEzOThpSEFvZitaYUxuMWJ4ZzJJcG5XWHFr?= =?utf-8?B?T0dKLzdZMDFnT1ppdVlPTWdWMmM2K2ZaQmpINkNjZkFkK0pQNmlNSHR0TmR5?= =?utf-8?B?amYwZ1ZDdmZrUUFTdjNMMkJkclA4Z3F5Yk1hcFcyZmxSVG5QcmQ5K3BKcklu?= =?utf-8?B?eFJDa2NYMEI1Y2dwdlhFNHcydW02VXV2K2UzTENIdzlHZjFoRGNLMFpBOE96?= =?utf-8?B?aks3aWQ0cnBqaUVPSlI0ZE9qcFVxTGxwV1VxelhSV1EvMWxNVnFMc2ZNaGlN?= =?utf-8?B?ODBYUWd6QnQ0Vmo2Z1AyZjZMM1A0RmtRVFoxMXBzYmhLNE4wdzc2b01RcWxm?= =?utf-8?B?eGw2ZFloR1pqUnUvQ3JMd1U4aTVqeFNuQno0N2FOSHVZYUZndU03OXY5NmpC?= =?utf-8?B?TGtMbFBvLzI4L2FHdE1NNjYwL3k1L3dlNHc0UXdZVlUwZ2hMZGxUUVhqSTVv?= =?utf-8?B?MEFzekhoSFNPM2J5T3hEVFNrS0xlTkthRjFpdzluZnkrUWJtck1FQnQ4cFR0?= =?utf-8?B?UzhSTVBVT3Y5RTNGd3M5RFpWS2UvaFRjaW5EcGhHbVJaYWRFMWRvTkt2cERW?= =?utf-8?B?MGlRNXdpU3VyOE1HK1ZlLzM1M0FkQlg4MzVRRCt6ZGkwSkMxd240UWdHNzNy?= =?utf-8?B?MTZTVWtka2wrbTRxTDJTWWpadVJjclNoL1RDUDVoSmM5M2x4T0FuSEtTRDNL?= =?utf-8?B?UXVRbmhkNytzZS9tWFpHYjl6T0ZVSzlZVmQyNCtGbU9xOEdKMm5icGd0VytR?= =?utf-8?B?L3BlUk5rak9vU3YrZWNmTnFxSTBVM3VTQXhGWlV5bjNFcitxVEpNWGQvY1Mw?= =?utf-8?B?US9VOVY2ajNhaVVOSUFoZ2pMamN5d3kyRHd1U0RwRWxvSjlrTzFYZ1h5NjFz?= =?utf-8?B?SEpWZ0krQ1lRaDZqZExsdmRGeFBmQUptUmkvRkJ3WTFiaW9vM3UxaUhKOXdG?= =?utf-8?B?ZXhDWWduWElWc1JveE50N2Y1R1hVczdibnYvNmpyVG5XSDZlNkhFcUFldDZO?= =?utf-8?B?Q2Y3bnVDTzRKRjJtWmk5akM5ZzdhVnpaYm9DeFAreGt3dldVN0pVWnE2YzQ5?= =?utf-8?B?K3ZmSUVmcGdSRUlQV0Q2WVNTYjNpbFdwYUhpM3Zja0hLWEhFeDkyNzZYZ1Rh?= =?utf-8?B?Nll1MUJBbW9lazlpb3cwMVBIWG1jbnY2SUJrUWU3MnhWcTZuMTJsWDVDWjVU?= =?utf-8?B?S1p2aWV5NUExWmxNZUZHVzNiaU5BSVpGcFhVQi82bU10ZXcrRllWWERCNURJ?= =?utf-8?B?bnlFT3U2YzZ2VXBzNDVBZmxaSUgwdno5TGJWcTBUYUxZczI2NUIrOUpNQ0ht?= =?utf-8?B?N05wclRqamJQcTFiajJpNkJOcGJ0TzU3TkZZTkJQUExGQlp0MldEYlNyNlVJ?= =?utf-8?B?bjFRS25QMm9wS2d2TzgxaTJjcnhuZ0NIT0xGMUlhaHRRODhVVkdNVU1OdVBu?= =?utf-8?B?WjFBSWV3NTQ5anZvVnNkQk9zME5NeXErcnBPbmJRcU9uMDlXcjNPNUYvVTFT?= =?utf-8?Q?eYJFN1QPikpjWyFrq2znoaaGE?= X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 0df09f58-5d40-490e-d64b-08db032634e7 X-MS-Exchange-CrossTenant-AuthSource: AM7PR04MB7046.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 31 Jan 2023 00:58:04.1506 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 82SETDtQcReY5/Pi2dfTZWTf62z/GukbQPjaaVs7GIYgCQ4Q45NFssq53OURQiMWEBIKS6RdPN8LAcUoSXlsDw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: AS1PR04MB9557 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, peng.fan@nxp.com, jernej.skrabec@gmail.com, krzysztof.kozlowski+dt@linaro.org, neil.armstrong@linaro.org, shawnguo@kernel.org, s.hauer@pengutronix.de, jonas@kwiboo.se, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Krzysztof Kozlowski , robert.foss@linaro.org, andrzej.hajda@intel.com, linux-imx@nxp.com, kernel@pengutronix.de, linux-arm-kernel@lists.infradead.org, Laurent.pinchart@ideasonboard.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On Mon, 2023-01-30 at 15:39 -0600, Rob Herring wrote: > On Mon, Jan 30, 2023 at 04:39:05PM +0800, Liu Ying wrote: > > On Sun, 2023-01-29 at 12:46 +0100, Krzysztof Kozlowski wrote: > > > On 28/01/2023 04:47, Liu Ying wrote: > > > > NXP i.MX93 mediamix blk-ctrl contains one DISPLAY_MUX register > > > > which > > > > configures parallel display format by using the > > > > "PARALLEL_DISP_FORMAT" > > > > field. Add device tree bindings for the display format > > > > configuration. > > > > > > > > Signed-off-by: Liu Ying > > > > --- > > > > .../display/bridge/nxp,imx93-pdfc.yaml | 78 > > > > +++++++++++++++++++ > > > > 1 file changed, 78 insertions(+) > > > > create mode 100644 > > > > Documentation/devicetree/bindings/display/bridge/nxp,imx93- > > > > pdfc.yaml > > > > > > > > diff --git > > > > a/Documentation/devicetree/bindings/display/bridge/nxp,imx93- > > > > pdfc.yaml > > > > b/Documentation/devicetree/bindings/display/bridge/nxp,imx93- > > > > pdfc.yaml > > > > new file mode 100644 > > > > index 000000000000..a84bfb46b01d > > > > --- /dev/null > > > > +++ > > > > b/Documentation/devicetree/bindings/display/bridge/nxp,imx93- > > > > pdfc.yaml > > > > @@ -0,0 +1,78 @@ > > > > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > > > > +%YAML 1.2 > > > > +--- > > > > +$id: > > > > https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevicetree.org%2Fschemas%2Fdisplay%2Fbridge%2Fnxp%2Cimx93-pdfc.yaml%23&data=05%7C01%7Cvictor.liu%40nxp.com%7C3e8db7ce3170451bc0e208db030a6ad0%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C638107115502467822%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=c%2BQ%2Bhpov6L9b905ozKPrkWiTzaRD3ZFsEh0urw5evsQ%3D&reserved=0 > > > > +$schema: > > > > https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevicetree.org%2Fmeta-schemas%2Fcore.yaml%23&data=05%7C01%7Cvictor.liu%40nxp.com%7C3e8db7ce3170451bc0e208db030a6ad0%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C638107115502467822%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=SkPZLJIR9uoqk4mRqSsfu963S%2Baa7xXmyCqzR36LJ30%3D&reserved=0 > > > > + > > > > +title: NXP i.MX93 Parallel Display Format Configuration > > > > + > > > > +maintainers: > > > > + - Liu Ying > > > > + > > > > +description: | > > > > + The i.MX93 mediamix blk-ctrl contains one DISPLAY_MUX > > > > register > > > > which > > > > + configures parallel display format by using the > > > > "PARALLEL_DISP_FORMAT" > > > > + field. > > > > + > > > > +properties: > > > > + compatible: > > > > + const: nxp,imx93-pdfc > > > > > > > > > Based on description, I have doubts this is a separate bridge > > > device. > > > Why this is not part of display driver/bindings? > > > > The relevant display controller in i.MX93 SoC is LCDIF. From > > hardware > > design PoV, the parallel display format configuration logic is not > > a > > part of LCDIF. Instead, it's a part of i.MX93 mediamix blk-ctrl. > > The > > blk-ctrl includes controls for miscellaneous devices with small > > logics, > > like this parallel display format configuration, LVDS Display > > Bridge(LDB, see fsl,ldb.yaml) and so on. The below pipeline > > describes > > data flow of a parallel display LCD panel: > > > > DRAM -> LCDIF -> parallel display format configuration -> LCD panel > > > > So, the parallel display format configuration appears to be a > > separate > > bridge. > > > > > > > > We do not create usually devices for single registers, because > > > they > > > are > > > not a devices. Devices are a bit more complex - have some pin > > > inputs/outputs, not a register only. Of course there are > > > exception, > > > but > > > this one does not look like one. > > > > IMHO, this one is a standalone device although it is controlled by > > one > > single register. It's input pins connect to LCDIF and output pins > > connect to i.MX93 SoC's pins/pads. > > Fair enough. It needs to be defined as part of the mediamix blkctrl > schema though. Do you mean that we can keep this schema and need to allow child devices in fsl,imx93-media-blk-ctrl.yaml? Cc'ing Peng. Peng, it appears that you are listed in the maintainers of fsl,imx93- media-blk-ctrl.yaml. I think it needs to be extended to allow child devices. Do you consider to do that? Regards, Liu Ying > > Rob From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 91BF2C54EAA for ; Tue, 31 Jan 2023 00:59:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Date:Cc:To:From:Subject:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=rehx2+N6zpIX019h27LxTq/0XRJrU1+neuBf+OI3TiU=; b=E++ZgYvgu35kqs qD9viGjKWhrUxu5FtbPGYrRB5yHiTfe1qKzzJGCTZLGUok9n6pFQYmG+ZtOR8IJ9Y4UNRTYbQd6jy AXauzDUTqEc4K3SxvQ0+M+Q0QPWlVe6VRHOPkr2CRrVZ1atUwDqnSGNy54JQDewlVt1/oz1q2vWRZ xi8B3MO5HnfOl4gGicUk2+f39/OqRuoRycfDFuanhIUz8CXehT+Dl55HNgn4yLlyhoRVtpAUcCgzE YmpQVzL5TrjPNs2LEqSNTSPBtfCRwmFoTBjqW6wKvYLPyMFL6KP3aHrbpA953xnTpS9OUN9NtgJXs gXueu1b9s4yuvAnJpjKg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pMeyS-005xCB-OP; Tue, 31 Jan 2023 00:58:12 +0000 Received: from mail-db5eur02on2043.outbound.protection.outlook.com ([40.107.249.43] helo=EUR02-DB5-obe.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1pMeyP-005xBD-9y for linux-arm-kernel@lists.infradead.org; Tue, 31 Jan 2023 00:58:11 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=Q3yhp3wrAtgLyyG22056/CAgSJ8UNP7EIk5t2rEIezF0GtH4ReEQV5Owtp3RLhg0h9FlhRC1GFW9qbfxjs0pfcbLMDzXFnp0fZaFEKV4duYO9NGxgsyWcVsdhZoq2Arr6mcnyULfNtkeLlhB6GuUFy4l7oviUvJODzHtUHFPtV+0CVRPAM1kVtGA1ONrhpfOcSjTQy4DtXITFuDS7e7FTgGUedwQI/jlMBWPqoWilCaNFcBurwc55ec/dRcjNsWHKx8zE94AjP4uTMkTekk7gSGivt5MI9ay3KHbi5VLlNPGfXR/+mP4r0Ohp16ZqN+Wm9jh0+Y8jD5Ka98KznFp9A== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=AXo0FhvgGfrvUGV4+CSo13zq1gRlG4q/+PMR+vMhZp0=; b=KJK/YtprCt2L6ZMI0DR4EF7wUj1S4yYEqd3hLn+o50G51CamxywcRfomUU9uaTS561ufnwqc/6xZ4Lw8CSfMg7l9vKDGLbV/rXPPcJWyBe4HpDUQtOLaz2agnQvp0RMPIq9i4Oc3d+5XUqs3jMZgxCEx8O51DlC6zc5YRy6Cjg0EVUNfKEJuC8n0hPhqKkIlXQFMxqr3FK+DBv5Hqh/HMEsR/2J14rNc7t70ksECp8FEk2YeP6GOX9RPiZHKpfsfWrI+pc1ANAwPbT8vAo0kNLqwBzYnISP5ky9nohoc3ux8C29lJDxPG9GdjKEABaR57RH9bEGKJsVPCqwO57qXzA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nxp.com; dmarc=pass action=none header.from=nxp.com; dkim=pass header.d=nxp.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nxp.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=AXo0FhvgGfrvUGV4+CSo13zq1gRlG4q/+PMR+vMhZp0=; b=gt0kVDoSqw7UkSphWFtfPftMa39olMpzAlBKPAoA+z9OxlNIkkdraku/AHsnOH0QigkZ2cZzJSJhRN/mLG5T7fFC9twh1HHHprnIU5NkPaFHddNd2leYUP93wMmu3zp/wrfxiQsCvbsnkIKiuYRwmJ+DlvWTRIcT1l7Fi63iIvQ= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nxp.com; Received: from AM7PR04MB7046.eurprd04.prod.outlook.com (2603:10a6:20b:113::22) by AS1PR04MB9557.eurprd04.prod.outlook.com (2603:10a6:20b:481::19) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6043.22; Tue, 31 Jan 2023 00:58:04 +0000 Received: from AM7PR04MB7046.eurprd04.prod.outlook.com ([fe80::5725:92ec:f43e:f5fc]) by AM7PR04MB7046.eurprd04.prod.outlook.com ([fe80::5725:92ec:f43e:f5fc%9]) with mapi id 15.20.6043.038; Tue, 31 Jan 2023 00:58:04 +0000 Message-ID: <4681d86b5061e8176da2637970d681fa365d24f8.camel@nxp.com> Subject: Re: [PATCH 1/2] dt-bindings: display: bridge: Add NXP i.MX93 parallel display format configuration From: Liu Ying To: Rob Herring Cc: peng.fan@nxp.com, Krzysztof Kozlowski , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, andrzej.hajda@intel.com, neil.armstrong@linaro.org, robert.foss@linaro.org, Laurent.pinchart@ideasonboard.com, jonas@kwiboo.se, jernej.skrabec@gmail.com, airlied@gmail.com, daniel@ffwll.ch, krzysztof.kozlowski+dt@linaro.org, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com Date: Tue, 31 Jan 2023 08:57:31 +0800 In-Reply-To: <20230130213904.GA3569183-robh@kernel.org> References: <20230128034713.1530218-1-victor.liu@nxp.com> <20230128034713.1530218-2-victor.liu@nxp.com> <3c07b9bd-1981-2945-9efe-80afb0195de8@linaro.org> <87d6f54c4695330064eda295e258a0a5c3bc48f8.camel@nxp.com> <20230130213904.GA3569183-robh@kernel.org> X-Mailer: Evolution 3.28.5-0ubuntu0.18.04.2 X-ClientProxiedBy: SI1PR02CA0057.apcprd02.prod.outlook.com (2603:1096:4:1f5::10) To AM7PR04MB7046.eurprd04.prod.outlook.com (2603:10a6:20b:113::22) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AM7PR04MB7046:EE_|AS1PR04MB9557:EE_ X-MS-Office365-Filtering-Correlation-Id: 0df09f58-5d40-490e-d64b-08db032634e7 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:AM7PR04MB7046.eurprd04.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230025)(4636009)(376002)(396003)(136003)(346002)(366004)(39860400002)(451199018)(966005)(6512007)(6666004)(316002)(53546011)(186003)(26005)(8676002)(6486002)(478600001)(6506007)(66946007)(52116002)(45080400002)(2616005)(4326008)(38100700002)(86362001)(38350700002)(66556008)(5660300002)(2906002)(6916009)(36756003)(8936002)(66476007)(41300700001)(7416002)(99106002);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?MFg2SUppek56WElDbkIwZGMzNTdvS1pub3pzbWZyWDdUbG5IenFLT3RIVHN2?= =?utf-8?B?OWlXajV4YTFzK2xhNGJ1ajZFV29mM1NBQnJja2hDZWhGVnk2c3hlUnpEaUla?= =?utf-8?B?anlIbU1uczF3ZjgvQzd0Ym9GVlNPeUNxMlIrcW00ZjFTMFNPOVROM1VIUWJu?= =?utf-8?B?VDRvaHh4ZHR4WkdxQ1IwQ0xoeGlkK0pkSDB3ek1TVERxSlhJeGY0aHg1WUxj?= =?utf-8?B?T3B0Q0p2VzNNblhISVpQSjZOTmRlWWhzdTMzYkNoRHRTNGNpM1c0dTgxaE9p?= =?utf-8?B?dmtZTUF2QWtSZUVjSGk0dmhWc085c3plR1RtbURFOUdxV3g2em9wa1dGK0NC?= =?utf-8?B?TUdEbHcwd1RmZTVxb0VFRnQ1U2V6NkJnUTNsRnZjcHJmek1PN0hBQXlvVElZ?= =?utf-8?B?SFh6ekQwemNvbnVsL21YMWtsUStjUmU0M1lUV3pjZVVaRzJHUE5mcDgvaFVC?= =?utf-8?B?eC9DNW1IdmJUU1lHNUNoQUMvK200U0JzWjRqNCt4WkxoandlYWo3Q2dJb2oz?= =?utf-8?B?WjRIei9KeUxCallRWTFmdURDS0FlUDVqSklDRStvb0NiOXZIRjJnN08zcGw1?= =?utf-8?B?ekx0bFFvZ3dIYzVOaW9ZY2o4RXEzOThpSEFvZitaYUxuMWJ4ZzJJcG5XWHFr?= =?utf-8?B?T0dKLzdZMDFnT1ppdVlPTWdWMmM2K2ZaQmpINkNjZkFkK0pQNmlNSHR0TmR5?= =?utf-8?B?amYwZ1ZDdmZrUUFTdjNMMkJkclA4Z3F5Yk1hcFcyZmxSVG5QcmQ5K3BKcklu?= =?utf-8?B?eFJDa2NYMEI1Y2dwdlhFNHcydW02VXV2K2UzTENIdzlHZjFoRGNLMFpBOE96?= =?utf-8?B?aks3aWQ0cnBqaUVPSlI0ZE9qcFVxTGxwV1VxelhSV1EvMWxNVnFMc2ZNaGlN?= =?utf-8?B?ODBYUWd6QnQ0Vmo2Z1AyZjZMM1A0RmtRVFoxMXBzYmhLNE4wdzc2b01RcWxm?= =?utf-8?B?eGw2ZFloR1pqUnUvQ3JMd1U4aTVqeFNuQno0N2FOSHVZYUZndU03OXY5NmpC?= =?utf-8?B?TGtMbFBvLzI4L2FHdE1NNjYwL3k1L3dlNHc0UXdZVlUwZ2hMZGxUUVhqSTVv?= =?utf-8?B?MEFzekhoSFNPM2J5T3hEVFNrS0xlTkthRjFpdzluZnkrUWJtck1FQnQ4cFR0?= =?utf-8?B?UzhSTVBVT3Y5RTNGd3M5RFpWS2UvaFRjaW5EcGhHbVJaYWRFMWRvTkt2cERW?= =?utf-8?B?MGlRNXdpU3VyOE1HK1ZlLzM1M0FkQlg4MzVRRCt6ZGkwSkMxd240UWdHNzNy?= =?utf-8?B?MTZTVWtka2wrbTRxTDJTWWpadVJjclNoL1RDUDVoSmM5M2x4T0FuSEtTRDNL?= =?utf-8?B?UXVRbmhkNytzZS9tWFpHYjl6T0ZVSzlZVmQyNCtGbU9xOEdKMm5icGd0VytR?= =?utf-8?B?L3BlUk5rak9vU3YrZWNmTnFxSTBVM3VTQXhGWlV5bjNFcitxVEpNWGQvY1Mw?= =?utf-8?B?US9VOVY2ajNhaVVOSUFoZ2pMamN5d3kyRHd1U0RwRWxvSjlrTzFYZ1h5NjFz?= =?utf-8?B?SEpWZ0krQ1lRaDZqZExsdmRGeFBmQUptUmkvRkJ3WTFiaW9vM3UxaUhKOXdG?= =?utf-8?B?ZXhDWWduWElWc1JveE50N2Y1R1hVczdibnYvNmpyVG5XSDZlNkhFcUFldDZO?= =?utf-8?B?Q2Y3bnVDTzRKRjJtWmk5akM5ZzdhVnpaYm9DeFAreGt3dldVN0pVWnE2YzQ5?= =?utf-8?B?K3ZmSUVmcGdSRUlQV0Q2WVNTYjNpbFdwYUhpM3Zja0hLWEhFeDkyNzZYZ1Rh?= =?utf-8?B?Nll1MUJBbW9lazlpb3cwMVBIWG1jbnY2SUJrUWU3MnhWcTZuMTJsWDVDWjVU?= =?utf-8?B?S1p2aWV5NUExWmxNZUZHVzNiaU5BSVpGcFhVQi82bU10ZXcrRllWWERCNURJ?= =?utf-8?B?bnlFT3U2YzZ2VXBzNDVBZmxaSUgwdno5TGJWcTBUYUxZczI2NUIrOUpNQ0ht?= =?utf-8?B?N05wclRqamJQcTFiajJpNkJOcGJ0TzU3TkZZTkJQUExGQlp0MldEYlNyNlVJ?= =?utf-8?B?bjFRS25QMm9wS2d2TzgxaTJjcnhuZ0NIT0xGMUlhaHRRODhVVkdNVU1OdVBu?= =?utf-8?B?WjFBSWV3NTQ5anZvVnNkQk9zME5NeXErcnBPbmJRcU9uMDlXcjNPNUYvVTFT?= =?utf-8?Q?eYJFN1QPikpjWyFrq2znoaaGE?= X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 0df09f58-5d40-490e-d64b-08db032634e7 X-MS-Exchange-CrossTenant-AuthSource: AM7PR04MB7046.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 31 Jan 2023 00:58:04.1506 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 82SETDtQcReY5/Pi2dfTZWTf62z/GukbQPjaaVs7GIYgCQ4Q45NFssq53OURQiMWEBIKS6RdPN8LAcUoSXlsDw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: AS1PR04MB9557 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230130_165809_617308_4A2E361A X-CRM114-Status: GOOD ( 34.27 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, 2023-01-30 at 15:39 -0600, Rob Herring wrote: > On Mon, Jan 30, 2023 at 04:39:05PM +0800, Liu Ying wrote: > > On Sun, 2023-01-29 at 12:46 +0100, Krzysztof Kozlowski wrote: > > > On 28/01/2023 04:47, Liu Ying wrote: > > > > NXP i.MX93 mediamix blk-ctrl contains one DISPLAY_MUX register > > > > which > > > > configures parallel display format by using the > > > > "PARALLEL_DISP_FORMAT" > > > > field. Add device tree bindings for the display format > > > > configuration. > > > > > > > > Signed-off-by: Liu Ying > > > > --- > > > > .../display/bridge/nxp,imx93-pdfc.yaml | 78 > > > > +++++++++++++++++++ > > > > 1 file changed, 78 insertions(+) > > > > create mode 100644 > > > > Documentation/devicetree/bindings/display/bridge/nxp,imx93- > > > > pdfc.yaml > > > > > > > > diff --git > > > > a/Documentation/devicetree/bindings/display/bridge/nxp,imx93- > > > > pdfc.yaml > > > > b/Documentation/devicetree/bindings/display/bridge/nxp,imx93- > > > > pdfc.yaml > > > > new file mode 100644 > > > > index 000000000000..a84bfb46b01d > > > > --- /dev/null > > > > +++ > > > > b/Documentation/devicetree/bindings/display/bridge/nxp,imx93- > > > > pdfc.yaml > > > > @@ -0,0 +1,78 @@ > > > > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > > > > +%YAML 1.2 > > > > +--- > > > > +$id: > > > > https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevicetree.org%2Fschemas%2Fdisplay%2Fbridge%2Fnxp%2Cimx93-pdfc.yaml%23&data=05%7C01%7Cvictor.liu%40nxp.com%7C3e8db7ce3170451bc0e208db030a6ad0%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C638107115502467822%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=c%2BQ%2Bhpov6L9b905ozKPrkWiTzaRD3ZFsEh0urw5evsQ%3D&reserved=0 > > > > +$schema: > > > > https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevicetree.org%2Fmeta-schemas%2Fcore.yaml%23&data=05%7C01%7Cvictor.liu%40nxp.com%7C3e8db7ce3170451bc0e208db030a6ad0%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C638107115502467822%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=SkPZLJIR9uoqk4mRqSsfu963S%2Baa7xXmyCqzR36LJ30%3D&reserved=0 > > > > + > > > > +title: NXP i.MX93 Parallel Display Format Configuration > > > > + > > > > +maintainers: > > > > + - Liu Ying > > > > + > > > > +description: | > > > > + The i.MX93 mediamix blk-ctrl contains one DISPLAY_MUX > > > > register > > > > which > > > > + configures parallel display format by using the > > > > "PARALLEL_DISP_FORMAT" > > > > + field. > > > > + > > > > +properties: > > > > + compatible: > > > > + const: nxp,imx93-pdfc > > > > > > > > > Based on description, I have doubts this is a separate bridge > > > device. > > > Why this is not part of display driver/bindings? > > > > The relevant display controller in i.MX93 SoC is LCDIF. From > > hardware > > design PoV, the parallel display format configuration logic is not > > a > > part of LCDIF. Instead, it's a part of i.MX93 mediamix blk-ctrl. > > The > > blk-ctrl includes controls for miscellaneous devices with small > > logics, > > like this parallel display format configuration, LVDS Display > > Bridge(LDB, see fsl,ldb.yaml) and so on. The below pipeline > > describes > > data flow of a parallel display LCD panel: > > > > DRAM -> LCDIF -> parallel display format configuration -> LCD panel > > > > So, the parallel display format configuration appears to be a > > separate > > bridge. > > > > > > > > We do not create usually devices for single registers, because > > > they > > > are > > > not a devices. Devices are a bit more complex - have some pin > > > inputs/outputs, not a register only. Of course there are > > > exception, > > > but > > > this one does not look like one. > > > > IMHO, this one is a standalone device although it is controlled by > > one > > single register. It's input pins connect to LCDIF and output pins > > connect to i.MX93 SoC's pins/pads. > > Fair enough. It needs to be defined as part of the mediamix blkctrl > schema though. Do you mean that we can keep this schema and need to allow child devices in fsl,imx93-media-blk-ctrl.yaml? Cc'ing Peng. Peng, it appears that you are listed in the maintainers of fsl,imx93- media-blk-ctrl.yaml. I think it needs to be extended to allow child devices. Do you consider to do that? Regards, Liu Ying > > Rob _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel