From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 911F4606A334 for ; Mon, 26 Oct 2026 12:43:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=TpFvb8LV; dkim=pass (2048-bit key, unprotected) header.d=dolcini.it header.i=@dolcini.it header.a=rsa-sha256 header.s=default header.b=c0j25kco 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-Unsubscribe-Post:List-Owner; bh=8Jq41rEZlW8dpYSa9haaT2V6LwzTgLLlt9p+Cr4IhUw=; b=TpFvb8LVh7lajQOSWdnu3CH7KK OoATAsz+ag3y+Yzp/GHT5RnJWl8gskjvY2JFHi9XiW34wRtfpPG1VckiOa1siMlvfF6WWS3pRporm hAtB6pk4pRAfVbJLB23U3+FK7kS8nmCYwvDwhp5uJU/sT223CzflipVjIKeWtsu7Fgop8gImBzCrS mxFgZ47Ec4IYoQX3xtn2e4G3QRUvlYC0q0HNw/KmoBAKvr6eugqC7O7CiMpC7VFBZOi933t/K0B0j JNSgMuPMg2O8m9b74YmowQAcrnmaToNpcxz2JOtFA+TnHYOqdATaiROeAR8F+VWhkqN5/5I1lnNig pNvDAgQA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xLK37-00000002Wku-3xLA; Mon, 26 Oct 2026 12:43:37 +0000 Received: from mail11.truemail.it ([217.194.8.81]) by bombadil.infradead.org with esmtps (Exim 4.100.1 #2 (Red Hat Linux)) id 1xLK35-00000002WkJ-0qU7 for linux-arm-kernel@lists.infradead.org; Mon, 26 Oct 2026 12:43:36 +0000 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-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261026_054335_402617_90CF112A X-CRM114-Status: GOOD ( 28.81 ) X-Spam-Score: -2.1 (--) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" X-Spam-Status: No, score=-16.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 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