From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 809892E717B; Mon, 12 Oct 2026 16:40:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.167.242.64 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791823260; cv=none; b=uI/Xa8nigljMvMCeJCM9Ok1JGGFeMn3Z6Qd/A+0T8+EfNwW4iNlaEOQhzJlDLArqA/fNlzf1YgsJMGusyGi8rGbQLL+sVIMmxSi9ujG5uxh4nmmPx2R+JPWdMNs7Uti183JlkG6v0vF7MNHpTXLCucpVjS5iEN5y4Vm/0XaHPz8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791823260; c=relaxed/simple; bh=psu8SUNxGWOkv+ylpg3Mn+GzzgQJS+IaRBtMvOCtzD0=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Pi5aMlbxd2t3u3AuC4cH/j+rBa2CKhw/H1UDiDcRtKSRHOzLGmdJYFPooDR82/35DT7uKedsvbb7OMDlJHNFoCYZeHbEaYQSuWNhYvexum0GbZVn39lGl42SFUIAxb7BzP/p3QzvpkkH3LzhQf7ZAUxKs0RmormIVU6YggUoHn0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=ideasonboard.com; spf=pass smtp.mailfrom=ideasonboard.com; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b=hnc5ghg+; arc=none smtp.client-ip=213.167.242.64 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="hnc5ghg+" Received: from killaraus.ideasonboard.com (i68975AE2.versanet.de [104.151.90.226]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 548F322B; Mon, 12 Oct 2026 18:38:54 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1791823134; bh=psu8SUNxGWOkv+ylpg3Mn+GzzgQJS+IaRBtMvOCtzD0=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=hnc5ghg+R78pkLio/XQ2zib4fsPKVAHorkCShNxFoD4zgwwrLD2NIcUtbT8pUvzTs Xw7bWX9M0vc7aktIrGNXxW1xwOq8V/a33mjOSm1DBMdHOXTOUhKAVVU4UyMX6bkCXr Irp4BHU/3pyjtlDvlqUucJq65YtM9uPKgarMmyk0= Date: Mon, 12 Oct 2026 18:40:54 +0200 From: Laurent Pinchart To: Leonardo Costa Cc: Andrzej Hajda , Neil Armstrong , Robert Foss , Jonas Karlman , Jernej Skrabec , Luca Ceresoli , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , 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 0/3] Add VGA support for Apalis iMX6 Message-ID: <20261012164054.GA56180@killaraus.ideasonboard.com> References: <20261012-v1-apalis-imx6-enable-vga-v1-0-8905d8746504@toradex.com> 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=utf-8 Content-Disposition: inline In-Reply-To: <20261012-v1-apalis-imx6-enable-vga-v1-0-8905d8746504@toradex.com> On Mon, Oct 12, 2026 at 04:25:22AM -0300, Leonardo Costa wrote: > This series adds a device tree overlay that enables the VGA output on Apalis > iMX6, which is driven from a parallel RGB interface passing through a > non-programmable video DAC. > > The video DAC is a simple resistor network gated by an active-low > data-enable signal. For the bridge to work properly, this series also > changes the following in the dt-bindings and simple-bridge driver: > > - dt-bindings: Add a new compatible for the bridge in the simple-bridge > binding. This is necessary because the existing dumb-vga-dac compatible > doesn't describe a data-enable signal polarity. > > - simple-bridge: Add the VGA bridge match-table entry and timings > struct, setting the DRM_BUS_FLAG_DE_LOW flag for the bridge. Is there schematics available anywhere ? That would help reviewing the series ? > > This change depends on another patch, and should be applied after it: > > - https://lore.kernel.org/all/20261002-v1-simple-bridge-atomic-check-v1-1-ef5d8332b078@toradex.com/T/#u > > Adds the atomic_check function to the simple-bridge driver, which > allows the data-enable bus flag to be propagated through the DRM > pipeline. This is necessary for the VGA to work correctly on the > Apalis iMX6. > > Signed-off-by: Leonardo Costa > --- > Leonardo Costa (3): > dt-bindings: display: bridge: simple: Add the Toradex Apalis iMX6 VGA DAC bridge > drm/bridge: simple-bridge: Add Toradex RGB to VGA DAC bridge > ARM: dts: imx6q-apalis: Add VGA overlay > > .../bindings/display/bridge/simple-bridge.yaml | 1 + > arch/arm/boot/dts/nxp/imx/Makefile | 21 ++++++ > .../boot/dts/nxp/imx/imx6q-apalis-eval-vga.dtso | 79 ++++++++++++++++++++++ > drivers/gpu/drm/bridge/simple-bridge.c | 10 +++ > 4 files changed, 111 insertions(+) > --- > base-commit: f5f84daefcd92d7a630066635ecea1433ed5eac7 > change-id: 20260928-v1-apalis-imx6-enable-vga-5c7ba6b358fe -- Regards, Laurent Pinchart