From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from EUR05-AM6-obe.outbound.protection.outlook.com (mail-am6eur05on2084.outbound.protection.outlook.com [40.107.22.84]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 881C317758 for ; Tue, 22 Oct 2024 08:10:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.22.84 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729584634; cv=fail; b=lxj+bWyNl/S177/KFySGlJVXYaZnZWJ6v5nriDfSbjFi/nl9bOBPBeHDfIJXbe8bW5rLh+UcR5Ao99VYJsPMW8Xu2+Ml/Na+v6zT+AGXIIopDjypEAHI5jI0cpQdP3+hprbJJtaHqYjIe58KSp2EPTazPaIaDaCy3azEsKe5Sak= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729584634; c=relaxed/simple; bh=hoRmFJkZBP253y3ZxpmXM2ajWakTiIUz/dsJn3sw4kM=; h=Message-ID:Date:Subject:To:Cc:References:From:In-Reply-To: Content-Type:MIME-Version; b=d7xCMeZoqr3faUotNaw4vZ4xujlMwNo70+OT+rvlbcbIHEZyDGp6L8DMRpMI2rhSi4PYrorQvlQVC8xbL2ZYP5wo9RmagP1d8uaP9a/L4l29MO2dYC9MEORNX7v1BjXXhq+LBJAyjhImQYlRiRwSOBLHeRoAR3oVP2xj+RLEP6g= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=nxp.com; spf=pass smtp.mailfrom=nxp.com; dkim=pass (2048-bit key) header.d=nxp.com header.i=@nxp.com header.b=XXs1UNiY; arc=fail smtp.client-ip=40.107.22.84 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=nxp.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=nxp.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=nxp.com header.i=@nxp.com header.b="XXs1UNiY" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=yevszvDNeVJX4Hfhz421oKIYte8X7bGKqs0yydEyALo/Mwzd6RvOJM92CdChbHEAffgoJXilc7ZqhsOjVLTTyyXlbiT4pqk9jB/dcJca4J64uohe6+NqLX2LOjPG5hChbNqMwMhFUmVDoTpVrmiJrDm0Y4RYRCSr2rdLsGgh10uturAfWPBaIllQKn9fAHwQ6y0dSFcPRBE4GJOgrBULPwHgHBHN5wtcJR/1QyUH0JzXBkLwiSZmx07chaM8k9+W2AWNZtipt+SvLrYnCUDivHaWh2EETojnJqX10y8e3igA1s8K194sc7ELAcY1sZLQ1kaP+ahsNlJnGgO83Ltmyg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; 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=mBT7Yawja4t5KOzpO1HC8aPsQiOUdr1KXHnLoYiFhXE=; b=u+qwQiAWFtNfVNmZfyrIOqsBPxOIsM9a5bYrAsa+Ha9nUkW7RISGEYtDtjhy0JvZKpKhaDkv+uTUbEvgm8+0ZduOuDU4TOUgtMfxxveujtATcPtgU8W3uEJ9rIZFSWii5mSV/2GIPkwbu/W+9NsViAMoeQsBQs4st76dFumOzGrrv/HfwonKJ6QlHcUl4EuGUH9ssfefx3bY9p2dCbnkVHgPgvRoh2kr+8qJsZiwWmfI4iWTklV+61YDgSoc0Udzbu3CxTnH04OqNys3RrArjuwCCnc9J4PwTeNJHaFdPAH+j47t0d18nccYwnfqnlE1SlWIdeMPfZ6GHhpbVcoi3Q== 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=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=mBT7Yawja4t5KOzpO1HC8aPsQiOUdr1KXHnLoYiFhXE=; b=XXs1UNiYivtUZokx6nU3Y7inI9/D6vksx0WD24g4oFGZiacL7OaLhzUqgkxWaI8XVrR75WOkR5d6AdpwOmpZNIYMZIeynn9VP9sLs8rQ+zyoUhFdgAIsAp28ijmeaDGK/uVQld3nsz/XVMdwcPbcm6gia2LvN787Mk/lHHIlrwUDZioNhW1g7S8quz0JwcldqtI6+B3h04dQhKYrg2bC63dcTy2HooSmWKJiQL6sbXkEVt4/eySBMCMw4qbdewYuq7wVKvBaBjEhwZIJmLR9Ns97uP9f73CQjTth6VqiTgaxSyewVEp1eil59iXNZZ0xlMG0DcJx2ebSI+Q32fOvfQ== 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 AS5PR04MB10020.eurprd04.prod.outlook.com (2603:10a6:20b:682::17) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8069.28; Tue, 22 Oct 2024 08:10:28 +0000 Received: from AM7PR04MB7046.eurprd04.prod.outlook.com ([fe80::d1ce:ea15:6648:6f90]) by AM7PR04MB7046.eurprd04.prod.outlook.com ([fe80::d1ce:ea15:6648:6f90%4]) with mapi id 15.20.8069.027; Tue, 22 Oct 2024 08:10:28 +0000 Message-ID: <7a83230b-292c-4e28-813d-a07ea1b6a66a@nxp.com> Date: Tue, 22 Oct 2024 16:10:51 +0800 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 12/15] drm/bridge: Add ITE IT6263 LVDS to HDMI converter To: Maxime Ripard Cc: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, andrzej.hajda@intel.com, neil.armstrong@linaro.org, rfoss@kernel.org, Laurent.pinchart@ideasonboard.com, jonas@kwiboo.se, jernej.skrabec@gmail.com, airlied@gmail.com, simona@ffwll.ch, maarten.lankhorst@linux.intel.com, tzimmermann@suse.de, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, quic_jesszhan@quicinc.com, mchehab@kernel.org, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, catalin.marinas@arm.com, will@kernel.org, sakari.ailus@linux.intel.com, hverkuil@xs4all.nl, tomi.valkeinen@ideasonboard.com, quic_bjorande@quicinc.com, geert+renesas@glider.be, dmitry.baryshkov@linaro.org, arnd@arndb.de, nfraprado@collabora.com, thierry.reding@gmail.com, prabhakar.mahadev-lad.rj@bp.renesas.com, sam@ravnborg.org, marex@denx.de, biju.das.jz@bp.renesas.com References: <20241021064446.263619-1-victor.liu@nxp.com> <20241021064446.263619-13-victor.liu@nxp.com> <20241021-thick-cockle-of-popularity-c5e28c@houat> <889594b9-e6cb-4d90-b959-cd0258b2f166@nxp.com> <20241022-wondrous-fractal-lion-aedcd9@houat> From: Liu Ying Content-Language: en-US In-Reply-To: <20241022-wondrous-fractal-lion-aedcd9@houat> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-ClientProxiedBy: SI2P153CA0026.APCP153.PROD.OUTLOOK.COM (2603:1096:4:190::18) To AM7PR04MB7046.eurprd04.prod.outlook.com (2603:10a6:20b:113::22) Precedence: bulk X-Mailing-List: imx@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AM7PR04MB7046:EE_|AS5PR04MB10020:EE_ X-MS-Office365-Filtering-Correlation-Id: 554f082c-6558-4521-f682-08dcf270fd85 X-LD-Processed: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635,ExtAddr X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|1800799024|366016|376014; X-Microsoft-Antispam-Message-Info: =?utf-8?B?cnZqTGR3Q3dkRE1qaWVzNEovTVozRUcwaUZLSkF0UVZhemZSb1o4elRPQ0F1?= =?utf-8?B?TkRVN0d6TnNiMTc5OEFoa2JZOEVBbjdJeTNabUVwdGFqYnp6ZWlZekl2bWV0?= =?utf-8?B?c0xPa255WVZXYTVJZnJBS20zbDNMVE1TZkNnUUpSWU5La0p4dlZicnlnM29F?= =?utf-8?B?KzRlb3R6aE11OEZyZjRaY3E3WHJYdnVQaWtGb2hIanhWWUVFQjZ3eXdHdDNV?= =?utf-8?B?aU9uT1Q4MmtBbDJ1ZjQxT051eHJidTIyUDhVM0Z2ejErZkhmM1Z2MnJaMmto?= =?utf-8?B?S1RuQUE4a0RWSUlXZHMvK1VDNmEvM2pzcFRJazJtVVpMMVI0SXZaNytMb1dZ?= =?utf-8?B?MW5nRHlyNnEwV1RQU2NEaFRzWndSZHcxQlRrWEZ1bDlZZWRkNS9IUERCUU5G?= =?utf-8?B?b1hrMHMwanpFTG1CVFJua1d2SCtPTXozL2pTcFBrVVVlejlmSmgvQlNyaVV5?= =?utf-8?B?b1QwMDBib0dDeU8yR2JGL1lmNENmQVhtODk4Q3dPWkkrZkREbHRRcU1tNG5M?= =?utf-8?B?QmpPc1ZFbGpSU1RqVXhqVElKKzhRRWZFajVBVGQ3RE00QUFFUmNpWVhkLzcx?= =?utf-8?B?dmZMM0JxTjVnNjViN2N2ckQweGpRSy94cml3UDY1ZEE0N2diNmcvaDBya05B?= =?utf-8?B?UHVlM1FPSmFmVmJzMmhsaFFhRThXUU5YcmVWMlcyaUl4bTlMdTVLM2JhVnJ0?= =?utf-8?B?Y2sxTVkwY3hYTW5DUko0WWhZaENGYS8ycEFHZ2U1UVBEY1NLeEdQblpudW9V?= =?utf-8?B?MUs5MHVUMTZ2Q3NRT0lCMU93Y0t5cDBNR1dNWldUd3dETmpLS0hIcEhrUWJK?= =?utf-8?B?VG40bXdSbTA4NVdkc0d6TzA1UldISFVsaHFrMkdBY0NsdXo3azdCSUJoTVlD?= =?utf-8?B?djUrclMxTlVrL05sSjVNalpjZU1xYXNIbCtHQVpGRHF3WXdPaTZhRXI3Y0E5?= =?utf-8?B?enVLWnY3Q3JjeXJtU0FnbVgxTFBTQnl1Qmd0RWgxbG0xcHhaN0ZQaVlqRW5F?= =?utf-8?B?aVd0VkJaVkpBdGNQaFBvU052UE13OTFzVjMyWXlSRmlCMFIvTlQ0SVlnR2ht?= =?utf-8?B?akxoSjBvWHBWN3lGYmVINXExWjlpdC9UbTZJZE1zNWhTRUlBZkgxQXJVRDk3?= =?utf-8?B?Rk1CczdPem9CUmN5V2Y2VTdKZVcyM0dmRzVES2FDd3JPRnJhdGNvRlczRTN5?= =?utf-8?B?a0h6UUM1N05hVXd0dkNzS3B2MnNFLzhjaVk3MzVabUFPeTVkSTJ4WmMvcTh6?= =?utf-8?B?RnpXeXNQRTAyTXhoY1JxTnFWU3pSc0oyMWU3d0ZhK0RBbDBuak1RY1hiMURJ?= =?utf-8?B?ZDJIR3VzYU9pRmF6VkV5Qm85QVJzOVM0MmxXbGg2SHJwK0ZqQWZXc1RKTzJh?= =?utf-8?B?RjhZRlY1V1J2WDRQNFZ4MHd0bnBmNDdwc0lMYUR5enJYU09oSGdYVmJqZUhp?= =?utf-8?B?SVZUUW5yK3l4MGxXVEdJYUg2dE1mbjVjNHI3aE9yWlFKVHVIUXJXTFhsM1dz?= =?utf-8?B?eTBDSytoOWl3WmpyejZSa1NIZm1Hc0lSMkMwVnQyZEJKRmEwSDd2Nm9YQWRk?= =?utf-8?B?b1g3ME9xSDhwaUYwZlRMSDVFNHVSN0c1TlEwVVRTemlMck1EdTh4TUJPb3VJ?= =?utf-8?B?SlFCcmFkZ3V3RksvRzFlWmQrM3NxbStHWE9pTWwwSFowSjdUQk00L0RhRXZl?= =?utf-8?B?WCtRSDJlbEZkQzNRZGp5andGeDhZdzFSdFJvL0JreGVZcWxrVG4rQ0Myb2ZK?= =?utf-8?Q?i2tIkvssAjEKfB5l0zSWGTqWrXqq6pHb7EYAEVW?= 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:(13230040)(7416014)(1800799024)(366016)(376014);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?UzJRZ3NMNDBrWEo2blNEcm5DelFVQ1JUdGRWM2NpLzFXVDJvSVQ2M3JkUnBx?= =?utf-8?B?cjFZRVFjQVlzZzd4WmJiS2Nvald1QmJtYWNacm55MkZJMmhZelBocnpCd1h0?= =?utf-8?B?NnFORXVYNFl4dDBvWUIwZFdBQy8ydGdIbGlMM1Y2ZXJrZHo5VzRLemNiKy94?= =?utf-8?B?TlFPVGhTUmlTM1pQYU9HMlpSWEdJN1FFQ1A4WVJ5TDBWM1hCV3hnaTVIZzRV?= =?utf-8?B?UzFyM1VTSXNTb1RDMkFnMUZsZGg0SFdaem1Wc2JaSFBPSitKUHpocmxBVTBR?= =?utf-8?B?MVJjc0pLaDFqSnZ1aFB4UkpCb0RmbFBkK0QxMGdHNWhUbjlvSlNKVkNFekUv?= =?utf-8?B?aXFwd2RQd1NSOHlmVTRFRXNlbFpaa0U0Q2ZJTU9hc3VndkJXdFBtMVVMMmR3?= =?utf-8?B?Tk5XRzh6U2dJdzBmL081U24vZFhFWXpoalN3ZU9ucDArekI1MytjdWFzQUVL?= =?utf-8?B?c2xxcVpzRmJOMm4vVjVHOXowZ0pvbk9La1JqanlqSEQya3Rxb0tVRG9FUUNn?= =?utf-8?B?WmdDUEk0UkUrY1FFTVByd0xYTjdUZml6N3R3WVBUanhNODlBcUovU2ZVTGNH?= =?utf-8?B?dGl1NGplVGdMaHVMVEc2RThQNzZGQ3BvdU1QRzZHVWp2OXlWUEhDVU1iYzV0?= =?utf-8?B?eDhucmV6UmtHZjk3eWxkbUZzQ2dZVkxJaTgxQmtvL0FWdzBIamJHK3dHellw?= =?utf-8?B?aklVcUNkZ0wwYTJWekI3QWJPbXl1SjFkOWlpTHNsSlNmUVhEZUZkT29KTnRX?= =?utf-8?B?YnlzSFZxQkhyS00rQVlEYm5aMXFSelJKK2RMZU9Cd2FnbmdIK1ZYQmkvSC9L?= =?utf-8?B?OHZFN3IyUW5TMDF2RVlTakVlMmFka0tTOTlFVWhiRi9yQllIR1liNG9jMTlJ?= =?utf-8?B?SXdNMDRYdndjektXZ0tKYytIQm4raTh0ZFBJWUhqVEd6dGIxanpTVlZxZlda?= =?utf-8?B?VEVGMWttMnVZcWFlWHlqU1E1ZWRyVkNSdHdPeDJPMWNvL3lzZFE0L1JRRyth?= =?utf-8?B?WFpmbW50OTRQdk9saVBLazM4WE1oNkdoYjFsZm40YXVzKzlkMHJ3Rit0UjV5?= =?utf-8?B?cEdOK2dBQVpiVTNKanhoVURtaSs5c3dwWWJlN1ZEZ2tzNG5jR0lKdXJydXAy?= =?utf-8?B?M0ppcGwyY1hpWDl5SUMxeXlXMUY0NTlGK1Y2N1Rnc0g2VWszR1hlYmtIaHdM?= =?utf-8?B?L28zRVJsVno2Y0I5WlF1di81OHNmaDBQVFozMk1UME5UNVBVME0ycXpVaHpX?= =?utf-8?B?WmNZOFI2Vy9lc0hCNHlnWjljcGwvaW01OSt1WGNGRkwxbUkzSjdOcnlydHoy?= =?utf-8?B?K21wQUQwWkhxR1YxbGVGR2JIYi9nUkRTM0l1VmxubUFsVyszd0lxam1TV2xy?= =?utf-8?B?TldGQit0dk54c21Dd3VPR3dsajN3Zk9adjA5SkZyNjhYVE5MWEVqTW9qQ3NI?= =?utf-8?B?MVBPeHgwaWMxalFBWVptaG5IeXJMUVlRS1RXZHc0WHRyY0lvK3hESkN4dW9S?= =?utf-8?B?WGEzVVhocnBYelNldTk5N2FVRFVSb2dhbll2YjJuN2sxRHV4VWhPRGxUeDVM?= =?utf-8?B?OFJLdXBCUFc2RXYwRWlweEI2aW14djl1Z0xrR2U2dFZRR1hENlhmYnlNQmFQ?= =?utf-8?B?MTVsNDE0L2hhTldmRUlPQkY5S2hkZ2RBenZIVmdrNlZGZ2U1RjFiclZwbnFu?= =?utf-8?B?NUJMK21FalZNM2RlZ3FyVjM2SUZ3aVN5YXk3S1dFcVZaekJzQWlXWFlsbFlL?= =?utf-8?B?dkRoU0h3RlJUbXVZUEg1TG0xUk9Vc05SbytVbVYrdm9NV2c5cHhJZVBrdE1h?= =?utf-8?B?QUZwcHNKZWNkQXIrUXNnOHFQVFR2dERzcjZhbUMzSlJqWGszb0FKVXcyWmFZ?= =?utf-8?B?c0Npa05zTzYra1VjQ1pwK0htUWU4NDhhRU5JZWZNcHBUaXlxc0VTblQrbm16?= =?utf-8?B?MmdrMlgxaTFxZXNVNmdJRVA4V0lydTQvZnRuNk9HbXdvcDlYSlVMQVdUNmtx?= =?utf-8?B?N0V5SjBacEI5NGw2V1lpY3ozNnI0OFkvS2lPRU0ySG9tSXNCQXZCUEFsenY3?= =?utf-8?B?Mmt0UnVOd2ZEMTd0V05QVkd6eW5uUlEybVA5L2cxUXNUWnhSeEpudSt6YmhN?= =?utf-8?Q?S6C+npMWG4rb4JPjlu7rtIhhp?= X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 554f082c-6558-4521-f682-08dcf270fd85 X-MS-Exchange-CrossTenant-AuthSource: AM7PR04MB7046.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Oct 2024 08:10:28.4710 (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: zjw0fIC7SsyR6zSy607sBDxCQ5lSJbe+2vEiKmb7LcUgVtyV51GxN+prlm9EGy+yTVycOOfyOuQsxj2rE3Fnwg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: AS5PR04MB10020 Hi Maxime, On 10/22/2024, Maxime Ripard wrote: > On Tue, Oct 22, 2024 at 03:36:47PM +0800, Liu Ying wrote: >> Hi Maxime, >> >> On 10/21/2024, Maxime Ripard wrote: >>> On Mon, Oct 21, 2024 at 02:44:43PM +0800, Liu Ying wrote: >>>> +static int it6263_bridge_atomic_check(struct drm_bridge *bridge, >>>> + struct drm_bridge_state *bridge_state, >>>> + struct drm_crtc_state *crtc_state, >>>> + struct drm_connector_state *conn_state) >>>> +{ >>>> + struct drm_display_mode *mode = &crtc_state->adjusted_mode; >>>> + int ret; >>>> + >>>> + ret = drm_atomic_helper_connector_hdmi_check(conn_state->connector, >>>> + conn_state->state); >>>> + if (ret) >>>> + return ret; >>>> + >>>> + return mode->clock > MAX_PIXEL_CLOCK_KHZ ? -EINVAL : 0; >>> >>> drm_atomic_helper_connector_hdmi_check will already make that check, so >>> it's redundant. >> >> MAX_PIXEL_CLOCK_KHZ is 150MHz. With 150MHz pixel clock rate, we'll get >> 150MHz HDMI character rate for 8bpc and 187.5MHz HDMI character rate >> for 10bpc, both are lower than MAX_HDMI_TMDS_CHAR_RATE_HZ = 225MHz. > > I guess? I have no idea how that's relevant though. Where are those > constraints coming from, and why aren't you checking for them in > tmds_char_rate_valid? All constraints come from IT6263 data sheet. They are also mentioned in IT6263 product link(commit message contains the link). https://www.ite.com.tw/en/product/cate1/IT6263 " LVDS RX Support input clock rate up to 150 MHz HDMI TX Support link speeds of up to 2.25 Gbps (link clock rate of 225 MHz) " If no objection, I'll check mode clock rate against MAX_PIXEL_CLOCK_KHZ in tmds_char_rate_valid. > >> So, it looks like pixel clock rate is the bottleneck. > > The bottleneck to what? To the IT6263 video processing throughput capability. > >> Remove drm_atomic_helper_connector_hdmi_check() or keep this as-is? > > No, like I said, remove the final check for mode->clock. > > Maxime -- Regards, Liu Ying