From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail11.truemail.it (mail11.truemail.it [217.194.8.81]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 460DC35E1D5; Sun, 13 Sep 2026 11:10:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.194.8.81 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789297832; cv=none; b=dxjTLNf+RrS9YrvecpdL0COCdMDeFrZMblbbjp2WTqvSiPaIOkvzZMk/e8nckYhVfQspggiUKDBDi0Zl4izbkgxFZLvcp4/5i2hWuwdhfobr7i7L9w/Zhn/m/J8/yBGIKSQetgD5WsDRE8h6/bJbYGIPL1uOnFJdazfPjrVceEA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789297832; c=relaxed/simple; bh=/riyfTF13ZDlr01z6yZ0QrhVTF38My+3SoFSPxrCyTk=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=JDZ7B3Y0G1jdwRR6q8zwVecOW2qUQAgq79F5DopdnfOcEAEOc5cZhxarhaDMXVjIgC4gWB1Wthx0y0RgodTBg0Xd0OXwzcdQIcM3gcY/poGktetJVakbBMrrQeeilnFRCtrfuT1zo9QYJXxTekuMyaBENZXikqTMs2kKJTk/rp4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=dolcini.it; spf=pass smtp.mailfrom=dolcini.it; dkim=pass (2048-bit key) header.d=dolcini.it header.i=@dolcini.it header.b=T0VFBHWp; arc=none smtp.client-ip=217.194.8.81 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=dolcini.it Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=dolcini.it Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=dolcini.it header.i=@dolcini.it header.b="T0VFBHWp" 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> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260813092836.38367-1-francesco@dolcini.it> + 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