From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=217.194.8.81 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793018616; b=ksHblVb/UYIbzoQCobiMM520EapQc0FU/h5a3idiDQzd400VGyBgChJq9N9W+1UjI0uI Tof5lml+YASM6ah6gOF/zcs0Hegil8qSn6krW6B9qOu7oz4uT3sncy0eWfm8so//R3u45 s3l1EobK5TBaHzluC6ZdcUL1mKdHmzjsDetbRLvPEK/jZzXSMBbHIZxEg9TY3+RQT4Btc /XmmfhXztAPoOoplDFfDeut3dYqA6bYaZ/sBbmd/k8DXAn1mXN8EZx7lIwj3mXaOgTrEu 8+taQSTdEdo7DUTPvrZ2da9RXR4wmD9a8JsFk/VNCbrqdHidZdjAkJhVRHI9FUjjpAQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793018616; h=DMARC-Filter:Received:DKIM-Signature:Date:From:To:Cc:Subject: Message-ID:References:MIME-Version:Content-Type:Content-Disposition: In-Reply-To; bh=8Jq41rEZlW8dpYSa9haaT2V6LwzTgLLlt9p+Cr4IhUw=; b=uPXiewQWiywy5huY3VHAQBGcE+hqCK+dzu66wwGe+tv4lM6xmY4wsVaSCuLMlAimoY3q cwQ9wXNKd3EzRkohjW1bxOQ5+qbhbYs3icEsovY7KMtQV7hOlSvNnDH/ks88geyrfYfMW v73MCuXQdexm8ASHVcjYMgj0VEpRAihacJFCIFewBbnZM3QzwF9tazmwS83CUtx1iYSRj vryBdINamy6McdXshojLnZ9oicCIHoiUcJ3FVoaJIF6JCqDTF4ekpTvLu42j4I4yS+aNS Bdq1V964lB8vv3+9hkx/ZM1Ml2xfVEDjo5IIpdwKvfSW2nWfyPbryvw7DCqR8P0FJgA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=dolcini.it; spf=pass smtp.mailfrom=dolcini.it; dkim=pass header.d=dolcini.it header.i=@dolcini.it header.a=rsa-sha256 header.s=default header.b=c0j25kco; arc=none smtp.remote-ip=217.194.8.81 Received: from mail11.truemail.it (mail11.truemail.it [217.194.8.81]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6CF4E606A31B; Mon, 26 Oct 2026 12:43:35 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 6CF4E606A31B 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, unprotected) header.d=dolcini.it header.i=@dolcini.it header.a=rsa-sha256 header.s=default header.b=c0j25kco Received: from francesco-nb (248.201.173.83.static.wline.lns.sme.cust.swisscom.ch [83.173.201.248]) by mail11.truemail.it (Postfix) with ESMTPA id C19941F973; Mon, 26 Oct 2026 13:43:31 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=dolcini.it; s=default; t=1793018612; bh=8Jq41rEZlW8dpYSa9haaT2V6LwzTgLLlt9p+Cr4IhUw=; h=From:To:Subject; b=c0j25kcozqWxHZK8k4lBZiOqMKsEnvOVVj0qHrqrR5JU1hPOJdPXOnBp59eFFHruV 7xPUxXwmDCu4kK4gP0UOBk0fNhZop+bAQKW6xBjFmAsIWAXfguyWbP/hYY9cKcb/oA jo6AqaoPi3wOtfZh2E9jY4j6/jBdwqEEAjBHhW07kuoP5L2zA2Jr2bCN6pbpmvv/8V vzt0BgOaUCSuqefPmlAOG/DIhcDrqoM27vAJecaG4SjGUW8EhswlMYUVhfHY+48mys yylU3vezcoKyrdCeUbqQ6Z6NeLulsM+7faYDOB4wt0RZffywk8+1CYXGilqIJQV2GB T4scWNfIGgZGA== Date: Mon, 26 Oct 2026 13:43:28 +0100 From: Francesco Dolcini To: Leonardo Costa Cc: Frank Li , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Luca Ceresoli , 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 , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, Leonardo Costa Subject: Re: [PATCH v2 3/3] ARM: dts: imx6q-apalis: Add VGA overlay Message-ID: <20261026124328.GA82443@francesco-nb> References: <20261019-v2-apalis-imx6-enable-vga-v2-0-ef6a3a780472@toradex.com> <20261019-v2-apalis-imx6-enable-vga-v2-3-ef6a3a780472@toradex.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Mon, Oct 26, 2026 at 09:25:20AM -0300, Leonardo Costa wrote: > Hi Frank, > > On Tue, Oct 20, 2026 at 11:01:30AM -0500, Frank Li wrote: > > On Tue, Oct 20, 2026 at 07:33:10AM -0300, Leonardo Costa wrote: > > > On Mon, Oct 19, 2026 at 02:37:41PM -0500, Frank Li wrote: > > > > On Mon, Oct 19, 2026 at 07:17:16AM -0300, Leonardo Costa wrote: > > > > > From: Leonardo Costa > > > > > > > > > > Add a device tree overlay for the VGA output available on the Apalis > > > > > Evaluation Board, which is driven from a parallel RGB interface passing > > > > > through a non-programmable video DAC to a VGA connector, without VESA > > > > > DDC I2C signals. > > > > > > > > > > The non-programmable video DAC consists of a simple resistor ladder that > > > > > converts the digital 16-bit RGB signal to VGA. The VGA output is gated by > > > > > an active-low data-enable signal. > > > > > > > > > > The overlay is also combined with the various Apalis Evaluation Board > > > > > device trees to provide ready-to-use DTBs. > > > > > > > > > > Signed-off-by: Leonardo Costa > > > > > --- > > > > > arch/arm/boot/dts/nxp/imx/Makefile | 21 ++++++ > > > > > .../boot/dts/nxp/imx/imx6q-apalis-eval-vga.dtso | 80 ++++++++++++++++++++++ > > > > > > > > what's difference with > > > > > > > > https://lore.kernel.org/imx/20261019-colibri-imx6-overlays-v1-5-e4d028727382@toradex.com/T/#u > > > > > > > > Is it possible share one dtso also? > > > > > > > > Frank > > > > > > Hi Frank, > > > > > > The Apalis iMX6 one needs to set up the connection between the IPU the > > > LCD interface (endpoints ipu2_di0_disp0 and vga_display_in), and the > > > Colibri iMX6 one uses a DVI connector instead of a VGA one. Most of all, > > > the bridge on the Colibri iMX6 doesn't have any control signals, while > > > this one on the Apalis iMX6 has an active-low data-enable signal > > > > This make sense to use difference dtso to cover it. Is it use name > > imx6q-ipu-di0-vga.dtso, because this dtso have not boards specific part, > > which can reuse for other similar hardware? Or we can rename it when reuse > > happen. > > I think the overlay should be kept as imx6q-apalis-eval-vga.dtso. As it > currently is, it's easy to identify the hardware it may be used with. If > another board is added which uses the same interface in this same way, > we can evaluate if it's adequate to change names for reusability. 2 more cents. There is no such other board in the toradex portfolio and it's very unlikely we are going to build any new board with an old VGA interface. Francesco