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 226EFC88E5A for ; Sun, 13 Sep 2026 11:10:51 +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:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=y44+A28Y3BNV9Kwrp3SpasZ4quyu/gVpv3kXvPsZ3r4=; b=kZl3vX1ke2t0Vgeh1NuCekGxBl 6bWvvR/roNaVewSdrSkegF3ZIKJBKErU4B7cw5eOCfGicBm96ioqjlBRAQTZXEoaIDJ9Cdp44Odq0 /dNYPLZ2nHWVLN3c/ThFIe0o6/yJ7c7WbIpZfLwOGzF/+ecXkhG0207YLdtURziQAeURmIAPUkK/g PFOzAKIycnTDX0YSaSiXS+lNgpHce7fPej3PzMw5xrFSrJ4FEUO+Vdavl8qw+c4AsvgV2M5D21Wq2 wWhvBQ+KH3pofJyYSWfLZV+jxj+phuwzqlDKDrK6jT6yD24b/U7Vc9wQd/bx7W1t7tnpa/8+ialfw mKofwutA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x5i6Z-00000001cBJ-0M9Y; Sun, 13 Sep 2026 11:10:40 +0000 Received: from mail11.truemail.it ([217.194.8.81]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1x5i6V-00000001cAw-0qbB for linux-arm-kernel@lists.infradead.org; Sun, 13 Sep 2026 11:10:36 +0000 Received: from gaggiata.pivistrello.it (93-49-2-63.ip317.fastwebnet.it [93.49.2.63]) by mail11.truemail.it (Postfix) with ESMTPA id E7E5B1FB90; Sun, 13 Sep 2026 13:10:27 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=dolcini.it; s=default; t=1789297828; bh=y44+A28Y3BNV9Kwrp3SpasZ4quyu/gVpv3kXvPsZ3r4=; h=Received:Received:From:To:Subject; b=T0VFBHWpT29SQ0+mCZ1RszeeutgP4OtMHS6BpRswhxVHUsxyKJAOjzTDWzV5t31Cj oMLwjimg1hEn9U5xEb6VE/5ryXcEuMq4KyehetNnTRjvZU29KcvxJTm05LFMX8IWTR jRFoEtP7vyDg4H+Be43YTOgQ+urDJEKOKh6Hjc4axSKzT16YQem3WuuAC/T+376yy5 kuzu1QqNEvu+tNuvnVR13VcfqMdLn0rfP4jh8DfwtbQFVr//MEqZbDoehLRlcxsCMH tKbzxXunpmTKf3feVGyZ06Lt2p7XppYDszP849m/ZlFDzpWyGoFD0iMct6eQgtdG/c +VcqUgXh0btkQ== Received: from livingston (unknown [192.168.42.11]) by gaggiata.pivistrello.it (Postfix) with ESMTP id 81B107FA3F; Sun, 13 Sep 2026 13:10:27 +0200 (CEST) Received: from pivi by livingston with local (Exim 4.98.2) (envelope-from ) id 1x5i6N-000000002jM-1jMz; Sun, 13 Sep 2026 13:10:27 +0200 Date: Sun, 13 Sep 2026 13:10:27 +0200 From: Francesco Dolcini To: Francesco Dolcini Cc: Marek Vasut , Stefan Agner , David Airlie , Simona Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Frank Li , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Francesco Dolcini , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Luca Ceresoli , Andrzej Hajda , Neil Armstrong , Robert Foss Subject: Re: [PATCH v4 0/4] drm: mxsfb: Support LCDIF interface bus width Message-ID: References: <20260813092836.38367-1-francesco@dolcini.it> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260813092836.38367-1-francesco@dolcini.it> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260913_041035_426245_09EFD903 X-CRM114-Status: GOOD ( 16.02 ) 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 + some more DRM maintainers/reviewers Hello, just a gentle ping to the DRM bridge maintainers. On Thu, Aug 13, 2026 at 11:28:30AM +0200, Francesco Dolcini wrote: > From: Francesco Dolcini > > The width of the physical LCDIF output bus can differ from the input bus > format advertised by the downstream panel or bridge. > > Such a distinction is required when the LCDIF bus width does not match the > width of the downstream display interface. For example, an 18-bit or > 16-bit LCDIF bus can drive a 24-bit display by wiring the available color > bits to the appropriate display inputs. Configuring LCDIF solely from the > display's 24-bit format in this case selects the wrong LCD_DATABUS_WIDTH > mode, changing the color-bit assignment on the LCD_DATA pins and resulting > in incorrect colors. > > Use the common OF graph endpoint bus-width property to describe the width > of the physical LCDIF output bus. Make the mxsfb driver derive the > corresponding media bus format from this property and use it in preference > to the format reported by the downstream display. When the property is > absent, the existing behavior is preserved. > > Set the endpoint bus width for the Colibri iMX6ULL and Colibri iMX7 boards, > which route an 18-bit LCD interface. The first two patches in this series should go through drm-misc-next. Please let me know if any changes are still needed. Otherwise, could they be picked up? Thanks, Francesco