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 X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6BE5BC433E7 for ; Sat, 10 Oct 2020 00:00:59 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 0FE5C221FD for ; Sat, 10 Oct 2020 00:00:59 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="n111F4ur"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="AsJihnaG" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0FE5C221FD Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ideasonboard.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References:Message-ID: Subject: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=VPh2tWpmmdJnqfUF7mbvppaYtN7u53XJuEKxg8v8UUw=; b=n111F4urloFI6dvDZXJQfFGwZ fVCup3zKjjx7GNIAvukXb2lGGKrQlMw1dzEadX9XSVlJYosRYkU1jeNVR1BQdbwRdcLiWRzGECJ3E o0aaZnYq3QGHCAhVWyDvXiTHpyKp26wI1GLrWtwU4hb5qIfORqbHCLclP1wDv/1Rc26h27W2Iunau FrZk/ysgpTode8LoDrDi0woexy5bxSYFl+xwVEeERF8z5RXkgUXZpdVoDwhlBrkFQbyDv+Ev6hYzX mVUyKQaYsiII8kz4fMLMFjtralTVt66jEVsZvXkIFIpkf64ixvQ/xmncTzkok+AjyUp5aQOPL/95n 0CYw4z08g==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kR2IN-0006aA-IX; Fri, 09 Oct 2020 23:59:31 +0000 Received: from perceval.ideasonboard.com ([2001:4b98:dc2:55:216:3eff:fef7:d647]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kR2IL-0006Zk-QO for linux-arm-kernel@lists.infradead.org; Fri, 09 Oct 2020 23:59:30 +0000 Received: from pendragon.ideasonboard.com (62-78-145-57.bb.dnainternet.fi [62.78.145.57]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 7BB2E528; Sat, 10 Oct 2020 01:59:27 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1602287967; bh=hQoSfHq4w68Q8YI1olTrIlcr8qpEmfR2zY8Trc10LPQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=AsJihnaGYD4EMaCzVQqF4DINZ64tw+G+q3wq70IU/ZmJ1uUpGVFszJS7uphcJQMqa wV1hAmWrF4dNnbBgkNgeKkARaIoBsI4oUlvDWlrbDnL0YMZs8XldaGim+Ekm/reGxs /Ai5vx69tPuw2kfzG25e6Ufgw6rY6V5OVAf+a5vk= Date: Sat, 10 Oct 2020 02:58:43 +0300 From: Laurent Pinchart To: Marek Vasut Subject: Re: [PATCH v2 3/7] dt-bindings: display: mxsfb: Add a bus-width endpoint property Message-ID: <20201009235843.GR25040@pendragon.ideasonboard.com> References: <20201007012438.27970-1-laurent.pinchart@ideasonboard.com> <20201007012438.27970-4-laurent.pinchart@ideasonboard.com> <7b8df7af-5ca8-708b-4975-2fdf4280116f@denx.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <7b8df7af-5ca8-708b-4975-2fdf4280116f@denx.de> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201009_195929_974752_DDC64594 X-CRM114-Status: GOOD ( 17.05 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Guido =?utf-8?Q?G=C3=BCnther?= , Stefan Agner , Rob Herring , dri-devel@lists.freedesktop.org, Pengutronix Kernel Team , linux-arm-kernel@lists.infradead.org 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 Hi Marek, On Wed, Oct 07, 2020 at 10:40:26AM +0200, Marek Vasut wrote: > On 10/7/20 3:24 AM, Laurent Pinchart wrote: > > [...] > > > + bus-width: > > + enum: [16, 18, 24] > > + description: | > > + The output bus width. This value overrides the configuration > > + derived from the connected device (encoder or panel). It should > > + only be specified when PCB routing of the data signals require a > > + different bus width on the LCDIF and the connected device. For > > + instance, when a 18-bit RGB panel has its R[5:0], G[5:0] and > > + B[5:0] signals connected to LCD_DATA[7:2], LCD_DATA[15:10] and > > + LCD_DATA[23:18] instead of LCD_DATA[5:0], LCD_DATA[11:6] and > > + LCD_DATA[17:12], bus-width should be set to 24. > > The iMX6 IPUv3 uses interface-pix-fmt which is a bit more flexible, but > I'm not sure whether it's the right way to go about this, see: > Documentation/devicetree/bindings/display/imx/fsl-imx-drm.txt I think specifying the bus with is better. It's a standard property, but more than that, a given bus width can carry different formats. For instance, a 24-bus could carry RGB666 data (with dithering for the LSBs). -- Regards, Laurent Pinchart _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel