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 98190D116FE for ; Tue, 2 Dec 2025 09:43:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Subject:Cc:To: From:Date:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=/nc88QLJ8slhOZGqyb1L1tn4ejxMI+zK58HeNRPD/E8=; b=Gw+exbKS5DWRAJkW1Pz0jivFTV Cm/SlL/H1tp6Y4xA4w9DjmaPmnNqkoLZ00zaTA3G/yEZWKVaFH18PDLNnZFIb1Dzq575/+oizCKtg Pabf4oh8LihWKQ8RUbkWZ7fp9xjqlZziWcRZu9oV5XJHVM7ipl203dc1GLJxQ3Sk5V8YR7wxvyB9A 9+rEcJCBW9WuloEey0AYtWJh4P72gePVUZnuVR5jKZN6bRa0bxvYcYGDf7vAXnA5/+7dazimDoTG0 0L/XAW0PlX9bikYNgz8ss69KR+czUu9hGe4RPwOgKQRh7qSjfRdf5L/WwoeIfzzC+R8KV3u6GAvg7 3bfJnkkQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vQMuW-00000005Aml-0BGi; Tue, 02 Dec 2025 09:43:04 +0000 Received: from smtpout-04.galae.net ([185.171.202.116]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vQMuS-00000005AlV-27Sp for linux-arm-kernel@lists.infradead.org; Tue, 02 Dec 2025 09:43:02 +0000 Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-04.galae.net (Postfix) with ESMTPS id B07C4C17B73; Tue, 2 Dec 2025 09:42:32 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id AB700606D3; Tue, 2 Dec 2025 09:42:55 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 4D1331191926E; Tue, 2 Dec 2025 10:42:47 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1764668574; h=from:subject:date:message-id:to:cc:mime-version:content-type: content-transfer-encoding:in-reply-to:references; bh=/nc88QLJ8slhOZGqyb1L1tn4ejxMI+zK58HeNRPD/E8=; b=luL3/4bRTXFIbWvIwBfEed7pUNN7/ssl5FuJjKODqCSo0tPivEZGF1V67Il+A3Yd++cPeJ Jg5//gi3Ff8QjsPmqcFnotj76TblUPueFxRUHphX9oUzyKB9ZZUrZZGbT1e1nFtP0xekaW AFgZ38nzpFtzQAkeV1fXucv8UCauxYzWUU7su/NPjHnJ+8roc8d5sgNU1PFSfsjqo3rh7x SXYFaEH2FuArbM3b7RLuJEth00k8dflo6mbYRHtWTxTjcmoMJsTk3YP3kJKz3eGJYj2xb0 x4UxIxtk4gMViAXbvOLITkaZveVuMCf8XG/yPhAsbtC9Gk6tWmkpwLUYBaOBCg== Date: Tue, 2 Dec 2025 10:42:44 +0100 From: Kory Maincent To: Krzysztof Kozlowski Cc: Tomi Valkeinen , Markus Schneider-Pargmann , Luca Ceresoli , Louis Chauvet , Thomas Petazzoni , Miguel Gazquez , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-omap@vger.kernel.org, Jyri Sarha , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Russell King , Bartosz Golaszewski , Tony Lindgren , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec Subject: Re: [PATCH 05/21] ARM: dts: omap: Bind panel to panel-dpi instead of ti,tilcdc,panel driver Message-ID: <20251202104244.59a9e83d@kmaincent-XPS-13-7390> In-Reply-To: <3bc5bf92-05c3-4841-ab28-9bab2bb31cd5@kernel.org> References: <20251126-feature_tilcdc-v1-0-49b9ef2e3aa0@bootlin.com> <20251126-feature_tilcdc-v1-5-49b9ef2e3aa0@bootlin.com> <96b1b7bf-ddbe-4213-a201-dc89cf2998dd@ideasonboard.com> <3bc5bf92-05c3-4841-ab28-9bab2bb31cd5@kernel.org> Organization: bootlin X-Mailer: Claws Mail 4.2.0 (GTK 3.24.41; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Last-TLS-Session-Version: TLSv1.3 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251202_014300_700776_15EE4EA9 X-CRM114-Status: GOOD ( 21.82 ) 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, 1 Dec 2025 22:46:01 +0100 Krzysztof Kozlowski wrote: > On 01/12/2025 15:13, Tomi Valkeinen wrote: > > Hi Kory, > >=20 > > On 26/11/2025 19:35, Kory Maincent (TI.com) wrote: =20 > >> Use panel-dpi driver instead of the deprecated tilcdc-panel driver in > >> preparation for removing the tilcdc-panel driver and binding. > >> > >> Signed-off-by: Kory Maincent (TI.com) > >> --- > >> > >> This patch is not tested. It would be nice if someone with one of this > >> board could test and validate it. > >> --- > >> arch/arm/boot/dts/ti/davinci/da850-evm.dts | 26 > >> +++++++++++++------------- arch/arm/boot/dts/ti/omap/am335x-guardian.d= ts | > >> 25 +++++++++---------------- arch/arm/boot/dts/ti/omap/am335x-pdu001.d= ts > >> | 21 ++++++++++----------- arch/arm/boot/dts/ti/omap/am335x-pepper.dts= | > >> 22 +++++++++++----------- arch/arm/boot/dts/ti/omap/am335x-sbc-t335.dt= s | > >> 25 +++++++++++++------------ arch/arm/boot/dts/ti/omap/am335x-sl50.dts > >> | 25 ++++++++++++------------- 6 files changed, 68 insertions(+), 76 > >> deletions(-)=20 > >=20 > > Doesn't this, or rather the following patches, break DTB compatibility > > with all the above boards? =20 Yes, I know this but I still wanted to try and begin a discussion on this, = as I really thought it is not a good idea to add and maintain an new non-standard panel driver solely for this tilcdc panel binding. I have gathered more arguments on this topic on next patch.=20 =20 > Stuffing DTS change in the middle of the driver change tries to hide > impact, which is not nice on its own. As it needs driver change before the removal for not breaking things it can= 't be done at the beginning of the series. Regards, --=20 K=C3=B6ry Maincent, Bootlin Embedded Linux and kernel engineering https://bootlin.com