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 1CC02D13588 for ; Mon, 28 Oct 2024 10:54:58 +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=5gcR1znD1cGAtY6UrFbxboTgffk6OVdycQmErW5b3Qg=; b=cDxDaZO7vTsRh0yUqBYfbb/Nnc IrhL0WHueGLmhcWHnfF2ztw/SJlxYz1yeuvIf0PJnyrcqIYFHjt1CASjBTHGaY3PKGidaquaVoJFQ ejybpiu3fRkp18Ej20xQU1YByHca1oyZ/XpVzeW8j4qckKJ1P1X5P+rQeO0nzuSvNLcKqKA5H+HmM LN4wonM4sf+V886SNWA46E999ATEyW/at+MWrLOqWxlvbnpls5nBRUm6DC3WZq8G0mY+CFoyFkKcj sslAQTqz7d33807qusOz1gqzYLrgcss7xxoRQQJiOF2ilmCbEWGpnrt2020VqkEdcWBHprr3wQr9Z SbdHnodw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1t5NOZ-0000000ATqr-23Am; Mon, 28 Oct 2024 10:54:47 +0000 Received: from nyc.source.kernel.org ([2604:1380:45d1:ec00::3]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1t5NJx-0000000ASgS-3jht for linux-arm-kernel@lists.infradead.org; Mon, 28 Oct 2024 10:50:03 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by nyc.source.kernel.org (Postfix) with ESMTP id 4023FA41AE2; Mon, 28 Oct 2024 10:48:04 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6D388C4CEC3; Mon, 28 Oct 2024 10:49:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1730112599; bh=5gcR1znD1cGAtY6UrFbxboTgffk6OVdycQmErW5b3Qg=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=VGtDN4rCB75s5s0aUagy+xt8qdgqkWDO7bcJSQo6NCniEXIl6De1+xQqmvmZKTMNu 5pVmauCmMVuEgflzUrOepb/hIPUuq75qgoMLTlveFBuqPH96Btsbw0hhIqRvQW0cWi nkB+O7GV66nyRa7n0kUzql9jEPjVoB/Mk+JL/ToAybXnCb+Tm8TWc4Wmts02N7rcjw L3ns2Nn+j8o6kto65VgI862il+H/dP24X51QrlRMsGk3LHOLJcWcM7J3VT3M7a+9Ik bpBkonJL4OdxoMJMg03+WCJfi+QG5W3itXVJomovKxkqYjb+4CV8qhyJXWTjEJl7cX 7AoRu5HYBGSmw== Date: Mon, 28 Oct 2024 11:49:57 +0100 From: Maxime Ripard To: Dario Binacchi Cc: linux-kernel@vger.kernel.org, linux-amarula@amarulasolutions.com, Andrey Smirnov , Andrzej Hajda , Conor Dooley , David Airlie , Fabio Estevam , Inki Dae , Jagan Teki , Jernej Skrabec , Jessica Zhang , Jonas Karlman , Krzysztof Kozlowski , Krzysztof Kozlowski , Laurent Pinchart , Lucas Stach , Maarten Lankhorst , Marek Szyprowski , Marek Vasut , Michael Trimarchi , Neil Armstrong , Peng Fan , Pengutronix Kernel Team , Rob Herring , Robert Foss , Sascha Hauer , Shawn Guo , Shengjiu Wang , Simona Vetter , Stefan Agner , Thomas Zimmermann , Ulf Hansson , Uwe =?utf-8?Q?Kleine-K=C3=B6nig?= , devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-pm@vger.kernel.org Subject: Re: [RFC PATCH 00/10] Support simple-framebuffer on imx8m Message-ID: <20241028-scrupulous-paper-condor-0742fb@houat> References: <20241028102559.1451383-1-dario.binacchi@amarulasolutions.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha384; protocol="application/pgp-signature"; boundary="mpcp65bzqsipkaam" Content-Disposition: inline In-Reply-To: <20241028102559.1451383-1-dario.binacchi@amarulasolutions.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241028_035002_143462_7449BC0C X-CRM114-Status: GOOD ( 18.29 ) 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 --mpcp65bzqsipkaam Content-Type: text/plain; protected-headers=v1; charset=us-ascii Content-Disposition: inline Subject: Re: [RFC PATCH 00/10] Support simple-framebuffer on imx8m MIME-Version: 1.0 Hi, On Mon, Oct 28, 2024 at 11:25:23AM +0100, Dario Binacchi wrote: > This series is the Linux counterpart of what was sent to U-Boot [1] > for the support of the simple-framebuffer for the BSH SMM S2Pro board. I'm confused. simple-framebuffer is a mechanism for which the entire point is that the kernel doesn't need the driver for. Why do you need to have patches for bridges and panels for simple-framebuffer? They won't be used. > The need to avoid re-initializing the hardware (power domains, > controllers, bridges, display panels) that has already been initialized > and kept powered on by the bootloader has required updating more than > one YAML file, with the addition of boolean properties to inform the > driver that the corresponding hardware has been initialized and left > on by the bootloader. All these properties are added on the fly by the > bootloader to the various relevant nodes. So it's not about simple-framebuffer at all, but rather that you don't want to re-initialize the hardware that has already been setup? If so, this isn't how you should do it, but rather: https://lore.kernel.org/all/CAKMK7uHtqHy_oz4W7F+hmp9iqp7W5Ra8CxPvJ=9BwmvfU-O0gg@mail.gmail.com/ Maxime --mpcp65bzqsipkaam Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iJUEABMJAB0WIQTkHFbLp4ejekA/qfgnX84Zoj2+dgUCZx9sUAAKCRAnX84Zoj2+ dmtQAX9wVFF++uMLanShp1lqMmKbCAPRFsgHbuZ+e7vfogD2WBD/EF768xzbQaKx 8geIGicBgLRVa5ByCU/nhpBq9G9w4jzWcQ3tuYcJYH2sUP44PdFel9LS9HcmKc2G pooK6h9HIg== =7XGK -----END PGP SIGNATURE----- --mpcp65bzqsipkaam--