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 B3670F3D60E for ; Sun, 29 Mar 2026 18:30:05 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id EDAE110E055; Sun, 29 Mar 2026 18:30:04 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=nabladev.com header.i=@nabladev.com header.b="Hn4DuNEE"; dkim-atps=neutral Received: from mx.nabladev.com (mx.nabladev.com [178.251.229.89]) by gabe.freedesktop.org (Postfix) with ESMTPS id 99EE410E03A for ; Sun, 29 Mar 2026 18:30:03 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 6DB00111DEF; Sun, 29 Mar 2026 20:29:56 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nabladev.com; s=dkim; t=1774809000; h=from:subject:date:message-id:to:cc:mime-version:content-type: content-transfer-encoding:content-language:in-reply-to:references; bh=OKLfPcrbiTzD/KA37po52kxMaLg/n3Rjd1MI3Z8MQH8=; b=Hn4DuNEE5QITrI1FkuQkivurMWTftugoayrXrgCCf1NMegARtQYHRjGDWnur04fo7hwZhZ bm1saP0oXCY4rKPfbhYNCx3Bi0daXYg4fWFjwpBJw4F5w29h5C/JYVu1zpxf6YucvyLzjE DwDI65ojZdpVU1elWnFzDTy26OMsWguV5uMO5HTYjaz7XvO7FdJ9ZeIEcd9yBdjFnLoWtA xI9qcE5RxwJwDbxpP1raTXg/kKjg+PUrX0cBiqoJDFK1y7Y7d6FtnIz8CEtYpVXxWOPSxX BhRcZ8QcTU7NWUsrtSUdDjwUg108xeC5B9uds9mJVQ4WE5BOS1lyTDMpXR9pWg== Message-ID: <0d7c7403-4b77-42f3-82d6-eaf2be8e5b1e@nabladev.com> Date: Sun, 29 Mar 2026 20:29:56 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] dt-bindings: display: bridge: ldb: Require reg property only for i.MX6SX/8MP LDBs To: Marco Felsch , Liu Ying 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> Content-Language: en-US From: Marek Vasut In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Last-TLS-Session-Version: TLSv1.3 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: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On 3/29/26 7:42 PM, Marco Felsch wrote: Hello Marco, > sorry for not writting back earlier, the last weeks were quite busy. Tell me about it ... > On 26-03-29, Liu Ying wrote: >> LDB's parent device could be a syscon which doesn't allow a reg property >> to be present in it's child devices, e.g., NXP i.MX93 Media blk-ctrl >> has a child device NXP i.MX93 Parallel Display Format Configuration(PDFC) >> without a reg property(LDB is also a child device of the Media blk-ctrl). >> To make the LDB schema be able to describe LDBs without the reg property >> like i.MX93 LDB, require the reg property only for i.MX6SX/8MP LDBs. > > NACK, we want to describe the HW and from HW PoV the LDB is and was > always part of a syscon. This is the case for all SoCs i.MX6SX/8MP/93. > >> Fixes: 8aa2f0ac08d3 ("dt-bindings: display: bridge: ldb: Add check for reg and reg-names") > > Therefore I would just revert this patch completely. Last time, I pointed out the hardware is part of syscon, but as a subnode and therefore with reg properties. What is the problem there ?